/* Utilities to execute a program in a subprocess (possibly linked by pipes
|
/* Utilities to execute a program in a subprocess (possibly linked by pipes
|
with other subprocesses), and wait for it. Generic Unix version
|
with other subprocesses), and wait for it. Generic Unix version
|
(also used for UWIN and VMS).
|
(also used for UWIN and VMS).
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Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2003, 2004, 2005
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Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2003, 2004, 2005
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Free Software Foundation, Inc.
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Free Software Foundation, Inc.
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|
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This file is part of the libiberty library.
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This file is part of the libiberty library.
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Libiberty is free software; you can redistribute it and/or
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Libiberty is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
|
modify it under the terms of the GNU Library General Public
|
License as published by the Free Software Foundation; either
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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version 2 of the License, or (at your option) any later version.
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|
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Libiberty is distributed in the hope that it will be useful,
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Libiberty is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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but WITHOUT ANY WARRANTY; without even the implied warranty of
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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Library General Public License for more details.
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|
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You should have received a copy of the GNU Library General Public
|
You should have received a copy of the GNU Library General Public
|
License along with libiberty; see the file COPYING.LIB. If not,
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License along with libiberty; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
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write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
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Boston, MA 02110-1301, USA. */
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Boston, MA 02110-1301, USA. */
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|
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#include "config.h"
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#include "config.h"
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#include "libiberty.h"
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#include "libiberty.h"
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#include "pex-common.h"
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#include "pex-common.h"
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|
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#include <stdio.h>
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#include <stdio.h>
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#include <signal.h>
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#include <signal.h>
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#include <errno.h>
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#include <errno.h>
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#ifdef NEED_DECLARATION_ERRNO
|
#ifdef NEED_DECLARATION_ERRNO
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extern int errno;
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extern int errno;
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#endif
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#endif
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#ifdef HAVE_STDLIB_H
|
#ifdef HAVE_STDLIB_H
|
#include <stdlib.h>
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#include <stdlib.h>
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#endif
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#endif
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#ifdef HAVE_STRING_H
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#ifdef HAVE_STRING_H
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#include <string.h>
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#include <string.h>
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#endif
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#endif
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#ifdef HAVE_UNISTD_H
|
#ifdef HAVE_UNISTD_H
|
#include <unistd.h>
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#include <unistd.h>
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#endif
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#endif
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|
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#include <sys/types.h>
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#include <sys/types.h>
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|
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#ifdef HAVE_FCNTL_H
|
#ifdef HAVE_FCNTL_H
|
#include <fcntl.h>
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#include <fcntl.h>
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#endif
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#endif
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#ifdef HAVE_SYS_WAIT_H
|
#ifdef HAVE_SYS_WAIT_H
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#include <sys/wait.h>
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#include <sys/wait.h>
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#endif
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#endif
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#ifdef HAVE_GETRUSAGE
|
#ifdef HAVE_GETRUSAGE
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#include <sys/time.h>
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#include <sys/time.h>
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#include <sys/resource.h>
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#include <sys/resource.h>
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#endif
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#endif
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#ifdef HAVE_SYS_STAT_H
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#ifdef HAVE_SYS_STAT_H
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#include <sys/stat.h>
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#include <sys/stat.h>
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#endif
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#endif
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|
|
|
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#ifdef vfork /* Autoconf may define this to fork for us. */
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#ifdef vfork /* Autoconf may define this to fork for us. */
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# define VFORK_STRING "fork"
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# define VFORK_STRING "fork"
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#else
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#else
|
# define VFORK_STRING "vfork"
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# define VFORK_STRING "vfork"
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#endif
|
#endif
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#ifdef HAVE_VFORK_H
|
#ifdef HAVE_VFORK_H
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#include <vfork.h>
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#include <vfork.h>
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#endif
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#endif
|
#ifdef VMS
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#ifdef VMS
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#define vfork() (decc$$alloc_vfork_blocks() >= 0 ? \
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#define vfork() (decc$$alloc_vfork_blocks() >= 0 ? \
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lib$get_current_invo_context(decc$$get_vfork_jmpbuf()) : -1)
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lib$get_current_invo_context(decc$$get_vfork_jmpbuf()) : -1)
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#endif /* VMS */
|
#endif /* VMS */
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|
|
|
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/* File mode to use for private and world-readable files. */
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/* File mode to use for private and world-readable files. */
|
|
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#if defined (S_IRUSR) && defined (S_IWUSR) && defined (S_IRGRP) && defined (S_IWGRP) && defined (S_IROTH) && defined (S_IWOTH)
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#if defined (S_IRUSR) && defined (S_IWUSR) && defined (S_IRGRP) && defined (S_IWGRP) && defined (S_IROTH) && defined (S_IWOTH)
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#define PUBLIC_MODE \
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#define PUBLIC_MODE \
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(S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH)
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(S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH)
|
#else
|
#else
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#define PUBLIC_MODE 0666
|
#define PUBLIC_MODE 0666
|
#endif
|
#endif
|
|
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/* Get the exit status of a particular process, and optionally get the
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/* Get the exit status of a particular process, and optionally get the
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time that it took. This is simple if we have wait4, slightly
|
time that it took. This is simple if we have wait4, slightly
|
harder if we have waitpid, and is a pain if we only have wait. */
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harder if we have waitpid, and is a pain if we only have wait. */
|
|
|
static pid_t pex_wait (struct pex_obj *, pid_t, int *, struct pex_time *);
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static pid_t pex_wait (struct pex_obj *, pid_t, int *, struct pex_time *);
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|
|
#ifdef HAVE_WAIT4
|
#ifdef HAVE_WAIT4
|
|
|
static pid_t
|
static pid_t
|
pex_wait (struct pex_obj *obj ATTRIBUTE_UNUSED, pid_t pid, int *status,
|
pex_wait (struct pex_obj *obj ATTRIBUTE_UNUSED, pid_t pid, int *status,
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struct pex_time *time)
|
struct pex_time *time)
|
{
|
{
|
pid_t ret;
|
pid_t ret;
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struct rusage r;
|
struct rusage r;
|
|
|
#ifdef HAVE_WAITPID
|
#ifdef HAVE_WAITPID
|
if (time == NULL)
|
if (time == NULL)
|
return waitpid (pid, status, 0);
|
return waitpid (pid, status, 0);
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#endif
|
#endif
|
|
|
ret = wait4 (pid, status, 0, &r);
|
ret = wait4 (pid, status, 0, &r);
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|
|
if (time != NULL)
|
if (time != NULL)
|
{
|
{
|
time->user_seconds = r.ru_utime.tv_sec;
|
time->user_seconds = r.ru_utime.tv_sec;
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time->user_microseconds= r.ru_utime.tv_usec;
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time->user_microseconds= r.ru_utime.tv_usec;
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time->system_seconds = r.ru_stime.tv_sec;
|
time->system_seconds = r.ru_stime.tv_sec;
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time->system_microseconds= r.ru_stime.tv_usec;
|
time->system_microseconds= r.ru_stime.tv_usec;
|
}
|
}
|
|
|
return ret;
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return ret;
|
}
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}
|
|
|
#else /* ! defined (HAVE_WAIT4) */
|
#else /* ! defined (HAVE_WAIT4) */
|
|
|
#ifdef HAVE_WAITPID
|
#ifdef HAVE_WAITPID
|
|
|
#ifndef HAVE_GETRUSAGE
|
#ifndef HAVE_GETRUSAGE
|
|
|
static pid_t
|
static pid_t
|
pex_wait (struct pex_obj *obj ATTRIBUTE_UNUSED, pid_t pid, int *status,
|
pex_wait (struct pex_obj *obj ATTRIBUTE_UNUSED, pid_t pid, int *status,
|
struct pex_time *time)
|
struct pex_time *time)
|
{
|
{
|
if (time != NULL)
|
if (time != NULL)
|
memset (time, 0, sizeof (struct pex_time));
|
memset (time, 0, sizeof (struct pex_time));
|
return waitpid (pid, status, 0);
|
return waitpid (pid, status, 0);
|
}
|
}
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|
|
#else /* defined (HAVE_GETRUSAGE) */
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#else /* defined (HAVE_GETRUSAGE) */
|
|
|
static pid_t
|
static pid_t
|
pex_wait (struct pex_obj *obj ATTRIBUTE_UNUSED, pid_t pid, int *status,
|
pex_wait (struct pex_obj *obj ATTRIBUTE_UNUSED, pid_t pid, int *status,
|
struct pex_time *time)
|
struct pex_time *time)
|
{
|
{
|
struct rusage r1, r2;
|
struct rusage r1, r2;
|
pid_t ret;
|
pid_t ret;
|
|
|
if (time == NULL)
|
if (time == NULL)
|
return waitpid (pid, status, 0);
|
return waitpid (pid, status, 0);
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|
|
getrusage (RUSAGE_CHILDREN, &r1);
|
getrusage (RUSAGE_CHILDREN, &r1);
|
|
|
ret = waitpid (pid, status, 0);
|
ret = waitpid (pid, status, 0);
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if (ret < 0)
|
if (ret < 0)
|
return ret;
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return ret;
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|
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getrusage (RUSAGE_CHILDREN, &r2);
|
getrusage (RUSAGE_CHILDREN, &r2);
|
|
|
time->user_seconds = r2.ru_utime.tv_sec - r1.ru_utime.tv_sec;
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time->user_seconds = r2.ru_utime.tv_sec - r1.ru_utime.tv_sec;
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time->user_microseconds = r2.ru_utime.tv_usec - r1.ru_utime.tv_usec;
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time->user_microseconds = r2.ru_utime.tv_usec - r1.ru_utime.tv_usec;
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if (r2.ru_utime.tv_usec < r1.ru_utime.tv_usec)
|
if (r2.ru_utime.tv_usec < r1.ru_utime.tv_usec)
|
{
|
{
|
--time->user_seconds;
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--time->user_seconds;
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time->user_microseconds += 1000000;
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time->user_microseconds += 1000000;
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}
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}
|
|
|
time->system_seconds = r2.ru_stime.tv_sec - r1.ru_stime.tv_sec;
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time->system_seconds = r2.ru_stime.tv_sec - r1.ru_stime.tv_sec;
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time->system_microseconds = r2.ru_stime.tv_usec - r1.ru_stime.tv_usec;
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time->system_microseconds = r2.ru_stime.tv_usec - r1.ru_stime.tv_usec;
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if (r2.ru_stime.tv_usec < r1.ru_stime.tv_usec)
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if (r2.ru_stime.tv_usec < r1.ru_stime.tv_usec)
|
{
|
{
|
--time->system_seconds;
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--time->system_seconds;
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time->system_microseconds += 1000000;
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time->system_microseconds += 1000000;
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}
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}
|
|
|
return ret;
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return ret;
|
}
|
}
|
|
|
#endif /* defined (HAVE_GETRUSAGE) */
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#endif /* defined (HAVE_GETRUSAGE) */
|
|
|
#else /* ! defined (HAVE_WAITPID) */
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#else /* ! defined (HAVE_WAITPID) */
|
|
|
struct status_list
|
struct status_list
|
{
|
{
|
struct status_list *next;
|
struct status_list *next;
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pid_t pid;
|
pid_t pid;
|
int status;
|
int status;
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struct pex_time time;
|
struct pex_time time;
|
};
|
};
|
|
|
static pid_t
|
static pid_t
|
pex_wait (struct pex_obj *obj, pid_t pid, int *status, struct pex_time *time)
|
pex_wait (struct pex_obj *obj, pid_t pid, int *status, struct pex_time *time)
|
{
|
{
|
struct status_list **pp;
|
struct status_list **pp;
|
|
|
for (pp = (struct status_list **) &obj->sysdep;
|
for (pp = (struct status_list **) &obj->sysdep;
|
*pp != NULL;
|
*pp != NULL;
|
pp = &(*pp)->next)
|
pp = &(*pp)->next)
|
{
|
{
|
if ((*pp)->pid == pid)
|
if ((*pp)->pid == pid)
|
{
|
{
|
struct status_list *p;
|
struct status_list *p;
|
|
|
p = *pp;
|
p = *pp;
|
*status = p->status;
|
*status = p->status;
|
if (time != NULL)
|
if (time != NULL)
|
*time = p->time;
|
*time = p->time;
|
*pp = p->next;
|
*pp = p->next;
|
free (p);
|
free (p);
|
return pid;
|
return pid;
|
}
|
}
|
}
|
}
|
|
|
while (1)
|
while (1)
|
{
|
{
|
pid_t cpid;
|
pid_t cpid;
|
struct status_list *psl;
|
struct status_list *psl;
|
struct pex_time pt;
|
struct pex_time pt;
|
#ifdef HAVE_GETRUSAGE
|
#ifdef HAVE_GETRUSAGE
|
struct rusage r1, r2;
|
struct rusage r1, r2;
|
#endif
|
#endif
|
|
|
if (time != NULL)
|
if (time != NULL)
|
{
|
{
|
#ifdef HAVE_GETRUSAGE
|
#ifdef HAVE_GETRUSAGE
|
getrusage (RUSAGE_CHILDREN, &r1);
|
getrusage (RUSAGE_CHILDREN, &r1);
|
#else
|
#else
|
memset (&pt, 0, sizeof (struct pex_time));
|
memset (&pt, 0, sizeof (struct pex_time));
|
#endif
|
#endif
|
}
|
}
|
|
|
cpid = wait (status);
|
cpid = wait (status);
|
|
|
#ifdef HAVE_GETRUSAGE
|
#ifdef HAVE_GETRUSAGE
|
if (time != NULL && cpid >= 0)
|
if (time != NULL && cpid >= 0)
|
{
|
{
|
getrusage (RUSAGE_CHILDREN, &r2);
|
getrusage (RUSAGE_CHILDREN, &r2);
|
|
|
pt.user_seconds = r2.ru_utime.tv_sec - r1.ru_utime.tv_sec;
|
pt.user_seconds = r2.ru_utime.tv_sec - r1.ru_utime.tv_sec;
|
pt.user_microseconds = r2.ru_utime.tv_usec - r1.ru_utime.tv_usec;
|
pt.user_microseconds = r2.ru_utime.tv_usec - r1.ru_utime.tv_usec;
|
if (pt.user_microseconds < 0)
|
if (pt.user_microseconds < 0)
|
{
|
{
|
--pt.user_seconds;
|
--pt.user_seconds;
|
pt.user_microseconds += 1000000;
|
pt.user_microseconds += 1000000;
|
}
|
}
|
|
|
pt.system_seconds = r2.ru_stime.tv_sec - r1.ru_stime.tv_sec;
|
pt.system_seconds = r2.ru_stime.tv_sec - r1.ru_stime.tv_sec;
|
pt.system_microseconds = r2.ru_stime.tv_usec - r1.ru_stime.tv_usec;
|
pt.system_microseconds = r2.ru_stime.tv_usec - r1.ru_stime.tv_usec;
|
if (pt.system_microseconds < 0)
|
if (pt.system_microseconds < 0)
|
{
|
{
|
--pt.system_seconds;
|
--pt.system_seconds;
|
pt.system_microseconds += 1000000;
|
pt.system_microseconds += 1000000;
|
}
|
}
|
}
|
}
|
#endif
|
#endif
|
|
|
if (cpid < 0 || cpid == pid)
|
if (cpid < 0 || cpid == pid)
|
{
|
{
|
if (time != NULL)
|
if (time != NULL)
|
*time = pt;
|
*time = pt;
|
return cpid;
|
return cpid;
|
}
|
}
|
|
|
psl = XNEW (struct status_list);
|
psl = XNEW (struct status_list);
|
psl->pid = cpid;
|
psl->pid = cpid;
|
psl->status = *status;
|
psl->status = *status;
|
if (time != NULL)
|
if (time != NULL)
|
psl->time = pt;
|
psl->time = pt;
|
psl->next = (struct status_list *) obj->sysdep;
|
psl->next = (struct status_list *) obj->sysdep;
|
obj->sysdep = (void *) psl;
|
obj->sysdep = (void *) psl;
|
}
|
}
|
}
|
}
|
|
|
#endif /* ! defined (HAVE_WAITPID) */
|
#endif /* ! defined (HAVE_WAITPID) */
|
#endif /* ! defined (HAVE_WAIT4) */
|
#endif /* ! defined (HAVE_WAIT4) */
|
|
|
static void pex_child_error (struct pex_obj *, const char *, const char *, int)
|
static void pex_child_error (struct pex_obj *, const char *, const char *, int)
|
ATTRIBUTE_NORETURN;
|
ATTRIBUTE_NORETURN;
|
static int pex_unix_open_read (struct pex_obj *, const char *, int);
|
static int pex_unix_open_read (struct pex_obj *, const char *, int);
|
static int pex_unix_open_write (struct pex_obj *, const char *, int);
|
static int pex_unix_open_write (struct pex_obj *, const char *, int);
|
static long pex_unix_exec_child (struct pex_obj *, int, const char *,
|
static long pex_unix_exec_child (struct pex_obj *, int, const char *,
|
char * const *, char * const *,
|
char * const *, char * const *,
|
int, int, int, int,
|
int, int, int, int,
|
const char **, int *);
|
const char **, int *);
|
static int pex_unix_close (struct pex_obj *, int);
|
static int pex_unix_close (struct pex_obj *, int);
|
static int pex_unix_wait (struct pex_obj *, long, int *, struct pex_time *,
|
static int pex_unix_wait (struct pex_obj *, long, int *, struct pex_time *,
|
int, const char **, int *);
|
int, const char **, int *);
|
static int pex_unix_pipe (struct pex_obj *, int *, int);
|
static int pex_unix_pipe (struct pex_obj *, int *, int);
|
static FILE *pex_unix_fdopenr (struct pex_obj *, int, int);
|
static FILE *pex_unix_fdopenr (struct pex_obj *, int, int);
|
static FILE *pex_unix_fdopenw (struct pex_obj *, int, int);
|
static FILE *pex_unix_fdopenw (struct pex_obj *, int, int);
|
static void pex_unix_cleanup (struct pex_obj *);
|
static void pex_unix_cleanup (struct pex_obj *);
|
|
|
/* The list of functions we pass to the common routines. */
|
/* The list of functions we pass to the common routines. */
|
|
|
const struct pex_funcs funcs =
|
const struct pex_funcs funcs =
|
{
|
{
|
pex_unix_open_read,
|
pex_unix_open_read,
|
pex_unix_open_write,
|
pex_unix_open_write,
|
pex_unix_exec_child,
|
pex_unix_exec_child,
|
pex_unix_close,
|
pex_unix_close,
|
pex_unix_wait,
|
pex_unix_wait,
|
pex_unix_pipe,
|
pex_unix_pipe,
|
pex_unix_fdopenr,
|
pex_unix_fdopenr,
|
pex_unix_fdopenw,
|
pex_unix_fdopenw,
|
pex_unix_cleanup
|
pex_unix_cleanup
|
};
|
};
|
|
|
/* Return a newly initialized pex_obj structure. */
|
/* Return a newly initialized pex_obj structure. */
|
|
|
struct pex_obj *
|
struct pex_obj *
|
pex_init (int flags, const char *pname, const char *tempbase)
|
pex_init (int flags, const char *pname, const char *tempbase)
|
{
|
{
|
return pex_init_common (flags, pname, tempbase, &funcs);
|
return pex_init_common (flags, pname, tempbase, &funcs);
|
}
|
}
|
|
|
/* Open a file for reading. */
|
/* Open a file for reading. */
|
|
|
static int
|
static int
|
pex_unix_open_read (struct pex_obj *obj ATTRIBUTE_UNUSED, const char *name,
|
pex_unix_open_read (struct pex_obj *obj ATTRIBUTE_UNUSED, const char *name,
|
int binary ATTRIBUTE_UNUSED)
|
int binary ATTRIBUTE_UNUSED)
|
{
|
{
|
return open (name, O_RDONLY);
|
return open (name, O_RDONLY);
|
}
|
}
|
|
|
/* Open a file for writing. */
|
/* Open a file for writing. */
|
|
|
static int
|
static int
|
pex_unix_open_write (struct pex_obj *obj ATTRIBUTE_UNUSED, const char *name,
|
pex_unix_open_write (struct pex_obj *obj ATTRIBUTE_UNUSED, const char *name,
|
int binary ATTRIBUTE_UNUSED)
|
int binary ATTRIBUTE_UNUSED)
|
{
|
{
|
/* Note that we can't use O_EXCL here because gcc may have already
|
/* Note that we can't use O_EXCL here because gcc may have already
|
created the temporary file via make_temp_file. */
|
created the temporary file via make_temp_file. */
|
return open (name, O_WRONLY | O_CREAT | O_TRUNC, PUBLIC_MODE);
|
return open (name, O_WRONLY | O_CREAT | O_TRUNC, PUBLIC_MODE);
|
}
|
}
|
|
|
/* Close a file. */
|
/* Close a file. */
|
|
|
static int
|
static int
|
pex_unix_close (struct pex_obj *obj ATTRIBUTE_UNUSED, int fd)
|
pex_unix_close (struct pex_obj *obj ATTRIBUTE_UNUSED, int fd)
|
{
|
{
|
return close (fd);
|
return close (fd);
|
}
|
}
|
|
|
/* Report an error from a child process. We don't use stdio routines,
|
/* Report an error from a child process. We don't use stdio routines,
|
because we might be here due to a vfork call. */
|
because we might be here due to a vfork call. */
|
|
|
static void
|
static void
|
pex_child_error (struct pex_obj *obj, const char *executable,
|
pex_child_error (struct pex_obj *obj, const char *executable,
|
const char *errmsg, int err)
|
const char *errmsg, int err)
|
{
|
{
|
#define writeerr(s) write (STDERR_FILE_NO, s, strlen (s))
|
#define writeerr(s) write (STDERR_FILE_NO, s, strlen (s))
|
writeerr (obj->pname);
|
writeerr (obj->pname);
|
writeerr (": error trying to exec '");
|
writeerr (": error trying to exec '");
|
writeerr (executable);
|
writeerr (executable);
|
writeerr ("': ");
|
writeerr ("': ");
|
writeerr (errmsg);
|
writeerr (errmsg);
|
writeerr (": ");
|
writeerr (": ");
|
writeerr (xstrerror (err));
|
writeerr (xstrerror (err));
|
writeerr ("\n");
|
writeerr ("\n");
|
_exit (-1);
|
_exit (-1);
|
}
|
}
|
|
|
/* Execute a child. */
|
/* Execute a child. */
|
|
|
extern char **environ;
|
extern char **environ;
|
|
|
static long
|
static long
|
pex_unix_exec_child (struct pex_obj *obj, int flags, const char *executable,
|
pex_unix_exec_child (struct pex_obj *obj, int flags, const char *executable,
|
char * const * argv, char * const * env,
|
char * const * argv, char * const * env,
|
int in, int out, int errdes,
|
int in, int out, int errdes,
|
int toclose, const char **errmsg, int *err)
|
int toclose, const char **errmsg, int *err)
|
{
|
{
|
pid_t pid;
|
pid_t pid;
|
|
|
/* We declare these to be volatile to avoid warnings from gcc about
|
/* We declare these to be volatile to avoid warnings from gcc about
|
them being clobbered by vfork. */
|
them being clobbered by vfork. */
|
volatile int sleep_interval;
|
volatile int sleep_interval;
|
volatile int retries;
|
volatile int retries;
|
|
|
sleep_interval = 1;
|
sleep_interval = 1;
|
pid = -1;
|
pid = -1;
|
for (retries = 0; retries < 4; ++retries)
|
for (retries = 0; retries < 4; ++retries)
|
{
|
{
|
pid = vfork ();
|
pid = vfork ();
|
if (pid >= 0)
|
if (pid >= 0)
|
break;
|
break;
|
sleep (sleep_interval);
|
sleep (sleep_interval);
|
sleep_interval *= 2;
|
sleep_interval *= 2;
|
}
|
}
|
|
|
switch (pid)
|
switch (pid)
|
{
|
{
|
case -1:
|
case -1:
|
*err = errno;
|
*err = errno;
|
*errmsg = VFORK_STRING;
|
*errmsg = VFORK_STRING;
|
return -1;
|
return -1;
|
|
|
case 0:
|
case 0:
|
/* Child process. */
|
/* Child process. */
|
if (in != STDIN_FILE_NO)
|
if (in != STDIN_FILE_NO)
|
{
|
{
|
if (dup2 (in, STDIN_FILE_NO) < 0)
|
if (dup2 (in, STDIN_FILE_NO) < 0)
|
pex_child_error (obj, executable, "dup2", errno);
|
pex_child_error (obj, executable, "dup2", errno);
|
if (close (in) < 0)
|
if (close (in) < 0)
|
pex_child_error (obj, executable, "close", errno);
|
pex_child_error (obj, executable, "close", errno);
|
}
|
}
|
if (out != STDOUT_FILE_NO)
|
if (out != STDOUT_FILE_NO)
|
{
|
{
|
if (dup2 (out, STDOUT_FILE_NO) < 0)
|
if (dup2 (out, STDOUT_FILE_NO) < 0)
|
pex_child_error (obj, executable, "dup2", errno);
|
pex_child_error (obj, executable, "dup2", errno);
|
if (close (out) < 0)
|
if (close (out) < 0)
|
pex_child_error (obj, executable, "close", errno);
|
pex_child_error (obj, executable, "close", errno);
|
}
|
}
|
if (errdes != STDERR_FILE_NO)
|
if (errdes != STDERR_FILE_NO)
|
{
|
{
|
if (dup2 (errdes, STDERR_FILE_NO) < 0)
|
if (dup2 (errdes, STDERR_FILE_NO) < 0)
|
pex_child_error (obj, executable, "dup2", errno);
|
pex_child_error (obj, executable, "dup2", errno);
|
if (close (errdes) < 0)
|
if (close (errdes) < 0)
|
pex_child_error (obj, executable, "close", errno);
|
pex_child_error (obj, executable, "close", errno);
|
}
|
}
|
if (toclose >= 0)
|
if (toclose >= 0)
|
{
|
{
|
if (close (toclose) < 0)
|
if (close (toclose) < 0)
|
pex_child_error (obj, executable, "close", errno);
|
pex_child_error (obj, executable, "close", errno);
|
}
|
}
|
if ((flags & PEX_STDERR_TO_STDOUT) != 0)
|
if ((flags & PEX_STDERR_TO_STDOUT) != 0)
|
{
|
{
|
if (dup2 (STDOUT_FILE_NO, STDERR_FILE_NO) < 0)
|
if (dup2 (STDOUT_FILE_NO, STDERR_FILE_NO) < 0)
|
pex_child_error (obj, executable, "dup2", errno);
|
pex_child_error (obj, executable, "dup2", errno);
|
}
|
}
|
|
|
if (env)
|
if (env)
|
environ = (char**) env;
|
environ = (char**) env;
|
|
|
if ((flags & PEX_SEARCH) != 0)
|
if ((flags & PEX_SEARCH) != 0)
|
{
|
{
|
execvp (executable, argv);
|
execvp (executable, argv);
|
pex_child_error (obj, executable, "execvp", errno);
|
pex_child_error (obj, executable, "execvp", errno);
|
}
|
}
|
else
|
else
|
{
|
{
|
execv (executable, argv);
|
execv (executable, argv);
|
pex_child_error (obj, executable, "execv", errno);
|
pex_child_error (obj, executable, "execv", errno);
|
}
|
}
|
|
|
/* NOTREACHED */
|
/* NOTREACHED */
|
return -1;
|
return -1;
|
|
|
default:
|
default:
|
/* Parent process. */
|
/* Parent process. */
|
if (in != STDIN_FILE_NO)
|
if (in != STDIN_FILE_NO)
|
{
|
{
|
if (close (in) < 0)
|
if (close (in) < 0)
|
{
|
{
|
*err = errno;
|
*err = errno;
|
*errmsg = "close";
|
*errmsg = "close";
|
return -1;
|
return -1;
|
}
|
}
|
}
|
}
|
if (out != STDOUT_FILE_NO)
|
if (out != STDOUT_FILE_NO)
|
{
|
{
|
if (close (out) < 0)
|
if (close (out) < 0)
|
{
|
{
|
*err = errno;
|
*err = errno;
|
*errmsg = "close";
|
*errmsg = "close";
|
return -1;
|
return -1;
|
}
|
}
|
}
|
}
|
if (errdes != STDERR_FILE_NO)
|
if (errdes != STDERR_FILE_NO)
|
{
|
{
|
if (close (errdes) < 0)
|
if (close (errdes) < 0)
|
{
|
{
|
*err = errno;
|
*err = errno;
|
*errmsg = "close";
|
*errmsg = "close";
|
return -1;
|
return -1;
|
}
|
}
|
}
|
}
|
|
|
return (long) pid;
|
return (long) pid;
|
}
|
}
|
}
|
}
|
|
|
/* Wait for a child process to complete. */
|
/* Wait for a child process to complete. */
|
|
|
static int
|
static int
|
pex_unix_wait (struct pex_obj *obj, long pid, int *status,
|
pex_unix_wait (struct pex_obj *obj, long pid, int *status,
|
struct pex_time *time, int done, const char **errmsg,
|
struct pex_time *time, int done, const char **errmsg,
|
int *err)
|
int *err)
|
{
|
{
|
/* If we are cleaning up when the caller didn't retrieve process
|
/* If we are cleaning up when the caller didn't retrieve process
|
status for some reason, encourage the process to go away. */
|
status for some reason, encourage the process to go away. */
|
if (done)
|
if (done)
|
kill (pid, SIGTERM);
|
kill (pid, SIGTERM);
|
|
|
if (pex_wait (obj, pid, status, time) < 0)
|
if (pex_wait (obj, pid, status, time) < 0)
|
{
|
{
|
*err = errno;
|
*err = errno;
|
*errmsg = "wait";
|
*errmsg = "wait";
|
return -1;
|
return -1;
|
}
|
}
|
|
|
return 0;
|
return 0;
|
}
|
}
|
|
|
/* Create a pipe. */
|
/* Create a pipe. */
|
|
|
static int
|
static int
|
pex_unix_pipe (struct pex_obj *obj ATTRIBUTE_UNUSED, int *p,
|
pex_unix_pipe (struct pex_obj *obj ATTRIBUTE_UNUSED, int *p,
|
int binary ATTRIBUTE_UNUSED)
|
int binary ATTRIBUTE_UNUSED)
|
{
|
{
|
return pipe (p);
|
return pipe (p);
|
}
|
}
|
|
|
/* Get a FILE pointer to read from a file descriptor. */
|
/* Get a FILE pointer to read from a file descriptor. */
|
|
|
static FILE *
|
static FILE *
|
pex_unix_fdopenr (struct pex_obj *obj ATTRIBUTE_UNUSED, int fd,
|
pex_unix_fdopenr (struct pex_obj *obj ATTRIBUTE_UNUSED, int fd,
|
int binary ATTRIBUTE_UNUSED)
|
int binary ATTRIBUTE_UNUSED)
|
{
|
{
|
return fdopen (fd, "r");
|
return fdopen (fd, "r");
|
}
|
}
|
|
|
static FILE *
|
static FILE *
|
pex_unix_fdopenw (struct pex_obj *obj ATTRIBUTE_UNUSED, int fd,
|
pex_unix_fdopenw (struct pex_obj *obj ATTRIBUTE_UNUSED, int fd,
|
int binary ATTRIBUTE_UNUSED)
|
int binary ATTRIBUTE_UNUSED)
|
{
|
{
|
if (fcntl (fd, F_SETFD, FD_CLOEXEC) < 0)
|
if (fcntl (fd, F_SETFD, FD_CLOEXEC) < 0)
|
return NULL;
|
return NULL;
|
return fdopen (fd, "w");
|
return fdopen (fd, "w");
|
}
|
}
|
|
|
static void
|
static void
|
pex_unix_cleanup (struct pex_obj *obj ATTRIBUTE_UNUSED)
|
pex_unix_cleanup (struct pex_obj *obj ATTRIBUTE_UNUSED)
|
{
|
{
|
#if !defined (HAVE_WAIT4) && !defined (HAVE_WAITPID)
|
#if !defined (HAVE_WAIT4) && !defined (HAVE_WAITPID)
|
while (obj->sysdep != NULL)
|
while (obj->sysdep != NULL)
|
{
|
{
|
struct status_list *this;
|
struct status_list *this;
|
struct status_list *next;
|
struct status_list *next;
|
|
|
this = (struct status_list *) obj->sysdep;
|
this = (struct status_list *) obj->sysdep;
|
next = this->next;
|
next = this->next;
|
free (this);
|
free (this);
|
obj->sysdep = (void *) next;
|
obj->sysdep = (void *) next;
|
}
|
}
|
#endif
|
#endif
|
}
|
}
|
|
|
