X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Ftmpfiles%2Ftmpfiles.c;h=d5639897905f6cb24471df28ae13e90cad537c7b;hp=45125b7b946ee7a2bf59d1b11d52739506bce35b;hb=081043cf06cc67a327f55806039639c55acdd439;hpb=3f2afb29140c1caa97901e5e1cd38865afb19d6e diff --git a/src/tmpfiles/tmpfiles.c b/src/tmpfiles/tmpfiles.c index 45125b7b9..d56398979 100644 --- a/src/tmpfiles/tmpfiles.c +++ b/src/tmpfiles/tmpfiles.c @@ -4,6 +4,7 @@ This file is part of systemd. Copyright 2010 Lennart Poettering, Kay Sievers + Copyright 2015 Zbigniew Jędrzejewski-Szmek systemd is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by @@ -23,7 +24,6 @@ #include #include #include -#include #include #include #include @@ -34,19 +34,30 @@ #include #include #include -#include -#include #include #include +#include +#include +#include +#include #include "log.h" #include "util.h" +#include "macro.h" +#include "missing.h" #include "mkdir.h" #include "path-util.h" #include "strv.h" #include "label.h" #include "set.h" #include "conf-files.h" +#include "capability.h" +#include "specifier.h" +#include "build.h" +#include "copy.h" +#include "selinux-util.h" +#include "btrfs-util.h" +#include "acl-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 @@ -57,20 +68,26 @@ typedef enum ItemType { /* These ones take file names */ CREATE_FILE = 'f', TRUNCATE_FILE = 'F', - WRITE_FILE = 'w', 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', + SET_ACL = 'a', /* These ones take globs */ + WRITE_FILE = 'w', IGNORE_PATH = 'x', + IGNORE_DIRECTORY_PATH = 'X', REMOVE_PATH = 'r', RECURSIVE_REMOVE_PATH = 'R', + ADJUST_MODE = 'm', /* legacy, 'z' is identical to this */ RELABEL_PATH = 'z', - RECURSIVE_RELABEL_PATH = 'Z' + RECURSIVE_RELABEL_PATH = 'Z', } ItemType; typedef struct Item { @@ -78,6 +95,11 @@ typedef struct Item { char *path; char *argument; + char **xattrs; +#ifdef HAVE_ACL + acl_t acl_access; + acl_t acl_default; +#endif uid_t uid; gid_t gid; mode_t mode; @@ -89,49 +111,89 @@ typedef struct Item { bool gid_set:1; bool mode_set:1; bool age_set:1; + bool mask_perms:1; bool keep_first_level:1; + + bool force:1; + + bool done:1; } Item; -static Hashmap *items = NULL, *globs = NULL; -static Set *unix_sockets = NULL; +typedef struct ItemArray { + Item *items; + size_t count; + size_t size; +} ItemArray; static bool arg_create = false; static bool arg_clean = false; static bool arg_remove = false; +static bool arg_boot = false; -static const char *arg_prefix = NULL; +static char **arg_include_prefixes = NULL; +static char **arg_exclude_prefixes = NULL; +static char *arg_root = NULL; -static const char * const conf_file_dirs[] = { - "/etc/tmpfiles.d", - "/run/tmpfiles.d", - "/usr/local/lib/tmpfiles.d", - "/usr/lib/tmpfiles.d", -#ifdef HAVE_SPLIT_USR - "/lib/tmpfiles.d", -#endif - NULL -}; +static const char conf_file_dirs[] = CONF_DIRS_NULSTR("tmpfiles"); #define MAX_DEPTH 256 +static Hashmap *items = NULL, *globs = NULL; +static Set *unix_sockets = NULL; + static bool needs_glob(ItemType t) { - return t == IGNORE_PATH || t == REMOVE_PATH || t == RECURSIVE_REMOVE_PATH || t == RELABEL_PATH || t == RECURSIVE_RELABEL_PATH; + return IN_SET(t, + WRITE_FILE, + IGNORE_PATH, + IGNORE_DIRECTORY_PATH, + REMOVE_PATH, + RECURSIVE_REMOVE_PATH, + ADJUST_MODE, + RELABEL_PATH, + RECURSIVE_RELABEL_PATH); +} + +static bool takes_ownership(ItemType t) { + return IN_SET(t, + CREATE_FILE, + TRUNCATE_FILE, + CREATE_DIRECTORY, + TRUNCATE_DIRECTORY, + CREATE_SUBVOLUME, + CREATE_FIFO, + CREATE_SYMLINK, + CREATE_CHAR_DEVICE, + CREATE_BLOCK_DEVICE, + COPY_FILES, + + WRITE_FILE, + IGNORE_PATH, + IGNORE_DIRECTORY_PATH, + REMOVE_PATH, + RECURSIVE_REMOVE_PATH); } static struct Item* find_glob(Hashmap *h, const char *match) { - Item *j; + ItemArray *j; Iterator i; - HASHMAP_FOREACH(j, h, i) - if (fnmatch(j->path, match, FNM_PATHNAME|FNM_PERIOD) == 0) - return j; + HASHMAP_FOREACH(j, h, i) { + unsigned n; + + for (n = 0; n < j->count; n++) { + Item *item = j->items + n; + + if (fnmatch(item->path, match, FNM_PATHNAME|FNM_PERIOD) == 0) + return item; + } + } return NULL; } static void load_unix_sockets(void) { - FILE *f = NULL; + _cleanup_fclose_ FILE *f = NULL; char line[LINE_MAX]; if (unix_sockets) @@ -140,7 +202,7 @@ 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; @@ -182,24 +244,16 @@ static void load_unix_sockets(void) { path_kill_slashes(s); - k = set_put(unix_sockets, s); - if (k < 0) { - free(s); - - if (k != -EEXIST) - goto fail; - } + k = set_consume(unix_sockets, s); + if (k < 0 && 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) { @@ -214,7 +268,42 @@ static bool unix_socket_alive(const char *fn) { return true; } +static int dir_is_mount_point(DIR *d, const char *subdir) { + + union file_handle_union h = FILE_HANDLE_INIT; + int mount_id_parent, mount_id; + int r_p, r; + + r_p = name_to_handle_at(dirfd(d), ".", &h.handle, &mount_id_parent, 0); + if (r_p < 0) + r_p = -errno; + + 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; + + /* got no handle; make no assumptions, return error */ + if (r_p < 0 && r < 0) + return r_p; + + /* got both handles; if they differ, it is a mount point */ + if (r_p >= 0 && r >= 0) + return mount_id_parent != mount_id; + + /* 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 == -EOPNOTSUPP || r == -ENOSYS || r == -EOPNOTSUPP) + return true; + + /* return error */ + if (r_p < 0) + return r_p; + return r; +} + static int dir_cleanup( + Item *i, const char *p, DIR *d, const struct stat *ds, @@ -222,29 +311,32 @@ 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; - char *sub_path = NULL; int r = 0; while ((dent = readdir(d))) { struct stat s; usec_t age; + _cleanup_free_ char *sub_path = NULL; 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) + continue; - if (errno != ENOENT) { - log_error("stat(%s/%s) failed: %m", p, dent->d_name); - r = -errno; - } - + /* FUSE, NFS mounts, SELinux might return EACCES */ + if (errno == EACCES) + log_debug_errno(errno, "stat(%s/%s) failed: %m", p, dent->d_name); + else + log_error_errno(errno, "stat(%s/%s) failed: %m", p, dent->d_name); + r = -errno; continue; } @@ -252,16 +344,19 @@ static int dir_cleanup( if (s.st_dev != rootdev) continue; + /* Try to detect bind mounts of the same filesystem instance; they + * do not differ in device major/minors. This type of query is not + * supported on all kernels or filesystem types though. */ + if (S_ISDIR(s.st_mode) && dir_is_mount_point(d, dent->d_name) > 0) + 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; + sub_path = strjoin(p, "/", dent->d_name, NULL); + if (!sub_path) { + r = log_oom(); goto finish; } @@ -282,22 +377,20 @@ static int dir_cleanup( if (maxdepth <= 0) log_warning("Reached max depth on %s.", sub_path); else { - DIR *sub_dir; + _cleanup_closedir_ DIR *sub_dir; int q; sub_dir = xopendirat(dirfd(d), dent->d_name, O_NOFOLLOW|O_NOATIME); - if (sub_dir == NULL) { + 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; } continue; } - q = dir_cleanup(sub_path, sub_dir, &s, cutoff, rootdev, false, maxdepth-1, false); - closedir(sub_dir); - + q = dir_cleanup(i, sub_path, sub_dir, &s, cutoff, rootdev, false, maxdepth-1, false); if (q < 0) r = q; } @@ -318,12 +411,14 @@ static int dir_cleanup( if (age >= cutoff) continue; - log_debug("rmdir '%s'\n", sub_path); + if (i->type != IGNORE_DIRECTORY_PATH || !streq(dent->d_name, p)) { + log_debug("rmdir '%s'", 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; + if (unlinkat(dirfd(d), dent->d_name, AT_REMOVEDIR) < 0) { + if (errno != ENOENT && errno != ENOTEMPTY) { + log_error_errno(errno, "rmdir(%s): %m", sub_path); + r = -errno; + } } } @@ -365,11 +460,11 @@ 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) { - log_error("unlink(%s): %m", sub_path); + log_error_errno(errno, "unlink(%s): %m", sub_path); r = -errno; } } @@ -385,319 +480,385 @@ 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); } - 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; +static int item_set_perms(Item *i, const char *path) { + struct stat st; + bool st_valid; assert(i); + assert(path); - if (i->type != CREATE_DIRECTORY && - i->type != TRUNCATE_DIRECTORY && - i->type != IGNORE_PATH) - return 0; + st_valid = stat(path, &st) == 0; - if (!i->age_set || i->age <= 0) - return 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 && 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 */ + } - n = now(CLOCK_REALTIME); - if (n < i->age) - return 0; + if (!st_valid || m != (st.st_mode & 07777)) { + if (chmod(path, m) < 0) + return log_error_errno(errno, "chmod(%s) failed: %m", path); + } + } - cutoff = n - i->age; + 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_INVALID, + i->gid_set ? i->gid : GID_INVALID) < 0) - d = opendir(i->path); - if (!d) { - if (errno == ENOENT) - return 0; + return log_error_errno(errno, "chown(%s) failed: %m", path); - log_error("Failed to open directory %s: %m", i->path); - return -errno; - } + return label_fix(path, false, false); +} - if (fstat(dirfd(d), &s) < 0) { - log_error("stat(%s) failed: %m", i->path); - r = -errno; - goto finish; - } +static int get_xattrs_from_arg(Item *i) { + char *xattr; + const char *p; + int r; - if (!S_ISDIR(s.st_mode)) { - log_error("%s is not a directory.", i->path); - r = -ENOTDIR; - goto finish; - } + assert(i); + assert(i->argument); - if (fstatat(dirfd(d), "..", &ps, AT_SYMLINK_NOFOLLOW) != 0) { - log_error("stat(%s/..) failed: %m", i->path); - r = -errno; - goto finish; - } + p = i->argument; - mountpoint = s.st_dev != ps.st_dev || - (s.st_dev == ps.st_dev && s.st_ino == ps.st_ino); + while ((r = unquote_first_word(&p, &xattr, false)) > 0) { + _cleanup_free_ char *tmp = NULL, *name = NULL, + *value = NULL, *value2 = NULL, *_xattr = xattr; + + r = split_pair(xattr, "=", &name, &value); + if (r < 0) { + log_warning("Illegal xattr found: \"%s\" - ignoring.", xattr); + continue; + } - r = dir_cleanup(i->path, d, &s, cutoff, s.st_dev, mountpoint, MAX_DEPTH, i->keep_first_level); + if (strempty(name) || strempty(value)) { + log_warning("Malformed xattr found: \"%s\" - ignoring.", xattr); + continue; + } -finish: - if (d) - closedir(d); + tmp = unquote(value, "\""); + if (!tmp) + return log_oom(); + + value2 = cunescape(tmp); + if (!value2) + return log_oom(); + + if (strv_push_pair(&i->xattrs, name, value2) < 0) + return log_oom(); + name = value2 = NULL; + } 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; - } +static int item_set_xattrs(Item *i, const char *path) { + char **name, **value; - 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) { + assert(i); + assert(path); + + STRV_FOREACH_PAIR(name, value, i->xattrs) { + int n; - log_error("chown(%s) failed: %m", path); + 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; +} - return label_fix(path, false, false); +static int get_acls_from_arg(Item *item) { +#ifdef HAVE_ACL + int r; + _cleanup_(acl_freep) acl_t a = NULL, d = NULL; + + assert(item); + + r = parse_acl(item->argument, &item->acl_access, &item->acl_default); + if (r < 0) + log_warning_errno(errno, "Failed to parse ACL \"%s\": %m. Ignoring", + item->argument); +#else + log_warning_errno(ENOSYS, "ACLs are not supported. Ignoring"); +#endif + + return 0; } -static int recursive_relabel_children(Item *i, const char *path) { - DIR *d; - int ret = 0; +static int item_set_acl(Item *item, const char *path) { +#ifdef HAVE_ACL + int r; - /* This returns the first error we run into, but nevertheless - * tries to go on */ + assert(item); + assert(path); - d = opendir(path); - if (!d) - return errno == ENOENT ? 0 : -errno; + if (item->acl_access) { + r = acl_set_file(path, ACL_TYPE_ACCESS, item->acl_access); + if (r < 0) { + _cleanup_(acl_free_charpp) char *t; - 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; + t = acl_to_any_text(item->acl_access, NULL, ',', TEXT_ABBREVIATE); + return log_error_errno(errno, + "Setting access ACL \"%s\" on %s failed: %m", + strna(t), path); } + } - if (!de) - break; - - if (streq(de->d_name, ".") || streq(de->d_name, "..")) - continue; + if (item->acl_default) { + r = acl_set_file(path, ACL_TYPE_DEFAULT, item->acl_default); + if (r < 0) { + _cleanup_(acl_free_charpp) char *t; - if (asprintf(&entry_path, "%s/%s", path, de->d_name) < 0) { - if (ret == 0) - ret = -ENOMEM; - continue; + t = acl_to_any_text(item->acl_default, NULL, ',', TEXT_ABBREVIATE); + return log_error_errno(errno, + "Setting default ACL \"%s\" on %s failed: %m", + strna(t), path); } + } +#endif - if (de->d_type == DT_UNKNOWN) { - struct stat st; + return 0; +} - if (lstat(entry_path, &st) < 0) { - if (ret == 0 && errno != ENOENT) - ret = -errno; - free(entry_path); - continue; - } +static int write_one_file(Item *i, const char *path) { + _cleanup_close_ int fd = -1; + int flags, r = 0; + struct stat st; - is_dir = S_ISDIR(st.st_mode); + assert(i); + assert(path); - } else - is_dir = de->d_type == DT_DIR; + flags = i->type == CREATE_FILE ? O_CREAT|O_APPEND|O_NOFOLLOW : + i->type == TRUNCATE_FILE ? O_CREAT|O_TRUNC|O_NOFOLLOW : 0; - r = item_set_perms(i, entry_path); - if (r < 0) { - if (ret == 0 && r != -ENOENT) - ret = r; - free(entry_path); - continue; - } + RUN_WITH_UMASK(0000) { + mac_selinux_create_file_prepare(path, S_IFREG); + fd = open(path, flags|O_NDELAY|O_CLOEXEC|O_WRONLY|O_NOCTTY, i->mode); + mac_selinux_create_file_clear(); + } - if (is_dir) { - r = recursive_relabel_children(i, entry_path); - if (r < 0 && ret == 0) - ret = r; - } + if (fd < 0) { + if (i->type == WRITE_FILE && errno == ENOENT) + return 0; - free(entry_path); + log_error_errno(errno, "Failed to create file %s: %m", path); + return -errno; } - closedir(d); + if (i->argument) { + _cleanup_free_ char *unescaped; + ssize_t n; + size_t l; - return ret; -} + unescaped = cunescape(i->argument); + if (!unescaped) + return log_oom(); -static int recursive_relabel(Item *i, const char *path) { - int r; - struct stat st; + l = strlen(unescaped); + n = write(fd, unescaped, l); + + if (n < 0 || (size_t) n < l) { + log_error("Failed to write file %s: %s", path, n < 0 ? strerror(-n) : "Short write"); + return n < 0 ? n : -EIO; + } + } + + fd = safe_close(fd); + + 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); + return -EEXIST; + } r = item_set_perms(i, path); if (r < 0) return r; - if (lstat(path, &st) < 0) - return -errno; + return 0; +} + +typedef int (*action_t)(Item *, const char *); - if (S_ISDIR(st.st_mode)) - r = recursive_relabel_children(i, path); +static int item_do_children(Item *i, const char *path, action_t action) { + _cleanup_closedir_ DIR *d; + int r = 0; + + assert(i); + assert(path); + + /* This returns the first error we run into, but nevertheless + * tries to go on */ + + d = opendir(path); + if (!d) + return errno == ENOENT || errno == ENOTDIR ? 0 : -errno; + + for (;;) { + _cleanup_free_ char *p = NULL; + struct dirent *de; + int q; + + errno = 0; + de = readdir(d); + if (!de) { + if (errno != 0 && r == 0) + r = -errno; + + break; + } + + if (streq(de->d_name, ".") || streq(de->d_name, "..")) + continue; + + p = strjoin(path, "/", de->d_name, NULL); + if (!p) + return -ENOMEM; + + q = action(i, p); + if (q < 0 && q != -ENOENT && r == 0) + r = q; + + if (IN_SET(de->d_type, DT_UNKNOWN, DT_DIR)) { + q = item_do_children(i, p, action); + if (q < 0 && r == 0) + r = q; + } + } return r; } -static int glob_item(Item *i, int (*action)(Item *, const char *)) { +static int glob_item(Item *i, action_t action, bool recursive) { + _cleanup_globfree_ glob_t g = {}; 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) { + k = glob(i->path, GLOB_NOSORT|GLOB_BRACE, NULL, &g); + if (k != 0 && k != GLOB_NOMATCH) + return log_error_errno(errno ?: EIO, "glob(%s) failed: %m", i->path); - if (k != GLOB_NOMATCH) { - if (errno != 0) - errno = EIO; + STRV_FOREACH(fn, g.gl_pathv) { + k = action(i, *fn); + if (k < 0 && r == 0) + r = k; - log_error("glob(%s) failed: %m", i->path); - return -errno; + if (recursive) { + k = item_do_children(i, *fn, action); + if (k < 0 && r == 0) + r = k; } } - 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, e; - mode_t u; struct stat st; + int r = 0; assert(i); switch (i->type) { case IGNORE_PATH: + case IGNORE_DIRECTORY_PATH: case REMOVE_PATH: case RECURSIVE_REMOVE_PATH: return 0; case CREATE_FILE: case TRUNCATE_FILE: - case WRITE_FILE: { - int fd, flags; - - flags = i->type == CREATE_FILE ? O_CREAT|O_APPEND : - i->type == TRUNCATE_FILE ? O_CREAT|O_TRUNC : 0; - - u = umask(0); - label_context_set(i->path, S_IFREG); - fd = open(i->path, flags|O_NDELAY|O_CLOEXEC|O_WRONLY|O_NOCTTY|O_NOFOLLOW, i->mode); - e = errno; - label_context_clear(); - umask(u); - errno = e; - - if (fd < 0) { - if (i->type == WRITE_FILE && errno == ENOENT) - break; - - log_error("Failed to create file %s: %m", i->path); - return -errno; - } - - if (i->argument) { - ssize_t n; - size_t l; - struct iovec iovec[2]; - static const char new_line = '\n'; + r = write_one_file(i, i->path); + if (r < 0) + return r; + break; - l = strlen(i->argument); + case COPY_FILES: + r = copy_tree(i->argument, i->path, false); + if (r < 0) { + struct stat a, b; - zero(iovec); - iovec[0].iov_base = i->argument; - iovec[0].iov_len = l; + if (r != -EEXIST) + return log_error_errno(r, "Failed to copy files to %s: %m", i->path); - iovec[1].iov_base = (void*) &new_line; - iovec[1].iov_len = 1; + if (stat(i->argument, &a) < 0) + return log_error_errno(errno, "stat(%s) failed: %m", i->argument); - n = writev(fd, iovec, 2); + if (stat(i->path, &b) < 0) + return log_error_errno(errno, "stat(%s) failed: %m", i->path); - /* It's OK if we don't write the trailing - * newline, hence we check for l, instead of - * l+1 here. Files in /sys often refuse - * writing of the trailing newline. */ - if (n < 0 || (size_t) n < l) { - log_error("Failed to write file %s: %s", i->path, n < 0 ? strerror(-n) : "Short write"); - close_nointr_nofail(fd); - return n < 0 ? n : -EIO; + 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); + return 0; } } - close_nointr_nofail(fd); - - if (stat(i->path, &st) < 0) { - log_error("stat(%s) failed: %m", i->path); - return -errno; - } + r = item_set_perms(i, i->path); + if (r < 0) + return r; - if (!S_ISREG(st.st_mode)) { - log_error("%s is not a file.", i->path); - return -EEXIST; - } + break; - r = item_set_perms(i, i->path); + case WRITE_FILE: + r = glob_item(i, write_one_file, false); if (r < 0) return r; break; - } - case TRUNCATE_DIRECTORY: case CREATE_DIRECTORY: + case TRUNCATE_DIRECTORY: + case CREATE_SUBVOLUME: - u = umask(0); - mkdir_parents_label(i->path, 0755); - r = mkdir(i->path, i->mode); - umask(u); + RUN_WITH_UMASK(0000) + mkdir_parents_label(i->path, 0755); - if (r < 0 && errno != EEXIST) { - log_error("Failed to create directory %s: %m", i->path); - return -errno; - } + if (i->type == CREATE_SUBVOLUME) { + RUN_WITH_UMASK((~i->mode) & 0777) + r = btrfs_subvol_make(i->path); + } else + r = 0; - if (stat(i->path, &st) < 0) { - log_error("stat(%s) failed: %m", i->path); - return -errno; + if (IN_SET(i->type, CREATE_DIRECTORY, TRUNCATE_DIRECTORY) || r == -ENOTTY) { + RUN_WITH_UMASK(0000) + r = mkdir_label(i->path, i->mode); } - if (!S_ISDIR(st.st_mode)) { - log_error("%s is not a directory.", i->path); - return -EEXIST; + if (r < 0) { + if (r != -EEXIST) + return log_error_errno(r, "Failed to create directory or subvolume %s: %m", i->path); + + 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); + return 0; + } } r = item_set_perms(i, i->path); @@ -708,23 +869,36 @@ static int create_item(Item *i) { 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; + RUN_WITH_UMASK(0000) { + mac_selinux_create_file_prepare(i->path, S_IFIFO); + r = mkfifo(i->path, i->mode); + mac_selinux_create_file_clear(); } - if (stat(i->path, &st) < 0) { - log_error("stat(%s) failed: %m", i->path); - return -errno; - } + if (r < 0) { + if (errno != EEXIST) + return log_error_errno(errno, "Failed to create fifo %s: %m", i->path); + + 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) { - if (!S_ISFIFO(st.st_mode)) { - log_error("%s is not a fifo.", i->path); - return -EEXIST; + RUN_WITH_UMASK(0000) { + mac_selinux_create_file_prepare(i->path, S_IFIFO); + r = mkfifo_atomic(i->path, i->mode); + mac_selinux_create_file_clear(); + } + + 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; + } + } } r = item_set_perms(i, i->path); @@ -733,61 +907,89 @@ static int create_item(Item *i) { break; - case CREATE_SYMLINK: { - char *x; + 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); - e = errno; - label_context_clear(); - errno = e; - - if (r < 0 && errno != EEXIST) { - log_error("symlink(%s, %s) failed: %m", i->argument, i->path); - return -errno; - } + mac_selinux_create_file_clear(); - r = readlink_malloc(i->path, &x); if (r < 0) { - log_error("readlink(%s) failed: %s", i->path, strerror(-r)); - return -errno; - } + _cleanup_free_ char *x = NULL; + + 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 (!streq(i->argument, x)) { - free(x); - log_error("%s is not the right symlinks.", i->path); - return -EEXIST; + if (i->force) { + mac_selinux_create_file_prepare(i->path, S_IFLNK); + r = symlink_atomic(i->argument, i->path); + mac_selinux_create_file_clear(); + + 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; + } + } } - free(x); break; - } case CREATE_BLOCK_DEVICE: case CREATE_CHAR_DEVICE: { - mode_t file_type = (i->type == CREATE_BLOCK_DEVICE ? S_IFBLK : S_IFCHR); - - u = umask(0); - label_context_set(i->path, file_type); - r = mknod(i->path, i->mode | file_type, i->major_minor); - e = errno; - label_context_clear(); - umask(u); - errno = e; - - if (r < 0 && errno != EEXIST) { - log_error("Failed to create device node %s: %m", i->path); - return -errno; + mode_t file_type; + + if (have_effective_cap(CAP_MKNOD) == 0) { + /* In a container we lack CAP_MKNOD. We + shouldn't attempt to create the device node in + that case to avoid noise, and we don't support + virtualized devices in containers anyway. */ + + log_debug("We lack CAP_MKNOD, skipping creation of device node %s.", i->path); + return 0; } - if (stat(i->path, &st) < 0) { - log_error("stat(%s) failed: %m", i->path); - return -errno; + file_type = i->type == CREATE_BLOCK_DEVICE ? S_IFBLK : S_IFCHR; + + RUN_WITH_UMASK(0000) { + mac_selinux_create_file_prepare(i->path, file_type); + r = mknod(i->path, i->mode | file_type, i->major_minor); + mac_selinux_create_file_clear(); } - if ((st.st_mode & S_IFMT) != file_type) { - log_error("%s is not a device node.", i->path); - return -EEXIST; + if (r < 0) { + if (errno == EPERM) { + log_debug("We lack permissions, possibly because of cgroup configuration; " + "skipping creation of device node %s.", i->path); + return 0; + } + + if (errno != EEXIST) + return log_error_errno(errno, "Failed to create device node %s: %m", i->path); + + 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) { + mac_selinux_create_file_prepare(i->path, file_type); + r = mknod_atomic(i->path, i->mode | file_type, i->major_minor); + mac_selinux_create_file_clear(); + } + + 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; + } + } } r = item_set_perms(i, i->path); @@ -797,16 +999,29 @@ static int create_item(Item *i) { break; } + case ADJUST_MODE: case RELABEL_PATH: - r = glob_item(i, item_set_perms); + r = glob_item(i, item_set_perms, false); if (r < 0) - return 0; + return r; break; case RECURSIVE_RELABEL_PATH: - r = glob_item(i, recursive_relabel); + r = glob_item(i, item_set_perms, true); + if (r < 0) + return r; + break; + + case SET_XATTR: + r = item_set_xattrs(i, i->path); + if (r < 0) + return r; + break; + + case SET_ACL: + r = item_set_acl(i, i->path); if (r < 0) return r; } @@ -826,21 +1041,25 @@ 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: case CREATE_CHAR_DEVICE: case IGNORE_PATH: + case IGNORE_DIRECTORY_PATH: + case ADJUST_MODE: case RELABEL_PATH: case RECURSIVE_RELABEL_PATH: case WRITE_FILE: + case COPY_FILES: + case SET_XATTR: + case SET_ACL: 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, "rm(%s): %m", instance); break; @@ -849,10 +1068,8 @@ 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; } @@ -870,333 +1087,533 @@ 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: case CREATE_BLOCK_DEVICE: case IGNORE_PATH: + case IGNORE_DIRECTORY_PATH: + case ADJUST_MODE: case RELABEL_PATH: case RECURSIVE_RELABEL_PATH: case WRITE_FILE: + case COPY_FILES: + case SET_XATTR: + case SET_ACL: break; case REMOVE_PATH: case TRUNCATE_DIRECTORY: case RECURSIVE_REMOVE_PATH: - r = glob_item(i, remove_item_instance); + r = glob_item(i, remove_item_instance, false); break; } return r; } +static int clean_item_instance(Item *i, const char* instance) { + _cleanup_closedir_ DIR *d = NULL; + struct stat s, ps; + bool mountpoint; + int r; + usec_t cutoff, n; + + assert(i); + + if (!i->age_set) + return 0; + + n = now(CLOCK_REALTIME); + if (n < i->age) + return 0; + + cutoff = n - i->age; + + d = opendir(instance); + if (!d) { + if (errno == ENOENT || errno == ENOTDIR) + return 0; + + log_error_errno(errno, "Failed to open directory %s: %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) + 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); + + r = dir_cleanup(i, instance, d, &s, cutoff, s.st_dev, mountpoint, + MAX_DEPTH, i->keep_first_level); + return r; +} + +static int clean_item(Item *i) { + int r = 0; + + assert(i); + + switch (i->type) { + case CREATE_DIRECTORY: + case CREATE_SUBVOLUME: + case TRUNCATE_DIRECTORY: + case IGNORE_PATH: + case COPY_FILES: + clean_item_instance(i, i->path); + break; + case IGNORE_DIRECTORY_PATH: + r = glob_item(i, clean_item_instance, false); + break; + default: + break; + } + + return r; +} + +static int process_item_array(ItemArray *array); + static int process_item(Item *i) { - int r, q, p; + int r, q, p, t = 0; + _cleanup_free_ char *prefix = NULL; assert(i); + if (i->done) + return 0; + + i->done = true; + + prefix = malloc(strlen(i->path) + 1); + if (!prefix) + return log_oom(); + + PATH_FOREACH_PREFIX(prefix, i->path) { + ItemArray *j; + + j = hashmap_get(items, prefix); + if (j) { + int s; + + s = process_item_array(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; + return t < 0 ? t : + r < 0 ? r : + q < 0 ? q : + p; +} + +static int process_item_array(ItemArray *array) { + unsigned n; + int r = 0, k; + + assert(array); - if (q < 0) - return q; + for (n = 0; n < array->count; n++) { + k = process_item(array->items + n); + if (k < 0 && r == 0) + r = k; + } - return p; + return r; } -static void item_free(Item *i) { +static void item_free_contents(Item *i) { assert(i); - free(i->path); free(i->argument); - free(i); + strv_free(i->xattrs); + +#ifdef HAVE_ACL + acl_free(i->acl_access); + acl_free(i->acl_default); +#endif +} + +static void item_array_free(ItemArray *a) { + unsigned n; + + if (!a) + return; + + for (n = 0; n < a->count; n++) + item_free_contents(a->items + n); + free(a->items); + free(a); } -static bool item_equal(Item *a, Item *b) { +static bool item_compatible(Item *a, Item *b) { assert(a); assert(b); + assert(streq(a->path, b->path)); - if (!streq_ptr(a->path, b->path)) - return false; + if (takes_ownership(a->type) && takes_ownership(b->type)) + /* check if the items are the same */ + return streq_ptr(a->argument, b->argument) && - if (a->type != b->type) - return false; + a->uid_set == b->uid_set && + a->uid == b->uid && - if (a->uid_set != b->uid_set || - (a->uid_set && a->uid != b->uid)) - return false; + a->gid_set == b->gid_set && + a->gid == b->gid && - if (a->gid_set != b->gid_set || - (a->gid_set && a->gid != b->gid)) - return false; + a->mode_set == b->mode_set && + a->mode == b->mode && - if (a->mode_set != b->mode_set || - (a->mode_set && a->mode != b->mode)) - return false; + a->age_set == b->age_set && + a->age == b->age && - if (a->age_set != b->age_set || - (a->age_set && a->age != b->age)) - return false; + a->mask_perms == b->mask_perms && - if ((a->type == CREATE_FILE || - a->type == TRUNCATE_FILE || - a->type == WRITE_FILE || - a->type == CREATE_SYMLINK) && - !streq_ptr(a->argument, b->argument)) - return false; + a->keep_first_level == b->keep_first_level && - if ((a->type == CREATE_CHAR_DEVICE || - a->type == CREATE_BLOCK_DEVICE) && - a->major_minor != b->major_minor) - return false; + a->major_minor == b->major_minor; return true; } +static bool should_include_path(const char *path) { + char **prefix; + + STRV_FOREACH(prefix, arg_exclude_prefixes) + if (path_startswith(path, *prefix)) + return false; + + STRV_FOREACH(prefix, arg_include_prefixes) + if (path_startswith(path, *prefix)) + return true; + + /* no matches, so we should include this path only if we + * have no whitelist at all */ + return strv_length(arg_include_prefixes) == 0; +} + 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; + + 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_free_ char *action = NULL, *mode = NULL, *user = NULL, *group = NULL, *age = NULL, *path = NULL; + _cleanup_(item_free_contents) Item i = {}; + ItemArray *existing; Hashmap *h; - int r, n = -1; + int r, c = -1, pos; + bool force = false, boot = false; 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 " - "%n", - &type, - &i->path, + r = sscanf(buffer, + "%ms %ms %ms %ms %ms %ms %n", + &action, + &path, &mode, &user, &group, &age, - &n) < 2) { + &c); + if (r < 2) { log_error("[%s:%u] Syntax error.", fname, line); - r = -EIO; - goto finish; + return -EIO; } - if (n >= 0) { - n += strspn(buffer+n, WHITESPACE); - if (buffer[n] != 0 && (buffer[n] != '-' || buffer[n+1] != 0)) { - i->argument = unquote(buffer+n, "\""); - if (!i->argument) { - log_error("Out of memory"); - return -ENOMEM; - } + if (isempty(action)) { + log_error("[%s:%u] Command too short '%s'.", fname, line, action); + return -EINVAL; + } + + for (pos = 1; action[pos]; pos++) { + if (action[pos] == '!' && !boot) + boot = true; + else if (action[pos] == '+' && !force) + force = true; + else { + log_error("[%s:%u] Unknown modifiers in command '%s'", + fname, line, action); + return -EINVAL; + } + } + + if (boot && !arg_boot) + return 0; + + i.type = action[0]; + i.force = force; + + 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 (c >= 0) { + c += strspn(buffer+c, WHITESPACE); + if (buffer[c] != 0 && (buffer[c] != '-' || buffer[c+1] != 0)) { + i.argument = unquote(buffer+c, "\""); + if (!i.argument) + return log_oom(); } } - switch(type) { + switch (i.type) { case CREATE_FILE: case TRUNCATE_FILE: case CREATE_DIRECTORY: + case CREATE_SUBVOLUME: case TRUNCATE_DIRECTORY: case CREATE_FIFO: case IGNORE_PATH: + case IGNORE_DIRECTORY_PATH: case REMOVE_PATH: case RECURSIVE_REMOVE_PATH: + case ADJUST_MODE: 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; + if (!i.argument) { + i.argument = strappend("/usr/share/factory/", i.path); + if (!i.argument) + return log_oom(); } break; case WRITE_FILE: - if (!i->argument) { + if (!i.argument) { log_error("[%s:%u] Write file requires argument.", fname, line); - r = -EBADMSG; - goto finish; + return -EBADMSG; } break; + case COPY_FILES: + if (!i.argument) { + i.argument = strappend("/usr/share/factory/", i.path); + if (!i.argument) + return log_oom(); + } else if (!path_is_absolute(i.argument)) { + log_error("[%s:%u] Source path is not absolute.", fname, line); + return -EBADMSG; + } + + path_kill_slashes(i.argument); + break; + case CREATE_CHAR_DEVICE: case CREATE_BLOCK_DEVICE: { unsigned major, minor; - if (!i->argument) { + if (!i.argument) { log_error("[%s:%u] Device file requires argument.", fname, line); - r = -EBADMSG; - goto finish; + return -EBADMSG; } - 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 (sscanf(i.argument, "%u:%u", &major, &minor) != 2) { + log_error("[%s:%u] Can't parse device file major/minor '%s'.", fname, line, i.argument); + return -EBADMSG; } - i->major_minor = makedev(major, minor); + i.major_minor = makedev(major, minor); 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; + + case SET_ACL: + if (!i.argument) { + log_error("[%s:%u] Set ACLs requires argument.", fname, line); + return -EBADMSG; + } + r = get_acls_from_arg(&i); + if (r < 0) + return r; + break; + default: - log_error("[%s:%u] Unknown file type '%c'.", fname, line, type); - r = -EBADMSG; - goto finish; + log_error("[%s:%u] Unknown command type '%c'.", fname, line, i.type); + return -EBADMSG; } - 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; + if (!path_is_absolute(i.path)) { + log_error("[%s:%u] Path '%s' not absolute.", fname, line, i.path); + return -EBADMSG; } - path_kill_slashes(i->path); + path_kill_slashes(i.path); - if (arg_prefix && !path_startswith(i->path, arg_prefix)) { - r = 0; - goto finish; + if (!should_include_path(i.path)) + return 0; + + if (arg_root) { + char *p; + + 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; - r = get_user_creds(&u, &i->uid, NULL, NULL, NULL); + r = get_user_creds(&u, &i.uid, NULL, NULL, NULL); if (r < 0) { log_error("[%s:%u] Unknown user '%s'.", fname, line, user); - goto finish; + return r; } - i->uid_set = true; + i.uid_set = true; } if (group && !streq(group, "-")) { const char *g = group; - r = get_group_creds(&g, &i->gid); + r = get_group_creds(&g, &i.gid); if (r < 0) { log_error("[%s:%u] Unknown group '%s'.", fname, line, group); - goto finish; + return r; } - i->gid_set = true; + i.gid_set = true; } if (mode && !streq(mode, "-")) { + const char *mm = mode; unsigned m; - if (sscanf(mode, "%o", &m) != 1) { + if (*mm == '~') { + i.mask_perms = true; + mm++; + } + + if (sscanf(mm, "%o", &m) != 1) { log_error("[%s:%u] Invalid mode '%s'.", fname, line, mode); - r = -ENOENT; - goto finish; + return -ENOENT; } - i->mode = m; - i->mode_set = true; + i.mode = m; + i.mode_set = true; } else - i->mode = - i->type == CREATE_DIRECTORY || - i->type == TRUNCATE_DIRECTORY ? 0755 : 0644; + i.mode = IN_SET(i.type, CREATE_DIRECTORY, CREATE_SUBVOLUME, TRUNCATE_DIRECTORY) + ? 0755 : 0644; if (age && !streq(age, "-")) { const char *a = age; if (*a == '~') { - i->keep_first_level = true; + i.keep_first_level = true; a++; } - if (parse_usec(a, &i->age) < 0) { + if (parse_sec(a, &i.age) < 0) { log_error("[%s:%u] Invalid age '%s'.", fname, line, age); - r = -EBADMSG; - goto finish; + return -EBADMSG; } - i->age_set = true; + i.age_set = true; } - h = needs_glob(i->type) ? globs : items; + h = needs_glob(i.type) ? globs : items; - existing = hashmap_get(h, i->path); + existing = hashmap_get(h, i.path); if (existing) { + unsigned n; - /* 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; + for (n = 0; n < existing->count; n++) { + if (!item_compatible(existing->items + n, &i)) + log_warning("[%s:%u] Duplicate line for path \"%s\", ignoring.", + fname, line, i.path); + } + } else { + existing = new0(ItemArray, 1); + r = hashmap_put(h, i.path, existing); + if (r < 0) + return log_oom(); } - i = NULL; - r = 0; + if (!GREEDY_REALLOC(existing->items, existing->size, existing->count + 1)) + return log_oom(); -finish: - free(user); - free(group); - free(mode); - free(age); - - if (i) - item_free(i); - - return r; + memcpy(existing->items + existing->count++, &i, sizeof(i)); + zero(i); + 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" - " --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", + " -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" + " --root=PATH Operate on an alternate filesystem root\n", program_invocation_short_name); - - return 0; } static int parse_argv(int argc, char *argv[]) { enum { + ARG_VERSION = 0x100, ARG_CREATE, ARG_CLEAN, ARG_REMOVE, - ARG_PREFIX + ARG_BOOT, + ARG_PREFIX, + ARG_EXCLUDE_PREFIX, + ARG_ROOT, }; 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 } + { "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 }, + { "root", required_argument, NULL, ARG_ROOT }, + {} }; int c; @@ -1204,7 +1621,7 @@ 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) { @@ -1212,6 +1629,11 @@ static int parse_argv(int argc, char *argv[]) { help(); return 0; + case ARG_VERSION: + puts(PACKAGE_STRING); + puts(SYSTEMD_FEATURES); + return 0; + case ARG_CREATE: arg_create = true; break; @@ -1224,18 +1646,35 @@ static int parse_argv(int argc, char *argv[]) { arg_remove = true; break; + case ARG_BOOT: + arg_boot = true; + break; + case ARG_PREFIX: - arg_prefix = optarg; + if (strv_push(&arg_include_prefixes, optarg) < 0) + return log_oom(); + break; + + case ARG_EXCLUDE_PREFIX: + if (strv_push(&arg_exclude_prefixes, optarg) < 0) + return log_oom(); + break; + + case ARG_ROOT: + free(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"); } - } if (!arg_clean && !arg_create && !arg_remove) { log_error("You need to specify at least one of --clean, --create or --remove."); @@ -1246,84 +1685,83 @@ static int parse_argv(int argc, char *argv[]) { } static int read_config_file(const char *fn, bool ignore_enoent) { - FILE *f; + _cleanup_fclose_ FILE *f = NULL; + char line[LINE_MAX]; + Iterator iterator; unsigned v = 0; - int r = 0; + Item *i; + int r; assert(fn); - f = fopen(fn, "re"); - if (!f) { - - if (ignore_enoent && errno == ENOENT) + r = search_and_fopen_nulstr(fn, "re", arg_root, conf_file_dirs, &f); + if (r < 0) { + if (ignore_enoent && r == -ENOENT) return 0; - log_error("Failed to open %s: %m", fn); - return -errno; + return log_error_errno(r, "Failed to open '%s', ignoring: %m", fn); } - 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; - } - - if (ferror(f)) { - log_error("Failed to read from file %s: %m", fn); - if (r == 0) - r = -EIO; + k = parse_line(fn, v, l); + if (k < 0 && r == 0) + r = k; } - fclose(f); + /* we have to determine age parameter for each entry of type X */ + HASHMAP_FOREACH(i, globs, iterator) { + Iterator iter; + Item *j, *candidate_item = NULL; - return r; -} + if (i->type != IGNORE_DIRECTORY_PATH) + continue; -static char *resolve_fragment(const char *fragment, const char **search_paths) { - const char **p; - char *resolved_path; + HASHMAP_FOREACH(j, items, iter) { + if (j->type != CREATE_DIRECTORY && j->type != TRUNCATE_DIRECTORY && j->type != CREATE_SUBVOLUME) + continue; - if (is_path(fragment)) - return strdup(fragment); + if (path_equal(j->path, i->path)) { + candidate_item = j; + break; + } - STRV_FOREACH(p, search_paths) { - resolved_path = strjoin(*p, "/", fragment, NULL); - if (resolved_path == NULL) { - log_error("Out of memory"); - return NULL; + if ((!candidate_item && path_startswith(i->path, j->path)) || + (candidate_item && path_startswith(j->path, candidate_item->path) && (fnmatch(i->path, j->path, FNM_PATHNAME | FNM_PERIOD) == 0))) + candidate_item = j; } - if (access(resolved_path, F_OK) == 0) - return resolved_path; + if (candidate_item && candidate_item->age_set) { + i->age = candidate_item->age; + i->age_set = true; + } + } - free(resolved_path); + if (ferror(f)) { + log_error_errno(errno, "Failed to read from file %s: %m", fn); + if (r == 0) + r = -EIO; } - errno = ENOENT; - return NULL; + return r; } int main(int argc, char *argv[]) { - int r; - Item *i; + int r, k; + ItemArray *a; Iterator iterator; r = parse_argv(argc, argv); if (r <= 0) - return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; + goto finish; log_set_target(LOG_TARGET_AUTO); log_parse_environment(); @@ -1331,74 +1769,73 @@ 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) { - log_error("Out of memory"); - r = EXIT_FAILURE; + r = log_oom(); goto finish; } - r = EXIT_SUCCESS; + r = 0; if (optind < argc) { int j; for (j = optind; j < argc; j++) { - char *fragment; - - fragment = resolve_fragment(argv[j], (const char**) conf_file_dirs); - if (!fragment) { - log_error("Failed to find a %s file: %m", argv[j]); - r = EXIT_FAILURE; - goto finish; - } - if (read_config_file(fragment, false) < 0) - r = EXIT_FAILURE; - free(fragment); + k = read_config_file(argv[j], false); + if (k < 0 && r == 0) + r = k; } } else { - char **files, **f; + _cleanup_strv_free_ char **files = NULL; + char **f; - r = conf_files_list_strv(&files, ".conf", - (const char **) 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)); - r = EXIT_FAILURE; + log_error_errno(r, "Failed to enumerate tmpfiles.d files: %m"); goto finish; } STRV_FOREACH(f, files) { - if (read_config_file(*f, true) < 0) - r = EXIT_FAILURE; + k = read_config_file(*f, true); + if (k < 0 && r == 0) + r = k; } - - strv_free(files); } - HASHMAP_FOREACH(i, globs, iterator) - process_item(i); + HASHMAP_FOREACH(a, globs, iterator) { + k = process_item_array(a); + if (k < 0 && r == 0) + r = k; + } - HASHMAP_FOREACH(i, items, iterator) - process_item(i); + HASHMAP_FOREACH(a, items, iterator) { + k = process_item_array(a); + if (k < 0 && r == 0) + r = k; + } finish: - while ((i = hashmap_steal_first(items))) - item_free(i); + while ((a = hashmap_steal_first(items))) + item_array_free(a); - while ((i = hashmap_steal_first(globs))) - item_free(i); + while ((a = hashmap_steal_first(globs))) + item_array_free(a); hashmap_free(items); hashmap_free(globs); + free(arg_include_prefixes); + free(arg_exclude_prefixes); + free(arg_root); + set_free_free(unix_sockets); - label_finish(); + mac_selinux_finish(); - return r; + return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; }