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