X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Ftmpfiles%2Ftmpfiles.c;h=332ddcea766c7a3b01ef4d178841c8d451c05478;hp=34a644b26ba0e7ec36cd1c1b9656b5ded5108efd;hb=2695c5c44e028d1bc07404baf3357e5a6017fc57;hpb=da927ba997d68401563b927f92e6e40e021a8e5c diff --git a/src/tmpfiles/tmpfiles.c b/src/tmpfiles/tmpfiles.c index 34a644b26..332ddcea7 100644 --- a/src/tmpfiles/tmpfiles.c +++ b/src/tmpfiles/tmpfiles.c @@ -38,7 +38,7 @@ #include #include #include -#include +#include #include "log.h" #include "util.h" @@ -54,6 +54,8 @@ #include "specifier.h" #include "build.h" #include "copy.h" +#include "selinux-util.h" +#include "btrfs-util.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 @@ -66,11 +68,13 @@ typedef enum ItemType { TRUNCATE_FILE = 'F', CREATE_DIRECTORY = 'd', TRUNCATE_DIRECTORY = 'D', + CREATE_SUBVOLUME = 'v', CREATE_FIFO = 'p', CREATE_SYMLINK = 'L', CREATE_CHAR_DEVICE = 'c', CREATE_BLOCK_DEVICE = 'b', COPY_FILES = 'C', + SET_XATTR = 't', /* These ones take globs */ WRITE_FILE = 'w', @@ -88,6 +92,7 @@ typedef struct Item { char *path; char *argument; + char **xattrs; uid_t uid; gid_t gid; mode_t mode; @@ -225,10 +230,7 @@ static bool unix_socket_alive(const char *fn) { static int dir_is_mount_point(DIR *d, const char *subdir) { - union file_handle_union h = { - .handle.handle_bytes = MAX_HANDLE_SZ - }; - + union file_handle_union h = FILE_HANDLE_INIT; int mount_id_parent, mount_id; int r_p, r; @@ -291,9 +293,9 @@ 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; } @@ -341,7 +343,7 @@ 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; } @@ -374,7 +376,7 @@ 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; } } @@ -422,7 +424,7 @@ 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; } } @@ -438,7 +440,7 @@ 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; @@ -469,26 +471,85 @@ static int item_set_perms(Item *i, const char *path) { } if (!st_valid || m != (st.st_mode & 07777)) { - if (chmod(path, m) < 0) { - log_error("chmod(%s) failed: %m", path); - return -errno; - } + if (chmod(path, m) < 0) + return log_error_errno(errno, "chmod(%s) failed: %m", path); } } 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; @@ -510,7 +571,7 @@ static int write_one_file(Item *i, const char *path) { 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; } @@ -534,10 +595,8 @@ 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); @@ -548,6 +607,10 @@ 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; } @@ -628,7 +691,7 @@ 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; } @@ -667,20 +730,14 @@ static int create_item(Item *i) { if (r < 0) { struct stat a, b; - if (r != -EEXIST) { - log_error_errno(r, "Failed to copy files to %s: %m", i->path); - 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); @@ -701,24 +758,30 @@ static int create_item(Item *i) { break; - case TRUNCATE_DIRECTORY: case CREATE_DIRECTORY: + case TRUNCATE_DIRECTORY: + case CREATE_SUBVOLUME: - RUN_WITH_UMASK(0000) { + RUN_WITH_UMASK(0000) mkdir_parents_label(i->path, 0755); - r = mkdir_label(i->path, i->mode); + + if (i->type == CREATE_SUBVOLUME) { + RUN_WITH_UMASK((~i->mode) & 0777) + r = btrfs_subvol_make(i->path); + } else + r = 0; + + if (i->type == CREATE_DIRECTORY || i->type == TRUNCATE_DIRECTORY || r == -ENOTTY) { + RUN_WITH_UMASK(0000) + r = mkdir_label(i->path, i->mode); } if (r < 0) { - if (r != -EEXIST) { - log_error_errno(r, "Failed to create directory %s: %m", i->path); - return r; - } + if (r != -EEXIST) + return log_error_errno(r, "Failed to create directory or subvolume %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); @@ -730,6 +793,10 @@ static int create_item(Item *i) { if (r < 0) return r; + r = item_set_xattrs(i, i->path); + if (r < 0) + return r; + break; case CREATE_FIFO: @@ -741,15 +808,11 @@ static int create_item(Item *i) { } 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)) { @@ -761,10 +824,8 @@ static int create_item(Item *i) { mac_selinux_create_file_clear(); } - if (r < 0) { - log_error_errno(r, "Failed to create fifo %s: %m", i->path); - 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; @@ -776,6 +837,10 @@ static int create_item(Item *i) { if (r < 0) return r; + r = item_set_xattrs(i, i->path); + if (r < 0) + return r; + break; case CREATE_SYMLINK: @@ -787,10 +852,8 @@ static int create_item(Item *i) { 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)) { @@ -800,10 +863,8 @@ static int create_item(Item *i) { r = symlink_atomic(i->argument, i->path); mac_selinux_create_file_clear(); - if (r < 0) { - log_error_errno(r, "symlink(%s, %s) failed: %m", i->argument, i->path); - 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; @@ -811,6 +872,10 @@ static int create_item(Item *i) { } } + r = item_set_xattrs(i, i->path); + if (r < 0) + return r; + break; case CREATE_BLOCK_DEVICE: @@ -842,15 +907,11 @@ 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) { @@ -862,10 +923,8 @@ static int create_item(Item *i) { mac_selinux_create_file_clear(); } - if (r < 0) { - log_error_errno(r, "Failed to create device node %s: %m", i->path); - 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; @@ -877,6 +936,10 @@ static int create_item(Item *i) { if (r < 0) return r; + r = item_set_xattrs(i, i->path); + if (r < 0) + return r; + break; } @@ -893,7 +956,12 @@ 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; } @@ -912,6 +980,7 @@ static int remove_item_instance(Item *i, const char *instance) { case CREATE_FILE: case TRUNCATE_FILE: case CREATE_DIRECTORY: + case CREATE_SUBVOLUME: case CREATE_FIFO: case CREATE_SYMLINK: case CREATE_BLOCK_DEVICE: @@ -923,13 +992,12 @@ 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; @@ -938,10 +1006,8 @@ 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_errno(r, "rm_rf(%s): %m", instance); - return r; - } + if (r < 0 && r != -ENOENT) + return log_error_errno(r, "rm_rf(%s): %m", instance); break; } @@ -959,6 +1025,7 @@ static int remove_item(Item *i) { case CREATE_FILE: case TRUNCATE_FILE: case CREATE_DIRECTORY: + case CREATE_SUBVOLUME: case CREATE_FIFO: case CREATE_SYMLINK: case CREATE_CHAR_DEVICE: @@ -970,6 +1037,7 @@ static int remove_item(Item *i) { case RECURSIVE_RELABEL_PATH: case WRITE_FILE: case COPY_FILES: + case SET_XATTR: break; case REMOVE_PATH: @@ -1005,24 +1073,20 @@ 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); @@ -1039,6 +1103,7 @@ static int clean_item(Item *i) { switch (i->type) { case CREATE_DIRECTORY: + case CREATE_SUBVOLUME: case TRUNCATE_DIRECTORY: case IGNORE_PATH: case COPY_FILES: @@ -1055,7 +1120,7 @@ static int clean_item(Item *i) { } static int process_item(Item *i) { - int r, q, p; + int r, q, p, t = 0; _cleanup_free_ char *prefix = NULL; assert(i); @@ -1073,21 +1138,23 @@ static int process_item(Item *i) { Item *j; j = hashmap_get(items, prefix); - if (j) - process_item(j); + if (j) { + int s; + + s = process_item(j); + if (s < 0 && t == 0) + t = s; + } } 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; + return t < 0 ? t : + r < 0 ? r : + q < 0 ? q : + p; } static void item_free(Item *i) { @@ -1097,6 +1164,7 @@ static void item_free(Item *i) { free(i->path); free(i->argument); + strv_free(i->xattrs); free(i); } @@ -1236,6 +1304,7 @@ static int parse_line(const char *fname, unsigned line, const char *buffer) { case CREATE_FILE: case TRUNCATE_FILE: case CREATE_DIRECTORY: + case CREATE_SUBVOLUME: case TRUNCATE_DIRECTORY: case CREATE_FIFO: case IGNORE_PATH: @@ -1295,6 +1364,16 @@ 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; @@ -1366,6 +1445,7 @@ static int parse_line(const char *fname, unsigned line, const char *buffer) { } else i->mode = i->type == CREATE_DIRECTORY || + i->type == CREATE_SUBVOLUME || i->type == TRUNCATE_DIRECTORY ? 0755 : 0644; if (age && !streq(age, "-")) { @@ -1388,18 +1468,33 @@ 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_errno(r, "Failed to insert item %s: %m", i->path); - 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 */ @@ -1531,8 +1626,7 @@ static int read_config_file(const char *fn, bool ignore_enoent) { if (ignore_enoent && r == -ENOENT) return 0; - log_error_errno(r, "Failed to open '%s', ignoring: %m", fn); - return r; + return log_error_errno(r, "Failed to open '%s', ignoring: %m", fn); } FOREACH_LINE(line, f, break) { @@ -1559,7 +1653,7 @@ static int read_config_file(const char *fn, bool ignore_enoent) { continue; HASHMAP_FOREACH(j, items, iter) { - if (j->type != CREATE_DIRECTORY && j->type != TRUNCATE_DIRECTORY) + if (j->type != CREATE_DIRECTORY && j->type != TRUNCATE_DIRECTORY && j->type != CREATE_SUBVOLUME) continue; if (path_equal(j->path, i->path)) { @@ -1579,7 +1673,7 @@ static int read_config_file(const char *fn, bool ignore_enoent) { } 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; } @@ -1640,11 +1734,17 @@ int main(int argc, char *argv[]) { } } - HASHMAP_FOREACH(i, globs, iterator) - process_item(i); + HASHMAP_FOREACH(i, globs, iterator) { + k = process_item(i); + if (k < 0 && r == 0) + r = k; + } - HASHMAP_FOREACH(i, items, iterator) - process_item(i); + HASHMAP_FOREACH(i, items, iterator) { + k = process_item(i); + if (k < 0 && r == 0) + r = k; + } finish: while ((i = hashmap_steal_first(items)))