1 /* Utilities to execute a program in a subprocess (possibly linked by pipes
2 with other subprocesses), and wait for it. Generic MSDOS specialization.
3 Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2003, 2005
4 Free Software Foundation, Inc.
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.
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.
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., 51 Franklin Street - Fifth Floor,
20 Boston, MA 02110-1301, USA. */
22 #include "pex-common.h"
26 #ifdef NEED_DECLARATION_ERRNO
36 #include "safe-ctype.h"
39 /* The structure we keep in obj->sysdep. */
41 #define PEX_MSDOS_FILE_COUNT 3
43 #define PEX_MSDOS_FD_OFFSET 10
47 /* An array of file names. We refer to these using file descriptors
48 of 10 + array index. */
49 const char *files
[PEX_MSDOS_FILE_COUNT
];
50 /* Exit statuses of programs which have been run. */
54 static int pex_msdos_open (struct pex_obj
*, const char *, int);
55 static int pex_msdos_open (struct pex_obj
*, const char *, int);
56 static int pex_msdos_fdindex (struct pex_msdos
*, int);
57 static long pex_msdos_exec_child (struct pex_obj
*, int, const char *,
58 char * const *, int, int, int,
59 const char **, int *);
60 static int pex_msdos_close (struct pex_obj
*, int);
61 static int pex_msdos_wait (struct pex_obj
*, long, int *, struct pex_time
*,
62 int, const char **, int *);
63 static void pex_msdos_cleanup (struct pex_obj
*);
65 /* The list of functions we pass to the common routines. */
67 const struct pex_funcs funcs
=
79 /* Return a newly initialized pex_obj structure. */
82 pex_init (int flags
, const char *pname
, const char *tempbase
)
87 /* MSDOS does not support pipes. */
88 flags
&= ~ PEX_USE_PIPES
;
90 ret
= pex_init_common (flags
, pname
, tempbase
, funcs
);
92 ret
->sysdep
= XNEW (struct pex_msdos
);
93 for (i
= 0; i
< PEX_MSDOS_FILE_COUNT
; ++i
)
100 /* Open a file. FIXME: We ignore the binary argument, since we have
101 no way to handle it. */
104 pex_msdos_open (struct pex_obj
*obj
, const char *name
,
105 int binary ATTRIBUTE_UNUSED
)
107 struct pex_msdos
*ms
;
110 ms
= (struct pex_msdos
*) obj
->sysdep
;
112 for (i
= 0; i
< PEX_MSDOS_FILE_COUNT
; ++i
)
114 if (ms
->files
[i
] == NULL
)
116 ms
->files
[i
] = xstrdup (name
);
117 return i
+ PEX_MSDOS_FD_OFFSET
;
124 /* Get the index into msdos->files associated with an open file
128 pex_msdos_fdindex (struct pex_msdos
*ms
, int fd
)
130 fd
-= PEX_MSDOS_FD_OFFSET
;
131 if (fd
< 0 || fd
>= PEX_MSDOS_FILE_COUNT
|| ms
->files
[fd
] == NULL
)
140 pex_msdos_close (struct pex_obj
*obj
, int fd
)
142 struct pex_msdos
*ms
;
145 ms
= (struct pex_msdos
*) obj
->sysdep
;
146 fdindex
= pe_msdos_fdindex (ms
, fd
);
147 free (ms
->files
[fdindex
]);
148 ms
->files
[fdindex
] = NULL
;
151 /* Execute a child. */
154 pex_msdos_exec_child (struct pex_obj
*obj
, int flags
, const char *executable
,
155 char * const * argv
, int in
, int out
,
156 int errdes ATTRIBUTE_UNUSED
, const char **errmsg
,
159 struct pex_msdos
*ms
;
161 int temp_base_allocated
;
172 ms
= (struct pex_msdos
*) obj
->sysdep
;
174 /* FIXME: I don't know how to redirect stderr, so we ignore ERRDES
175 and PEX_STDERR_TO_STDOUT. */
177 temp_base
= obj
->temp_base
;
178 if (temp_base
!= NULL
)
179 temp_base_allocated
= 0;
182 temp_base
= choose_temp_base ();
183 temp_base_allocated
= 1;
186 rf
= concat (temp_base
, ".gp", NULL
);
188 if (temp_base_allocated
)
191 if (in
== STDIN_FILE_NO
)
198 inindex
= pex_msdos_fdindex (ms
, in
);
199 infile
= ms
->files
[inindex
];
202 if (out
== STDOUT_FILE_NO
)
209 outindex
= pex_msdos_fdindex (ms
, out
);
210 outfile
= ms
->files
[outindex
];
213 scmd
= XNEWVEC (char, strlen (program
)
214 + ((flags
& PEXECUTE_SEARCH
) != 0 ? 4 : 0)
219 sprintf (scmd
, "%s%s @%s%s%s%s%s",
221 (flags
& PEXECUTE_SEARCH
) != 0 ? ".exe" : "",
223 inindex
!= -1 ? " <" : "",
225 outindex
!= -1 ? " >" : "",
228 argfile
= fopen (rf
, "w");
234 *errmsg
= "cannot open temporary command file";
238 for (i
= 1; argv
[i
] != NULL
; ++i
)
242 for (p
= argv
[i
]; *p
!= '\0'; ++p
)
244 if (*p
== '"' || *p
== '\'' || *p
== '\\' || ISSPACE (*p
))
245 putc ('\\', argfile
);
248 putc ('\n', argfile
);
253 status
= system (scmd
);
269 /* Save the exit status for later. When we are called, obj->count
270 is the number of children which have executed before this
272 ms
->statuses
= XRESIZEVEC(int, ms
->statuses
, obj
->count
+ 1);
273 ms
->statuses
[obj
->count
] = status
;
278 /* Wait for a child process to complete. Actually the child process
279 has already completed, and we just need to return the exit
283 pex_msdos_wait (struct pex_obj
*obj
, long pid
, int *status
,
284 struct pex_time
*time
, int done ATTRIBUTE_UNUSED
,
285 const char **errmsg ATTRIBUTE_UNUSED
,
286 int *err ATTRIBUTE_UNUSED
)
288 struct pex_msdos
*ms
;
290 ms
= (struct pex_msdos
*) obj
->sysdep
;
293 memset (time
, 0, sizeof *time
);
295 *status
= ms
->statuses
[pid
];
300 /* Clean up the pex_msdos structure. */
303 pex_msdos_cleanup (struct pex_obj
*obj
)
305 struct pex_msdos
*ms
;
308 ms
= (struct pex_msdos
*) obj
->sysdep
;
309 for (i
= 0; i
< PEX_MSDOS_FILE_COUNT
; ++i
)
310 if (msdos
->files
[i
] != NULL
)
311 free (msdos
->files
[i
]);
312 if (msdos
->statuses
!= NULL
)
313 free (msdos
->statuses
);
This page took 0.039359 seconds and 4 git commands to generate.