gcc/libiberty/pexecute.c

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/* Utilities to execute a program in a subprocess (possibly linked by pipes
with other subprocesses), and wait for it.
2022-01-03 10:42:10 +01:00
Copyright (C) 2004-2022 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., 51 Franklin Street - Fifth Floor,
Boston, MA 02110-1301, USA. */
/* pexecute is an old routine. This implementation uses the newer
pex_init/pex_run/pex_get_status/pex_free routines. Don't use
pexecute in new code. Use the newer routines instead. */
#include "config.h"
#include "libiberty.h"
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
/* We only permit a single pexecute chain to execute at a time. This
was always true anyhow, though it wasn't documented. */
static struct pex_obj *pex;
static int idx;
int
pexecute (const char *program, char * const *argv, const char *pname,
const char *temp_base, char **errmsg_fmt, char **errmsg_arg,
int flags)
{
const char *errmsg;
int err;
if ((flags & PEXECUTE_FIRST) != 0)
{
if (pex != NULL)
{
*errmsg_fmt = (char *) "pexecute already in progress";
*errmsg_arg = NULL;
return -1;
}
pex = pex_init (PEX_USE_PIPES, pname, temp_base);
idx = 0;
}
else
{
if (pex == NULL)
{
*errmsg_fmt = (char *) "pexecute not in progress";
*errmsg_arg = NULL;
return -1;
}
}
errmsg = pex_run (pex,
(((flags & PEXECUTE_LAST) != 0 ? PEX_LAST : 0)
| ((flags & PEXECUTE_SEARCH) != 0 ? PEX_SEARCH : 0)),
program, argv, NULL, NULL, &err);
if (errmsg != NULL)
{
*errmsg_fmt = (char *) errmsg;
*errmsg_arg = NULL;
return -1;
}
/* Instead of a PID, we just return a one-based index into the
status values. We avoid zero just because the old pexecute would
never return it. */
return ++idx;
}
int
pwait (int pid, int *status, int flags ATTRIBUTE_UNUSED)
{
/* The PID returned by pexecute is one-based. */
--pid;
if (pex == NULL || pid < 0 || pid >= idx)
return -1;
if (pid == 0 && idx == 1)
{
if (!pex_get_status (pex, 1, status))
return -1;
}
else
{
int *vector;
libiberty.h (ACONCAT): Properly cast value of alloca(). include/ 2005-05-24 Gabriel Dos Reis <gdr@integrable-solutions.net> * libiberty.h (ACONCAT): Properly cast value of alloca(). * ansidecl.h (ATTRIBUTE_UNUSED_LABEL): Don't define if __cplusplus. libiberty/ 2005-05-24 Gabriel Dos Reis <gdr@integrable-solutions.net> * configure.ac: Check declarations for calloc(), getenv(), malloc(), realloc() and sbrk(). * config.in: Regenerate. * configure: Likewise. * alloca.c (C_alloca): Change "new" to "new_storage". Use XNEWVEC instead of xmalloc. * choose-temp.c (choose_temp_base): Use XNEWVEC instea od xmalloc. * concat.c (liiberty_concat_ptr): Surround definition with an extern "C" block, if __cplusplus. (concat): Use XNEWVEC instead of xmalloc. (reconcat): Likewise. * cp-demangle.c (struct d_print_template): Rename member "template" to "template_decl". Adjust use throughout the file. (d_print_resize): Properly cast return value of realloc(). (cplus_demangle_print): Same for malloc(). (d_demangle): Likewise. * cp-demint.c (cplus_demangle_fill_builtin_type): Rename parameter "typename" to "type_name". * cplus-dem.c (grow_vect): Use XRESIZEVEC instead of xrealloc(). (work_stuff_copy_to_from): Use XNEWVEC insteand of xmalloc(). (demangle_template_value_parm): Likewise. (demangle_template): Likewise. (recursively_demangle): Likewise. (do_hpacc_template_literal): Likewise. (do_arg): Likewise. (remember_type): Likewise. (remember_Ktype): Likewise. (register_Btype): Likewise. (string_need): Use XRESIZEVEC instead of xrealloc(). * dyn-string.c (dyn_string_init): Use XNEWVEC. (dyn_string_new): Use XNEW. (dyn_string_resize): Use XRESIZEVEC. * fnmatch.c (fnmatch): Rename local variable "not" to "negate". * getopt.c (getenv): Declare only if !__cplusplus and !getenv. Otherwise include <stdlib.h>. (exchange): Cast return value of malloc(). * hashtab.c (htab_size): Define as both macro and non-inline function. (htab_elements): Likewise. * getpwd.c (getpwd): Use XNEWVEC. (htab_create_alloc_ex): Use C90 prototype-style. * lrealpath.c (lrealpath): Appropriately cast return value of malloc(). * make-relative-prefix.c (save_string): Likewise. * make-temp-file.c (try_dir): Rename from "try". Adjust use in the file. (choose_tmpdir): Use XNEWVEC. * mkstemps.c (mkstemps): Rename parameter "template" to "pattern". * pex-common.c (pex_init_common): Use XNEW. (pex_add_remove): Use XRESIZEVEC. (pex_run): Likewise. (pex_get_status_and_time): Likewise. * pex-djgpp.c (pex_djgpp_exec_child): Likewise. * pex-msdos.c (pex_init): Use XNEW. (pex_msdos_exec_child): Likewise. (pex_msdos_exec_child): Use XRESIZEVEC. * pex-unix.c (pex_wait): Use XNEW. * pex-win32.c (fix_argv): Use XNEWVEC. * pexecute.c (pwait): Likewise. * setenv.c (setenv): Properly cast return value of malloc(). * sigsetmask.c (sigsetmask): Rename local variables "old" and "new" to "old_sig" and "new_sig". * sort.c (main): Use XNEWVEC. * spaces.c (spaces): Cast return value of malloc(). * strndup.c (strndup): Likewise. * ternary.c (ternary_insert): Use XNEW. * xmalloc.c (malloc, realloc, calloc, sbrk): Surround declaration with an extern "C" block if __cplusplus. * xstrdup.c (xstrdup): Cast return value of memcpy(). * xstrerror.c (strerror): Enclose declaration in an extern "C" block if __cplusplus. * xstrndup.c (xstrndup): Use XNEW. Cast return value of memcpy(). From-SVN: r100115
2005-05-24 22:48:25 +02:00
vector = XNEWVEC (int, idx);
if (!pex_get_status (pex, idx, vector))
{
free (vector);
return -1;
}
*status = vector[pid];
free (vector);
}
/* Assume that we are done after the caller has retrieved the last
exit status. The original implementation did not require that
the exit statuses be retrieved in order, but this implementation
does. */
if (pid + 1 == idx)
{
pex_free (pex);
pex = NULL;
idx = 0;
}
return pid + 1;
}