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/* Determine current working directory. OpenSolaris version.
Copyright (C) 1997,1998,1999,2000,2002,2003,2006,2008
Free Software Foundation, Inc.
This file is part of the GNU C Library.
Based on Linux version contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
OpenSolaris bits contributed by David Bartley
<dtbartle@csclub.uwaterloo.ca>, 2008.
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 <inline-syscall.h>
#include <errno.h>
#include <unistd.h>
#include <stddef.h>
#include <limits.h>
#include <memory.h>
#include <signal.h>
#include <assert.h>
#include <bits/libc-lock.h>
DECLARE_INLINE_SYSCALL (int, getcwd, char *buf, size_t buflen);
#ifndef MAX
# define MAX(a, b) ((a) < (b) ? (b) : (a))
#endif
/* If we compile the file for use in ld.so we don't need the feature
that getcwd() allocates the buffers itself. */
#ifdef IS_IN_rtld
# define NO_ALLOCATION 1
#endif
char *
__getcwd (char *buf, size_t size)
{
char *path;
#ifndef NO_ALLOCATION
size_t alloc_size = size;
if (size == 0)
{
if (buf != NULL)
{
__set_errno (EINVAL);
return NULL;
}
alloc_size = MAX (PATH_MAX, __getpagesize ());
}
if (buf == NULL)
{
path = malloc (alloc_size);
if (path == NULL)
return NULL;
}
else
#else
# define alloc_size size
#endif
path = buf;
if (INLINE_SYSCALL (getcwd, 2, CHECK_STRING (path), alloc_size) == -1)
{
if (buf == NULL && path != NULL)
free(path);
path = NULL;
}
return path;
}
weak_alias (__getcwd, getcwd)
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