1 /* Utilities to execute a program in a subprocess (possibly linked by pipes
2 with other subprocesses), and wait for it. DJGPP specialization.
3 Copyright (C) 1996-2018 Free Software Foundation, Inc.
5 This file is part of the libiberty library.
6 Libiberty is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Library General Public
8 License as published by the Free Software Foundation; either
9 version 2 of the License, or (at your option) any later version.
11 Libiberty is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Library General Public License for more details.
16 You should have received a copy of the GNU Library General Public
17 License along with libiberty; see the file COPYING.LIB. If not,
18 write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
19 Boston, MA 02110-1301, USA. */
21 #include "pex-common.h"
25 #ifdef NEED_DECLARATION_ERRNO
37 /* Use ECHILD if available, otherwise use EINVAL. */
39 #define PWAIT_ERROR ECHILD
41 #define PWAIT_ERROR EINVAL
44 static int pex_djgpp_open_read (struct pex_obj
*, const char *, int);
45 static int pex_djgpp_open_write (struct pex_obj
*, const char *, int, int);
46 static pid_t
pex_djgpp_exec_child (struct pex_obj
*, int, const char *,
47 char * const *, char * const *,
49 const char **, int *);
50 static int pex_djgpp_close (struct pex_obj
*, int);
51 static pid_t
pex_djgpp_wait (struct pex_obj
*, pid_t
, int *, struct pex_time
*,
52 int, const char **, int *);
54 /* The list of functions we pass to the common routines. */
56 const struct pex_funcs funcs
=
69 /* Return a newly initialized pex_obj structure. */
72 pex_init (int flags
, const char *pname
, const char *tempbase
)
74 /* DJGPP does not support pipes. */
75 flags
&= ~ PEX_USE_PIPES
;
76 return pex_init_common (flags
, pname
, tempbase
, &funcs
);
79 /* Open a file for reading. */
82 pex_djgpp_open_read (struct pex_obj
*obj ATTRIBUTE_UNUSED
,
83 const char *name
, int binary
)
85 return open (name
, O_RDONLY
| (binary
? O_BINARY
: O_TEXT
));
88 /* Open a file for writing. */
91 pex_djgpp_open_write (struct pex_obj
*obj ATTRIBUTE_UNUSED
,
92 const char *name
, int binary
, int append
)
94 /* Note that we can't use O_EXCL here because gcc may have already
95 created the temporary file via make_temp_file. */
99 (O_WRONLY
| O_CREAT
| O_TRUNC
100 | (binary
? O_BINARY
: O_TEXT
)),
107 pex_djgpp_close (struct pex_obj
*obj ATTRIBUTE_UNUSED
, int fd
)
112 /* Execute a child. */
115 pex_djgpp_exec_child (struct pex_obj
*obj
, int flags
, const char *executable
,
116 char * const * argv
, char * const * env
,
117 int in
, int out
, int errdes
,
118 int toclose ATTRIBUTE_UNUSED
, const char **errmsg
,
121 int org_in
, org_out
, org_errdes
;
129 if (in
!= STDIN_FILE_NO
)
131 org_in
= dup (STDIN_FILE_NO
);
138 if (dup2 (in
, STDIN_FILE_NO
) < 0)
152 if (out
!= STDOUT_FILE_NO
)
154 org_out
= dup (STDOUT_FILE_NO
);
161 if (dup2 (out
, STDOUT_FILE_NO
) < 0)
175 if (errdes
!= STDERR_FILE_NO
176 || (flags
& PEX_STDERR_TO_STDOUT
) != 0)
178 org_errdes
= dup (STDERR_FILE_NO
);
185 if (dup2 ((flags
& PEX_STDERR_TO_STDOUT
) != 0 ? STDOUT_FILE_NO
: errdes
,
192 if (errdes
!= STDERR_FILE_NO
)
194 if (close (errdes
) < 0)
204 status
= (((flags
& PEX_SEARCH
) != 0 ? spawnvpe
: spawnve
)
205 (P_WAIT
, executable
, argv
, env
));
207 status
= (((flags
& PEX_SEARCH
) != 0 ? spawnvp
: spawnv
)
208 (P_WAIT
, executable
, argv
));
213 *errmsg
= ((flags
& PEX_SEARCH
) != 0) ? "spawnvp" : "spawnv";
216 if (in
!= STDIN_FILE_NO
)
218 if (dup2 (org_in
, STDIN_FILE_NO
) < 0)
224 if (close (org_in
) < 0)
232 if (out
!= STDOUT_FILE_NO
)
234 if (dup2 (org_out
, STDOUT_FILE_NO
) < 0)
240 if (close (org_out
) < 0)
248 if (errdes
!= STDERR_FILE_NO
249 || (flags
& PEX_STDERR_TO_STDOUT
) != 0)
251 if (dup2 (org_errdes
, STDERR_FILE_NO
) < 0)
257 if (close (org_errdes
) < 0)
265 /* Save the exit status for later. When we are called, obj->count
266 is the number of children which have executed before this
268 statuses
= (int *) obj
->sysdep
;
269 statuses
= XRESIZEVEC (int, statuses
, obj
->count
+ 1);
270 statuses
[obj
->count
] = status
;
271 obj
->sysdep
= (void *) statuses
;
273 return (pid_t
) obj
->count
;
276 /* Wait for a child process to complete. Actually the child process
277 has already completed, and we just need to return the exit
281 pex_djgpp_wait (struct pex_obj
*obj
, pid_t pid
, int *status
,
282 struct pex_time
*time
, int done ATTRIBUTE_UNUSED
,
283 const char **errmsg ATTRIBUTE_UNUSED
,
284 int *err ATTRIBUTE_UNUSED
)
289 memset (time
, 0, sizeof *time
);
291 statuses
= (int *) obj
->sysdep
;
292 *status
= statuses
[pid
];
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