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authorIan Lance Taylor <ian@airs.com>2005-03-29 02:15:24 +0000
committerIan Lance Taylor <ian@airs.com>2005-03-29 02:15:24 +0000
commitb109e79adcb0d7e31737de397f97fa41d1d4e528 (patch)
treea736649abb8979bed53a6148d8360dbaf90ef9b5 /libiberty/pexecute.c
parent3d0dfe269d9f4b46ab3f0d07c026ae3fccf4338a (diff)
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libiberty:
* pex-common.c: New file. * pex-one.c: New file. * pexecute.c: New file. * pex-common.h: Include <stdio.h>. (struct pex_obj): Define. (struct pex_funcs): Define. (pex_init_common): Declare. * pex-unix.c: Rewrite. * pex-win32.c: Rewrite. * pex-djgpp.c: Rewrite. * pex-msdos.c: Rewrite. * testsuite/text-pexecute.c: New file. * pexecute.txh: Rewrite. * configure.ac: Check for wait3 and wait4. Set CHECK to really-check rather than check-cplus-dem. * functions.texi: Rebuild. * Makefile.in: Rebuild dependencies. (CFILES): Add pexecute.c, pex-common.c, pex-one.c. (REQUIRED_OFILES): Add pexecute.o, pex-common.o, pex-one.o. * testsuite/Makefile.in (really-check): New target. (check-pexecute, test-pexecute): New targets. * configure: Rebuild. include: * libiberty.h: Include <stdio.h>. (PEX_RECORD_TIMES, PEX_USE_PIPES, PEX_SAVE_TEMPS): Define. (PEX_LAST, PEX_SEARCH, PEX_SUFFIX, PEX_STDERR_TO_STDOUT): Define. (PEX_BINARY_INPUT, PEX_BINARY_OUTPUT): Define. (pex_init, pex_run, pex_read_output): Declare. (pex_get_status, pex_get_times, pex_free, pex_one): Declare. (struct pex_time): Define.
Diffstat (limited to 'libiberty/pexecute.c')
-rw-r--r--libiberty/pexecute.c121
1 files changed, 121 insertions, 0 deletions
diff --git a/libiberty/pexecute.c b/libiberty/pexecute.c
new file mode 100644
index 0000000..df06110
--- /dev/null
+++ b/libiberty/pexecute.c
@@ -0,0 +1,121 @@
+/* Utilities to execute a program in a subprocess (possibly linked by pipes
+ with other subprocesses), and wait for it.
+ Copyright (C) 2004 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. */
+
+/* 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 = "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 = "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;
+
+ vector = xmalloc (idx * sizeof (int));
+ if (!pex_get_status (pex, idx, 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;
+}