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Makefile.in (CFILES): Add pex-*.c. 

* Makefile.in (CFILES): Add pex-*.c.
	(REQUIRED_OFILES): Change pexecute.o to @pexecute@
	(CONFIGURED_OFILES): Add pex-*.o.
	(TEXIFILES): Add pexecute.txh.
	(pexecute.o): Delete rule.
	(pex-cygwin.o, pex-djgpp.o, pex-mpw.o, pex-msdos.o, pex-os2.o,
	pex-unix.o, pex-win32.o): New rules.
	* configure.in: Change AC_INIT argument to xmalloc.c.
	Compute appropriate pexecute implementation and substitute it
	as @pexecute@.

	* pexecute.c: Split up into...
	* pex-cygwin.c, pex-djgpp.c, pex-mpw.c, pex-msdos.c, pex-os2.c,
	pex-unix.c, pex-win32.c, pex-common.h, pexecute.txh: ... these
	new files.

	* functions.texi: Regenerate.
	* configure: Regenerate.

From-SVN: r61728
This commit is contained in:
Zack Weinberg 2003-01-24 20:02:11 +00:00 committed by Zack Weinberg
parent 4c98b1b078
commit 55d0e5e022
15 changed files with 1225 additions and 843 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
libiberty/ChangeLog
View File

@ -1,3 +1,24 @@
2003-01-24 Zack Weinberg <zack@codesourcery.com>
* Makefile.in (CFILES): Add pex-*.c.
(REQUIRED_OFILES): Change pexecute.o to @pexecute@
(CONFIGURED_OFILES): Add pex-*.o.
(TEXIFILES): Add pexecute.txh.
(pexecute.o): Delete rule.
(pex-cygwin.o, pex-djgpp.o, pex-mpw.o, pex-msdos.o, pex-os2.o,
pex-unix.o, pex-win32.o): New rules.
* configure.in: Change AC_INIT argument to xmalloc.c.
Compute appropriate pexecute implementation and substitute it
as @pexecute@.
* pexecute.c: Split up into...
* pex-cygwin.c, pex-djgpp.c, pex-mpw.c, pex-msdos.c, pex-os2.c,
pex-unix.c, pex-win32.c, pex-common.h, pexecute.txh: ... these
new files.
* functions.texi: Regenerate.
* configure: Regenerate.
2003-01-20 Josef Zlomek <zlomekj@suse.cz> 2003-01-20 Josef Zlomek <zlomekj@suse.cz>
* hashtab.c (htab_expand): Fix allocation of new entries. * hashtab.c (htab_expand): Fix allocation of new entries.

21
libiberty/Makefile.in
View File

@ -140,7 +140,10 @@ CFILES = alloca.c argv.c asprintf.c atexit.c \
make-temp-file.c md5.c memchr.c memcmp.c memcpy.c memmove.c \ make-temp-file.c md5.c memchr.c memcmp.c memcpy.c memmove.c \
memset.c mkstemps.c \ memset.c mkstemps.c \
objalloc.c obstack.c \ objalloc.c obstack.c \
partition.c pexecute.c putenv.c \ partition.c \
pex-cygwin.c pex-djgpp.c pex-mpw.c pex-msdos.c pex-os2.c \
pex-unix.c pex-win32.c \
putenv.c \
random.c regex.c rename.c rindex.c \ random.c regex.c rename.c rindex.c \
safe-ctype.c setenv.c sigsetmask.c sort.c spaces.c \ safe-ctype.c setenv.c sigsetmask.c sort.c spaces.c \
splay-tree.c strcasecmp.c strchr.c strdup.c strerror.c \ splay-tree.c strcasecmp.c strchr.c strdup.c strerror.c \
@ -164,7 +167,7 @@ REQUIRED_OFILES = regex.o cplus-dem.o cp-demangle.o md5.o \
make-relative-prefix.o \ make-relative-prefix.o \
make-temp-file.o \ make-temp-file.o \
objalloc.o obstack.o \ objalloc.o obstack.o \
partition.o pexecute.o \ partition.o @pexecute@ \
safe-ctype.o sort.o spaces.o splay-tree.o strerror.o \ safe-ctype.o sort.o spaces.o splay-tree.o strerror.o \
strsignal.o \ strsignal.o \
ternary.o \ ternary.o \
@ -181,7 +184,9 @@ CONFIGURED_OFILES = asprintf.o atexit.o \
getcwd.o getpagesize.o \ getcwd.o getpagesize.o \
index.o insque.o \ index.o insque.o \
memchr.o memcmp.o memcpy.o memmove.o memset.o mkstemps.o \ memchr.o memcmp.o memcpy.o memmove.o memset.o mkstemps.o \
putenv.o \ pex-cygwin.o pex-djgpp.o pex-mpw.o pex-msdos.o pex-os2.o \
pex-unix.o pex-win32.o \
putenv.o \
random.o rename.o rindex.o \ random.o rename.o rindex.o \
setenv.o sigsetmask.o strcasecmp.o strchr.o strdup.o \ setenv.o sigsetmask.o strcasecmp.o strchr.o strdup.o \
strncasecmp.o strncmp.o strrchr.o strstr.o strtod.o strtol.o \ strncasecmp.o strncmp.o strrchr.o strstr.o strtod.o strtol.o \
@ -240,7 +245,7 @@ TEXISRC = \
# Additional files that have texi snippets that need to be collected # Additional files that have texi snippets that need to be collected
# and sorted. Some are here because the sources are imported from # and sorted. Some are here because the sources are imported from
# elsewhere. Others represent headers in ../include. # elsewhere. Others represent headers in ../include.
TEXIFILES = fnmatch.txh TEXIFILES = fnmatch.txh pexecute.txh
libiberty.info : $(srcdir)/libiberty.texi $(TEXISRC) libiberty.info : $(srcdir)/libiberty.texi $(TEXISRC)
$(MAKEINFO) -I$(srcdir) $(srcdir)/libiberty.texi $(MAKEINFO) -I$(srcdir) $(srcdir)/libiberty.texi
@ -450,8 +455,14 @@ objalloc.o: config.h $(INCDIR)/ansidecl.h $(INCDIR)/objalloc.h
obstack.o: config.h $(INCDIR)/obstack.h obstack.o: config.h $(INCDIR)/obstack.h
partition.o: config.h $(INCDIR)/ansidecl.h $(INCDIR)/libiberty.h \ partition.o: config.h $(INCDIR)/ansidecl.h $(INCDIR)/libiberty.h \
$(INCDIR)/partition.h $(INCDIR)/partition.h
pexecute.o: config.h $(INCDIR)/ansidecl.h $(INCDIR)/libiberty.h \ pex-cygwin.o: config.h pex-common.h $(INCDIR)/ansidecl.h $(INCDIR)/libiberty.h
pex-djgpp.o: config.h pex-common.h $(INCDIR)/ansidecl.h $(INCDIR)/libiberty.h
pex-mpw.o: config.h pex-common.h $(INCDIR)/ansidecl.h $(INCDIR)/libiberty.h
pex-msdos.o: config.h pex-common.h $(INCDIR)/ansidecl.h $(INCDIR)/libiberty.h \
$(INCDIR)/safe-ctype.h $(INCDIR)/safe-ctype.h
pex-os2.o: config.h pex-common.h $(INCDIR)/ansidecl.h $(INCDIR)/libiberty.h
pex-unix.o: config.h pex-common.h $(INCDIR)/ansidecl.h $(INCDIR)/libiberty.h
pex-win32.o: config.h pex-common.h $(INCDIR)/ansidecl.h $(INCDIR)/libiberty.h
putenv.o: config.h $(INCDIR)/ansidecl.h putenv.o: config.h $(INCDIR)/ansidecl.h
random.o: $(INCDIR)/ansidecl.h random.o: $(INCDIR)/ansidecl.h
regex.o: config.h $(INCDIR)/xregex.h $(INCDIR)/xregex2.h regex.o: config.h $(INCDIR)/xregex.h $(INCDIR)/xregex2.h

59
libiberty/configure vendored
View File

@ -465,7 +465,7 @@ echo > confdefs.h
# A filename unique to this package, relative to the directory that # A filename unique to this package, relative to the directory that
# configure is in, which we can look for to find out if srcdir is correct. # configure is in, which we can look for to find out if srcdir is correct.
ac_unique_file=pexecute.c ac_unique_file=xmalloc.c
# Find the source files, if location was not specified. # Find the source files, if location was not specified.
if test -z "$srcdir"; then if test -z "$srcdir"; then
@ -2993,21 +2993,32 @@ done
fi fi
for ac_hdr in stdlib.h unistd.h sys/stat.h sys/types.h # Figure out which version of pexecute to use.
case "${host}" in
*-*-cygwin*) pexecute=pex-cygwin.o ;;
*-*-mingw* | *-*-winnt*) pexecute=pex-win32.o ;;
*-*-msdosdjgpp*) pexecute=pex-djgpp.o ;;
*-*-msdos*) pexecute=pex-msdos.o ;;
*-*-os2-emx*) pexecute=pex-os2.o ;;
*) pexecute=pex-unix.o ;;
esac
for ac_hdr in unistd.h
do do
ac_safe=`echo "$ac_hdr" | sed 'y%./+-%__p_%'` ac_safe=`echo "$ac_hdr" | sed 'y%./+-%__p_%'`
echo $ac_n "checking for $ac_hdr""... $ac_c" 1>&6 echo $ac_n "checking for $ac_hdr""... $ac_c" 1>&6
echo "configure:3001: checking for $ac_hdr" >&5 echo "configure:3012: checking for $ac_hdr" >&5
if eval "test \"`echo '$''{'ac_cv_header_$ac_safe'+set}'`\" = set"; then if eval "test \"`echo '$''{'ac_cv_header_$ac_safe'+set}'`\" = set"; then
echo $ac_n "(cached) $ac_c" 1>&6 echo $ac_n "(cached) $ac_c" 1>&6
else else
cat > conftest.$ac_ext <<EOF cat > conftest.$ac_ext <<EOF
#line 3006 "configure" #line 3017 "configure"
#include "confdefs.h" #include "confdefs.h"
#include <$ac_hdr> #include <$ac_hdr>
EOF EOF
ac_try="$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out" ac_try="$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out"
{ (eval echo configure:3011: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; } { (eval echo configure:3022: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
ac_err=`grep -v '^ *+' conftest.out | grep -v "^conftest.${ac_ext}\$"` ac_err=`grep -v '^ *+' conftest.out | grep -v "^conftest.${ac_ext}\$"`
if test -z "$ac_err"; then if test -z "$ac_err"; then
rm -rf conftest* rm -rf conftest*
@ -3036,12 +3047,12 @@ done
for ac_func in getpagesize for ac_func in getpagesize
do do
echo $ac_n "checking for $ac_func""... $ac_c" 1>&6 echo $ac_n "checking for $ac_func""... $ac_c" 1>&6
echo "configure:3040: checking for $ac_func" >&5 echo "configure:3051: checking for $ac_func" >&5
if eval "test \"`echo '$''{'ac_cv_func_$ac_func'+set}'`\" = set"; then if eval "test \"`echo '$''{'ac_cv_func_$ac_func'+set}'`\" = set"; then
echo $ac_n "(cached) $ac_c" 1>&6 echo $ac_n "(cached) $ac_c" 1>&6
else else
cat > conftest.$ac_ext <<EOF cat > conftest.$ac_ext <<EOF
#line 3045 "configure" #line 3056 "configure"
#include "confdefs.h" #include "confdefs.h"
/* System header to define __stub macros and hopefully few prototypes, /* System header to define __stub macros and hopefully few prototypes,
which can conflict with char $ac_func(); below. */ which can conflict with char $ac_func(); below. */
@ -3064,7 +3075,7 @@ $ac_func();
; return 0; } ; return 0; }
EOF EOF
if { (eval echo configure:3068: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then if { (eval echo configure:3079: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
rm -rf conftest* rm -rf conftest*
eval "ac_cv_func_$ac_func=yes" eval "ac_cv_func_$ac_func=yes"
else else
@ -3089,7 +3100,7 @@ fi
done done
echo $ac_n "checking for working mmap""... $ac_c" 1>&6 echo $ac_n "checking for working mmap""... $ac_c" 1>&6
echo "configure:3093: checking for working mmap" >&5 echo "configure:3104: checking for working mmap" >&5
if eval "test \"`echo '$''{'ac_cv_func_mmap_fixed_mapped'+set}'`\" = set"; then if eval "test \"`echo '$''{'ac_cv_func_mmap_fixed_mapped'+set}'`\" = set"; then
echo $ac_n "(cached) $ac_c" 1>&6 echo $ac_n "(cached) $ac_c" 1>&6
else else
@ -3097,7 +3108,7 @@ else
ac_cv_func_mmap_fixed_mapped=no ac_cv_func_mmap_fixed_mapped=no
else else
cat > conftest.$ac_ext <<EOF cat > conftest.$ac_ext <<EOF
#line 3101 "configure" #line 3112 "configure"
#include "confdefs.h" #include "confdefs.h"
/* Thanks to Mike Haertel and Jim Avera for this test. /* Thanks to Mike Haertel and Jim Avera for this test.
@ -3125,24 +3136,11 @@ else
#include <fcntl.h> #include <fcntl.h>
#include <sys/mman.h> #include <sys/mman.h>
#if HAVE_SYS_TYPES_H
# include <sys/types.h>
#endif
#if HAVE_STDLIB_H
# include <stdlib.h>
#endif
#if HAVE_SYS_STAT_H
# include <sys/stat.h>
#endif
#if HAVE_UNISTD_H
# include <unistd.h>
#endif
/* This mess was copied from the GNU getpagesize.h. */ /* This mess was copied from the GNU getpagesize.h. */
#ifndef HAVE_GETPAGESIZE #ifndef HAVE_GETPAGESIZE
# ifdef HAVE_UNISTD_H
# include <unistd.h>
# endif
/* Assume that all systems that can run configure have sys/param.h. */ /* Assume that all systems that can run configure have sys/param.h. */
# ifndef HAVE_SYS_PARAM_H # ifndef HAVE_SYS_PARAM_H
@ -3250,7 +3248,7 @@ main()
} }
EOF EOF
if { (eval echo configure:3254: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null if { (eval echo configure:3252: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
then then
ac_cv_func_mmap_fixed_mapped=yes ac_cv_func_mmap_fixed_mapped=yes
else else
@ -3274,7 +3272,7 @@ fi
echo $ac_n "checking for working strncmp""... $ac_c" 1>&6 echo $ac_n "checking for working strncmp""... $ac_c" 1>&6
echo "configure:3278: checking for working strncmp" >&5 echo "configure:3276: checking for working strncmp" >&5
if eval "test \"`echo '$''{'ac_cv_func_strncmp_works'+set}'`\" = set"; then if eval "test \"`echo '$''{'ac_cv_func_strncmp_works'+set}'`\" = set"; then
echo $ac_n "(cached) $ac_c" 1>&6 echo $ac_n "(cached) $ac_c" 1>&6
else else
@ -3282,7 +3280,7 @@ else
ac_cv_func_strncmp_works=no ac_cv_func_strncmp_works=no
else else
cat > conftest.$ac_ext <<EOF cat > conftest.$ac_ext <<EOF
#line 3286 "configure" #line 3284 "configure"
#include "confdefs.h" #include "confdefs.h"
/* Test by Jim Wilson and Kaveh Ghazi. /* Test by Jim Wilson and Kaveh Ghazi.
@ -3346,7 +3344,7 @@ main ()
} }
EOF EOF
if { (eval echo configure:3350: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null if { (eval echo configure:3348: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
then then
ac_cv_func_strncmp_works=yes ac_cv_func_strncmp_works=yes
else else
@ -3541,6 +3539,7 @@ s%@CPP@%$CPP%g
s%@CHECK@%$CHECK%g s%@CHECK@%$CHECK%g
s%@target_header_dir@%$target_header_dir%g s%@target_header_dir@%$target_header_dir%g
s%@LIBOBJS@%$LIBOBJS%g s%@LIBOBJS@%$LIBOBJS%g
s%@pexecute@%$pexecute%g
s%@INSTALL_DEST@%$INSTALL_DEST%g s%@INSTALL_DEST@%$INSTALL_DEST%g
CEOF CEOF

13
libiberty/configure.in
View File

@ -1,7 +1,7 @@
dnl Process this file with autoconf to produce a configure script dnl Process this file with autoconf to produce a configure script
AC_PREREQ(2.13) AC_PREREQ(2.13)
AC_INIT(pexecute.c) AC_INIT(xmalloc.c)
# This works around the fact that libtool configuration may change LD # This works around the fact that libtool configuration may change LD
# for this particular configuration, but some shells, instead of # for this particular configuration, but some shells, instead of
@ -425,6 +425,17 @@ if test -z "${setobjs}"; then
AC_CHECK_FUNCS($checkfuncs) AC_CHECK_FUNCS($checkfuncs)
fi fi
# Figure out which version of pexecute to use.
case "${host}" in
*-*-cygwin*) pexecute=pex-cygwin.o ;;
*-*-mingw* | *-*-winnt*) pexecute=pex-win32.o ;;
*-*-msdosdjgpp*) pexecute=pex-djgpp.o ;;
*-*-msdos*) pexecute=pex-msdos.o ;;
*-*-os2-emx*) pexecute=pex-os2.o ;;
*) pexecute=pex-unix.o ;;
esac
AC_SUBST(pexecute)
libiberty_AC_FUNC_STRNCMP libiberty_AC_FUNC_STRNCMP
# Install a library built with a cross compiler in $(tooldir) rather # Install a library built with a cross compiler in $(tooldir) rather

33
libiberty/functions.texi
View File

@ -483,7 +483,7 @@ reading and writing.
@end deftypefn @end deftypefn
@c pexecute.c:67 @c pexecute.txh:1
@deftypefn Extension int pexecute (const char *@var{program}, char * const *@var{argv}, const char *@var{this_pname}, const char *@var{temp_base}, char **@var{errmsg_fmt}, char **@var{errmsg_arg}, int flags) @deftypefn Extension int pexecute (const char *@var{program}, char * const *@var{argv}, const char *@var{this_pname}, const char *@var{temp_base}, char **@var{errmsg_fmt}, char **@var{errmsg_arg}, int flags)
Executes a program. Executes a program.
@ -498,14 +498,15 @@ use if needed. This is currently only needed for MS-DOS ports that
don't use @code{go32} (do any still exist?). Ports that don't need it don't use @code{go32} (do any still exist?). Ports that don't need it
can pass @code{NULL}. can pass @code{NULL}.
(@code{@var{flags} & PEXECUTE_SEARCH}) is non-zero if @env{PATH} should be searched (@code{@var{flags} & PEXECUTE_SEARCH}) is non-zero if @env{PATH}
(??? It's not clear that GCC passes this flag correctly). (@code{@var{flags} & should be searched (??? It's not clear that GCC passes this flag
PEXECUTE_FIRST}) is nonzero for the first process in chain. correctly). (@code{@var{flags} & PEXECUTE_FIRST}) is nonzero for the
(@code{@var{flags} & PEXECUTE_FIRST}) is nonzero for the last process first process in chain. (@code{@var{flags} & PEXECUTE_FIRST}) is
in chain. The first/last flags could be simplified to only mark the nonzero for the last process in chain. The first/last flags could be
last of a chain of processes but that requires the caller to always simplified to only mark the last of a chain of processes but that
mark the last one (and not give up early if some error occurs). requires the caller to always mark the last one (and not give up
It's more robust to require the caller to mark both ends of the chain. early if some error occurs). It's more robust to require the caller
to mark both ends of the chain.
The result is the pid on systems like Unix where we The result is the pid on systems like Unix where we
@code{fork}/@code{exec} and on systems like WIN32 and OS/2 where we @code{fork}/@code{exec} and on systems like WIN32 and OS/2 where we
@ -540,21 +541,23 @@ name is unset/removed.
@end deftypefn @end deftypefn
@c pexecute.c:104 @c pexecute.txh:39
@deftypefn Extension int pwait (int @var{pid}, int *@var{status}, int @var{flags}) @deftypefn Extension int pwait (int @var{pid}, int *@var{status}, int @var{flags})
Waits for a program started by @code{pexecute} to finish. Waits for a program started by @code{pexecute} to finish.
@var{pid} is the process id of the task to wait for. @var{status} is @var{pid} is the process id of the task to wait for. @var{status} is
the `status' argument to wait. @var{flags} is currently unused (allows the `status' argument to wait. @var{flags} is currently unused
future enhancement without breaking upward compatibility). Pass 0 for now. (allows future enhancement without breaking upward compatibility).
Pass 0 for now.
The result is the pid of the child reaped, or -1 for failure The result is the pid of the child reaped, or -1 for failure
(@code{errno} says why). (@code{errno} says why).
On systems that don't support waiting for a particular child, @var{pid} is On systems that don't support waiting for a particular child,
ignored. On systems like MS-DOS that don't really multitask @code{pwait} @var{pid} is ignored. On systems like MS-DOS that don't really
is just a mechanism to provide a consistent interface for the caller. multitask @code{pwait} is just a mechanism to provide a consistent
interface for the caller.
@end deftypefn @end deftypefn

42
libiberty/pex-common.h Normal file
View File

@ -0,0 +1,42 @@
/* Utilities to execute a program in a subprocess (possibly linked by pipes
with other subprocesses), and wait for it. Shared logic.
Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2003
Free Software Foundation, Inc.
This file is part of the libiberty library.
Libiberty is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
Libiberty is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with libiberty; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#ifndef PEX_COMMON_H
#define PEX_COMMON_H
#include "config.h"
#include "libiberty.h"
#define install_error_msg "installation problem, cannot exec `%s'"
/* stdin file number. */
#define STDIN_FILE_NO 0
/* stdout file number. */
#define STDOUT_FILE_NO 1
/* value of `pipe': port index for reading. */
#define READ_PORT 0
/* value of `pipe': port index for writing. */
#define WRITE_PORT 1
#endif

132
libiberty/pex-cygwin.c Normal file
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@ -0,0 +1,132 @@
/* Utilities to execute a program in a subprocess (possibly linked by pipes
with other subprocesses), and wait for it. Cygwin specialization.
Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2003
Free Software Foundation, Inc.
This file is part of the libiberty library.
Libiberty is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
Libiberty is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with libiberty; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include "pex-common.h"
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_SYS_WAIT_H
#include <sys/wait.h>
#endif
#include <process.h>
#include <io.h>
#include <fcntl.h>
#include <signal.h>
extern int _spawnv ();
extern int _spawnvp ();
/* Win32 supports pipes, and Cygwin provides waitpid. */
int
pexecute (program, argv, this_pname, temp_base, errmsg_fmt, errmsg_arg, flags)
const char *program;
char * const *argv;
const char *this_pname;
const char *temp_base;
char **errmsg_fmt, **errmsg_arg;
int flags;
{
int pid;
int pdes[2], org_stdin, org_stdout;
int input_desc, output_desc;
int retries, sleep_interval;
/* Pipe waiting from last process, to be used as input for the next one.
Value is STDIN_FILE_NO if no pipe is waiting
(i.e. the next command is the first of a group). */
static int last_pipe_input;
/* If this is the first process, initialize. */
if (flags & PEXECUTE_FIRST)
last_pipe_input = STDIN_FILE_NO;
input_desc = last_pipe_input;
/* If this isn't the last process, make a pipe for its output,
and record it as waiting to be the input to the next process. */
if (! (flags & PEXECUTE_LAST))
{
if (_pipe (pdes, 256, O_BINARY) < 0)
{
*errmsg_fmt = "pipe";
*errmsg_arg = NULL;
return -1;
}
output_desc = pdes[WRITE_PORT];
last_pipe_input = pdes[READ_PORT];
}
else
{
/* Last process. */
output_desc = STDOUT_FILE_NO;
last_pipe_input = STDIN_FILE_NO;
}
if (input_desc != STDIN_FILE_NO)
{
org_stdin = dup (STDIN_FILE_NO);
dup2 (input_desc, STDIN_FILE_NO);
close (input_desc);
}
if (output_desc != STDOUT_FILE_NO)
{
org_stdout = dup (STDOUT_FILE_NO);
dup2 (output_desc, STDOUT_FILE_NO);
close (output_desc);
}
pid = (flags & PEXECUTE_SEARCH ? _spawnvp : _spawnv)
(_P_NOWAIT, program, argv);
if (input_desc != STDIN_FILE_NO)
{
dup2 (org_stdin, STDIN_FILE_NO);
close (org_stdin);
}
if (output_desc != STDOUT_FILE_NO)
{
dup2 (org_stdout, STDOUT_FILE_NO);
close (org_stdout);
}
if (pid == -1)
{
*errmsg_fmt = install_error_msg;
*errmsg_arg = program;
return -1;
}
return pid;
}
int
pwait (pid, status, flags)
int pid;
int *status;
int flags ATTRIBUTE_UNUSED;
{
return waitpid (pid, status, 0);
}

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/* Utilities to execute a program in a subprocess (possibly linked by pipes
with other subprocesses), and wait for it. DJGPP specialization.
Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2003
Free Software Foundation, Inc.
This file is part of the libiberty library.
Libiberty is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
Libiberty is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with libiberty; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include "pex-common.h"
#include <stdio.h>
#include <errno.h>
#ifdef NEED_DECLARATION_ERRNO
extern int errno;
#endif
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#include <process.h>
/* Use ECHILD if available, otherwise use EINVAL. */
#ifdef ECHILD
#define PWAIT_ERROR ECHILD
#else
#define PWAIT_ERROR EINVAL
#endif
/* MSDOS doesn't multitask, but for the sake of a consistent interface
the code behaves like it does. pexecute runs the program, tucks the
exit code away, and returns a "pid". pwait must be called to fetch the
exit code. */
/* For communicating information from pexecute to pwait. */
static int last_pid = 0;
static int last_status = 0;
static int last_reaped = 0;
int
pexecute (program, argv, this_pname, temp_base, errmsg_fmt, errmsg_arg, flags)
const char *program;
char * const *argv;
const char *this_pname;
const char *temp_base;
char **errmsg_fmt, **errmsg_arg;
int flags;
{
int rc;
last_pid++;
if (last_pid < 0)
last_pid = 1;
if ((flags & PEXECUTE_ONE) != PEXECUTE_ONE)
abort ();
/* ??? What are the possible return values from spawnv? */
rc = (flags & PEXECUTE_SEARCH ? spawnvp : spawnv) (P_WAIT, program, argv);
if (rc == -1)
{
*errmsg_fmt = install_error_msg;
*errmsg_arg = (char *)program;
return -1;
}
/* Tuck the status away for pwait, and return a "pid". */
last_status = rc << 8;
return last_pid;
}
int
pwait (pid, status, flags)
int pid;
int *status;
int flags;
{
/* On MSDOS each pexecute must be followed by its associated pwait. */
if (pid != last_pid
/* Called twice for the same child? */
|| pid == last_reaped)
{
errno = PWAIT_ERROR;
return -1;
}
/* ??? Here's an opportunity to canonicalize the values in STATUS.
Needed? */
*status = (last_status >> 8);
last_reaped = last_pid;
return last_pid;
}

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/* Utilities to execute a program in a subprocess (possibly linked by pipes
with other subprocesses), and wait for it. MPW specialization.
Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2003
Free Software Foundation, Inc.
This file is part of the libiberty library.
Libiberty is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
Libiberty is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with libiberty; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include "pex-common.h"
#include <stdio.h>
#ifdef HAVE_STRING_H
#include <string.h>
#endif
/* MPW pexecute doesn't actually run anything; instead, it writes out
script commands that, when run, will do the actual executing.
For example, in GCC's case, GCC will write out several script commands:
cpp ...
cc1 ...
as ...
ld ...
and then exit. None of the above programs will have run yet. The task
that called GCC will then execute the script and cause cpp,etc. to run.
The caller must invoke pfinish before calling exit. This adds
the finishing touches to the generated script. */
static int first_time = 1;
extern void mpwify_filename PARAMS ((const char *, char *));
int
pexecute (program, argv, this_pname, temp_base, errmsg_fmt, errmsg_arg, flags)
const char *program;
char * const *argv;
const char *this_pname;
const char *temp_base;
char **errmsg_fmt, **errmsg_arg;
int flags;
{
char tmpprogram[255];
char *cp, *tmpname;
int i;
mpwify_filename (program, tmpprogram);
if (first_time)
{
printf ("Set Failed 0\n");
first_time = 0;
}
fputs ("If {Failed} == 0\n", stdout);
/* If being verbose, output a copy of the command. It should be
accurate enough and escaped enough to be "clickable". */
if (flags & PEXECUTE_VERBOSE)
{
fputs ("\tEcho ", stdout);
fputc ('\'', stdout);
fputs (tmpprogram, stdout);
fputc ('\'', stdout);
fputc (' ', stdout);
for (i=1; argv[i]; i++)
{
fputc ('\'', stdout);
/* See if we have an argument that needs fixing. */
if (strchr(argv[i], '/'))
{
tmpname = (char *) xmalloc (256);
mpwify_filename (argv[i], tmpname);
argv[i] = tmpname;
}
for (cp = argv[i]; *cp; cp++)
{
/* Write an Option-d escape char in front of special chars. */
if (strchr("'+", *cp))
fputc ('\266', stdout);
fputc (*cp, stdout);
}
fputc ('\'', stdout);
fputc (' ', stdout);
}
fputs ("\n", stdout);
}
fputs ("\t", stdout);
fputs (tmpprogram, stdout);
fputc (' ', stdout);
for (i=1; argv[i]; i++)
{
/* See if we have an argument that needs fixing. */
if (strchr(argv[i], '/'))
{
tmpname = (char *) xmalloc (256);
mpwify_filename (argv[i], tmpname);
argv[i] = tmpname;
}
if (strchr (argv[i], ' '))
fputc ('\'', stdout);
for (cp = argv[i]; *cp; cp++)
{
/* Write an Option-d escape char in front of special chars. */
if (strchr("'+", *cp))
fputc ('\266', stdout);
fputc (*cp, stdout);
}
if (strchr (argv[i], ' '))
fputc ('\'', stdout);
fputc (' ', stdout);
}
fputs ("\n", stdout);
/* Output commands that arrange to clean up and exit if a failure occurs.
We have to be careful to collect the status from the program that was
run, rather than some other script command. Also, we don't exit
immediately, since necessary cleanups are at the end of the script. */
fputs ("\tSet TmpStatus {Status}\n", stdout);
fputs ("\tIf {TmpStatus} != 0\n", stdout);
fputs ("\t\tSet Failed {TmpStatus}\n", stdout);
fputs ("\tEnd\n", stdout);
fputs ("End\n", stdout);
/* We're just composing a script, can't fail here. */
return 0;
}
int
pwait (pid, status, flags)
int pid;
int *status;
int flags;
{
*status = 0;
return 0;
}
/* Write out commands that will exit with the correct error code
if something in the script failed. */
void
pfinish ()
{
printf ("\tExit \"{Failed}\"\n");
}

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/* Utilities to execute a program in a subprocess (possibly linked by pipes
with other subprocesses), and wait for it. Generic MSDOS specialization.
Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2003
Free Software Foundation, Inc.
This file is part of the libiberty library.
Libiberty is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
Libiberty is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with libiberty; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include "pex-common.h"
#include <stdio.h>
#include <errno.h>
#ifdef NEED_DECLARATION_ERRNO
extern int errno;
#endif
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#include "safe-ctype.h"
#include <process.h>
/* MSDOS doesn't multitask, but for the sake of a consistent interface
the code behaves like it does. pexecute runs the program, tucks the
exit code away, and returns a "pid". pwait must be called to fetch the
exit code. */
/* For communicating information from pexecute to pwait. */
static int last_pid = 0;
static int last_status = 0;
static int last_reaped = 0;
int
pexecute (program, argv, this_pname, temp_base, errmsg_fmt, errmsg_arg, flags)
const char *program;
char * const *argv;
const char *this_pname;
const char *temp_base;
char **errmsg_fmt, **errmsg_arg;
int flags;
{
int rc;
char *scmd, *rf;
FILE *argfile;
int i, el = flags & PEXECUTE_SEARCH ? 4 : 0;
last_pid++;
if (last_pid < 0)
last_pid = 1;
if ((flags & PEXECUTE_ONE) != PEXECUTE_ONE)
abort ();
if (temp_base == 0)
temp_base = choose_temp_base ();
scmd = (char *) xmalloc (strlen (program) + strlen (temp_base) + 6 + el);
rf = scmd + strlen(program) + 2 + el;
sprintf (scmd, "%s%s @%s.gp", program,
(flags & PEXECUTE_SEARCH ? ".exe" : ""), temp_base);
argfile = fopen (rf, "w");
if (argfile == 0)
{
int errno_save = errno;
free (scmd);
errno = errno_save;
*errmsg_fmt = "cannot open `%s.gp'";
*errmsg_arg = temp_base;
return -1;
}
for (i=1; argv[i]; i++)
{
char *cp;
for (cp = argv[i]; *cp; cp++)
{
if (*cp == '"' || *cp == '\'' || *cp == '\\' || ISSPACE (*cp))
fputc ('\\', argfile);
fputc (*cp, argfile);
}
fputc ('\n', argfile);
}
fclose (argfile);
rc = system (scmd);
{
int errno_save = errno;
remove (rf);
free (scmd);
errno = errno_save;
}
if (rc == -1)
{
*errmsg_fmt = install_error_msg;
*errmsg_arg = (char *)program;
return -1;
}
/* Tuck the status away for pwait, and return a "pid". */
last_status = rc << 8;
return last_pid;
}
/* Use ECHILD if available, otherwise use EINVAL. */
#ifdef ECHILD
#define PWAIT_ERROR ECHILD
#else
#define PWAIT_ERROR EINVAL
#endif
int
pwait (pid, status, flags)
int pid;
int *status;
int flags;
{
/* On MSDOS each pexecute must be followed by its associated pwait. */
if (pid != last_pid
/* Called twice for the same child? */
|| pid == last_reaped)
{
errno = PWAIT_ERROR;
return -1;
}
/* ??? Here's an opportunity to canonicalize the values in STATUS.
Needed? */
*status = last_status;
last_reaped = last_pid;
return last_pid;
}

72
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/* Utilities to execute a program in a subprocess (possibly linked by pipes
with other subprocesses), and wait for it. OS/2 specialization.
Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2003
Free Software Foundation, Inc.
This file is part of the libiberty library.
Libiberty is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
Libiberty is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with libiberty; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include "pex-common.h"
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#ifdef HAVE_SYS_WAIT_H
#include <sys/wait.h>
#endif
/* ??? Does OS2 have process.h? */
extern int spawnv ();
extern int spawnvp ();
int
pexecute (program, argv, this_pname, temp_base, errmsg_fmt, errmsg_arg, flags)
const char *program;
char * const *argv;
const char *this_pname;
const char *temp_base;
char **errmsg_fmt, **errmsg_arg;
int flags;
{
int pid;
if ((flags & PEXECUTE_ONE) != PEXECUTE_ONE)
abort ();
/* ??? Presumably 1 == _P_NOWAIT. */
pid = (flags & PEXECUTE_SEARCH ? spawnvp : spawnv) (1, program, argv);
if (pid == -1)
{
*errmsg_fmt = install_error_msg;
*errmsg_arg = program;
return -1;
}
return pid;
}
int
pwait (pid, status, flags)
int pid;
int *status;
int flags;
{
/* ??? Here's an opportunity to canonicalize the values in STATUS.
Needed? */
int pid = wait (status);
return pid;
}

166
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/* Utilities to execute a program in a subprocess (possibly linked by pipes
with other subprocesses), and wait for it. Generic Unix version
(also used for UWIN and VMS).
Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2003
Free Software Foundation, Inc.
This file is part of the libiberty library.
Libiberty is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
Libiberty is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with libiberty; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include "pex-common.h"
#include <stdio.h>
#include <errno.h>
#ifdef NEED_DECLARATION_ERRNO
extern int errno;
#endif
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#ifdef HAVE_SYS_WAIT_H
#include <sys/wait.h>
#endif
#ifndef HAVE_WAITPID
#define waitpid(pid, status, flags) wait(status)
#endif
extern int execv ();
extern int execvp ();
int
pexecute (program, argv, this_pname, temp_base, errmsg_fmt, errmsg_arg, flags)
const char *program;
char * const *argv;
const char *this_pname;
const char *temp_base ATTRIBUTE_UNUSED;
char **errmsg_fmt, **errmsg_arg;
int flags;
{
int (*func)() = (flags & PEXECUTE_SEARCH ? execvp : execv);
int pid;
int pdes[2];
int input_desc, output_desc;
int retries, sleep_interval;
/* Pipe waiting from last process, to be used as input for the next one.
Value is STDIN_FILE_NO if no pipe is waiting
(i.e. the next command is the first of a group). */
static int last_pipe_input;
/* If this is the first process, initialize. */
if (flags & PEXECUTE_FIRST)
last_pipe_input = STDIN_FILE_NO;
input_desc = last_pipe_input;
/* If this isn't the last process, make a pipe for its output,
and record it as waiting to be the input to the next process. */
if (! (flags & PEXECUTE_LAST))
{
if (pipe (pdes) < 0)
{
*errmsg_fmt = "pipe";
*errmsg_arg = NULL;
return -1;
}
output_desc = pdes[WRITE_PORT];
last_pipe_input = pdes[READ_PORT];
}
else
{
/* Last process. */
output_desc = STDOUT_FILE_NO;
last_pipe_input = STDIN_FILE_NO;
}
/* Fork a subprocess; wait and retry if it fails. */
sleep_interval = 1;
pid = -1;
for (retries = 0; retries < 4; retries++)
{
pid = fork ();
if (pid >= 0)
break;
sleep (sleep_interval);
sleep_interval *= 2;
}
switch (pid)
{
case -1:
*errmsg_fmt = "fork";
*errmsg_arg = NULL;
return -1;
case 0: /* child */
/* Move the input and output pipes into place, if necessary. */
if (input_desc != STDIN_FILE_NO)
{
close (STDIN_FILE_NO);
dup (input_desc);
close (input_desc);
}
if (output_desc != STDOUT_FILE_NO)
{
close (STDOUT_FILE_NO);
dup (output_desc);
close (output_desc);
}
/* Close the parent's descs that aren't wanted here. */
if (last_pipe_input != STDIN_FILE_NO)
close (last_pipe_input);
/* Exec the program. */
(*func) (program, argv);
fprintf (stderr, "%s: ", this_pname);
fprintf (stderr, install_error_msg, program);
fprintf (stderr, ": %s\n", xstrerror (errno));
exit (-1);
/* NOTREACHED */
return 0;
default:
/* In the parent, after forking.
Close the descriptors that we made for this child. */
if (input_desc != STDIN_FILE_NO)
close (input_desc);
if (output_desc != STDOUT_FILE_NO)
close (output_desc);
/* Return child's process number. */
return pid;
}
}
int
pwait (pid, status, flags)
int pid;
int *status;
int flags ATTRIBUTE_UNUSED;
{
/* ??? Here's an opportunity to canonicalize the values in STATUS.
Needed? */
pid = waitpid (pid, status, 0);
return pid;
}

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/* Utilities to execute a program in a subprocess (possibly linked by pipes
with other subprocesses), and wait for it. Generic Win32 specialization.
Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2003
Free Software Foundation, Inc.
This file is part of the libiberty library.
Libiberty is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
Libiberty is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with libiberty; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include "pex-common.h"
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_SYS_WAIT_H
#include <sys/wait.h>
#endif
#include <process.h>
#include <io.h>
#include <fcntl.h>
#include <signal.h>
/* mingw32 headers may not define the following. */
#ifndef _P_WAIT
# define _P_WAIT 0
# define _P_NOWAIT 1
# define _P_OVERLAY 2
# define _P_NOWAITO 3
# define _P_DETACH 4
# define WAIT_CHILD 0
# define WAIT_GRANDCHILD 1
#endif
/* This is a kludge to get around the Microsoft C spawn functions' propensity
to remove the outermost set of double quotes from all arguments. */
static const char * const *
fix_argv (argvec)
char **argvec;
{
int i;
for (i = 1; argvec[i] != 0; i++)
{
int len, j;
char *temp, *newtemp;
temp = argvec[i];
len = strlen (temp);
for (j = 0; j < len; j++)
{
if (temp[j] == '"')
{
newtemp = xmalloc (len + 2);
strncpy (newtemp, temp, j);
newtemp [j] = '\\';
strncpy (&newtemp [j+1], &temp [j], len-j);
newtemp [len+1] = 0;
temp = newtemp;
len++;
j++;
}
}
argvec[i] = temp;
}
for (i = 0; argvec[i] != 0; i++)
{
if (strpbrk (argvec[i], " \t"))
{
int len, trailing_backslash;
char *temp;
len = strlen (argvec[i]);
trailing_backslash = 0;
/* There is an added complication when an arg with embedded white
space ends in a backslash (such as in the case of -iprefix arg
passed to cpp). The resulting quoted strings gets misinterpreted
by the command interpreter -- it thinks that the ending quote
is escaped by the trailing backslash and things get confused.
We handle this case by escaping the trailing backslash, provided
it was not escaped in the first place. */
if (len > 1
&& argvec[i][len-1] == '\\'
&& argvec[i][len-2] != '\\')
{
trailing_backslash = 1;
++len; /* to escape the final backslash. */
}
len += 2; /* and for the enclosing quotes. */
temp = xmalloc (len + 1);
temp[0] = '"';
strcpy (temp + 1, argvec[i]);
if (trailing_backslash)
temp[len-2] = '\\';
temp[len-1] = '"';
temp[len] = '\0';
argvec[i] = temp;
}
}
return (const char * const *) argvec;
}
/* Win32 supports pipes */
int
pexecute (program, argv, this_pname, temp_base, errmsg_fmt, errmsg_arg, flags)
const char *program;
char * const *argv;
const char *this_pname;
const char *temp_base;
char **errmsg_fmt, **errmsg_arg;
int flags;
{
int pid;
int pdes[2], org_stdin, org_stdout;
int input_desc, output_desc;
int retries, sleep_interval;
/* Pipe waiting from last process, to be used as input for the next one.
Value is STDIN_FILE_NO if no pipe is waiting
(i.e. the next command is the first of a group). */
static int last_pipe_input;
/* If this is the first process, initialize. */
if (flags & PEXECUTE_FIRST)
last_pipe_input = STDIN_FILE_NO;
input_desc = last_pipe_input;
/* If this isn't the last process, make a pipe for its output,
and record it as waiting to be the input to the next process. */
if (! (flags & PEXECUTE_LAST))
{
if (_pipe (pdes, 256, O_BINARY) < 0)
{
*errmsg_fmt = "pipe";
*errmsg_arg = NULL;
return -1;
}
output_desc = pdes[WRITE_PORT];
last_pipe_input = pdes[READ_PORT];
}
else
{
/* Last process. */
output_desc = STDOUT_FILE_NO;
last_pipe_input = STDIN_FILE_NO;
}
if (input_desc != STDIN_FILE_NO)
{
org_stdin = dup (STDIN_FILE_NO);
dup2 (input_desc, STDIN_FILE_NO);
close (input_desc);
}
if (output_desc != STDOUT_FILE_NO)
{
org_stdout = dup (STDOUT_FILE_NO);
dup2 (output_desc, STDOUT_FILE_NO);
close (output_desc);
}
pid = (flags & PEXECUTE_SEARCH ? _spawnvp : _spawnv)
(_P_NOWAIT, program, fix_argv(argv));
if (input_desc != STDIN_FILE_NO)
{
dup2 (org_stdin, STDIN_FILE_NO);
close (org_stdin);
}
if (output_desc != STDOUT_FILE_NO)
{
dup2 (org_stdout, STDOUT_FILE_NO);
close (org_stdout);
}
if (pid == -1)
{
*errmsg_fmt = install_error_msg;
*errmsg_arg = program;
return -1;
}
return pid;
}
/* MS CRTDLL doesn't return enough information in status to decide if the
child exited due to a signal or not, rather it simply returns an
integer with the exit code of the child; eg., if the child exited with
an abort() call and didn't have a handler for SIGABRT, it simply returns
with status = 3. We fix the status code to conform to the usual WIF*
macros. Note that WIFSIGNALED will never be true under CRTDLL. */
int
pwait (pid, status, flags)
int pid;
int *status;
int flags;
{
int termstat;
pid = _cwait (&termstat, pid, WAIT_CHILD);
/* ??? Here's an opportunity to canonicalize the values in STATUS.
Needed? */
/* cwait returns the child process exit code in termstat.
A value of 3 indicates that the child caught a signal, but not
which one. Since only SIGABRT, SIGFPE and SIGINT do anything, we
report SIGABRT. */
if (termstat == 3)
*status = SIGABRT;
else
*status = (((termstat) & 0xff) << 8);
return pid;
}

792
libiberty/pexecute.c
View File

@ -1,792 +0,0 @@
/* Utilities to execute a program in a subprocess (possibly linked by pipes
with other subprocesses), and wait for it.
Copyright (C) 1996-2000 Free Software Foundation, Inc.
This file is part of the libiberty library.
Libiberty is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
Libiberty is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with libiberty; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
/* This file exports two functions: pexecute and pwait. */
/* This file lives in at least two places: libiberty and gcc.
Don't change one without the other. */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdio.h>
#include <errno.h>
#ifdef NEED_DECLARATION_ERRNO
extern int errno;
#endif
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#ifdef HAVE_SYS_WAIT_H
#include <sys/wait.h>
#endif
#include "libiberty.h"
#include "safe-ctype.h"
/* stdin file number. */
#define STDIN_FILE_NO 0
/* stdout file number. */
#define STDOUT_FILE_NO 1
/* value of `pipe': port index for reading. */
#define READ_PORT 0
/* value of `pipe': port index for writing. */
#define WRITE_PORT 1
static char *install_error_msg = "installation problem, cannot exec `%s'";
/* pexecute: execute a program.
@deftypefn Extension int pexecute (const char *@var{program}, char * const *@var{argv}, const char *@var{this_pname}, const char *@var{temp_base}, char **@var{errmsg_fmt}, char **@var{errmsg_arg}, int flags)
Executes a program.
@var{program} and @var{argv} are the arguments to
@code{execv}/@code{execvp}.
@var{this_pname} is name of the calling program (i.e., @code{argv[0]}).
@var{temp_base} is the path name, sans suffix, of a temporary file to
use if needed. This is currently only needed for MS-DOS ports that
don't use @code{go32} (do any still exist?). Ports that don't need it
can pass @code{NULL}.
(@code{@var{flags} & PEXECUTE_SEARCH}) is non-zero if @env{PATH} should be searched
(??? It's not clear that GCC passes this flag correctly). (@code{@var{flags} &
PEXECUTE_FIRST}) is nonzero for the first process in chain.
(@code{@var{flags} & PEXECUTE_FIRST}) is nonzero for the last process
in chain. The first/last flags could be simplified to only mark the
last of a chain of processes but that requires the caller to always
mark the last one (and not give up early if some error occurs).
It's more robust to require the caller to mark both ends of the chain.
The result is the pid on systems like Unix where we
@code{fork}/@code{exec} and on systems like WIN32 and OS/2 where we
use @code{spawn}. It is up to the caller to wait for the child.
The result is the @code{WEXITSTATUS} on systems like MS-DOS where we
@code{spawn} and wait for the child here.
Upon failure, @var{errmsg_fmt} and @var{errmsg_arg} are set to the
text of the error message with an optional argument (if not needed,
@var{errmsg_arg} is set to @code{NULL}), and @minus{}1 is returned.
@code{errno} is available to the caller to use.
@end deftypefn
@deftypefn Extension int pwait (int @var{pid}, int *@var{status}, int @var{flags})
Waits for a program started by @code{pexecute} to finish.
@var{pid} is the process id of the task to wait for. @var{status} is
the `status' argument to wait. @var{flags} is currently unused (allows
future enhancement without breaking upward compatibility). Pass 0 for now.
The result is the pid of the child reaped, or -1 for failure
(@code{errno} says why).
On systems that don't support waiting for a particular child, @var{pid} is
ignored. On systems like MS-DOS that don't really multitask @code{pwait}
is just a mechanism to provide a consistent interface for the caller.
@end deftypefn
@undocumented pfinish
pfinish: finish generation of script
pfinish is necessary for systems like MPW where a script is generated that
runs the requested programs. */
#ifdef __MSDOS__
/* MSDOS doesn't multitask, but for the sake of a consistent interface
the code behaves like it does. pexecute runs the program, tucks the
exit code away, and returns a "pid". pwait must be called to fetch the
exit code. */
#include <process.h>
/* For communicating information from pexecute to pwait. */
static int last_pid = 0;
static int last_status = 0;
static int last_reaped = 0;
int
pexecute (program, argv, this_pname, temp_base, errmsg_fmt, errmsg_arg, flags)
const char *program;
char * const *argv;
const char *this_pname;
const char *temp_base;
char **errmsg_fmt, **errmsg_arg;
int flags;
{
int rc;
last_pid++;
if (last_pid < 0)
last_pid = 1;
if ((flags & PEXECUTE_ONE) != PEXECUTE_ONE)
abort ();
#ifdef __DJGPP__
/* ??? What are the possible return values from spawnv? */
rc = (flags & PEXECUTE_SEARCH ? spawnvp : spawnv) (P_WAIT, program, argv);
#else
char *scmd, *rf;
FILE *argfile;
int i, el = flags & PEXECUTE_SEARCH ? 4 : 0;
if (temp_base == 0)
temp_base = choose_temp_base ();
scmd = (char *) xmalloc (strlen (program) + strlen (temp_base) + 6 + el);
rf = scmd + strlen(program) + 2 + el;
sprintf (scmd, "%s%s @%s.gp", program,
(flags & PEXECUTE_SEARCH ? ".exe" : ""), temp_base);
argfile = fopen (rf, "w");
if (argfile == 0)
{
int errno_save = errno;
free (scmd);
errno = errno_save;
*errmsg_fmt = "cannot open `%s.gp'";
*errmsg_arg = temp_base;
return -1;
}
for (i=1; argv[i]; i++)
{
char *cp;
for (cp = argv[i]; *cp; cp++)
{
if (*cp == '"' || *cp == '\'' || *cp == '\\' || ISSPACE (*cp))
fputc ('\\', argfile);
fputc (*cp, argfile);
}
fputc ('\n', argfile);
}
fclose (argfile);
rc = system (scmd);
{
int errno_save = errno;
remove (rf);
free (scmd);
errno = errno_save;
}
#endif
if (rc == -1)
{
*errmsg_fmt = install_error_msg;
*errmsg_arg = (char *)program;
return -1;
}
/* Tuck the status away for pwait, and return a "pid". */
last_status = rc << 8;
return last_pid;
}
/* Use ECHILD if available, otherwise use EINVAL. */
#ifdef ECHILD
#define PWAIT_ERROR ECHILD
#else
#define PWAIT_ERROR EINVAL
#endif
int
pwait (pid, status, flags)
int pid;
int *status;
int flags;
{
/* On MSDOS each pexecute must be followed by it's associated pwait. */
if (pid != last_pid
/* Called twice for the same child? */
|| pid == last_reaped)
{
errno = PWAIT_ERROR;
return -1;
}
/* ??? Here's an opportunity to canonicalize the values in STATUS.
Needed? */
#ifdef __DJGPP__
*status = (last_status >> 8);
#else
*status = last_status;
#endif
last_reaped = last_pid;
return last_pid;
}
#endif /* MSDOS */
#if defined (_WIN32) && ! defined (_UWIN)
#include <process.h>
#ifdef __CYGWIN__
#define fix_argv(argvec) (argvec)
extern int _spawnv ();
extern int _spawnvp ();
#else /* ! __CYGWIN__ */
/* This is a kludge to get around the Microsoft C spawn functions' propensity
to remove the outermost set of double quotes from all arguments. */
static const char * const *
fix_argv (argvec)
char **argvec;
{
int i;
for (i = 1; argvec[i] != 0; i++)
{
int len, j;
char *temp, *newtemp;
temp = argvec[i];
len = strlen (temp);
for (j = 0; j < len; j++)
{
if (temp[j] == '"')
{
newtemp = xmalloc (len + 2);
strncpy (newtemp, temp, j);
newtemp [j] = '\\';
strncpy (&newtemp [j+1], &temp [j], len-j);
newtemp [len+1] = 0;
temp = newtemp;
len++;
j++;
}
}
argvec[i] = temp;
}
for (i = 0; argvec[i] != 0; i++)
{
if (strpbrk (argvec[i], " \t"))
{
int len, trailing_backslash;
char *temp;
len = strlen (argvec[i]);
trailing_backslash = 0;
/* There is an added complication when an arg with embedded white
space ends in a backslash (such as in the case of -iprefix arg
passed to cpp). The resulting quoted strings gets misinterpreted
by the command interpreter -- it thinks that the ending quote
is escaped by the trailing backslash and things get confused.
We handle this case by escaping the trailing backslash, provided
it was not escaped in the first place. */
if (len > 1
&& argvec[i][len-1] == '\\'
&& argvec[i][len-2] != '\\')
{
trailing_backslash = 1;
++len; /* to escape the final backslash. */
}
len += 2; /* and for the enclosing quotes. */
temp = xmalloc (len + 1);
temp[0] = '"';
strcpy (temp + 1, argvec[i]);
if (trailing_backslash)
temp[len-2] = '\\';
temp[len-1] = '"';
temp[len] = '\0';
argvec[i] = temp;
}
}
return (const char * const *) argvec;
}
#endif /* __CYGWIN__ */
#include <io.h>
#include <fcntl.h>
#include <signal.h>
/* mingw32 headers may not define the following. */
#ifndef _P_WAIT
# define _P_WAIT 0
# define _P_NOWAIT 1
# define _P_OVERLAY 2
# define _P_NOWAITO 3
# define _P_DETACH 4
# define WAIT_CHILD 0
# define WAIT_GRANDCHILD 1
#endif
/* Win32 supports pipes */
int
pexecute (program, argv, this_pname, temp_base, errmsg_fmt, errmsg_arg, flags)
const char *program;
char * const *argv;
const char *this_pname;
const char *temp_base;
char **errmsg_fmt, **errmsg_arg;
int flags;
{
int pid;
int pdes[2], org_stdin, org_stdout;
int input_desc, output_desc;
int retries, sleep_interval;
/* Pipe waiting from last process, to be used as input for the next one.
Value is STDIN_FILE_NO if no pipe is waiting
(i.e. the next command is the first of a group). */
static int last_pipe_input;
/* If this is the first process, initialize. */
if (flags & PEXECUTE_FIRST)
last_pipe_input = STDIN_FILE_NO;
input_desc = last_pipe_input;
/* If this isn't the last process, make a pipe for its output,
and record it as waiting to be the input to the next process. */
if (! (flags & PEXECUTE_LAST))
{
if (_pipe (pdes, 256, O_BINARY) < 0)
{
*errmsg_fmt = "pipe";
*errmsg_arg = NULL;
return -1;
}
output_desc = pdes[WRITE_PORT];
last_pipe_input = pdes[READ_PORT];
}
else
{
/* Last process. */
output_desc = STDOUT_FILE_NO;
last_pipe_input = STDIN_FILE_NO;
}
if (input_desc != STDIN_FILE_NO)
{
org_stdin = dup (STDIN_FILE_NO);
dup2 (input_desc, STDIN_FILE_NO);
close (input_desc);
}
if (output_desc != STDOUT_FILE_NO)
{
org_stdout = dup (STDOUT_FILE_NO);
dup2 (output_desc, STDOUT_FILE_NO);
close (output_desc);
}
pid = (flags & PEXECUTE_SEARCH ? _spawnvp : _spawnv)
(_P_NOWAIT, program, fix_argv(argv));
if (input_desc != STDIN_FILE_NO)
{
dup2 (org_stdin, STDIN_FILE_NO);
close (org_stdin);
}
if (output_desc != STDOUT_FILE_NO)
{
dup2 (org_stdout, STDOUT_FILE_NO);
close (org_stdout);
}
if (pid == -1)
{
*errmsg_fmt = install_error_msg;
*errmsg_arg = program;
return -1;
}
return pid;
}
/* MS CRTDLL doesn't return enough information in status to decide if the
child exited due to a signal or not, rather it simply returns an
integer with the exit code of the child; eg., if the child exited with
an abort() call and didn't have a handler for SIGABRT, it simply returns
with status = 3. We fix the status code to conform to the usual WIF*
macros. Note that WIFSIGNALED will never be true under CRTDLL. */
int
pwait (pid, status, flags)
int pid;
int *status;
int flags;
{
#ifdef __CYGWIN__
return wait (status);
#else
int termstat;
pid = _cwait (&termstat, pid, WAIT_CHILD);
/* ??? Here's an opportunity to canonicalize the values in STATUS.
Needed? */
/* cwait returns the child process exit code in termstat.
A value of 3 indicates that the child caught a signal, but not
which one. Since only SIGABRT, SIGFPE and SIGINT do anything, we
report SIGABRT. */
if (termstat == 3)
*status = SIGABRT;
else
*status = (((termstat) & 0xff) << 8);
return pid;
#endif /* __CYGWIN__ */
}
#endif /* _WIN32 && ! _UWIN */
#ifdef OS2
/* ??? Does OS2 have process.h? */
extern int spawnv ();
extern int spawnvp ();
int
pexecute (program, argv, this_pname, temp_base, errmsg_fmt, errmsg_arg, flags)
const char *program;
char * const *argv;
const char *this_pname;
const char *temp_base;
char **errmsg_fmt, **errmsg_arg;
int flags;
{
int pid;
if ((flags & PEXECUTE_ONE) != PEXECUTE_ONE)
abort ();
/* ??? Presumably 1 == _P_NOWAIT. */
pid = (flags & PEXECUTE_SEARCH ? spawnvp : spawnv) (1, program, argv);
if (pid == -1)
{
*errmsg_fmt = install_error_msg;
*errmsg_arg = program;
return -1;
}
return pid;
}
int
pwait (pid, status, flags)
int pid;
int *status;
int flags;
{
/* ??? Here's an opportunity to canonicalize the values in STATUS.
Needed? */
int pid = wait (status);
return pid;
}
#endif /* OS2 */
#ifdef MPW
/* MPW pexecute doesn't actually run anything; instead, it writes out
script commands that, when run, will do the actual executing.
For example, in GCC's case, GCC will write out several script commands:
cpp ...
cc1 ...
as ...
ld ...
and then exit. None of the above programs will have run yet. The task
that called GCC will then execute the script and cause cpp,etc. to run.
The caller must invoke pfinish before calling exit. This adds
the finishing touches to the generated script. */
static int first_time = 1;
int
pexecute (program, argv, this_pname, temp_base, errmsg_fmt, errmsg_arg, flags)
const char *program;
char * const *argv;
const char *this_pname;
const char *temp_base;
char **errmsg_fmt, **errmsg_arg;
int flags;
{
char tmpprogram[255];
char *cp, *tmpname;
int i;
mpwify_filename (program, tmpprogram);
if (first_time)
{
printf ("Set Failed 0\n");
first_time = 0;
}
fputs ("If {Failed} == 0\n", stdout);
/* If being verbose, output a copy of the command. It should be
accurate enough and escaped enough to be "clickable". */
if (flags & PEXECUTE_VERBOSE)
{
fputs ("\tEcho ", stdout);
fputc ('\'', stdout);
fputs (tmpprogram, stdout);
fputc ('\'', stdout);
fputc (' ', stdout);
for (i=1; argv[i]; i++)
{
fputc ('\'', stdout);
/* See if we have an argument that needs fixing. */
if (strchr(argv[i], '/'))
{
tmpname = (char *) xmalloc (256);
mpwify_filename (argv[i], tmpname);
argv[i] = tmpname;
}
for (cp = argv[i]; *cp; cp++)
{
/* Write an Option-d escape char in front of special chars. */
if (strchr("'+", *cp))
fputc ('\266', stdout);
fputc (*cp, stdout);
}
fputc ('\'', stdout);
fputc (' ', stdout);
}
fputs ("\n", stdout);
}
fputs ("\t", stdout);
fputs (tmpprogram, stdout);
fputc (' ', stdout);
for (i=1; argv[i]; i++)
{
/* See if we have an argument that needs fixing. */
if (strchr(argv[i], '/'))
{
tmpname = (char *) xmalloc (256);
mpwify_filename (argv[i], tmpname);
argv[i] = tmpname;
}
if (strchr (argv[i], ' '))
fputc ('\'', stdout);
for (cp = argv[i]; *cp; cp++)
{
/* Write an Option-d escape char in front of special chars. */
if (strchr("'+", *cp))
fputc ('\266', stdout);
fputc (*cp, stdout);
}
if (strchr (argv[i], ' '))
fputc ('\'', stdout);
fputc (' ', stdout);
}
fputs ("\n", stdout);
/* Output commands that arrange to clean up and exit if a failure occurs.
We have to be careful to collect the status from the program that was
run, rather than some other script command. Also, we don't exit
immediately, since necessary cleanups are at the end of the script. */
fputs ("\tSet TmpStatus {Status}\n", stdout);
fputs ("\tIf {TmpStatus} != 0\n", stdout);
fputs ("\t\tSet Failed {TmpStatus}\n", stdout);
fputs ("\tEnd\n", stdout);
fputs ("End\n", stdout);
/* We're just composing a script, can't fail here. */
return 0;
}
int
pwait (pid, status, flags)
int pid;
int *status;
int flags;
{
*status = 0;
return 0;
}
/* Write out commands that will exit with the correct error code
if something in the script failed. */
void
pfinish ()
{
printf ("\tExit \"{Failed}\"\n");
}
#endif /* MPW */
/* include for Unix-like environments but not for Dos-like environments */
#if ! defined (__MSDOS__) && ! defined (OS2) && ! defined (MPW) \
&& ! (defined (_WIN32) && ! defined (_UWIN))
extern int execv ();
extern int execvp ();
int
pexecute (program, argv, this_pname, temp_base, errmsg_fmt, errmsg_arg, flags)
const char *program;
char * const *argv;
const char *this_pname;
const char *temp_base ATTRIBUTE_UNUSED;
char **errmsg_fmt, **errmsg_arg;
int flags;
{
int (*func)() = (flags & PEXECUTE_SEARCH ? execvp : execv);
int pid;
int pdes[2];
int input_desc, output_desc;
int retries, sleep_interval;
/* Pipe waiting from last process, to be used as input for the next one.
Value is STDIN_FILE_NO if no pipe is waiting
(i.e. the next command is the first of a group). */
static int last_pipe_input;
/* If this is the first process, initialize. */
if (flags & PEXECUTE_FIRST)
last_pipe_input = STDIN_FILE_NO;
input_desc = last_pipe_input;
/* If this isn't the last process, make a pipe for its output,
and record it as waiting to be the input to the next process. */
if (! (flags & PEXECUTE_LAST))
{
if (pipe (pdes) < 0)
{
*errmsg_fmt = "pipe";
*errmsg_arg = NULL;
return -1;
}
output_desc = pdes[WRITE_PORT];
last_pipe_input = pdes[READ_PORT];
}
else
{
/* Last process. */
output_desc = STDOUT_FILE_NO;
last_pipe_input = STDIN_FILE_NO;
}
/* Fork a subprocess; wait and retry if it fails. */
sleep_interval = 1;
pid = -1;
for (retries = 0; retries < 4; retries++)
{
pid = fork ();
if (pid >= 0)
break;
sleep (sleep_interval);
sleep_interval *= 2;
}
switch (pid)
{
case -1:
*errmsg_fmt = "fork";
*errmsg_arg = NULL;
return -1;
case 0: /* child */
/* Move the input and output pipes into place, if necessary. */
if (input_desc != STDIN_FILE_NO)
{
close (STDIN_FILE_NO);
dup (input_desc);
close (input_desc);
}
if (output_desc != STDOUT_FILE_NO)
{
close (STDOUT_FILE_NO);
dup (output_desc);
close (output_desc);
}
/* Close the parent's descs that aren't wanted here. */
if (last_pipe_input != STDIN_FILE_NO)
close (last_pipe_input);
/* Exec the program. */
(*func) (program, argv);
fprintf (stderr, "%s: ", this_pname);
fprintf (stderr, install_error_msg, program);
fprintf (stderr, ": %s\n", xstrerror (errno));
exit (-1);
/* NOTREACHED */
return 0;
default:
/* In the parent, after forking.
Close the descriptors that we made for this child. */
if (input_desc != STDIN_FILE_NO)
close (input_desc);
if (output_desc != STDOUT_FILE_NO)
close (output_desc);
/* Return child's process number. */
return pid;
}
}
int
pwait (pid, status, flags)
int pid;
int *status;
int flags ATTRIBUTE_UNUSED;
{
/* ??? Here's an opportunity to canonicalize the values in STATUS.
Needed? */
#ifdef VMS
pid = waitpid (-1, status, 0);
#else
pid = wait (status);
#endif
return pid;
}
#endif /* ! __MSDOS__ && ! OS2 && ! MPW && ! (_WIN32 && ! _UWIN) */

63
libiberty/pexecute.txh Normal file
View File

@ -0,0 +1,63 @@
@deftypefn Extension int pexecute (const char *@var{program}, char * const *@var{argv}, const char *@var{this_pname}, const char *@var{temp_base}, char **@var{errmsg_fmt}, char **@var{errmsg_arg}, int flags)
Executes a program.
@var{program} and @var{argv} are the arguments to
@code{execv}/@code{execvp}.
@var{this_pname} is name of the calling program (i.e., @code{argv[0]}).
@var{temp_base} is the path name, sans suffix, of a temporary file to
use if needed. This is currently only needed for MS-DOS ports that
don't use @code{go32} (do any still exist?). Ports that don't need it
can pass @code{NULL}.
(@code{@var{flags} & PEXECUTE_SEARCH}) is non-zero if @env{PATH}
should be searched (??? It's not clear that GCC passes this flag
correctly). (@code{@var{flags} & PEXECUTE_FIRST}) is nonzero for the
first process in chain. (@code{@var{flags} & PEXECUTE_FIRST}) is
nonzero for the last process in chain. The first/last flags could be
simplified to only mark the last of a chain of processes but that
requires the caller to always mark the last one (and not give up
early if some error occurs). It's more robust to require the caller
to mark both ends of the chain.
The result is the pid on systems like Unix where we
@code{fork}/@code{exec} and on systems like WIN32 and OS/2 where we
use @code{spawn}. It is up to the caller to wait for the child.
The result is the @code{WEXITSTATUS} on systems like MS-DOS where we
@code{spawn} and wait for the child here.
Upon failure, @var{errmsg_fmt} and @var{errmsg_arg} are set to the
text of the error message with an optional argument (if not needed,
@var{errmsg_arg} is set to @code{NULL}), and @minus{}1 is returned.
@code{errno} is available to the caller to use.
@end deftypefn
@deftypefn Extension int pwait (int @var{pid}, int *@var{status}, int @var{flags})
Waits for a program started by @code{pexecute} to finish.
@var{pid} is the process id of the task to wait for. @var{status} is
the `status' argument to wait. @var{flags} is currently unused
(allows future enhancement without breaking upward compatibility).
Pass 0 for now.
The result is the pid of the child reaped, or -1 for failure
(@code{errno} says why).
On systems that don't support waiting for a particular child,
@var{pid} is ignored. On systems like MS-DOS that don't really
multitask @code{pwait} is just a mechanism to provide a consistent
interface for the caller.
@end deftypefn
@undocumented pfinish
pfinish: finish generation of script
pfinish is necessary for systems like MPW where a script is generated
that runs the requested programs.