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/* $NetBSD: strlcpy.c,v 1.3 2007/06/04 18:19:27 christos Exp $ */ /* $OpenBSD: strlcpy.c,v 1.7 2003/04/12 21:56:39 millert Exp $ */ /* * Copyright (c) 1998 Todd C. Miller <[email protected]> * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND TODD C. MILLER DISCLAIMS ALL * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL TODD C. MILLER BE LIABLE * FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #include "config.h" #if defined(LIBC_SCCS) && !defined(lint) __RCSID("$NetBSD: strlcpy.c,v 1.3 2007/06/04 18:19:27 christos Exp $"); #endif /* LIBC_SCCS and not lint */ #include <sys/types.h> #include <assert.h> #include <string.h> #ifdef _LIBC # ifdef __weak_alias __weak_alias(strlcpy, _strlcpy) # endif #endif #if !HAVE_STRLCPY /* * Copy src to string dst of size siz. At most siz-1 characters * will be copied. Always NUL terminates (unless siz == 0). * Returns strlen(src); if retval >= siz, truncation occurred. */ size_t strlcpy(char *dst, const char *src, size_t siz) { char *d = dst; const char *s = src; size_t n = siz; _DIAGASSERT(dst != NULL); _DIAGASSERT(src != NULL); /* Copy as many bytes as will fit */ if (n != 0 && --n != 0) { do { if ((*d++ = *s++) == 0) break; } while (--n != 0); } /* Not enough room in dst, add NUL and traverse rest of src */ if (n == 0) { if (siz != 0) *d = '\0'; /* NUL-terminate dst */ while (*s++) ; } return(s - src - 1); /* count does not include NUL */ } #endif