xfuncs.c

  1 /* vi: set sw=4 ts=4: */
  2 /*
  3  * Utility routines.
  4  *
  5  * Copyright (C) 1999,2000,2001 by Erik Andersen <andersee@debian.org>
  6  *
  7  * This program is free software; you can redistribute it and/or modify
  8  * it under the terms of the GNU General Public License as published by
  9  * the Free Software Foundation; either version 2 of the License, or
 10  * (at your option) any later version.
 11  *
 12  * This program is distributed in the hope that it will be useful,
 13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
 14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 15  * General Public License for more details.
 16  *
 17  * You should have received a copy of the GNU General Public License
 18  * along with this program; if not, write to the Free Software
 19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 20  */
 21 
 22 #include <stdio.h>
 23 #include <string.h>
 24 #include <stdlib.h>
 25 #include <unistd.h>
 26 #include "libbb.h"
 27 
 28 extern void *xmalloc(size_t size)
 29 {
 30         void *ptr = malloc(size);
 31         if (ptr == NULL && size != 0)
 32                 perror_msg_and_die("malloc");
 33         return ptr;
 34 }
 35 
 36 extern void *xrealloc(void *ptr, size_t size)
 37 {
 38         ptr = realloc(ptr, size);
 39         if (ptr == NULL && size != 0)
 40                 perror_msg_and_die("realloc");
 41         return ptr;
 42 }
 43 
 44 extern void *xcalloc(size_t nmemb, size_t size)
 45 {
 46         void *ptr = calloc(nmemb, size);
 47         if (ptr == NULL && nmemb != 0 && size != 0)
 48                 perror_msg_and_die("calloc");
 49         return ptr;
 50 }
 51 
 52 extern char *xstrdup(const char *s)
 53 {
 54         char *t;
 55 
 56         if (s == NULL)
 57                 return NULL;
 58 
 59         t = strdup(s);
 60 
 61         if (t == NULL)
 62                 perror_msg_and_die("strdup");
 63 
 64         return t;
 65 }
 66 
 67 extern char *xstrndup(const char *s, int n)
 68 {
 69         char *t;
 70 
 71         if (s == NULL)
 72                 error_msg_and_die("xstrndup bug");
 73 
 74         t = xmalloc(++n);
 75 
 76         return safe_strncpy(t, s, n);
 77 }
 78 
 79 FILE *xfopen(const char *path, const char *mode)
 80 {
 81         FILE *fp;
 82         if ((fp = fopen(path, mode)) == NULL)
 83                 perror_msg_and_die("%s", path);
 84         return fp;
 85 }
 86 
 87 /* END CODE */
 88 /*
 89 Local Variables:
 90 c-file-style: "linux"
 91 c-basic-offset: 4
 92 tab-width: 4
 93 End:
 94 */
 95
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Sources/opkg-lede/libbb/xfuncs.c
