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/*
* statx.c - Map modern statx(2) system call to older stat(2), lstat(2),
* and fstat(2) replacements named {,l,f}statn()
*
* Copyright (C) 2018 Werner Fink
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef _GNU_SOURCE
#define _GNU_SOURCE
#endif
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <sys/sysmacros.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <unistd.h>
#include <fcntl.h> /* Definition of AT_* constants */
int stat_flags = AT_NO_AUTOMOUNT|AT_STATX_DONT_SYNC;
#ifdef WITH_STATX
#include <errno.h>
#ifndef HAVE_STATX
# define _ASM_GENERIC_FCNTL_H /* Avoid collisions between asm/fcntl.h and bits/fcntl.h ! */
# include <linux/fcntl.h> /* Definition of AT_* and AT_STATX_* constants ! */
#endif
#include <sys/stat.h>
#ifndef HAVE_STATX
# ifndef STATX_TYPE
# include <linux/stat.h> /* Provides 'struct statx' and STATX_* ! */
# endif
#endif
int statn(const char *pathname, unsigned int mask, struct stat *st)
{
int flags = stat_flags;
int dirfd = pathname && *pathname == '/' ? 0 : AT_FDCWD;
int ret;
struct statx stx;
#ifndef HAVE_STATX
ret = syscall(SYS_statx, dirfd, pathname, flags, mask, &stx);
#else
ret = statx(dirfd, pathname, flags, mask, &stx);
#endif
if (ret >= 0) {
st->st_dev = makedev(stx.stx_dev_major, stx.stx_dev_minor);
st->st_rdev = makedev(stx.stx_rdev_major, stx.stx_rdev_minor);
st->st_ino = stx.stx_ino;
st->st_mode = stx.stx_mode;
st->st_nlink = stx.stx_nlink;
st->st_uid = stx.stx_uid;
st->st_gid = stx.stx_gid;
st->st_size = stx.stx_size;
st->st_blksize = stx.stx_blksize;
st->st_blocks = stx.stx_blocks;
st->st_atim.tv_sec = stx.stx_atime.tv_sec;
st->st_atim.tv_nsec = stx.stx_atime.tv_nsec;
st->st_mtim.tv_sec = stx.stx_mtime.tv_sec;
st->st_mtim.tv_nsec = stx.stx_mtime.tv_nsec;
st->st_ctim.tv_sec = stx.stx_ctime.tv_sec;
st->st_ctim.tv_nsec = stx.stx_ctime.tv_nsec;
} else if (errno==ENOSYS || errno==EINVAL)
return stat(pathname, st);
return ret;
}
int fstatn(int fd, unsigned int mask, struct stat *st)
{
int flags = AT_EMPTY_PATH|stat_flags;
int ret;
struct statx stx;
#ifndef HAVE_STATX
ret = syscall(SYS_statx, fd, "", flags, mask, &stx);
#else
ret = statx(fd, "", flags, mask, &stx);
#endif
if (ret >= 0) {
st->st_dev = makedev(stx.stx_dev_major, stx.stx_dev_minor);
st->st_rdev = makedev(stx.stx_rdev_major, stx.stx_rdev_minor);
st->st_ino = stx.stx_ino;
st->st_mode = stx.stx_mode;
st->st_nlink = stx.stx_nlink;
st->st_uid = stx.stx_uid;
st->st_gid = stx.stx_gid;
st->st_size = stx.stx_size;
st->st_blksize = stx.stx_blksize;
st->st_blocks = stx.stx_blocks;
st->st_atim.tv_sec = stx.stx_atime.tv_sec;
st->st_atim.tv_nsec = stx.stx_atime.tv_nsec;
st->st_mtim.tv_sec = stx.stx_mtime.tv_sec;
st->st_mtim.tv_nsec = stx.stx_mtime.tv_nsec;
st->st_ctim.tv_sec = stx.stx_ctime.tv_sec;
st->st_ctim.tv_nsec = stx.stx_ctime.tv_nsec;
} else if (errno==ENOSYS || errno==EINVAL)
return fstat(fd, st);
return ret;
}
int lstatn(const char *pathname, unsigned int mask, struct stat *st)
{
int flags = AT_SYMLINK_NOFOLLOW|stat_flags;
int dirfd = pathname && *pathname == '/' ? 0 : AT_FDCWD;
int ret;
struct statx stx;
#ifndef HAVE_STATX
ret = syscall(SYS_statx, dirfd, pathname, flags, mask, &stx);
#else
ret = statx(dirfd, pathname, flags, mask, &stx);
#endif
if (ret >= 0) {
st->st_dev = makedev(stx.stx_dev_major, stx.stx_dev_minor);
st->st_rdev = makedev(stx.stx_rdev_major, stx.stx_rdev_minor);
st->st_ino = stx.stx_ino;
st->st_mode = stx.stx_mode;
st->st_nlink = stx.stx_nlink;
st->st_uid = stx.stx_uid;
st->st_gid = stx.stx_gid;
st->st_size = stx.stx_size;
st->st_blksize = stx.stx_blksize;
st->st_blocks = stx.stx_blocks;
st->st_atim.tv_sec = stx.stx_atime.tv_sec;
st->st_atim.tv_nsec = stx.stx_atime.tv_nsec;
st->st_mtim.tv_sec = stx.stx_mtime.tv_sec;
st->st_mtim.tv_nsec = stx.stx_mtime.tv_nsec;
st->st_ctim.tv_sec = stx.stx_ctime.tv_sec;
st->st_ctim.tv_nsec = stx.stx_ctime.tv_nsec;
} else if (errno==ENOSYS || errno==EINVAL)
return lstat(pathname, st);
return ret;
}
#endif /* WITH_STATX */
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