mirror of
https://sourceware.org/git/binutils-gdb.git
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b55f967878
include/ChangeLog * libiberty.h (PEX_STDOUT_APPEND): New flag. (PEX_STDERR_APPEND): Likewise. * demangle.h (DMGL_DLANG): New macro. (DMGL_STYLE_MASK): Add DMGL_DLANG. (demangling_styles): Add dlang_demangling. (DLANG_DEMANGLING_STYLE_STRING): New macro. (DLANG_DEMANGLING): New macro. (dlang_demangle): New prototype. * longlong.h: Add __udiv_w_sdiv prototype. libiberty/ChangeLog * cp-demangle.c (d_substitution): Handle abi tags on abbreviation. * pex-common.h (struct pex_funcs): Add new parameter for open_write field. * pex-unix.c (pex_unix_open_write): Add support for new parameter. * pex-djgpp.c (pex_djgpp_open_write): Likewise. * pex-win32.c (pex_win32_open_write): Likewise. * pex-common.c (pex_run_in_environment): Likewise. * Makefile.in (CFILES): Add d-demangle.c. (REQUIRED_OFILES): Add d-demangle.o. * cplus-dem.c (libiberty_demanglers): Add dlang_demangling case. (cplus_demangle): Likewise. * d-demangle.c: New file. * testsuite/Makefile.in (really-check): Add check-d-demangle. * testsuite/d-demangle-expected: New file. * simple-object-elf.c (simple_object_elf_write_ehdr): Correctly handle objects with more than SHN_LORESERVE sections. (simple_object_elf_write_shdr): Add sh_link parameter. (simple_object_elf_write_to_file): Correctly handle objects with more than SHN_LORESERVE sections. * cp-demangle.c (d_dump): Only access field from s_fixed part of the union for DEMANGLE_COMPONENT_FIXED_TYPE. (d_count_templates_scopes): Likewise. * testsuite/demangler-fuzzer.c: New file. * testsuite/Makefile.in (fuzz-demangler): New rule. (demangler-fuzzer): Likewise. (mostlyclean): Clean up demangler fuzzer.
792 lines
20 KiB
C
792 lines
20 KiB
C
/* Utilities to execute a program in a subprocess (possibly linked by pipes
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with other subprocesses), and wait for it. Generic Unix version
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(also used for UWIN and VMS).
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Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2003, 2004, 2005, 2009,
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2010 Free Software Foundation, Inc.
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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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modify it under the terms of the GNU Library General Public
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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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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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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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You should have received a copy of the GNU Library General Public
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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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Boston, MA 02110-1301, USA. */
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#include "config.h"
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#include "libiberty.h"
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#include "pex-common.h"
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#include <stdio.h>
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#include <signal.h>
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#include <errno.h>
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#ifdef NEED_DECLARATION_ERRNO
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extern int errno;
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#endif
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#ifdef HAVE_STDLIB_H
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#include <stdlib.h>
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#endif
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#ifdef HAVE_STRING_H
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#include <string.h>
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#endif
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#include <sys/types.h>
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#ifdef HAVE_FCNTL_H
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#include <fcntl.h>
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#endif
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#ifdef HAVE_SYS_WAIT_H
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#include <sys/wait.h>
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#endif
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#ifdef HAVE_GETRUSAGE
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#include <sys/time.h>
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#include <sys/resource.h>
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#endif
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#ifdef HAVE_SYS_STAT_H
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#include <sys/stat.h>
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#endif
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#ifdef HAVE_PROCESS_H
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#include <process.h>
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#endif
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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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#else
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# define VFORK_STRING "vfork"
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#endif
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#ifdef HAVE_VFORK_H
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#include <vfork.h>
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#endif
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#if defined(VMS) && defined (__LONG_POINTERS)
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#ifndef __CHAR_PTR32
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typedef char * __char_ptr32
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__attribute__ ((mode (SI)));
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#endif
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typedef __char_ptr32 *__char_ptr_char_ptr32
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__attribute__ ((mode (SI)));
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/* Return a 32 bit pointer to an array of 32 bit pointers
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given a 64 bit pointer to an array of 64 bit pointers. */
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static __char_ptr_char_ptr32
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to_ptr32 (char **ptr64)
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{
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int argc;
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__char_ptr_char_ptr32 short_argv;
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/* Count number of arguments. */
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for (argc = 0; ptr64[argc] != NULL; argc++)
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;
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/* Reallocate argv with 32 bit pointers. */
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short_argv = (__char_ptr_char_ptr32) decc$malloc
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(sizeof (__char_ptr32) * (argc + 1));
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for (argc = 0; ptr64[argc] != NULL; argc++)
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short_argv[argc] = (__char_ptr32) decc$strdup (ptr64[argc]);
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short_argv[argc] = (__char_ptr32) 0;
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return short_argv;
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}
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#else
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#define to_ptr32(argv) argv
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#endif
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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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#define PUBLIC_MODE \
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(S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH)
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#else
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#define PUBLIC_MODE 0666
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#endif
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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
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harder if we have waitpid, and is a pain if we only have wait. */
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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
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static pid_t
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pex_wait (struct pex_obj *obj ATTRIBUTE_UNUSED, pid_t pid, int *status,
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struct pex_time *time)
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{
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pid_t ret;
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struct rusage r;
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#ifdef HAVE_WAITPID
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if (time == NULL)
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return waitpid (pid, status, 0);
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#endif
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ret = wait4 (pid, status, 0, &r);
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if (time != NULL)
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{
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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->system_seconds = r.ru_stime.tv_sec;
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time->system_microseconds= r.ru_stime.tv_usec;
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}
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return ret;
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}
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#else /* ! defined (HAVE_WAIT4) */
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#ifdef HAVE_WAITPID
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#ifndef HAVE_GETRUSAGE
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static pid_t
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pex_wait (struct pex_obj *obj ATTRIBUTE_UNUSED, pid_t pid, int *status,
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struct pex_time *time)
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{
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if (time != NULL)
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memset (time, 0, sizeof (struct pex_time));
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return waitpid (pid, status, 0);
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}
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#else /* defined (HAVE_GETRUSAGE) */
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static pid_t
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pex_wait (struct pex_obj *obj ATTRIBUTE_UNUSED, pid_t pid, int *status,
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struct pex_time *time)
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{
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struct rusage r1, r2;
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pid_t ret;
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if (time == NULL)
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return waitpid (pid, status, 0);
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getrusage (RUSAGE_CHILDREN, &r1);
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ret = waitpid (pid, status, 0);
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if (ret < 0)
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return ret;
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getrusage (RUSAGE_CHILDREN, &r2);
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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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if (r2.ru_utime.tv_usec < r1.ru_utime.tv_usec)
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{
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--time->user_seconds;
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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_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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{
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--time->system_seconds;
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time->system_microseconds += 1000000;
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}
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return ret;
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}
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#endif /* defined (HAVE_GETRUSAGE) */
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#else /* ! defined (HAVE_WAITPID) */
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struct status_list
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{
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struct status_list *next;
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pid_t pid;
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int status;
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struct pex_time time;
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};
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static pid_t
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pex_wait (struct pex_obj *obj, pid_t pid, int *status, struct pex_time *time)
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{
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struct status_list **pp;
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for (pp = (struct status_list **) &obj->sysdep;
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*pp != NULL;
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pp = &(*pp)->next)
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{
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if ((*pp)->pid == pid)
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{
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struct status_list *p;
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p = *pp;
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*status = p->status;
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if (time != NULL)
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*time = p->time;
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*pp = p->next;
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free (p);
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return pid;
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}
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}
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while (1)
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{
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pid_t cpid;
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struct status_list *psl;
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struct pex_time pt;
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#ifdef HAVE_GETRUSAGE
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struct rusage r1, r2;
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#endif
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if (time != NULL)
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{
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#ifdef HAVE_GETRUSAGE
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getrusage (RUSAGE_CHILDREN, &r1);
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#else
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memset (&pt, 0, sizeof (struct pex_time));
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#endif
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}
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cpid = wait (status);
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#ifdef HAVE_GETRUSAGE
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if (time != NULL && cpid >= 0)
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{
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getrusage (RUSAGE_CHILDREN, &r2);
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pt.user_seconds = r2.ru_utime.tv_sec - r1.ru_utime.tv_sec;
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pt.user_microseconds = r2.ru_utime.tv_usec - r1.ru_utime.tv_usec;
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if (pt.user_microseconds < 0)
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{
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--pt.user_seconds;
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pt.user_microseconds += 1000000;
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}
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pt.system_seconds = r2.ru_stime.tv_sec - r1.ru_stime.tv_sec;
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pt.system_microseconds = r2.ru_stime.tv_usec - r1.ru_stime.tv_usec;
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if (pt.system_microseconds < 0)
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{
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--pt.system_seconds;
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pt.system_microseconds += 1000000;
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}
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}
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#endif
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if (cpid < 0 || cpid == pid)
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{
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if (time != NULL)
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*time = pt;
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return cpid;
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}
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psl = XNEW (struct status_list);
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psl->pid = cpid;
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psl->status = *status;
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if (time != NULL)
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psl->time = pt;
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psl->next = (struct status_list *) obj->sysdep;
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obj->sysdep = (void *) psl;
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}
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}
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#endif /* ! defined (HAVE_WAITPID) */
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#endif /* ! defined (HAVE_WAIT4) */
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static void pex_child_error (struct pex_obj *, const char *, const char *, int)
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ATTRIBUTE_NORETURN;
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static int pex_unix_open_read (struct pex_obj *, const char *, int);
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static int pex_unix_open_write (struct pex_obj *, const char *, int, int);
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static pid_t pex_unix_exec_child (struct pex_obj *, int, const char *,
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char * const *, char * const *,
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int, int, int, int,
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const char **, int *);
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static int pex_unix_close (struct pex_obj *, int);
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static int pex_unix_wait (struct pex_obj *, pid_t, int *, struct pex_time *,
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int, const char **, int *);
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static int pex_unix_pipe (struct pex_obj *, int *, int);
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static FILE *pex_unix_fdopenr (struct pex_obj *, int, int);
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static FILE *pex_unix_fdopenw (struct pex_obj *, int, int);
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static void pex_unix_cleanup (struct pex_obj *);
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/* The list of functions we pass to the common routines. */
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const struct pex_funcs funcs =
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{
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pex_unix_open_read,
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pex_unix_open_write,
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pex_unix_exec_child,
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pex_unix_close,
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pex_unix_wait,
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pex_unix_pipe,
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pex_unix_fdopenr,
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pex_unix_fdopenw,
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pex_unix_cleanup
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};
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/* Return a newly initialized pex_obj structure. */
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struct pex_obj *
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pex_init (int flags, const char *pname, const char *tempbase)
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{
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return pex_init_common (flags, pname, tempbase, &funcs);
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}
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/* Open a file for reading. */
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static int
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pex_unix_open_read (struct pex_obj *obj ATTRIBUTE_UNUSED, const char *name,
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int binary ATTRIBUTE_UNUSED)
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{
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return open (name, O_RDONLY);
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}
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/* Open a file for writing. */
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static int
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pex_unix_open_write (struct pex_obj *obj ATTRIBUTE_UNUSED, const char *name,
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int binary ATTRIBUTE_UNUSED, int append)
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{
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/* Note that we can't use O_EXCL here because gcc may have already
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created the temporary file via make_temp_file. */
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return open (name, O_WRONLY | O_CREAT
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| (append ? O_APPEND : O_TRUNC), PUBLIC_MODE);
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}
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/* Close a file. */
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static int
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pex_unix_close (struct pex_obj *obj ATTRIBUTE_UNUSED, int fd)
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{
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return close (fd);
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}
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/* Report an error from a child process. We don't use stdio routines,
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because we might be here due to a vfork call. */
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static void
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pex_child_error (struct pex_obj *obj, const char *executable,
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const char *errmsg, int err)
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{
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int retval = 0;
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#define writeerr(s) retval |= (write (STDERR_FILE_NO, s, strlen (s)) < 0)
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writeerr (obj->pname);
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writeerr (": error trying to exec '");
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writeerr (executable);
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writeerr ("': ");
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writeerr (errmsg);
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writeerr (": ");
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writeerr (xstrerror (err));
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writeerr ("\n");
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#undef writeerr
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/* Exit with -2 if the error output failed, too. */
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_exit (retval == 0 ? -1 : -2);
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}
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/* Execute a child. */
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extern char **environ;
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#if defined(HAVE_SPAWNVE) && defined(HAVE_SPAWNVPE)
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/* Implementation of pex->exec_child using the Cygwin spawn operation. */
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/* Subroutine of pex_unix_exec_child. Move OLD_FD to a new file descriptor
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to be stored in *PNEW_FD, save the flags in *PFLAGS, and arrange for the
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saved copy to be close-on-exec. Move CHILD_FD into OLD_FD. If CHILD_FD
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is -1, OLD_FD is to be closed. Return -1 on error. */
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static int
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save_and_install_fd(int *pnew_fd, int *pflags, int old_fd, int child_fd)
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{
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int new_fd, flags;
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flags = fcntl (old_fd, F_GETFD);
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/* If we could not retrieve the flags, then OLD_FD was not open. */
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if (flags < 0)
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{
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new_fd = -1, flags = 0;
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if (child_fd >= 0 && dup2 (child_fd, old_fd) < 0)
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return -1;
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}
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/* If we wish to close OLD_FD, just mark it CLOEXEC. */
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else if (child_fd == -1)
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{
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new_fd = old_fd;
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if ((flags & FD_CLOEXEC) == 0 && fcntl (old_fd, F_SETFD, FD_CLOEXEC) < 0)
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return -1;
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}
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/* Otherwise we need to save a copy of OLD_FD before installing CHILD_FD. */
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else
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{
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#ifdef F_DUPFD_CLOEXEC
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new_fd = fcntl (old_fd, F_DUPFD_CLOEXEC, 3);
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if (new_fd < 0)
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return -1;
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#else
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/* Prefer F_DUPFD over dup in order to avoid getting a new fd
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in the range 0-2, right where a new stderr fd might get put. */
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new_fd = fcntl (old_fd, F_DUPFD, 3);
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if (new_fd < 0)
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return -1;
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if (fcntl (new_fd, F_SETFD, FD_CLOEXEC) < 0)
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return -1;
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#endif
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if (dup2 (child_fd, old_fd) < 0)
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return -1;
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}
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*pflags = flags;
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if (pnew_fd)
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*pnew_fd = new_fd;
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else if (new_fd != old_fd)
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abort ();
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return 0;
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}
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/* Subroutine of pex_unix_exec_child. Move SAVE_FD back to OLD_FD
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restoring FLAGS. If SAVE_FD < 0, OLD_FD is to be closed. */
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static int
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restore_fd(int old_fd, int save_fd, int flags)
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{
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/* For SAVE_FD < 0, all we have to do is restore the
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"closed-ness" of the original. */
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if (save_fd < 0)
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return close (old_fd);
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/* For SAVE_FD == OLD_FD, all we have to do is restore the
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original setting of the CLOEXEC flag. */
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if (save_fd == old_fd)
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{
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if (flags & FD_CLOEXEC)
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return 0;
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return fcntl (old_fd, F_SETFD, flags);
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}
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/* Otherwise we have to move the descriptor back, restore the flags,
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and close the saved copy. */
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#ifdef HAVE_DUP3
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if (flags == FD_CLOEXEC)
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{
|
|
if (dup3 (save_fd, old_fd, O_CLOEXEC) < 0)
|
|
return -1;
|
|
}
|
|
else
|
|
#endif
|
|
{
|
|
if (dup2 (save_fd, old_fd) < 0)
|
|
return -1;
|
|
if (flags != 0 && fcntl (old_fd, F_SETFD, flags) < 0)
|
|
return -1;
|
|
}
|
|
return close (save_fd);
|
|
}
|
|
|
|
static pid_t
|
|
pex_unix_exec_child (struct pex_obj *obj ATTRIBUTE_UNUSED,
|
|
int flags, const char *executable,
|
|
char * const * argv, char * const * env,
|
|
int in, int out, int errdes, int toclose,
|
|
const char **errmsg, int *err)
|
|
{
|
|
int fl_in = 0, fl_out = 0, fl_err = 0, fl_tc = 0;
|
|
int save_in = -1, save_out = -1, save_err = -1;
|
|
int max, retries;
|
|
pid_t pid;
|
|
|
|
if (flags & PEX_STDERR_TO_STDOUT)
|
|
errdes = out;
|
|
|
|
/* We need the three standard file descriptors to be set up as for
|
|
the child before we perform the spawn. The file descriptors for
|
|
the parent need to be moved and marked for close-on-exec. */
|
|
if (in != STDIN_FILE_NO
|
|
&& save_and_install_fd (&save_in, &fl_in, STDIN_FILE_NO, in) < 0)
|
|
goto error_dup2;
|
|
if (out != STDOUT_FILE_NO
|
|
&& save_and_install_fd (&save_out, &fl_out, STDOUT_FILE_NO, out) < 0)
|
|
goto error_dup2;
|
|
if (errdes != STDERR_FILE_NO
|
|
&& save_and_install_fd (&save_err, &fl_err, STDERR_FILE_NO, errdes) < 0)
|
|
goto error_dup2;
|
|
if (toclose >= 0
|
|
&& save_and_install_fd (NULL, &fl_tc, toclose, -1) < 0)
|
|
goto error_dup2;
|
|
|
|
/* Now that we've moved the file descriptors for the child into place,
|
|
close the originals. Be careful not to close any of the standard
|
|
file descriptors that we just set up. */
|
|
max = -1;
|
|
if (errdes >= 0)
|
|
max = STDERR_FILE_NO;
|
|
else if (out >= 0)
|
|
max = STDOUT_FILE_NO;
|
|
else if (in >= 0)
|
|
max = STDIN_FILE_NO;
|
|
if (in > max)
|
|
close (in);
|
|
if (out > max)
|
|
close (out);
|
|
if (errdes > max && errdes != out)
|
|
close (errdes);
|
|
|
|
/* If we were not given an environment, use the global environment. */
|
|
if (env == NULL)
|
|
env = environ;
|
|
|
|
/* Launch the program. If we get EAGAIN (normally out of pid's), try
|
|
again a few times with increasing backoff times. */
|
|
retries = 0;
|
|
while (1)
|
|
{
|
|
typedef const char * const *cc_cp;
|
|
|
|
if (flags & PEX_SEARCH)
|
|
pid = spawnvpe (_P_NOWAITO, executable, (cc_cp)argv, (cc_cp)env);
|
|
else
|
|
pid = spawnve (_P_NOWAITO, executable, (cc_cp)argv, (cc_cp)env);
|
|
|
|
if (pid > 0)
|
|
break;
|
|
|
|
*err = errno;
|
|
*errmsg = "spawn";
|
|
if (errno != EAGAIN || ++retries == 4)
|
|
return (pid_t) -1;
|
|
sleep (1 << retries);
|
|
}
|
|
|
|
/* Success. Restore the parent's file descriptors that we saved above. */
|
|
if (toclose >= 0
|
|
&& restore_fd (toclose, toclose, fl_tc) < 0)
|
|
goto error_dup2;
|
|
if (in != STDIN_FILE_NO
|
|
&& restore_fd (STDIN_FILE_NO, save_in, fl_in) < 0)
|
|
goto error_dup2;
|
|
if (out != STDOUT_FILE_NO
|
|
&& restore_fd (STDOUT_FILE_NO, save_out, fl_out) < 0)
|
|
goto error_dup2;
|
|
if (errdes != STDERR_FILE_NO
|
|
&& restore_fd (STDERR_FILE_NO, save_err, fl_err) < 0)
|
|
goto error_dup2;
|
|
|
|
return pid;
|
|
|
|
error_dup2:
|
|
*err = errno;
|
|
*errmsg = "dup2";
|
|
return (pid_t) -1;
|
|
}
|
|
|
|
#else
|
|
/* Implementation of pex->exec_child using standard vfork + exec. */
|
|
|
|
static pid_t
|
|
pex_unix_exec_child (struct pex_obj *obj, int flags, const char *executable,
|
|
char * const * argv, char * const * env,
|
|
int in, int out, int errdes,
|
|
int toclose, const char **errmsg, int *err)
|
|
{
|
|
pid_t pid;
|
|
|
|
/* We declare these to be volatile to avoid warnings from gcc about
|
|
them being clobbered by vfork. */
|
|
volatile int sleep_interval;
|
|
volatile int retries;
|
|
|
|
/* We vfork and then set environ in the child before calling execvp.
|
|
This clobbers the parent's environ so we need to restore it.
|
|
It would be nice to use one of the exec* functions that takes an
|
|
environment as a parameter, but that may have portability issues. */
|
|
char **save_environ = environ;
|
|
|
|
sleep_interval = 1;
|
|
pid = -1;
|
|
for (retries = 0; retries < 4; ++retries)
|
|
{
|
|
pid = vfork ();
|
|
if (pid >= 0)
|
|
break;
|
|
sleep (sleep_interval);
|
|
sleep_interval *= 2;
|
|
}
|
|
|
|
switch (pid)
|
|
{
|
|
case -1:
|
|
*err = errno;
|
|
*errmsg = VFORK_STRING;
|
|
return (pid_t) -1;
|
|
|
|
case 0:
|
|
/* Child process. */
|
|
if (in != STDIN_FILE_NO)
|
|
{
|
|
if (dup2 (in, STDIN_FILE_NO) < 0)
|
|
pex_child_error (obj, executable, "dup2", errno);
|
|
if (close (in) < 0)
|
|
pex_child_error (obj, executable, "close", errno);
|
|
}
|
|
if (out != STDOUT_FILE_NO)
|
|
{
|
|
if (dup2 (out, STDOUT_FILE_NO) < 0)
|
|
pex_child_error (obj, executable, "dup2", errno);
|
|
if (close (out) < 0)
|
|
pex_child_error (obj, executable, "close", errno);
|
|
}
|
|
if (errdes != STDERR_FILE_NO)
|
|
{
|
|
if (dup2 (errdes, STDERR_FILE_NO) < 0)
|
|
pex_child_error (obj, executable, "dup2", errno);
|
|
if (close (errdes) < 0)
|
|
pex_child_error (obj, executable, "close", errno);
|
|
}
|
|
if (toclose >= 0)
|
|
{
|
|
if (close (toclose) < 0)
|
|
pex_child_error (obj, executable, "close", errno);
|
|
}
|
|
if ((flags & PEX_STDERR_TO_STDOUT) != 0)
|
|
{
|
|
if (dup2 (STDOUT_FILE_NO, STDERR_FILE_NO) < 0)
|
|
pex_child_error (obj, executable, "dup2", errno);
|
|
}
|
|
|
|
if (env)
|
|
{
|
|
/* NOTE: In a standard vfork implementation this clobbers the
|
|
parent's copy of environ "too" (in reality there's only one copy).
|
|
This is ok as we restore it below. */
|
|
environ = (char**) env;
|
|
}
|
|
|
|
if ((flags & PEX_SEARCH) != 0)
|
|
{
|
|
execvp (executable, to_ptr32 (argv));
|
|
pex_child_error (obj, executable, "execvp", errno);
|
|
}
|
|
else
|
|
{
|
|
execv (executable, to_ptr32 (argv));
|
|
pex_child_error (obj, executable, "execv", errno);
|
|
}
|
|
|
|
/* NOTREACHED */
|
|
return (pid_t) -1;
|
|
|
|
default:
|
|
/* Parent process. */
|
|
|
|
/* Restore environ.
|
|
Note that the parent either doesn't run until the child execs/exits
|
|
(standard vfork behaviour), or if it does run then vfork is behaving
|
|
more like fork. In either case we needn't worry about clobbering
|
|
the child's copy of environ. */
|
|
environ = save_environ;
|
|
|
|
if (in != STDIN_FILE_NO)
|
|
{
|
|
if (close (in) < 0)
|
|
{
|
|
*err = errno;
|
|
*errmsg = "close";
|
|
return (pid_t) -1;
|
|
}
|
|
}
|
|
if (out != STDOUT_FILE_NO)
|
|
{
|
|
if (close (out) < 0)
|
|
{
|
|
*err = errno;
|
|
*errmsg = "close";
|
|
return (pid_t) -1;
|
|
}
|
|
}
|
|
if (errdes != STDERR_FILE_NO)
|
|
{
|
|
if (close (errdes) < 0)
|
|
{
|
|
*err = errno;
|
|
*errmsg = "close";
|
|
return (pid_t) -1;
|
|
}
|
|
}
|
|
|
|
return pid;
|
|
}
|
|
}
|
|
#endif /* SPAWN */
|
|
|
|
/* Wait for a child process to complete. */
|
|
|
|
static int
|
|
pex_unix_wait (struct pex_obj *obj, pid_t pid, int *status,
|
|
struct pex_time *time, int done, const char **errmsg,
|
|
int *err)
|
|
{
|
|
/* If we are cleaning up when the caller didn't retrieve process
|
|
status for some reason, encourage the process to go away. */
|
|
if (done)
|
|
kill (pid, SIGTERM);
|
|
|
|
if (pex_wait (obj, pid, status, time) < 0)
|
|
{
|
|
*err = errno;
|
|
*errmsg = "wait";
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Create a pipe. */
|
|
|
|
static int
|
|
pex_unix_pipe (struct pex_obj *obj ATTRIBUTE_UNUSED, int *p,
|
|
int binary ATTRIBUTE_UNUSED)
|
|
{
|
|
return pipe (p);
|
|
}
|
|
|
|
/* Get a FILE pointer to read from a file descriptor. */
|
|
|
|
static FILE *
|
|
pex_unix_fdopenr (struct pex_obj *obj ATTRIBUTE_UNUSED, int fd,
|
|
int binary ATTRIBUTE_UNUSED)
|
|
{
|
|
return fdopen (fd, "r");
|
|
}
|
|
|
|
static FILE *
|
|
pex_unix_fdopenw (struct pex_obj *obj ATTRIBUTE_UNUSED, int fd,
|
|
int binary ATTRIBUTE_UNUSED)
|
|
{
|
|
if (fcntl (fd, F_SETFD, FD_CLOEXEC) < 0)
|
|
return NULL;
|
|
return fdopen (fd, "w");
|
|
}
|
|
|
|
static void
|
|
pex_unix_cleanup (struct pex_obj *obj ATTRIBUTE_UNUSED)
|
|
{
|
|
#if !defined (HAVE_WAIT4) && !defined (HAVE_WAITPID)
|
|
while (obj->sysdep != NULL)
|
|
{
|
|
struct status_list *this;
|
|
struct status_list *next;
|
|
|
|
this = (struct status_list *) obj->sysdep;
|
|
next = this->next;
|
|
free (this);
|
|
obj->sysdep = (void *) next;
|
|
}
|
|
#endif
|
|
}
|