110d565efSmrg /* Utilities to execute a program in a subprocess (possibly linked by pipes
210d565efSmrg with other subprocesses), and wait for it. Generic MSDOS specialization.
3*ec02198aSmrg Copyright (C) 1996-2020 Free Software Foundation, Inc.
410d565efSmrg
510d565efSmrg This file is part of the libiberty library.
610d565efSmrg Libiberty is free software; you can redistribute it and/or
710d565efSmrg modify it under the terms of the GNU Library General Public
810d565efSmrg License as published by the Free Software Foundation; either
910d565efSmrg version 2 of the License, or (at your option) any later version.
1010d565efSmrg
1110d565efSmrg Libiberty is distributed in the hope that it will be useful,
1210d565efSmrg but WITHOUT ANY WARRANTY; without even the implied warranty of
1310d565efSmrg MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
1410d565efSmrg Library General Public License for more details.
1510d565efSmrg
1610d565efSmrg You should have received a copy of the GNU Library General Public
1710d565efSmrg License along with libiberty; see the file COPYING.LIB. If not,
1810d565efSmrg write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
1910d565efSmrg Boston, MA 02110-1301, USA. */
2010d565efSmrg
2110d565efSmrg #include "pex-common.h"
2210d565efSmrg
2310d565efSmrg #include <stdio.h>
2410d565efSmrg #include <errno.h>
2510d565efSmrg #ifdef NEED_DECLARATION_ERRNO
2610d565efSmrg extern int errno;
2710d565efSmrg #endif
2810d565efSmrg #ifdef HAVE_STRING_H
2910d565efSmrg #include <string.h>
3010d565efSmrg #endif
3110d565efSmrg #ifdef HAVE_STDLIB_H
3210d565efSmrg #include <stdlib.h>
3310d565efSmrg #endif
3410d565efSmrg
3510d565efSmrg #include "safe-ctype.h"
3610d565efSmrg #include <process.h>
3710d565efSmrg
3810d565efSmrg /* The structure we keep in obj->sysdep. */
3910d565efSmrg
4010d565efSmrg #define PEX_MSDOS_FILE_COUNT 3
4110d565efSmrg
4210d565efSmrg #define PEX_MSDOS_FD_OFFSET 10
4310d565efSmrg
4410d565efSmrg struct pex_msdos
4510d565efSmrg {
4610d565efSmrg /* An array of file names. We refer to these using file descriptors
4710d565efSmrg of 10 + array index. */
4810d565efSmrg const char *files[PEX_MSDOS_FILE_COUNT];
4910d565efSmrg /* Exit statuses of programs which have been run. */
5010d565efSmrg int *statuses;
5110d565efSmrg };
5210d565efSmrg
5310d565efSmrg static int pex_msdos_open (struct pex_obj *, const char *, int);
5410d565efSmrg static int pex_msdos_open (struct pex_obj *, const char *, int);
5510d565efSmrg static int pex_msdos_fdindex (struct pex_msdos *, int);
5610d565efSmrg static pid_t pex_msdos_exec_child (struct pex_obj *, int, const char *,
5710d565efSmrg char * const *, char * const *,
5810d565efSmrg int, int, int, int,
5910d565efSmrg int, const char **, int *);
6010d565efSmrg static int pex_msdos_close (struct pex_obj *, int);
6110d565efSmrg static pid_t pex_msdos_wait (struct pex_obj *, pid_t, int *, struct pex_time *,
6210d565efSmrg int, const char **, int *);
6310d565efSmrg static void pex_msdos_cleanup (struct pex_obj *);
6410d565efSmrg
6510d565efSmrg /* The list of functions we pass to the common routines. */
6610d565efSmrg
6710d565efSmrg const struct pex_funcs funcs =
6810d565efSmrg {
6910d565efSmrg pex_msdos_open,
7010d565efSmrg pex_msdos_open,
7110d565efSmrg pex_msdos_exec_child,
7210d565efSmrg pex_msdos_close,
7310d565efSmrg pex_msdos_wait,
7410d565efSmrg NULL, /* pipe */
7510d565efSmrg NULL, /* fdopenr */
7610d565efSmrg NULL, /* fdopenw */
7710d565efSmrg pex_msdos_cleanup
7810d565efSmrg };
7910d565efSmrg
8010d565efSmrg /* Return a newly initialized pex_obj structure. */
8110d565efSmrg
8210d565efSmrg struct pex_obj *
pex_init(int flags,const char * pname,const char * tempbase)8310d565efSmrg pex_init (int flags, const char *pname, const char *tempbase)
8410d565efSmrg {
8510d565efSmrg struct pex_obj *ret;
8610d565efSmrg int i;
8710d565efSmrg
8810d565efSmrg /* MSDOS does not support pipes. */
8910d565efSmrg flags &= ~ PEX_USE_PIPES;
9010d565efSmrg
9110d565efSmrg ret = pex_init_common (flags, pname, tempbase, funcs);
9210d565efSmrg
9310d565efSmrg ret->sysdep = XNEW (struct pex_msdos);
9410d565efSmrg for (i = 0; i < PEX_MSDOS_FILE_COUNT; ++i)
9510d565efSmrg ret->files[i] = NULL;
9610d565efSmrg ret->statuses = NULL;
9710d565efSmrg
9810d565efSmrg return ret;
9910d565efSmrg }
10010d565efSmrg
10110d565efSmrg /* Open a file. FIXME: We ignore the binary argument, since we have
10210d565efSmrg no way to handle it. */
10310d565efSmrg
10410d565efSmrg static int
pex_msdos_open(struct pex_obj * obj,const char * name,int binary ATTRIBUTE_UNUSED)10510d565efSmrg pex_msdos_open (struct pex_obj *obj, const char *name,
10610d565efSmrg int binary ATTRIBUTE_UNUSED)
10710d565efSmrg {
10810d565efSmrg struct pex_msdos *ms;
10910d565efSmrg int i;
11010d565efSmrg
11110d565efSmrg ms = (struct pex_msdos *) obj->sysdep;
11210d565efSmrg
11310d565efSmrg for (i = 0; i < PEX_MSDOS_FILE_COUNT; ++i)
11410d565efSmrg {
11510d565efSmrg if (ms->files[i] == NULL)
11610d565efSmrg {
11710d565efSmrg ms->files[i] = xstrdup (name);
11810d565efSmrg return i + PEX_MSDOS_FD_OFFSET;
11910d565efSmrg }
12010d565efSmrg }
12110d565efSmrg
12210d565efSmrg abort ();
12310d565efSmrg }
12410d565efSmrg
12510d565efSmrg /* Get the index into msdos->files associated with an open file
12610d565efSmrg descriptor. */
12710d565efSmrg
12810d565efSmrg static int
pex_msdos_fdindex(struct pex_msdos * ms,int fd)12910d565efSmrg pex_msdos_fdindex (struct pex_msdos *ms, int fd)
13010d565efSmrg {
13110d565efSmrg fd -= PEX_MSDOS_FD_OFFSET;
13210d565efSmrg if (fd < 0 || fd >= PEX_MSDOS_FILE_COUNT || ms->files[fd] == NULL)
13310d565efSmrg abort ();
13410d565efSmrg return fd;
13510d565efSmrg }
13610d565efSmrg
13710d565efSmrg
13810d565efSmrg /* Close a file. */
13910d565efSmrg
14010d565efSmrg static int
pex_msdos_close(struct pex_obj * obj,int fd)14110d565efSmrg pex_msdos_close (struct pex_obj *obj, int fd)
14210d565efSmrg {
14310d565efSmrg struct pex_msdos *ms;
14410d565efSmrg int fdinex;
14510d565efSmrg
14610d565efSmrg ms = (struct pex_msdos *) obj->sysdep;
14710d565efSmrg fdindex = pe_msdos_fdindex (ms, fd);
14810d565efSmrg free (ms->files[fdindex]);
14910d565efSmrg ms->files[fdindex] = NULL;
15010d565efSmrg }
15110d565efSmrg
15210d565efSmrg /* Execute a child. */
15310d565efSmrg
15410d565efSmrg static pid_t
pex_msdos_exec_child(struct pex_obj * obj,int flags,const char * executable,char * const * argv,char * const * env,int in,int out,int toclose ATTRIBUTE_UNUSED,int errdes ATTRIBUTE_UNUSED,const char ** errmsg,int * err)15510d565efSmrg pex_msdos_exec_child (struct pex_obj *obj, int flags, const char *executable,
15610d565efSmrg char * const * argv, char * const * env, int in, int out,
15710d565efSmrg int toclose ATTRIBUTE_UNUSED,
15810d565efSmrg int errdes ATTRIBUTE_UNUSED, const char **errmsg,
15910d565efSmrg int *err)
16010d565efSmrg {
16110d565efSmrg struct pex_msdos *ms;
16210d565efSmrg char *temp_base;
16310d565efSmrg int temp_base_allocated;
16410d565efSmrg char *rf;
16510d565efSmrg int inindex;
16610d565efSmrg char *infile;
16710d565efSmrg int outindex;
16810d565efSmrg char *outfile;
16910d565efSmrg char *scmd;
17010d565efSmrg FILE *argfile;
17110d565efSmrg int i;
17210d565efSmrg int status;
17310d565efSmrg
17410d565efSmrg ms = (struct pex_msdos *) obj->sysdep;
17510d565efSmrg
17610d565efSmrg /* FIXME: I don't know how to redirect stderr, so we ignore ERRDES
17710d565efSmrg and PEX_STDERR_TO_STDOUT. */
17810d565efSmrg
17910d565efSmrg temp_base = obj->temp_base;
18010d565efSmrg if (temp_base != NULL)
18110d565efSmrg temp_base_allocated = 0;
18210d565efSmrg else
18310d565efSmrg {
18410d565efSmrg temp_base = choose_temp_base ();
18510d565efSmrg temp_base_allocated = 1;
18610d565efSmrg }
18710d565efSmrg
18810d565efSmrg rf = concat (temp_base, ".gp", NULL);
18910d565efSmrg
19010d565efSmrg if (temp_base_allocated)
19110d565efSmrg free (temp_base);
19210d565efSmrg
19310d565efSmrg if (in == STDIN_FILE_NO)
19410d565efSmrg {
19510d565efSmrg inindex = -1;
19610d565efSmrg infile = "";
19710d565efSmrg }
19810d565efSmrg else
19910d565efSmrg {
20010d565efSmrg inindex = pex_msdos_fdindex (ms, in);
20110d565efSmrg infile = ms->files[inindex];
20210d565efSmrg }
20310d565efSmrg
20410d565efSmrg if (out == STDOUT_FILE_NO)
20510d565efSmrg {
20610d565efSmrg outindex = -1;
20710d565efSmrg outfile = "";
20810d565efSmrg }
20910d565efSmrg else
21010d565efSmrg {
21110d565efSmrg outindex = pex_msdos_fdindex (ms, out);
21210d565efSmrg outfile = ms->files[outindex];
21310d565efSmrg }
21410d565efSmrg
21510d565efSmrg scmd = XNEWVEC (char, strlen (program)
21610d565efSmrg + ((flags & PEXECUTE_SEARCH) != 0 ? 4 : 0)
21710d565efSmrg + strlen (rf)
21810d565efSmrg + strlen (infile)
21910d565efSmrg + strlen (outfile)
22010d565efSmrg + 10);
22110d565efSmrg sprintf (scmd, "%s%s @%s%s%s%s%s",
22210d565efSmrg program,
22310d565efSmrg (flags & PEXECUTE_SEARCH) != 0 ? ".exe" : "",
22410d565efSmrg rf,
22510d565efSmrg inindex != -1 ? " <" : "",
22610d565efSmrg infile,
22710d565efSmrg outindex != -1 ? " >" : "",
22810d565efSmrg outfile);
22910d565efSmrg
23010d565efSmrg argfile = fopen (rf, "w");
23110d565efSmrg if (argfile == NULL)
23210d565efSmrg {
23310d565efSmrg *err = errno;
23410d565efSmrg free (scmd);
23510d565efSmrg free (rf);
23610d565efSmrg *errmsg = "cannot open temporary command file";
23710d565efSmrg return (pid_t) -1;
23810d565efSmrg }
23910d565efSmrg
24010d565efSmrg for (i = 1; argv[i] != NULL; ++i)
24110d565efSmrg {
24210d565efSmrg char *p;
24310d565efSmrg
24410d565efSmrg for (p = argv[i]; *p != '\0'; ++p)
24510d565efSmrg {
24610d565efSmrg if (*p == '"' || *p == '\'' || *p == '\\' || ISSPACE (*p))
24710d565efSmrg putc ('\\', argfile);
24810d565efSmrg putc (*p, argfile);
24910d565efSmrg }
25010d565efSmrg putc ('\n', argfile);
25110d565efSmrg }
25210d565efSmrg
25310d565efSmrg fclose (argfile);
25410d565efSmrg
25510d565efSmrg status = system (scmd);
25610d565efSmrg
25710d565efSmrg if (status == -1)
25810d565efSmrg {
25910d565efSmrg *err = errno;
26010d565efSmrg remove (rf);
26110d565efSmrg free (scmd);
26210d565efSmrg free (rf);
26310d565efSmrg *errmsg = "system";
26410d565efSmrg return (pid_t) -1;
26510d565efSmrg }
26610d565efSmrg
26710d565efSmrg remove (rf);
26810d565efSmrg free (scmd);
26910d565efSmrg free (rf);
27010d565efSmrg
27110d565efSmrg /* Save the exit status for later. When we are called, obj->count
27210d565efSmrg is the number of children which have executed before this
27310d565efSmrg one. */
27410d565efSmrg ms->statuses = XRESIZEVEC(int, ms->statuses, obj->count + 1);
27510d565efSmrg ms->statuses[obj->count] = status;
27610d565efSmrg
27710d565efSmrg return (pid_t) obj->count;
27810d565efSmrg }
27910d565efSmrg
28010d565efSmrg /* Wait for a child process to complete. Actually the child process
28110d565efSmrg has already completed, and we just need to return the exit
28210d565efSmrg status. */
28310d565efSmrg
28410d565efSmrg static pid_t
pex_msdos_wait(struct pex_obj * obj,pid_t pid,int * status,struct pex_time * time,int done ATTRIBUTE_UNUSED,const char ** errmsg ATTRIBUTE_UNUSED,int * err ATTRIBUTE_UNUSED)28510d565efSmrg pex_msdos_wait (struct pex_obj *obj, pid_t pid, int *status,
28610d565efSmrg struct pex_time *time, int done ATTRIBUTE_UNUSED,
28710d565efSmrg const char **errmsg ATTRIBUTE_UNUSED,
28810d565efSmrg int *err ATTRIBUTE_UNUSED)
28910d565efSmrg {
29010d565efSmrg struct pex_msdos *ms;
29110d565efSmrg
29210d565efSmrg ms = (struct pex_msdos *) obj->sysdep;
29310d565efSmrg
29410d565efSmrg if (time != NULL)
29510d565efSmrg memset (time, 0, sizeof *time);
29610d565efSmrg
29710d565efSmrg *status = ms->statuses[pid];
29810d565efSmrg
29910d565efSmrg return 0;
30010d565efSmrg }
30110d565efSmrg
30210d565efSmrg /* Clean up the pex_msdos structure. */
30310d565efSmrg
30410d565efSmrg static void
pex_msdos_cleanup(struct pex_obj * obj)30510d565efSmrg pex_msdos_cleanup (struct pex_obj *obj)
30610d565efSmrg {
30710d565efSmrg struct pex_msdos *ms;
30810d565efSmrg int i;
30910d565efSmrg
31010d565efSmrg ms = (struct pex_msdos *) obj->sysdep;
31110d565efSmrg for (i = 0; i < PEX_MSDOS_FILE_COUNT; ++i)
31210d565efSmrg free (msdos->files[i]);
31310d565efSmrg free (msdos->statuses);
31410d565efSmrg free (msdos);
31510d565efSmrg obj->sysdep = NULL;
31610d565efSmrg }
317