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authorDJ Delorie <dj@redhat.com>2003-01-24 21:31:35 +0000
committerDJ Delorie <dj@redhat.com>2003-01-24 21:31:35 +0000
commit5a17353c6b7e9e380ec5e01f16352111ac09b621 (patch)
tree80cded7840779a7acf4e0fa7a8c47fcb223664c0 /libiberty/pex-win32.c
parent6c5977968d3f30224ac7ba84b5b852ed078c2117 (diff)
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merge from gcc
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diff --git a/libiberty/pex-win32.c b/libiberty/pex-win32.c
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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;
+}