dfcompat.c

   1 #ifndef HAVE_STRLCPY
   2
   3 /*
   4  * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
   5  *
   6  * Permission to use, copy, modify, and distribute this software for any
   7  * purpose with or without fee is hereby granted, provided that the above
   8  * copyright notice and this permission notice appear in all copies.
   9  *
  10  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  11  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  12  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  13  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  14  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  15  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  16  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  17  *
  18  * $OpenBSD: strlcpy.c,v 1.11 2006/05/05 15:27:38 millert Exp $
  19  * $FreeBSD: src/lib/libc/string/strlcpy.c,v 1.10 2008/10/19 10:11:35 delphij Exp $
  20  * $DragonFly: src/lib/libc/string/strlcpy.c,v 1.4 2005/09/18 16:32:34 asmodai Exp $
  21  */
  22
  23 #include "dfcompat.h"
  24
  25 #include <sys/types.h>
  26 #include <string.h>
  27
  28 /*
  29  * Copy src to string dst of size siz.  At most siz-1 characters
  30  * will be copied.  Always NUL terminates (unless siz == 0).
  31  * Returns strlen(src); if retval >= siz, truncation occurred.
  32  */
  33 size_t
  34 strlcpy(char *dst, const char *src, size_t siz)
  35 {
  36         char *d = dst;
  37         const char *s = src;
  38         size_t n = siz;
  39
  40         /* Copy as many bytes as will fit */
  41         if (n != 0) {
  42                 while (--n != 0) {
  43                         if ((*d++ = *s++) == '\0')
  44                                 break;
  45                 }
  46         }
  47
  48         /* Not enough room in dst, add NUL and traverse rest of src */
  49         if (n == 0) {
  50                 if (siz != 0)
  51                         *d = '\0';              /* NUL-terminate dst */
  52                 while (*s++)
  53                         ;
  54         }
  55
  56         return(s - src - 1);    /* count does not include NUL */
  57 }
  58
  59 #endif /* !HAVE_STRLCPY */
  60
  61 #ifndef HAVE_REALLOCF
  62
  63 /*-
  64  * Copyright (c) 1998, M. Warner Losh <imp@freebsd.org>
  65  * All rights reserved.
  66  *
  67  * Redistribution and use in source and binary forms, with or without
  68  * modification, are permitted provided that the following conditions
  69  * are met:
  70  * 1. Redistributions of source code must retain the above copyright
  71  *    notice, this list of conditions and the following disclaimer.
  72  * 2. Redistributions in binary form must reproduce the above copyright
  73  *    notice, this list of conditions and the following disclaimer in the
  74  *    documentation and/or other materials provided with the distribution.
  75  *
  76  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  77  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  78  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  79  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  80  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  81  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  82  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  83  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  84  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  85  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  86  * SUCH DAMAGE.
  87  *
  88  * $FreeBSD: src/lib/libc/stdlib/reallocf.c,v 1.3 1999/08/28 00:01:37 peter Exp $
  89  * $DragonFly: src/lib/libc/stdlib/reallocf.c,v 1.2 2003/06/17 04:26:46 dillon Exp $
  90  */
  91 #include <stdlib.h>
  92
  93 void *
  94 reallocf(void *ptr, size_t size)
  95 {
  96         void *nptr;
  97
  98         nptr = realloc(ptr, size);
  99         if (!nptr && ptr)
 100                 free(ptr);
 101         return (nptr);
 102 }
 103
 104 #endif /* !HAVE_REALLOCF */
 105
 106 #ifndef HAVE_GETPROGNAME
 107
 108 #ifdef __GLIBC__
 109
 110 #include <errno.h>
 111
 112 const char *
 113 getprogname(void)
 114 {
 115         return (program_invocation_short_name);
 116 }
 117
 118 #else /* __GLIBC__ */
 119 #error "no getprogname implementation available"
 120 #endif
 121
 122 #endif /* !HAVE_GETPROGNAME */