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54 lines
1.6 KiB
54 lines
1.6 KiB
/* $OpenBSD: strlcpy.c,v 1.16 2019/01/25 00:19:25 millert Exp $ */ |
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/* |
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* Copyright (c) 1998, 2015 Todd C. Miller <millert@openbsd.org> |
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* |
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* Permission to use, copy, modify, and distribute this software for any |
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* purpose with or without fee is hereby granted, provided that the above |
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* copyright notice and this permission notice appear in all copies. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
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*/ |
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#ifndef OpenBSD |
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#include <sys/types.h> |
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#include <string.h> |
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/* |
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* Copy string src to buffer dst of size dsize. At most dsize-1 |
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* chars will be copied. Always NUL terminates (unless dsize == 0). |
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* Returns strlen(src); if retval >= dsize, truncation occurred. |
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*/ |
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size_t |
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strlcpy(char *dst, const char *src, size_t dsize) |
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{ |
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const char *osrc = src; |
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size_t nleft = dsize; |
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/* Copy as many bytes as will fit. */ |
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if (nleft != 0) { |
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while (--nleft != 0) { |
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if ((*dst++ = *src++) == '\0') |
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break; |
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} |
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} |
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/* Not enough room in dst, add NUL and traverse rest of src. */ |
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if (nleft == 0) { |
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if (dsize != 0) |
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*dst = '\0'; /* NUL-terminate dst */ |
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while (*src++) |
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; |
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} |
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return(src - osrc - 1); /* count does not include NUL */ |
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} |
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#endif
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