sortix-mirror/libc/unistd/getcwd.c

41 lines
1.2 KiB
C

/*
* Copyright (c) 2011, 2012, 2014 Jonas 'Sortie' Termansen.
*
* 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 THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR 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.
*
* unistd/getcwd.c
* Returns the current working directory.
*/
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
char* getcwd(char* buf, size_t size)
{
char* cwd = canonicalize_file_name(".");
if ( !cwd )
return NULL;
if ( !buf )
return cwd;
if ( size <= strlcpy(buf, cwd, size) )
{
free(cwd);
errno = ERANGE;
return NULL;
}
free(cwd);
return buf;
}