11d35f72b2
with a table that is malloced with 'maxJobs' entries. Add a 'job_state' field to the Job type that exactly follows which of the old lists the job was on (or not). Change all the code that scanned the lists to scan the array. No logic changes in this commit. (Soon we'll no longer need to lock out signals for the changes to job statuses that are done from signal handlers now that there is no linked list.)
300 lines
12 KiB
C
300 lines
12 KiB
C
/* $NetBSD: job.h,v 1.29 2006/09/22 19:07:09 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) A union of things used for handling the shell's output. Different
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* parts of the union are used based on the value of the usePipes
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* flag. If it is true, 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. If, on the other hand, usePipes is false,
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* the output is routed to a temporary file and all that is kept
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* is the name of the file and the descriptor open to the file.
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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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* The job "table" is kept as a linked Lst in 'jobs', with the number of
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* active jobs maintained in the 'nJobs' variable. At no time will this
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* exceed the value of 'maxJobs', initialized by the Job_Init function.
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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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short job_status; /* 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 2 /* Job is running, pid valid */
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#define JOB_ST_STOPPED 3 /* Job is stopped (ie after ^Z) */
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#define JOB_ST_FINISHED 4 /* Job is done (ie after SIGCHILD) */
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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_RESUME 0x100 /* Job needs to be resumed b/c it stopped,
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* for some reason */
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#define JOB_CONTINUING 0x200 /* We are in the process of resuming this job.
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* Used to avoid infinite recursion between
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* JobFinish and JobRestart */
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#define JOB_TRACED 0x400 /* we've sent 'set -x' */
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union {
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struct {
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int op_inPipe; /* Input side of pipe associated
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* with job's output channel */
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struct pollfd *op_inPollfd; /* pollfd associated with inPipe */
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int op_outPipe; /* Output side of pipe associated with
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* job's output channel */
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char op_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 op_curPos; /* Current position in op_outBuf */
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} o_pipe; /* data used when catching the output via
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* a pipe */
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struct {
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char of_outFile[sizeof(TMPPAT)+2];
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/* Name of file to which shell output
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* was rerouted */
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int of_outFd; /* Stream open to the output
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* file. Used to funnel all
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* from a single job to one file
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* while still allowing
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* multiple shell invocations */
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} o_file; /* Data used when catching the output in
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* a temporary file */
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} output; /* Data for tracking a shell's output */
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} Job;
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#define outPipe output.o_pipe.op_outPipe
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#define inPipe output.o_pipe.op_inPipe
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#define inPollfd output.o_pipe.op_inPollfd
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#define outBuf output.o_pipe.op_outBuf
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#define curPos output.o_pipe.op_curPos
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#define outFile output.o_file.of_outFile
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#define outFd output.o_file.of_outFd
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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 job_pipe[2]; /* token pipe for jobs. */
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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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extern int maxJobTokens; /* Number of token for the job pipe */
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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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void Job_CatchChildren(Boolean);
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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(void);
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#endif /* _JOB_H_ */
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