bacb96b24f
2003-07-02 Danny Smith <dannysmith@users.source.forge.net> * pex-win32.c (fix_argv): Ensure that the executable pathname uses Win32 backslashes. (pexecute): Cast away constness when assigning *errmsg_arg. From-SVN: r68862
250 lines
6.5 KiB
C
250 lines
6.5 KiB
C
/* 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;
|
|
char * command0 = argvec[0];
|
|
|
|
/* Ensure that the executable pathname uses Win32 backslashes. */
|
|
for (; *command0 != '\0'; command0++)
|
|
if (*command0 == '/')
|
|
*command0 = '\\';
|
|
|
|
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 = (char*) 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;
|
|
}
|