1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
|
/* 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;
}
|
