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/* Copyright (C) 2004
Free Software Foundation, Inc.
Written by: Keith Marshall (keith.d.marshall@ntlworld.com)
This file is part of groff.
groff is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 2, or (at your option) any later
version.
groff 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 General Public License
for more details.
You should have received a copy of the GNU General Public License along
with groff; see the file COPYING. If not, write to the Free Software
Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <stdio.h>
#include <stdlib.h>
#ifdef HAVE_PROCESS_H
# include <process.h>
#endif
#define SPAWNVP_C 1
/* Define the default mechanism, and messages, for error reporting
* (user may substitute a preferred alternative, by defining his own
* implementation of the macros REPORT_ERROR, QUOTE_ARG_MALLOC_FAILED
* and QUOTE_ARG_REALLOC_FAILED, in a header file called 'nonposix.h').
*/
#include "nonposix.h"
#ifndef REPORT_ERROR
# define REPORT_ERROR(WHY) fprintf(stderr, "%s:%s\n", program_name, WHY)
#endif
#ifndef SPAWNVP_MALLOC_ERROR
# define SPAWNVP_MALLOC_ERROR "malloc:allocation for 'argv' failed"
#endif
extern char *program_name;
extern char *quote_arg(char *string);
extern void purge_quoted_args(char **argv);
int
spawnvp_wrapper(int mode, char *path, char **argv)
{
/* Invoke the system `spawnvp' service
* enclosing the passed arguments in double quotes, as required,
* so that the (broken) default parsing in the MSVC runtime doesn't
* split them at whitespace. */
char **quoted_argv; /* used to build a quoted local copy of `argv' */
int i; /* used as an index into `argv' or `quoted_argv' */
int status = -1; /* initialise return code, in case we fail */
int argc = 0; /* initialise argument count; may be none */
/* First count the number of arguments
* which are actually present in the passed `argv'. */
if (argv)
for (quoted_argv = argv; *quoted_argv; ++argc, ++quoted_argv)
;
/* If we do not now have an argument count,
* then we must fall through and fail. */
if (argc) {
/* We do have at least one argument:
* We will use a copy of the `argv', in which to do the quoting,
* so we must allocate space for it. */
if ((quoted_argv = malloc(++argc * sizeof(char **))) == NULL) {
/* If we didn't get enough space,
* then complain, and bail out gracefully. */
REPORT_ERROR(SPAWNVP_MALLOC_ERROR);
exit(1);
}
/* Now copy the passed `argv' into our new vector,
* quoting it contents as required. */
for (i = 0; i < argc; i++)
quoted_argv[i] = quote_arg(argv[i]);
/* Invoke the MSVC `spawnvp' service
* passing our now appropriately quoted copy of `argv'. */
status = spawnvp(mode, path, quoted_argv);
/* Clean up our memory allocations
* for the quoted copy of `argv', which is no longer required. */
purge_quoted_args(quoted_argv);
free(quoted_argv);
}
/* Finally,
* return the status code returned by `spawnvp',
* or a failure code if we fell through. */
return status;
}
/* spawnvp.c: end of file */
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