X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Ftmpfiles%2Ftmpfiles.c;h=68f0a5cf7846bf9d29a9eb398a0e04852c7e9a66;hp=5eca82ad26c423c3ca7320eb20eecb9e98c83de6;hb=874f1947e33922f08c578696af5b628a0f67fec2;hpb=5c7951141fa9f33e1b97de97586cc16bce2776e0 diff --git a/src/tmpfiles/tmpfiles.c b/src/tmpfiles/tmpfiles.c index 5eca82ad2..68f0a5cf7 100644 --- a/src/tmpfiles/tmpfiles.c +++ b/src/tmpfiles/tmpfiles.c @@ -51,6 +51,8 @@ #include "set.h" #include "conf-files.h" #include "capability.h" +#include "specifier.h" +#include "build.h" /* This reads all files listed in /etc/tmpfiles.d/?*.conf and creates * them in the file system. This is intended to be used to create @@ -68,6 +70,7 @@ typedef enum ItemType { CREATE_SYMLINK = 'L', CREATE_CHAR_DEVICE = 'c', CREATE_BLOCK_DEVICE = 'b', + ADJUST_MODE = 'm', /* These ones take globs */ IGNORE_PATH = 'x', @@ -104,9 +107,11 @@ static Set *unix_sockets = NULL; static bool arg_create = false; static bool arg_clean = false; static bool arg_remove = false; +static bool arg_boot = false; static char **include_prefixes = NULL; static char **exclude_prefixes = NULL; +static char *arg_root = NULL; static const char conf_file_dirs[] = "/etc/tmpfiles.d\0" @@ -212,19 +217,16 @@ static bool unix_socket_alive(const char *fn) { } static int dir_is_mount_point(DIR *d, const char *subdir) { - struct file_handle *h; + union file_handle_union h = { .handle.handle_bytes = MAX_HANDLE_SZ }; int mount_id_parent, mount_id; int r_p, r; - h = alloca(MAX_HANDLE_SZ); - - h->handle_bytes = MAX_HANDLE_SZ; - r_p = name_to_handle_at(dirfd(d), ".", h, &mount_id_parent, 0); + r_p = name_to_handle_at(dirfd(d), ".", &h.handle, &mount_id_parent, 0); if (r_p < 0) r_p = -errno; - h->handle_bytes = MAX_HANDLE_SZ; - r = name_to_handle_at(dirfd(d), subdir, h, &mount_id, 0); + h.handle.handle_bytes = MAX_HANDLE_SZ; + r = name_to_handle_at(dirfd(d), subdir, &h.handle, &mount_id, 0); if (r < 0) r = -errno; @@ -256,8 +258,8 @@ static int dir_cleanup( dev_t rootdev, bool mountpoint, int maxdepth, - bool keep_this_level) -{ + bool keep_this_level) { + struct dirent *dent; struct timespec times[2]; bool deleted = false; @@ -273,12 +275,15 @@ static int dir_cleanup( continue; if (fstatat(dirfd(d), dent->d_name, &s, AT_SYMLINK_NOFOLLOW) < 0) { + if (errno == ENOENT) + continue; - if (errno != ENOENT) { + /* FUSE, NFS mounts, SELinux might return EACCES */ + if (errno == EACCES) + log_debug("stat(%s/%s) failed: %m", p, dent->d_name); + else log_error("stat(%s/%s) failed: %m", p, dent->d_name); - r = -errno; - } - + r = -errno; continue; } @@ -354,7 +359,7 @@ static int dir_cleanup( continue; if (i->type != IGNORE_DIRECTORY_PATH || !streq(dent->d_name, p)) { - log_debug("rmdir '%s'\n", sub_path); + log_debug("rmdir '%s'", sub_path); if (unlinkat(dirfd(d), dent->d_name, AT_REMOVEDIR) < 0) { if (errno != ENOENT && errno != ENOTEMPTY) { @@ -402,7 +407,7 @@ static int dir_cleanup( if (age >= cutoff) continue; - log_debug("unlink '%s'\n", sub_path); + log_debug("unlink '%s'", sub_path); if (unlinkat(dirfd(d), dent->d_name, 0) < 0) { if (errno != ENOENT) { @@ -428,12 +433,14 @@ finish: return r; } -static int item_set_perms(Item *i, const char *path) { +static int item_set_perms_full(Item *i, const char *path, bool ignore_enoent) { /* not using i->path directly because it may be a glob */ if (i->mode_set) if (chmod(path, i->mode) < 0) { - log_error("chmod(%s) failed: %m", path); - return -errno; + if (errno != ENOENT || !ignore_enoent) { + log_error("chmod(%s) failed: %m", path); + return -errno; + } } if (i->uid_set || i->gid_set) @@ -441,16 +448,27 @@ static int item_set_perms(Item *i, const char *path) { i->uid_set ? i->uid : (uid_t) -1, i->gid_set ? i->gid : (gid_t) -1) < 0) { - log_error("chown(%s) failed: %m", path); - return -errno; + if (errno != ENOENT || !ignore_enoent) { + log_error("chown(%s) failed: %m", path); + return -errno; + } } - return label_fix(path, false, false); + return label_fix(path, ignore_enoent, false); +} + +static int item_set_perms(Item *i, const char *path) { + return item_set_perms_full(i, path, false); } static int write_one_file(Item *i, const char *path) { - int r, e, fd, flags; + int flags; + int fd = -1; struct stat st; + int r = 0; + + assert(i); + assert(path); flags = i->type == CREATE_FILE ? O_CREAT|O_APPEND : i->type == TRUNCATE_FILE ? O_CREAT|O_TRUNC : 0; @@ -458,9 +476,7 @@ static int write_one_file(Item *i, const char *path) { RUN_WITH_UMASK(0) { label_context_set(path, S_IFREG); fd = open(path, flags|O_NDELAY|O_CLOEXEC|O_WRONLY|O_NOCTTY|O_NOFOLLOW, i->mode); - e = errno; label_context_clear(); - errno = e; } if (fd < 0) { @@ -478,7 +494,7 @@ static int write_one_file(Item *i, const char *path) { unescaped = cunescape(i->argument); if (unescaped == NULL) { - close_nointr_nofail(fd); + safe_close(fd); return log_oom(); } @@ -487,12 +503,12 @@ static int write_one_file(Item *i, const char *path) { if (n < 0 || (size_t) n < l) { log_error("Failed to write file %s: %s", path, n < 0 ? strerror(-n) : "Short write"); - close_nointr_nofail(fd); + safe_close(fd); return n < 0 ? n : -EIO; } } - close_nointr_nofail(fd); + safe_close(fd); if (stat(path, &st) < 0) { log_error("stat(%s) failed: %m", path); @@ -524,15 +540,15 @@ static int recursive_relabel_children(Item *i, const char *path) { for (;;) { struct dirent *de; - union dirent_storage buf; - bool is_dir; + bool dir; int r; _cleanup_free_ char *entry_path = NULL; - r = readdir_r(d, &buf.de, &de); - if (r != 0) { + errno = 0; + de = readdir(d); + if (!de && errno != 0) { if (ret == 0) - ret = -r; + ret = -errno; break; } @@ -549,18 +565,17 @@ static int recursive_relabel_children(Item *i, const char *path) { } if (de->d_type == DT_UNKNOWN) { - struct stat st; - - if (lstat(entry_path, &st) < 0) { + r = is_dir(entry_path); + if (r < 0) { if (ret == 0 && errno != ENOENT) ret = -errno; continue; } - is_dir = S_ISDIR(st.st_mode); + dir = r; } else - is_dir = de->d_type == DT_DIR; + dir = de->d_type == DT_DIR; r = item_set_perms(i, entry_path); if (r < 0) { @@ -569,7 +584,7 @@ static int recursive_relabel_children(Item *i, const char *path) { continue; } - if (is_dir) { + if (dir) { r = recursive_relabel_children(i, entry_path); if (r < 0 && ret == 0) ret = r; @@ -622,8 +637,8 @@ static int glob_item(Item *i, int (*action)(Item *, const char *)) { } static int create_item(Item *i) { - int r, e; struct stat st; + int r = 0; assert(i); @@ -641,6 +656,7 @@ static int create_item(Item *i) { if (r < 0) return r; break; + case WRITE_FILE: r = glob_item(i, write_one_file); if (r < 0) @@ -648,6 +664,13 @@ static int create_item(Item *i) { break; + case ADJUST_MODE: + r = item_set_perms_full(i, i->path, true); + if (r < 0) + return r; + + break; + case TRUNCATE_DIRECTORY: case CREATE_DIRECTORY: @@ -705,13 +728,11 @@ static int create_item(Item *i) { break; case CREATE_SYMLINK: { - char *x; + _cleanup_free_ char *x = NULL; label_context_set(i->path, S_IFLNK); r = symlink(i->argument, i->path); - e = errno; label_context_clear(); - errno = e; if (r < 0 && errno != EEXIST) { log_error("symlink(%s, %s) failed: %m", i->argument, i->path); @@ -725,12 +746,10 @@ static int create_item(Item *i) { } if (!streq(i->argument, x)) { - free(x); log_error("%s is not the right symlinks.", i->path); return -EEXIST; } - free(x); break; } @@ -753,9 +772,7 @@ static int create_item(Item *i) { RUN_WITH_UMASK(0000) { label_context_set(i->path, file_type); r = mknod(i->path, i->mode | file_type, i->major_minor); - e = errno; label_context_clear(); - errno = e; } if (r < 0 && errno != EEXIST) { @@ -818,6 +835,7 @@ static int remove_item_instance(Item *i, const char *instance) { case RELABEL_PATH: case RECURSIVE_RELABEL_PATH: case WRITE_FILE: + case ADJUST_MODE: break; case REMOVE_PATH: @@ -863,6 +881,7 @@ static int remove_item(Item *i) { case RELABEL_PATH: case RECURSIVE_RELABEL_PATH: case WRITE_FILE: + case ADJUST_MODE: break; case REMOVE_PATH: @@ -972,10 +991,7 @@ static void item_free(Item *i) { free(i); } -static inline void item_freep(Item **i) { - if (*i) - item_free(*i); -} +DEFINE_TRIVIAL_CLEANUP_FUNC(Item*, item_free); #define _cleanup_item_free_ _cleanup_(item_freep) static bool item_equal(Item *a, Item *b) { @@ -1038,10 +1054,19 @@ static bool should_include_path(const char *path) { } static int parse_line(const char *fname, unsigned line, const char *buffer) { + + static const Specifier specifier_table[] = { + { 'm', specifier_machine_id, NULL }, + { 'b', specifier_boot_id, NULL }, + { 'H', specifier_host_name, NULL }, + { 'v', specifier_kernel_release, NULL }, + {} + }; + _cleanup_item_free_ Item *i = NULL; Item *existing; _cleanup_free_ char - *mode = NULL, *user = NULL, *group = NULL, *age = NULL; + *action = NULL, *mode = NULL, *user = NULL, *group = NULL, *age = NULL, *path = NULL; char type; Hashmap *h; int r, n = -1; @@ -1050,14 +1075,10 @@ static int parse_line(const char *fname, unsigned line, const char *buffer) { assert(line >= 1); assert(buffer); - i = new0(Item, 1); - if (!i) - return log_oom(); - r = sscanf(buffer, - "%c %ms %ms %ms %ms %ms %n", - &type, - &i->path, + "%ms %ms %ms %ms %ms %ms %n", + &action, + &path, &mode, &user, &group, @@ -1068,6 +1089,24 @@ static int parse_line(const char *fname, unsigned line, const char *buffer) { return -EIO; } + if (strlen(action) > 2 || (strlen(action) > 1 && action[1] != '!')) { + log_error("[%s:%u] Unknown modifier '%s'", fname, line, action); + return -EINVAL; + } else if (strlen(action) > 1 && !arg_boot) + return 0; + + type = action[0]; + + i = new0(Item, 1); + if (!i) + return log_oom(); + + r = specifier_printf(path, specifier_table, NULL, &i->path); + if (r < 0) { + log_error("[%s:%u] Failed to replace specifiers: %s", fname, line, path); + return r; + } + if (n >= 0) { n += strspn(buffer+n, WHITESPACE); if (buffer[n] != 0 && (buffer[n] != '-' || buffer[n+1] != 0)) { @@ -1090,6 +1129,7 @@ static int parse_line(const char *fname, unsigned line, const char *buffer) { case RECURSIVE_REMOVE_PATH: case RELABEL_PATH: case RECURSIVE_RELABEL_PATH: + case ADJUST_MODE: break; case CREATE_SYMLINK: @@ -1141,6 +1181,15 @@ static int parse_line(const char *fname, unsigned line, const char *buffer) { if (!should_include_path(i->path)) return 0; + if (arg_root) { + char *p = strappend(arg_root, i->path); + if (!p) + return log_oom(); + + free(i->path); + i->path = p; + } + if (user && !streq(user, "-")) { const char *u = user; @@ -1224,11 +1273,14 @@ static int help(void) { printf("%s [OPTIONS...] [CONFIGURATION FILE...]\n\n" "Creates, deletes and cleans up volatile and temporary files and directories.\n\n" " -h --help Show this help\n" + " --version Show package version\n" " --create Create marked files/directories\n" " --clean Clean up marked directories\n" " --remove Remove marked files/directories\n" + " --boot Execute actions only safe at boot\n" " --prefix=PATH Only apply rules that apply to paths with the specified prefix\n" - " --exclude-prefix=PATH Ignore rules that apply to paths with the specified prefix\n", + " --exclude-prefix=PATH Ignore rules that apply to paths with the specified prefix\n" + " --root=PATH Operate on an alternate filesystem root\n", program_invocation_short_name); return 0; @@ -1237,21 +1289,27 @@ static int help(void) { static int parse_argv(int argc, char *argv[]) { enum { + ARG_VERSION = 0x100, ARG_CREATE, ARG_CLEAN, ARG_REMOVE, + ARG_BOOT, ARG_PREFIX, ARG_EXCLUDE_PREFIX, + ARG_ROOT, }; static const struct option options[] = { { "help", no_argument, NULL, 'h' }, + { "version", no_argument, NULL, ARG_VERSION }, { "create", no_argument, NULL, ARG_CREATE }, { "clean", no_argument, NULL, ARG_CLEAN }, { "remove", no_argument, NULL, ARG_REMOVE }, + { "boot", no_argument, NULL, ARG_BOOT }, { "prefix", required_argument, NULL, ARG_PREFIX }, { "exclude-prefix", required_argument, NULL, ARG_EXCLUDE_PREFIX }, - { NULL, 0, NULL, 0 } + { "root", required_argument, NULL, ARG_ROOT }, + {} }; int c; @@ -1264,7 +1322,11 @@ static int parse_argv(int argc, char *argv[]) { switch (c) { case 'h': - help(); + return help(); + + case ARG_VERSION: + puts(PACKAGE_STRING); + puts(SYSTEMD_FEATURES); return 0; case ARG_CREATE: @@ -1279,22 +1341,32 @@ static int parse_argv(int argc, char *argv[]) { arg_remove = true; break; + case ARG_BOOT: + arg_boot = true; + break; + case ARG_PREFIX: - if (strv_extend(&include_prefixes, optarg) < 0) + if (strv_push(&include_prefixes, optarg) < 0) return log_oom(); break; case ARG_EXCLUDE_PREFIX: - if (strv_extend(&exclude_prefixes, optarg) < 0) + if (strv_push(&exclude_prefixes, optarg) < 0) return log_oom(); break; + case ARG_ROOT: + arg_root = path_make_absolute_cwd(optarg); + if (!arg_root) + return log_oom(); + path_kill_slashes(arg_root); + break; + case '?': return -EINVAL; default: - log_error("Unknown option code %c", c); - return -EINVAL; + assert_not_reached("Unhandled option"); } } @@ -1307,15 +1379,16 @@ static int parse_argv(int argc, char *argv[]) { } static int read_config_file(const char *fn, bool ignore_enoent) { - FILE *f; - unsigned v = 0; - int r; + _cleanup_fclose_ FILE *f = NULL; + char line[LINE_MAX]; Iterator iterator; + unsigned v = 0; Item *i; + int r; assert(fn); - r = search_and_fopen_nulstr(fn, "re", conf_file_dirs, &f); + r = search_and_fopen_nulstr(fn, "re", arg_root, conf_file_dirs, &f); if (r < 0) { if (ignore_enoent && r == -ENOENT) return 0; @@ -1324,23 +1397,19 @@ static int read_config_file(const char *fn, bool ignore_enoent) { return r; } - log_debug("apply: %s\n", fn); - for (;;) { - char line[LINE_MAX], *l; + FOREACH_LINE(line, f, break) { + char *l; int k; - if (!(fgets(line, sizeof(line), f))) - break; - v++; l = strstrip(line); if (*l == '#' || *l == 0) continue; - if ((k = parse_line(fn, v, l)) < 0) - if (r == 0) - r = k; + k = parse_line(fn, v, l); + if (k < 0 && r == 0) + r = k; } /* we have to determine age parameter for each entry of type X */ @@ -1377,8 +1446,6 @@ static int read_config_file(const char *fn, bool ignore_enoent) { r = -EIO; } - fclose(f); - return r; } @@ -1422,7 +1489,7 @@ int main(int argc, char *argv[]) { _cleanup_strv_free_ char **files = NULL; char **f; - r = conf_files_list_nulstr(&files, ".conf", NULL, conf_file_dirs); + r = conf_files_list_nulstr(&files, ".conf", arg_root, conf_file_dirs); if (r < 0) { log_error("Failed to enumerate tmpfiles.d files: %s", strerror(-r)); goto finish; @@ -1451,7 +1518,9 @@ finish: hashmap_free(items); hashmap_free(globs); - strv_free(include_prefixes); + free(include_prefixes); + free(exclude_prefixes); + free(arg_root); set_free_free(unix_sockets);