[thirdparty/gcc.git] / libiberty / pex-win32.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;

  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;
}
Commit	Line	Data
55d0e5e0 ZW	1	/* Utilities to execute a program in a subprocess (possibly linked by pipes
	2	with other subprocesses), and wait for it. Generic Win32 specialization.
	3	Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2003
	4	Free Software Foundation, Inc.
	5
	6	This file is part of the libiberty library.
	7	Libiberty is free software; you can redistribute it and/or
	8	modify it under the terms of the GNU Library General Public
	9	License as published by the Free Software Foundation; either
	10	version 2 of the License, or (at your option) any later version.
	11
	12	Libiberty is distributed in the hope that it will be useful,
	13	but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	15	Library General Public License for more details.
	16
	17	You should have received a copy of the GNU Library General Public
	18	License along with libiberty; see the file COPYING.LIB. If not,
	19	write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
	20	Boston, MA 02111-1307, USA. */
	21
	22	#include "pex-common.h"
	23
	24	#ifdef HAVE_STRING_H
	25	#include <string.h>
	26	#endif
	27	#ifdef HAVE_UNISTD_H
	28	#include <unistd.h>
	29	#endif
	30	#ifdef HAVE_SYS_WAIT_H
	31	#include <sys/wait.h>
	32	#endif
	33
	34	#include <process.h>
	35	#include <io.h>
	36	#include <fcntl.h>
	37	#include <signal.h>
	38
	39	/* mingw32 headers may not define the following. */
	40
	41	#ifndef _P_WAIT
	42	# define _P_WAIT 0
	43	# define _P_NOWAIT 1
	44	# define _P_OVERLAY 2
	45	# define _P_NOWAITO 3
	46	# define _P_DETACH 4
	47
	48	# define WAIT_CHILD 0
	49	# define WAIT_GRANDCHILD 1
	50	#endif
	51
	52	/* This is a kludge to get around the Microsoft C spawn functions' propensity
	53	to remove the outermost set of double quotes from all arguments. */
	54
	55	static const char * const *
	56	fix_argv (argvec)
	57	char **argvec;
	58	{
	59	int i;
	60
	61	for (i = 1; argvec[i] != 0; i++)
	62	{
	63	int len, j;
	64	char temp, newtemp;
65
66	temp = argvec[i];
67	len = strlen (temp);
68	for (j = 0; j < len; j++)
69	{
70	if (temp[j] == '"')
71	{
72	newtemp = xmalloc (len + 2);
73	strncpy (newtemp, temp, j);
74	newtemp [j] = '\\';
75	strncpy (&newtemp [j+1], &temp [j], len-j);
76	newtemp [len+1] = 0;
77	temp = newtemp;
78	len++;
79	j++;
80	}
81	}
82
83	argvec[i] = temp;
84	}
85
86	for (i = 0; argvec[i] != 0; i++)
87	{
88	if (strpbrk (argvec[i], " \t"))
89	{
90	int len, trailing_backslash;
91	char *temp;
92
93	len = strlen (argvec[i]);
94	trailing_backslash = 0;
95
96	/* There is an added complication when an arg with embedded white
97	space ends in a backslash (such as in the case of -iprefix arg
98	passed to cpp). The resulting quoted strings gets misinterpreted
99	by the command interpreter -- it thinks that the ending quote
100	is escaped by the trailing backslash and things get confused.
101	We handle this case by escaping the trailing backslash, provided
102	it was not escaped in the first place. */
103	if (len > 1
104	&& argvec[i][len-1] == '\\'
105	&& argvec[i][len-2] != '\\')
106	{
107	trailing_backslash = 1;
108	++len; /* to escape the final backslash. */
109	}
110
111	len += 2; /* and for the enclosing quotes. */
112
113	temp = xmalloc (len + 1);
114	temp[0] = '"';
115	strcpy (temp + 1, argvec[i]);
116	if (trailing_backslash)
117	temp[len-2] = '\\';
118	temp[len-1] = '"';
119	temp[len] = '\0';
120
121	argvec[i] = temp;
122	}
123	}
124
125	return (const char * const *) argvec;
126	}
127
128	/* Win32 supports pipes */
129	int
130	pexecute (program, argv, this_pname, temp_base, errmsg_fmt, errmsg_arg, flags)
131	const char *program;
132	char * const *argv;
133	const char *this_pname;
134	const char *temp_base;
135	char errmsg_fmt, errmsg_arg;
136	int flags;
137	{
138	int pid;
139	int pdes[2], org_stdin, org_stdout;
140	int input_desc, output_desc;
141	int retries, sleep_interval;
142
143	/* Pipe waiting from last process, to be used as input for the next one.
144	Value is STDIN_FILE_NO if no pipe is waiting
145	(i.e. the next command is the first of a group). */
146	static int last_pipe_input;
147
148	/* If this is the first process, initialize. */
149	if (flags & PEXECUTE_FIRST)
150	last_pipe_input = STDIN_FILE_NO;
151
152	input_desc = last_pipe_input;
153
154	/* If this isn't the last process, make a pipe for its output,
155	and record it as waiting to be the input to the next process. */
156	if (! (flags & PEXECUTE_LAST))
157	{
158	if (_pipe (pdes, 256, O_BINARY) < 0)
159	{
160	*errmsg_fmt = "pipe";
161	*errmsg_arg = NULL;
162	return -1;
163	}
164	output_desc = pdes[WRITE_PORT];
165	last_pipe_input = pdes[READ_PORT];
166	}
167	else
168	{
169	/* Last process. */
170	output_desc = STDOUT_FILE_NO;
171	last_pipe_input = STDIN_FILE_NO;
172	}
173
174	if (input_desc != STDIN_FILE_NO)
175	{
176	org_stdin = dup (STDIN_FILE_NO);
177	dup2 (input_desc, STDIN_FILE_NO);
178	close (input_desc);
179	}
180
181	if (output_desc != STDOUT_FILE_NO)
182	{
183	org_stdout = dup (STDOUT_FILE_NO);
184	dup2 (output_desc, STDOUT_FILE_NO);
185	close (output_desc);
186	}
187
188	pid = (flags & PEXECUTE_SEARCH ? _spawnvp : _spawnv)
189	(_P_NOWAIT, program, fix_argv(argv));
190
191	if (input_desc != STDIN_FILE_NO)
192	{
193	dup2 (org_stdin, STDIN_FILE_NO);
194	close (org_stdin);
195	}
196
197	if (output_desc != STDOUT_FILE_NO)
198	{
199	dup2 (org_stdout, STDOUT_FILE_NO);
200	close (org_stdout);
201	}
202
203	if (pid == -1)
204	{
205	*errmsg_fmt = install_error_msg;
206	*errmsg_arg = program;
207	return -1;
208	}
209
210	return pid;
211	}
212
213	/* MS CRTDLL doesn't return enough information in status to decide if the
214	child exited due to a signal or not, rather it simply returns an
215	integer with the exit code of the child; eg., if the child exited with
216	an abort() call and didn't have a handler for SIGABRT, it simply returns
217	with status = 3. We fix the status code to conform to the usual WIF*
218	macros. Note that WIFSIGNALED will never be true under CRTDLL. */
219
220	int
221	pwait (pid, status, flags)
222	int pid;
223	int *status;
224	int flags;
225	{
226	int termstat;
227
228	pid = _cwait (&termstat, pid, WAIT_CHILD);
229
230	/* ??? Here's an opportunity to canonicalize the values in STATUS.
231	Needed? */
232
233	/* cwait returns the child process exit code in termstat.
234	A value of 3 indicates that the child caught a signal, but not
235	which one. Since only SIGABRT, SIGFPE and SIGINT do anything, we
236	report SIGABRT. */
237	if (termstat == 3)
238	*status = SIGABRT;
239	else
240	*status = (((termstat) & 0xff) << 8);
241
242	return pid;
243	}