utils.c
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/*
* Copyright 1999-2008 by Marco d'Itri <md@linux.it>.
*
* do_nofail and merge_args come from the module-init-tools package.
* Copyright 2001 by Rusty Russell.
* Copyright 2002, 2003 by Rusty Russell, IBM Corporation.
*
* 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 of the License, 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
/* for strdup */
#define _XOPEN_SOURCE 500
/* System library */
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include <errno.h>
/* Application-specific */
#include "utils.h"
void *do_nofail(void *ptr, const char *file, const int line)
{
if (ptr)
return ptr;
err_quit("Memory allocation failure at %s:%d.", file, line);
}
/* Prepend options from a string. */
char **merge_args(char *args, char *argv[], int *argc)
{
char *arg, *argstring;
char **newargs = NULL;
unsigned int i, num_env = 0;
if (!args)
return argv;
argstring = NOFAIL(strdup(args));
for (arg = strtok(argstring, " "); arg; arg = strtok(NULL, " ")) {
num_env++;
newargs = NOFAIL(realloc(newargs,
sizeof(newargs[0]) * (num_env + *argc + 1)));
newargs[num_env] = arg;
}
if (!newargs)
return argv;
/* Append commandline args */
newargs[0] = argv[0];
for (i = 1; i <= *argc; i++)
newargs[num_env + i] = argv[i];
*argc += num_env;
return newargs;
}
/* Error routines */
void err_sys(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
vfprintf(stderr, fmt, ap);
fprintf(stderr, ": %s\n", strerror(errno));
va_end(ap);
exit(2);
}
void err_quit(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
vfprintf(stderr, fmt, ap);
fputs("\n", stderr);
va_end(ap);
exit(2);
}