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);