File: [cvs.NetBSD.org] / src / usr.bin / make / job.c (download)
Revision 1.190, Sun Apr 16 21:23:43 2017 UTC (7 years ago) by riastradh
Branch: MAIN
CVS Tags: prg-localcount2-base3, prg-localcount2-base2, prg-localcount2-base1, prg-localcount2-base, prg-localcount2, pgoyette-localcount-20170426, perseant-stdc-iso10646-base, perseant-stdc-iso10646, netbsd-8-base, netbsd-8-2-RELEASE, netbsd-8-1-RELEASE, netbsd-8-1-RC1, netbsd-8-0-RELEASE, netbsd-8-0-RC2, netbsd-8-0-RC1, netbsd-8, matt-nb8-mediatek-base, matt-nb8-mediatek, bouyer-socketcan-base1
Changes since 1.189: +4 -3
lines
Plug memory leak in JobPrintCommand.
CID 978366
|
/* $NetBSD: job.c,v 1.190 2017/04/16 21:23:43 riastradh 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.
*/
#ifndef MAKE_NATIVE
static char rcsid[] = "$NetBSD: job.c,v 1.190 2017/04/16 21:23:43 riastradh 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 1.190 2017/04/16 21:23:43 riastradh 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.
*
* 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_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 <assert.h>
#include <errno.h>
#ifndef USE_SELECT
#include <poll.h>
#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"
# define STATIC static
/*
* 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 */
#define JOB_TOKENS "+EI+" /* Token to requeue for each abort state */
/*
* this tracks the number of tokens currently "out" to build jobs.
*/
int jobTokensRunning = 0;
int not_parallel = 0; /* set if .NOT_PARALLEL */
/*
* 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 = NULL;
/* 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 */
/*
* Descriptions for various shells.
*
* The build environment may set DEFSHELL_INDEX to one of
* DEFSHELL_INDEX_SH, DEFSHELL_INDEX_KSH, or DEFSHELL_INDEX_CSH, to
* select one of the prefedined shells as the default shell.
*
* Alternatively, the build environment may set DEFSHELL_CUSTOM to the
* name or the full path of a sh-compatible shell, which will be used as
* the default shell.
*
* ".SHELL" lines in Makefiles can choose the default shell from the
# set defined here, or add additional shells.
*/
#ifdef DEFSHELL_CUSTOM
#define DEFSHELL_INDEX_CUSTOM 0
#define DEFSHELL_INDEX_SH 1
#define DEFSHELL_INDEX_KSH 2
#define DEFSHELL_INDEX_CSH 3
#else /* !DEFSHELL_CUSTOM */
#define DEFSHELL_INDEX_SH 0
#define DEFSHELL_INDEX_KSH 1
#define DEFSHELL_INDEX_CSH 2
#endif /* !DEFSHELL_CUSTOM */
#ifndef DEFSHELL_INDEX
#define DEFSHELL_INDEX 0 /* DEFSHELL_INDEX_CUSTOM or DEFSHELL_INDEX_SH */
#endif /* !DEFSHELL_INDEX */
static Shell shells[] = {
#ifdef DEFSHELL_CUSTOM
/*
* An sh-compatible shell with a non-standard name.
*
* Keep this in sync with the "sh" description below, but avoid
* non-portable features that might not be supplied by all
* sh-compatible shells.
*/
{
DEFSHELL_CUSTOM,
FALSE, "", "", "", 0,
FALSE, "echo \"%s\"\n", "%s\n", "{ %s \n} || exit $?\n", "'\n'", '#',
"",
"",
},
#endif /* DEFSHELL_CUSTOM */
/*
* 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", "'\n'", '#',
#if defined(MAKE_NATIVE) && defined(__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", "'\n'", '#',
"v",
"",
},
/*
* 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\"\n", "", "'\\\n'", '#',
"v", "e",
},
/*
* UNKNOWN.
*/
{
NULL,
FALSE, NULL, NULL, NULL, 0,
FALSE, NULL, NULL, NULL, NULL, 0,
NULL, NULL,
}
};
static Shell *commandShell = &shells[DEFSHELL_INDEX]; /* 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 */
char *shellErrFlag = NULL;
static const char *shellArgv = NULL; /* Custom shell args */
STATIC Job *job_table; /* The structures that describe them */
STATIC Job *job_table_end; /* job_table + maxJobs */
static int wantToken; /* we want a token */
static int lurking_children = 0;
static int make_suspended = 0; /* non-zero if we've seen a SIGTSTP (etc) */
/*
* Set of descriptors of pipes connected to
* the output channels of children
*/
static struct pollfd *fds = NULL;
static Job **jobfds = NULL;
static int nfds = 0;
static void watchfd(Job *);
static void clearfd(Job *);
static int readyfd(Job *);
STATIC GNode *lastNode; /* The node for which output was most recently
* produced. */
static char *targPrefix = NULL; /* What we print at the start of TARG_FMT */
static Job tokenWaitJob; /* token wait pseudo-job */
static Job childExitJob; /* child exit pseudo-job */
#define CHILD_EXIT "."
#define DO_JOB_RESUME "R"
#define TARG_FMT "%s %s ---\n" /* Default format */
#define MESSAGE(fp, gn) \
if (maxJobs != 1 && targPrefix && *targPrefix) \
(void)fprintf(fp, TARG_FMT, targPrefix, gn->name)
static sigset_t caught_signals; /* Set of signals we handle */
#if defined(SYSV)
#define KILLPG(pid, sig) kill(-(pid), (sig))
#else
#define KILLPG(pid, sig) killpg((pid), (sig))
#endif
static void JobChildSig(int);
static void JobContinueSig(int);
static Job *JobFindPid(int, int, Boolean);
static int JobPrintCommand(void *, void *);
static int JobSaveCommand(void *, void *);
static void JobClose(Job *);
static void JobExec(Job *, char **);
static void JobMakeArgv(Job *, char **);
static int JobStart(GNode *, int);
static char *JobOutput(Job *, char *, char *, int);
static void JobDoOutput(Job *, Boolean);
static Shell *JobMatchShell(const char *);
static void JobInterrupt(int, int) MAKE_ATTR_DEAD;
static void JobRestartJobs(void);
static void JobTokenAdd(void);
static void JobSigLock(sigset_t *);
static void JobSigUnlock(sigset_t *);
static void JobSigReset(void);
const char *malloc_options="A";
static void
job_table_dump(const char *where)
{
Job *job;
fprintf(debug_file, "job table @ %s\n", where);
for (job = job_table; job < job_table_end; job++) {
fprintf(debug_file, "job %d, status %d, flags %d, pid %d\n",
(int)(job - job_table), job->job_state, job->flags, job->pid);
}
}
/*
* Delete the target of a failed, interrupted, or otherwise
* unsuccessful job unless inhibited by .PRECIOUS.
*/
static void
JobDeleteTarget(GNode *gn)
{
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);
}
}
}
/*
* 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);
}
static void
JobCreatePipe(Job *job, int minfd)
{
int i, fd, flags;
if (pipe(job->jobPipe) == -1)
Punt("Cannot create pipe: %s", strerror(errno));
for (i = 0; i < 2; i++) {
/* Avoid using low numbered fds */
fd = fcntl(job->jobPipe[i], F_DUPFD, minfd);
if (fd != -1) {
close(job->jobPipe[i]);
job->jobPipe[i] = fd;
}
}
/* Set close-on-exec flag for both */
if (fcntl(job->jobPipe[0], F_SETFD, FD_CLOEXEC) == -1)
Punt("Cannot set close-on-exec: %s", strerror(errno));
if (fcntl(job->jobPipe[1], F_SETFD, FD_CLOEXEC) == -1)
Punt("Cannot set close-on-exec: %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->jobPipe[0], F_GETFL, 0);
if (flags == -1)
Punt("Cannot get flags: %s", strerror(errno));
flags |= O_NONBLOCK;
if (fcntl(job->jobPipe[0], F_SETFL, flags) == -1)
Punt("Cannot set flags: %s", strerror(errno));
}
/*-
*-----------------------------------------------------------------------
* JobCondPassSig --
* Pass a signal to a job
*
* Input:
* signop Signal to send it
*
* Side Effects:
* None, except the job may bite it.
*
*-----------------------------------------------------------------------
*/
static void
JobCondPassSig(int signo)
{
Job *job;
if (DEBUG(JOB)) {
(void)fprintf(debug_file, "JobCondPassSig(%d) called.\n", signo);
}
for (job = job_table; job < job_table_end; job++) {
if (job->job_state != JOB_ST_RUNNING)
continue;
if (DEBUG(JOB)) {
(void)fprintf(debug_file,
"JobCondPassSig passing signal %d to child %d.\n",
signo, job->pid);
}
KILLPG(job->pid, signo);
}
}
/*-
*-----------------------------------------------------------------------
* 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 MAKE_ATTR_UNUSED)
{
while (write(childExitJob.outPipe, CHILD_EXIT, 1) == -1 && errno == EAGAIN)
continue;
}
/*-
*-----------------------------------------------------------------------
* 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 MAKE_ATTR_UNUSED)
{
/*
* Defer sending to SIGCONT to our stopped children until we return
* from the signal handler.
*/
while (write(childExitJob.outPipe, DO_JOB_RESUME, 1) == -1 &&
errno == EAGAIN)
continue;
}
/*-
*-----------------------------------------------------------------------
* JobPassSig --
* Pass a signal on to all jobs, then resend to ourselves.
*
* Input:
* signo The signal number we've received
*
* Results:
* None.
*
* Side Effects:
* We die by the same signal.
*
*-----------------------------------------------------------------------
*/
MAKE_ATTR_DEAD static void
JobPassSig_int(int signo)
{
/* Run .INTERRUPT target then exit */
JobInterrupt(TRUE, signo);
}
MAKE_ATTR_DEAD static void
JobPassSig_term(int signo)
{
/* Dont run .INTERRUPT target then exit */
JobInterrupt(FALSE, signo);
}
static void
JobPassSig_suspend(int signo)
{
sigset_t nmask, omask;
struct sigaction act;
/* Suppress job started/continued messages */
make_suspended = 1;
/* Pass the signal onto every job */
JobCondPassSig(signo);
/*
* 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(debug_file,
"JobPassSig passing signal %d to self.\n", signo);
}
(void)kill(getpid(), signo);
/*
* We've been continued.
*
* A whole host of signals continue to happen!
* SIGCHLD for any processes that actually suspended themselves.
* SIGCHLD for any processes that exited while we were alseep.
* The SIGCONT that actually caused us to wakeup.
*
* Since we defer passing the SIGCONT on to our children until
* the main processing loop, we can be sure that all the SIGCHLD
* events will have happened by then - and that the waitpid() will
* collect the child 'suspended' events.
* For correct sequencing we just need to ensure we process the
* waitpid() before passign on the SIGCONT.
*
* In any case nothing else is needed here.
*/
/* Restore handler and signal mask */
act.sa_handler = JobPassSig_suspend;
(void)sigaction(signo, &act, NULL);
(void)sigprocmask(SIG_SETMASK, &omask, NULL);
}
/*-
*-----------------------------------------------------------------------
* JobFindPid --
* Compare the pid of the job with the given pid and return 0 if they
* are equal. This function is called from Job_CatchChildren
* to find the job descriptor of the finished job.
*
* Input:
* job job to examine
* pid process id desired
*
* Results:
* Job with matching pid
*
* Side Effects:
* None
*-----------------------------------------------------------------------
*/
static Job *
JobFindPid(int pid, int status, Boolean isJobs)
{
Job *job;
for (job = job_table; job < job_table_end; job++) {
if ((job->job_state == status) && job->pid == pid)
return job;
}
if (DEBUG(JOB) && isJobs)
job_table_dump("no pid");
return NULL;
}
/*-
*-----------------------------------------------------------------------
* 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(void *cmdp, void *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;
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,
cmd));
return 1;
}
return 0;
}
#define DBPRINTF(fmt, arg) if (DEBUG(JOB)) { \
(void)fprintf(debug_file, fmt, arg); \
} \
(void)fprintf(job->cmdFILE, fmt, arg); \
(void)fflush(job->cmdFILE);
numCommands += 1;
cmdStart = cmd = Var_Subst(NULL, cmd, job->node, VARF_WANTRES);
cmdTemplate = "%s\n";
/*
* Check for leading @' and -'s to control echoing and error checking.
*/
while (*cmd == '@' || *cmd == '-' || (*cmd == '+')) {
switch (*cmd) {
case '@':
shutUp = DEBUG(LOUD) ? FALSE : TRUE;
break;
case '-':
errOff = TRUE;
break;
case '+':
if (noSpecials) {
/*
* We're not actually executing anything...
* but this one needs to be - use compat mode just for it.
*/
CompatRunCommand(cmdp, job->node);
free(cmdStart);
return 0;
}
break;
}
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 = bmake_malloc((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 (!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.
*/
job->flags |= JOB_IGNERR;
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 or blank, treat as an ignored error */
if ((escCmd[0] == commandShell->commentChar) ||
(escCmd[0] == 0))
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;
}
DBPRINTF(cmdTemplate, cmd);
free(cmdStart);
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(void *cmd, void *gn)
{
cmd = Var_Subst(NULL, (char *)cmd, (GNode *)gn, VARF_WANTRES);
(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)
{
clearfd(job);
(void)close(job->outPipe);
job->outPipe = -1;
JobDoOutput(job, TRUE);
(void)close(job->inPipe);
job->inPipe = -1;
}
/*-
*-----------------------------------------------------------------------
* 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:
* 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, return_job_token;
if (DEBUG(JOB)) {
fprintf(debug_file, "Jobfinish: %d [%s], status %d\n",
job->pid, job->node->name, status);
}
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...
*/
JobClose(job);
if (job->cmdFILE != NULL && job->cmdFILE != stdout) {
(void)fclose(job->cmdFILE);
job->cmdFILE = NULL;
}
done = TRUE;
} 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);
} else {
/*
* No need to close things down or anything.
*/
done = FALSE;
}
if (done) {
if (WIFEXITED(status)) {
if (DEBUG(JOB)) {
(void)fprintf(debug_file, "Process %d [%s] exited.\n",
job->pid, job->node->name);
}
if (WEXITSTATUS(status) != 0) {
if (job->node != lastNode) {
MESSAGE(stdout, job->node);
lastNode = job->node;
}
#ifdef USE_META
if (useMeta) {
meta_job_error(job, job->node, job->flags, WEXITSTATUS(status));
}
#endif
(void)printf("*** [%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 (deleteOnError) {
JobDeleteTarget(job->node);
}
PrintOnError(job->node, NULL);
}
} else if (DEBUG(JOB)) {
if (job->node != lastNode) {
MESSAGE(stdout, job->node);
lastNode = job->node;
}
(void)printf("*** [%s] Completed successfully\n",
job->node->name);
}
} else {
if (job->node != lastNode) {
MESSAGE(stdout, job->node);
lastNode = job->node;
}
(void)printf("*** [%s] Signal %d\n",
job->node->name, WTERMSIG(status));
if (deleteOnError) {
JobDeleteTarget(job->node);
}
}
(void)fflush(stdout);
}
#ifdef USE_META
if (useMeta) {
int x;
if ((x = meta_job_finish(job)) != 0 && status == 0) {
status = x;
}
}
#endif
return_job_token = FALSE;
Trace_Log(JOBEND, job);
if (!(job->flags & JOB_SPECIAL)) {
if ((status != 0) ||
(aborting == ABORT_ERROR) ||
(aborting == ABORT_INTERRUPT))
return_job_token = TRUE;
}
if ((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 != NULL) {
Lst_ForEachFrom(job->node->commands, job->tailCmds,
JobSaveCommand,
job->node);
}
job->node->made = MADE;
if (!(job->flags & JOB_SPECIAL))
return_job_token = TRUE;
Make_Update(job->node);
job->job_state = JOB_ST_FREE;
} else if (status != 0) {
errors += 1;
job->job_state = JOB_ST_FREE;
}
/*
* 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 (return_job_token)
Job_TokenReturn();
if (aborting == ABORT_ERROR && jobTokensRunning == 0) {
/*
* 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_SPECIAL|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, ×) < 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);
while (write(streamID, &c, 1) == -1 && errno == EAGAIN)
continue;
}
(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 != NULL) && !Lst_IsEmpty(DEFAULT->commands) &&
(gn->type & OP_SPECIAL) == 0) {
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);
free(p1);
} else if (Dir_MTime(gn, 0) == 0 && (gn->type & OP_SPECIAL) == 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->flags & FROM_DEPEND) {
if (!Job_RunTarget(".STALE", gn->fname))
fprintf(stdout, "%s: %s, %d: ignoring stale %s for %s\n",
progname, gn->fname, gn->lineno, makeDependfile,
gn->name);
return TRUE;
}
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;
}
/*-
*-----------------------------------------------------------------------
* JobExec --
* Execute the shell for the given job. Called from JobStart
*
* 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(debug_file, "Running %s %sly\n", job->node->name, "local");
(void)fprintf(debug_file, "\tCommand: ");
for (i = 0; argv[i] != NULL; i++) {
(void)fprintf(debug_file, "%s ", argv[i]);
}
(void)fprintf(debug_file, "\n");
}
/*
* 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_SILENT)) {
MESSAGE(stdout, job->node);
lastNode = job->node;
}
/* No interruptions until this job is on the `jobs' list */
JobSigLock(&mask);
/* Pre-emptively mark job running, pid still zero though */
job->job_state = JOB_ST_RUNNING;
cpid = vFork();
if (cpid == -1)
Punt("Cannot vfork: %s", strerror(errno));
if (cpid == 0) {
/* Child */
sigset_t tmask;
#ifdef USE_META
if (useMeta) {
meta_job_child(job);
}
#endif
/*
* Reset all signal handlers; this is necessary because we also
* need to unblock signals before we exec(2).
*/
JobSigReset();
/* Now unblock signals */
sigemptyset(&tmask);
JobSigUnlock(&tmask);
/*
* 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);
}
if (fcntl(0, F_SETFD, 0) == -1) {
execError("fcntl clear close-on-exec", "stdin");
_exit(1);
}
if (lseek(0, (off_t)0, SEEK_SET) == -1) {
execError("lseek to 0", "stdin");
_exit(1);
}
if (job->node->type & (OP_MAKE | OP_SUBMAKE)) {
/*
* Pass job token pipe to submakes.
*/
if (fcntl(tokenWaitJob.inPipe, F_SETFD, 0) == -1) {
execError("clear close-on-exec", "tokenWaitJob.inPipe");
_exit(1);
}
if (fcntl(tokenWaitJob.outPipe, F_SETFD, 0) == -1) {
execError("clear close-on-exec", "tokenWaitJob.outPipe");
_exit(1);
}
}
/*
* 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);
}
/*
* 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.
*/
if (fcntl(1, F_SETFD, 0) == -1) {
execError("clear close-on-exec", "stdout");
_exit(1);
}
if (dup2(1, 2) == -1) {
execError("dup2", "1, 2");
_exit(1);
}
/*
* 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(MAKE_NATIVE) || defined(HAVE_SETPGID)
#if defined(SYSV)
/* XXX: dsl - I'm sure this should be setpgrp()... */
(void)setsid();
#else
(void)setpgid(0, getpid());
#endif
#endif
Var_ExportVars();
(void)execv(shellPath, argv);
execError("exec", shellPath);
_exit(1);
}
/* Parent, continuing after the child exec */
job->pid = cpid;
Trace_Log(JOBSTART, job);
/*
* Set the current position in the buffer to the beginning
* and mark another stream to watch in the outputs mask
*/
job->curPos = 0;
watchfd(job);
if (job->cmdFILE != NULL && job->cmdFILE != stdout) {
(void)fclose(job->cmdFILE);
job->cmdFILE = NULL;
}
/*
* Now the job is actually running, add it to the table.
*/
if (DEBUG(JOB)) {
fprintf(debug_file, "JobExec(%s): pid %d added to jobs table\n",
job->node->name, job->pid);
job_table_dump("job started");
}
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;
}
/*-
*-----------------------------------------------------------------------
* 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.
*
* NB: I'm fairly sure that this code is never called with JOB_SPECIAL set
* JOB_IGNDOTS is never set (dsl)
* Also the return value is ignored by everyone.
*-----------------------------------------------------------------------
*/
static int
JobStart(GNode *gn, int flags)
{
Job *job; /* new job descriptor */
char *argv[10]; /* Argument vector to shell */
Boolean cmdsOK; /* true if the nodes commands were all right */
Boolean noExec; /* Set true if we decide not to run the job */
int tfd; /* File descriptor to the temp file */
for (job = job_table; job < job_table_end; job++) {
if (job->job_state == JOB_ST_FREE)
break;
}
if (job >= job_table_end)
Punt("JobStart no job slots vacant");
memset(job, 0, sizeof *job);
job->job_state = JOB_ST_SETUP;
if (gn->type & OP_SPECIAL)
flags |= JOB_SPECIAL;
job->node = gn;
job->tailCmds = NULL;
/*
* 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
*/
cmdsOK = Job_CheckCommands(gn, Error);
job->inPollfd = NULL;
/*
* 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 removed before the child shell is executed, unless
* DEBUG(SCRIPT) is set.
*/
char *tfile;
sigset_t mask;
/*
* We're serious here, but if the commands were bogus, we're
* also dead...
*/
if (!cmdsOK) {
PrintOnError(gn, NULL); /* provide some clue */
DieHorribly();
}
JobSigLock(&mask);
tfd = mkTempFile(TMPPAT, &tfile);
if (!DEBUG(SCRIPT))
(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, FD_CLOEXEC);
/*
* Send the commands to the command file, flush all its buffers then
* rewind and remove the thing.
*/
noExec = FALSE;
#ifdef USE_META
if (useMeta) {
meta_job_start(job, gn);
if (Targ_Silent(gn)) { /* might have changed */
job->flags |= JOB_SILENT;
}
}
#endif
/*
* We can do all the commands at once. hooray for sanity
*/
numCommands = 0;
Lst_ForEach(gn->commands, JobPrintCommand, 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;
}
free(tfile);
} 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, 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;
}
/* Just in case it isn't already... */
(void)fflush(job->cmdFILE);
/*
* If we're not supposed to execute a shell, don't.
*/
if (noExec) {
if (!(job->flags & JOB_SPECIAL))
Job_TokenReturn();
/*
* 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;
}
}
/*
* 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 && aborting == 0) {
if (job->tailCmds != NULL) {
Lst_ForEachFrom(job->node->commands, job->tailCmds,
JobSaveCommand,
job->node);
}
job->node->made = MADE;
Make_Update(job->node);
}
job->job_state = JOB_ST_FREE;
return cmdsOK ? JOB_FINISHED : JOB_ERROR;
}
/*
* Set up the control arguments to the shell. This is based on the flags
* set earlier for this job.
*/
JobMakeArgv(job, argv);
/* Create the pipe by which we'll get the shell's output. */
JobCreatePipe(job, 3);
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 (!beSilent && 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 */
/*
* 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 (errno == EAGAIN)
return;
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 (!beSilent && job->node != lastNode) {
MESSAGE(stdout, job->node);
lastNode = job->node;
}
#ifdef USE_META
if (useMeta) {
meta_job_output(job, cp, gotNL ? "\n" : "");
}
#endif
(void)fprintf(stdout, "%s%s", cp, gotNL ? "\n" : "");
(void)fflush(stdout);
}
}
/*
* max is the last offset still in the buffer. Move any remaining
* characters to the start of the buffer and update the end marker
* curPos.
*/
if (i < max) {
(void)memmove(job->outBuf, &job->outBuf[i + 1], max - (i + 1));
job->curPos = max - (i + 1);
} else {
assert(i == max);
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;
}
}
static void
JobRun(GNode *targ)
{
#ifdef notyet
/*
* Unfortunately it is too complicated to run .BEGIN, .END,
* and .INTERRUPT job in the parallel job module. This has
* the nice side effect that it avoids a lot of other problems.
*/
Lst lst = Lst_Init(FALSE);
Lst_AtEnd(lst, targ);
(void)Make_Run(lst);
Lst_Destroy(lst, NULL);
JobStart(targ, JOB_SPECIAL);
while (jobTokensRunning) {
Job_CatchOutput();
}
#else
Compat_Make(targ, targ);
if (targ->made == ERROR) {
PrintOnError(targ, "\n\nStop.");
exit(1);
}
#endif
}
/*-
*-----------------------------------------------------------------------
* 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.
*
*-----------------------------------------------------------------------
*/
void
Job_CatchChildren(void)
{
int pid; /* pid of dead child */
int status; /* Exit/termination status */
/*
* Don't even bother if we know there's no one around.
*/
if (jobTokensRunning == 0)
return;
while ((pid = waitpid((pid_t) -1, &status, WNOHANG | WUNTRACED)) > 0) {
if (DEBUG(JOB)) {
(void)fprintf(debug_file, "Process %d exited/stopped status %x.\n", pid,
status);
}
JobReapChild(pid, status, TRUE);
}
}
/*
* It is possible that wait[pid]() was called from elsewhere,
* this lets us reap jobs regardless.
*/
void
JobReapChild(pid_t pid, int status, Boolean isJobs)
{
Job *job; /* job descriptor for dead child */
/*
* Don't even bother if we know there's no one around.
*/
if (jobTokensRunning == 0)
return;
job = JobFindPid(pid, JOB_ST_RUNNING, isJobs);
if (job == NULL) {
if (isJobs) {
if (!lurking_children)
Error("Child (%d) status %x not in table?", pid, status);
}
return; /* not ours */
}
if (WIFSTOPPED(status)) {
if (DEBUG(JOB)) {
(void)fprintf(debug_file, "Process %d (%s) stopped.\n",
job->pid, job->node->name);
}
if (!make_suspended) {
switch (WSTOPSIG(status)) {
case SIGTSTP:
(void)printf("*** [%s] Suspended\n", job->node->name);
break;
case SIGSTOP:
(void)printf("*** [%s] Stopped\n", job->node->name);
break;
default:
(void)printf("*** [%s] Stopped -- signal %d\n",
job->node->name, WSTOPSIG(status));
}
job->job_suspended = 1;
}
(void)fflush(stdout);
return;
}
job->job_state = JOB_ST_FINISHED;
job->exit_status = status;
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;
Job *job;
int i;
(void)fflush(stdout);
/* The first fd in the list is the job token pipe */
do {
nready = poll(fds + 1 - wantToken, nfds - 1 + wantToken, POLL_MSEC);
} while (nready < 0 && errno == EINTR);
if (nready < 0)
Punt("poll: %s", strerror(errno));
if (nready > 0 && readyfd(&childExitJob)) {
char token = 0;
ssize_t count;
count = read(childExitJob.inPipe, &token, 1);
switch (count) {
case 0:
Punt("unexpected eof on token pipe");
case -1:
Punt("token pipe read: %s", strerror(errno));
case 1:
if (token == DO_JOB_RESUME[0])
/* Complete relay requested from our SIGCONT handler */
JobRestartJobs();
break;
default:
abort();
}
--nready;
}
Job_CatchChildren();
if (nready == 0)
return;
for (i = 2; i < nfds; i++) {
if (!fds[i].revents)
continue;
job = jobfds[i];
if (job->job_state == JOB_ST_RUNNING)
JobDoOutput(job, FALSE);
if (--nready == 0)
return;
}
}
/*-
*-----------------------------------------------------------------------
* 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);
}
void
Shell_Init(void)
{
if (shellPath == NULL) {
/*
* We are using the default shell, which may be an absolute
* path if DEFSHELL_CUSTOM is defined.
*/
shellName = commandShell->name;
#ifdef DEFSHELL_CUSTOM
if (*shellName == '/') {
shellPath = shellName;
shellName = strrchr(shellPath, '/');
shellName++;
} else
#endif
shellPath = str_concat(_PATH_DEFSHELLDIR, shellName, STR_ADDSLASH);
}
if (commandShell->exit == NULL) {
commandShell->exit = "";
}
if (commandShell->echo == NULL) {
commandShell->echo = "";
}
if (commandShell->hasErrCtl && *commandShell->exit) {
if (shellErrFlag &&
strcmp(commandShell->exit, &shellErrFlag[1]) != 0) {
free(shellErrFlag);
shellErrFlag = NULL;
}
if (!shellErrFlag) {
int n = strlen(commandShell->exit) + 2;
shellErrFlag = bmake_malloc(n);
if (shellErrFlag) {
snprintf(shellErrFlag, n, "-%s", commandShell->exit);
}
}
} else if (shellErrFlag) {
free(shellErrFlag);
shellErrFlag = NULL;
}
}
/*-
* Returns the string literal that is used in the current command shell
* to produce a newline character.
*/
const char *
Shell_GetNewline(void)
{
return commandShell->newline;
}
void
Job_SetPrefix(void)
{
if (targPrefix) {
free(targPrefix);
} else if (!Var_Exists(MAKE_JOB_PREFIX, VAR_GLOBAL)) {
Var_Set(MAKE_JOB_PREFIX, "---", VAR_GLOBAL, 0);
}
targPrefix = Var_Subst(NULL, "${" MAKE_JOB_PREFIX "}",
VAR_GLOBAL, VARF_WANTRES);
}
/*-
*-----------------------------------------------------------------------
* Job_Init --
* Initialize the process module
*
* Input:
*
* Results:
* none
*
* Side Effects:
* lists and counters are initialized
*-----------------------------------------------------------------------
*/
void
Job_Init(void)
{
Job_SetPrefix();
/* Allocate space for all the job info */
job_table = bmake_malloc(maxJobs * sizeof *job_table);
memset(job_table, 0, maxJobs * sizeof *job_table);
job_table_end = job_table + maxJobs;
wantToken = 0;
aborting = 0;
errors = 0;
lastNode = NULL;
/*
* There is a non-zero chance that we already have children.
* eg after 'make -f- <<EOF'
* Since their termination causes a 'Child (pid) not in table' message,
* Collect the status of any that are already dead, and suppress the
* error message if there are any undead ones.
*/
for (;;) {
int rval, status;
rval = waitpid((pid_t) -1, &status, WNOHANG);
if (rval > 0)
continue;
if (rval == 0)
lurking_children = 1;
break;
}
Shell_Init();
JobCreatePipe(&childExitJob, 3);
/* We can only need to wait for tokens, children and output from each job */
fds = bmake_malloc(sizeof (*fds) * (2 + maxJobs));
jobfds = bmake_malloc(sizeof (*jobfds) * (2 + maxJobs));
/* These are permanent entries and take slots 0 and 1 */
watchfd(&tokenWaitJob);
watchfd(&childExitJob);
sigemptyset(&caught_signals);
/*
* Install a SIGCHLD handler.
*/
(void)bmake_signal(SIGCHLD, JobChildSig);
sigaddset(&caught_signals, SIGCHLD);
#define ADDSIG(s,h) \
if (bmake_signal(s, SIG_IGN) != SIG_IGN) { \
sigaddset(&caught_signals, s); \
(void)bmake_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_int)
ADDSIG(SIGHUP, JobPassSig_term)
ADDSIG(SIGTERM, JobPassSig_term)
ADDSIG(SIGQUIT, JobPassSig_term)
/*
* 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)
*/
ADDSIG(SIGTSTP, JobPassSig_suspend)
ADDSIG(SIGTTOU, JobPassSig_suspend)
ADDSIG(SIGTTIN, JobPassSig_suspend)
ADDSIG(SIGWINCH, JobCondPassSig)
ADDSIG(SIGCONT, JobContinueSig)
#undef ADDSIG
(void)Job_RunTarget(".BEGIN", NULL);
postCommands = Targ_FindNode(".END", TARG_CREATE);
}
static void JobSigReset(void)
{
#define DELSIG(s) \
if (sigismember(&caught_signals, s)) { \
(void)bmake_signal(s, SIG_DFL); \
}
DELSIG(SIGINT)
DELSIG(SIGHUP)
DELSIG(SIGQUIT)
DELSIG(SIGTERM)
DELSIG(SIGTSTP)
DELSIG(SIGTTOU)
DELSIG(SIGTTIN)
DELSIG(SIGWINCH)
DELSIG(SIGCONT)
#undef DELSIG
(void)bmake_signal(SIGCHLD, SIG_DFL);
}
/*-
*-----------------------------------------------------------------------
* 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
* newline String literal to represent a newline char
* 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++;
}
free(UNCONST(shellArgv));
memset(&newShell, 0, sizeof(newShell));
/*
* Parse the specification by keyword
*/
words = brk_string(line, &argc, TRUE, &path);
if (words == NULL) {
Error("Unterminated quoted string [%s]", line);
return FAILURE;
}
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, "newline=", 8) == 0) {
newShell.newline = &argv[0][8];
} 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
* Shell_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;
if (shellPath) {
/* Shell_Init has already been called! Do it again. */
free(UNCONST(shellPath));
shellPath = NULL;
Shell_Init();
}
}
} 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 = bmake_malloc(sizeof(Shell));
*commandShell = newShell;
}
/* this will take care of shellErrFlag */
Shell_Init();
}
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)
{
Job *job; /* job descriptor in that element */
GNode *interrupt; /* the node describing the .INTERRUPT target */
sigset_t mask;
GNode *gn;
aborting = ABORT_INTERRUPT;
JobSigLock(&mask);
for (job = job_table; job < job_table_end; job++) {
if (job->job_state != JOB_ST_RUNNING)
continue;
gn = job->node;
JobDeleteTarget(gn);
if (job->pid) {
if (DEBUG(JOB)) {
(void)fprintf(debug_file,
"JobInterrupt passing signal %d to child %d.\n",
signo, job->pid);
}
KILLPG(job->pid, signo);
}
}
JobSigUnlock(&mask);
if (runINTERRUPT && !touchFlag) {
interrupt = Targ_FindNode(".INTERRUPT", TARG_NOCREATE);
if (interrupt != NULL) {
ignoreErrors = FALSE;
JobRun(interrupt);
}
}
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 != NULL &&
(!Lst_IsEmpty(postCommands->commands) ||
!Lst_IsEmpty(postCommands->children))) {
if (errors) {
Error("Errors reported so .END ignored");
} else {
JobRun(postCommands);
}
}
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
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 (jobTokensRunning != 0) {
Job_CatchOutput();
}
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)
{
Job *job; /* the job descriptor in that element */
int foo;
aborting = ABORT_ERROR;
if (jobTokensRunning) {
for (job = job_table; job < job_table_end; job++) {
if (job->job_state != JOB_ST_RUNNING)
continue;
/*
* kill the child process with increasingly drastic signals to make
* darn sure it's dead.
*/
KILLPG(job->pid, SIGINT);
KILLPG(job->pid, SIGKILL);
}
}
/*
* Catch as many children as want to report in at first, then give up
*/
while (waitpid((pid_t) -1, &foo, WNOHANG) > 0)
continue;
}
/*-
*-----------------------------------------------------------------------
* JobRestartJobs --
* Tries to restart stopped jobs if there are slots available.
* Called in process context in response to a SIGCONT.
*
* Results:
* None.
*
* Side Effects:
* Resumes jobs.
*
*-----------------------------------------------------------------------
*/
static void
JobRestartJobs(void)
{
Job *job;
for (job = job_table; job < job_table_end; job++) {
if (job->job_state == JOB_ST_RUNNING &&
(make_suspended || job->job_suspended)) {
if (DEBUG(JOB)) {
(void)fprintf(debug_file, "Restarting stopped job pid %d.\n",
job->pid);
}
if (job->job_suspended) {
(void)printf("*** [%s] Continued\n", job->node->name);
(void)fflush(stdout);
}
job->job_suspended = 0;
if (KILLPG(job->pid, SIGCONT) != 0 && DEBUG(JOB)) {
fprintf(debug_file, "Failed to send SIGCONT to %d\n", job->pid);
}
}
if (job->job_state == JOB_ST_FINISHED)
/* Job exit deferred after calling waitpid() in a signal handler */
JobFinish(job, job->exit_status);
}
make_suspended = 0;
}
static void
watchfd(Job *job)
{
if (job->inPollfd != NULL)
Punt("Watching watched job");
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;
}
/*-
*-----------------------------------------------------------------------
* 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)
{
char tok = JOB_TOKENS[aborting], tok1;
/* If we are depositing an error token flush everything else */
while (tok != '+' && read(tokenWaitJob.inPipe, &tok1, 1) == 1)
continue;
if (DEBUG(JOB))
fprintf(debug_file, "(%d) aborting %d, deposit token %c\n",
getpid(), aborting, JOB_TOKENS[aborting]);
while (write(tokenWaitJob.outPipe, &tok, 1) == -1 && errno == EAGAIN)
continue;
}
/*-
*-----------------------------------------------------------------------
* Job_ServerStartTokenAdd --
* Prep the job token pipe in the root make process.
*
*-----------------------------------------------------------------------
*/
void
Job_ServerStart(int max_tokens, int jp_0, int jp_1)
{
int i;
char jobarg[64];
if (jp_0 >= 0 && jp_1 >= 0) {
/* Pipe passed in from parent */
tokenWaitJob.inPipe = jp_0;
tokenWaitJob.outPipe = jp_1;
(void)fcntl(jp_0, F_SETFD, FD_CLOEXEC);
(void)fcntl(jp_1, F_SETFD, FD_CLOEXEC);
return;
}
JobCreatePipe(&tokenWaitJob, 15);
snprintf(jobarg, sizeof(jobarg), "%d,%d",
tokenWaitJob.inPipe, tokenWaitJob.outPipe);
Var_Append(MAKEFLAGS, "-J", VAR_GLOBAL);
Var_Append(MAKEFLAGS, jobarg, VAR_GLOBAL);
/*
* Preload the job pipe with one token per job, save the one
* "extra" token for the primary job.
*
* XXX should clip maxJobs against PIPE_BUF -- if max_tokens is
* larger than the write buffer size of the pipe, we will
* deadlock here.
*/
for (i = 1; i < max_tokens; i++)
JobTokenAdd();
}
/*-
*-----------------------------------------------------------------------
* Job_TokenReturn --
* Return a withdrawn token to the pool.
*
*-----------------------------------------------------------------------
*/
void
Job_TokenReturn(void)
{
jobTokensRunning--;
if (jobTokensRunning < 0)
Punt("token botch");
if (jobTokensRunning || JOB_TOKENS[aborting] != '+')
JobTokenAdd();
}
/*-
*-----------------------------------------------------------------------
* 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, tok1;
int count;
wantToken = 0;
if (DEBUG(JOB))
fprintf(debug_file, "Job_TokenWithdraw(%d): aborting %d, running %d\n",
getpid(), aborting, jobTokensRunning);
if (aborting || (jobTokensRunning >= maxJobs))
return FALSE;
count = read(tokenWaitJob.inPipe, &tok, 1);
if (count == 0)
Fatal("eof on job pipe!");
if (count < 0 && jobTokensRunning != 0) {
if (errno != EAGAIN) {
Fatal("job pipe read: %s", strerror(errno));
}
if (DEBUG(JOB))
fprintf(debug_file, "(%d) blocked for token\n", getpid());
wantToken = 1;
return FALSE;
}
if (count == 1 && tok != '+') {
/* make being abvorted - remove any other job tokens */
if (DEBUG(JOB))
fprintf(debug_file, "(%d) aborted by token %c\n", getpid(), tok);
while (read(tokenWaitJob.inPipe, &tok1, 1) == 1)
continue;
/* And put the stopper back */
while (write(tokenWaitJob.outPipe, &tok, 1) == -1 && errno == EAGAIN)
continue;
Fatal("A failure has been detected in another branch of the parallel make");
}
if (count == 1 && jobTokensRunning == 0)
/* We didn't want the token really */
while (write(tokenWaitJob.outPipe, &tok, 1) == -1 && errno == EAGAIN)
continue;
jobTokensRunning++;
if (DEBUG(JOB))
fprintf(debug_file, "(%d) withdrew token\n", getpid());
return TRUE;
}
/*-
*-----------------------------------------------------------------------
* Job_RunTarget --
* Run the named target if found. If a filename is specified, then
* set that to the sources.
*
* Results:
* None
*
* Side Effects:
* exits if the target fails.
*
*-----------------------------------------------------------------------
*/
Boolean
Job_RunTarget(const char *target, const char *fname) {
GNode *gn = Targ_FindNode(target, TARG_NOCREATE);
if (gn == NULL)
return FALSE;
if (fname)
Var_Set(ALLSRC, fname, gn, 0);
JobRun(gn);
if (gn->made == ERROR) {
PrintOnError(gn, "\n\nStop.");
exit(1);
}
return TRUE;
}
#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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