X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Ftmpfiles.c;h=20960196991efb277a519131f32976b377eba53c;hp=80e424f7b6aa4f9b58ecef7b3a548fca388fbb85;hb=468d726bdd0a383713964dec01fc38ca31256d62;hpb=bfaf42d22bbd72a286b519ea121dbf8e799b1fe5 diff --git a/src/tmpfiles.c b/src/tmpfiles.c index 80e424f7b..209601969 100644 --- a/src/tmpfiles.c +++ b/src/tmpfiles.c @@ -3,7 +3,7 @@ /*** This file is part of systemd. - Copyright 2010 Lennart Poettering + Copyright 2010 Lennart Poettering, Kay Sievers systemd is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by @@ -28,280 +28,1233 @@ #include #include #include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include #include "log.h" #include "util.h" #include "strv.h" #include "label.h" +#include "set.h" -/* This reads all files listed in /etc/tempfiles.d/?*.conf and creates +/* 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 - * properly owned directories beneath /tmp, /var/tmp, /var/run and - * /var/lock which are volatile and hence need to be recreated on - * bootup. */ - -static void process_line(const char *fname, unsigned line, const char *buffer, const char *prefix) { - char type; - char *path = NULL; - unsigned mode; - char *user = NULL, *group = NULL; + * properly owned directories beneath /tmp, /var/tmp, /run, which are + * volatile and hence need to be recreated on bootup. */ + +typedef enum ItemType { + /* These ones take file names */ + CREATE_FILE = 'f', + TRUNCATE_FILE = 'F', + CREATE_DIRECTORY = 'd', + TRUNCATE_DIRECTORY = 'D', + CREATE_FIFO = 'p', + CREATE_SYMLINK = 'L', + CREATE_CHAR_DEVICE = 'c', + CREATE_BLOCK_DEVICE = 'b', + + /* These ones take globs */ + IGNORE_PATH = 'x', + REMOVE_PATH = 'r', + RECURSIVE_REMOVE_PATH = 'R', + RELABEL_PATH = 'z', + RECURSIVE_RELABEL_PATH = 'Z' +} ItemType; + +typedef struct Item { + ItemType type; + + char *path; + char *argument; uid_t uid; gid_t gid; - bool uid_set = false, gid_set = false; - int n, fd = -1; + mode_t mode; + usec_t age; - assert(fname); - assert(line >= 1); - assert(buffer); + dev_t major_minor; - if ((n = sscanf(buffer, - "%c " - "%ms " - "%o " - "%ms " - "%ms ", - &type, - &path, - &mode, - &user, - &group)) < 2) { - log_error("[%s:%u] Syntax error.", fname, line); + bool uid_set:1; + bool gid_set:1; + bool mode_set:1; + bool age_set:1; +} Item; + +static Hashmap *items = NULL, *globs = NULL; +static Set *unix_sockets = NULL; + +static bool arg_create = false; +static bool arg_clean = false; +static bool arg_remove = false; + +static const char *arg_prefix = NULL; + +#define MAX_DEPTH 256 + +static bool needs_glob(ItemType t) { + return t == IGNORE_PATH || t == REMOVE_PATH || t == RECURSIVE_REMOVE_PATH || t == RELABEL_PATH || t == RECURSIVE_RELABEL_PATH; +} + +static struct Item* find_glob(Hashmap *h, const char *match) { + Item *j; + Iterator i; + + HASHMAP_FOREACH(j, h, i) + if (fnmatch(j->path, match, FNM_PATHNAME|FNM_PERIOD) == 0) + return j; + + return NULL; +} + +static void load_unix_sockets(void) { + FILE *f = NULL; + char line[LINE_MAX]; + + if (unix_sockets) + return; + + /* We maintain a cache of the sockets we found in + * /proc/net/unix to speed things up a little. */ + + unix_sockets = set_new(string_hash_func, string_compare_func); + if (!unix_sockets) + return; + + f = fopen("/proc/net/unix", "re"); + if (!f) + return; + + /* Skip header */ + if (!fgets(line, sizeof(line), f)) + goto fail; + + for (;;) { + char *p, *s; + int k; + + if (!fgets(line, sizeof(line), f)) + break; + + truncate_nl(line); + + p = strchr(line, ':'); + if (!p) + continue; + + if (strlen(p) < 37) + continue; + + p += 37; + p += strspn(p, WHITESPACE); + p += strcspn(p, WHITESPACE); /* skip one more word */ + p += strspn(p, WHITESPACE); + + if (*p != '/') + continue; + + s = strdup(p); + if (!s) + goto fail; + + path_kill_slashes(s); + + k = set_put(unix_sockets, s); + if (k < 0) { + free(s); + + if (k != -EEXIST) + goto fail; + } + } + + fclose(f); + return; + +fail: + set_free_free(unix_sockets); + unix_sockets = NULL; + + if (f) + fclose(f); +} + +static bool unix_socket_alive(const char *fn) { + assert(fn); + + load_unix_sockets(); + + if (unix_sockets) + return !!set_get(unix_sockets, (char*) fn); + + /* We don't know, so assume yes */ + return true; +} + +static int dir_cleanup( + const char *p, + DIR *d, + const struct stat *ds, + usec_t cutoff, + dev_t rootdev, + bool mountpoint, + int maxdepth) +{ + struct dirent *dent; + struct timespec times[2]; + bool deleted = false; + char *sub_path = NULL; + int r = 0; + + while ((dent = readdir(d))) { + struct stat s; + usec_t age; + + if (streq(dent->d_name, ".") || + streq(dent->d_name, "..")) + continue; + + if (fstatat(dirfd(d), dent->d_name, &s, AT_SYMLINK_NOFOLLOW) < 0) { + + if (errno != ENOENT) { + log_error("stat(%s/%s) failed: %m", p, dent->d_name); + r = -errno; + } + + continue; + } + + /* Stay on the same filesystem */ + if (s.st_dev != rootdev) + continue; + + /* Do not delete read-only files owned by root */ + if (s.st_uid == 0 && !(s.st_mode & S_IWUSR)) + continue; + + free(sub_path); + sub_path = NULL; + + if (asprintf(&sub_path, "%s/%s", p, dent->d_name) < 0) { + log_error("Out of memory"); + r = -ENOMEM; + goto finish; + } + + /* Is there an item configured for this path? */ + if (hashmap_get(items, sub_path)) + continue; + + if (find_glob(globs, sub_path)) + continue; + + if (S_ISDIR(s.st_mode)) { + + if (mountpoint && + streq(dent->d_name, "lost+found") && + s.st_uid == 0) + continue; + + if (maxdepth <= 0) + log_warning("Reached max depth on %s.", sub_path); + else { + DIR *sub_dir; + int q; + + sub_dir = xopendirat(dirfd(d), dent->d_name, O_NOFOLLOW); + if (sub_dir == NULL) { + if (errno != ENOENT) { + log_error("opendir(%s/%s) failed: %m", p, dent->d_name); + r = -errno; + } + + continue; + } + + q = dir_cleanup(sub_path, sub_dir, &s, cutoff, rootdev, false, maxdepth-1); + closedir(sub_dir); + + if (q < 0) + r = q; + } + + /* Ignore ctime, we change it when deleting */ + age = MAX(timespec_load(&s.st_mtim), + timespec_load(&s.st_atim)); + if (age >= cutoff) + continue; + + log_debug("rmdir '%s'\n", sub_path); + + if (unlinkat(dirfd(d), dent->d_name, AT_REMOVEDIR) < 0) { + if (errno != ENOENT && errno != ENOTEMPTY) { + log_error("rmdir(%s): %m", sub_path); + r = -errno; + } + } + + } else { + /* Skip files for which the sticky bit is + * set. These are semantics we define, and are + * unknown elsewhere. See XDG_RUNTIME_DIR + * specification for details. */ + if (s.st_mode & S_ISVTX) + continue; + + if (mountpoint && S_ISREG(s.st_mode)) { + if (streq(dent->d_name, ".journal") && + s.st_uid == 0) + continue; + + if (streq(dent->d_name, "aquota.user") || + streq(dent->d_name, "aquota.group")) + continue; + } + + /* Ignore sockets that are listed in /proc/net/unix */ + if (S_ISSOCK(s.st_mode) && unix_socket_alive(sub_path)) + continue; + + /* Ignore device nodes */ + if (S_ISCHR(s.st_mode) || S_ISBLK(s.st_mode)) + continue; + + age = MAX3(timespec_load(&s.st_mtim), + timespec_load(&s.st_atim), + timespec_load(&s.st_ctim)); + + if (age >= cutoff) + continue; + + log_debug("unlink '%s'\n", sub_path); + + if (unlinkat(dirfd(d), dent->d_name, 0) < 0) { + if (errno != ENOENT) { + log_error("unlink(%s): %m", sub_path); + r = -errno; + } + } + + deleted = true; + } + } + +finish: + if (deleted) { + /* Restore original directory timestamps */ + times[0] = ds->st_atim; + times[1] = ds->st_mtim; + + if (futimens(dirfd(d), times) < 0) + log_error("utimensat(%s): %m", p); + } + + free(sub_path); + + return r; +} + +static int clean_item(Item *i) { + DIR *d; + struct stat s, ps; + bool mountpoint; + int r; + usec_t cutoff, n; + + assert(i); + + if (i->type != CREATE_DIRECTORY && + i->type != TRUNCATE_DIRECTORY && + i->type != IGNORE_PATH) + return 0; + + if (!i->age_set || i->age <= 0) + return 0; + + n = now(CLOCK_REALTIME); + if (n < i->age) + return 0; + + cutoff = n - i->age; + + d = opendir(i->path); + if (!d) { + if (errno == ENOENT) + return 0; + + log_error("Failed to open directory %s: %m", i->path); + return -errno; + } + + if (fstat(dirfd(d), &s) < 0) { + log_error("stat(%s) failed: %m", i->path); + r = -errno; goto finish; } - if (type != 'f' && type != 'd') { - log_error("[%s:%u] Unknown file type '%c'.", fname, line, type); + if (!S_ISDIR(s.st_mode)) { + log_error("%s is not a directory.", i->path); + r = -ENOTDIR; goto finish; } - if (prefix && !path_startswith(path, prefix)) + if (fstatat(dirfd(d), "..", &ps, AT_SYMLINK_NOFOLLOW) != 0) { + log_error("stat(%s/..) failed: %m", i->path); + r = -errno; goto finish; + } - if (user && !streq(user, "-")) { - unsigned long lu; - struct passwd *p; - - if (streq(user, "root") || streq(user, "0")) - uid = 0; - else if (safe_atolu(user, &lu) >= 0) - uid = (uid_t) lu; - else if ((p = getpwnam(user))) - uid = p->pw_uid; - else { - log_error("[%s:%u] Unknown user '%s'.", fname, line, user); - goto finish; + mountpoint = s.st_dev != ps.st_dev || + (s.st_dev == ps.st_dev && s.st_ino == ps.st_ino); + + r = dir_cleanup(i->path, d, &s, cutoff, s.st_dev, mountpoint, MAX_DEPTH); + +finish: + if (d) + closedir(d); + + return r; +} + +static int item_set_perms(Item *i, const char *path) { + /* 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; } - uid_set = true; - } + if (i->uid_set || i->gid_set) + if (chown(path, + i->uid_set ? i->uid : (uid_t) -1, + i->gid_set ? i->gid : (gid_t) -1) < 0) { - if (group && !streq(group, "-")) { - unsigned long lu; - struct group *g; - - if (streq(group, "root") || streq(group, "0")) - gid = 0; - else if (safe_atolu(group, &lu) >= 0) - gid = (gid_t) lu; - else if ((g = getgrnam(group))) - gid = g->gr_gid; - else { - log_error("[%s:%u] Unknown group '%s'.", fname, line, group); - goto finish; + log_error("chown(%s) failed: %m", path); + return -errno; + } + + return label_fix(path, false); +} + +static int recursive_relabel_children(Item *i, const char *path) { + DIR *d; + int ret = 0; + + /* This returns the first error we run into, but nevertheless + * tries to go on */ + + d = opendir(path); + if (!d) + return errno == ENOENT ? 0 : -errno; + + for (;;) { + struct dirent buf, *de; + bool is_dir; + int r; + char *entry_path; + + r = readdir_r(d, &buf, &de); + if (r != 0) { + if (ret == 0) + ret = -r; + break; } - gid_set = true; + if (!de) + break; + + if (streq(de->d_name, ".") || streq(de->d_name, "..")) + continue; + + if (asprintf(&entry_path, "%s/%s", path, de->d_name) < 0) { + if (ret == 0) + ret = -ENOMEM; + continue; + } + + if (de->d_type == DT_UNKNOWN) { + struct stat st; + + if (lstat(entry_path, &st) < 0) { + if (ret == 0 && errno != ENOENT) + ret = -errno; + free(entry_path); + continue; + } + + is_dir = S_ISDIR(st.st_mode); + + } else + is_dir = de->d_type == DT_DIR; + + r = item_set_perms(i, entry_path); + if (r < 0) { + if (ret == 0 && r != -ENOENT) + ret = r; + free(entry_path); + continue; + } + + if (is_dir) { + r = recursive_relabel_children(i, entry_path); + if (r < 0 && ret == 0) + ret = r; + } + + free(entry_path); } - if (n < 3) - mode = type == 'f' ? 0644 : 0755; + closedir(d); + + return ret; +} + +static int recursive_relabel(Item *i, const char *path) { + int r; + struct stat st; + + r = item_set_perms(i, path); + if (r < 0) + return r; + + if (lstat(path, &st) < 0) + return -errno; - if (type == 'f') { - mode_t u; - struct stat st; + if (S_ISDIR(st.st_mode)) + r = recursive_relabel_children(i, path); + + return r; +} + +static int glob_item(Item *i, int (*action)(Item *, const char *)) { + int r = 0, k; + glob_t g; + char **fn; + + zero(g); + + errno = 0; + if ((k = glob(i->path, GLOB_NOSORT|GLOB_BRACE, NULL, &g)) != 0) { + + if (k != GLOB_NOMATCH) { + if (errno != 0) + errno = EIO; + + log_error("glob(%s) failed: %m", i->path); + return -errno; + } + } + + STRV_FOREACH(fn, g.gl_pathv) + if ((k = action(i, *fn)) < 0) + r = k; + + globfree(&g); + return r; +} + +static int create_item(Item *i) { + int r; + mode_t u; + struct stat st; + + assert(i); + + switch (i->type) { + + case IGNORE_PATH: + case REMOVE_PATH: + case RECURSIVE_REMOVE_PATH: + return 0; + + case CREATE_FILE: + case TRUNCATE_FILE: { + int fd; u = umask(0); - fd = open(path, O_CREAT|O_NDELAY|O_CLOEXEC|O_WRONLY|O_NOCTTY|O_NOFOLLOW, mode); + fd = open(i->path, O_CREAT|O_NDELAY|O_CLOEXEC|O_WRONLY|O_NOCTTY|O_NOFOLLOW| + (i->type == TRUNCATE_FILE ? O_TRUNC : 0), i->mode); umask(u); if (fd < 0) { - log_error("Failed to create file %s: %m", path); - goto finish; + log_error("Failed to create file %s: %m", i->path); + return -errno; } - if (fstat(fd, &st) < 0) { - log_error("stat(%s) failed: %m", path); - goto finish; + close_nointr_nofail(fd); + + if (stat(i->path, &st) < 0) { + log_error("stat(%s) failed: %m", i->path); + return -errno; } if (!S_ISREG(st.st_mode)) { - log_error("%s is not a file.", path); - goto finish; + log_error("%s is not a file.", i->path); + return -EEXIST; } - if (fchmod(fd, mode) < 0) { - log_error("chmod(%s) failed: %m", path); - goto finish; + r = item_set_perms(i, i->path); + if (r < 0) + return r; + + break; + } + + case TRUNCATE_DIRECTORY: + case CREATE_DIRECTORY: + + u = umask(0); + mkdir_parents(i->path, 0755); + r = mkdir(i->path, i->mode); + umask(u); + + if (r < 0 && errno != EEXIST) { + log_error("Failed to create directory %s: %m", i->path); + return -errno; } - if (uid_set || gid_set) { + if (stat(i->path, &st) < 0) { + log_error("stat(%s) failed: %m", i->path); + return -errno; + } - if (fchown(fd, - uid_set ? uid : (uid_t) -1, - gid_set ? gid : (gid_t) -1) < 0) { - log_error("chown(%s) failed: %m", path); - goto finish; - } + if (!S_ISDIR(st.st_mode)) { + log_error("%s is not a directory.", i->path); + return -EEXIST; } - } else if (type == 'd') { - mode_t u; - int r; - struct stat st; + r = item_set_perms(i, i->path); + if (r < 0) + return r; + + break; + + case CREATE_FIFO: + + u = umask(0); + r = mkfifo(i->path, i->mode); + umask(u); + + if (r < 0 && errno != EEXIST) { + log_error("Failed to create fifo %s: %m", i->path); + return -errno; + } + + if (stat(i->path, &st) < 0) { + log_error("stat(%s) failed: %m", i->path); + return -errno; + } + + if (!S_ISFIFO(st.st_mode)) { + log_error("%s is not a fifo.", i->path); + return -EEXIST; + } + + r = item_set_perms(i, i->path); + if (r < 0) + return r; + + break; + + case CREATE_SYMLINK: { + char *x; + + r = symlink(i->argument, i->path); + if (r < 0 && errno != EEXIST) { + log_error("symlink(%s, %s) failed: %m", i->argument, i->path); + return -errno; + } + + r = readlink_malloc(i->path, &x); + if (r < 0) { + log_error("readlink(%s) failed: %s", i->path, strerror(-r)); + return -errno; + } + + if (!streq(i->argument, x)) { + free(x); + log_error("%s is not the right symlinks.", i->path); + return -EEXIST; + } + + free(x); + break; + } + + case CREATE_BLOCK_DEVICE: + case CREATE_CHAR_DEVICE: { u = umask(0); - r = mkdir(path, mode); + r = mknod(i->path, i->mode | (i->type == CREATE_BLOCK_DEVICE ? S_IFBLK : S_IFCHR), i->major_minor); umask(u); if (r < 0 && errno != EEXIST) { - log_error("Failed to create directory %s: %m", path); + log_error("Failed to create device node %s: %m", i->path); + return -errno; + } + + if (stat(i->path, &st) < 0) { + log_error("stat(%s) failed: %m", i->path); + return -errno; + } + + if (i->type == CREATE_BLOCK_DEVICE ? !S_ISBLK(st.st_mode) : !S_ISCHR(st.st_mode)) { + log_error("%s is not a device node.", i->path); + return -EEXIST; + } + + r = item_set_perms(i, i->path); + if (r < 0) + return r; + + break; + } + + case RELABEL_PATH: + + r = glob_item(i, item_set_perms); + if (r < 0) + return 0; + break; + + case RECURSIVE_RELABEL_PATH: + + r = glob_item(i, recursive_relabel); + if (r < 0) + return r; + } + + log_debug("%s created successfully.", i->path); + + return 0; +} + +static int remove_item_instance(Item *i, const char *instance) { + int r; + + assert(i); + + switch (i->type) { + + case CREATE_FILE: + case TRUNCATE_FILE: + case CREATE_DIRECTORY: + case CREATE_FIFO: + case CREATE_SYMLINK: + case CREATE_BLOCK_DEVICE: + case CREATE_CHAR_DEVICE: + case IGNORE_PATH: + case RELABEL_PATH: + case RECURSIVE_RELABEL_PATH: + break; + + case REMOVE_PATH: + if (remove(instance) < 0 && errno != ENOENT) { + log_error("remove(%s): %m", instance); + return -errno; + } + + break; + + case TRUNCATE_DIRECTORY: + case RECURSIVE_REMOVE_PATH: + r = rm_rf(instance, false, i->type == RECURSIVE_REMOVE_PATH, false); + if (r < 0 && r != -ENOENT) { + log_error("rm_rf(%s): %s", instance, strerror(-r)); + return r; + } + + break; + } + + return 0; +} + +static int remove_item(Item *i) { + int r = 0; + + assert(i); + + switch (i->type) { + + case CREATE_FILE: + case TRUNCATE_FILE: + case CREATE_DIRECTORY: + case CREATE_FIFO: + case CREATE_SYMLINK: + case CREATE_CHAR_DEVICE: + case CREATE_BLOCK_DEVICE: + case IGNORE_PATH: + case RELABEL_PATH: + case RECURSIVE_RELABEL_PATH: + break; + + case REMOVE_PATH: + case TRUNCATE_DIRECTORY: + case RECURSIVE_REMOVE_PATH: + r = glob_item(i, remove_item_instance); + break; + } + + return r; +} + +static int process_item(Item *i) { + int r, q, p; + + assert(i); + + r = arg_create ? create_item(i) : 0; + q = arg_remove ? remove_item(i) : 0; + p = arg_clean ? clean_item(i) : 0; + + if (r < 0) + return r; + + if (q < 0) + return q; + + return p; +} + +static void item_free(Item *i) { + assert(i); + + free(i->path); + free(i->argument); + free(i); +} + +static bool item_equal(Item *a, Item *b) { + assert(a); + assert(b); + + if (!streq_ptr(a->path, b->path)) + return false; + + if (a->type != b->type) + return false; + + if (a->uid_set != b->uid_set || + (a->uid_set && a->uid != b->uid)) + return false; + + if (a->gid_set != b->gid_set || + (a->gid_set && a->gid != b->gid)) + return false; + + if (a->mode_set != b->mode_set || + (a->mode_set && a->mode != b->mode)) + return false; + + if (a->age_set != b->age_set || + (a->age_set && a->age != b->age)) + return false; + + if (a->type == CREATE_SYMLINK && + !streq(a->argument, b->argument)) + return false; + + if ((a->type == CREATE_CHAR_DEVICE || + a->type == CREATE_BLOCK_DEVICE) && + a->major_minor != b->major_minor) + return false; + + return true; +} + +static int parse_line(const char *fname, unsigned line, const char *buffer) { + Item *i, *existing; + char *mode = NULL, *user = NULL, *group = NULL, *age = NULL; + char type; + Hashmap *h; + int r; + + assert(fname); + assert(line >= 1); + assert(buffer); + + i = new0(Item, 1); + if (!i) { + log_error("Out of memory"); + return -ENOMEM; + } + + if (sscanf(buffer, + "%c " + "%ms " + "%ms " + "%ms " + "%ms " + "%ms " + "%ms", + &type, + &i->path, + &mode, + &user, + &group, + &age, + &i->argument) < 2) { + log_error("[%s:%u] Syntax error.", fname, line); + r = -EIO; + goto finish; + } + + switch(type) { + + case CREATE_FILE: + case TRUNCATE_FILE: + case CREATE_DIRECTORY: + case TRUNCATE_DIRECTORY: + case CREATE_FIFO: + case IGNORE_PATH: + case REMOVE_PATH: + case RECURSIVE_REMOVE_PATH: + case RELABEL_PATH: + case RECURSIVE_RELABEL_PATH: + break; + + case CREATE_SYMLINK: + if (!i->argument) { + log_error("[%s:%u] Symlink file requires argument.", fname, line); + r = -EBADMSG; goto finish; } + break; - if (stat(path, &st) < 0) { - log_error("stat(%s) failed: %m", path); + case CREATE_CHAR_DEVICE: + case CREATE_BLOCK_DEVICE: { + unsigned major, minor; + + if (!i->argument) { + log_error("[%s:%u] Device file requires argument.", fname, line); + r = -EBADMSG; goto finish; } - if (!S_ISDIR(st.st_mode)) { - log_error("%s is not a directory.", path); + if (sscanf(i->argument, "%u:%u", &major, &minor) != 2) { + log_error("[%s:%u] Can't parse device file major/minor '%s'.", fname, line, i->argument); + r = -EBADMSG; goto finish; } - if (chmod(path, mode) < 0) { - log_error("chmod(%s) failed: %m", path); + i->major_minor = makedev(major, minor); + break; + } + + default: + log_error("[%s:%u] Unknown file type '%c'.", fname, line, type); + r = -EBADMSG; + goto finish; + } + + i->type = type; + + if (!path_is_absolute(i->path)) { + log_error("[%s:%u] Path '%s' not absolute.", fname, line, i->path); + r = -EBADMSG; + goto finish; + } + + path_kill_slashes(i->path); + + if (arg_prefix && !path_startswith(i->path, arg_prefix)) { + r = 0; + goto finish; + } + + if (user && !streq(user, "-")) { + const char *u = user; + + r = get_user_creds(&u, &i->uid, NULL, NULL); + if (r < 0) { + log_error("[%s:%u] Unknown user '%s'.", fname, line, user); goto finish; } - if (uid_set || gid_set) { + i->uid_set = true; + } - if (chown(path, - uid_set ? uid : (uid_t) -1, - gid_set ? gid : (gid_t) -1) < 0) { - log_error("chown(%s) failed: %m", path); - goto finish; - } + if (group && !streq(group, "-")) { + const char *g = group; + + r = get_group_creds(&g, &i->gid); + if (r < 0) { + log_error("[%s:%u] Unknown group '%s'.", fname, line, group); + goto finish; } + + i->gid_set = true; } - label_fix(path); + if (mode && !streq(mode, "-")) { + unsigned m; + + if (sscanf(mode, "%o", &m) != 1) { + log_error("[%s:%u] Invalid mode '%s'.", fname, line, mode); + r = -ENOENT; + goto finish; + } + + i->mode = m; + i->mode_set = true; + } else + i->mode = + i->type == CREATE_DIRECTORY || + i->type == TRUNCATE_DIRECTORY ? 0755 : 0644; + + if (age && !streq(age, "-")) { + if (parse_usec(age, &i->age) < 0) { + log_error("[%s:%u] Invalid age '%s'.", fname, line, age); + r = -EBADMSG; + goto finish; + } + + i->age_set = true; + } - log_debug("%s created successfully.", path); + h = needs_glob(i->type) ? globs : items; + + existing = hashmap_get(h, i->path); + if (existing) { + + /* Two identical items are fine */ + if (!item_equal(existing, i)) + log_warning("Two or more conflicting lines for %s configured, ignoring.", i->path); + + r = 0; + goto finish; + } + + r = hashmap_put(h, i->path, i); + if (r < 0) { + log_error("Failed to insert item %s: %s", i->path, strerror(-r)); + goto finish; + } + + i = NULL; + r = 0; finish: - free(path); free(user); free(group); + free(mode); + free(age); - if (fd >= 0) - close_nointr_nofail(fd); + if (i) + item_free(i); + + return r; } -static int scandir_filter(const struct dirent *d) { - assert(d); +static int help(void) { - if (ignore_file(d->d_name)) - return 0; + 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" + " --create Create marked files/directories\n" + " --clean Clean up marked directories\n" + " --remove Remove marked files/directories\n" + " --prefix=PATH Only apply rules that apply to paths with the specified prefix\n", + program_invocation_short_name); - if (d->d_type != DT_REG && - d->d_type != DT_LNK) - return 0; + return 0; +} + +static int parse_argv(int argc, char *argv[]) { + + enum { + ARG_CREATE, + ARG_CLEAN, + ARG_REMOVE, + ARG_PREFIX + }; + + static const struct option options[] = { + { "help", no_argument, NULL, 'h' }, + { "create", no_argument, NULL, ARG_CREATE }, + { "clean", no_argument, NULL, ARG_CLEAN }, + { "remove", no_argument, NULL, ARG_REMOVE }, + { "prefix", required_argument, NULL, ARG_PREFIX }, + { NULL, 0, NULL, 0 } + }; + + int c; + + assert(argc >= 0); + assert(argv); + + while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) { + + switch (c) { + + case 'h': + help(); + return 0; + + case ARG_CREATE: + arg_create = true; + break; + + case ARG_CLEAN: + arg_clean = true; + break; - return endswith(d->d_name, ".conf"); + case ARG_REMOVE: + arg_remove = true; + break; + + case ARG_PREFIX: + arg_prefix = optarg; + break; + + case '?': + return -EINVAL; + + default: + log_error("Unknown option code %c", c); + return -EINVAL; + } + } + + if (!arg_clean && !arg_create && !arg_remove) { + log_error("You need to specify at least one of --clean, --create or --remove."); + return -EINVAL; + } + + return 1; +} + +static int read_config_file(const char *fn, bool ignore_enoent) { + FILE *f; + unsigned v = 0; + int r = 0; + + assert(fn); + + f = fopen(fn, "re"); + if (!f) { + + if (ignore_enoent && errno == ENOENT) + return 0; + + log_error("Failed to open %s: %m", fn); + return -errno; + } + + log_debug("apply: %s\n", fn); + for (;;) { + char line[LINE_MAX], *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; + } + + if (ferror(f)) { + log_error("Failed to read from file %s: %m", fn); + if (r == 0) + r = -EIO; + } + + fclose(f); + + return r; } int main(int argc, char *argv[]) { - struct dirent **de = NULL; - int r = EXIT_FAILURE, n, i; - const char *prefix = NULL; - - if (argc > 2) { - log_error("This program takes no more than one argument."); - return EXIT_FAILURE; - } else if (argc > 1) - prefix = argv[1]; - else - prefix = "/"; - - log_set_target(LOG_TARGET_SYSLOG_OR_KMSG); + int r; + Item *i; + Iterator iterator; + + r = parse_argv(argc, argv); + if (r <= 0) + return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; + + log_set_target(LOG_TARGET_AUTO); log_parse_environment(); log_open(); - label_init(); + umask(0022); - if ((n = scandir("/etc/tempfiles.d/", &de, scandir_filter, alphasort)) < 0) { + label_init(); - if (errno == ENOENT) - r = EXIT_SUCCESS; - else - log_error("Failed to enumerate /etc/tempfiles.d/ files: %m"); + items = hashmap_new(string_hash_func, string_compare_func); + globs = hashmap_new(string_hash_func, string_compare_func); + if (!items || !globs) { + log_error("Out of memory"); + r = EXIT_FAILURE; goto finish; } r = EXIT_SUCCESS; - for (i = 0; i < n; i++) { - int k; - char *fn; - FILE *f; - unsigned j; - - k = asprintf(&fn, "/etc/tempfiles.d/%s", de[i]->d_name); - free(de[i]); + if (optind < argc) { + int j; - if (k < 0) { - log_error("Failed to allocate file name."); - r = EXIT_FAILURE; - continue; - } + for (j = optind; j < argc; j++) + if (read_config_file(argv[j], false) < 0) + r = EXIT_FAILURE; - f = fopen(fn, "re"); - free(fn); + } else { + char **files, **f; - if (!f) { - log_error("Failed to open %s: %m", fn); + r = conf_files_list(&files, ".conf", + "/run/tmpfiles.d", + "/etc/tmpfiles.d", + "/usr/local/lib/tmpfiles.d", + "/usr/lib/tmpfiles.d", + NULL); + if (r < 0) { r = EXIT_FAILURE; - continue; + log_error("Failed to enumerate tmpfiles.d files: %s", strerror(-r)); + goto finish; } - j = 0; - for (;;) { - char line[LINE_MAX], *l; + STRV_FOREACH(f, files) { + if (read_config_file(*f, true) < 0) + r = EXIT_FAILURE; + } - if (!(fgets(line, sizeof(line), f))) - break; + strv_free(files); + } - j++; + HASHMAP_FOREACH(i, globs, iterator) + process_item(i); - l = strstrip(line); - if (*l == '#' || *l == 0) - continue; + HASHMAP_FOREACH(i, items, iterator) + process_item(i); - process_line(de[i]->d_name, j, l, prefix); - } +finish: + while ((i = hashmap_steal_first(items))) + item_free(i); - if (ferror(f)) { - r = EXIT_FAILURE; - log_error("Failed to read from file: %m"); - } + while ((i = hashmap_steal_first(globs))) + item_free(i); - fclose(f); - } + hashmap_free(items); + hashmap_free(globs); - free(de); + set_free_free(unix_sockets); -finish: + label_finish(); return r; }