diff options
Diffstat (limited to 'libudev')
| -rw-r--r-- | libudev/libudev-device-private.c | 28 |
1 files changed, 17 insertions, 11 deletions
diff --git a/libudev/libudev-device-private.c b/libudev/libudev-device-private.c index 66f0328eb3..07249c3885 100644 --- a/libudev/libudev-device-private.c +++ b/libudev/libudev-device-private.c @@ -25,6 +25,7 @@ int udev_device_update_db(struct udev_device *udev_device) { struct udev *udev = udev_device_get_udev(udev_device); char filename[UTIL_PATH_SIZE]; + char filename_tmp[UTIL_PATH_SIZE]; FILE *f; char target[232]; /* on 64bit, tmpfs inlines up to 239 bytes */ size_t devlen = strlen(udev_get_dev_path(udev))+1; @@ -35,7 +36,7 @@ int udev_device_update_db(struct udev_device *udev_device) util_strscpyl(filename, sizeof(filename), udev_get_dev_path(udev), "/.udev/db/", udev_device_get_subsystem(udev_device), ":", udev_device_get_sysname(udev_device), NULL); - unlink(filename); + util_strscpyl(filename_tmp, sizeof(filename_tmp), filename, ".tmp", NULL); udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(udev_device)) if (udev_list_entry_get_flag(list_entry)) @@ -66,21 +67,24 @@ int udev_device_update_db(struct udev_device *udev_device) goto file; } } - info(udev, "create db link (%s)\n", target); - udev_selinux_setfscreatecon(udev, filename, S_IFLNK); - util_create_path(udev, filename); - ret = symlink(target, filename); + udev_selinux_setfscreatecon(udev, filename_tmp, S_IFLNK); + util_create_path(udev, filename_tmp); + ret = symlink(target, filename_tmp); udev_selinux_resetfscreatecon(udev); - if (ret == 0) - goto out; + if (ret != 0) + goto file; + ret = rename(filename_tmp, filename); + if (ret != 0) + goto file; + info(udev, "created db link (%s)\n", target); + goto out; file: - util_create_path(udev, filename); - f = fopen(filename, "w"); + util_create_path(udev, filename_tmp); + f = fopen(filename_tmp, "w"); if (f == NULL) { - err(udev, "unable to create db file '%s': %m\n", filename); + err(udev, "unable to create temporary db file '%s': %m\n", filename_tmp); return -1; } - info(udev, "created db file for '%s' in '%s'\n", udev_device_get_devpath(udev_device), filename); if (udev_device_get_devnode(udev_device) != NULL) { fprintf(f, "N:%s\n", &udev_device_get_devnode(udev_device)[devlen]); @@ -105,6 +109,8 @@ file: udev_list_entry_get_value(list_entry)); } fclose(f); + rename(filename_tmp, filename); + info(udev, "created db file for '%s' in '%s'\n", udev_device_get_devpath(udev_device), filename); out: return 0; } |