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/* vi: set sw=4 ts=4: */
/*
* Utility routines.
*
* Copyright (C) tons of folks. Tracking down who wrote what
* isn't something I'm going to worry about... If you wrote something
* here, please feel free to acknowledge your work.
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Based in part on code from sash, Copyright (c) 1999 by David I. Bell
* Permission has been granted to redistribute this code under the GPL.
*
*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include "libbb.h"
#ifndef DMALLOC
extern void *xmalloc(size_t size)
{
void *ptr = malloc(size);
if (!ptr)
error_msg_and_die(memory_exhausted);
return ptr;
}
extern void *xrealloc(void *old, size_t size)
{
void *ptr;
/* SuS2 says "If size is 0 and ptr is not a null pointer, the
* object pointed to is freed." Do that here, in case realloc
* returns a NULL, since we don't want to choke in that case. */
if (size==0 && old) {
free(old);
return NULL;
}
ptr = realloc(old, size);
if (!ptr)
error_msg_and_die(memory_exhausted);
return ptr;
}
extern void *xcalloc(size_t nmemb, size_t size)
{
void *ptr = calloc(nmemb, size);
if (!ptr)
error_msg_and_die(memory_exhausted);
return ptr;
}
extern char * xstrdup (const char *s) {
char *t;
if (s == NULL)
return NULL;
t = strdup (s);
if (t == NULL)
error_msg_and_die(memory_exhausted);
return t;
}
#endif
extern char * xstrndup (const char *s, int n) {
char *t;
if (s == NULL)
error_msg_and_die("xstrndup bug");
t = xmalloc(++n);
return safe_strncpy(t,s,n);
}
FILE *xfopen(const char *path, const char *mode)
{
FILE *fp;
if ((fp = fopen(path, mode)) == NULL)
perror_msg_and_die("%s", path);
return fp;
}
/* END CODE */
/*
Local Variables:
c-file-style: "linux"
c-basic-offset: 4
tab-width: 4
End:
*/
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