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1664a90985
NetBSD/usr.bin/make/job.c
jmc 1664a90985 Fixes for PR#18573 (make -j not stopping correctly on error). 
Using -e in sh/ksh to stop on error doesn't work with grouped commands. At
least for any SUSE compliant sh(1). Instead, extend the Shell struct and add
errOut which provides a template to use to check error status from commands.
2003-12-20 00:18:22 +00:00

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/* $NetBSD: job.c,v 1.83 2003/12/20 00:18:22 jmc Exp $ */
/*
* Copyright (c) 1988, 1989, 1990 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Adam de Boor.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*
* Copyright (c) 1988, 1989 by Adam de Boor
* Copyright (c) 1989 by Berkeley Softworks
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Adam de Boor.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifdef MAKE_BOOTSTRAP
static char rcsid[] = "$NetBSD: job.c,v 1.83 2003/12/20 00:18:22 jmc Exp $";
#else
#include <sys/cdefs.h>
#ifndef lint
#if 0
static char sccsid[] = "@(#)job.c 8.2 (Berkeley) 3/19/94";
#else
__RCSID("$NetBSD: job.c,v 1.83 2003/12/20 00:18:22 jmc Exp $");
#endif
#endif /* not lint */
#endif
/*-
* job.c --
* handle the creation etc. of our child processes.
*
* Interface:
* Job_Make Start the creation of the given target.
*
* Job_CatchChildren Check for and handle the termination of any
* children. This must be called reasonably
* frequently to keep the whole make going at
* a decent clip, since job table entries aren't
* removed until their process is caught this way.
* Its single argument is TRUE if the function
* should block waiting for a child to terminate.
*
* Job_CatchOutput Print any output our children have produced.
* Should also be called fairly frequently to
* keep the user informed of what's going on.
* If no output is waiting, it will block for
* a time given by the SEL_* constants, below,
* or until output is ready.
*
* Job_Init Called to intialize this module. in addition,
* any commands attached to the .BEGIN target
* are executed before this function returns.
* Hence, the makefile must have been parsed
* before this function is called.
*
* Job_End Cleanup any memory used.
*
* Job_Empty Return TRUE if the job table is completely
* empty.
*
* Job_ParseShell Given the line following a .SHELL target, parse
* the line as a shell specification. Returns
* FAILURE if the spec was incorrect.
*
* Job_Finish Perform any final processing which needs doing.
* This includes the execution of any commands
* which have been/were attached to the .END
* target. It should only be called when the
* job table is empty.
*
* Job_AbortAll Abort all currently running jobs. It doesn't
* handle output or do anything for the jobs,
* just kills them. It should only be called in
* an emergency, as it were.
*
* Job_CheckCommands Verify that the commands for a target are
* ok. Provide them if necessary and possible.
*
* Job_Touch Update a target without really updating it.
*
* Job_Wait Wait for all currently-running jobs to finish.
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/file.h>
#include <sys/time.h>
#include <sys/wait.h>
#include <errno.h>
#include <fcntl.h>
#ifndef RMT_WILL_WATCH
#ifndef USE_SELECT
#include <poll.h>
#endif
#endif
#include <signal.h>
#include <stdio.h>
#include <string.h>
#include <utime.h>
#include "make.h"
#include "hash.h"
#include "dir.h"
#include "job.h"
#include "pathnames.h"
#include "trace.h"
#ifdef REMOTE
#include "rmt.h"
# define STATIC
#else
# define STATIC static
#endif
/*
* error handling variables
*/
static int errors = 0; /* number of errors reported */
static int aborting = 0; /* why is the make aborting? */
#define ABORT_ERROR 1 /* Because of an error */
#define ABORT_INTERRUPT 2 /* Because it was interrupted */
#define ABORT_WAIT 3 /* Waiting for jobs to finish */
/*
* XXX: Avoid SunOS bug... FILENO() is fp->_file, and file
* is a char! So when we go above 127 we turn negative!
*/
#define FILENO(a) ((unsigned) fileno(a))
/*
* post-make command processing. The node postCommands is really just the
* .END target but we keep it around to avoid having to search for it
* all the time.
*/
static GNode *postCommands = NILGNODE;
/* node containing commands to execute when
* everything else is done */
static int numCommands; /* The number of commands actually printed
* for a target. Should this number be
* 0, no shell will be executed. */
/*
* Return values from JobStart.
*/
#define JOB_RUNNING 0 /* Job is running */
#define JOB_ERROR 1 /* Error in starting the job */
#define JOB_FINISHED 2 /* The job is already finished */
#define JOB_STOPPED 3 /* The job is stopped */
/*
* Descriptions for various shells.
*/
static Shell shells[] = {
/*
* CSH description. The csh can do echo control by playing
* with the setting of the 'echo' shell variable. Sadly,
* however, it is unable to do error control nicely.
*/
{
"csh",
TRUE, "unset verbose", "set verbose", "unset verbose", 10,
FALSE, "echo \"%s\"\n", "csh -c \"%s || exit 0\"", "", '#',
"v", "e",
},
/*
* SH description. Echo control is also possible and, under
* sun UNIX anyway, one can even control error checking.
*/
{
"sh",
FALSE, "", "", "", 0,
FALSE, "echo \"%s\"\n", "%s\n", "{ %s \n} || exit $?\n", '#',
#ifdef __NetBSD__
"q",
#else
"",
#endif
"",
},
/*
* KSH description.
*/
{
"ksh",
TRUE, "set +v", "set -v", "set +v", 6,
FALSE, "echo \"%s\"\n", "%s\n", "{ %s \n} || exit $?\n", '#',
"v",
"",
},
/*
* UNKNOWN.
*/
{
(char *) 0,
FALSE, (char *) 0, (char *) 0, (char *) 0, 0,
FALSE, (char *) 0, (char *) 0, (char *) 0, 0,
(char *) 0, (char *) 0,
}
};
static Shell *commandShell = &shells[DEFSHELL];/* this is the shell to
* which we pass all
* commands in the Makefile.
* It is set by the
* Job_ParseShell function */
const char *shellPath = NULL, /* full pathname of
* executable image */
*shellName = NULL; /* last component of shell */
static const char *shellArgv = NULL; /* Custom shell args */
static int maxJobs; /* The most children we can run at once */
static int maxLocal; /* The most local ones we can have */
STATIC int nJobs; /* The number of children currently running */
STATIC int nLocal; /* The number of local children */
STATIC Lst jobs; /* The structures that describe them */
static Boolean wantToken; /* we want a token */
/*
* Set of descriptors of pipes connected to
* the output channels of children
*/
#ifndef RMT_WILL_WATCH
static struct pollfd *fds = NULL;
static Job **jobfds = NULL;
static int nfds = 0;
static int maxfds = 0;
static void watchfd(Job *);
static void clearfd(Job *);
static int readyfd(Job *);
#define JBSTART 256
#define JBFACTOR 2
#endif
STATIC GNode *lastNode; /* The node for which output was most recently
* produced. */
STATIC const char *targFmt; /* Format string to use to head output from a
* job when it's not the most-recent job heard
* from */
static Job tokenWaitJob; /* token wait pseudo-job */
int job_pipe[2] = { -1, -1 }; /* job server pipes. */
static Job childExitJob; /* child exit pseudo-job */
int exit_pipe[2] = { -1, -1 }; /* child exit signal pipe. */
#ifdef REMOTE
# define TARG_FMT "--- %s at %s ---\n" /* Default format */
# define MESSAGE(fp, gn) \
(void) fprintf(fp, targFmt, gn->name, gn->rem.hname)
#else
# define TARG_FMT "--- %s ---\n" /* Default format */
# define MESSAGE(fp, gn) \
(void) fprintf(fp, targFmt, gn->name)
#endif
/*
* When JobStart attempts to run a job remotely but can't, and isn't allowed
* to run the job locally, or when Job_CatchChildren detects a job that has
* been migrated home, the job is placed on the stoppedJobs queue to be run
* when the next job finishes.
*/
STATIC Lst stoppedJobs; /* Lst of Job structures describing
* jobs that were stopped due to concurrency
* limits or migration home */
sigset_t caught_signals; /* Set of signals we handle */
#if defined(USE_PGRP) && defined(SYSV)
# define KILL(pid, sig) kill(-(pid), (sig))
#else
# if defined(USE_PGRP)
# define KILL(pid, sig) killpg((pid), (sig))
# else
# define KILL(pid, sig) kill((pid), (sig))
# endif
#endif
/*
* Grmpf... There is no way to set bits of the wait structure
* anymore with the stupid W*() macros. I liked the union wait
* stuff much more. So, we devise our own macros... This is
* really ugly, use dramamine sparingly. You have been warned.
*/
#ifndef W_STOPCODE
#define W_STOPCODE(sig) (((sig) << 8) | 0177)
#endif
#ifndef W_EXITCODE
#define W_EXITCODE(ret, sig) ((ret << 8) | (sig))
#endif
static int JobCondPassSig(ClientData, ClientData);
static void JobPassSig(int);
static void JobChildSig(int);
#ifdef USE_PGRP
static void JobContinueSig(int);
#endif
static int JobCmpPid(ClientData, ClientData);
static int JobPrintCommand(ClientData, ClientData);
static int JobSaveCommand(ClientData, ClientData);
static void JobClose(Job *);
#ifdef REMOTE
static int JobCmpRmtID(ClientData, ClientData);
# ifdef RMT_WILL_WATCH
static void JobLocalInput(int, Job *);
# endif
#else
static void JobFinish(Job *, int *);
static void JobExec(Job *, char **);
#endif
static void JobMakeArgv(Job *, char **);
static int JobRestart(Job *);
static int JobStart(GNode *, int, Job *);
static char *JobOutput(Job *, char *, char *, int);
static void JobDoOutput(Job *, Boolean);
static Shell *JobMatchShell(const char *);
static void JobInterrupt(int, int);
static void JobRestartJobs(void);
static void JobTokenAdd(void);
static void JobSigLock(sigset_t *);
static void JobSigUnlock(sigset_t *);
static void JobSigReset(void);
/*
* JobSigLock/JobSigUnlock
*
* Signal lock routines to get exclusive access. Currently used to
* protect `jobs' and `stoppedJobs' list manipulations.
*/
static void JobSigLock(sigset_t *omaskp)
{
if (sigprocmask(SIG_BLOCK, &caught_signals, omaskp) != 0) {
Punt("JobSigLock: sigprocmask: %s", strerror(errno));
sigemptyset(omaskp);
}
}
static void JobSigUnlock(sigset_t *omaskp)
{
(void) sigprocmask(SIG_SETMASK, omaskp, NULL);
}
/*-
*-----------------------------------------------------------------------
* JobCondPassSig --
* Pass a signal to a job if the job is remote or if USE_PGRP
* is defined.
*
* Input:
* jobp Job to biff
* signop Signal to send it
*
* Results:
* === 0
*
* Side Effects:
* None, except the job may bite it.
*
*-----------------------------------------------------------------------
*/
static int
JobCondPassSig(ClientData jobp, ClientData signop)
{
Job *job = (Job *) jobp;
int signo = *(int *) signop;
#ifdef RMT_WANTS_SIGNALS
if (job->flags & JOB_REMOTE) {
(void) Rmt_Signal(job, signo);
} else {
KILL(job->pid, signo);
}
#else
/*
* Assume that sending the signal to job->pid will signal any remote
* job as well.
*/
if (DEBUG(JOB)) {
(void) fprintf(stdout,
"JobCondPassSig passing signal %d to child %d.\n",
signo, job->pid);
(void) fflush(stdout);
}
KILL(job->pid, signo);
#endif
return 0;
}
/*-
*-----------------------------------------------------------------------
* JobChldSig --
* SIGCHLD handler.
*
* Input:
* signo The signal number we've received
*
* Results:
* None.
*
* Side Effects:
* Sends a token on the child exit pipe to wake us up from
* select()/poll().
*
*-----------------------------------------------------------------------
*/
static void
JobChildSig(int signo)
{
write(exit_pipe[1], ".", 1);
}
#ifdef USE_PGRP
/*-
*-----------------------------------------------------------------------
* JobContinueSig --
* Resume all stopped jobs.
*
* Input:
* signo The signal number we've received
*
* Results:
* None.
*
* Side Effects:
* Jobs start running again.
*
*-----------------------------------------------------------------------
*/
static void
JobContinueSig(int signo)
{
JobRestartJobs();
}
#endif
/*-
*-----------------------------------------------------------------------
* JobPassSig --
* Pass a signal on to all remote jobs and to all local jobs if
* USE_PGRP is defined, then die ourselves.
*
* Input:
* signo The signal number we've received
*
* Results:
* None.
*
* Side Effects:
* We die by the same signal.
*
*-----------------------------------------------------------------------
*/
static void
JobPassSig(int signo)
{
sigset_t nmask, omask;
struct sigaction act;
int sigcont;
if (DEBUG(JOB)) {
(void) fprintf(stdout, "JobPassSig(%d) called.\n", signo);
(void) fflush(stdout);
}
Lst_ForEach(jobs, JobCondPassSig, (ClientData) &signo);
/*
* Deal with proper cleanup based on the signal received. We only run
* the .INTERRUPT target if the signal was in fact an interrupt. The other
* three termination signals are more of a "get out *now*" command.
*/
if (signo == SIGINT) {
JobInterrupt(TRUE, signo);
} else if ((signo == SIGHUP) || (signo == SIGTERM) || (signo == SIGQUIT)) {
JobInterrupt(FALSE, signo);
}
/*
* Leave gracefully if SIGQUIT, rather than core dumping.
*/
if (signo == SIGQUIT) {
Finish(0);
}
if (signo == SIGTSTP) {
Job_CatchChildren(FALSE);
}
/*
* Send ourselves the signal now we've given the message to everyone else.
* Note we block everything else possible while we're getting the signal.
* This ensures that all our jobs get continued when we wake up before
* we take any other signal.
*/
sigfillset(&nmask);
sigdelset(&nmask, signo);
(void) sigprocmask(SIG_SETMASK, &nmask, &omask);
act.sa_handler = SIG_DFL;
sigemptyset(&act.sa_mask);
act.sa_flags = 0;
(void) sigaction(signo, &act, NULL);
if (DEBUG(JOB)) {
(void) fprintf(stdout,
"JobPassSig passing signal %d to self.\n", signo);
(void) fflush(stdout);
}
(void) kill(getpid(), signo);
if (signo != SIGTSTP) {
sigcont = SIGCONT;
Lst_ForEach(jobs, JobCondPassSig, (ClientData) &sigcont);
}
/* Restore handler and signal mask */
act.sa_handler = JobPassSig;
(void) sigaction(signo, &act, NULL);
(void) sigprocmask(SIG_SETMASK, &omask, NULL);
}
/*-
*-----------------------------------------------------------------------
* JobCmpPid --
* Compare the pid of the job with the given pid and return 0 if they
* are equal. This function is called from Job_CatchChildren via
* Lst_Find to find the job descriptor of the finished job.
*
* Input:
* job job to examine
* pid process id desired
*
* Results:
* 0 if the pid's match
*
* Side Effects:
* None
*-----------------------------------------------------------------------
*/
static int
JobCmpPid(ClientData job, ClientData pid)
{
return *(int *) pid - ((Job *) job)->pid;
}
#ifdef REMOTE
/*-
*-----------------------------------------------------------------------
* JobCmpRmtID --
* Compare the rmtID of the job with the given rmtID and return 0 if they
* are equal.
*
* Input:
* job job to examine
* rmtID remote id desired
*
* Results:
* 0 if the rmtID's match
*
* Side Effects:
* None.
*-----------------------------------------------------------------------
*/
static int
JobCmpRmtID(ClientData job, ClientData rmtID)
{
return(*(int *) rmtID - ((Job *) job)->rmtID);
}
#endif
/*-
*-----------------------------------------------------------------------
* JobPrintCommand --
* Put out another command for the given job. If the command starts
* with an @ or a - we process it specially. In the former case,
* so long as the -s and -n flags weren't given to make, we stick
* a shell-specific echoOff command in the script. In the latter,
* we ignore errors for the entire job, unless the shell has error
* control.
* If the command is just "..." we take all future commands for this
* job to be commands to be executed once the entire graph has been
* made and return non-zero to signal that the end of the commands
* was reached. These commands are later attached to the postCommands
* node and executed by Job_End when all things are done.
* This function is called from JobStart via Lst_ForEach.
*
* Input:
* cmdp command string to print
* jobp job for which to print it
*
* Results:
* Always 0, unless the command was "..."
*
* Side Effects:
* If the command begins with a '-' and the shell has no error control,
* the JOB_IGNERR flag is set in the job descriptor.
* If the command is "..." and we're not ignoring such things,
* tailCmds is set to the successor node of the cmd.
* numCommands is incremented if the command is actually printed.
*-----------------------------------------------------------------------
*/
static int
JobPrintCommand(ClientData cmdp, ClientData jobp)
{
Boolean noSpecials; /* true if we shouldn't worry about
* inserting special commands into
* the input stream. */
Boolean shutUp = FALSE; /* true if we put a no echo command
* into the command file */
Boolean errOff = FALSE; /* true if we turned error checking
* off before printing the command
* and need to turn it back on */
const char *cmdTemplate; /* Template to use when printing the
* command */
char *cmdStart; /* Start of expanded command */
char *escCmd = NULL; /* Command with quotes/backticks escaped */
char *cmd = (char *) cmdp;
Job *job = (Job *) jobp;
char *cp;
int i, j;
noSpecials = NoExecute(job->node);
if (strcmp(cmd, "...") == 0) {
job->node->type |= OP_SAVE_CMDS;
if ((job->flags & JOB_IGNDOTS) == 0) {
job->tailCmds = Lst_Succ(Lst_Member(job->node->commands,
(ClientData)cmd));
return 1;
}
return 0;
}
#define DBPRINTF(fmt, arg) if (DEBUG(JOB)) { \
(void) fprintf(stdout, fmt, arg); \
(void) fflush(stdout); \
} \
(void) fprintf(job->cmdFILE, fmt, arg); \
(void) fflush(job->cmdFILE);
numCommands += 1;
cmdStart = cmd = Var_Subst(NULL, cmd, job->node, FALSE);
cmdTemplate = "%s\n";
/*
* Check for leading @' and -'s to control echoing and error checking.
*/
while (*cmd == '@' || *cmd == '-') {
if (*cmd == '@') {
shutUp = TRUE;
} else {
errOff = TRUE;
}
cmd++;
}
while (isspace((unsigned char) *cmd))
cmd++;
/*
* If the shell doesn't have error control the alternate echo'ing will
* be done (to avoid showing additional error checking code)
* and this will need the characters '$ ` \ "' escaped
*/
if (!commandShell->hasErrCtl) {
/* Worst that could happen is every char needs escaping. */
escCmd = (char *) emalloc((strlen(cmd) * 2) + 1);
for (i = 0, j= 0; cmd[i] != '\0'; i++, j++) {
if (cmd[i] == '$' || cmd[i] == '`' || cmd[i] == '\\' ||
cmd[i] == '"')
escCmd[j++] = '\\';
escCmd[j] = cmd[i];
}
escCmd[j] = 0;
}
if (shutUp) {
if (!(job->flags & JOB_SILENT) && !noSpecials &&
commandShell->hasEchoCtl) {
DBPRINTF("%s\n", commandShell->echoOff);
} else {
if (commandShell->hasErrCtl)
shutUp = FALSE;
}
}
if (errOff) {
if ( !(job->flags & JOB_IGNERR) && !noSpecials) {
if (commandShell->hasErrCtl) {
/*
* we don't want the error-control commands showing
* up either, so we turn off echoing while executing
* them. We could put another field in the shell
* structure to tell JobDoOutput to look for this
* string too, but why make it any more complex than
* it already is?
*/
if (!(job->flags & JOB_SILENT) && !shutUp &&
commandShell->hasEchoCtl) {
DBPRINTF("%s\n", commandShell->echoOff);
DBPRINTF("%s\n", commandShell->ignErr);
DBPRINTF("%s\n", commandShell->echoOn);
} else {
DBPRINTF("%s\n", commandShell->ignErr);
}
} else if (commandShell->ignErr &&
(*commandShell->ignErr != '\0'))
{
/*
* The shell has no error control, so we need to be
* weird to get it to ignore any errors from the command.
* If echoing is turned on, we turn it off and use the
* errCheck template to echo the command. Leave echoing
* off so the user doesn't see the weirdness we go through
* to ignore errors. Set cmdTemplate to use the weirdness
* instead of the simple "%s\n" template.
*/
if (!(job->flags & JOB_SILENT) && !shutUp) {
if (commandShell->hasEchoCtl) {
DBPRINTF("%s\n", commandShell->echoOff);
}
DBPRINTF(commandShell->errCheck, escCmd);
shutUp = TRUE;
} else {
if (!shutUp) {
DBPRINTF(commandShell->errCheck, escCmd);
}
}
cmdTemplate = commandShell->ignErr;
/*
* The error ignoration (hee hee) is already taken care
* of by the ignErr template, so pretend error checking
* is still on.
*/
errOff = FALSE;
} else {
errOff = FALSE;
}
} else {
errOff = FALSE;
}
} else {
/*
* If errors are being checked and the shell doesn't have error control
* but does supply an errOut template, then setup commands to run
* through it.
*/
if (!commandShell->hasErrCtl && commandShell->errOut &&
(*commandShell->errOut != '\0')) {
if (!(job->flags & JOB_SILENT) && !shutUp) {
if (commandShell->hasEchoCtl) {
DBPRINTF("%s\n", commandShell->echoOff);
}
DBPRINTF(commandShell->errCheck, escCmd);
shutUp = TRUE;
}
/* If it's a comment line, treat it like an ignored error */
if (escCmd[0] == commandShell->commentChar)
cmdTemplate = commandShell->ignErr;
else
cmdTemplate = commandShell->errOut;
errOff = FALSE;
}
}
if (DEBUG(SHELL) && strcmp(shellName, "sh") == 0 &&
(job->flags & JOB_TRACED) == 0) {
DBPRINTF("set -%s\n", "x");
job->flags |= JOB_TRACED;
}
if ((cp = Check_Cwd_Cmd(cmd)) != NULL) {
DBPRINTF("test -d %s && ", cp);
DBPRINTF("cd %s; ", cp);
}
DBPRINTF(cmdTemplate, cmd);
free(cmdStart);
if (escCmd)
free(escCmd);
if (errOff) {
/*
* If echoing is already off, there's no point in issuing the
* echoOff command. Otherwise we issue it and pretend it was on
* for the whole command...
*/
if (!shutUp && !(job->flags & JOB_SILENT) && commandShell->hasEchoCtl){
DBPRINTF("%s\n", commandShell->echoOff);
shutUp = TRUE;
}
DBPRINTF("%s\n", commandShell->errCheck);
}
if (shutUp && commandShell->hasEchoCtl) {
DBPRINTF("%s\n", commandShell->echoOn);
}
return 0;
}
/*-
*-----------------------------------------------------------------------
* JobSaveCommand --
* Save a command to be executed when everything else is done.
* Callback function for JobFinish...
*
* Results:
* Always returns 0
*
* Side Effects:
* The command is tacked onto the end of postCommands's commands list.
*
*-----------------------------------------------------------------------
*/
static int
JobSaveCommand(ClientData cmd, ClientData gn)
{
cmd = (ClientData) Var_Subst(NULL, (char *) cmd, (GNode *) gn, FALSE);
(void) Lst_AtEnd(postCommands->commands, cmd);
return(0);
}
/*-
*-----------------------------------------------------------------------
* JobClose --
* Called to close both input and output pipes when a job is finished.
*
* Results:
* Nada
*
* Side Effects:
* The file descriptors associated with the job are closed.
*
*-----------------------------------------------------------------------
*/
static void
JobClose(Job *job)
{
if (usePipes && (job->flags & JOB_FIRST)) {
#ifdef RMT_WILL_WATCH
Rmt_Ignore(job->inPipe);
#else
clearfd(job);
#endif
if (job->outPipe != job->inPipe) {
(void) close(job->outPipe);
}
JobDoOutput(job, TRUE);
(void) close(job->inPipe);
} else {
(void) close(job->outFd);
JobDoOutput(job, TRUE);
}
}
/*-
*-----------------------------------------------------------------------
* JobFinish --
* Do final processing for the given job including updating
* parents and starting new jobs as available/necessary. Note
* that we pay no attention to the JOB_IGNERR flag here.
* This is because when we're called because of a noexecute flag
* or something, jstat.w_status is 0 and when called from
* Job_CatchChildren, the status is zeroed if it s/b ignored.
*
* Input:
* job job to finish
* status sub-why job went away
*
* Results:
* None
*
* Side Effects:
* Some nodes may be put on the toBeMade queue.
* Final commands for the job are placed on postCommands.
*
* If we got an error and are aborting (aborting == ABORT_ERROR) and
* the job list is now empty, we are done for the day.
* If we recognized an error (errors !=0), we set the aborting flag
* to ABORT_ERROR so no more jobs will be started.
*-----------------------------------------------------------------------
*/
/*ARGSUSED*/
static void
JobFinish(Job *job, int *status)
{
Boolean done;
if ((WIFEXITED(*status) &&
(((WEXITSTATUS(*status) != 0) && !(job->flags & JOB_IGNERR)))) ||
WIFSIGNALED(*status))
{
/*
* If it exited non-zero and either we're doing things our
* way or we're not ignoring errors, the job is finished.
* Similarly, if the shell died because of a signal
* the job is also finished. In these
* cases, finish out the job's output before printing the exit
* status...
*/
#ifdef REMOTE
KILL(job->pid, SIGCONT);
#endif
JobClose(job);
if (job->cmdFILE != NULL && job->cmdFILE != stdout) {
(void) fclose(job->cmdFILE);
job->cmdFILE = NULL;
}
done = TRUE;
#ifdef REMOTE
if (job->flags & JOB_REMOTE)
Rmt_Done(job->rmtID, job->node);
#endif
} else if (WIFEXITED(*status)) {
/*
* Deal with ignored errors in -B mode. We need to print a message
* telling of the ignored error as well as setting status.w_status
* to 0 so the next command gets run. To do this, we set done to be
* TRUE if in -B mode and the job exited non-zero.
*/
done = WEXITSTATUS(*status) != 0;
/*
* Old comment said: "Note we don't
* want to close down any of the streams until we know we're at the
* end."
* But we do. Otherwise when are we going to print the rest of the
* stuff?
*/
JobClose(job);
#ifdef REMOTE
if (job->flags & JOB_REMOTE)
Rmt_Done(job->rmtID, job->node);
#endif /* REMOTE */
} else {
/*
* No need to close things down or anything.
*/
done = FALSE;
}
if (done ||
WIFSTOPPED(*status) ||
(WIFSIGNALED(*status) && (WTERMSIG(*status) == SIGCONT)))
{
FILE *out;
if (compatMake && !usePipes && (job->flags & JOB_IGNERR)) {
/*
* If output is going to a file and this job is ignoring
* errors, arrange to have the exit status sent to the
* output file as well.
*/
out = fdopen(job->outFd, "w");
if (out == NULL)
Punt("Cannot fdopen");
} else {
out = stdout;
}
if (WIFEXITED(*status)) {
if (DEBUG(JOB)) {
(void) fprintf(stdout, "Process %d [%s] exited.\n",
job->pid, job->node->name);
(void) fflush(stdout);
}
if (WEXITSTATUS(*status) != 0) {
if (usePipes && job->node != lastNode) {
MESSAGE(out, job->node);
lastNode = job->node;
}
(void) fprintf(out, "*** [%s] Error code %d%s\n",
job->node->name,
WEXITSTATUS(*status),
(job->flags & JOB_IGNERR) ? "(ignored)" : "");
if (job->flags & JOB_IGNERR) {
*status = 0;
}
} else if (DEBUG(JOB)) {
if (usePipes && job->node != lastNode) {
MESSAGE(out, job->node);
lastNode = job->node;
}
(void) fprintf(out, "*** [%s] Completed successfully\n",
job->node->name);
}
} else if (WIFSTOPPED(*status) && WSTOPSIG(*status) != SIGCONT) {
if (DEBUG(JOB)) {
(void) fprintf(stdout, "Process %d (%s) stopped.\n",
job->pid, job->node->name);
(void) fflush(stdout);
}
if (usePipes && job->node != lastNode) {
MESSAGE(out, job->node);
lastNode = job->node;
}
if (!(job->flags & JOB_REMIGRATE)) {
switch (WSTOPSIG(*status)) {
case SIGTSTP:
(void) fprintf(out, "*** [%s] Suspended\n",
job->node->name);
break;
case SIGSTOP:
(void) fprintf(out, "*** [%s] Stopped\n",
job->node->name);
break;
default:
(void) fprintf(out, "*** [%s] Stopped -- signal %d\n",
job->node->name, WSTOPSIG(*status));
}
}
job->flags |= JOB_RESUME;
(void)Lst_AtEnd(stoppedJobs, (ClientData)job);
#ifdef REMOTE
if (job->flags & JOB_REMIGRATE)
JobRestart(job);
#endif
(void) fflush(out);
return;
} else if (WIFSTOPPED(*status) && WSTOPSIG(*status) == SIGCONT) {
/*
* If the beastie has continued, shift the Job from the stopped
* list to the running one (or re-stop it if concurrency is
* exceeded) and go and get another child.
*/
if (job->flags & (JOB_RESUME|JOB_REMIGRATE|JOB_RESTART)) {
if (usePipes && job->node != lastNode) {
MESSAGE(out, job->node);
lastNode = job->node;
}
(void) fprintf(out, "*** [%s] Continued\n", job->node->name);
}
if (!(job->flags & JOB_CONTINUING)) {
if (DEBUG(JOB)) {
(void) fprintf(stdout,
"Warning: process %d [%s] was not continuing.\n",
job->pid, job->node->name);
(void) fflush(stdout);
}
#ifdef notdef
/*
* We don't really want to restart a job from scratch just
* because it continued, especially not without killing the
* continuing process! That's why this is ifdef'ed out.
* FD - 9/17/90
*/
JobRestart(job);
#endif
}
job->flags &= ~JOB_CONTINUING;
Lst_AtEnd(jobs, (ClientData)job);
nJobs += 1;
if (!(job->flags & JOB_REMOTE)) {
if (DEBUG(JOB)) {
(void) fprintf(stdout,
"Process %d is continuing locally.\n",
job->pid);
(void) fflush(stdout);
}
nLocal += 1;
}
(void) fflush(out);
return;
} else {
if (usePipes && job->node != lastNode) {
MESSAGE(out, job->node);
lastNode = job->node;
}
(void) fprintf(out, "*** [%s] Signal %d\n",
job->node->name, WTERMSIG(*status));
}
(void) fflush(out);
}
/*
* Now handle the -B-mode stuff. If the beast still isn't finished,
* try and restart the job on the next command. If JobStart says it's
* ok, it's ok. If there's an error, this puppy is done.
*/
if (compatMake && (WIFEXITED(*status) &&
!Lst_IsAtEnd(job->node->commands))) {
switch (JobStart(job->node, job->flags & JOB_IGNDOTS, job)) {
case JOB_RUNNING:
done = FALSE;
break;
case JOB_ERROR:
done = TRUE;
*status = W_EXITCODE(1, 0);
break;
case JOB_FINISHED:
/*
* If we got back a JOB_FINISHED code, JobStart has already
* called Make_Update and freed the job descriptor. We set
* done to false here to avoid fake cycles and double frees.
* JobStart needs to do the update so we can proceed up the
* graph when given the -n flag..
*/
done = FALSE;
break;
}
} else {
done = TRUE;
}
if (done) {
Trace_Log(JOBEND, job);
if (!compatMake && !(job->flags & JOB_SPECIAL)) {
if ((*status != 0) ||
(aborting == ABORT_ERROR) ||
(aborting == ABORT_INTERRUPT))
Job_TokenReturn();
}
}
if (done &&
(aborting != ABORT_ERROR) &&
(aborting != ABORT_INTERRUPT) &&
(*status == 0))
{
/*
* As long as we aren't aborting and the job didn't return a non-zero
* status that we shouldn't ignore, we call Make_Update to update
* the parents. In addition, any saved commands for the node are placed
* on the .END target.
*/
if (job->tailCmds != NILLNODE) {
Lst_ForEachFrom(job->node->commands, job->tailCmds,
JobSaveCommand,
(ClientData)job->node);
}
job->node->made = MADE;
if (!(job->flags & JOB_SPECIAL))
Job_TokenReturn();
Make_Update(job->node);
free((Address)job);
} else if (*status != 0) {
errors += 1;
free((Address)job);
}
JobRestartJobs();
/*
* Set aborting if any error.
*/
if (errors && !keepgoing && (aborting != ABORT_INTERRUPT)) {
/*
* If we found any errors in this batch of children and the -k flag
* wasn't given, we set the aborting flag so no more jobs get
* started.
*/
aborting = ABORT_ERROR;
}
if ((aborting == ABORT_ERROR) && Job_Empty()) {
/*
* If we are aborting and the job table is now empty, we finish.
*/
Finish(errors);
}
}
/*-
*-----------------------------------------------------------------------
* Job_Touch --
* Touch the given target. Called by JobStart when the -t flag was
* given
*
* Input:
* gn the node of the file to touch
* silent TRUE if should not print message
*
* Results:
* None
*
* Side Effects:
* The data modification of the file is changed. In addition, if the
* file did not exist, it is created.
*-----------------------------------------------------------------------
*/
void
Job_Touch(GNode *gn, Boolean silent)
{
int streamID; /* ID of stream opened to do the touch */
struct utimbuf times; /* Times for utime() call */
if (gn->type & (OP_JOIN|OP_USE|OP_USEBEFORE|OP_EXEC|OP_OPTIONAL|OP_PHONY)) {
/*
* .JOIN, .USE, .ZEROTIME and .OPTIONAL targets are "virtual" targets
* and, as such, shouldn't really be created.
*/
return;
}
if (!silent || NoExecute(gn)) {
(void) fprintf(stdout, "touch %s\n", gn->name);
(void) fflush(stdout);
}
if (NoExecute(gn)) {
return;
}
if (gn->type & OP_ARCHV) {
Arch_Touch(gn);
} else if (gn->type & OP_LIB) {
Arch_TouchLib(gn);
} else {
char *file = gn->path ? gn->path : gn->name;
times.actime = times.modtime = now;
if (utime(file, &times) < 0){
streamID = open(file, O_RDWR | O_CREAT, 0666);
if (streamID >= 0) {
char c;
/*
* Read and write a byte to the file to change the
* modification time, then close the file.
*/
if (read(streamID, &c, 1) == 1) {
(void) lseek(streamID, (off_t)0, SEEK_SET);
(void) write(streamID, &c, 1);
}
(void) close(streamID);
} else {
(void) fprintf(stdout, "*** couldn't touch %s: %s",
file, strerror(errno));
(void) fflush(stdout);
}
}
}
}
/*-
*-----------------------------------------------------------------------
* Job_CheckCommands --
* Make sure the given node has all the commands it needs.
*
* Input:
* gn The target whose commands need verifying
* abortProc Function to abort with message
*
* Results:
* TRUE if the commands list is/was ok.
*
* Side Effects:
* The node will have commands from the .DEFAULT rule added to it
* if it needs them.
*-----------------------------------------------------------------------
*/
Boolean
Job_CheckCommands(GNode *gn, void (*abortProc)(const char *, ...))
{
if (OP_NOP(gn->type) && Lst_IsEmpty(gn->commands) &&
((gn->type & OP_LIB) == 0 || Lst_IsEmpty(gn->children))) {
/*
* No commands. Look for .DEFAULT rule from which we might infer
* commands
*/
if ((DEFAULT != NILGNODE) && !Lst_IsEmpty(DEFAULT->commands)) {
char *p1;
/*
* Make only looks for a .DEFAULT if the node was never the
* target of an operator, so that's what we do too. If
* a .DEFAULT was given, we substitute its commands for gn's
* commands and set the IMPSRC variable to be the target's name
* The DEFAULT node acts like a transformation rule, in that
* gn also inherits any attributes or sources attached to
* .DEFAULT itself.
*/
Make_HandleUse(DEFAULT, gn);
Var_Set(IMPSRC, Var_Value(TARGET, gn, &p1), gn, 0);
if (p1)
free(p1);
} else if (Dir_MTime(gn) == 0) {
/*
* The node wasn't the target of an operator we have no .DEFAULT
* rule to go on and the target doesn't already exist. There's
* nothing more we can do for this branch. If the -k flag wasn't
* given, we stop in our tracks, otherwise we just don't update
* this node's parents so they never get examined.
*/
static const char msg[] = ": don't know how to make";
if (gn->type & OP_OPTIONAL) {
(void) fprintf(stdout, "%s%s %s(ignored)\n", progname,
msg, gn->name);
(void) fflush(stdout);
} else if (keepgoing) {
(void) fprintf(stdout, "%s%s %s(continuing)\n", progname,
msg, gn->name);
(void) fflush(stdout);
return FALSE;
} else {
(*abortProc)("%s%s %s. Stop", progname, msg, gn->name);
return FALSE;
}
}
}
return TRUE;
}
#ifdef RMT_WILL_WATCH
/*-
*-----------------------------------------------------------------------
* JobLocalInput --
* Handle a pipe becoming readable. Callback function for Rmt_Watch
*
* Input:
* stream Stream that's ready (ignored)
* job Job to which the stream belongs
*
* Results:
* None
*
* Side Effects:
* JobDoOutput is called.
*
*-----------------------------------------------------------------------
*/
/*ARGSUSED*/
static void
JobLocalInput(int stream, Job *job)
{
JobDoOutput(job, FALSE);
}
#endif /* RMT_WILL_WATCH */
/*-
*-----------------------------------------------------------------------
* JobExec --
* Execute the shell for the given job. Called from JobStart and
* JobRestart.
*
* Input:
* job Job to execute
*
* Results:
* None.
*
* Side Effects:
* A shell is executed, outputs is altered and the Job structure added
* to the job table.
*
*-----------------------------------------------------------------------
*/
static void
JobExec(Job *job, char **argv)
{
int cpid; /* ID of new child */
sigset_t mask;
job->flags &= ~JOB_TRACED;
if (DEBUG(JOB)) {
int i;
(void) fprintf(stdout, "Running %s %sly\n", job->node->name,
job->flags&JOB_REMOTE?"remote":"local");
(void) fprintf(stdout, "\tCommand: ");
for (i = 0; argv[i] != NULL; i++) {
(void) fprintf(stdout, "%s ", argv[i]);
}
(void) fprintf(stdout, "\n");
(void) fflush(stdout);
}
/*
* Some jobs produce no output and it's disconcerting to have
* no feedback of their running (since they produce no output, the
* banner with their name in it never appears). This is an attempt to
* provide that feedback, even if nothing follows it.
*/
if ((lastNode != job->node) && (job->flags & JOB_FIRST) &&
!(job->flags & JOB_SILENT)) {
MESSAGE(stdout, job->node);
lastNode = job->node;
}
#ifdef RMT_NO_EXEC
if (job->flags & JOB_REMOTE) {
goto jobExecFinish;
}
#endif /* RMT_NO_EXEC */
/* No interruptions until this job is on the `jobs' list */
JobSigLock(&mask);
if ((cpid = vfork()) == -1) {
Punt("Cannot vfork: %s", strerror(errno));
} else if (cpid == 0) {
/*
* Reset all signal handlers; this is necessary because we also
* need to unblock signals before we exec(2).
*/
JobSigReset();
/* Now unblock signals */
sigemptyset(&mask);
JobSigUnlock(&mask);
/*
* Must duplicate the input stream down to the child's input and
* reset it to the beginning (again). Since the stream was marked
* close-on-exec, we must clear that bit in the new input.
*/
if (dup2(FILENO(job->cmdFILE), 0) == -1) {
execError("dup2", "job->cmdFILE");
_exit(1);
}
(void) fcntl(0, F_SETFD, 0);
(void) lseek(0, (off_t)0, SEEK_SET);
if (job->node->type & OP_MAKE) {
/*
* Pass job token pipe to submakes.
*/
fcntl(job_pipe[0], F_SETFD, 0);
fcntl(job_pipe[1], F_SETFD, 0);
}
if (usePipes) {
/*
* Set up the child's output to be routed through the pipe
* we've created for it.
*/
if (dup2(job->outPipe, 1) == -1) {
execError("dup2", "job->outPipe");
_exit(1);
}
} else {
/*
* We're capturing output in a file, so we duplicate the
* descriptor to the temporary file into the standard
* output.
*/
if (dup2(job->outFd, 1) == -1) {
execError("dup2", "job->outFd");
_exit(1);
}
}
/*
* The output channels are marked close on exec. This bit was
* duplicated by the dup2 (on some systems), so we have to clear
* it before routing the shell's error output to the same place as
* its standard output.
*/
(void) fcntl(1, F_SETFD, 0);
if (dup2(1, 2) == -1) {
execError("dup2", "1, 2");
_exit(1);
}
#ifdef USE_PGRP
/*
* We want to switch the child into a different process family so
* we can kill it and all its descendants in one fell swoop,
* by killing its process family, but not commit suicide.
*/
# if defined(SYSV)
(void) setsid();
# else
(void) setpgid(0, getpid());
# endif
#endif /* USE_PGRP */
#ifdef REMOTE
if (job->flags & JOB_REMOTE) {
Rmt_Exec(shellPath, argv, FALSE);
} else
#endif /* REMOTE */
{
(void) execv(shellPath, argv);
execError("exec", shellPath);
}
_exit(1);
} else {
job->pid = cpid;
Trace_Log(JOBSTART, job);
if (usePipes && (job->flags & JOB_FIRST)) {
/*
* The first time a job is run for a node, we set the current
* position in the buffer to the beginning and mark another
* stream to watch in the outputs mask
*/
job->curPos = 0;
#ifdef RMT_WILL_WATCH
Rmt_Watch(job->inPipe, JobLocalInput, job);
#else
watchfd(job);
#endif /* RMT_WILL_WATCH */
}
if (job->flags & JOB_REMOTE) {
#ifndef REMOTE
job->rmtID = 0;
#else
job->rmtID = Rmt_LastID(job->pid);
#endif /* REMOTE */
} else {
nLocal += 1;
/*
* XXX: Used to not happen if REMOTE. Why?
*/
if (job->cmdFILE != NULL && job->cmdFILE != stdout) {
(void) fclose(job->cmdFILE);
job->cmdFILE = NULL;
}
}
}
#ifdef RMT_NO_EXEC
jobExecFinish:
#endif
/*
* Now the job is actually running, add it to the table.
*/
if (DEBUG(JOB)) {
printf("JobExec(%s): pid %d added to jobs table\n",
job->node->name, job->pid);
}
nJobs += 1;
(void) Lst_AtEnd(jobs, (ClientData)job);
JobSigUnlock(&mask);
}
/*-
*-----------------------------------------------------------------------
* JobMakeArgv --
* Create the argv needed to execute the shell for a given job.
*
*
* Results:
*
* Side Effects:
*
*-----------------------------------------------------------------------
*/
static void
JobMakeArgv(Job *job, char **argv)
{
int argc;
static char args[10]; /* For merged arguments */
argv[0] = UNCONST(shellName);
argc = 1;
if ((commandShell->exit && (*commandShell->exit != '-')) ||
(commandShell->echo && (*commandShell->echo != '-')))
{
/*
* At least one of the flags doesn't have a minus before it, so
* merge them together. Have to do this because the *(&(@*#*&#$#
* Bourne shell thinks its second argument is a file to source.
* Grrrr. Note the ten-character limitation on the combined arguments.
*/
(void)snprintf(args, sizeof(args), "-%s%s",
((job->flags & JOB_IGNERR) ? "" :
(commandShell->exit ? commandShell->exit : "")),
((job->flags & JOB_SILENT) ? "" :
(commandShell->echo ? commandShell->echo : "")));
if (args[1]) {
argv[argc] = args;
argc++;
}
} else {
if (!(job->flags & JOB_IGNERR) && commandShell->exit) {
argv[argc] = UNCONST(commandShell->exit);
argc++;
}
if (!(job->flags & JOB_SILENT) && commandShell->echo) {
argv[argc] = UNCONST(commandShell->echo);
argc++;
}
}
argv[argc] = NULL;
}
/*-
*-----------------------------------------------------------------------
* JobRestart --
* Restart a job that stopped for some reason.
*
* Input:
* job Job to restart
*
* Results:
* 1 if max number of running jobs has been reached, 0 otherwise.
*
*-----------------------------------------------------------------------
*/
static int
JobRestart(Job *job)
{
#ifdef REMOTE
int host;
#endif
if (job->flags & JOB_REMIGRATE) {
if (
#ifdef REMOTE
verboseRemigrates ||
#endif
DEBUG(JOB)) {
(void) fprintf(stdout, "*** remigrating %x(%s)\n",
job->pid, job->node->name);
(void) fflush(stdout);
}
#ifdef REMOTE
if (!Rmt_ReExport(job->pid, job->node, &host)) {
if (verboseRemigrates || DEBUG(JOB)) {
(void) fprintf(stdout, "*** couldn't migrate...\n");
(void) fflush(stdout);
}
#endif
if (nLocal != maxLocal) {
/*
* Job cannot be remigrated, but there's room on the local
* machine, so resume the job and note that another
* local job has started.
*/
if (
#ifdef REMOTE
verboseRemigrates ||
#endif
DEBUG(JOB)) {
(void) fprintf(stdout, "*** resuming on local machine\n");
(void) fflush(stdout);
}
KILL(job->pid, SIGCONT);
nLocal +=1;
#ifdef REMOTE
job->flags &= ~(JOB_REMIGRATE|JOB_RESUME|JOB_REMOTE);
job->flags |= JOB_CONTINUING;
#else
job->flags &= ~(JOB_REMIGRATE|JOB_RESUME);
#endif
} else {
/*
* Job cannot be restarted. Mark the table as full and
* place the job back on the list of stopped jobs.
*/
if (
#ifdef REMOTE
verboseRemigrates ||
#endif
DEBUG(JOB)) {
(void) fprintf(stdout, "*** holding\n");
(void) fflush(stdout);
}
(void)Lst_AtFront(stoppedJobs, (ClientData)job);
return 1;
}
#ifdef REMOTE
} else {
/*
* Clear out the remigrate and resume flags. Set the continuing
* flag so we know later on that the process isn't exiting just
* because of a signal.
*/
job->flags &= ~(JOB_REMIGRATE|JOB_RESUME);
job->flags |= JOB_CONTINUING;
job->rmtID = host;
}
#endif
(void)Lst_AtEnd(jobs, (ClientData)job);
nJobs += 1;
} else if (job->flags & JOB_RESTART) {
/*
* Set up the control arguments to the shell. This is based on the
* flags set earlier for this job. If the JOB_IGNERR flag is clear,
* the 'exit' flag of the commandShell is used to cause it to exit
* upon receiving an error. If the JOB_SILENT flag is clear, the
* 'echo' flag of the commandShell is used to get it to start echoing
* as soon as it starts processing commands.
*/
char *argv[10];
JobMakeArgv(job, argv);
if (DEBUG(JOB)) {
(void) fprintf(stdout, "Restarting %s...", job->node->name);
(void) fflush(stdout);
}
#ifdef REMOTE
if ((job->node->type & OP_NOEXPORT) ||
(nLocal < maxLocal && runLocalFirst)
# ifdef RMT_NO_EXEC
|| !Rmt_Export(shellPath, argv, job)
# else
|| !Rmt_Begin(shellPath, argv, job->node)
# endif
)
#endif
{
if (((nLocal >= maxLocal) && !(job->flags & JOB_SPECIAL))) {
/*
* Can't be exported and not allowed to run locally -- put it
* back on the hold queue and mark the table full
*/
if (DEBUG(JOB)) {
(void) fprintf(stdout, "holding\n");
(void) fflush(stdout);
}
(void)Lst_AtFront(stoppedJobs, (ClientData)job);
return 1;
} else {
/*
* Job may be run locally.
*/
if (DEBUG(JOB)) {
(void) fprintf(stdout, "running locally\n");
(void) fflush(stdout);
}
job->flags &= ~JOB_REMOTE;
}
}
#ifdef REMOTE
else {
/*
* Can be exported. Hooray!
*/
if (DEBUG(JOB)) {
(void) fprintf(stdout, "exporting\n");
(void) fflush(stdout);
}
job->flags |= JOB_REMOTE;
}
#endif
JobExec(job, argv);
} else {
/*
* The job has stopped and needs to be restarted. Why it stopped,
* we don't know...
*/
if (DEBUG(JOB)) {
(void) fprintf(stdout, "Resuming %s...", job->node->name);
(void) fflush(stdout);
}
if ((nJobs != maxJobs) &&
((job->flags & JOB_REMOTE) ||
(nLocal < maxLocal) ||
((maxLocal == 0) &&
((job->flags & JOB_SPECIAL)
#ifdef REMOTE
&& (job->node->type & OP_NOEXPORT)
#endif
))))
{
/*
* If the job is remote, it's ok to resume it as long as the
* maximum concurrency won't be exceeded. If it's local and
* we haven't reached the local concurrency limit already (or the
* job must be run locally and maxLocal is 0), it's also ok to
* resume it.
*/
Boolean error;
int status;
#ifdef RMT_WANTS_SIGNALS
if (job->flags & JOB_REMOTE) {
error = !Rmt_Signal(job, SIGCONT);
} else
#endif /* RMT_WANTS_SIGNALS */
error = (KILL(job->pid, SIGCONT) != 0);
if (!error) {
/*
* Make sure the user knows we've continued the beast and
* actually put the thing in the job table.
*/
job->flags |= JOB_CONTINUING;
status = W_STOPCODE(SIGCONT);
JobFinish(job, &status);
job->flags &= ~(JOB_RESUME|JOB_CONTINUING);
if (DEBUG(JOB)) {
(void) fprintf(stdout, "done\n");
(void) fflush(stdout);
}
} else {
Error("couldn't resume %s: %s",
job->node->name, strerror(errno));
status = W_EXITCODE(1, 0);
JobFinish(job, &status);
}
} else {
/*
* Job cannot be restarted. Mark the table as full and
* place the job back on the list of stopped jobs.
*/
if (DEBUG(JOB)) {
(void) fprintf(stdout, "table full\n");
(void) fflush(stdout);
}
(void) Lst_AtFront(stoppedJobs, (ClientData)job);
return 1;
}
}
return 0;
}
/*-
*-----------------------------------------------------------------------
* JobStart --
* Start a target-creation process going for the target described
* by the graph node gn.
*
* Input:
* gn target to create
* flags flags for the job to override normal ones.
* e.g. JOB_SPECIAL or JOB_IGNDOTS
* previous The previous Job structure for this node, if any.
*
* Results:
* JOB_ERROR if there was an error in the commands, JOB_FINISHED
* if there isn't actually anything left to do for the job and
* JOB_RUNNING if the job has been started.
*
* Side Effects:
* A new Job node is created and added to the list of running
* jobs. PMake is forked and a child shell created.
*-----------------------------------------------------------------------
*/
static int
JobStart(GNode *gn, int flags, Job *previous)
{
Job *job; /* new job descriptor */
char *argv[10]; /* Argument vector to shell */
Boolean cmdsOK; /* true if the nodes commands were all right */
Boolean local; /* Set true if the job was run locally */
Boolean noExec; /* Set true if we decide not to run the job */
int tfd; /* File descriptor to the temp file */
if (previous != NULL) {
previous->flags &= ~(JOB_FIRST|JOB_IGNERR|JOB_SILENT|JOB_REMOTE);
job = previous;
} else {
job = (Job *) emalloc(sizeof(Job));
if (job == NULL) {
Punt("JobStart out of memory");
}
flags |= JOB_FIRST;
}
job->node = gn;
job->tailCmds = NILLNODE;
/*
* Set the initial value of the flags for this job based on the global
* ones and the node's attributes... Any flags supplied by the caller
* are also added to the field.
*/
job->flags = 0;
if (Targ_Ignore(gn)) {
job->flags |= JOB_IGNERR;
}
if (Targ_Silent(gn)) {
job->flags |= JOB_SILENT;
}
job->flags |= flags;
/*
* Check the commands now so any attributes from .DEFAULT have a chance
* to migrate to the node
*/
if (!compatMake && job->flags & JOB_FIRST) {
cmdsOK = Job_CheckCommands(gn, Error);
} else {
cmdsOK = TRUE;
}
#ifndef RMT_WILL_WATCH
job->inPollfd = NULL;
#endif
/*
* If the -n flag wasn't given, we open up OUR (not the child's)
* temporary file to stuff commands in it. The thing is rd/wr so we don't
* need to reopen it to feed it to the shell. If the -n flag *was* given,
* we just set the file to be stdout. Cute, huh?
*/
if (((gn->type & OP_MAKE) && !(noRecursiveExecute)) ||
(!noExecute && !touchFlag)) {
/*
* tfile is the name of a file into which all shell commands are
* put. It is used over by removing it before the child shell is
* executed. The XXXXXX in the string are replaced by the pid of
* the make process in a 6-character field with leading zeroes.
*/
char tfile[sizeof(TMPPAT)];
sigset_t mask;
/*
* We're serious here, but if the commands were bogus, we're
* also dead...
*/
if (!cmdsOK) {
DieHorribly();
}
JobSigLock(&mask);
(void)strcpy(tfile, TMPPAT);
if ((tfd = mkstemp(tfile)) == -1)
Punt("Could not create temporary file %s", strerror(errno));
(void) eunlink(tfile);
JobSigUnlock(&mask);
job->cmdFILE = fdopen(tfd, "w+");
if (job->cmdFILE == NULL) {
Punt("Could not fdopen %s", tfile);
}
(void) fcntl(FILENO(job->cmdFILE), F_SETFD, 1);
/*
* Send the commands to the command file, flush all its buffers then
* rewind and remove the thing.
*/
noExec = FALSE;
/*
* used to be backwards; replace when start doing multiple commands
* per shell.
*/
if (compatMake) {
/*
* Be compatible: If this is the first time for this node,
* verify its commands are ok and open the commands list for
* sequential access by later invocations of JobStart.
* Once that is done, we take the next command off the list
* and print it to the command file. If the command was an
* ellipsis, note that there's nothing more to execute.
*/
if ((job->flags&JOB_FIRST) && (Lst_Open(gn->commands) != SUCCESS)){
cmdsOK = FALSE;
} else {
LstNode ln = Lst_Next(gn->commands);
if ((ln == NILLNODE) ||
JobPrintCommand((ClientData) Lst_Datum(ln),
(ClientData) job))
{
noExec = TRUE;
Lst_Close(gn->commands);
}
if (noExec && !(job->flags & JOB_FIRST)) {
/*
* If we're not going to execute anything, the job
* is done and we need to close down the various
* file descriptors we've opened for output, then
* call JobDoOutput to catch the final characters or
* send the file to the screen... Note that the i/o streams
* are only open if this isn't the first job.
* Note also that this could not be done in
* Job_CatchChildren b/c it wasn't clear if there were
* more commands to execute or not...
*/
JobClose(job);
}
}
} else {
/*
* We can do all the commands at once. hooray for sanity
*/
numCommands = 0;
Lst_ForEach(gn->commands, JobPrintCommand, (ClientData)job);
/*
* If we didn't print out any commands to the shell script,
* there's not much point in executing the shell, is there?
*/
if (numCommands == 0) {
noExec = TRUE;
}
}
} else if (NoExecute(gn)) {
/*
* Not executing anything -- just print all the commands to stdout
* in one fell swoop. This will still set up job->tailCmds correctly.
*/
if (lastNode != gn) {
MESSAGE(stdout, gn);
lastNode = gn;
}
job->cmdFILE = stdout;
/*
* Only print the commands if they're ok, but don't die if they're
* not -- just let the user know they're bad and keep going. It
* doesn't do any harm in this case and may do some good.
*/
if (cmdsOK) {
Lst_ForEach(gn->commands, JobPrintCommand, (ClientData)job);
}
/*
* Don't execute the shell, thank you.
*/
noExec = TRUE;
} else {
/*
* Just touch the target and note that no shell should be executed.
* Set cmdFILE to stdout to make life easier. Check the commands, too,
* but don't die if they're no good -- it does no harm to keep working
* up the graph.
*/
job->cmdFILE = stdout;
Job_Touch(gn, job->flags&JOB_SILENT);
noExec = TRUE;
}
/*
* If we're not supposed to execute a shell, don't.
*/
if (noExec) {
/*
* Unlink and close the command file if we opened one
*/
if (job->cmdFILE != stdout) {
if (job->cmdFILE != NULL) {
(void) fclose(job->cmdFILE);
job->cmdFILE = NULL;
}
} else {
(void) fflush(stdout);
}
/*
* We only want to work our way up the graph if we aren't here because
* the commands for the job were no good.
*/
if (cmdsOK) {
if (aborting == 0) {
if (job->tailCmds != NILLNODE) {
Lst_ForEachFrom(job->node->commands, job->tailCmds,
JobSaveCommand,
(ClientData)job->node);
}
if (!(job->flags & JOB_SPECIAL))
Job_TokenReturn();
job->node->made = MADE;
Make_Update(job->node);
}
free((Address)job);
return(JOB_FINISHED);
} else {
free((Address)job);
return(JOB_ERROR);
}
} else {
(void) fflush(job->cmdFILE);
}
/*
* Set up the control arguments to the shell. This is based on the flags
* set earlier for this job.
*/
JobMakeArgv(job, argv);
/*
* If we're using pipes to catch output, create the pipe by which we'll
* get the shell's output. If we're using files, print out that we're
* starting a job and then set up its temporary-file name.
*/
if (!compatMake || (job->flags & JOB_FIRST)) {
if (usePipes) {
int fd[2];
if (pipe(fd) == -1)
Punt("Cannot create pipe: %s", strerror(errno));
job->inPipe = fd[0];
job->outPipe = fd[1];
(void) fcntl(job->inPipe, F_SETFD, 1);
(void) fcntl(job->outPipe, F_SETFD, 1);
} else {
(void) fprintf(stdout, "Remaking `%s'\n", gn->name);
(void) fflush(stdout);
(void) strcpy(job->outFile, TMPPAT);
job->outFd = mkstemp(job->outFile);
(void) fcntl(job->outFd, F_SETFD, 1);
}
}
#ifdef REMOTE
if (!(gn->type & OP_NOEXPORT) && !(runLocalFirst && nLocal < maxLocal)) {
#ifdef RMT_NO_EXEC
local = !Rmt_Export(shellPath, argv, job);
#else
local = !Rmt_Begin(shellPath, argv, job->node);
#endif /* RMT_NO_EXEC */
if (!local) {
job->flags |= JOB_REMOTE;
}
} else
#endif
local = TRUE;
if (local && (((nLocal >= maxLocal) &&
!(job->flags & JOB_SPECIAL) &&
#ifdef REMOTE
(!(gn->type & OP_NOEXPORT) || (maxLocal != 0))
#else
(maxLocal != 0)
#endif
)))
{
/*
* The job can only be run locally, but we've hit the limit of
* local concurrency, so put the job on hold until some other job
* finishes. Note that the special jobs (.BEGIN, .INTERRUPT and .END)
* may be run locally even when the local limit has been reached
* (e.g. when maxLocal == 0), though they will be exported if at
* all possible. In addition, any target marked with .NOEXPORT will
* be run locally if maxLocal is 0.
*/
job->flags |= JOB_RESTART;
(void) Lst_AtEnd(stoppedJobs, (ClientData)job);
} else {
JobExec(job, argv);
}
return(JOB_RUNNING);
}
static char *
JobOutput(Job *job, char *cp, char *endp, int msg)
{
char *ecp;
if (commandShell->noPrint) {
ecp = Str_FindSubstring(cp, commandShell->noPrint);
while (ecp != NULL) {
if (cp != ecp) {
*ecp = '\0';
if (msg && job->node != lastNode) {
MESSAGE(stdout, job->node);
lastNode = job->node;
}
/*
* The only way there wouldn't be a newline after
* this line is if it were the last in the buffer.
* however, since the non-printable comes after it,
* there must be a newline, so we don't print one.
*/
(void) fprintf(stdout, "%s", cp);
(void) fflush(stdout);
}
cp = ecp + commandShell->noPLen;
if (cp != endp) {
/*
* Still more to print, look again after skipping
* the whitespace following the non-printable
* command....
*/
cp++;
while (*cp == ' ' || *cp == '\t' || *cp == '\n') {
cp++;
}
ecp = Str_FindSubstring(cp, commandShell->noPrint);
} else {
return cp;
}
}
}
return cp;
}
/*-
*-----------------------------------------------------------------------
* JobDoOutput --
* This function is called at different times depending on
* whether the user has specified that output is to be collected
* via pipes or temporary files. In the former case, we are called
* whenever there is something to read on the pipe. We collect more
* output from the given job and store it in the job's outBuf. If
* this makes up a line, we print it tagged by the job's identifier,
* as necessary.
* If output has been collected in a temporary file, we open the
* file and read it line by line, transfering it to our own
* output channel until the file is empty. At which point we
* remove the temporary file.
* In both cases, however, we keep our figurative eye out for the
* 'noPrint' line for the shell from which the output came. If
* we recognize a line, we don't print it. If the command is not
* alone on the line (the character after it is not \0 or \n), we
* do print whatever follows it.
*
* Input:
* job the job whose output needs printing
* finish TRUE if this is the last time we'll be called
* for this job
*
* Results:
* None
*
* Side Effects:
* curPos may be shifted as may the contents of outBuf.
*-----------------------------------------------------------------------
*/
STATIC void
JobDoOutput(Job *job, Boolean finish)
{
Boolean gotNL = FALSE; /* true if got a newline */
Boolean fbuf; /* true if our buffer filled up */
int nr; /* number of bytes read */
int i; /* auxiliary index into outBuf */
int max; /* limit for i (end of current data) */
int nRead; /* (Temporary) number of bytes read */
FILE *oFILE; /* Stream pointer to shell's output file */
char inLine[132];
if (usePipes) {
/*
* Read as many bytes as will fit in the buffer.
*/
end_loop:
gotNL = FALSE;
fbuf = FALSE;
nRead = read(job->inPipe, &job->outBuf[job->curPos],
JOB_BUFSIZE - job->curPos);
if (nRead < 0) {
if (DEBUG(JOB)) {
perror("JobDoOutput(piperead)");
}
nr = 0;
} else {
nr = nRead;
}
/*
* If we hit the end-of-file (the job is dead), we must flush its
* remaining output, so pretend we read a newline if there's any
* output remaining in the buffer.
* Also clear the 'finish' flag so we stop looping.
*/
if ((nr == 0) && (job->curPos != 0)) {
job->outBuf[job->curPos] = '\n';
nr = 1;
finish = FALSE;
} else if (nr == 0) {
finish = FALSE;
}
/*
* Look for the last newline in the bytes we just got. If there is
* one, break out of the loop with 'i' as its index and gotNL set
* TRUE.
*/
max = job->curPos + nr;
for (i = job->curPos + nr - 1; i >= job->curPos; i--) {
if (job->outBuf[i] == '\n') {
gotNL = TRUE;
break;
} else if (job->outBuf[i] == '\0') {
/*
* Why?
*/
job->outBuf[i] = ' ';
}
}
if (!gotNL) {
job->curPos += nr;
if (job->curPos == JOB_BUFSIZE) {
/*
* If we've run out of buffer space, we have no choice
* but to print the stuff. sigh.
*/
fbuf = TRUE;
i = job->curPos;
}
}
if (gotNL || fbuf) {
/*
* Need to send the output to the screen. Null terminate it
* first, overwriting the newline character if there was one.
* So long as the line isn't one we should filter (according
* to the shell description), we print the line, preceded
* by a target banner if this target isn't the same as the
* one for which we last printed something.
* The rest of the data in the buffer are then shifted down
* to the start of the buffer and curPos is set accordingly.
*/
job->outBuf[i] = '\0';
if (i >= job->curPos) {
char *cp;
cp = JobOutput(job, job->outBuf, &job->outBuf[i], FALSE);
/*
* There's still more in that thar buffer. This time, though,
* we know there's no newline at the end, so we add one of
* our own free will.
*/
if (*cp != '\0') {
if (job->node != lastNode) {
MESSAGE(stdout, job->node);
lastNode = job->node;
}
(void) fprintf(stdout, "%s%s", cp, gotNL ? "\n" : "");
(void) fflush(stdout);
}
}
if (i < max - 1) {
/* shift the remaining characters down */
(void) memcpy(job->outBuf, &job->outBuf[i + 1], max - (i + 1));
job->curPos = max - (i + 1);
} else {
/*
* We have written everything out, so we just start over
* from the start of the buffer. No copying. No nothing.
*/
job->curPos = 0;
}
}
if (finish) {
/*
* If the finish flag is true, we must loop until we hit
* end-of-file on the pipe. This is guaranteed to happen
* eventually since the other end of the pipe is now closed
* (we closed it explicitly and the child has exited). When
* we do get an EOF, finish will be set FALSE and we'll fall
* through and out.
*/
goto end_loop;
}
} else {
/*
* We've been called to retrieve the output of the job from the
* temporary file where it's been squirreled away. This consists of
* opening the file, reading the output line by line, being sure not
* to print the noPrint line for the shell we used, then close and
* remove the temporary file. Very simple.
*
* Change to read in blocks and do FindSubString type things as for
* pipes? That would allow for "@echo -n..."
*/
oFILE = fopen(job->outFile, "r");
if (oFILE != NULL) {
(void) fprintf(stdout, "Results of making %s:\n", job->node->name);
(void) fflush(stdout);
while (fgets(inLine, sizeof(inLine), oFILE) != NULL) {
char *cp, *endp, *oendp;
cp = inLine;
oendp = endp = inLine + strlen(inLine);
if (endp[-1] == '\n') {
*--endp = '\0';
}
cp = JobOutput(job, inLine, endp, FALSE);
/*
* There's still more in that thar buffer. This time, though,
* we know there's no newline at the end, so we add one of
* our own free will.
*/
(void) fprintf(stdout, "%s", cp);
(void) fflush(stdout);
if (endp != oendp) {
(void) fprintf(stdout, "\n");
(void) fflush(stdout);
}
}
(void) fclose(oFILE);
(void) eunlink(job->outFile);
} else {
Punt("Cannot open `%s'", job->outFile);
}
}
}
/*-
*-----------------------------------------------------------------------
* Job_CatchChildren --
* Handle the exit of a child. Called from Make_Make.
*
* Input:
* block TRUE if should block on the wait
*
* Results:
* none.
*
* Side Effects:
* The job descriptor is removed from the list of children.
*
* Notes:
* We do waits, blocking or not, according to the wisdom of our
* caller, until there are no more children to report. For each
* job, call JobFinish to finish things off. This will take care of
* putting jobs on the stoppedJobs queue.
*
*-----------------------------------------------------------------------
*/
void
Job_CatchChildren(Boolean block)
{
int pid; /* pid of dead child */
Job *job; /* job descriptor for dead child */
LstNode jnode; /* list element for finding job */
int status; /* Exit/termination status */
/*
* Don't even bother if we know there's no one around.
*/
if (nLocal == 0) {
return;
}
while ((pid = waitpid((pid_t) -1, &status,
(block?0:WNOHANG)|WUNTRACED)) > 0)
{
if (DEBUG(JOB)) {
(void) fprintf(stdout, "Process %d exited or stopped %x.\n", pid,
status);
(void) fflush(stdout);
}
jnode = Lst_Find(jobs, (ClientData)&pid, JobCmpPid);
if (jnode == NILLNODE) {
if (WIFSTOPPED(status) && (WSTOPSIG(status) == SIGCONT)) {
jnode = Lst_Find(stoppedJobs, (ClientData) &pid, JobCmpPid);
if (jnode == NILLNODE) {
Error("Resumed child (%d) not in table", pid);
continue;
}
job = (Job *)Lst_Datum(jnode);
(void) Lst_Remove(stoppedJobs, jnode);
} else {
Error("Child (%d) not in table?", pid);
continue;
}
} else {
job = (Job *) Lst_Datum(jnode);
(void) Lst_Remove(jobs, jnode);
nJobs -= 1;
#ifdef REMOTE
if (!(job->flags & JOB_REMOTE)) {
if (DEBUG(JOB)) {
(void) fprintf(stdout,
"Job queue has one fewer local process.\n");
(void) fflush(stdout);
}
nLocal -= 1;
}
#else
nLocal -= 1;
#endif
}
JobFinish(job, &status);
}
}
/*-
*-----------------------------------------------------------------------
* Job_CatchOutput --
* Catch the output from our children, if we're using
* pipes do so. Otherwise just block time until we get a
* signal (most likely a SIGCHLD) since there's no point in
* just spinning when there's nothing to do and the reaping
* of a child can wait for a while.
*
* Results:
* None
*
* Side Effects:
* Output is read from pipes if we're piping.
* -----------------------------------------------------------------------
*/
void
Job_CatchOutput(void)
{
int nready;
LstNode ln;
Job *job;
#ifdef RMT_WILL_WATCH
int pnJobs; /* Previous nJobs */
#endif
(void) fflush(stdout);
Job_TokenFlush();
#ifdef RMT_WILL_WATCH
pnJobs = nJobs;
/*
* It is possible for us to be called with nJobs equal to 0. This happens
* if all the jobs finish and a job that is stopped cannot be run
* locally (eg if maxLocal is 0) and cannot be exported. The job will
* be placed back on the stoppedJobs queue, Job_Empty() will return false,
* Make_Run will call us again when there's nothing for which to wait.
* nJobs never changes, so we loop forever. Hence the check. It could
* be argued that we should sleep for a bit so as not to swamp the
* exportation system with requests. Perhaps we should.
*
* NOTE: IT IS THE RESPONSIBILITY OF Rmt_Wait TO CALL Job_CatchChildren
* IN A TIMELY FASHION TO CATCH ANY LOCALLY RUNNING JOBS THAT EXIT.
* It may use the variable nLocal to determine if it needs to call
* Job_CatchChildren (if nLocal is 0, there's nothing for which to
* wait...)
*/
while (nJobs != 0 && pnJobs == nJobs) {
Rmt_Wait();
}
#else
if (usePipes) {
if ((nready = poll((wantToken ? fds : (fds + 1)),
(wantToken ? nfds : (nfds - 1)), POLL_MSEC)) <= 0) {
return;
} else {
sigset_t mask;
JobSigLock(&mask);
if (Lst_Open(jobs) == FAILURE) {
Punt("Cannot open job table");
}
if (readyfd(&childExitJob)) {
char token;
(void) read(childExitJob.inPipe, &token, 1);
nready -= 1;
}
while (nready && (ln = Lst_Next(jobs)) != NILLNODE) {
job = (Job *) Lst_Datum(ln);
if (readyfd(job)) {
JobDoOutput(job, FALSE);
nready -= 1;
}
}
Lst_Close(jobs);
JobSigUnlock(&mask);
}
}
#endif /* RMT_WILL_WATCH */
}
/*-
*-----------------------------------------------------------------------
* Job_Make --
* Start the creation of a target. Basically a front-end for
* JobStart used by the Make module.
*
* Results:
* None.
*
* Side Effects:
* Another job is started.
*
*-----------------------------------------------------------------------
*/
void
Job_Make(GNode *gn)
{
(void) JobStart(gn, 0, NULL);
}
void
Shell_Init()
{
if (shellPath == NULL) {
/*
* The user didn't specify a shell to use, so we are using the
* default one... Both the absolute path and the last component
* must be set. The last component is taken from the 'name' field
* of the default shell description pointed-to by commandShell.
* All default shells are located in _PATH_DEFSHELLDIR.
*/
shellName = commandShell->name;
shellPath = str_concat(_PATH_DEFSHELLDIR, shellName, STR_ADDSLASH);
}
if (commandShell->exit == NULL) {
commandShell->exit = "";
}
if (commandShell->echo == NULL) {
commandShell->echo = "";
}
}
/*-
*-----------------------------------------------------------------------
* Job_Init --
* Initialize the process module
*
* Input:
* maxproc the greatest number of jobs which may be running
* at one time
* maxlocal the greatest number of jobs which may be running
* at once
*
* Results:
* none
*
* Side Effects:
* lists and counters are initialized
*-----------------------------------------------------------------------
*/
void
Job_Init(int maxproc, int maxlocal)
{
GNode *begin; /* node for commands to do at the very start */
jobs = Lst_Init(FALSE);
stoppedJobs = Lst_Init(FALSE);
maxJobs = maxproc;
maxLocal = maxlocal;
nJobs = 0;
nLocal = 0;
wantToken = FALSE;
aborting = 0;
errors = 0;
lastNode = NILGNODE;
if (maxJobs == 1
#ifdef REMOTE
|| noMessages
#endif
) {
/*
* If only one job can run at a time, there's no need for a banner,
* is there?
*/
targFmt = "";
} else {
targFmt = TARG_FMT;
}
Shell_Init();
if (pipe(exit_pipe) < 0)
Fatal("error in pipe: %s", strerror(errno));
fcntl(exit_pipe[0], F_SETFD, 1);
fcntl(exit_pipe[1], F_SETFD, 1);
childExitJob.inPipe = exit_pipe[0];
sigemptyset(&caught_signals);
/*
* Install a SIGCHLD handler.
*/
(void)signal(SIGCHLD, JobChildSig);
sigaddset(&caught_signals, SIGCHLD);
#define ADDSIG(s,h) \
if (signal(s, SIG_IGN) != SIG_IGN) { \
sigaddset(&caught_signals, s); \
(void) signal(s, h); \
}
/*
* Catch the four signals that POSIX specifies if they aren't ignored.
* JobPassSig will take care of calling JobInterrupt if appropriate.
*/
ADDSIG(SIGINT, JobPassSig)
ADDSIG(SIGHUP, JobPassSig)
ADDSIG(SIGTERM, JobPassSig)
ADDSIG(SIGQUIT, JobPassSig)
/*
* There are additional signals that need to be caught and passed if
* either the export system wants to be told directly of signals or if
* we're giving each job its own process group (since then it won't get
* signals from the terminal driver as we own the terminal)
*/
#if defined(RMT_WANTS_SIGNALS) || defined(USE_PGRP)
ADDSIG(SIGTSTP, JobPassSig)
ADDSIG(SIGTTOU, JobPassSig)
ADDSIG(SIGTTIN, JobPassSig)
ADDSIG(SIGWINCH, JobPassSig)
ADDSIG(SIGCONT, JobContinueSig)
#endif
#undef ADDSIG
begin = Targ_FindNode(".BEGIN", TARG_NOCREATE);
if (begin != NILGNODE) {
JobStart(begin, JOB_SPECIAL, (Job *)0);
while (nJobs) {
Job_CatchOutput();
#ifndef RMT_WILL_WATCH
Job_CatchChildren(!usePipes);
#endif /* RMT_WILL_WATCH */
}
}
postCommands = Targ_FindNode(".END", TARG_CREATE);
}
static void JobSigReset(void)
{
#define DELSIG(s) \
if (sigismember(&caught_signals, s)) { \
(void) signal(SIGINT, SIG_DFL); \
}
DELSIG(SIGINT)
DELSIG(SIGHUP)
DELSIG(SIGQUIT)
DELSIG(SIGTERM)
#if defined(RMT_WANTS_SIGNALS) || defined(USE_PGRP)
DELSIG(SIGTSTP)
DELSIG(SIGTTOU)
DELSIG(SIGTTIN)
DELSIG(SIGWINCH)
DELSIG(SIGCONT)
#endif
#undef DELSIG
(void)signal(SIGCHLD, SIG_DFL);
}
/*-
*-----------------------------------------------------------------------
* Job_Empty --
* See if the job table is empty. Because the local concurrency may
* be set to 0, it is possible for the job table to become empty,
* while the list of stoppedJobs remains non-empty. In such a case,
* we want to restart as many jobs as we can.
*
* Results:
* TRUE if it is. FALSE if it ain't.
*
* Side Effects:
* None.
*
* -----------------------------------------------------------------------
*/
Boolean
Job_Empty(void)
{
if (nJobs == 0) {
if (!Lst_IsEmpty(stoppedJobs) && !aborting) {
/*
* The job table is obviously not full if it has no jobs in
* it...Try and restart the stopped jobs.
*/
JobRestartJobs();
return(FALSE);
} else {
return(TRUE);
}
} else {
return(FALSE);
}
}
/*-
*-----------------------------------------------------------------------
* JobMatchShell --
* Find a shell in 'shells' given its name.
*
* Results:
* A pointer to the Shell structure.
*
* Side Effects:
* None.
*
*-----------------------------------------------------------------------
*/
static Shell *
JobMatchShell(const char *name)
{
Shell *sh;
for (sh = shells; sh->name != NULL; sh++) {
if (strcmp(name, sh->name) == 0)
return (sh);
}
return (NULL);
}
/*-
*-----------------------------------------------------------------------
* Job_ParseShell --
* Parse a shell specification and set up commandShell, shellPath
* and shellName appropriately.
*
* Input:
* line The shell spec
*
* Results:
* FAILURE if the specification was incorrect.
*
* Side Effects:
* commandShell points to a Shell structure (either predefined or
* created from the shell spec), shellPath is the full path of the
* shell described by commandShell, while shellName is just the
* final component of shellPath.
*
* Notes:
* A shell specification consists of a .SHELL target, with dependency
* operator, followed by a series of blank-separated words. Double
* quotes can be used to use blanks in words. A backslash escapes
* anything (most notably a double-quote and a space) and
* provides the functionality it does in C. Each word consists of
* keyword and value separated by an equal sign. There should be no
* unnecessary spaces in the word. The keywords are as follows:
* name Name of shell.
* path Location of shell.
* quiet Command to turn off echoing.
* echo Command to turn echoing on
* filter Result of turning off echoing that shouldn't be
* printed.
* echoFlag Flag to turn echoing on at the start
* errFlag Flag to turn error checking on at the start
* hasErrCtl True if shell has error checking control
* check Command to turn on error checking if hasErrCtl
* is TRUE or template of command to echo a command
* for which error checking is off if hasErrCtl is
* FALSE.
* ignore Command to turn off error checking if hasErrCtl
* is TRUE or template of command to execute a
* command so as to ignore any errors it returns if
* hasErrCtl is FALSE.
*
*-----------------------------------------------------------------------
*/
ReturnStatus
Job_ParseShell(char *line)
{
char **words;
char **argv;
int argc;
char *path;
Shell newShell;
Boolean fullSpec = FALSE;
Shell *sh;
while (isspace((unsigned char)*line)) {
line++;
}
if (shellArgv)
free(UNCONST(shellArgv));
memset((Address)&newShell, 0, sizeof(newShell));
/*
* Parse the specification by keyword
*/
words = brk_string(line, &argc, TRUE, &path);
shellArgv = path;
for (path = NULL, argv = words; argc != 0; argc--, argv++) {
if (strncmp(*argv, "path=", 5) == 0) {
path = &argv[0][5];
} else if (strncmp(*argv, "name=", 5) == 0) {
newShell.name = &argv[0][5];
} else {
if (strncmp(*argv, "quiet=", 6) == 0) {
newShell.echoOff = &argv[0][6];
} else if (strncmp(*argv, "echo=", 5) == 0) {
newShell.echoOn = &argv[0][5];
} else if (strncmp(*argv, "filter=", 7) == 0) {
newShell.noPrint = &argv[0][7];
newShell.noPLen = strlen(newShell.noPrint);
} else if (strncmp(*argv, "echoFlag=", 9) == 0) {
newShell.echo = &argv[0][9];
} else if (strncmp(*argv, "errFlag=", 8) == 0) {
newShell.exit = &argv[0][8];
} else if (strncmp(*argv, "hasErrCtl=", 10) == 0) {
char c = argv[0][10];
newShell.hasErrCtl = !((c != 'Y') && (c != 'y') &&
(c != 'T') && (c != 't'));
} else if (strncmp(*argv, "check=", 6) == 0) {
newShell.errCheck = &argv[0][6];
} else if (strncmp(*argv, "ignore=", 7) == 0) {
newShell.ignErr = &argv[0][7];
} else if (strncmp(*argv, "errout=", 7) == 0) {
newShell.errOut = &argv[0][7];
} else if (strncmp(*argv, "comment=", 8) == 0) {
newShell.commentChar = argv[0][8];
} else {
Parse_Error(PARSE_FATAL, "Unknown keyword \"%s\"",
*argv);
free(words);
return(FAILURE);
}
fullSpec = TRUE;
}
}
if (path == NULL) {
/*
* If no path was given, the user wants one of the pre-defined shells,
* yes? So we find the one s/he wants with the help of JobMatchShell
* and set things up the right way. shellPath will be set up by
* Job_Init.
*/
if (newShell.name == NULL) {
Parse_Error(PARSE_FATAL, "Neither path nor name specified");
free(words);
return(FAILURE);
} else {
if ((sh = JobMatchShell(newShell.name)) == NULL) {
Parse_Error(PARSE_WARNING, "%s: No matching shell",
newShell.name);
free(words);
return(FAILURE);
}
commandShell = sh;
shellName = newShell.name;
}
} else {
/*
* The user provided a path. If s/he gave nothing else (fullSpec is
* FALSE), try and find a matching shell in the ones we know of.
* Else we just take the specification at its word and copy it
* to a new location. In either case, we need to record the
* path the user gave for the shell.
*/
shellPath = path;
path = strrchr(path, '/');
if (path == NULL) {
path = UNCONST(shellPath);
} else {
path += 1;
}
if (newShell.name != NULL) {
shellName = newShell.name;
} else {
shellName = path;
}
if (!fullSpec) {
if ((sh = JobMatchShell(shellName)) == NULL) {
Parse_Error(PARSE_WARNING, "%s: No matching shell",
shellName);
free(words);
return(FAILURE);
}
commandShell = sh;
} else {
commandShell = (Shell *) emalloc(sizeof(Shell));
*commandShell = newShell;
}
}
if (commandShell->echoOn && commandShell->echoOff) {
commandShell->hasEchoCtl = TRUE;
}
if (!commandShell->hasErrCtl) {
if (commandShell->errCheck == NULL) {
commandShell->errCheck = "";
}
if (commandShell->ignErr == NULL) {
commandShell->ignErr = "%s\n";
}
}
/*
* Do not free up the words themselves, since they might be in use by the
* shell specification.
*/
free(words);
return SUCCESS;
}
/*-
*-----------------------------------------------------------------------
* JobInterrupt --
* Handle the receipt of an interrupt.
*
* Input:
* runINTERRUPT Non-zero if commands for the .INTERRUPT target
* should be executed
* signo signal received
*
* Results:
* None
*
* Side Effects:
* All children are killed. Another job will be started if the
* .INTERRUPT target was given.
*-----------------------------------------------------------------------
*/
static void
JobInterrupt(int runINTERRUPT, int signo)
{
LstNode ln; /* element in job table */
Job *job; /* job descriptor in that element */
GNode *interrupt; /* the node describing the .INTERRUPT target */
sigset_t mask;
aborting = ABORT_INTERRUPT;
JobSigLock(&mask);
(void) Lst_Open(jobs);
while ((ln = Lst_Next(jobs)) != NILLNODE) {
GNode *gn;
job = (Job *) Lst_Datum(ln);
gn = job->node;
if ((gn->type & (OP_JOIN|OP_PHONY)) == 0 && !Targ_Precious(gn)) {
char *file = (gn->path == NULL ? gn->name : gn->path);
if (!noExecute && eunlink(file) != -1) {
Error("*** %s removed", file);
}
}
#ifdef RMT_WANTS_SIGNALS
if (job->flags & JOB_REMOTE) {
/*
* If job is remote, let the Rmt module do the killing.
*/
if (!Rmt_Signal(job, signo)) {
/*
* If couldn't kill the thing, finish it out now with an
* error code, since no exit report will come in likely.
*/
int status;
status.w_status = 0;
status.w_retcode = 1;
JobFinish(job, &status);
}
} else if (job->pid) {
KILL(job->pid, signo);
}
#else
if (job->pid) {
if (DEBUG(JOB)) {
(void) fprintf(stdout,
"JobInterrupt passing signal %d to child %d.\n",
signo, job->pid);
(void) fflush(stdout);
}
KILL(job->pid, signo);
}
#endif /* RMT_WANTS_SIGNALS */
}
Lst_Close(jobs);
#ifdef REMOTE
(void)Lst_Open(stoppedJobs);
while ((ln = Lst_Next(stoppedJobs)) != NILLNODE) {
GNode *gn;
job = (Job *) Lst_Datum(ln);
gn = job->node;
if (job->flags & JOB_RESTART) {
if (DEBUG(JOB)) {
(void) fprintf(stdout, "%s%s",
"JobInterrupt skipping job on stopped queue",
"-- it was waiting to be restarted.\n");
(void) fflush(stdout);
}
continue;
}
if ((gn->type & (OP_JOIN|OP_PHONY)) == 0 && !Targ_Precious(gn)) {
char *file = (gn->path == NULL ? gn->name : gn->path);
if (eunlink(file) == 0) {
Error("*** %s removed", file);
}
}
/*
* Resume the thing so it will take the signal.
*/
if (DEBUG(JOB)) {
(void) fprintf(stdout,
"JobInterrupt passing CONT to stopped child %d.\n",
job->pid);
(void) fflush(stdout);
}
KILL(job->pid, SIGCONT);
#ifdef RMT_WANTS_SIGNALS
if (job->flags & JOB_REMOTE) {
/*
* If job is remote, let the Rmt module do the killing.
*/
if (!Rmt_Signal(job, SIGINT)) {
/*
* If couldn't kill the thing, finish it out now with an
* error code, since no exit report will come in likely.
*/
int status;
status.w_status = 0;
status.w_retcode = 1;
JobFinish(job, &status);
}
} else if (job->pid) {
if (DEBUG(JOB)) {
(void) fprintf(stdout,
"JobInterrupt passing interrupt to stopped child %d.\n",
job->pid);
(void) fflush(stdout);
}
KILL(job->pid, SIGINT);
}
#endif /* RMT_WANTS_SIGNALS */
}
Lst_Close(stoppedJobs);
#endif /* REMOTE */
JobSigUnlock(&mask);
if (runINTERRUPT && !touchFlag) {
interrupt = Targ_FindNode(".INTERRUPT", TARG_NOCREATE);
if (interrupt != NILGNODE) {
ignoreErrors = FALSE;
JobStart(interrupt, JOB_IGNDOTS, (Job *)0);
while (nJobs) {
Job_CatchOutput();
#ifndef RMT_WILL_WATCH
Job_CatchChildren(!usePipes);
#endif /* RMT_WILL_WATCH */
}
}
}
Trace_Log(MAKEINTR, 0);
exit(signo);
}
/*
*-----------------------------------------------------------------------
* Job_Finish --
* Do final processing such as the running of the commands
* attached to the .END target.
*
* Results:
* Number of errors reported.
*
* Side Effects:
* None.
*-----------------------------------------------------------------------
*/
int
Job_Finish(void)
{
if (postCommands != NILGNODE && !Lst_IsEmpty(postCommands->commands)) {
if (errors) {
Error("Errors reported so .END ignored");
} else {
JobStart(postCommands, JOB_SPECIAL | JOB_IGNDOTS, NULL);
while (nJobs) {
Job_CatchOutput();
#ifndef RMT_WILL_WATCH
Job_CatchChildren(!usePipes);
#endif /* RMT_WILL_WATCH */
}
}
}
Job_TokenFlush();
return(errors);
}
/*-
*-----------------------------------------------------------------------
* Job_End --
* Cleanup any memory used by the jobs module
*
* Results:
* None.
*
* Side Effects:
* Memory is freed
*-----------------------------------------------------------------------
*/
void
Job_End(void)
{
#ifdef CLEANUP
if (shellArgv)
free(shellArgv);
#endif
}
/*-
*-----------------------------------------------------------------------
* Job_Wait --
* Waits for all running jobs to finish and returns. Sets 'aborting'
* to ABORT_WAIT to prevent other jobs from starting.
*
* Results:
* None.
*
* Side Effects:
* Currently running jobs finish.
*
*-----------------------------------------------------------------------
*/
void
Job_Wait(void)
{
aborting = ABORT_WAIT;
while (nJobs != 0) {
Job_CatchOutput();
#ifndef RMT_WILL_WATCH
Job_CatchChildren(!usePipes);
#endif /* RMT_WILL_WATCH */
}
Job_TokenFlush();
aborting = 0;
}
/*-
*-----------------------------------------------------------------------
* Job_AbortAll --
* Abort all currently running jobs without handling output or anything.
* This function is to be called only in the event of a major
* error. Most definitely NOT to be called from JobInterrupt.
*
* Results:
* None
*
* Side Effects:
* All children are killed, not just the firstborn
*-----------------------------------------------------------------------
*/
void
Job_AbortAll(void)
{
LstNode ln; /* element in job table */
Job *job; /* the job descriptor in that element */
int foo;
sigset_t mask;
aborting = ABORT_ERROR;
if (nJobs) {
JobSigLock(&mask);
(void) Lst_Open(jobs);
while ((ln = Lst_Next(jobs)) != NILLNODE) {
job = (Job *) Lst_Datum(ln);
/*
* kill the child process with increasingly drastic signals to make
* darn sure it's dead.
*/
#ifdef RMT_WANTS_SIGNALS
if (job->flags & JOB_REMOTE) {
Rmt_Signal(job, SIGINT);
Rmt_Signal(job, SIGKILL);
} else {
KILL(job->pid, SIGINT);
KILL(job->pid, SIGKILL);
}
#else
KILL(job->pid, SIGINT);
KILL(job->pid, SIGKILL);
#endif /* RMT_WANTS_SIGNALS */
}
Lst_Close(jobs);
JobSigUnlock(&mask);
}
/*
* Catch as many children as want to report in at first, then give up
*/
while (waitpid((pid_t) -1, &foo, WNOHANG) > 0)
continue;
}
#ifdef REMOTE
/*-
*-----------------------------------------------------------------------
* JobFlagForMigration --
* Handle the eviction of a child. Called from RmtStatusChange.
* Flags the child as remigratable and then suspends it.
*
* Input:
* hostID ID of host we used, for matching children
*
* Results:
* none.
*
* Side Effects:
* The job descriptor is flagged for remigration.
*
*-----------------------------------------------------------------------
*/
void
JobFlagForMigration(int hostID)
{
Job *job; /* job descriptor for dead child */
LstNode jnode; /* list element for finding job */
if (DEBUG(JOB)) {
(void) fprintf(stdout, "JobFlagForMigration(%d) called.\n", hostID);
(void) fflush(stdout);
}
jnode = Lst_Find(jobs, (ClientData)&hostID, JobCmpRmtID);
if (jnode == NILLNODE) {
jnode = Lst_Find(stoppedJobs, (ClientData)hostID, JobCmpRmtID);
if (jnode == NILLNODE) {
if (DEBUG(JOB)) {
Error("Evicting host(%d) not in table", hostID);
}
return;
}
}
job = (Job *) Lst_Datum(jnode);
if (DEBUG(JOB)) {
(void) fprintf(stdout,
"JobFlagForMigration(%d) found job '%s'.\n", hostID,
job->node->name);
(void) fflush(stdout);
}
KILL(job->pid, SIGSTOP);
job->flags |= JOB_REMIGRATE;
}
#endif
/*-
*-----------------------------------------------------------------------
* JobRestartJobs --
* Tries to restart stopped jobs if there are slots available.
* Note that this tries to restart them regardless of pending errors.
* It's not good to leave stopped jobs lying around!
*
* Results:
* None.
*
* Side Effects:
* Resumes(and possibly migrates) jobs.
*
*-----------------------------------------------------------------------
*/
static void
JobRestartJobs(void)
{
sigset_t mask;
JobSigLock(&mask);
while (!Lst_IsEmpty(stoppedJobs)) {
if (DEBUG(JOB)) {
(void) fprintf(stdout, "Restarting a stopped job.\n");
(void) fflush(stdout);
}
if (JobRestart((Job *)Lst_DeQueue(stoppedJobs)) != 0)
break;
}
JobSigUnlock(&mask);
}
#ifndef RMT_WILL_WATCH
static void
watchfd(Job *job)
{
int i;
if (job->inPollfd != NULL)
Punt("Watching watched job");
if (fds == NULL) {
maxfds = JBSTART;
fds = emalloc(sizeof(struct pollfd) * maxfds);
jobfds = emalloc(sizeof(Job **) * maxfds);
fds[0].fd = job_pipe[0];
fds[0].events = POLLIN;
jobfds[0] = &tokenWaitJob;
tokenWaitJob.inPollfd = &fds[0];
nfds++;
fds[1].fd = exit_pipe[0];
fds[1].events = POLLIN;
jobfds[1] = &childExitJob;
childExitJob.inPollfd = &fds[1];
nfds++;
} else if (nfds == maxfds) {
maxfds *= JBFACTOR;
fds = erealloc(fds, sizeof(struct pollfd) * maxfds);
jobfds = erealloc(jobfds, sizeof(Job **) * maxfds);
for (i = 0; i < nfds; i++)
jobfds[i]->inPollfd = &fds[i];
}
fds[nfds].fd = job->inPipe;
fds[nfds].events = POLLIN;
jobfds[nfds] = job;
job->inPollfd = &fds[nfds];
nfds++;
}
static void
clearfd(Job *job)
{
int i;
if (job->inPollfd == NULL)
Punt("Unwatching unwatched job");
i = job->inPollfd - fds;
nfds--;
/*
* Move last job in table into hole made by dead job.
*/
if (nfds != i) {
fds[i] = fds[nfds];
jobfds[i] = jobfds[nfds];
jobfds[i]->inPollfd = &fds[i];
}
job->inPollfd = NULL;
}
static int
readyfd(Job *job)
{
if (job->inPollfd == NULL)
Punt("Polling unwatched job");
return (job->inPollfd->revents & POLLIN) != 0;
}
#endif
/*-
*-----------------------------------------------------------------------
* JobTokenAdd --
* Put a token into the job pipe so that some make process can start
* another job.
*
* Side Effects:
* Allows more build jobs to be spawned somewhere.
*
*-----------------------------------------------------------------------
*/
static void
JobTokenAdd(void)
{
if (DEBUG(JOB))
printf("deposit token\n");
write(job_pipe[1], "+", 1);
}
/*-
*-----------------------------------------------------------------------
* Job_ServerStartTokenAdd --
* Prep the job token pipe in the root make process.
*
*-----------------------------------------------------------------------
*/
void
Job_ServerStart(int maxproc)
{
int i, flags;
char jobarg[64];
if (pipe(job_pipe) < 0)
Fatal ("error in pipe: %s", strerror(errno));
/*
* We mark the input side of the pipe non-blocking; we poll(2) the
* pipe when we're waiting for a job token, but we might lose the
* race for the token when a new one becomes available, so the read
* from the pipe should not block.
*/
flags = fcntl(job_pipe[0], F_GETFL, 0);
flags |= O_NONBLOCK;
fcntl(job_pipe[0], F_SETFL, flags);
/*
* Mark job pipes as close-on-exec.
* Note that we will clear this when executing submakes.
*/
fcntl(job_pipe[0], F_SETFD, 1);
fcntl(job_pipe[1], F_SETFD, 1);
snprintf(jobarg, sizeof(jobarg), "%d,%d", job_pipe[0], job_pipe[1]);
Var_Append(MAKEFLAGS, "-J", VAR_GLOBAL);
Var_Append(MAKEFLAGS, jobarg, VAR_GLOBAL);
/*
* Preload job_pipe with one token per job, save the one
* "extra" token for the primary job.
*
* XXX should clip maxJobs against PIPE_BUF -- if maxJobs is
* larger than the write buffer size of the pipe, we will
* deadlock here.
*/
for (i=1; i < maxproc; i++)
JobTokenAdd();
}
/*
* this tracks the number of tokens currently "out" to build jobs.
*/
int jobTokensRunning = 0;
int jobTokensFree = 0;
/*-
*-----------------------------------------------------------------------
* Job_TokenReturn --
* Return a withdrawn token to the pool.
*
*-----------------------------------------------------------------------
*/
void
Job_TokenReturn(void)
{
jobTokensRunning--;
if (jobTokensRunning < 0)
Punt("token botch");
if (jobTokensRunning)
jobTokensFree++;
}
/*-
*-----------------------------------------------------------------------
* Job_TokenWithdraw --
* Attempt to withdraw a token from the pool.
*
* Results:
* Returns TRUE if a token was withdrawn, and FALSE if the pool
* is currently empty.
*
* Side Effects:
* If pool is empty, set wantToken so that we wake up
* when a token is released.
*
*-----------------------------------------------------------------------
*/
Boolean
Job_TokenWithdraw(void)
{
char tok;
int count;
wantToken = FALSE;
if (aborting)
return FALSE;
if (jobTokensRunning == 0) {
if (DEBUG(JOB))
printf("first one's free\n");
jobTokensRunning++;
return TRUE;
}
if (jobTokensFree > 0) {
jobTokensFree--;
jobTokensRunning++;
return TRUE;
}
count = read(job_pipe[0], &tok, 1);
if (count == 0)
Fatal("eof on job pipe!");
else if (count < 0) {
if (errno != EAGAIN) {
Fatal("job pipe read: %s", strerror(errno));
}
if (DEBUG(JOB))
printf("blocked for token\n");
wantToken = TRUE;
return FALSE;
}
jobTokensRunning++;
if (DEBUG(JOB))
printf("withdrew token\n");
return TRUE;
}
/*-
*-----------------------------------------------------------------------
* Job_TokenFlush --
* Return free tokens to the pool.
*
*-----------------------------------------------------------------------
*/
void
Job_TokenFlush(void)
{
if (compatMake) return;
while (jobTokensFree > 0) {
JobTokenAdd();
jobTokensFree--;
}
}
#ifdef USE_SELECT
int
emul_poll(struct pollfd *fd, int nfd, int timeout)
{
fd_set rfds, wfds;
int i, maxfd, nselect, npoll;
struct timeval tv, *tvp;
long usecs;
FD_ZERO(&rfds);
FD_ZERO(&wfds);
maxfd = -1;
for (i = 0; i < nfd; i++) {
fd[i].revents = 0;
if (fd[i].events & POLLIN)
FD_SET(fd[i].fd, &rfds);
if (fd[i].events & POLLOUT)
FD_SET(fd[i].fd, &wfds);
if (fd[i].fd > maxfd)
maxfd = fd[i].fd;
}
if (maxfd >= FD_SETSIZE) {
Punt("Ran out of fd_set slots; "
"recompile with a larger FD_SETSIZE.");
}
if (timeout < 0) {
tvp = NULL;
} else {
usecs = timeout * 1000;
tv.tv_sec = usecs / 1000000;
tv.tv_usec = usecs % 1000000;
tvp = &tv;
}
nselect = select(maxfd + 1, &rfds, &wfds, 0, tvp);
if (nselect <= 0)
return nselect;
npoll = 0;
for (i = 0; i < nfd; i++) {
if (FD_ISSET(fd[i].fd, &rfds))
fd[i].revents |= POLLIN;
if (FD_ISSET(fd[i].fd, &wfds))
fd[i].revents |= POLLOUT;
if (fd[i].revents)
npoll++;
}
return npoll;
}
#endif /* USE_SELECT */
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