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113 lines
2.4 KiB
C
113 lines
2.4 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Utility routines.
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*
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* Copyright (C) tons of folks. Tracking down who wrote what
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* isn't something I'm going to worry about... If you wrote something
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* here, please feel free to acknowledge your work.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* Based in part on code from sash, Copyright (c) 1999 by David I. Bell
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* Permission has been granted to redistribute this code under the GPL.
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*
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*/
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include "libbb.h"
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#ifndef DMALLOC
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extern void *xmalloc(size_t size)
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{
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void *ptr = malloc(size);
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if (!ptr)
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error_msg_and_die(memory_exhausted);
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return ptr;
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}
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extern void *xrealloc(void *old, size_t size)
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{
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void *ptr;
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/* SuS2 says "If size is 0 and ptr is not a null pointer, the
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* object pointed to is freed." Do that here, in case realloc
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* returns a NULL, since we don't want to choke in that case. */
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if (size==0 && old) {
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free(old);
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return NULL;
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}
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ptr = realloc(old, size);
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if (!ptr)
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error_msg_and_die(memory_exhausted);
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return ptr;
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}
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extern void *xcalloc(size_t nmemb, size_t size)
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{
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void *ptr = calloc(nmemb, size);
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if (!ptr)
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error_msg_and_die(memory_exhausted);
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return ptr;
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}
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extern char * xstrdup (const char *s) {
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char *t;
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if (s == NULL)
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return NULL;
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t = strdup (s);
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if (t == NULL)
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error_msg_and_die(memory_exhausted);
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return t;
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}
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#endif
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extern char * xstrndup (const char *s, int n) {
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char *t;
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if (s == NULL)
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error_msg_and_die("xstrndup bug");
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t = xmalloc(++n);
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return safe_strncpy(t,s,n);
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}
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FILE *xfopen(const char *path, const char *mode)
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{
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FILE *fp;
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if ((fp = fopen(path, mode)) == NULL)
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perror_msg_and_die("%s", path);
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return fp;
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}
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/* END CODE */
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/*
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Local Variables:
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c-file-style: "linux"
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c-basic-offset: 4
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tab-width: 4
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End:
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*/
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