1 /*- 2 * Copyright (c) 2006, 2008, 2009 3 * Thorsten Glaser <tg (at) mirbsd.org> 4 * Copyright (c) 1998 Todd C. Miller <Todd.Miller (at) 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 19 #include "sh.h" 20 21 __RCSID("$MirOS: src/bin/mksh/strlcpy.c,v 1.7 2009/06/10 18:12:50 tg Rel $"); 22 23 /* 24 * Copy src to string dst of size siz. At most siz-1 characters 25 * will be copied. Always NUL terminates (unless siz == 0). 26 * Returns strlen(src); if retval >= siz, truncation occurred. 27 */ 28 size_t 29 strlcpy(char *dst, const char *src, size_t siz) 30 { 31 const char *s = src; 32 33 if (siz == 0) 34 goto traverse_src; 35 36 /* copy as many chars as will fit */ 37 while (--siz && (*dst++ = *s++)) 38 ; 39 40 /* not enough room in dst */ 41 if (siz == 0) { 42 /* safe to NUL-terminate dst since we copied <= siz-1 chars */ 43 *dst = '\0'; 44 traverse_src: 45 /* traverse rest of src */ 46 while (*s++) 47 ; 48 } 49 50 /* count does not include NUL */ 51 return ((size_t)(s - src - 1)); 52 } 53
