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/* Determine current working directory. FreeBSD version.
Copyright (C) 2002 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Bruno Haible <bruno@clisp.org>, 2002.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <errno.h>
#include <limits.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sysdep.h>
/* If we compile the file for use in ld.so we don't need the feature
that getcwd() allocates the buffers itself. */
#if IS_IN (rtld)
# define NO_ALLOCATION 1
#endif
/* The system calls only makes a lookup in the VFS cache, which can easily
fail. Therefore we use the generic version as a fallback. */
extern int __syscall_getcwd (char *buf, unsigned int size);
libc_hidden_proto (__syscall_getcwd)
static char *generic_getcwd (char *buf, size_t size) internal_function;
char *
__getcwd (char *buf, size_t size)
{
char tmpbuf[PATH_MAX];
if (INLINE_SYSCALL (getcwd, 2, tmpbuf, PATH_MAX) >= 0)
{
size_t len = strlen (tmpbuf) + 1;
if (size == 0)
{
if (__builtin_expect (buf != NULL, 0))
{
__set_errno (EINVAL);
return NULL;
}
#ifdef NO_ALLOCATION
buf = NULL;
#else
buf = (char *) malloc (len);
#endif
if (__builtin_expect (buf == NULL, 0))
{
__set_errno (ENOMEM);
return NULL;
}
}
else
{
if (size < len)
{
__set_errno (ERANGE);
return NULL;
}
if (buf == NULL)
{
#ifdef NO_ALLOCATION
buf = NULL;
#else
buf = (char *) malloc (size);
#endif
if (__builtin_expect (buf == NULL, 0))
{
__set_errno (ENOMEM);
return NULL;
}
}
}
memcpy (buf, tmpbuf, len);
return buf;
}
return generic_getcwd (buf, size);
}
weak_alias (__getcwd, getcwd)
/* Get the code for the generic version. */
#define GETCWD_RETURN_TYPE static char * internal_function
#define __getcwd generic_getcwd
#include <sysdeps/posix/getcwd.c>
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