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freebsd-dev/usr.bin/make/job.c
Hartmut Brandt 192ee26c2f Mostly stylistic changes: remove the noPLen field from the Shell 
structure - it is just the strlen() of noPrint. Inline JobCondPassSig()
in the only function JobPassSig() using it. Fix the argument types
of JobPrintCommand(). Better parsing for the .SHELL target keywords.
2005-04-07 11:26:15 +00:00

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/*-
* Copyright (c) 1988, 1989, 1990, 1993
* The Regents of the University of California. All rights reserved.
* 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.
*
* @(#)job.c 8.2 (Berkeley) 3/19/94
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#ifndef OLD_JOKE
#define OLD_JOKE 0
#endif /* OLD_JOKE */
/*-
* job.c --
* handle the creation etc. of our child processes.
*
* Interface:
* Job_Make Start the creation of the given target.
*
* Job_CatchChildren
* Check for and handle the termination of any children.
* This must be called reasonably frequently to keep the
* whole make going at a decent clip, since job table
* entries aren't removed until their process is caught
* this way. Its single argument is TRUE if the function
* should block waiting for a child to terminate.
*
* Job_CatchOutput Print any output our children have produced. Should
* also be called fairly frequently to keep the user
* informed of what's going on. If no output is waiting,
* it will block for a time given by the SEL_* constants,
* below, or until output is ready.
*
* Job_Init Called to intialize this module. in addition, any
* commands attached to the .BEGIN target are executed
* before this function returns. Hence, the makefile must
* have been parsed before this function is called.
*
* Job_Full Return TRUE if the job table is filled.
*
* Job_Empty Return TRUE if the job table is completely empty.
*
* Job_ParseShell Given the line following a .SHELL target, parse the
* line as a shell specification. Returns FAILURE if the
* spec was incorrect.
*
* Job_Finish Perform any final processing which needs doing. This
* includes the execution of any commands which have
* been/were attached to the .END target. It should only
* be called when the job table is empty.
*
* Job_AbortAll Abort all currently running jobs. It doesn't handle
* output or do anything for the jobs, just kills them.
* It should only be called in an emergency, as it were.
*
* Job_CheckCommands
* Verify that the commands for a target are ok. Provide
* them if necessary and possible.
*
* Job_Touch Update a target without really updating it.
*
* Job_Wait Wait for all currently-running jobs to finish.
*/
#include <sys/queue.h>
#include <sys/types.h>
#include <sys/select.h>
#include <sys/stat.h>
#ifdef USE_KQUEUE
#include <sys/event.h>
#endif
#include <sys/wait.h>
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <inttypes.h>
#include <string.h>
#include <signal.h>
#include <stdlib.h>
#include <unistd.h>
#include <utime.h>
#include "arch.h"
#include "buf.h"
#include "compat.h"
#include "dir.h"
#include "globals.h"
#include "GNode.h"
#include "job.h"
#include "make.h"
#include "parse.h"
#include "pathnames.h"
#include "str.h"
#include "targ.h"
#include "util.h"
#include "var.h"
/*
* Job Table definitions.
*
* The job "table" is kept as a linked Lst in 'jobs', with the number of
* active jobs maintained in the 'nJobs' variable. At no time will this
* exceed the value of 'maxJobs', initialized by the Job_Init function.
*
* When a job is finished, the Make_Update function is called on each of the
* parents of the node which was just remade. This takes care of the upward
* traversal of the dependency graph.
*/
#define JOB_BUFSIZE 1024
typedef struct Job {
pid_t pid; /* The child's process ID */
struct GNode *node; /* The target the child is making */
/*
* A LstNode for the first command to be saved after the job completes.
* This is NULL if there was no "..." in the job's commands.
*/
LstNode *tailCmds;
/*
* An FILE* for writing out the commands. This is only
* used before the job is actually started.
*/
FILE *cmdFILE;
/*
* A word of flags which determine how the module handles errors,
* echoing, etc. for the job
*/
short flags; /* Flags to control treatment of job */
#define JOB_IGNERR 0x001 /* Ignore non-zero exits */
#define JOB_SILENT 0x002 /* no output */
#define JOB_SPECIAL 0x004 /* Target is a special one. i.e. run it locally
* if we can't export it and maxLocal is 0 */
#define JOB_IGNDOTS 0x008 /* Ignore "..." lines when processing
* commands */
#define JOB_FIRST 0x020 /* Job is first job for the node */
#define JOB_RESTART 0x080 /* Job needs to be completely restarted */
#define JOB_RESUME 0x100 /* Job needs to be resumed b/c it stopped,
* for some reason */
#define JOB_CONTINUING 0x200 /* We are in the process of resuming this job.
* Used to avoid infinite recursion between
* JobFinish and JobRestart */
/* union for handling shell's output */
union {
/*
* This part is used when usePipes is true.
* The output is being caught via a pipe and the descriptors
* of our pipe, an array in which output is line buffered and
* the current position in that buffer are all maintained for
* each job.
*/
struct {
/*
* Input side of pipe associated with
* job's output channel
*/
int op_inPipe;
/*
* Output side of pipe associated with job's
* output channel
*/
int op_outPipe;
/*
* Buffer for storing the output of the
* job, line by line
*/
char op_outBuf[JOB_BUFSIZE + 1];
/* Current position in op_outBuf */
int op_curPos;
} o_pipe;
/*
* If usePipes is false the output is routed to a temporary
* file and all that is kept is the name of the file and the
* descriptor open to the file.
*/
struct {
/* Name of file to which shell output was rerouted */
char of_outFile[sizeof(TMPPAT)];
/*
* Stream open to the output file. Used to funnel all
* from a single job to one file while still allowing
* multiple shell invocations
*/
int of_outFd;
} o_file;
} output; /* Data for tracking a shell's output */
TAILQ_ENTRY(Job) link; /* list link */
} Job;
#define outPipe output.o_pipe.op_outPipe
#define inPipe output.o_pipe.op_inPipe
#define outBuf output.o_pipe.op_outBuf
#define curPos output.o_pipe.op_curPos
#define outFile output.o_file.of_outFile
#define outFd output.o_file.of_outFd
TAILQ_HEAD(JobList, Job);
/*
* Shell Specifications:
*
* Some special stuff goes on if a shell doesn't have error control. In such
* a case, errCheck becomes a printf template for echoing the command,
* should echoing be on and ignErr becomes another printf template for
* executing the command while ignoring the return status. If either of these
* strings is empty when hasErrCtl is FALSE, the command will be executed
* anyway as is and if it causes an error, so be it.
*/
#define DEF_SHELL_STRUCT(TAG, CONST) \
struct TAG { \
/* \
* the name of the shell. For Bourne and C shells, this is used \
* only to find the shell description when used as the single \
* source of a .SHELL target. For user-defined shells, this is \
* the full path of the shell. \
*/ \
CONST char *name; \
\
/* True if both echoOff and echoOn defined */ \
Boolean hasEchoCtl; \
\
CONST char *echoOff; /* command to turn off echo */ \
CONST char *echoOn; /* command to turn it back on */\
\
/* \
* What the shell prints, and its length, when given the \
* echo-off command. This line will not be printed when \
* received from the shell. This is usually the command which \
* was executed to turn off echoing \
*/ \
CONST char *noPrint; \
\
/* set if can control error checking for individual commands */ \
Boolean hasErrCtl; \
\
/* string to turn error checking on */ \
CONST char *errCheck; \
\
/* string to turn off error checking */ \
CONST char *ignErr; \
\
CONST char *echo; /* command line flag: echo commands */ \
CONST char *exit; /* command line flag: exit on error */ \
}
DEF_SHELL_STRUCT(Shell,);
DEF_SHELL_STRUCT(CShell, const);
/*
* error handling variables
*/
static int errors = 0; /* number of errors reported */
static int aborting = 0; /* why is the make aborting? */
#define ABORT_ERROR 1 /* Because of an error */
#define ABORT_INTERRUPT 2 /* Because it was interrupted */
#define ABORT_WAIT 3 /* Waiting for jobs to finish */
/*
* XXX: Avoid SunOS bug... FILENO() is fp->_file, and file
* is a char! So when we go above 127 we turn negative!
*/
#define FILENO(a) ((unsigned)fileno(a))
/*
* post-make command processing. The node postCommands is really just the
* .END target but we keep it around to avoid having to search for it
* all the time.
*/
static GNode *postCommands;
/*
* The number of commands actually printed for a target. Should this
* number be 0, no shell will be executed.
*/
static int numCommands;
/*
* Return values from JobStart.
*/
#define JOB_RUNNING 0 /* Job is running */
#define JOB_ERROR 1 /* Error in starting the job */
#define JOB_FINISHED 2 /* The job is already finished */
#define JOB_STOPPED 3 /* The job is stopped */
/*
* Descriptions for various shells.
*/
static const struct CShell shells[] = {
/*
* CSH description. The csh can do echo control by playing
* with the setting of the 'echo' shell variable. Sadly,
* however, it is unable to do error control nicely.
*/
{
"csh",
TRUE, "unset verbose", "set verbose", "unset verbose",
FALSE, "echo \"%s\"\n", "csh -c \"%s || exit 0\"",
"v", "e",
},
/*
* SH description. Echo control is also possible and, under
* sun UNIX anyway, one can even control error checking.
*/
{
"sh",
TRUE, "set -", "set -v", "set -",
TRUE, "set -e", "set +e",
#ifdef OLDBOURNESHELL
FALSE, "echo \"%s\"\n", "sh -c '%s || exit 0'\n",
#endif
"v", "e",
},
/*
* KSH description. The Korn shell has a superset of
* the Bourne shell's functionality.
*/
{
"ksh",
TRUE, "set -", "set -v", "set -",
TRUE, "set -e", "set +e",
"v", "e",
},
};
/*
* This is the shell to which we pass all commands in the Makefile.
* It is set by the Job_ParseShell function.
*/
static struct Shell *commandShell = NULL;
char *shellPath = NULL; /* full pathname of executable image */
char *shellName = NULL; /* last component of shell */
int maxJobs; /* The most children we can run at once */
static int nJobs; /* The number of children currently running */
/* The structures that describe them */
static struct JobList jobs = TAILQ_HEAD_INITIALIZER(jobs);
static Boolean jobFull; /* Flag to tell when the job table is full. It
* is set TRUE when (1) the total number of
* running jobs equals the maximum allowed */
#ifdef USE_KQUEUE
static int kqfd; /* File descriptor obtained by kqueue() */
#else
static fd_set outputs; /* Set of descriptors of pipes connected to
* the output channels of children */
#endif
static GNode *lastNode; /* The node for which output was most recently
* produced. */
static const char *targFmt; /* Format string to use to head output from a
* job when it's not the most-recent job heard
* from */
#define TARG_FMT "--- %s ---\n" /* Default format */
#define MESSAGE(fp, gn) \
fprintf(fp, targFmt, gn->name);
/*
* When JobStart attempts to run a job but isn't allowed to
* or when Job_CatchChildren detects a job that has
* been stopped somehow, the job is placed on the stoppedJobs queue to be run
* when the next job finishes.
*
* Lst of Job structures describing jobs that were stopped due to
* concurrency limits or externally
*/
static struct JobList stoppedJobs = TAILQ_HEAD_INITIALIZER(stoppedJobs);
static int fifoFd; /* Fd of our job fifo */
static char fifoName[] = "/tmp/make_fifo_XXXXXXXXX";
static int fifoMaster;
static sig_atomic_t interrupted;
#if defined(USE_PGRP) && defined(SYSV)
# define KILL(pid, sig) killpg(-(pid), (sig))
#else
# if defined(USE_PGRP)
# define KILL(pid, sig) killpg((pid), (sig))
# else
# define KILL(pid, sig) kill((pid), (sig))
# endif
#endif
/*
* Grmpf... There is no way to set bits of the wait structure
* anymore with the stupid W*() macros. I liked the union wait
* stuff much more. So, we devise our own macros... This is
* really ugly, use dramamine sparingly. You have been warned.
*/
#define W_SETMASKED(st, val, fun) \
{ \
int sh = (int)~0; \
int mask = fun(sh); \
\
for (sh = 0; ((mask >> sh) & 1) == 0; sh++) \
continue; \
*(st) = (*(st) & ~mask) | ((val) << sh); \
}
#define W_SETTERMSIG(st, val) W_SETMASKED(st, val, WTERMSIG)
#define W_SETEXITSTATUS(st, val) W_SETMASKED(st, val, WEXITSTATUS)
static void JobRestart(Job *);
static int JobStart(GNode *, int, Job *);
static void JobDoOutput(Job *, Boolean);
static struct Shell *JobMatchShell(const char *);
static void JobInterrupt(int, int);
static void JobRestartJobs(void);
/**
* JobCatchSignal
* Got a signal. Set global variables and hope that someone will
* handle it.
*/
static void
JobCatchSig(int signo)
{
interrupted = signo;
}
/**
* JobPassSig --
* Pass a signal on to all local jobs if
* USE_PGRP is defined, then die ourselves.
*
* Side Effects:
* We die by the same signal.
*/
static void
JobPassSig(int signo)
{
Job *job;
sigset_t nmask, omask;
struct sigaction act;
sigemptyset(&nmask);
sigaddset(&nmask, signo);
sigprocmask(SIG_SETMASK, &nmask, &omask);
DEBUGF(JOB, ("JobPassSig(%d) called.\n", signo));
TAILQ_FOREACH(job, &jobs, link) {
DEBUGF(JOB, ("JobPassSig passing signal %d to child %jd.\n",
signo, (intmax_t)job->pid));
KILL(job->pid, signo);
}
/*
* Deal with proper cleanup based on the signal received. We only run
* the .INTERRUPT target if the signal was in fact an interrupt.
* The other three termination signals are more of a "get out *now*"
* command.
*/
if (signo == SIGINT) {
JobInterrupt(TRUE, signo);
} else if (signo == SIGHUP || signo == SIGTERM || signo == SIGQUIT) {
JobInterrupt(FALSE, signo);
}
/*
* Leave gracefully if SIGQUIT, rather than core dumping.
*/
if (signo == SIGQUIT) {
signo = SIGINT;
}
/*
* 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.
* XXX this comment seems wrong.
*/
act.sa_handler = SIG_DFL;
sigemptyset(&act.sa_mask);
act.sa_flags = 0;
sigaction(signo, &act, NULL);
DEBUGF(JOB, ("JobPassSig passing signal to self, mask = %x.\n",
~0 & ~(1 << (signo - 1))));
signal(signo, SIG_DFL);
KILL(getpid(), signo);
signo = SIGCONT;
TAILQ_FOREACH(job, &jobs, link) {
DEBUGF(JOB, ("JobPassSig passing signal %d to child %jd.\n",
signo, (intmax_t)job->pid));
KILL(job->pid, signo);
}
sigprocmask(SIG_SETMASK, &omask, NULL);
sigprocmask(SIG_SETMASK, &omask, NULL);
act.sa_handler = JobPassSig;
sigaction(signo, &act, 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_Finish when all things are done.
* This function is called from JobStart via LST_FOREACH.
*
* 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(char *cmd, Job *job)
{
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 */
LstNode *cmdNode; /* Node for replacing the command */
noSpecials = (noExecute && !(job->node->type & OP_MAKE));
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) \
DEBUGF(JOB, (fmt, arg)); \
fprintf(job->cmdFILE, fmt, arg); \
fflush(job->cmdFILE);
numCommands += 1;
/*
* For debugging, we replace each command with the result of expanding
* the variables in the command.
*/
cmdNode = Lst_Member(&job->node->commands, cmd);
cmd = Buf_Peel(Var_Subst(NULL, cmd, job->node, FALSE));
cmdStart = cmd;
Lst_Replace(cmdNode, cmdStart);
cmdTemplate = "%s\n";
/*
* Check for leading @', -' or +'s to control echoing, error checking,
* and execution on -n.
*/
while (*cmd == '@' || *cmd == '-' || *cmd == '+') {
switch (*cmd) {
case '@':
shutUp = DEBUG(LOUD) ? FALSE : TRUE;
break;
case '-':
errOff = TRUE;
break;
case '+':
if (noSpecials) {
/*
* We're not actually exececuting anything...
* but this one needs to be - use compat mode
* just for it.
*/
Compat_RunCommand(cmd, job->node);
return (0);
}
break;
}
cmd++;
}
while (isspace((unsigned char)*cmd))
cmd++;
if (shutUp) {
if (!(job->flags & JOB_SILENT) && !noSpecials &&
commandShell->hasEchoCtl) {
DBPRINTF("%s\n", commandShell->echoOff);
} else {
shutUp = FALSE;
}
}
if (errOff) {
if (!(job->flags & JOB_IGNERR) && !noSpecials) {
if (commandShell->hasErrCtl) {
/*
* We don't want the error-control commands
* showing up either, so we turn off echoing
* while executing them. We could put another
* field in the shell structure to tell
* JobDoOutput to look for this string too,
* but why make it any more complex than
* it already is?
*/
if (!(job->flags & JOB_SILENT) && !shutUp &&
commandShell->hasEchoCtl) {
DBPRINTF("%s\n", commandShell->echoOff);
DBPRINTF("%s\n", commandShell->ignErr);
DBPRINTF("%s\n", commandShell->echoOn);
} else {
DBPRINTF("%s\n", commandShell->ignErr);
}
} else if (commandShell->ignErr &&
*commandShell->ignErr != '\0') {
/*
* The shell has no error control, so we need to
* be weird to get it to ignore any errors from
* the command. If echoing is turned on, we turn
* it off and use the errCheck template to echo
* the command. Leave echoing off so the user
* doesn't see the weirdness we go through to
* ignore errors. Set cmdTemplate to use the
* weirdness instead of the simple "%s\n"
* template.
*/
if (!(job->flags & JOB_SILENT) && !shutUp &&
commandShell->hasEchoCtl) {
DBPRINTF("%s\n", commandShell->echoOff);
DBPRINTF(commandShell->errCheck, cmd);
shutUp = TRUE;
}
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;
}
}
DBPRINTF(cmdTemplate, cmd);
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) {
DBPRINTF("%s\n", commandShell->echoOn);
}
return (0);
}
/**
* JobClose --
* Called to close both input and output pipes when a job is finished.
*
* Side Effects:
* The file descriptors associated with the job are closed.
*/
static void
JobClose(Job *job)
{
if (usePipes) {
#if !defined(USE_KQUEUE)
FD_CLR(job->inPipe, &outputs);
#endif
if (job->outPipe != job->inPipe) {
close(job->outPipe);
}
JobDoOutput(job, TRUE);
close(job->inPipe);
} else {
close(job->outFd);
JobDoOutput(job, TRUE);
}
}
/**
* JobFinish --
* Do final processing for the given job including updating
* parents and starting new jobs as available/necessary. Note
* that we pay no attention to the JOB_IGNERR flag here.
* This is because when we're called because of a noexecute flag
* or something, jstat.w_status is 0 and when called from
* Job_CatchChildren, the status is zeroed if it s/b ignored.
*
* Side Effects:
* Some nodes may be put on the toBeMade queue.
* Final commands for the job are placed on postCommands.
*
* If we got an error and are aborting (aborting == ABORT_ERROR) and
* the job list is now empty, we are done for the day.
* If we recognized an error (errors !=0), we set the aborting flag
* to ABORT_ERROR so no more jobs will be started.
*/
static void
JobFinish(Job *job, int *status)
{
Boolean done;
LstNode *ln;
if ((WIFEXITED(*status) && WEXITSTATUS(*status) != 0 &&
!(job->flags & JOB_IGNERR)) ||
(WIFSIGNALED(*status) && WTERMSIG(*status) != SIGCONT)) {
/*
* 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) {
fclose(job->cmdFILE);
}
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 || WIFSTOPPED(*status) ||
(WIFSIGNALED(*status) && WTERMSIG(*status) == SIGCONT) ||
DEBUG(JOB)) {
FILE *out;
if (compatMake && !usePipes && (job->flags & JOB_IGNERR)) {
/*
* If output is going to a file and this job is ignoring
* errors, arrange to have the exit status sent to the
* output file as well.
*/
out = fdopen(job->outFd, "w");
if (out == NULL)
Punt("Cannot fdopen");
} else {
out = stdout;
}
if (WIFEXITED(*status)) {
DEBUGF(JOB, ("Process %jd exited.\n",
(intmax_t)job->pid));
if (WEXITSTATUS(*status) != 0) {
if (usePipes && job->node != lastNode) {
MESSAGE(out, job->node);
lastNode = job->node;
}
fprintf(out, "*** Error code %d%s\n",
WEXITSTATUS(*status),
(job->flags & JOB_IGNERR) ?
"(ignored)" : "");
if (job->flags & JOB_IGNERR) {
*status = 0;
}
} else if (DEBUG(JOB)) {
if (usePipes && job->node != lastNode) {
MESSAGE(out, job->node);
lastNode = job->node;
}
fprintf(out, "*** Completed successfully\n");
}
} else if (WIFSTOPPED(*status)) {
DEBUGF(JOB, ("Process %jd stopped.\n",
(intmax_t)job->pid));
if (usePipes && job->node != lastNode) {
MESSAGE(out, job->node);
lastNode = job->node;
}
fprintf(out, "*** Stopped -- signal %d\n",
WSTOPSIG(*status));
job->flags |= JOB_RESUME;
TAILQ_INSERT_TAIL(&stoppedJobs, job, link);
fflush(out);
return;
} else if (WTERMSIG(*status) == SIGCONT) {
/*
* If the beastie has continued, shift the Job from
* the stopped list to the running one (or re-stop it
* if concurrency is exceeded) and go and get another
* child.
*/
if (job->flags & (JOB_RESUME | JOB_RESTART)) {
if (usePipes && job->node != lastNode) {
MESSAGE(out, job->node);
lastNode = job->node;
}
fprintf(out, "*** Continued\n");
}
if (!(job->flags & JOB_CONTINUING)) {
DEBUGF(JOB, ("Warning: process %jd was not "
"continuing.\n", (intmax_t)job->pid));
#ifdef notdef
/*
* We don't really want to restart a job from
* scratch just because it continued, especially
* not without killing the continuing process!
* That's why this is ifdef'ed out.
* FD - 9/17/90
*/
JobRestart(job);
#endif
}
job->flags &= ~JOB_CONTINUING;
TAILQ_INSERT_TAIL(&jobs, job, link);
nJobs += 1;
DEBUGF(JOB, ("Process %jd is continuing locally.\n",
(intmax_t)job->pid));
if (nJobs == maxJobs) {
jobFull = TRUE;
DEBUGF(JOB, ("Job queue is full.\n"));
}
fflush(out);
return;
} else {
if (usePipes && job->node != lastNode) {
MESSAGE(out, job->node);
lastNode = job->node;
}
fprintf(out, "*** Signal %d\n", WTERMSIG(*status));
}
fflush(out);
}
/*
* Now handle the -B-mode stuff. If the beast still isn't finished,
* try and restart the job on the next command. If JobStart says it's
* ok, it's ok. If there's an error, this puppy is done.
*/
if (compatMake && WIFEXITED(*status) &&
Lst_Succ(job->node->compat_command) != NULL) {
switch (JobStart(job->node, job->flags & JOB_IGNDOTS, job)) {
case JOB_RUNNING:
done = FALSE;
break;
case JOB_ERROR:
done = TRUE;
W_SETEXITSTATUS(status, 1);
break;
case JOB_FINISHED:
/*
* If we got back a JOB_FINISHED code, JobStart has
* already called Make_Update and freed the job
* descriptor. We set done to false here to avoid fake
* cycles and double frees. JobStart needs to do the
* update so we can proceed up the graph when given
* the -n flag..
*/
done = FALSE;
break;
default:
break;
}
} else {
done = TRUE;
}
if (done && aborting != ABORT_ERROR &&
aborting != ABORT_INTERRUPT && *status == 0) {
/*
* As long as we aren't aborting and the job didn't return a
* non-zero status that we shouldn't ignore, we call
* Make_Update to update the parents. In addition, any saved
* commands for the node are placed on the .END target.
*/
for (ln = job->tailCmds; ln != NULL; ln = LST_NEXT(ln)) {
Lst_AtEnd(&postCommands->commands,
Buf_Peel(Var_Subst(NULL, Lst_Datum(ln),
job->node, FALSE)));
}
job->node->made = MADE;
Make_Update(job->node);
free(job);
} else if (*status != 0) {
errors += 1;
free(job);
}
JobRestartJobs();
/*
* Set aborting if any error.
*/
if (errors && !keepgoing && aborting != ABORT_INTERRUPT) {
/*
* If we found any errors in this batch of children and the -k
* flag wasn't given, we set the aborting flag so no more jobs
* get started.
*/
aborting = ABORT_ERROR;
}
if (aborting == ABORT_ERROR && Job_Empty()) {
/*
* If we are aborting and the job table is now empty, we finish.
*/
Finish(errors);
}
}
/**
* Job_Touch
* Touch the given target. Called by JobStart when the -t flag was
* given. Prints messages unless told to be silent.
*
* 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_EXEC | OP_OPTIONAL)) {
/*
* .JOIN, .USE, .ZEROTIME and .OPTIONAL targets are "virtual"
* targets and, as such, shouldn't really be created.
*/
return;
}
if (!silent) {
fprintf(stdout, "touch %s\n", gn->name);
fflush(stdout);
}
if (noExecute) {
return;
}
if (gn->type & OP_ARCHV) {
Arch_Touch(gn);
} else if (gn->type & OP_LIB) {
Arch_TouchLib(gn);
} else {
char *file = gn->path ? gn->path : gn->name;
times.actime = times.modtime = now;
if (utime(file, &times) < 0) {
streamID = open(file, O_RDWR | O_CREAT, 0666);
if (streamID >= 0) {
char c;
/*
* Read and write a byte to the file to change
* the modification time, then close the file.
*/
if (read(streamID, &c, 1) == 1) {
lseek(streamID, (off_t)0, SEEK_SET);
write(streamID, &c, 1);
}
close(streamID);
} else {
fprintf(stdout, "*** couldn't touch %s: %s",
file, strerror(errno));
fflush(stdout);
}
}
}
}
/**
* Job_CheckCommands
* Make sure the given node has all the commands it needs.
*
* 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) {
/*
* No commands. Look for .DEFAULT rule from which we might infer
* commands.
*/
if (DEFAULT != NULL && !Lst_IsEmpty(&DEFAULT->commands)) {
char *p1;
/*
* Make only looks for a .DEFAULT if the node was
* never the target of an operator, so that's what we
* do too. If a .DEFAULT was given, we substitute its
* commands for gn's commands and set the IMPSRC
* variable to be the target's name The DEFAULT node
* acts like a transformation rule, in that gn also
* inherits any attributes or sources attached to
* .DEFAULT itself.
*/
Make_HandleUse(DEFAULT, gn);
Var_Set(IMPSRC, Var_Value(TARGET, gn, &p1), gn);
free(p1);
} else if (Dir_MTime(gn) == 0) {
/*
* The node wasn't the target of an operator we have
* no .DEFAULT rule to go on and the target doesn't
* already exist. There's nothing more we can do for
* this branch. If the -k flag wasn't given, we stop
* in our tracks, otherwise we just don't update
* this node's parents so they never get examined.
*/
static const char msg[] =
"make: don't know how to make";
if (gn->type & OP_OPTIONAL) {
fprintf(stdout, "%s %s(ignored)\n",
msg, gn->name);
fflush(stdout);
} else if (keepgoing) {
fprintf(stdout, "%s %s(continuing)\n",
msg, gn->name);
fflush(stdout);
return (FALSE);
} else {
#if OLD_JOKE
if (strcmp(gn->name,"love") == 0)
(*abortProc)("Not war.");
else
#endif
(*abortProc)("%s %s. Stop",
msg, gn->name);
return (FALSE);
}
}
}
return (TRUE);
}
/**
* JobExec
* Execute the shell for the given job. Called from JobStart and
* JobRestart.
*
* 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)
{
pid_t cpid; /* ID of new child */
if (DEBUG(JOB)) {
int i;
DEBUGF(JOB, ("Running %s\n", job->node->name));
DEBUGF(JOB, ("\tCommand: "));
for (i = 0; argv[i] != NULL; i++) {
DEBUGF(JOB, ("%s ", argv[i]));
}
DEBUGF(JOB, ("\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_FIRST) &&
!(job->flags & JOB_SILENT)) {
MESSAGE(stdout, job->node);
lastNode = job->node;
}
if ((cpid = vfork()) == -1)
Punt("Cannot fork");
if (cpid == 0) {
/*
* Child
*/
if (fifoFd >= 0)
close(fifoFd);
/*
* 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)
Punt("Cannot dup2: %s", strerror(errno));
fcntl(0, F_SETFD, 0);
lseek(0, (off_t)0, SEEK_SET);
if (usePipes) {
/*
* Set up the child's output to be routed through the
* pipe we've created for it.
*/
if (dup2(job->outPipe, 1) == -1)
Punt("Cannot dup2: %s", strerror(errno));
} else {
/*
* We're capturing output in a file, so we duplicate the
* descriptor to the temporary file into the standard
* output.
*/
if (dup2(job->outFd, 1) == -1)
Punt("Cannot dup2: %s", strerror(errno));
}
/*
* 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.
*/
fcntl(1, F_SETFD, 0);
if (dup2(1, 2) == -1)
Punt("Cannot dup2: %s", strerror(errno));
#ifdef USE_PGRP
/*
* We want to switch the child into a different process family
* so we can kill it and all its descendants in one fell swoop,
* by killing its process family, but not commit suicide.
*/
# if defined(SYSV)
setsid();
# else
setpgid(0, getpid());
# endif
#endif /* USE_PGRP */
execv(shellPath, argv);
write(STDERR_FILENO, "Could not execute shell\n",
sizeof("Could not execute shell"));
_exit(1);
}
/*
* Parent
*/
job->pid = cpid;
if (usePipes && (job->flags & JOB_FIRST)) {
/*
* The first time a job is run for a node, we set the
* current position in the buffer to the beginning and
* mark another stream to watch in the outputs mask.
*/
#ifdef USE_KQUEUE
struct kevent kev[2];
#endif
job->curPos = 0;
#if defined(USE_KQUEUE)
EV_SET(&kev[0], job->inPipe, EVFILT_READ, EV_ADD, 0, 0, job);
EV_SET(&kev[1], job->pid, EVFILT_PROC,
EV_ADD | EV_ONESHOT, NOTE_EXIT, 0, NULL);
if (kevent(kqfd, kev, 2, NULL, 0, NULL) != 0) {
/*
* kevent() will fail if the job is already
* finished
*/
if (errno != EINTR && errno != EBADF && errno != ESRCH)
Punt("kevent: %s", strerror(errno));
}
#else
FD_SET(job->inPipe, &outputs);
#endif /* USE_KQUEUE */
}
if (job->cmdFILE != NULL && job->cmdFILE != stdout) {
fclose(job->cmdFILE);
job->cmdFILE = NULL;
}
/*
* Now the job is actually running, add it to the table.
*/
nJobs += 1;
TAILQ_INSERT_TAIL(&jobs, job, link);
if (nJobs == maxJobs) {
jobFull = TRUE;
}
}
/**
* JobMakeArgv
* Create the argv needed to execute the shell for a given job.
*/
static void
JobMakeArgv(Job *job, char **argv)
{
int argc;
static char args[10]; /* For merged arguments */
argv[0] = 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.
*/
sprintf(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] = commandShell->exit;
argc++;
}
if (!(job->flags & JOB_SILENT) && commandShell->echo) {
argv[argc] = commandShell->echo;
argc++;
}
}
argv[argc] = NULL;
}
/**
* JobRestart
* Restart a job that stopped for some reason. The job must be neither
* on the jobs nor on the stoppedJobs list.
*
* Side Effects:
* jobFull will be set if the job couldn't be run.
*/
static void
JobRestart(Job *job)
{
if (job->flags & JOB_RESTART) {
/*
* Set up the control arguments to the shell. This is based on
* the flags set earlier for this job. If the JOB_IGNERR flag
* is clear, the 'exit' flag of the commandShell is used to
* cause it to exit upon receiving an error. If the JOB_SILENT
* flag is clear, the 'echo' flag of the commandShell is used
* to get it to start echoing as soon as it starts
* processing commands.
*/
char *argv[4];
JobMakeArgv(job, argv);
DEBUGF(JOB, ("Restarting %s...", job->node->name));
if (nJobs >= maxJobs && !(job->flags & JOB_SPECIAL)) {
/*
* Not allowed to run -- put it back on the hold
* queue and mark the table full
*/
DEBUGF(JOB, ("holding\n"));
TAILQ_INSERT_HEAD(&stoppedJobs, job, link);
jobFull = TRUE;
DEBUGF(JOB, ("Job queue is full.\n"));
return;
} else {
/*
* Job may be run locally.
*/
DEBUGF(JOB, ("running locally\n"));
}
JobExec(job, argv);
} else {
/*
* The job has stopped and needs to be restarted.
* Why it stopped, we don't know...
*/
DEBUGF(JOB, ("Resuming %s...", job->node->name));
if ((nJobs < maxJobs || ((job->flags & JOB_SPECIAL) &&
maxJobs == 0)) && nJobs != maxJobs) {
/*
* If we haven't reached the concurrency limit already
* (or the job must be run and maxJobs is 0), it's ok
* to resume it.
*/
Boolean error;
int status;
error = (KILL(job->pid, SIGCONT) != 0);
if (!error) {
/*
* Make sure the user knows we've continued
* the beast and actually put the thing in the
* job table.
*/
job->flags |= JOB_CONTINUING;
status = 0;
W_SETTERMSIG(&status, SIGCONT);
JobFinish(job, &status);
job->flags &= ~(JOB_RESUME|JOB_CONTINUING);
DEBUGF(JOB, ("done\n"));
} else {
Error("couldn't resume %s: %s",
job->node->name, strerror(errno));
status = 0;
W_SETEXITSTATUS(&status, 1);
JobFinish(job, &status);
}
} else {
/*
* Job cannot be restarted. Mark the table as full and
* place the job back on the list of stopped jobs.
*/
DEBUGF(JOB, ("table full\n"));
TAILQ_INSERT_HEAD(&stoppedJobs, job, link);
jobFull = TRUE;
DEBUGF(JOB, ("Job queue is full.\n"));
}
}
}
/**
* JobStart
* Start a target-creation process going for the target described
* by the graph node gn.
*
* Results:
* JOB_ERROR if there was an error in the commands, JOB_FINISHED
* if there isn't actually anything left to do for the job and
* JOB_RUNNING if the job has been started.
*
* Side Effects:
* A new Job node is created and added to the list of running
* jobs. PMake is forked and a child shell created.
*/
static int
JobStart(GNode *gn, int flags, Job *previous)
{
Job *job; /* new job descriptor */
char *argv[4]; /* 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 for temp file */
LstNode *ln;
char tfile[sizeof(TMPPAT)];
if (interrupted) {
JobPassSig(interrupted);
return (JOB_ERROR);
}
if (previous != NULL) {
previous->flags &= ~(JOB_FIRST | JOB_IGNERR | JOB_SILENT);
job = previous;
} else {
job = emalloc(sizeof(Job));
flags |= JOB_FIRST;
}
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.
*/
if (!compatMake && (job->flags & JOB_FIRST)) {
cmdsOK = Job_CheckCommands(gn, Error);
} else {
cmdsOK = TRUE;
}
/*
* 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) || (!noExecute && !touchFlag)) {
/*
* We're serious here, but if the commands were bogus, we're
* also dead...
*/
if (!cmdsOK) {
DieHorribly();
}
strcpy(tfile, TMPPAT);
if ((tfd = mkstemp(tfile)) == -1)
Punt("Cannot create temp file: %s", strerror(errno));
job->cmdFILE = fdopen(tfd, "w+");
eunlink(tfile);
if (job->cmdFILE == NULL) {
close(tfd);
Punt("Could not open %s", tfile);
}
fcntl(FILENO(job->cmdFILE), F_SETFD, 1);
/*
* Send the commands to the command file, flush all its
* buffers then rewind and remove the thing.
*/
noExec = FALSE;
/*
* Used to be backwards; replace when start doing multiple
* commands per shell.
*/
if (compatMake) {
/*
* Be compatible: If this is the first time for this
* node, verify its commands are ok and open the
* commands list for sequential access by later
* invocations of JobStart. Once that is done, we take
* the next command off the list and print it to the
* command file. If the command was an ellipsis, note
* that there's nothing more to execute.
*/
if (job->flags & JOB_FIRST)
gn->compat_command = Lst_First(&gn->commands);
else
gn->compat_command =
Lst_Succ(gn->compat_command);
if (gn->compat_command == NULL ||
JobPrintCommand(Lst_Datum(gn->compat_command), job))
noExec = TRUE;
if (noExec && !(job->flags & JOB_FIRST)) {
/*
* If we're not going to execute anything, the
* job is done and we need to close down the
* various file descriptors we've opened for
* output, then call JobDoOutput to catch the
* final characters or send the file to the
* screen... Note that the i/o streams are only
* open if this isn't the first job. Note also
* that this could not be done in
* Job_CatchChildren b/c it wasn't clear if
* there were more commands to execute or not...
*/
JobClose(job);
}
} else {
/*
* We can do all the commands at once. hooray for sanity
*/
numCommands = 0;
LST_FOREACH(ln, &gn->commands) {
if (JobPrintCommand(Lst_Datum(ln), job))
break;
}
/*
* If we didn't print out any commands to the shell
* script, there's not much point in executing the
* shell, is there?
*/
if (numCommands == 0) {
noExec = TRUE;
}
}
} else if (noExecute) {
/*
* 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(ln, &gn->commands) {
if (JobPrintCommand(Lst_Datum(ln), job))
break;
}
}
/*
* Don't execute the shell, thank you.
*/
noExec = TRUE;
} else {
/*
* Just touch the target and note that no shell should be
* executed. Set cmdFILE to stdout to make life easier. Check
* the commands, too, but don't die if they're no good -- it
* does no harm to keep working up the graph.
*/
job->cmdFILE = stdout;
Job_Touch(gn, job->flags & JOB_SILENT);
noExec = TRUE;
}
/*
* If we're not supposed to execute a shell, don't.
*/
if (noExec) {
/*
* Unlink and close the command file if we opened one
*/
if (job->cmdFILE != stdout) {
if (job->cmdFILE != NULL)
fclose(job->cmdFILE);
} else {
fflush(stdout);
}
/*
* We only want to work our way up the graph if we aren't here
* because the commands for the job were no good.
*/
if (cmdsOK) {
if (aborting == 0) {
for (ln = job->tailCmds; ln != NULL;
ln = LST_NEXT(ln)) {
Lst_AtEnd(&postCommands->commands,
Buf_Peel(Var_Subst(NULL,
Lst_Datum(ln), job->node, FALSE)));
}
job->node->made = MADE;
Make_Update(job->node);
}
free(job);
return(JOB_FINISHED);
} else {
free(job);
return(JOB_ERROR);
}
} else {
fflush(job->cmdFILE);
}
/*
* Set up the control arguments to the shell. This is based on the flags
* set earlier for this job.
*/
JobMakeArgv(job, argv);
/*
* If we're using pipes to catch output, create the pipe by which we'll
* get the shell's output. If we're using files, print out that we're
* starting a job and then set up its temporary-file name.
*/
if (!compatMake || (job->flags & JOB_FIRST)) {
if (usePipes) {
int fd[2];
if (pipe(fd) == -1)
Punt("Cannot create pipe: %s", strerror(errno));
job->inPipe = fd[0];
job->outPipe = fd[1];
fcntl(job->inPipe, F_SETFD, 1);
fcntl(job->outPipe, F_SETFD, 1);
} else {
fprintf(stdout, "Remaking `%s'\n", gn->name);
fflush(stdout);
strcpy(job->outFile, TMPPAT);
if ((job->outFd = mkstemp(job->outFile)) == -1)
Punt("cannot create temp file: %s",
strerror(errno));
fcntl(job->outFd, F_SETFD, 1);
}
}
if (nJobs >= maxJobs && !(job->flags & JOB_SPECIAL) && maxJobs != 0) {
/*
* We've hit the limit of concurrency, so put the job on hold
* until some other job finishes. Note that the special jobs
* (.BEGIN, .INTERRUPT and .END) may be run even when the
* limit has been reached (e.g. when maxJobs == 0).
*/
jobFull = TRUE;
DEBUGF(JOB, ("Can only run job locally.\n"));
job->flags |= JOB_RESTART;
TAILQ_INSERT_TAIL(&stoppedJobs, job, link);
} else {
if (nJobs >= maxJobs) {
/*
* If we're running this job as a special case
* (see above), at least say the table is full.
*/
jobFull = TRUE;
DEBUGF(JOB, ("Local job queue is full.\n"));
}
JobExec(job, argv);
}
return (JOB_RUNNING);
}
static char *
JobOutput(Job *job, char *cp, char *endp, int msg)
{
char *ecp;
if (commandShell->noPrint) {
ecp = strstr(cp, commandShell->noPrint);
while (ecp != NULL) {
if (cp != ecp) {
*ecp = '\0';
if (msg && job->node != lastNode) {
MESSAGE(stdout, job->node);
lastNode = job->node;
}
/*
* The only way there wouldn't be a newline
* after this line is if it were the last in
* the buffer. However, since the non-printable
* comes after it, there must be a newline, so
* we don't print one.
*/
fprintf(stdout, "%s", cp);
fflush(stdout);
}
cp = ecp + strlen(commandShell->noPrint);
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 = strstr(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.
*
* Side Effects:
* curPos may be shifted as may the contents of outBuf.
*/
static void
JobDoOutput(Job *job, Boolean finish)
{
Boolean gotNL = FALSE; /* true if got a newline */
Boolean fbuf; /* true if our buffer filled up */
int nr; /* number of bytes read */
int i; /* auxiliary index into outBuf */
int max; /* limit for i (end of current data) */
int nRead; /* (Temporary) number of bytes read */
FILE *oFILE; /* Stream pointer to shell's output file */
char inLine[132];
if (usePipes) {
/*
* Read as many bytes as will fit in the buffer.
*/
end_loop:
gotNL = FALSE;
fbuf = FALSE;
nRead = read(job->inPipe, &job->outBuf[job->curPos],
JOB_BUFSIZE - job->curPos);
/*
* Check for interrupt here too, because the above read may
* block when the child process is stopped. In this case the
* interrupt will unblock it (we don't use SA_RESTART).
*/
if (interrupted)
JobPassSig(interrupted);
if (nRead < 0) {
DEBUGF(JOB, ("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 buffer. This time,
* though, we know there's no newline at the
* end, so we add one of our own free will.
*/
if (*cp != '\0') {
if (job->node != lastNode) {
MESSAGE(stdout, job->node);
lastNode = job->node;
}
fprintf(stdout, "%s%s", cp,
gotNL ? "\n" : "");
fflush(stdout);
}
}
if (i < max - 1) {
/* shift the remaining characters down */
memcpy(job->outBuf, &job->outBuf[i + 1],
max - (i + 1));
job->curPos = max - (i + 1);
} else {
/*
* We have written everything out, so we just
* start over from the start of the buffer.
* No copying. No nothing.
*/
job->curPos = 0;
}
}
if (finish) {
/*
* If the finish flag is true, we must loop until we hit
* end-of-file on the pipe. This is guaranteed to happen
* eventually since the other end of the pipe is now
* closed (we closed it explicitly and the child has
* exited). When we do get an EOF, finish will be set
* FALSE and we'll fall through and out.
*/
goto end_loop;
}
} else {
/*
* We've been called to retrieve the output of the job from the
* temporary file where it's been squirreled away. This consists
* of opening the file, reading the output line by line, being
* sure not to print the noPrint line for the shell we used,
* then close and remove the temporary file. Very simple.
*
* Change to read in blocks and do FindSubString type things
* as for pipes? That would allow for "@echo -n..."
*/
oFILE = fopen(job->outFile, "r");
if (oFILE != NULL) {
fprintf(stdout, "Results of making %s:\n",
job->node->name);
fflush(stdout);
while (fgets(inLine, sizeof(inLine), oFILE) != NULL) {
char *cp, *endp, *oendp;
cp = inLine;
oendp = endp = inLine + strlen(inLine);
if (endp[-1] == '\n') {
*--endp = '\0';
}
cp = JobOutput(job, inLine, endp, FALSE);
/*
* There's still more in that buffer. This time,
* though, we know there's no newline at the
* end, so we add one of our own free will.
*/
fprintf(stdout, "%s", cp);
fflush(stdout);
if (endp != oendp) {
fprintf(stdout, "\n");
fflush(stdout);
}
}
fclose(oFILE);
eunlink(job->outFile);
}
}
}
/**
* Job_CatchChildren
* Handle the exit of a child. Called from Make_Make.
*
* Side Effects:
* The job descriptor is removed from the list of children.
*
* Notes:
* We do waits, blocking or not, according to the wisdom of our
* caller, until there are no more children to report. For each
* job, call JobFinish to finish things off. This will take care of
* putting jobs on the stoppedJobs queue.
*/
void
Job_CatchChildren(Boolean block)
{
pid_t pid; /* pid of dead child */
Job *job; /* job descriptor for dead child */
int status; /* Exit/termination status */
/*
* Don't even bother if we know there's no one around.
*/
if (nJobs == 0) {
return;
}
for (;;) {
pid = waitpid((pid_t)-1, &status,
(block ? 0 : WNOHANG) | WUNTRACED);
if (pid <= 0)
break;
DEBUGF(JOB, ("Process %jd exited or stopped.\n",
(intmax_t)pid));
TAILQ_FOREACH(job, &jobs, link) {
if (job->pid == pid)
break;
}
if (job == NULL) {
if (WIFSIGNALED(status) &&
(WTERMSIG(status) == SIGCONT)) {
TAILQ_FOREACH(job, &jobs, link) {
if (job->pid == pid)
break;
}
if (job == NULL) {
Error("Resumed child (%jd) "
"not in table", (intmax_t)pid);
continue;
}
TAILQ_REMOVE(&stoppedJobs, job, link);
} else {
Error("Child (%jd) not in table?",
(intmax_t)pid);
continue;
}
} else {
TAILQ_REMOVE(&jobs, job, link);
nJobs -= 1;
if (fifoFd >= 0 && maxJobs > 1) {
write(fifoFd, "+", 1);
maxJobs--;
if (nJobs >= maxJobs)
jobFull = TRUE;
else
jobFull = FALSE;
} else {
DEBUGF(JOB, ("Job queue is no longer full.\n"));
jobFull = FALSE;
}
}
JobFinish(job, &status);
}
if (interrupted)
JobPassSig(interrupted);
}
/**
* 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.
*
* Side Effects:
* Output is read from pipes if we're piping.
* -----------------------------------------------------------------------
*/
void
#ifdef USE_KQUEUE
Job_CatchOutput(int flag __unused)
#else
Job_CatchOutput(int flag)
#endif
{
int nfds;
#ifdef USE_KQUEUE
#define KEV_SIZE 4
struct kevent kev[KEV_SIZE];
int i;
#else
struct timeval timeout;
fd_set readfds;
Job *job;
#endif
fflush(stdout);
if (usePipes) {
#ifdef USE_KQUEUE
if ((nfds = kevent(kqfd, NULL, 0, kev, KEV_SIZE, NULL)) == -1) {
if (errno != EINTR)
Punt("kevent: %s", strerror(errno));
if (interrupted)
JobPassSig(interrupted);
} else {
for (i = 0; i < nfds; i++) {
if (kev[i].flags & EV_ERROR) {
warnc(kev[i].data, "kevent");
continue;
}
switch (kev[i].filter) {
case EVFILT_READ:
JobDoOutput(kev[i].udata, FALSE);
break;
case EVFILT_PROC:
/*
* Just wake up and let
* Job_CatchChildren() collect the
* terminated job.
*/
break;
}
}
}
#else
readfds = outputs;
timeout.tv_sec = SEL_SEC;
timeout.tv_usec = SEL_USEC;
if (flag && jobFull && fifoFd >= 0)
FD_SET(fifoFd, &readfds);
nfds = select(FD_SETSIZE, &readfds, (fd_set *)NULL,
(fd_set *)NULL, &timeout);
if (nfds <= 0) {
if (interrupted)
JobPassSig(interrupted);
return;
}
if (fifoFd >= 0 && FD_ISSET(fifoFd, &readfds)) {
if (--nfds <= 0)
return;
}
job = TAILQ_FIRST(&jobs);
while (nfds != 0 && job != NULL) {
if (FD_ISSET(job->inPipe, &readfds)) {
JobDoOutput(job, FALSE);
nfds--;
}
job = TAILQ_NEXT(job, link);
}
#endif /* !USE_KQUEUE */
}
}
/**
* Job_Make
* Start the creation of a target. Basically a front-end for
* JobStart used by the Make module.
*
* Side Effects:
* Another job is started.
*/
void
Job_Make(GNode *gn)
{
JobStart(gn, 0, NULL);
}
/**
* JobCopyShell
* Make a new copy of the shell structure including a copy of the strings
* in it. This also defaults some fields in case they are NULL.
*
* Returns:
* The function returns a pointer to the new shell structure.
*/
static struct Shell *
JobCopyShell(const struct Shell *osh)
{
struct Shell *nsh;
nsh = emalloc(sizeof(*nsh));
nsh->name = estrdup(osh->name);
if (osh->echoOff != NULL)
nsh->echoOff = estrdup(osh->echoOff);
else
nsh->echoOff = NULL;
if (osh->echoOn != NULL)
nsh->echoOn = estrdup(osh->echoOn);
else
nsh->echoOn = NULL;
nsh->hasEchoCtl = osh->hasEchoCtl;
if (osh->noPrint != NULL)
nsh->noPrint = estrdup(osh->noPrint);
else
nsh->noPrint = NULL;
nsh->hasErrCtl = osh->hasErrCtl;
if (osh->errCheck == NULL)
nsh->errCheck = estrdup("");
else
nsh->errCheck = estrdup(osh->errCheck);
if (osh->ignErr == NULL)
nsh->ignErr = estrdup("%s");
else
nsh->ignErr = estrdup(osh->ignErr);
if (osh->echo == NULL)
nsh->echo = estrdup("");
else
nsh->echo = estrdup(osh->echo);
if (osh->exit == NULL)
nsh->exit = estrdup("");
else
nsh->exit = estrdup(osh->exit);
return (nsh);
}
/**
* JobFreeShell
* Free a shell structure and all associated strings.
*/
static void
JobFreeShell(struct Shell *sh)
{
if (sh != NULL) {
free(sh->name);
free(sh->echoOff);
free(sh->echoOn);
free(sh->noPrint);
free(sh->errCheck);
free(sh->ignErr);
free(sh->echo);
free(sh->exit);
free(sh);
}
}
void
Shell_Init(void)
{
if (commandShell == NULL)
commandShell = JobMatchShell(shells[DEFSHELL].name);
if (shellPath == NULL) {
/*
* The user didn't specify a shell to use, so we are using the
* default one... Both the absolute path and the last component
* must be set. The last component is taken from the 'name'
* field of the default shell description pointed-to by
* commandShell. All default shells are located in
* PATH_DEFSHELLDIR.
*/
shellName = commandShell->name;
shellPath = str_concat(PATH_DEFSHELLDIR, shellName,
STR_ADDSLASH);
}
}
/**
* Job_Init
* Initialize the process module, given a maximum number of jobs.
*
* Side Effects:
* lists and counters are initialized
*/
void
Job_Init(int maxproc)
{
GNode *begin; /* node for commands to do at the very start */
const char *env;
struct sigaction sa;
fifoFd = -1;
env = getenv("MAKE_JOBS_FIFO");
if (env == NULL && maxproc > 1) {
/*
* We did not find the environment variable so we are the
* leader. Create the fifo, open it, write one char per
* allowed job into the pipe.
*/
mktemp(fifoName);
if (!mkfifo(fifoName, 0600)) {
fifoFd = open(fifoName, O_RDWR | O_NONBLOCK, 0);
if (fifoFd >= 0) {
fifoMaster = 1;
fcntl(fifoFd, F_SETFL, O_NONBLOCK);
env = fifoName;
setenv("MAKE_JOBS_FIFO", env, 1);
while (maxproc-- > 0) {
write(fifoFd, "+", 1);
}
/* The master make does not get a magic token */
jobFull = TRUE;
maxJobs = 0;
} else {
unlink(fifoName);
env = NULL;
}
}
} else if (env != NULL) {
/*
* We had the environment variable so we are a slave.
* Open fifo and give ourselves a magic token which represents
* the token our parent make has grabbed to start his make
* process. Otherwise the sub-makes would gobble up tokens and
* the proper number of tokens to specify to -j would depend
* on the depth of the tree and the order of execution.
*/
fifoFd = open(env, O_RDWR, 0);
if (fifoFd >= 0) {
fcntl(fifoFd, F_SETFL, O_NONBLOCK);
maxJobs = 1;
jobFull = FALSE;
}
}
if (fifoFd <= 0) {
maxJobs = maxproc;
jobFull = FALSE;
} else {
}
nJobs = 0;
aborting = 0;
errors = 0;
lastNode = NULL;
if ((maxJobs == 1 && fifoFd < 0) || beVerbose == 0) {
/*
* If only one job can run at a time, there's no need for a
* banner, no is there?
*/
targFmt = "";
} else {
targFmt = TARG_FMT;
}
Shell_Init();
/*
* Catch the four signals that POSIX specifies if they aren't ignored.
* JobCatchSignal will just set global variables and hope someone
* else is going to handle the interrupt.
*/
sa.sa_handler = JobCatchSig;
sigemptyset(&sa.sa_mask);
sa.sa_flags = 0;
if (signal(SIGINT, SIG_IGN) != SIG_IGN) {
sigaction(SIGINT, &sa, NULL);
}
if (signal(SIGHUP, SIG_IGN) != SIG_IGN) {
sigaction(SIGHUP, &sa, NULL);
}
if (signal(SIGQUIT, SIG_IGN) != SIG_IGN) {
sigaction(SIGQUIT, &sa, NULL);
}
if (signal(SIGTERM, SIG_IGN) != SIG_IGN) {
sigaction(SIGTERM, &sa, NULL);
}
/*
* There are additional signals that need to be caught and passed if
* either the export system wants to be told directly of signals or if
* we're giving each job its own process group (since then it won't get
* signals from the terminal driver as we own the terminal)
*/
#if defined(USE_PGRP)
if (signal(SIGTSTP, SIG_IGN) != SIG_IGN) {
sigaction(SIGTSTP, &sa, NULL);
}
if (signal(SIGTTOU, SIG_IGN) != SIG_IGN) {
sigaction(SIGTTOU, &sa, NULL);
}
if (signal(SIGTTIN, SIG_IGN) != SIG_IGN) {
sigaction(SIGTTIN, &sa, NULL);
}
if (signal(SIGWINCH, SIG_IGN) != SIG_IGN) {
sigaction(SIGWINCH, &sa, NULL);
}
#endif
#ifdef USE_KQUEUE
if ((kqfd = kqueue()) == -1) {
Punt("kqueue: %s", strerror(errno));
}
#endif
begin = Targ_FindNode(".BEGIN", TARG_NOCREATE);
if (begin != NULL) {
JobStart(begin, JOB_SPECIAL, (Job *)NULL);
while (nJobs) {
Job_CatchOutput(0);
Job_CatchChildren(!usePipes);
}
}
postCommands = Targ_FindNode(".END", TARG_CREATE);
}
/**
* Job_Full
* See if the job table is full. It is considered full if it is OR
* if we are in the process of aborting OR if we have
* reached/exceeded our local quota. This prevents any more jobs
* from starting up.
*
* Results:
* TRUE if the job table is full, FALSE otherwise
*/
Boolean
Job_Full(void)
{
char c;
int i;
if (aborting)
return (aborting);
if (fifoFd >= 0 && jobFull) {
i = read(fifoFd, &c, 1);
if (i > 0) {
maxJobs++;
jobFull = FALSE;
}
}
return (jobFull);
}
/**
* Job_Empty
* See if the job table is empty. Because the local concurrency may
* be set to 0, it is possible for the job table to become empty,
* while the list of stoppedJobs remains non-empty. In such a case,
* we want to restart as many jobs as we can.
*
* Results:
* TRUE if it is. FALSE if it ain't.
*/
Boolean
Job_Empty(void)
{
if (nJobs == 0) {
if (!TAILQ_EMPTY(&stoppedJobs) && !aborting) {
/*
* The job table is obviously not full if it has no
* jobs in it...Try and restart the stopped jobs.
*/
jobFull = FALSE;
JobRestartJobs();
return (FALSE);
} else {
return (TRUE);
}
} else {
return (FALSE);
}
}
/**
* JobMatchShell
* Find a matching shell in 'shells' given its final component.
*
* Results:
* A pointer to a freshly allocated Shell structure with a copy
* of the static structure or NULL if no shell with the given name
* is found.
*/
static struct Shell *
JobMatchShell(const char *name)
{
const struct CShell *sh; /* Pointer into shells table */
struct Shell *nsh;
for (sh = shells; sh < shells + sizeof(shells)/sizeof(shells[0]); sh++)
if (strcmp(sh->name, name) == 0)
break;
if (sh == shells + sizeof(shells)/sizeof(shells[0]))
return (NULL);
/* make a copy */
nsh = emalloc(sizeof(*nsh));
nsh->name = estrdup(sh->name);
nsh->echoOff = estrdup(sh->echoOff);
nsh->echoOn = estrdup(sh->echoOn);
nsh->hasEchoCtl = sh->hasEchoCtl;
nsh->noPrint = estrdup(sh->noPrint);
nsh->hasErrCtl = sh->hasErrCtl;
nsh->errCheck = estrdup(sh->errCheck);
nsh->ignErr = estrdup(sh->ignErr);
nsh->echo = estrdup(sh->echo);
nsh->exit = estrdup(sh->exit);
return (nsh);
}
/**
* Job_ParseShell
* Parse a shell specification and set up commandShell, shellPath
* and shellName appropriately.
*
* 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. Overrides "name" if given
* quiet Command to turn off echoing.
* echo Command to turn echoing on
* filter Result of turning off echoing that shouldn't be
* printed.
* echoFlag Flag to turn echoing on at the start
* errFlag Flag to turn error checking on at the start
* hasErrCtl True if shell has error checking control
* check Command to turn on error checking if hasErrCtl
* is TRUE or template of command to echo a command
* for which error checking is off if hasErrCtl is
* FALSE.
* ignore Command to turn off error checking if hasErrCtl
* is TRUE or template of command to execute a
* command so as to ignore any errors it returns if
* hasErrCtl is FALSE.
*/
ReturnStatus
Job_ParseShell(char *line)
{
char **words;
int wordCount;
char **argv;
int argc;
char *path;
char *eq;
Boolean fullSpec = FALSE;
struct Shell newShell;
struct Shell *sh;
while (isspace((unsigned char)*line)) {
line++;
}
words = brk_string(line, &wordCount, TRUE);
memset(&newShell, 0, sizeof(newShell));
path = NULL;
/*
* Parse the specification by keyword but skip the first word - it
* is not set by brk_string.
*/
wordCount--;
words++;
for (argc = wordCount, argv = words; argc != 0; argc--, argv++) {
/*
* Split keyword and value
*/
if ((eq = strchr(*argv, '=')) == NULL) {
Parse_Error(PARSE_FATAL, "missing '=' in shell "
"specification keyword '%s'", *argv);
return (FAILURE);
}
*eq++ = '\0';
if (strcmp(*argv, "path") == 0) {
path = eq;
} else if (strcmp(*argv, "name") == 0) {
newShell.name = eq;
} else if (strcmp(*argv, "quiet") == 0) {
newShell.echoOff = eq;
fullSpec = TRUE;
} else if (strcmp(*argv, "echo") == 0) {
newShell.echoOn = eq;
fullSpec = TRUE;
} else if (strcmp(*argv, "filter") == 0) {
newShell.noPrint = eq;
fullSpec = TRUE;
} else if (strcmp(*argv, "echoFlag") == 0) {
newShell.echo = eq;
fullSpec = TRUE;
} else if (strcmp(*argv, "errFlag") == 0) {
newShell.exit = eq;
fullSpec = TRUE;
} else if (strcmp(*argv, "hasErrCtl") == 0) {
newShell.hasErrCtl = (*eq == 'Y' || *eq == 'y' ||
*eq == 'T' || *eq == 't');
fullSpec = TRUE;
} else if (strcmp(*argv, "check") == 0) {
newShell.errCheck = eq;
fullSpec = TRUE;
} else if (strcmp(*argv, "ignore") == 0) {
newShell.ignErr = eq;
fullSpec = TRUE;
} else {
Parse_Error(PARSE_FATAL, "unknown keyword in shell "
"specification '%s'", *argv);
return (FAILURE);
}
}
/*
* Some checks (could be more)
*/
if (fullSpec) {
if ((newShell.echoOn != NULL) ^ (newShell.echoOff != NULL))
Parse_Error(PARSE_FATAL, "Shell must have either both "
"echoOff and echoOn or none of them");
if (newShell.echoOn != NULL && newShell.echoOff)
newShell.hasEchoCtl = TRUE;
}
if (path == NULL) {
/*
* If no path was given, the user wants one of the pre-defined
* shells, yes? So we find the one s/he wants with the help of
* JobMatchShell and set things up the right way. shellPath
* will be set up by Job_Init.
*/
if (newShell.name == NULL) {
Parse_Error(PARSE_FATAL,
"Neither path nor name specified");
return (FAILURE);
}
if ((sh = JobMatchShell(newShell.name)) == NULL) {
Parse_Error(PARSE_FATAL, "%s: no matching shell",
newShell.name);
return (FAILURE);
}
} 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.
*/
free(shellPath);
shellPath = estrdup(path);
if (newShell.name == NULL) {
/* get the base name as the name */
path = strrchr(path, '/');
if (path == NULL) {
path = shellPath;
} else {
path += 1;
}
newShell.name = path;
}
if (!fullSpec) {
if ((sh = JobMatchShell(newShell.name)) == NULL) {
Parse_Error(PARSE_FATAL,
"%s: no matching shell", newShell.name);
return (FAILURE);
}
} else {
sh = JobCopyShell(&newShell);
}
}
/* set the new shell */
JobFreeShell(commandShell);
commandShell = sh;
shellName = commandShell->name;
return (SUCCESS);
}
/**
* JobInterrupt
* Handle the receipt of an interrupt.
*
* 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 */
aborting = ABORT_INTERRUPT;
TAILQ_FOREACH(job, &jobs, link) {
if (!Targ_Precious(job->node)) {
char *file = (job->node->path == NULL ?
job->node->name : job->node->path);
if (!noExecute && eunlink(file) != -1) {
Error("*** %s removed", file);
}
}
if (job->pid) {
DEBUGF(JOB, ("JobInterrupt passing signal to child "
"%jd.\n", (intmax_t)job->pid));
KILL(job->pid, signo);
}
}
if (runINTERRUPT && !touchFlag) {
/*
* clear the interrupted flag because we would get an
* infinite loop otherwise.
*/
interrupted = 0;
interrupt = Targ_FindNode(".INTERRUPT", TARG_NOCREATE);
if (interrupt != NULL) {
ignoreErrors = FALSE;
JobStart(interrupt, JOB_IGNDOTS, (Job *)NULL);
while (nJobs) {
Job_CatchOutput(0);
Job_CatchChildren(!usePipes);
}
}
}
}
/**
* Job_Finish
* Do final processing such as the running of the commands
* attached to the .END target.
*
* Results:
* Number of errors reported.
*/
int
Job_Finish(void)
{
if (postCommands != NULL && !Lst_IsEmpty(&postCommands->commands)) {
if (errors) {
Error("Errors reported so .END ignored");
} else {
JobStart(postCommands, JOB_SPECIAL | JOB_IGNDOTS, NULL);
while (nJobs) {
Job_CatchOutput(0);
Job_CatchChildren(!usePipes);
}
}
}
if (fifoFd >= 0) {
close(fifoFd);
fifoFd = -1;
if (fifoMaster)
unlink(fifoName);
}
return (errors);
}
/**
* Job_Wait
* Waits for all running jobs to finish and returns. Sets 'aborting'
* to ABORT_WAIT to prevent other jobs from starting.
*
* Side Effects:
* Currently running jobs finish.
*/
void
Job_Wait(void)
{
aborting = ABORT_WAIT;
while (nJobs != 0) {
Job_CatchOutput(0);
Job_CatchChildren(!usePipes);
}
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.
*
* 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 (nJobs) {
TAILQ_FOREACH(job, &jobs, link) {
/*
* kill the child process with increasingly drastic
* signals to make darn sure it's dead.
*/
KILL(job->pid, SIGINT);
KILL(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)
;
}
/**
* JobRestartJobs
* Tries to restart stopped jobs if there are slots available.
* Note that this tries to restart them regardless of pending errors.
* It's not good to leave stopped jobs lying around!
*
* Side Effects:
* Resumes(and possibly migrates) jobs.
*/
static void
JobRestartJobs(void)
{
Job *job;
while (!jobFull && (job = TAILQ_FIRST(&stoppedJobs)) != NULL) {
DEBUGF(JOB, ("Job queue is not full. "
"Restarting a stopped job.\n"));
TAILQ_REMOVE(&stoppedJobs, job, link);
JobRestart(job);
}
}
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