X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=src%2Ftmpfiles%2Ftmpfiles.c;h=d40bd96f1b4169fc1f6c55cfcb0eeec42fefc342;hb=32bc8adcd836baff68e4d0f53b9a382f358cccf8;hp=68cfa55ce9cee09e96985c76ac2390cfbe5140f7;hpb=2f3b873a49734f8ecc8d929612d33153acbda891;p=elogind.git diff --git a/src/tmpfiles/tmpfiles.c b/src/tmpfiles/tmpfiles.c index 68cfa55ce..d40bd96f1 100644 --- a/src/tmpfiles/tmpfiles.c +++ b/src/tmpfiles/tmpfiles.c @@ -39,6 +39,7 @@ #include #include #include +#include #include "log.h" #include "util.h" @@ -71,6 +72,7 @@ typedef enum ItemType { CREATE_CHAR_DEVICE = 'c', CREATE_BLOCK_DEVICE = 'b', COPY_FILES = 'C', + SET_XATTR = 't', /* These ones take globs */ WRITE_FILE = 'w', @@ -88,6 +90,7 @@ typedef struct Item { char *path; char *argument; + char **xattrs; uid_t uid; gid_t gid; mode_t mode; @@ -117,15 +120,7 @@ static char **arg_include_prefixes = NULL; static char **arg_exclude_prefixes = NULL; static char *arg_root = NULL; -static const char conf_file_dirs[] = - "/etc/tmpfiles.d\0" - "/run/tmpfiles.d\0" - "/usr/local/lib/tmpfiles.d\0" - "/usr/lib/tmpfiles.d\0" -#ifdef HAVE_SPLIT_USR - "/lib/tmpfiles.d\0" -#endif - ; +static const char conf_file_dirs[] = CONF_DIRS_NULSTR("tmpfiles"); #define MAX_DEPTH 256 @@ -165,7 +160,7 @@ static void load_unix_sockets(void) { /* 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); + unix_sockets = set_new(&string_hash_ops); if (!unix_sockets) return; @@ -259,7 +254,7 @@ static int dir_is_mount_point(DIR *d, const char *subdir) { /* got only one handle; assume different mount points if one * of both queries was not supported by the filesystem */ - if (r_p == -ENOSYS || r_p == -ENOTSUP || r == -ENOSYS || r == -ENOTSUP) + if (r_p == -ENOSYS || r_p == -EOPNOTSUPP || r == -ENOSYS || r == -EOPNOTSUPP) return true; /* return error */ @@ -299,9 +294,9 @@ static int dir_cleanup( /* FUSE, NFS mounts, SELinux might return EACCES */ if (errno == EACCES) - log_debug("stat(%s/%s) failed: %m", p, dent->d_name); + log_debug_errno(errno, "stat(%s/%s) failed: %m", p, dent->d_name); else - log_error("stat(%s/%s) failed: %m", p, dent->d_name); + log_error_errno(errno, "stat(%s/%s) failed: %m", p, dent->d_name); r = -errno; continue; } @@ -349,7 +344,7 @@ static int dir_cleanup( sub_dir = xopendirat(dirfd(d), dent->d_name, O_NOFOLLOW|O_NOATIME); if (!sub_dir) { if (errno != ENOENT) { - log_error("opendir(%s/%s) failed: %m", p, dent->d_name); + log_error_errno(errno, "opendir(%s/%s) failed: %m", p, dent->d_name); r = -errno; } @@ -382,7 +377,7 @@ static int dir_cleanup( if (unlinkat(dirfd(d), dent->d_name, AT_REMOVEDIR) < 0) { if (errno != ENOENT && errno != ENOTEMPTY) { - log_error("rmdir(%s): %m", sub_path); + log_error_errno(errno, "rmdir(%s): %m", sub_path); r = -errno; } } @@ -430,7 +425,7 @@ static int dir_cleanup( if (unlinkat(dirfd(d), dent->d_name, 0) < 0) { if (errno != ENOENT) { - log_error("unlink(%s): %m", sub_path); + log_error_errno(errno, "unlink(%s): %m", sub_path); r = -errno; } } @@ -446,53 +441,116 @@ finish: times[1] = ds->st_mtim; if (futimens(dirfd(d), times) < 0) - log_error("utimensat(%s): %m", p); + log_error_errno(errno, "utimensat(%s): %m", p); } return r; } static int item_set_perms(Item *i, const char *path) { + struct stat st; + bool st_valid; + assert(i); assert(path); + st_valid = stat(path, &st) == 0; + /* not using i->path directly because it may be a glob */ if (i->mode_set) { mode_t m = i->mode; - if (i->mask_perms) { - struct stat st; - - if (stat(path, &st) >= 0) { - if (!(st.st_mode & 0111)) - m &= ~0111; - if (!(st.st_mode & 0222)) - m &= ~0222; - if (!(st.st_mode & 0444)) - m &= ~0444; - if (!S_ISDIR(st.st_mode)) - m &= ~07000; /* remove sticky/sgid/suid bit, unless directory */ - } + if (i->mask_perms && st_valid) { + if (!(st.st_mode & 0111)) + m &= ~0111; + if (!(st.st_mode & 0222)) + m &= ~0222; + if (!(st.st_mode & 0444)) + m &= ~0444; + if (!S_ISDIR(st.st_mode)) + m &= ~07000; /* remove sticky/sgid/suid bit, unless directory */ } - if (chmod(path, m) < 0) { - log_error("chmod(%s) failed: %m", path); - return -errno; + if (!st_valid || m != (st.st_mode & 07777)) { + if (chmod(path, m) < 0) + return log_error_errno(errno, "chmod(%s) failed: %m", path); } } - if (i->uid_set || i->gid_set) + if ((!st_valid || (i->uid != st.st_uid || i->gid != st.st_gid)) && + (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) { + i->uid_set ? i->uid : UID_INVALID, + i->gid_set ? i->gid : GID_INVALID) < 0) { - log_error("chown(%s) failed: %m", path); + log_error_errno(errno, "chown(%s) failed: %m", path); return -errno; } return label_fix(path, false, false); } +static int get_xattrs_from_arg(Item *i) { + char *xattr; + const char *p; + int r; + + assert(i); + + if (!i->argument) { + log_error("%s: Argument can't be empty!", i->path); + return -EBADMSG; + } + p = i->argument; + + while ((r = unquote_first_word(&p, &xattr, false)) > 0) { + _cleanup_free_ char *tmp = NULL, *name = NULL, *value = NULL; + r = split_pair(xattr, "=", &name, &value); + if (r < 0) { + log_warning("Illegal xattr found: \"%s\" - ignoring.", xattr); + free(xattr); + continue; + } + free(xattr); + if (streq(name, "") || streq(value, "")) { + log_warning("Malformed xattr found: \"%s=%s\" - ignoring.", name, value); + continue; + } + tmp = unquote(value, "\""); + if (!tmp) + return log_oom(); + free(value); + value = cunescape(tmp); + if (!value) + return log_oom(); + if (strv_consume_pair(&i->xattrs, name, value) < 0) + return log_oom(); + name = value = NULL; + } + + return r; +} + +static int item_set_xattrs(Item *i, const char *path) { + char **name, **value; + + assert(i); + assert(path); + + if (strv_isempty(i->xattrs)) + return 0; + + STRV_FOREACH_PAIR(name, value, i->xattrs) { + int n; + n = strlen(*value); + if (lsetxattr(path, *name, *value, n, 0) < 0) { + log_error("Setting extended attribute %s=%s on %s failed: %m", *name, *value, path); + return -errno; + } + } + return 0; +} + static int write_one_file(Item *i, const char *path) { _cleanup_close_ int fd = -1; int flags, r = 0; @@ -505,16 +563,16 @@ static int write_one_file(Item *i, const char *path) { i->type == TRUNCATE_FILE ? O_CREAT|O_TRUNC|O_NOFOLLOW : 0; RUN_WITH_UMASK(0000) { - label_context_set(path, S_IFREG); + mac_selinux_create_file_prepare(path, S_IFREG); fd = open(path, flags|O_NDELAY|O_CLOEXEC|O_WRONLY|O_NOCTTY, i->mode); - label_context_clear(); + mac_selinux_create_file_clear(); } if (fd < 0) { if (i->type == WRITE_FILE && errno == ENOENT) return 0; - log_error("Failed to create file %s: %m", path); + log_error_errno(errno, "Failed to create file %s: %m", path); return -errno; } @@ -538,10 +596,8 @@ static int write_one_file(Item *i, const char *path) { fd = safe_close(fd); - if (stat(path, &st) < 0) { - log_error("stat(%s) failed: %m", path); - return -errno; - } + if (stat(path, &st) < 0) + return log_error_errno(errno, "stat(%s) failed: %m", path); if (!S_ISREG(st.st_mode)) { log_error("%s is not a file.", path); @@ -552,6 +608,10 @@ static int write_one_file(Item *i, const char *path) { if (r < 0) return r; + r = item_set_xattrs(i, i->path); + if (r < 0) + return r; + return 0; } @@ -632,7 +692,7 @@ static int glob_item(Item *i, int (*action)(Item *, const char *)) { if (errno == 0) errno = EIO; - log_error("glob(%s) failed: %m", i->path); + log_error_errno(errno, "glob(%s) failed: %m", i->path); return -errno; } @@ -671,20 +731,14 @@ static int create_item(Item *i) { if (r < 0) { struct stat a, b; - if (r != -EEXIST) { - log_error("Failed to copy files to %s: %s", i->path, strerror(-r)); - return -r; - } + if (r != -EEXIST) + return log_error_errno(r, "Failed to copy files to %s: %m", i->path); - if (stat(i->argument, &a) < 0) { - log_error("stat(%s) failed: %m", i->argument); - return -errno; - } + if (stat(i->argument, &a) < 0) + return log_error_errno(errno, "stat(%s) failed: %m", i->argument); - if (stat(i->path, &b) < 0) { - log_error("stat(%s) failed: %m", i->path); - return -errno; - } + if (stat(i->path, &b) < 0) + return log_error_errno(errno, "stat(%s) failed: %m", i->path); if ((a.st_mode ^ b.st_mode) & S_IFMT) { log_debug("Can't copy to %s, file exists already and is of different type", i->path); @@ -714,15 +768,11 @@ static int create_item(Item *i) { } if (r < 0) { - if (r != -EEXIST) { - log_error("Failed to create directory %s: %s", i->path, strerror(-r)); - return r; - } + if (r != -EEXIST) + return log_error_errno(r, "Failed to create directory %s: %m", i->path); - if (stat(i->path, &st) < 0) { - log_error("stat(%s) failed: %m", i->path); - return -errno; - } + if (stat(i->path, &st) < 0) + return log_error_errno(errno, "stat(%s) failed: %m", i->path); if (!S_ISDIR(st.st_mode)) { log_debug("%s already exists and is not a directory.", i->path); @@ -734,41 +784,39 @@ static int create_item(Item *i) { if (r < 0) return r; + r = item_set_xattrs(i, i->path); + if (r < 0) + return r; + break; case CREATE_FIFO: RUN_WITH_UMASK(0000) { - label_context_set(i->path, S_IFIFO); + mac_selinux_create_file_prepare(i->path, S_IFIFO); r = mkfifo(i->path, i->mode); - label_context_clear(); + mac_selinux_create_file_clear(); } if (r < 0) { - if (errno != EEXIST) { - log_error("Failed to create fifo %s: %m", i->path); - return -errno; - } + if (errno != EEXIST) + return log_error_errno(errno, "Failed to create fifo %s: %m", i->path); - if (stat(i->path, &st) < 0) { - log_error("stat(%s) failed: %m", i->path); - return -errno; - } + if (stat(i->path, &st) < 0) + return log_error_errno(errno, "stat(%s) failed: %m", i->path); if (!S_ISFIFO(st.st_mode)) { if (i->force) { RUN_WITH_UMASK(0000) { - label_context_set(i->path, S_IFIFO); + mac_selinux_create_file_prepare(i->path, S_IFIFO); r = mkfifo_atomic(i->path, i->mode); - label_context_clear(); + mac_selinux_create_file_clear(); } - if (r < 0) { - log_error("Failed to create fifo %s: %s", i->path, strerror(-r)); - return r; - } + if (r < 0) + return log_error_errno(r, "Failed to create fifo %s: %m", i->path); } else { log_debug("%s is not a fifo.", i->path); return 0; @@ -780,34 +828,34 @@ static int create_item(Item *i) { if (r < 0) return r; + r = item_set_xattrs(i, i->path); + if (r < 0) + return r; + break; case CREATE_SYMLINK: - label_context_set(i->path, S_IFLNK); + mac_selinux_create_file_prepare(i->path, S_IFLNK); r = symlink(i->argument, i->path); - label_context_clear(); + mac_selinux_create_file_clear(); if (r < 0) { _cleanup_free_ char *x = NULL; - if (errno != EEXIST) { - log_error("symlink(%s, %s) failed: %m", i->argument, i->path); - return -errno; - } + if (errno != EEXIST) + return log_error_errno(errno, "symlink(%s, %s) failed: %m", i->argument, i->path); r = readlink_malloc(i->path, &x); if (r < 0 || !streq(i->argument, x)) { if (i->force) { - label_context_set(i->path, S_IFLNK); + mac_selinux_create_file_prepare(i->path, S_IFLNK); r = symlink_atomic(i->argument, i->path); - label_context_clear(); + mac_selinux_create_file_clear(); - if (r < 0) { - log_error("symlink(%s, %s) failed: %s", i->argument, i->path, strerror(-r)); - return r; - } + if (r < 0) + return log_error_errno(r, "symlink(%s, %s) failed: %m", i->argument, i->path); } else { log_debug("%s is not a symlink or does not point to the correct path.", i->path); return 0; @@ -815,6 +863,10 @@ static int create_item(Item *i) { } } + r = item_set_xattrs(i, i->path); + if (r < 0) + return r; + break; case CREATE_BLOCK_DEVICE: @@ -834,9 +886,9 @@ static int create_item(Item *i) { file_type = i->type == CREATE_BLOCK_DEVICE ? S_IFBLK : S_IFCHR; RUN_WITH_UMASK(0000) { - label_context_set(i->path, file_type); + mac_selinux_create_file_prepare(i->path, file_type); r = mknod(i->path, i->mode | file_type, i->major_minor); - label_context_clear(); + mac_selinux_create_file_clear(); } if (r < 0) { @@ -846,30 +898,24 @@ static int create_item(Item *i) { return 0; } - if (errno != EEXIST) { - log_error("Failed to create device node %s: %m", i->path); - return -errno; - } + if (errno != EEXIST) + return log_error_errno(errno, "Failed to create device node %s: %m", i->path); - if (stat(i->path, &st) < 0) { - log_error("stat(%s) failed: %m", i->path); - return -errno; - } + if (stat(i->path, &st) < 0) + return log_error_errno(errno, "stat(%s) failed: %m", i->path); if ((st.st_mode & S_IFMT) != file_type) { if (i->force) { RUN_WITH_UMASK(0000) { - label_context_set(i->path, file_type); + mac_selinux_create_file_prepare(i->path, file_type); r = mknod_atomic(i->path, i->mode | file_type, i->major_minor); - label_context_clear(); + mac_selinux_create_file_clear(); } - if (r < 0) { - log_error("Failed to create device node %s: %s", i->path, strerror(-r)); - return r; - } + if (r < 0) + return log_error_errno(r, "Failed to create device node %s: %m", i->path); } else { log_debug("%s is not a device node.", i->path); return 0; @@ -881,6 +927,10 @@ static int create_item(Item *i) { if (r < 0) return r; + r = item_set_xattrs(i, i->path); + if (r < 0) + return r; + break; } @@ -897,7 +947,12 @@ static int create_item(Item *i) { r = glob_item(i, item_set_perms_recursive); if (r < 0) return r; + break; + case SET_XATTR: + r = item_set_xattrs(i, i->path); + if (r < 0) + return r; break; } @@ -927,13 +982,12 @@ static int remove_item_instance(Item *i, const char *instance) { case RECURSIVE_RELABEL_PATH: case WRITE_FILE: case COPY_FILES: + case SET_XATTR: break; case REMOVE_PATH: - if (remove(instance) < 0 && errno != ENOENT) { - log_error("remove(%s): %m", instance); - return -errno; - } + if (remove(instance) < 0 && errno != ENOENT) + return log_error_errno(errno, "remove(%s): %m", instance); break; @@ -942,10 +996,8 @@ static int remove_item_instance(Item *i, const char *instance) { /* FIXME: we probably should use dir_cleanup() here * instead of rm_rf() so that 'x' is honoured. */ r = rm_rf_dangerous(instance, false, i->type == RECURSIVE_REMOVE_PATH, false); - if (r < 0 && r != -ENOENT) { - log_error("rm_rf(%s): %s", instance, strerror(-r)); - return r; - } + if (r < 0 && r != -ENOENT) + return log_error_errno(r, "rm_rf(%s): %m", instance); break; } @@ -974,6 +1026,7 @@ static int remove_item(Item *i) { case RECURSIVE_RELABEL_PATH: case WRITE_FILE: case COPY_FILES: + case SET_XATTR: break; case REMOVE_PATH: @@ -1009,24 +1062,20 @@ static int clean_item_instance(Item *i, const char* instance) { if (errno == ENOENT || errno == ENOTDIR) return 0; - log_error("Failed to open directory %s: %m", i->path); + log_error_errno(errno, "Failed to open directory %s: %m", i->path); return -errno; } - if (fstat(dirfd(d), &s) < 0) { - log_error("stat(%s) failed: %m", i->path); - return -errno; - } + if (fstat(dirfd(d), &s) < 0) + return log_error_errno(errno, "stat(%s) failed: %m", i->path); if (!S_ISDIR(s.st_mode)) { log_error("%s is not a directory.", i->path); return -ENOTDIR; } - if (fstatat(dirfd(d), "..", &ps, AT_SYMLINK_NOFOLLOW) != 0) { - log_error("stat(%s/..) failed: %m", i->path); - return -errno; - } + if (fstatat(dirfd(d), "..", &ps, AT_SYMLINK_NOFOLLOW) != 0) + return log_error_errno(errno, "stat(%s/..) failed: %m", i->path); mountpoint = s.st_dev != ps.st_dev || (s.st_dev == ps.st_dev && s.st_ino == ps.st_ino); @@ -1060,7 +1109,7 @@ static int clean_item(Item *i) { static int process_item(Item *i) { int r, q, p; - char prefix[PATH_MAX]; + _cleanup_free_ char *prefix = NULL; assert(i); @@ -1069,6 +1118,10 @@ static int process_item(Item *i) { i->done = true; + prefix = malloc(strlen(i->path) + 1); + if (!prefix) + return log_oom(); + PATH_FOREACH_PREFIX(prefix, i->path) { Item *j; @@ -1097,6 +1150,7 @@ static void item_free(Item *i) { free(i->path); free(i->argument); + strv_free(i->xattrs); free(i); } @@ -1295,6 +1349,16 @@ static int parse_line(const char *fname, unsigned line, const char *buffer) { break; } + case SET_XATTR: + if (!i->argument) { + log_error("[%s:%u] Set extended attribute requires argument.", fname, line); + return -EBADMSG; + } + r = get_xattrs_from_arg(i); + if (r < 0) + return r; + break; + default: log_error("[%s:%u] Unknown command type '%c'.", fname, line, type); return -EBADMSG; @@ -1388,18 +1452,33 @@ static int parse_line(const char *fname, unsigned line, const char *buffer) { 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); - - return 0; - } - - r = hashmap_put(h, i->path, i); - if (r < 0) { - log_error("Failed to insert item %s: %s", i->path, strerror(-r)); - return r; + if (i->type == SET_XATTR) { + r = strv_extend_strv(&existing->xattrs, i->xattrs); + if (r < 0) + return log_oom(); + return 0; + } else if (existing->type == SET_XATTR) { + r = strv_extend_strv(&i->xattrs, existing->xattrs); + if (r < 0) + return log_oom(); + r = hashmap_replace(h, i->path, i); + if (r < 0) { + log_error("Failed to replace item for %s.", i->path); + return r; + } + item_free(existing); + } else { + /* Two identical items are fine */ + if (!item_equal(existing, i)) + log_warning("Two or more conflicting lines for %s configured, ignoring.", i->path); + return 0; + } + } else { + r = hashmap_put(h, i->path, i); + if (r < 0) { + log_error("Failed to insert item %s: %s", i->path, strerror(-r)); + return r; + } } i = NULL; /* avoid cleanup */ @@ -1407,8 +1486,7 @@ static int parse_line(const char *fname, unsigned line, const char *buffer) { return 0; } -static int help(void) { - +static void 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" @@ -1421,8 +1499,6 @@ static int help(void) { " --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; } static int parse_argv(int argc, char *argv[]) { @@ -1456,12 +1532,13 @@ static int parse_argv(int argc, char *argv[]) { assert(argc >= 0); assert(argv); - while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) { + while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) switch (c) { case 'h': - return help(); + help(); + return 0; case ARG_VERSION: puts(PACKAGE_STRING); @@ -1509,7 +1586,6 @@ static int parse_argv(int argc, char *argv[]) { default: assert_not_reached("Unhandled option"); } - } if (!arg_clean && !arg_create && !arg_remove) { log_error("You need to specify at least one of --clean, --create or --remove."); @@ -1534,8 +1610,7 @@ static int read_config_file(const char *fn, bool ignore_enoent) { if (ignore_enoent && r == -ENOENT) return 0; - log_error("Failed to open '%s', ignoring: %s", fn, strerror(-r)); - return r; + return log_error_errno(r, "Failed to open '%s', ignoring: %m", fn); } FOREACH_LINE(line, f, break) { @@ -1575,14 +1650,14 @@ static int read_config_file(const char *fn, bool ignore_enoent) { candidate_item = j; } - if (candidate_item) { + if (candidate_item && candidate_item->age_set) { i->age = candidate_item->age; i->age_set = true; } } if (ferror(f)) { - log_error("Failed to read from file %s: %m", fn); + log_error_errno(errno, "Failed to read from file %s: %m", fn); if (r == 0) r = -EIO; } @@ -1605,10 +1680,10 @@ int main(int argc, char *argv[]) { umask(0022); - label_init(NULL); + mac_selinux_init(NULL); - items = hashmap_new(string_hash_func, string_compare_func); - globs = hashmap_new(string_hash_func, string_compare_func); + items = hashmap_new(&string_hash_ops); + globs = hashmap_new(&string_hash_ops); if (!items || !globs) { r = log_oom(); @@ -1632,7 +1707,7 @@ int main(int argc, char *argv[]) { 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)); + log_error_errno(r, "Failed to enumerate tmpfiles.d files: %m"); goto finish; } @@ -1665,7 +1740,7 @@ finish: set_free_free(unix_sockets); - label_finish(); + mac_selinux_finish(); return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; }