diff options
Diffstat (limited to 'src/basic/xattr-util.c')
| -rw-r--r-- | src/basic/xattr-util.c | 200 |
1 files changed, 0 insertions, 200 deletions
diff --git a/src/basic/xattr-util.c b/src/basic/xattr-util.c deleted file mode 100644 index 8256899eda..0000000000 --- a/src/basic/xattr-util.c +++ /dev/null @@ -1,200 +0,0 @@ -/*** - This file is part of systemd. - - Copyright 2010 Lennart Poettering - - systemd 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. - - systemd 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 systemd; If not, see <http://www.gnu.org/licenses/>. -***/ - -#include <errno.h> -#include <fcntl.h> -#include <stdint.h> -#include <stdlib.h> -#include <string.h> -#include <sys/time.h> -#include <sys/xattr.h> - -#include "alloc-util.h" -#include "fd-util.h" -#include "macro.h" -#include "sparse-endian.h" -#include "stdio-util.h" -#include "time-util.h" -#include "xattr-util.h" - -int getxattr_malloc(const char *path, const char *name, char **value, bool allow_symlink) { - char *v; - size_t l; - ssize_t n; - - assert(path); - assert(name); - assert(value); - - for (l = 100; ; l = (size_t) n + 1) { - v = new0(char, l); - if (!v) - return -ENOMEM; - - if (allow_symlink) - n = lgetxattr(path, name, v, l); - else - n = getxattr(path, name, v, l); - - if (n >= 0 && (size_t) n < l) { - *value = v; - return n; - } - - free(v); - - if (n < 0 && errno != ERANGE) - return -errno; - - if (allow_symlink) - n = lgetxattr(path, name, NULL, 0); - else - n = getxattr(path, name, NULL, 0); - if (n < 0) - return -errno; - } -} - -int fgetxattr_malloc(int fd, const char *name, char **value) { - char *v; - size_t l; - ssize_t n; - - assert(fd >= 0); - assert(name); - assert(value); - - for (l = 100; ; l = (size_t) n + 1) { - v = new0(char, l); - if (!v) - return -ENOMEM; - - n = fgetxattr(fd, name, v, l); - - if (n >= 0 && (size_t) n < l) { - *value = v; - return n; - } - - free(v); - - if (n < 0 && errno != ERANGE) - return -errno; - - n = fgetxattr(fd, name, NULL, 0); - if (n < 0) - return -errno; - } -} - -ssize_t fgetxattrat_fake(int dirfd, const char *filename, const char *attribute, void *value, size_t size, int flags) { - char fn[strlen("/proc/self/fd/") + DECIMAL_STR_MAX(int) + 1]; - _cleanup_close_ int fd = -1; - ssize_t l; - - /* The kernel doesn't have a fgetxattrat() command, hence let's emulate one */ - - fd = openat(dirfd, filename, O_CLOEXEC|O_PATH|(flags & AT_SYMLINK_NOFOLLOW ? O_NOFOLLOW : 0)); - if (fd < 0) - return -errno; - - xsprintf(fn, "/proc/self/fd/%i", fd); - - l = getxattr(fn, attribute, value, size); - if (l < 0) - return -errno; - - return l; -} - -static int parse_crtime(le64_t le, usec_t *usec) { - uint64_t u; - - assert(usec); - - u = le64toh(le); - if (u == 0 || u == (uint64_t) -1) - return -EIO; - - *usec = (usec_t) u; - return 0; -} - -int fd_getcrtime(int fd, usec_t *usec) { - le64_t le; - ssize_t n; - - assert(fd >= 0); - assert(usec); - - /* Until Linux gets a real concept of birthtime/creation time, - * let's fake one with xattrs */ - - n = fgetxattr(fd, "user.crtime_usec", &le, sizeof(le)); - if (n < 0) - return -errno; - if (n != sizeof(le)) - return -EIO; - - return parse_crtime(le, usec); -} - -int fd_getcrtime_at(int dirfd, const char *name, usec_t *usec, int flags) { - le64_t le; - ssize_t n; - - n = fgetxattrat_fake(dirfd, name, "user.crtime_usec", &le, sizeof(le), flags); - if (n < 0) - return -errno; - if (n != sizeof(le)) - return -EIO; - - return parse_crtime(le, usec); -} - -int path_getcrtime(const char *p, usec_t *usec) { - le64_t le; - ssize_t n; - - assert(p); - assert(usec); - - n = getxattr(p, "user.crtime_usec", &le, sizeof(le)); - if (n < 0) - return -errno; - if (n != sizeof(le)) - return -EIO; - - return parse_crtime(le, usec); -} - -int fd_setcrtime(int fd, usec_t usec) { - le64_t le; - - assert(fd >= 0); - - if (usec <= 0) - usec = now(CLOCK_REALTIME); - - le = htole64((uint64_t) usec); - if (fsetxattr(fd, "user.crtime_usec", &le, sizeof(le), 0) < 0) - return -errno; - - return 0; -} |