320 lines
7.2 KiB
C
320 lines
7.2 KiB
C
/* Utilities to execute a program in a subprocess (possibly linked by pipes
|
|
with other subprocesses), and wait for it. Generic MSDOS specialization.
|
|
Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2003, 2005
|
|
Free Software Foundation, Inc.
|
|
|
|
This file is part of the libiberty library.
|
|
Libiberty is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Library General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2 of the License, or (at your option) any later version.
|
|
|
|
Libiberty is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Library General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Library General Public
|
|
License along with libiberty; see the file COPYING.LIB. If not,
|
|
write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
|
|
Boston, MA 02110-1301, USA. */
|
|
|
|
#include "pex-common.h"
|
|
|
|
#include <stdio.h>
|
|
#include <errno.h>
|
|
#ifdef NEED_DECLARATION_ERRNO
|
|
extern int errno;
|
|
#endif
|
|
#ifdef HAVE_STRING_H
|
|
#include <string.h>
|
|
#endif
|
|
#ifdef HAVE_STDLIB_H
|
|
#include <stdlib.h>
|
|
#endif
|
|
|
|
#include "safe-ctype.h"
|
|
#include <process.h>
|
|
|
|
/* The structure we keep in obj->sysdep. */
|
|
|
|
#define PEX_MSDOS_FILE_COUNT 3
|
|
|
|
#define PEX_MSDOS_FD_OFFSET 10
|
|
|
|
struct pex_msdos
|
|
{
|
|
/* An array of file names. We refer to these using file descriptors
|
|
of 10 + array index. */
|
|
const char *files[PEX_MSDOS_FILE_COUNT];
|
|
/* Exit statuses of programs which have been run. */
|
|
int *statuses;
|
|
};
|
|
|
|
static int pex_msdos_open (struct pex_obj *, const char *, int);
|
|
static int pex_msdos_open (struct pex_obj *, const char *, int);
|
|
static int pex_msdos_fdindex (struct pex_msdos *, int);
|
|
static long pex_msdos_exec_child (struct pex_obj *, int, const char *,
|
|
char * const *, char * const *,
|
|
int, int, int, int,
|
|
int, const char **, int *);
|
|
static int pex_msdos_close (struct pex_obj *, int);
|
|
static int pex_msdos_wait (struct pex_obj *, long, int *, struct pex_time *,
|
|
int, const char **, int *);
|
|
static void pex_msdos_cleanup (struct pex_obj *);
|
|
|
|
/* The list of functions we pass to the common routines. */
|
|
|
|
const struct pex_funcs funcs =
|
|
{
|
|
pex_msdos_open,
|
|
pex_msdos_open,
|
|
pex_msdos_exec_child,
|
|
pex_msdos_close,
|
|
pex_msdos_wait,
|
|
NULL, /* pipe */
|
|
NULL, /* fdopenr */
|
|
NULL, /* fdopenw */
|
|
pex_msdos_cleanup
|
|
};
|
|
|
|
/* Return a newly initialized pex_obj structure. */
|
|
|
|
struct pex_obj *
|
|
pex_init (int flags, const char *pname, const char *tempbase)
|
|
{
|
|
struct pex_obj *ret;
|
|
int i;
|
|
|
|
/* MSDOS does not support pipes. */
|
|
flags &= ~ PEX_USE_PIPES;
|
|
|
|
ret = pex_init_common (flags, pname, tempbase, funcs);
|
|
|
|
ret->sysdep = XNEW (struct pex_msdos);
|
|
for (i = 0; i < PEX_MSDOS_FILE_COUNT; ++i)
|
|
ret->files[i] = NULL;
|
|
ret->statuses = NULL;
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* Open a file. FIXME: We ignore the binary argument, since we have
|
|
no way to handle it. */
|
|
|
|
static int
|
|
pex_msdos_open (struct pex_obj *obj, const char *name,
|
|
int binary ATTRIBUTE_UNUSED)
|
|
{
|
|
struct pex_msdos *ms;
|
|
int i;
|
|
|
|
ms = (struct pex_msdos *) obj->sysdep;
|
|
|
|
for (i = 0; i < PEX_MSDOS_FILE_COUNT; ++i)
|
|
{
|
|
if (ms->files[i] == NULL)
|
|
{
|
|
ms->files[i] = xstrdup (name);
|
|
return i + PEX_MSDOS_FD_OFFSET;
|
|
}
|
|
}
|
|
|
|
abort ();
|
|
}
|
|
|
|
/* Get the index into msdos->files associated with an open file
|
|
descriptor. */
|
|
|
|
static int
|
|
pex_msdos_fdindex (struct pex_msdos *ms, int fd)
|
|
{
|
|
fd -= PEX_MSDOS_FD_OFFSET;
|
|
if (fd < 0 || fd >= PEX_MSDOS_FILE_COUNT || ms->files[fd] == NULL)
|
|
abort ();
|
|
return fd;
|
|
}
|
|
|
|
|
|
/* Close a file. */
|
|
|
|
static int
|
|
pex_msdos_close (struct pex_obj *obj, int fd)
|
|
{
|
|
struct pex_msdos *ms;
|
|
int fdinex;
|
|
|
|
ms = (struct pex_msdos *) obj->sysdep;
|
|
fdindex = pe_msdos_fdindex (ms, fd);
|
|
free (ms->files[fdindex]);
|
|
ms->files[fdindex] = NULL;
|
|
}
|
|
|
|
/* Execute a child. */
|
|
|
|
static long
|
|
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)
|
|
{
|
|
struct pex_msdos *ms;
|
|
char *temp_base;
|
|
int temp_base_allocated;
|
|
char *rf;
|
|
int inindex;
|
|
char *infile;
|
|
int outindex;
|
|
char *outfile;
|
|
char *scmd;
|
|
FILE *argfile;
|
|
int i;
|
|
int status;
|
|
|
|
ms = (struct pex_msdos *) obj->sysdep;
|
|
|
|
/* FIXME: I don't know how to redirect stderr, so we ignore ERRDES
|
|
and PEX_STDERR_TO_STDOUT. */
|
|
|
|
temp_base = obj->temp_base;
|
|
if (temp_base != NULL)
|
|
temp_base_allocated = 0;
|
|
else
|
|
{
|
|
temp_base = choose_temp_base ();
|
|
temp_base_allocated = 1;
|
|
}
|
|
|
|
rf = concat (temp_base, ".gp", NULL);
|
|
|
|
if (temp_base_allocated)
|
|
free (temp_base);
|
|
|
|
if (in == STDIN_FILE_NO)
|
|
{
|
|
inindex = -1;
|
|
infile = "";
|
|
}
|
|
else
|
|
{
|
|
inindex = pex_msdos_fdindex (ms, in);
|
|
infile = ms->files[inindex];
|
|
}
|
|
|
|
if (out == STDOUT_FILE_NO)
|
|
{
|
|
outindex = -1;
|
|
outfile = "";
|
|
}
|
|
else
|
|
{
|
|
outindex = pex_msdos_fdindex (ms, out);
|
|
outfile = ms->files[outindex];
|
|
}
|
|
|
|
scmd = XNEWVEC (char, strlen (program)
|
|
+ ((flags & PEXECUTE_SEARCH) != 0 ? 4 : 0)
|
|
+ strlen (rf)
|
|
+ strlen (infile)
|
|
+ strlen (outfile)
|
|
+ 10);
|
|
sprintf (scmd, "%s%s @%s%s%s%s%s",
|
|
program,
|
|
(flags & PEXECUTE_SEARCH) != 0 ? ".exe" : "",
|
|
rf,
|
|
inindex != -1 ? " <" : "",
|
|
infile,
|
|
outindex != -1 ? " >" : "",
|
|
outfile);
|
|
|
|
argfile = fopen (rf, "w");
|
|
if (argfile == NULL)
|
|
{
|
|
*err = errno;
|
|
free (scmd);
|
|
free (rf);
|
|
*errmsg = "cannot open temporary command file";
|
|
return -1;
|
|
}
|
|
|
|
for (i = 1; argv[i] != NULL; ++i)
|
|
{
|
|
char *p;
|
|
|
|
for (p = argv[i]; *p != '\0'; ++p)
|
|
{
|
|
if (*p == '"' || *p == '\'' || *p == '\\' || ISSPACE (*p))
|
|
putc ('\\', argfile);
|
|
putc (*p, argfile);
|
|
}
|
|
putc ('\n', argfile);
|
|
}
|
|
|
|
fclose (argfile);
|
|
|
|
status = system (scmd);
|
|
|
|
if (status == -1)
|
|
{
|
|
*err = errno;
|
|
remove (rf);
|
|
free (scmd);
|
|
free (rf);
|
|
*errmsg = "system";
|
|
return -1;
|
|
}
|
|
|
|
remove (rf);
|
|
free (scmd);
|
|
free (rf);
|
|
|
|
/* Save the exit status for later. When we are called, obj->count
|
|
is the number of children which have executed before this
|
|
one. */
|
|
ms->statuses = XRESIZEVEC(int, ms->statuses, obj->count + 1);
|
|
ms->statuses[obj->count] = status;
|
|
|
|
return obj->count;
|
|
}
|
|
|
|
/* Wait for a child process to complete. Actually the child process
|
|
has already completed, and we just need to return the exit
|
|
status. */
|
|
|
|
static int
|
|
pex_msdos_wait (struct pex_obj *obj, long pid, int *status,
|
|
struct pex_time *time, int done ATTRIBUTE_UNUSED,
|
|
const char **errmsg ATTRIBUTE_UNUSED,
|
|
int *err ATTRIBUTE_UNUSED)
|
|
{
|
|
struct pex_msdos *ms;
|
|
|
|
ms = (struct pex_msdos *) obj->sysdep;
|
|
|
|
if (time != NULL)
|
|
memset (time, 0, sizeof *time);
|
|
|
|
*status = ms->statuses[pid];
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Clean up the pex_msdos structure. */
|
|
|
|
static void
|
|
pex_msdos_cleanup (struct pex_obj *obj)
|
|
{
|
|
struct pex_msdos *ms;
|
|
int i;
|
|
|
|
ms = (struct pex_msdos *) obj->sysdep;
|
|
for (i = 0; i < PEX_MSDOS_FILE_COUNT; ++i)
|
|
if (msdos->files[i] != NULL)
|
|
free (msdos->files[i]);
|
|
if (msdos->statuses != NULL)
|
|
free (msdos->statuses);
|
|
free (msdos);
|
|
obj->sysdep = NULL;
|
|
}
|