856bef3c17
sized integer' bites. The various malloc functions return pointers, but without any prototype/declarations visible to callers, the compiler expects them to return int.
88 lines
2.4 KiB
C
88 lines
2.4 KiB
C
/* prepend_args.c - utilility programs for manpiulating argv[]
|
|
Copyright (C) 1999 Free Software Foundation, Inc.
|
|
|
|
This program 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.
|
|
|
|
This program 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 this program; if not, write to the Free Software
|
|
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
|
|
02111-1307, USA. */
|
|
|
|
/* $FreeBSD$ */
|
|
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
# include <config.h>
|
|
#endif
|
|
#include <sys/param.h>
|
|
#include "prepend_args.h"
|
|
#include "port.h"
|
|
|
|
|
|
/* Find the white-space-separated options specified by OPTIONS, and
|
|
using BUF to store copies of these options, set ARGV[0], ARGV[1],
|
|
etc. to the option copies. Return the number N of options found.
|
|
Do not set ARGV[N] to NULL. If ARGV is NULL, do not store ARGV[0]
|
|
etc. Backslash can be used to escape whitespace (and backslashes). */
|
|
static int
|
|
prepend_args (options, buf, argv)
|
|
char const *options;
|
|
char *buf;
|
|
char **argv;
|
|
{
|
|
char const *o = options;
|
|
char *b = buf;
|
|
int n = 0;
|
|
|
|
for (;;)
|
|
{
|
|
while (isspace ((unsigned char) *o))
|
|
o++;
|
|
if (!*o)
|
|
return n;
|
|
if (argv)
|
|
argv[n] = b;
|
|
n++;
|
|
|
|
do
|
|
if ((*b++ = *o++) == '\\' && *o)
|
|
b[-1] = *o++;
|
|
while (*o && ! isspace ((unsigned char) *o));
|
|
|
|
*b++ = '\0';
|
|
}
|
|
}
|
|
|
|
/* Prepend the whitespace-separated options in OPTIONS to the argument
|
|
vector of a main program with argument count *PARGC and argument
|
|
vector *PARGV. */
|
|
void
|
|
prepend_default_options (options, pargc, pargv)
|
|
char const *options;
|
|
int *pargc;
|
|
char ***pargv;
|
|
{
|
|
if (options)
|
|
{
|
|
char *buf = xmalloc (strlen (options) + 1);
|
|
int prepended = prepend_args (options, buf, (char **) NULL);
|
|
int argc = *pargc;
|
|
char * const *argv = *pargv;
|
|
char **pp = (char **) xmalloc ((prepended + argc + 1) * sizeof *pp);
|
|
*pargc = prepended + argc;
|
|
*pargv = pp;
|
|
*pp++ = *argv++;
|
|
pp += prepend_args (options, buf, pp);
|
|
while ((*pp++ = *argv++))
|
|
continue;
|
|
}
|
|
}
|