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entries, so allocate at startup. Use an 'int jobPipe[2]' within the job structure, and create pipes directly into it. Common up the code that creates all the pipes - making them all non-block on the read side in the process. Call Job_CatchChildren() directly from Job_CatchOutput() so that it only gets called when a child actually exits. NB: Something causes a 'pregnant pause' if (for example) you call 'nbmake obj' in src/tools. Introduced between netbsd 3 and 4.
263 lines
10 KiB
C
263 lines
10 KiB
C
/* $NetBSD: job.h,v 1.33 2006/10/11 07:01:44 dsl Exp $ */
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/*
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* Copyright (c) 1988, 1989, 1990 The Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Adam de Boor.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: @(#)job.h 8.1 (Berkeley) 6/6/93
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*/
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/*
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* Copyright (c) 1988, 1989 by Adam de Boor
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* Copyright (c) 1989 by Berkeley Softworks
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Adam de Boor.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: @(#)job.h 8.1 (Berkeley) 6/6/93
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*/
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/*-
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* job.h --
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* Definitions pertaining to the running of jobs in parallel mode.
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*/
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#ifndef _JOB_H_
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#define _JOB_H_
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#define TMPPAT "/tmp/makeXXXXXX"
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#ifdef USE_SELECT
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/*
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* Emulate poll() in terms of select(). This is not a complete
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* emulation but it is sufficient for make's purposes.
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*/
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#define poll emul_poll
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#define pollfd emul_pollfd
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struct emul_pollfd {
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int fd;
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short events;
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short revents;
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};
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#define POLLIN 0x0001
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#define POLLOUT 0x0004
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int
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emul_poll(struct pollfd *fd, int nfd, int timeout);
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#endif
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/*
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* The POLL_MSEC constant determines the maximum number of milliseconds spent
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* in poll before coming out to see if a child has finished.
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*/
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#define POLL_MSEC 5000
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/*-
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* Job Table definitions.
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*
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* Each job has several things associated with it:
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* 1) The process id of the child shell
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* 2) The graph node describing the target being made by this job
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* 3) A LstNode for the first command to be saved after the job
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* completes. This is NILLNODE if there was no "..." in the job's
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* commands.
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* 4) An FILE* for writing out the commands. This is only
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* used before the job is actually started.
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* 5) The output is being caught via a pipe and
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* the descriptors of our pipe, an array in which output is line
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* buffered and the current position in that buffer are all
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* maintained for each job.
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* 6) A word of flags which determine how the module handles errors,
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* echoing, etc. for the job
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*
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* When a job is finished, the Make_Update function is called on each of the
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* parents of the node which was just remade. This takes care of the upward
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* traversal of the dependency graph.
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*/
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struct pollfd;
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#define JOB_BUFSIZE 1024
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typedef struct Job {
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int pid; /* The child's process ID */
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GNode *node; /* The target the child is making */
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LstNode tailCmds; /* The node of the first command to be
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* saved when the job has been run */
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FILE *cmdFILE; /* When creating the shell script, this is
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* where the commands go */
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int exit_status; /* from wait4() in signal handler */
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char job_state; /* status of the job entry */
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#define JOB_ST_FREE 0 /* Job is available */
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#define JOB_ST_SETUP 1 /* Job is allocated but otherwise invalid */
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#define JOB_ST_RUNNING 3 /* Job is running, pid valid */
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#define JOB_ST_FINISHED 4 /* Job is done (ie after SIGCHILD) */
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char job_suspended;
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short flags; /* Flags to control treatment of job */
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#define JOB_IGNERR 0x001 /* Ignore non-zero exits */
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#define JOB_SILENT 0x002 /* no output */
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#define JOB_SPECIAL 0x004 /* Target is a special one. i.e. run it locally
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* if we can't export it and maxLocal is 0 */
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#define JOB_IGNDOTS 0x008 /* Ignore "..." lines when processing
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* commands */
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#define JOB_TRACED 0x400 /* we've sent 'set -x' */
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int jobPipe[2]; /* Pipe for readind output from job */
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struct pollfd *inPollfd; /* pollfd associated with inPipe */
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char outBuf[JOB_BUFSIZE + 1];
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/* Buffer for storing the output of the
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* job, line by line */
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int curPos; /* Current position in op_outBuf */
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} Job;
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#define inPipe jobPipe[0]
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#define outPipe jobPipe[1]
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/*-
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* Shell Specifications:
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* Each shell type has associated with it the following information:
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* 1) The string which must match the last character of the shell name
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* for the shell to be considered of this type. The longest match
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* wins.
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* 2) A command to issue to turn off echoing of command lines
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* 3) A command to issue to turn echoing back on again
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* 4) What the shell prints, and its length, when given the echo-off
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* command. This line will not be printed when received from the shell
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* 5) A boolean to tell if the shell has the ability to control
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* error checking for individual commands.
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* 6) The string to turn this checking on.
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* 7) The string to turn it off.
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* 8) The command-flag to give to cause the shell to start echoing
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* commands right away.
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* 9) The command-flag to cause the shell to Lib_Exit when an error is
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* detected in one of the commands.
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*
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* Some special stuff goes on if a shell doesn't have error control. In such
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* a case, errCheck becomes a printf template for echoing the command,
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* should echoing be on and ignErr becomes another printf template for
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* executing the command while ignoring the return status. Finally errOut
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* is a printf template for running the command and causing the shell to
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* exit on error. If any of these strings are empty when hasErrCtl is FALSE,
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* the command will be executed anyway as is and if it causes an error, so be
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* it. Any templates setup to echo the command will escape any '$ ` \ "'i
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* characters in the command string to avoid common problems with
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* echo "%s\n" as a template.
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*/
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typedef struct Shell {
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const char *name; /* the name of the shell. For Bourne and C
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* shells, this is used only to find the
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* shell description when used as the single
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* source of a .SHELL target. For user-defined
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* shells, this is the full path of the shell.
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*/
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Boolean hasEchoCtl; /* True if both echoOff and echoOn defined */
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const char *echoOff; /* command to turn off echo */
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const char *echoOn; /* command to turn it back on again */
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const char *noPrint; /* command to skip when printing output from
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* shell. This is usually the command which
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* was executed to turn off echoing */
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int noPLen; /* length of noPrint command */
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Boolean hasErrCtl; /* set if can control error checking for
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* individual commands */
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const char *errCheck; /* string to turn error checking on */
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const char *ignErr; /* string to turn off error checking */
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const char *errOut; /* string to use for testing exit code */
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const char *newline; /* string literal that results in a newline
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* character when it appears outside of any
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* 'quote' or "quote" characters */
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char commentChar; /* character used by shell for comment lines */
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/*
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* command-line flags
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*/
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const char *echo; /* echo commands */
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const char *exit; /* exit on error */
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} Shell;
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extern const char *shellPath;
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extern const char *shellName;
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extern int jobTokensRunning; /* tokens currently "out" */
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extern int maxJobs; /* Max jobs we can run */
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void Shell_Init(void);
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const char *Shell_GetNewline(void);
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void Job_Touch(GNode *, Boolean);
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Boolean Job_CheckCommands(GNode *, void (*abortProc )(const char *, ...));
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#define CATCH_BLOCK 1
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void Job_CatchChildren(void);
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void Job_CatchOutput(void);
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void Job_Make(GNode *);
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void Job_Init(void);
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Boolean Job_Full(void);
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Boolean Job_Empty(void);
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ReturnStatus Job_ParseShell(char *);
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int Job_Finish(void);
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void Job_End(void);
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void Job_Wait(void);
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void Job_AbortAll(void);
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void JobFlagForMigration(int);
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void Job_TokenReturn(void);
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Boolean Job_TokenWithdraw(void);
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void Job_ServerStart(int, int, int);
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#endif /* _JOB_H_ */
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