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util-lib: split out file attribute calls to chattr-util.[ch]
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@ -797,6 +797,8 @@ libbasic_la_SOURCES = \
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src/basic/dirent-util.h \
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src/basic/xattr-util.c \
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src/basic/xattr-util.h \
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src/basic/chattr-util.c \
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src/basic/chattr-util.h \
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src/basic/mount-util.c \
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src/basic/mount-util.h \
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src/basic/hexdecoct.c \
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107
src/basic/chattr-util.c
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107
src/basic/chattr-util.c
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@ -0,0 +1,107 @@
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/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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/***
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This file is part of systemd.
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Copyright 2010 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <sys/ioctl.h>
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#include <sys/stat.h>
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#include <linux/fs.h>
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#include "chattr-util.h"
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#include "fd-util.h"
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#include "util.h"
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int chattr_fd(int fd, unsigned value, unsigned mask) {
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unsigned old_attr, new_attr;
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struct stat st;
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assert(fd >= 0);
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if (fstat(fd, &st) < 0)
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return -errno;
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/* Explicitly check whether this is a regular file or
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* directory. If it is anything else (such as a device node or
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* fifo), then the ioctl will not hit the file systems but
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* possibly drivers, where the ioctl might have different
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* effects. Notably, DRM is using the same ioctl() number. */
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if (!S_ISDIR(st.st_mode) && !S_ISREG(st.st_mode))
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return -ENOTTY;
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if (mask == 0)
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return 0;
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if (ioctl(fd, FS_IOC_GETFLAGS, &old_attr) < 0)
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return -errno;
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new_attr = (old_attr & ~mask) | (value & mask);
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if (new_attr == old_attr)
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return 0;
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if (ioctl(fd, FS_IOC_SETFLAGS, &new_attr) < 0)
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return -errno;
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return 1;
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}
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int chattr_path(const char *p, unsigned value, unsigned mask) {
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_cleanup_close_ int fd = -1;
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assert(p);
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if (mask == 0)
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return 0;
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fd = open(p, O_RDONLY|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW);
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if (fd < 0)
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return -errno;
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return chattr_fd(fd, value, mask);
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}
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int read_attr_fd(int fd, unsigned *ret) {
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struct stat st;
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assert(fd >= 0);
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if (fstat(fd, &st) < 0)
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return -errno;
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if (!S_ISDIR(st.st_mode) && !S_ISREG(st.st_mode))
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return -ENOTTY;
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if (ioctl(fd, FS_IOC_GETFLAGS, ret) < 0)
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return -errno;
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return 0;
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}
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int read_attr_path(const char *p, unsigned *ret) {
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_cleanup_close_ int fd = -1;
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assert(p);
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assert(ret);
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fd = open(p, O_RDONLY|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW);
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if (fd < 0)
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return -errno;
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return read_attr_fd(fd, ret);
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}
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28
src/basic/chattr-util.h
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28
src/basic/chattr-util.h
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@ -0,0 +1,28 @@
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/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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#pragma once
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/***
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This file is part of systemd.
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Copyright 2010 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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int chattr_fd(int fd, unsigned value, unsigned mask);
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int chattr_path(const char *p, unsigned value, unsigned mask);
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int read_attr_fd(int fd, unsigned *ret);
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int read_attr_path(const char *p, unsigned *ret);
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@ -23,6 +23,7 @@
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#include <sys/xattr.h>
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#include "btrfs-util.h"
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#include "chattr-util.h"
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#include "copy.h"
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#include "dirent-util.h"
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#include "fd-util.h"
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@ -1962,85 +1962,6 @@ int is_device_node(const char *path) {
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return !!(S_ISBLK(info.st_mode) || S_ISCHR(info.st_mode));
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}
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int chattr_fd(int fd, unsigned value, unsigned mask) {
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unsigned old_attr, new_attr;
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struct stat st;
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assert(fd >= 0);
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if (fstat(fd, &st) < 0)
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return -errno;
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/* Explicitly check whether this is a regular file or
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* directory. If it is anything else (such as a device node or
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* fifo), then the ioctl will not hit the file systems but
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* possibly drivers, where the ioctl might have different
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* effects. Notably, DRM is using the same ioctl() number. */
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if (!S_ISDIR(st.st_mode) && !S_ISREG(st.st_mode))
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return -ENOTTY;
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if (mask == 0)
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return 0;
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if (ioctl(fd, FS_IOC_GETFLAGS, &old_attr) < 0)
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return -errno;
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new_attr = (old_attr & ~mask) | (value & mask);
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if (new_attr == old_attr)
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return 0;
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if (ioctl(fd, FS_IOC_SETFLAGS, &new_attr) < 0)
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return -errno;
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return 1;
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}
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int chattr_path(const char *p, unsigned value, unsigned mask) {
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_cleanup_close_ int fd = -1;
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assert(p);
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if (mask == 0)
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return 0;
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fd = open(p, O_RDONLY|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW);
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if (fd < 0)
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return -errno;
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return chattr_fd(fd, value, mask);
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}
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int read_attr_fd(int fd, unsigned *ret) {
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struct stat st;
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assert(fd >= 0);
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if (fstat(fd, &st) < 0)
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return -errno;
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if (!S_ISDIR(st.st_mode) && !S_ISREG(st.st_mode))
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return -ENOTTY;
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if (ioctl(fd, FS_IOC_GETFLAGS, ret) < 0)
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return -errno;
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return 0;
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}
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int read_attr_path(const char *p, unsigned *ret) {
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_cleanup_close_ int fd = -1;
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assert(p);
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assert(ret);
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fd = open(p, O_RDONLY|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW);
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if (fd < 0)
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return -errno;
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return read_attr_fd(fd, ret);
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}
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int syslog_parse_priority(const char **p, int *priority, bool with_facility) {
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int a = 0, b = 0, c = 0;
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int k;
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@ -500,12 +500,6 @@ union inotify_event_buffer {
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#define laccess(path, mode) faccessat(AT_FDCWD, (path), (mode), AT_SYMLINK_NOFOLLOW)
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int chattr_fd(int fd, unsigned value, unsigned mask);
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int chattr_path(const char *p, unsigned value, unsigned mask);
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int read_attr_fd(int fd, unsigned *ret);
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int read_attr_path(const char *p, unsigned *ret);
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int syslog_parse_priority(const char **p, int *priority, bool with_facility);
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int rename_noreplace(int olddirfd, const char *oldpath, int newdirfd, const char *newpath);
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@ -25,6 +25,7 @@
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#include "sd-event.h"
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#include "btrfs-util.h"
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#include "chattr-util.h"
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#include "copy.h"
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#include "fd-util.h"
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#include "fileio.h"
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@ -26,6 +26,7 @@
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#include "sd-daemon.h"
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#include "btrfs-util.h"
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#include "chattr-util.h"
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#include "copy.h"
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#include "curl-util.h"
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#include "fd-util.h"
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@ -29,6 +29,7 @@
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#include <unistd.h>
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#include "btrfs-util.h"
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#include "chattr-util.h"
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#include "compress.h"
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#include "fd-util.h"
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#include "journal-authenticate.h"
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@ -42,6 +42,7 @@
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#include "bus-error.h"
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#include "bus-util.h"
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#include "catalog.h"
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#include "chattr-util.h"
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#include "fd-util.h"
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#include "fileio.h"
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#include "fsprg.h"
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@ -24,6 +24,7 @@
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#include <sys/statfs.h>
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#include "btrfs-util.h"
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#include "chattr-util.h"
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#include "copy.h"
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#include "dirent-util.h"
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#include "fd-util.h"
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@ -41,6 +41,7 @@
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#include "acl-util.h"
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#include "btrfs-util.h"
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#include "capability.h"
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#include "chattr-util.h"
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#include "conf-files.h"
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#include "copy.h"
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#include "escape.h"
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