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/*
* Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org>
*
* Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
*/
/* These functions find the absolute path to the current working directory. */
#include <stdlib.h>
#include <errno.h>
#include <sys/stat.h>
#include <dirent.h>
#include <string.h>
#include <unistd.h>
#include <sys/param.h>
#include <sys/syscall.h>
# define __NR___syscall_getcwd __NR_getcwd
static __always_inline
_syscall2(int, __syscall_getcwd, char *, buf, unsigned long, size)
char *getcwd(char *buf, size_t size)
{
int ret;
char *path;
size_t alloc_size = size;
if (size == 0) {
if (buf != NULL) {
__set_errno(EINVAL);
return NULL;
}
alloc_size = MAX (PATH_MAX, getpagesize ());
}
path=buf;
if (buf == NULL) {
path = malloc(alloc_size);
if (path == NULL)
return NULL;
}
ret = __syscall_getcwd(path, alloc_size);
if (ret > 0 && path[0] == '/')
{
if (buf == NULL && size == 0)
buf = realloc(path, ret);
if (buf == NULL)
buf = path;
return buf;
}
if (buf == NULL)
free (path);
return NULL;
}
libc_hidden_def(getcwd)
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