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) 1996-2018 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
35 #include "safe-ctype.h"
38 /* The structure we keep in obj->sysdep. */
40 #define PEX_MSDOS_FILE_COUNT 3
42 #define PEX_MSDOS_FD_OFFSET 10
46 /* An array of file names. We refer to these using file descriptors
47 of 10 + array index. */
48 const char *files
[PEX_MSDOS_FILE_COUNT
];
49 /* Exit statuses of programs which have been run. */
53 static int pex_msdos_open (struct pex_obj
*, const char *, int);
54 static int pex_msdos_open (struct pex_obj
*, const char *, int);
55 static int pex_msdos_fdindex (struct pex_msdos
*, int);
56 static pid_t
pex_msdos_exec_child (struct pex_obj
*, int, const char *,
57 char * const *, char * const *,
59 int, const char **, int *);
60 static int pex_msdos_close (struct pex_obj
*, int);
61 static pid_t
pex_msdos_wait (struct pex_obj
*, pid_t
, 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
=
80 /* Return a newly initialized pex_obj structure. */
83 pex_init (int flags
, const char *pname
, const char *tempbase
)
88 /* MSDOS does not support pipes. */
89 flags
&= ~ PEX_USE_PIPES
;
91 ret
= pex_init_common (flags
, pname
, tempbase
, funcs
);
93 ret
->sysdep
= XNEW (struct pex_msdos
);
94 for (i
= 0; i
< PEX_MSDOS_FILE_COUNT
; ++i
)
101 /* Open a file. FIXME: We ignore the binary argument, since we have
102 no way to handle it. */
105 pex_msdos_open (struct pex_obj
*obj
, const char *name
,
106 int binary ATTRIBUTE_UNUSED
)
108 struct pex_msdos
*ms
;
111 ms
= (struct pex_msdos
*) obj
->sysdep
;
113 for (i
= 0; i
< PEX_MSDOS_FILE_COUNT
; ++i
)
115 if (ms
->files
[i
] == NULL
)
117 ms
->files
[i
] = xstrdup (name
);
118 return i
+ PEX_MSDOS_FD_OFFSET
;
125 /* Get the index into msdos->files associated with an open file
129 pex_msdos_fdindex (struct pex_msdos
*ms
, int fd
)
131 fd
-= PEX_MSDOS_FD_OFFSET
;
132 if (fd
< 0 || fd
>= PEX_MSDOS_FILE_COUNT
|| ms
->files
[fd
] == NULL
)
141 pex_msdos_close (struct pex_obj
*obj
, int fd
)
143 struct pex_msdos
*ms
;
146 ms
= (struct pex_msdos
*) obj
->sysdep
;
147 fdindex
= pe_msdos_fdindex (ms
, fd
);
148 free (ms
->files
[fdindex
]);
149 ms
->files
[fdindex
] = NULL
;
152 /* Execute a child. */
155 pex_msdos_exec_child (struct pex_obj
*obj
, int flags
, const char *executable
,
156 char * const * argv
, char * const * env
, int in
, int out
,
157 int toclose ATTRIBUTE_UNUSED
,
158 int errdes ATTRIBUTE_UNUSED
, const char **errmsg
,
161 struct pex_msdos
*ms
;
163 int temp_base_allocated
;
174 ms
= (struct pex_msdos
*) obj
->sysdep
;
176 /* FIXME: I don't know how to redirect stderr, so we ignore ERRDES
177 and PEX_STDERR_TO_STDOUT. */
179 temp_base
= obj
->temp_base
;
180 if (temp_base
!= NULL
)
181 temp_base_allocated
= 0;
184 temp_base
= choose_temp_base ();
185 temp_base_allocated
= 1;
188 rf
= concat (temp_base
, ".gp", NULL
);
190 if (temp_base_allocated
)
193 if (in
== STDIN_FILE_NO
)
200 inindex
= pex_msdos_fdindex (ms
, in
);
201 infile
= ms
->files
[inindex
];
204 if (out
== STDOUT_FILE_NO
)
211 outindex
= pex_msdos_fdindex (ms
, out
);
212 outfile
= ms
->files
[outindex
];
215 scmd
= XNEWVEC (char, strlen (program
)
216 + ((flags
& PEXECUTE_SEARCH
) != 0 ? 4 : 0)
221 sprintf (scmd
, "%s%s @%s%s%s%s%s",
223 (flags
& PEXECUTE_SEARCH
) != 0 ? ".exe" : "",
225 inindex
!= -1 ? " <" : "",
227 outindex
!= -1 ? " >" : "",
230 argfile
= fopen (rf
, "w");
236 *errmsg
= "cannot open temporary command file";
240 for (i
= 1; argv
[i
] != NULL
; ++i
)
244 for (p
= argv
[i
]; *p
!= '\0'; ++p
)
246 if (*p
== '"' || *p
== '\'' || *p
== '\\' || ISSPACE (*p
))
247 putc ('\\', argfile
);
250 putc ('\n', argfile
);
255 status
= system (scmd
);
271 /* Save the exit status for later. When we are called, obj->count
272 is the number of children which have executed before this
274 ms
->statuses
= XRESIZEVEC(int, ms
->statuses
, obj
->count
+ 1);
275 ms
->statuses
[obj
->count
] = status
;
277 return (pid_t
) obj
->count
;
280 /* Wait for a child process to complete. Actually the child process
281 has already completed, and we just need to return the exit
285 pex_msdos_wait (struct pex_obj
*obj
, pid_t pid
, int *status
,
286 struct pex_time
*time
, int done ATTRIBUTE_UNUSED
,
287 const char **errmsg ATTRIBUTE_UNUSED
,
288 int *err ATTRIBUTE_UNUSED
)
290 struct pex_msdos
*ms
;
292 ms
= (struct pex_msdos
*) obj
->sysdep
;
295 memset (time
, 0, sizeof *time
);
297 *status
= ms
->statuses
[pid
];
302 /* Clean up the pex_msdos structure. */
305 pex_msdos_cleanup (struct pex_obj
*obj
)
307 struct pex_msdos
*ms
;
310 ms
= (struct pex_msdos
*) obj
->sysdep
;
311 for (i
= 0; i
< PEX_MSDOS_FILE_COUNT
; ++i
)
312 free (msdos
->files
[i
]);
313 free (msdos
->statuses
);
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