From e6c1a2bde7609cc703a5fad34c3bc1d15d19bbdc Mon Sep 17 00:00:00 2001 From: Kay Sievers Date: Wed, 20 May 2009 18:58:52 +0200 Subject: use openat(), unlinkat(), fstatat() --- TODO | 1 - udev/lib/libudev-queue.c | 7 ++----- udev/udev-rules.c | 6 ++---- udev/udev-watch.c | 20 +++++++++----------- udev/udevadm-info.c | 5 ++--- udev/udevd.c | 3 +-- 6 files changed, 16 insertions(+), 26 deletions(-) diff --git a/TODO b/TODO index 541faea556..161df02f05 100644 --- a/TODO +++ b/TODO @@ -2,7 +2,6 @@ o drop modprobe floppy alias (SUSE), it will be in the module (2.6.30) o remove MMC rules, they got a modalias now (2.6.30) o add scsi:t-0x09* to "ch" and remove modprobe rule (2.6.30) - o convert readdir loops to unlinkat(), fstatat() o implement path_id in C with libudev (?) o convert firmware.sh to C (?) diff --git a/udev/lib/libudev-queue.c b/udev/lib/libudev-queue.c index a2860ec8c2..8dce6c314d 100644 --- a/udev/lib/libudev-queue.c +++ b/udev/lib/libudev-queue.c @@ -201,7 +201,6 @@ struct udev_list_entry *udev_queue_get_queued_list_entry(struct udev_queue *udev if (dir == NULL) return NULL; for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) { - char filename[UTIL_PATH_SIZE]; char syspath[UTIL_PATH_SIZE]; char *s; size_t l; @@ -209,10 +208,9 @@ struct udev_list_entry *udev_queue_get_queued_list_entry(struct udev_queue *udev if (dent->d_name[0] == '.') continue; - util_strscpyl(filename, sizeof(filename), path, "/", dent->d_name, NULL); s = syspath; l = util_strpcpyl(&s, sizeof(syspath), udev_get_sys_path(udev_queue->udev), NULL); - len = readlink(filename, s, l); + len = readlinkat(dirfd(dir), dent->d_name, s, l); if (len < 0 || (size_t)len >= l) continue; s[len] = '\0'; @@ -246,10 +244,9 @@ struct udev_list_entry *udev_queue_get_failed_list_entry(struct udev_queue *udev if (dent->d_name[0] == '.') continue; - util_strscpyl(filename, sizeof(filename), path, "/", dent->d_name, NULL); s = syspath; l = util_strpcpyl(&s, sizeof(syspath), udev_get_sys_path(udev_queue->udev), NULL); - len = readlink(filename, s, l); + len = readlinkat(dirfd(dir), dent->d_name, s, l); if (len < 0 || (size_t)len >= l) continue; s[len] = '\0'; diff --git a/udev/udev-rules.c b/udev/udev-rules.c index da1d322037..6d03ab63c0 100644 --- a/udev/udev-rules.c +++ b/udev/udev-rules.c @@ -1641,10 +1641,8 @@ static int add_matching_files(struct udev *udev, struct udev_list_node *file_lis if (strcmp(ext, suffix) != 0) continue; } - dbg(udev, "put file '%s/%s' into list\n", dirname, dent->d_name); - - snprintf(filename, sizeof(filename), "%s/%s", dirname, dent->d_name); - filename[sizeof(filename)-1] = '\0'; + util_strscpyl(filename, sizeof(filename), dirname, "/", dent->d_name, NULL); + dbg(udev, "put file '%s' into list\n", filename); udev_list_entry_add(udev, file_list, filename, NULL, 1, 1); } diff --git a/udev/udev-watch.c b/udev/udev-watch.c index 8bc8775735..53492e5f35 100644 --- a/udev/udev-watch.c +++ b/udev/udev-watch.c @@ -72,8 +72,7 @@ void udev_watch_restore(struct udev *udev) } for (ent = readdir(dir); ent != NULL; ent = readdir(dir)) { - char path[UTIL_PATH_SIZE]; - char buf[UTIL_PATH_SIZE]; + char device[UTIL_PATH_SIZE]; char *s; size_t l; ssize_t len; @@ -82,19 +81,18 @@ void udev_watch_restore(struct udev *udev) if (ent->d_name[0] < '0' || ent->d_name[0] > '9') continue; - util_strscpyl(path, sizeof(path), oldname, "/", ent->d_name, NULL); - s = buf; - l = util_strpcpy(&s, sizeof(buf), udev_get_sys_path(udev)); - len = readlink(path, s, l); + s = device; + l = util_strpcpy(&s, sizeof(device), udev_get_sys_path(udev)); + len = readlinkat(dirfd(dir), ent->d_name, s, l); if (len <= 0 || len >= (ssize_t)l) { - unlink(path); + unlinkat(dirfd(dir), ent->d_name, 0); continue; } s[len] = '\0'; - dbg(udev, "old watch to '%s' found\n", buf); - dev = udev_device_new_from_syspath(udev, buf); + dbg(udev, "old watch to '%s' found\n", device); + dev = udev_device_new_from_syspath(udev, device); if (dev == NULL) { - unlink(path); + unlinkat(dirfd(dir), ent->d_name, 0); continue; } @@ -102,7 +100,7 @@ void udev_watch_restore(struct udev *udev) udev_watch_begin(udev, dev); udev_device_unref(dev); - unlink(path); + unlinkat(dirfd(dir), ent->d_name, 0); } closedir(dir); diff --git a/udev/udevadm-info.c b/udev/udevadm-info.c index db11a289b2..b743a1d642 100644 --- a/udev/udevadm-info.c +++ b/udev/udevadm-info.c @@ -25,6 +25,7 @@ #include #include #include +#include #include #include @@ -40,7 +41,6 @@ static void print_all_attributes(struct udev_device *device, const char *key) if (dir != NULL) { for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) { struct stat statbuf; - char filename[UTIL_PATH_SIZE]; const char *value; size_t len; @@ -52,8 +52,7 @@ static void print_all_attributes(struct udev_device *device, const char *key) if (strcmp(dent->d_name, "dev") == 0) continue; - util_strscpyl(filename, sizeof(filename), udev_device_get_syspath(device), "/", dent->d_name, NULL); - if (lstat(filename, &statbuf) != 0) + if (fstatat(dirfd(dir), dent->d_name, &statbuf, AT_SYMLINK_NOFOLLOW) != 0) continue; if (S_ISLNK(statbuf.st_mode)) continue; diff --git a/udev/udevd.c b/udev/udevd.c index 1fe76f8829..b64f08b5c5 100644 --- a/udev/udevd.c +++ b/udev/udevd.c @@ -649,8 +649,7 @@ static void cleanup_queue_dir(struct udev *udev) break; if (dent->d_name[0] == '.') continue; - util_strscpyl(filename, sizeof(filename), dirname, "/", dent->d_name, NULL); - unlink(filename); + unlinkat(dirfd(dir), dent->d_name, 0); } closedir(dir); rmdir(dirname); -- cgit v1.2.3-54-g00ecf