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 pid_t pex_msdos_exec_child (struct pex_obj *, int, const char *,
58 char * const *, char * const *,
60 int, const char **, int *);
61 static int pex_msdos_close (struct pex_obj *, int);
62 static pid_t pex_msdos_wait (struct pex_obj *, pid_t, int *, struct pex_time *,
63 int, const char **, int *);
64 static void pex_msdos_cleanup (struct pex_obj *);
66 /* The list of functions we pass to the common routines. */
68 const struct pex_funcs funcs =
81 /* Return a newly initialized pex_obj structure. */
84 pex_init (int flags, const char *pname, const char *tempbase)
89 /* MSDOS does not support pipes. */
90 flags &= ~ PEX_USE_PIPES;
92 ret = pex_init_common (flags, pname, tempbase, funcs);
94 ret->sysdep = XNEW (struct pex_msdos);
95 for (i = 0; i < PEX_MSDOS_FILE_COUNT; ++i)
102 /* Open a file. FIXME: We ignore the binary argument, since we have
103 no way to handle it. */
106 pex_msdos_open (struct pex_obj *obj, const char *name,
107 int binary ATTRIBUTE_UNUSED)
109 struct pex_msdos *ms;
112 ms = (struct pex_msdos *) obj->sysdep;
114 for (i = 0; i < PEX_MSDOS_FILE_COUNT; ++i)
116 if (ms->files[i] == NULL)
118 ms->files[i] = xstrdup (name);
119 return i + PEX_MSDOS_FD_OFFSET;
126 /* Get the index into msdos->files associated with an open file
130 pex_msdos_fdindex (struct pex_msdos *ms, int fd)
132 fd -= PEX_MSDOS_FD_OFFSET;
133 if (fd < 0 || fd >= PEX_MSDOS_FILE_COUNT || ms->files[fd] == NULL)
142 pex_msdos_close (struct pex_obj *obj, int fd)
144 struct pex_msdos *ms;
147 ms = (struct pex_msdos *) obj->sysdep;
148 fdindex = pe_msdos_fdindex (ms, fd);
149 free (ms->files[fdindex]);
150 ms->files[fdindex] = NULL;
153 /* Execute a child. */
156 pex_msdos_exec_child (struct pex_obj *obj, int flags, const char *executable,
157 char * const * argv, char * const * env, int in, int out,
158 int toclose ATTRIBUTE_UNUSED,
159 int errdes ATTRIBUTE_UNUSED, const char **errmsg,
162 struct pex_msdos *ms;
164 int temp_base_allocated;
175 ms = (struct pex_msdos *) obj->sysdep;
177 /* FIXME: I don't know how to redirect stderr, so we ignore ERRDES
178 and PEX_STDERR_TO_STDOUT. */
180 temp_base = obj->temp_base;
181 if (temp_base != NULL)
182 temp_base_allocated = 0;
185 temp_base = choose_temp_base ();
186 temp_base_allocated = 1;
189 rf = concat (temp_base, ".gp", NULL);
191 if (temp_base_allocated)
194 if (in == STDIN_FILE_NO)
201 inindex = pex_msdos_fdindex (ms, in);
202 infile = ms->files[inindex];
205 if (out == STDOUT_FILE_NO)
212 outindex = pex_msdos_fdindex (ms, out);
213 outfile = ms->files[outindex];
216 scmd = XNEWVEC (char, strlen (program)
217 + ((flags & PEXECUTE_SEARCH) != 0 ? 4 : 0)
222 sprintf (scmd, "%s%s @%s%s%s%s%s",
224 (flags & PEXECUTE_SEARCH) != 0 ? ".exe" : "",
226 inindex != -1 ? " <" : "",
228 outindex != -1 ? " >" : "",
231 argfile = fopen (rf, "w");
237 *errmsg = "cannot open temporary command file";
241 for (i = 1; argv[i] != NULL; ++i)
245 for (p = argv[i]; *p != '\0'; ++p)
247 if (*p == '"' || *p == '\'' || *p == '\\' || ISSPACE (*p))
248 putc ('\\', argfile);
251 putc ('\n', argfile);
256 status = system (scmd);
272 /* Save the exit status for later. When we are called, obj->count
273 is the number of children which have executed before this
275 ms->statuses = XRESIZEVEC(int, ms->statuses, obj->count + 1);
276 ms->statuses[obj->count] = status;
278 return (pid_t) obj->count;
281 /* Wait for a child process to complete. Actually the child process
282 has already completed, and we just need to return the exit
286 pex_msdos_wait (struct pex_obj *obj, pid_t pid, int *status,
287 struct pex_time *time, int done ATTRIBUTE_UNUSED,
288 const char **errmsg ATTRIBUTE_UNUSED,
289 int *err ATTRIBUTE_UNUSED)
291 struct pex_msdos *ms;
293 ms = (struct pex_msdos *) obj->sysdep;
296 memset (time, 0, sizeof *time);
298 *status = ms->statuses[pid];
303 /* Clean up the pex_msdos structure. */
306 pex_msdos_cleanup (struct pex_obj *obj)
308 struct pex_msdos *ms;
311 ms = (struct pex_msdos *) obj->sysdep;
312 for (i = 0; i < PEX_MSDOS_FILE_COUNT; ++i)
313 free (msdos->files[i]);
314 free (msdos->statuses);