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Diffstat (limited to '')
| -rw-r--r-- | src/statx.c | 159 |
1 files changed, 159 insertions, 0 deletions
diff --git a/src/statx.c b/src/statx.c new file mode 100644 index 0000000..d4c8d0b --- /dev/null +++ b/src/statx.c @@ -0,0 +1,159 @@ +/* + * 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 */ |