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/* $OpenBSD: getcwd.c,v 1.21 2016/05/07 19:48:00 guenther Exp $ */ |
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/* |
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* Copyright (c) 2005 Marius Eriksen <marius@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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#include <errno.h> |
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#include <limits.h> |
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#include <stdlib.h> |
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#include <unistd.h> |
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int __getcwd(char *buf, size_t len); |
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PROTO_NORMAL(__getcwd); |
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char * |
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getcwd(char *buf, size_t size) |
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{ |
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char *allocated = NULL; |
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if (buf != NULL && size == 0) { |
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errno = EINVAL; |
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return (NULL); |
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} |
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if (buf == NULL && |
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(allocated = buf = malloc(size = PATH_MAX)) == NULL) |
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return (NULL); |
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if (__getcwd(buf, size) == -1) { |
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free(allocated); |
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return (NULL); |
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} |
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return (buf); |
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} |
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DEF_WEAK(getcwd); |