#include <dirent.h>

#include <errno.h>

#include <fcntl.h>

#include <fnmatch.h>

#include <getopt.h>

#include <glob.h>

#include <limits.h>

#include <linux/fs.h>

#include <stdbool.h>

#include <stddef.h>

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <sys/stat.h>

#include <sys/xattr.h>

#include <time.h>

#include <unistd.h>

#include "acl-util.h"

#include "btrfs-util.h"

#include "capability.h"

#include "conf-files.h"

#include "copy.h"

#include "escape.h"

#include "fd-util.h"

#include "formats-util.h"

#include "io-util.h"

#include "label.h"

#include "log.h"

#include "macro.h"

#include "missing.h"

#include "mkdir.h"

#include "path-util.h"

#include "rm-rf.h"

#include "selinux-util.h"

#include "set.h"

#include "specifier.h"

#include "string-util.h"

#include "strv.h"

#include "user-util.h"

#include "util.h"

typedef enum ItemType {

/* These ones take file names */

CREATE_FILE = 'f',

TRUNCATE_FILE = 'F',

CREATE_DIRECTORY = 'd',

TRUNCATE_DIRECTORY = 'D',

CREATE_SUBVOLUME = 'v',

CREATE_SUBVOLUME_INHERIT_QUOTA = 'q',

CREATE_SUBVOLUME_NEW_QUOTA = 'Q',

CREATE_FIFO = 'p',

CREATE_SYMLINK = 'L',

CREATE_CHAR_DEVICE = 'c',

CREATE_BLOCK_DEVICE = 'b',

COPY_FILES = 'C',

/* These ones take globs */

WRITE_FILE = 'w',

SET_XATTR = 't',

RECURSIVE_SET_XATTR = 'T',

SET_ACL = 'a',

RECURSIVE_SET_ACL = 'A',

SET_ATTRIBUTE = 'h',

RECURSIVE_SET_ATTRIBUTE = 'H',

IGNORE_PATH = 'x',

IGNORE_DIRECTORY_PATH = 'X',

REMOVE_PATH = 'r',

RECURSIVE_REMOVE_PATH = 'R',

RELABEL_PATH = 'z',

RECURSIVE_RELABEL_PATH = 'Z',

ADJUST_MODE = 'm', /* legacy, 'z' is identical to this */

} ItemType;

typedef struct Item {

ItemType type;

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;

usec_t age;

dev_t major_minor;

unsigned attribute_value;

unsigned attribute_mask;

bool uid_set:1;

bool gid_set:1;

bool mode_set:1;

bool age_set:1;

bool mask_perms:1;

bool attribute_set:1;

bool keep_first_level:1;

bool force:1;

bool done:1;

} Item;

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 char **arg_include_prefixes = NULL;

static char **arg_exclude_prefixes = NULL;

static char *arg_root = NULL;

static const char conf_file_dirs[] = CONF_DIRS_NULSTR("tmpfiles");

#define MAX_DEPTH 256

static OrderedHashmap *items = NULL, *globs = NULL;

static Set *unix_sockets = NULL;

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 },

{}

};

static bool needs_glob(ItemType t) {

return IN_SET(t,

WRITE_FILE,

IGNORE_PATH,

IGNORE_DIRECTORY_PATH,

REMOVE_PATH,

RECURSIVE_REMOVE_PATH,

ADJUST_MODE,

RELABEL_PATH,

RECURSIVE_RELABEL_PATH,

SET_XATTR,

RECURSIVE_SET_XATTR,

SET_ACL,

RECURSIVE_SET_ACL,

SET_ATTRIBUTE,

RECURSIVE_SET_ATTRIBUTE);

}

static bool takes_ownership(ItemType t) {

return IN_SET(t,

CREATE_FILE,

TRUNCATE_FILE,

CREATE_DIRECTORY,

TRUNCATE_DIRECTORY,

CREATE_SUBVOLUME,

CREATE_SUBVOLUME_INHERIT_QUOTA,

CREATE_SUBVOLUME_NEW_QUOTA,

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(OrderedHashmap *h, const char *match) {

ItemArray *j;

Iterator i;

ORDERED_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) {

_cleanup_fclose_ FILE *f = NULL;

char line[LINE_MAX];

if (unix_sockets)

return;

/* We maintain a cache of the sockets we found in

unix_sockets = set_new(&string_hash_ops);

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_consume(unix_sockets, s);

if (k < 0 && k != -EEXIST)

goto fail;

}

return;

fail:

set_free_free(unix_sockets);

unix_sockets = NULL;

}

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_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

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 DIR* xopendirat_nomod(int dirfd, const char *path) {

DIR *dir;

dir = xopendirat(dirfd, path, O_NOFOLLOW|O_NOATIME);

if (dir)

return dir;

log_debug_errno(errno, "Cannot open %sdirectory \"%s\": %m", dirfd == AT_FDCWD ? "" : "sub", path);

if (errno != EPERM)

return NULL;

dir = xopendirat(dirfd, path, O_NOFOLLOW);

if (!dir)

log_debug_errno(errno, "Cannot open %sdirectory \"%s\": %m", dirfd == AT_FDCWD ? "" : "sub", path);

return dir;

}

static DIR* opendir_nomod(const char *path) {

return xopendirat_nomod(AT_FDCWD, path);

}

static int dir_cleanup(

Item *i,

const char *p,

DIR *d,

const struct stat *ds,

usec_t cutoff,

dev_t rootdev,

bool mountpoint,

int maxdepth,

bool keep_this_level) {

struct dirent *dent;

struct timespec times[2];

bool deleted = false;

int r = 0;

while ((dent = readdir(d))) {

struct stat s;

usec_t age;

_cleanup_free_ char *sub_path = NULL;

if (STR_IN_SET(dent->d_name, ".", ".."))

continue;

if (fstatat(dirfd(d), dent->d_name, &s, AT_SYMLINK_NOFOLLOW) < 0) {

if (errno == ENOENT)

continue;

/* 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;

}

/* Stay on the same filesystem */

if (s.st_dev != rootdev) {

log_debug("Ignoring \"%s/%s\": different filesystem.", p, dent->d_name);

continue;

}

/* Try to detect bind mounts of the same filesystem instance; they

if (S_ISDIR(s.st_mode) && dir_is_mount_point(d, dent->d_name) > 0) {

log_debug("Ignoring \"%s/%s\": different mount of the same filesystem.",

p, dent->d_name);

continue;

}

/* Do not delete read-only files owned by root */

if (s.st_uid == 0 && !(s.st_mode & S_IWUSR)) {

log_debug("Ignoring \"%s/%s\": read-only and owner by root.", p, dent->d_name);

continue;

}

sub_path = strjoin(p, "/", dent->d_name, NULL);

if (!sub_path) {

r = log_oom();

goto finish;

}

/* Is there an item configured for this path? */

if (ordered_hashmap_get(items, sub_path)) {

log_debug("Ignoring \"%s\": a separate entry exists.", sub_path);

continue;

}

if (find_glob(globs, sub_path)) {

log_debug("Ignoring \"%s\": a separate glob exists.", sub_path);

continue;

}

if (S_ISDIR(s.st_mode)) {

if (mountpoint &&

streq(dent->d_name, "lost+found") &&

s.st_uid == 0) {

log_debug("Ignoring \"%s\".", sub_path);

continue;

}

if (maxdepth <= 0)

log_warning("Reached max depth on \"%s\".", sub_path);

else {

_cleanup_closedir_ DIR *sub_dir;

int q;

sub_dir = xopendirat_nomod(dirfd(d), dent->d_name);

if (!sub_dir) {

if (errno != ENOENT)

r = log_error_errno(errno, "opendir(%s) failed: %m", sub_path);

continue;

}

q = dir_cleanup(i, sub_path, sub_dir, &s, cutoff, rootdev, false, maxdepth-1, false);

if (q < 0)

r = q;

}

/* Note: if you are wondering why we don't

if (keep_this_level) {

log_debug("Keeping \"%s\".", sub_path);

continue;

}

/* Ignore ctime, we change it when deleting */

age = timespec_load(&s.st_mtim);

if (age >= cutoff) {

char a[FORMAT_TIMESTAMP_MAX];

/* Follows spelling in stat(1). */

log_debug("Directory \"%s\": modify time %s is too new.",

sub_path,

format_timestamp_us(a, sizeof(a), age));

continue;

}

age = timespec_load(&s.st_atim);

if (age >= cutoff) {

char a[FORMAT_TIMESTAMP_MAX];

log_debug("Directory \"%s\": access time %s is too new.",

sub_path,

format_timestamp_us(a, sizeof(a), age));

continue;

}

log_debug("Removing directory \"%s\".", sub_path);

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;

}

} else {

/* Skip files for which the sticky bit is

if (s.st_mode & S_ISVTX) {

log_debug("Skipping \"%s\": sticky bit set.", sub_path);

continue;

}

if (mountpoint && S_ISREG(s.st_mode))

if (s.st_uid == 0 && STR_IN_SET(dent->d_name,

".journal",

"aquota.user",

"aquota.group")) {

log_debug("Skipping \"%s\".", sub_path);

continue;

}

/* Ignore sockets that are listed in /proc/net/unix */

if (S_ISSOCK(s.st_mode) && unix_socket_alive(sub_path)) {

log_debug("Skipping \"%s\": live socket.", sub_path);

continue;

}

/* Ignore device nodes */

if (S_ISCHR(s.st_mode) || S_ISBLK(s.st_mode)) {

log_debug("Skipping \"%s\": a device.", sub_path);

continue;

}

/* Keep files on this level around if this is

if (keep_this_level) {

log_debug("Keeping \"%s\".", sub_path);

continue;

}

age = timespec_load(&s.st_mtim);

if (age >= cutoff) {

char a[FORMAT_TIMESTAMP_MAX];

/* Follows spelling in stat(1). */

log_debug("File \"%s\": modify time %s is too new.",

sub_path,

format_timestamp_us(a, sizeof(a), age));

continue;

}

age = timespec_load(&s.st_atim);

if (age >= cutoff) {

char a[FORMAT_TIMESTAMP_MAX];

log_debug("File \"%s\": access time %s is too new.",

sub_path,

format_timestamp_us(a, sizeof(a), age));

continue;

}

age = timespec_load(&s.st_ctim);

if (age >= cutoff) {

char a[FORMAT_TIMESTAMP_MAX];

log_debug("File \"%s\": change time %s is too new.",

sub_path,

format_timestamp_us(a, sizeof(a), age));

continue;

}

log_debug("unlink \"%s\"", sub_path);

if (unlinkat(dirfd(d), dent->d_name, 0) < 0)

if (errno != ENOENT)

r = log_error_errno(errno, "unlink(%s): %m", sub_path);

deleted = true;

}

}

finish:

if (deleted) {

usec_t age1, age2;

char a[FORMAT_TIMESTAMP_MAX], b[FORMAT_TIMESTAMP_MAX];

/* Restore original directory timestamps */

times[0] = ds->st_atim;

times[1] = ds->st_mtim;

age1 = timespec_load(&ds->st_atim);

age2 = timespec_load(&ds->st_mtim);

log_debug("Restoring access and modification time on \"%s\": %s, %s",

p,

format_timestamp_us(a, sizeof(a), age1),

format_timestamp_us(b, sizeof(b), age2));

if (futimens(dirfd(d), times) < 0)

log_error_errno(errno, "utimensat(%s): %m", p);

}

return r;

}

static int path_set_perms(Item *i, const char *path) {

_cleanup_close_ int fd = -1;

struct stat st;

assert(i);

assert(path);

/* We open the file with O_PATH here, to make the operation

fd = open(path, O_RDONLY|O_NOFOLLOW|O_CLOEXEC|O_PATH|O_NOATIME);

if (fd < 0)

return log_error_errno(errno, "Adjusting owner and mode for %s failed: %m", path);

if (fstatat(fd, "", &st, AT_EMPTY_PATH) < 0)

return log_error_errno(errno, "Failed to fstat() file %s: %m", path);

if (S_ISLNK(st.st_mode))

log_debug("Skipping mode an owner fix for symlink %s.", path);

else {

char fn[strlen("/proc/self/fd/") + DECIMAL_STR_MAX(int)];

xsprintf(fn, "/proc/self/fd/%i", fd);

/* not using i->path directly because it may be a glob */

if (i->mode_set) {

mode_t m = i->mode;

if (i->mask_perms) {

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 (m == (st.st_mode & 07777))

log_debug("\"%s\" has right mode %o", path, st.st_mode);

else {

log_debug("chmod \"%s\" to mode %o", path, m);

if (chmod(fn, m) < 0)

return log_error_errno(errno, "chmod(%s) failed: %m", path);

}

}

if ((i->uid != st.st_uid || i->gid != st.st_gid) &&

(i->uid_set || i->gid_set)) {

log_debug("chown \"%s\" to "UID_FMT"."GID_FMT,

path,

i->uid_set ? i->uid : UID_INVALID,

i->gid_set ? i->gid : GID_INVALID);

if (chown(fn,

i->uid_set ? i->uid : UID_INVALID,

i->gid_set ? i->gid : GID_INVALID) < 0)

return log_error_errno(errno, "chown(%s) failed: %m", path);

}

}

fd = safe_close(fd);

return label_fix(path, false, false);

}

static int parse_xattrs_from_arg(Item *i) {

const char *p;

int r;

assert(i);

assert(i->argument);

p = i->argument;

for (;;) {

_cleanup_free_ char *name = NULL, *value = NULL, *xattr = NULL, *xattr_replaced = NULL;

r = extract_first_word(&p, &xattr, NULL, EXTRACT_QUOTES|EXTRACT_CUNESCAPE);

if (r < 0)

log_warning_errno(r, "Failed to parse extended attribute '%s', ignoring: %m", p);

if (r <= 0)

break;

r = specifier_printf(xattr, specifier_table, NULL, &xattr_replaced);

if (r < 0)

return log_error_errno(r, "Failed to replace specifiers in extended attribute '%s': %m", xattr);

r = split_pair(xattr_replaced, "=", &name, &value);

if (r < 0) {

log_warning_errno(r, "Failed to parse extended attribute, ignoring: %s", xattr);

continue;

}

if (isempty(name) || isempty(value)) {

log_warning("Malformed extended attribute found, ignoring: %s", xattr);

continue;

}

if (strv_push_pair(&i->xattrs, name, value) < 0)

return log_oom();

name = value = NULL;

}

return 0;

}

static int path_set_xattrs(Item *i, const char *path) {

char **name, **value;

assert(i);

assert(path);

STRV_FOREACH_PAIR(name, value, i->xattrs) {

int n;

n = strlen(*value);

log_debug("Setting extended attribute '%s=%s' on %s.", *name, *value, path);

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 parse_acls_from_arg(Item *item) {

#ifdef HAVE_ACL

int r;

assert(item);

/* If force (= modify) is set, we will not modify the acl

r = parse_acl(item->argument, &item->acl_access, &item->acl_default, !item->force);

if (r < 0)

log_warning_errno(r, "Failed to parse ACL \"%s\": %m. Ignoring", item->argument);

#else

log_warning_errno(ENOSYS, "ACLs are not supported. Ignoring");

#endif

return 0;

}

#ifdef HAVE_ACL

static int path_set_acl(const char *path, const char *pretty, acl_type_t type, acl_t acl, bool modify) {

_cleanup_(acl_free_charpp) char *t = NULL;

_cleanup_(acl_freep) acl_t dup = NULL;

int r;

/* Returns 0 for success, positive error if already warned,

if (modify) {

r = acls_for_file(path, type, acl, &dup);

if (r < 0)

return r;

r = calc_acl_mask_if_needed(&dup);

if (r < 0)

return r;

} else {

dup = acl_dup(acl);

if (!dup)

return -errno;

/* the mask was already added earlier if needed */

}

r = add_base_acls_if_needed(&dup, path);

if (r < 0)

return r;

t = acl_to_any_text(dup, NULL, ',', TEXT_ABBREVIATE);

log_debug("Setting %s ACL %s on %s.",

type == ACL_TYPE_ACCESS ? "access" : "default",

strna(t), pretty);

r = acl_set_file(path, type, dup);

if (r < 0)

/* Return positive to indicate we already warned */

return -log_error_errno(errno,

"Setting %s ACL \"%s\" on %s failed: %m",

type == ACL_TYPE_ACCESS ? "access" : "default",

strna(t), pretty);

return 0;

}

#endif

static int path_set_acls(Item *item, const char *path) {

int r = 0;

#ifdef HAVE_ACL

char fn[strlen("/proc/self/fd/") + DECIMAL_STR_MAX(int)];

_cleanup_close_ int fd = -1;

struct stat st;

assert(item);

assert(path);

fd = open(path, O_RDONLY|O_NOFOLLOW|O_CLOEXEC|O_PATH|O_NOATIME);

if (fd < 0)

return log_error_errno(errno, "Adjusting ACL of %s failed: %m", path);

if (fstatat(fd, "", &st, AT_EMPTY_PATH) < 0)

return log_error_errno(errno, "Failed to fstat() file %s: %m", path);

if (S_ISLNK(st.st_mode)) {

log_debug("Skipping ACL fix for symlink %s.", path);

return 0;

}

xsprintf(fn, "/proc/self/fd/%i", fd);

if (item->acl_access)

r = path_set_acl(fn, path, ACL_TYPE_ACCESS, item->acl_access, item->force);

if (r == 0 && item->acl_default)

r = path_set_acl(fn, path, ACL_TYPE_DEFAULT, item->acl_default, item->force);

if (r > 0)

return -r; /* already warned */

else if (r == -EOPNOTSUPP) {

log_debug_errno(r, "ACLs not supported by file system at %s", path);

return 0;

} else if (r < 0)

log_error_errno(r, "ACL operation on \"%s\" failed: %m", path);

#endif

return r;

}

#define ATTRIBUTES_ALL \

(FS_NOATIME_FL | \

FS_SYNC_FL | \

FS_DIRSYNC_FL | \

FS_APPEND_FL | \

FS_COMPR_FL | \

FS_NODUMP_FL | \

FS_EXTENT_FL | \

FS_IMMUTABLE_FL | \

FS_JOURNAL_DATA_FL | \

FS_SECRM_FL | \

FS_UNRM_FL | \

FS_NOTAIL_FL | \

FS_TOPDIR_FL | \

FS_NOCOW_FL)

static int parse_attribute_from_arg(Item *item) {

static const struct {

char character;

unsigned value;

} attributes[] = {

{ 'A', FS_NOATIME_FL }, /* do not update atime */

{ 'S', FS_SYNC_FL }, /* Synchronous updates */

{ 'D', FS_DIRSYNC_FL }, /* dirsync behaviour (directories only) */

{ 'a', FS_APPEND_FL }, /* writes to file may only append */

{ 'c', FS_COMPR_FL }, /* Compress file */

{ 'd', FS_NODUMP_FL }, /* do not dump file */

{ 'e', FS_EXTENT_FL }, /* Top of directory hierarchies*/

{ 'i', FS_IMMUTABLE_FL }, /* Immutable file */

{ 'j', FS_JOURNAL_DATA_FL }, /* Reserved for ext3 */

{ 's', FS_SECRM_FL }, /* Secure deletion */

{ 'u', FS_UNRM_FL }, /* Undelete */

{ 't', FS_NOTAIL_FL }, /* file tail should not be merged */

{ 'T', FS_TOPDIR_FL }, /* Top of directory hierarchies*/

{ 'C', FS_NOCOW_FL }, /* Do not cow file */

};

enum {

MODE_ADD,

MODE_DEL,

MODE_SET

} mode = MODE_ADD;

unsigned value = 0, mask = 0;

const char *p;

assert(item);

p = item->argument;

if (p) {

if (*p == '+') {

mode = MODE_ADD;

p++;

} else if (*p == '-') {

mode = MODE_DEL;

p++;

} else if (*p == '=') {

mode = MODE_SET;

p++;

}

}

if (isempty(p) && mode != MODE_SET) {

log_error("Setting file attribute on '%s' needs an attribute specification.", item->path);

return -EINVAL;

}

for (; p && *p ; p++) {

unsigned i, v;

for (i = 0; i < ELEMENTSOF(attributes); i++)

if (*p == attributes[i].character)

break;

if (i >= ELEMENTSOF(attributes)) {

log_error("Unknown file attribute '%c' on '%s'.", *p, item->path);

return -EINVAL;

}

v = attributes[i].value;

if (mode == MODE_ADD || mode == MODE_SET)

value |= v;

else

value &= ~v;

mask |= v;

}

if (mode == MODE_SET)

mask |= ATTRIBUTES_ALL;

assert(mask != 0);

item->attribute_mask = mask;

item->attribute_value = value;

item->attribute_set = true;

return 0;

}

static int path_set_attribute(Item *item, const char *path) {

_cleanup_close_ int fd = -1;

struct stat st;

unsigned f;

int r;

if (!item->attribute_set || item->attribute_mask == 0)

return 0;

fd = open(path, O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_NOATIME|O_NOFOLLOW);

if (fd < 0) {

if (errno == ELOOP)

return log_error_errno(errno, "Skipping file attributes adjustment on symlink %s.", path);

return log_error_errno(errno, "Cannot open '%s': %m", path);

}

if (fstat(fd, &st) < 0)

return log_error_errno(errno, "Cannot stat '%s': %m", path);

/* Issuing the file attribute ioctls on device nodes is not

if (!S_ISREG(st.st_mode) && !S_ISDIR(st.st_mode)) {

log_error("Setting file flags is only supported on regular files and directories, cannot set on '%s'.", path);

return -EINVAL;

}

f = item->attribute_value & item->attribute_mask;

/* Mask away directory-specific flags */

if (!S_ISDIR(st.st_mode))

f &= ~FS_DIRSYNC_FL;

r = chattr_fd(fd, f, item->attribute_mask);

if (r < 0)

log_full_errno(r == -ENOTTY ? LOG_DEBUG : LOG_WARNING,

r,

"Cannot set file attribute for '%s', value=0x%08x, mask=0x%08x: %m",

path, item->attribute_value, item->attribute_mask);

return 0;

}

static int write_one_file(Item *i, const char *path) {

_cleanup_close_ int fd = -1;

int flags, r = 0;

struct stat st;

assert(i);

assert(path);

flags = i->type == CREATE_FILE ? O_CREAT|O_APPEND|O_NOFOLLOW :

i->type == TRUNCATE_FILE ? O_CREAT|O_TRUNC|O_NOFOLLOW : 0;

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 (fd < 0) {

if (i->type == WRITE_FILE && errno == ENOENT) {

log_debug_errno(errno, "Not writing \"%s\": %m", path);

return 0;

}

r = -errno;

if (!i->argument && errno == EROFS && stat(path, &st) == 0 &&

(i->type == CREATE_FILE || st.st_size == 0))

goto check_mode;

return log_error_errno(r, "Failed to create file %s: %m", path);

}

if (i->argument) {

_cleanup_free_ char *unescaped = NULL, *replaced = NULL;

log_debug("%s to \"%s\".", i->type == CREATE_FILE ? "Appending" : "Writing", path);

r = cunescape(i->argument, 0, &unescaped);

if (r < 0)

return log_error_errno(r, "Failed to unescape parameter to write: %s", i->argument);

r = specifier_printf(unescaped, specifier_table, NULL, &replaced);

if (r < 0)

return log_error_errno(r, "Failed to replace specifiers in parameter to write '%s': %m", unescaped);

r = loop_write(fd, replaced, strlen(replaced), false);

if (r < 0)

return log_error_errno(r, "Failed to write file \"%s\": %m", path);

} else

log_debug("\"%s\" has been created.", path);

fd = safe_close(fd);

if (stat(path, &st) < 0)

return log_error_errno(errno, "stat(%s) failed: %m", path);

check_mode:

if (!S_ISREG(st.st_mode)) {

log_error("%s is not a file.", path);

return -EEXIST;

}

r = path_set_perms(i, path);

if (r < 0)

return r;

return 0;

}

typedef int (*action_t)(Item *, const char *);

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

d = opendir_nomod(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 (STR_IN_SET(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, action_t action, bool recursive) {

_cleanup_globfree_ glob_t g = {

.gl_closedir = (void (*)(void *)) closedir,

.gl_readdir = (struct dirent *(*)(void *)) readdir,

.gl_opendir = (void *(*)(const char *)) opendir_nomod,

.gl_lstat = lstat,

.gl_stat = stat,

};

int r = 0, k;

char **fn;

errno = 0;

k = glob(i->path, GLOB_NOSORT|GLOB_BRACE|GLOB_ALTDIRFUNC, NULL, &g);

if (k != 0 && k != GLOB_NOMATCH)

return log_error_errno(errno ?: EIO, "glob(%s) failed: %m", i->path);

STRV_FOREACH(fn, g.gl_pathv) {

k = action(i, *fn);

if (k < 0 && r == 0)

r = k;

if (recursive) {

k = item_do_children(i, *fn, action);

if (k < 0 && r == 0)

r = k;

}

}

return r;

}

typedef enum {

CREATION_NORMAL,

CREATION_EXISTING,

CREATION_FORCE,

_CREATION_MODE_MAX,

_CREATION_MODE_INVALID = -1

} CreationMode;

static const char *creation_mode_verb_table[_CREATION_MODE_MAX] = {

[CREATION_NORMAL] = "Created",

[CREATION_EXISTING] = "Found existing",

[CREATION_FORCE] = "Created replacement",

};

DEFINE_PRIVATE_STRING_TABLE_LOOKUP_TO_STRING(creation_mode_verb, CreationMode);

static int create_item(Item *i) {

_cleanup_free_ char *resolved = NULL;

struct stat st;

int r = 0;

CreationMode creation;

assert(i);

log_debug("Running create action for entry %c %s", (char) i->type, i->path);

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:

r = write_one_file(i, i->path);

if (r < 0)

return r;

break;

case COPY_FILES: {

r = specifier_printf(i->argument, specifier_table, NULL, &resolved);

if (r < 0)

return log_error_errno(r, "Failed to substitute specifiers in copy source %s: %m", i->argument);

log_debug("Copying tree \"%s\" to \"%s\".", resolved, i->path);

r = copy_tree(resolved, i->path, false);

if (r == -EROFS && stat(i->path, &st) == 0)

r = -EEXIST;

if (r < 0) {

struct stat a, b;

if (r != -EEXIST)

return log_error_errno(r, "Failed to copy files to %s: %m", i->path);

if (stat(resolved, &a) < 0)

return log_error_errno(errno, "stat(%s) failed: %m", resolved);

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);

return 0;

}

}

r = path_set_perms(i, i->path);

if (r < 0)

return r;

break;

case WRITE_FILE:

r = glob_item(i, write_one_file, false);

if (r < 0)

return r;

break;

case CREATE_DIRECTORY:

case TRUNCATE_DIRECTORY:

case CREATE_SUBVOLUME:

case CREATE_SUBVOLUME_INHERIT_QUOTA:

case CREATE_SUBVOLUME_NEW_QUOTA:

RUN_WITH_UMASK(0000)

mkdir_parents_label(i->path, 0755);

if (IN_SET(i->type, CREATE_SUBVOLUME, CREATE_SUBVOLUME_INHERIT_QUOTA, CREATE_SUBVOLUME_NEW_QUOTA)) {

RUN_WITH_UMASK((~i->mode) & 0777)

r = btrfs_subvol_make(i->path);

} else

r = 0;

if (IN_SET(i->type, CREATE_DIRECTORY, TRUNCATE_DIRECTORY) || r == -ENOTTY)

RUN_WITH_UMASK(0000)

r = mkdir_label(i->path, i->mode);

if (r < 0) {

int k;

if (r != -EEXIST && r != -EROFS)

return log_error_errno(r, "Failed to create directory or subvolume \"%s\": %m", i->path);

k = is_dir(i->path, false);

if (k == -ENOENT && r == -EROFS)

return log_error_errno(r, "%s does not exist and cannot be created as the file system is read-only.", i->path);

if (k < 0)

return log_error_errno(k, "Failed to check if %s exists: %m", i->path);

if (!k) {

log_warning("\"%s\" already exists and is not a directory.", i->path);

return 0;

}

creation = CREATION_EXISTING;

} else

creation = CREATION_NORMAL;

log_debug("%s directory \"%s\".", creation_mode_verb_to_string(creation), i->path);

if (IN_SET(i->type, CREATE_SUBVOLUME_NEW_QUOTA, CREATE_SUBVOLUME_INHERIT_QUOTA)) {

r = btrfs_subvol_auto_qgroup(i->path, 0, i->type == CREATE_SUBVOLUME_NEW_QUOTA);

if (r == -ENOTTY) {

log_debug_errno(r, "Couldn't adjust quota for subvolume \"%s\" because of unsupported file system or because directory is not a subvolume: %m", i->path);

return 0;

}

if (r == -EROFS) {

log_debug_errno(r, "Couldn't adjust quota for subvolume \"%s\" because of read-only file system: %m", i->path);

return 0;

}

if (r < 0)

return log_error_errno(r, "Failed to adjust quota for subvolume \"%s\": %m", i->path);

if (r > 0)

log_debug("Adjusted quota for subvolume \"%s\".", i->path);

if (r == 0)

log_debug("Quota for subvolume \"%s\" already in place, no change made.", i->path);

}

r = path_set_perms(i, i->path);

if (r < 0)

return r;

break;

case CREATE_FIFO:

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 (r < 0) {

if (errno != EEXIST)

return log_error_errno(errno, "Failed to create fifo %s: %m", i->path);

if (lstat(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) {

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);

creation = CREATION_FORCE;

} else {

log_warning("\"%s\" already exists and is not a fifo.", i->path);

return 0;

}

} else

creation = CREATION_EXISTING;

} else

creation = CREATION_NORMAL;

log_debug("%s fifo \"%s\".", creation_mode_verb_to_string(creation), i->path);

r = path_set_perms(i, i->path);

if (r < 0)

return r;

break;

}

case CREATE_SYMLINK: {

r = specifier_printf(i->argument, specifier_table, NULL, &resolved);

if (r < 0)

return log_error_errno(r, "Failed to substitute specifiers in symlink target %s: %m", i->argument);

mac_selinux_create_file_prepare(i->path, S_IFLNK);

r = symlink(resolved, i->path);

mac_selinux_create_file_clear();

if (r < 0) {

_cleanup_free_ char *x = NULL;

if (errno != EEXIST)

return log_error_errno(errno, "symlink(%s, %s) failed: %m", resolved, i->path);

r = readlink_malloc(i->path, &x);

if (r < 0 || !streq(resolved, x)) {

if (i->force) {

mac_selinux_create_file_prepare(i->path, S_IFLNK);

r = symlink_atomic(resolved, i->path);

mac_selinux_create_file_clear();

if (r < 0)

return log_error_errno(r, "symlink(%s, %s) failed: %m", resolved, i->path);

creation = CREATION_FORCE;

} else {

log_debug("\"%s\" is not a symlink or does not point to the correct path.", i->path);

return 0;

}

} else

creation = CREATION_EXISTING;

} else

creation = CREATION_NORMAL;

log_debug("%s symlink \"%s\".", creation_mode_verb_to_string(creation), i->path);

break;

}

case CREATE_BLOCK_DEVICE:

case CREATE_CHAR_DEVICE: {

mode_t file_type;

if (have_effective_cap(CAP_MKNOD) == 0) {

/* In a container we lack CAP_MKNOD. We

log_debug("We lack CAP_MKNOD, skipping creation of device node %s.", i->path);

return 0;

}

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 (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 (lstat(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);

creation = CREATION_FORCE;

} else {

log_debug("%s is not a device node.", i->path);

return 0;

}

} else

creation = CREATION_EXISTING;

} else

creation = CREATION_NORMAL;

log_debug("%s %s device node \"%s\" %u:%u.",

creation_mode_verb_to_string(creation),

i->type == CREATE_BLOCK_DEVICE ? "block" : "char",

i->path, major(i->mode), minor(i->mode));

r = path_set_perms(i, i->path);

if (r < 0)

return r;

break;

}

case ADJUST_MODE:

case RELABEL_PATH:

r = glob_item(i, path_set_perms, false);

if (r < 0)

return r;

break;

case RECURSIVE_RELABEL_PATH:

r = glob_item(i, path_set_perms, true);

if (r < 0)

return r;

break;

case SET_XATTR:

r = glob_item(i, path_set_xattrs, false);

if (r < 0)

return r;

break;

case RECURSIVE_SET_XATTR:

r = glob_item(i, path_set_xattrs, true);

if (r < 0)

return r;

break;

case SET_ACL:

r = glob_item(i, path_set_acls, false);

if (r < 0)

return r;

break;

case RECURSIVE_SET_ACL:

r = glob_item(i, path_set_acls, true);

if (r < 0)

return r;

break;

case SET_ATTRIBUTE:

r = glob_item(i, path_set_attribute, false);

if (r < 0)

return r;

break;

case RECURSIVE_SET_ATTRIBUTE:

r = glob_item(i, path_set_attribute, true);

if (r < 0)

return r;

break;

}

return 0;

}

static int remove_item_instance(Item *i, const char *instance) {

int r;

assert(i);

switch (i->type) {

case REMOVE_PATH:

if (remove(instance) < 0 && errno != ENOENT)

return log_error_errno(errno, "rm(%s): %m", instance);

break;

case TRUNCATE_DIRECTORY:

case RECURSIVE_REMOVE_PATH:

/* FIXME: we probably should use dir_cleanup() here

log_debug("rm -rf \"%s\"", instance);

r = rm_rf(instance, (i->type == RECURSIVE_REMOVE_PATH ? REMOVE_ROOT|REMOVE_SUBVOLUME : 0) | REMOVE_PHYSICAL);

if (r < 0 && r != -ENOENT)

return log_error_errno(r, "rm_rf(%s): %m", instance);

break;

default:

assert_not_reached("wut?");

}

return 0;

}

static int remove_item(Item *i) {

int r = 0;

assert(i);

log_debug("Running remove action for entry %c %s", (char) i->type, i->path);

switch (i->type) {

case CREATE_FILE:

case TRUNCATE_FILE:

case CREATE_DIRECTORY:

case CREATE_SUBVOLUME:

case CREATE_SUBVOLUME_INHERIT_QUOTA:

case CREATE_SUBVOLUME_NEW_QUOTA:

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 RECURSIVE_SET_XATTR:

case SET_ACL:

case RECURSIVE_SET_ACL:

case SET_ATTRIBUTE:

case RECURSIVE_SET_ATTRIBUTE:

break;

case REMOVE_PATH:

case TRUNCATE_DIRECTORY:

case RECURSIVE_REMOVE_PATH:

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;

usec_t cutoff, n;

char timestamp[FORMAT_TIMESTAMP_MAX];

assert(i);

if (!i->age_set)

return 0;

n = now(CLOCK_REALTIME);

if (n < i->age)

return 0;

cutoff = n - i->age;

d = opendir_nomod(instance);

if (!d) {

if (errno == ENOENT || errno == ENOTDIR) {

log_debug_errno(errno, "Directory \"%s\": %m", instance);

return 0;

}

log_error_errno(errno, "Failed to open directory %s: %m", instance);

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_ino == ps.st_ino;

log_debug("Cleanup threshold for %s \"%s\" is %s",

mountpoint ? "mount point" : "directory",

instance,

format_timestamp_us(timestamp, sizeof(timestamp), cutoff));

return dir_cleanup(i, instance, d, &s, cutoff, s.st_dev, mountpoint,

MAX_DEPTH, i->keep_first_level);

}

static int clean_item(Item *i) {

int r = 0;

assert(i);

log_debug("Running clean action for entry %c %s", (char) i->type, i->path);

switch (i->type) {

case CREATE_DIRECTORY:

case CREATE_SUBVOLUME:

case CREATE_SUBVOLUME_INHERIT_QUOTA:

case CREATE_SUBVOLUME_NEW_QUOTA:

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, 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 = ordered_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;

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);

for (n = 0; n < array->count; n++) {

k = process_item(array->items + n);

if (k < 0 && r == 0)

r = k;

}

return r;

}

static void item_free_contents(Item *i) {

assert(i);

free(i->path);

free(i->argument);

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 int item_compare(const void *a, const void *b) {

const Item *x = a, *y = b;

/* Make sure that the ownership taking item is put first, so

if (takes_ownership(x->type) && !takes_ownership(y->type))

return -1;

if (!takes_ownership(x->type) && takes_ownership(y->type))

return 1;

return (int) x->type - (int) y->type;

}

static bool item_compatible(Item *a, Item *b) {

assert(a);

assert(b);

assert(streq(a->path, b->path));

if (takes_ownership(a->type) && takes_ownership(b->type))

/* check if the items are the same */

return streq_ptr(a->argument, b->argument) &&

a->uid_set == b->uid_set &&

a->uid == b->uid &&

a->gid_set == b->gid_set &&

a->gid == b->gid &&

a->mode_set == b->mode_set &&

a->mode == b->mode &&

a->age_set == b->age_set &&

a->age == b->age &&

a->mask_perms == b->mask_perms &&

a->keep_first_level == b->keep_first_level &&

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)) {

log_debug("Entry \"%s\" matches exclude prefix \"%s\", skipping.",

path, *prefix);

return false;

}

STRV_FOREACH(prefix, arg_include_prefixes)

if (path_startswith(path, *prefix)) {

log_debug("Entry \"%s\" matches include prefix \"%s\".", path, *prefix);

return true;

}

/* no matches, so we should include this path only if we

if (strv_length(arg_include_prefixes) == 0)

return true;

log_debug("Entry \"%s\" does not match any include prefix, skipping.", path);

return false;

}

static int parse_line(const char *fname, unsigned line, const char *buffer) {

_cleanup_free_ char *action = NULL, *mode = NULL, *user = NULL, *group = NULL, *age = NULL, *path = NULL;

_cleanup_(item_free_contents) Item i = {};

ItemArray *existing;

OrderedHashmap *h;

int r, pos;

bool force = false, boot = false;

assert(fname);

assert(line >= 1);

assert(buffer);

r = extract_many_words(

&buffer,

NULL,

EXTRACT_QUOTES,

&action,

&path,

&mode,

&user,

&group,

&age,

NULL);

if (r < 0)

return log_error_errno(r, "[%s:%u] Failed to parse line: %m", fname, line);

else if (r < 2) {

log_error("[%s:%u] Syntax error.", fname, line);

return -EIO;

}

if (!isempty(buffer) && !streq(buffer, "-")) {

i.argument = strdup(buffer);

if (!i.argument)

return log_oom();

}

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) {

log_debug("Ignoring entry %s \"%s\" because --boot is not specified.",

action, path);

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;

}

switch (i.type) {

case CREATE_DIRECTORY:

case CREATE_SUBVOLUME:

case CREATE_SUBVOLUME_INHERIT_QUOTA:

case CREATE_SUBVOLUME_NEW_QUOTA:

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:

if (i.argument)

log_warning("[%s:%u] %c lines don't take argument fields, ignoring.", fname, line, i.type);

break;

case CREATE_FILE:

case TRUNCATE_FILE:

break;

case CREATE_SYMLINK:

if (!i.argument) {

i.argument = strappend("/usr/share/factory/", i.path);

if (!i.argument)

return log_oom();

}

break;

case WRITE_FILE:

if (!i.argument) {

log_error("[%s:%u] Write file requires argument.", fname, line);

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) {

log_error("[%s:%u] Device file requires argument.", fname, line);

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);

return -EBADMSG;

}

i.major_minor = makedev(major, minor);

break;

}

case SET_XATTR:

case RECURSIVE_SET_XATTR:

if (!i.argument) {

log_error("[%s:%u] Set extended attribute requires argument.", fname, line);

return -EBADMSG;

}

r = parse_xattrs_from_arg(&i);

if (r < 0)

return r;

break;

case SET_ACL:

case RECURSIVE_SET_ACL:

if (!i.argument) {

log_error("[%s:%u] Set ACLs requires argument.", fname, line);

return -EBADMSG;

}

r = parse_acls_from_arg(&i);

if (r < 0)

return r;

break;

case SET_ATTRIBUTE:

case RECURSIVE_SET_ATTRIBUTE:

if (!i.argument) {

log_error("[%s:%u] Set file attribute requires argument.", fname, line);

return -EBADMSG;

}

r = parse_attribute_from_arg(&i);

if (r < 0)

return r;

break;

default:

log_error("[%s:%u] Unknown command type '%c'.", fname, line, (char) i.type);

return -EBADMSG;

}

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);

if (!should_include_path(i.path))

return 0;

if (arg_root) {

char *p;

p = prefix_root(arg_root, i.path);

if (!p)

return log_oom();

free(i.path);

i.path = p;

}

if (!isempty(user) && !streq(user, "-")) {

const char *u = user;

r = get_user_creds(&u, &i.uid, NULL, NULL, NULL);

if (r < 0) {

log_error("[%s:%u] Unknown user '%s'.", fname, line, user);

return r;

}

i.uid_set = true;

}

if (!isempty(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);

return r;

}

i.gid_set = true;

}

if (!isempty(mode) && !streq(mode, "-")) {

const char *mm = mode;

unsigned m;

if (*mm == '~') {

i.mask_perms = true;

mm++;

}

if (parse_mode(mm, &m) < 0) {

log_error("[%s:%u] Invalid mode '%s'.", fname, line, mode);

return -EBADMSG;

}

i.mode = m;

i.mode_set = true;

} else

i.mode = IN_SET(i.type, CREATE_DIRECTORY, TRUNCATE_DIRECTORY, CREATE_SUBVOLUME, CREATE_SUBVOLUME_INHERIT_QUOTA, CREATE_SUBVOLUME_NEW_QUOTA) ? 0755 : 0644;

if (!isempty(age) && !streq(age, "-")) {

const char *a = age;

if (*a == '~') {

i.keep_first_level = true;

a++;

}

if (parse_sec(a, &i.age) < 0) {

log_error("[%s:%u] Invalid age '%s'.", fname, line, age);

return -EBADMSG;

}

i.age_set = true;

}

h = needs_glob(i.type) ? globs : items;

existing = ordered_hashmap_get(h, i.path);

if (existing) {

unsigned n;

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);

return 0;

}

}

} else {

existing = new0(ItemArray, 1);

r = ordered_hashmap_put(h, i.path, existing);

if (r < 0)

return log_oom();

}

if (!GREEDY_REALLOC(existing->items, existing->size, existing->count + 1))

return log_oom();

memcpy(existing->items + existing->count++, &i, sizeof(i));

/* Sort item array, to enforce stable ordering of application */

qsort_safe(existing->items, existing->count, sizeof(Item), item_compare);

zero(i);

return 0;

}

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"

" --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 with the specified prefix\n"

" --exclude-prefix=PATH Ignore rules with the specified prefix\n"

" --root=PATH Operate on an alternate filesystem root\n",

program_invocation_short_name);

}

static int parse_argv(int argc, char *argv[]) {

enum {

ARG_VERSION = 0x100,

ARG_CREATE,

ARG_CLEAN,

ARG_REMOVE,

ARG_BOOT,

ARG_PREFIX,

ARG_EXCLUDE_PREFIX,

ARG_ROOT,

};

static const struct option options[] = {

{ "help", no_argument, NULL, 'h' },

{ "version", no_argument, NULL, ARG_VERSION },

{ "create", no_argument, NULL, ARG_CREATE },

{ "clean", no_argument, NULL, ARG_CLEAN },

{ "remove", no_argument, NULL, ARG_REMOVE },

{ "boot", no_argument, NULL, ARG_BOOT },

{ "prefix", required_argument, NULL, ARG_PREFIX },

{ "exclude-prefix", required_argument, NULL, ARG_EXCLUDE_PREFIX },

{ "root", required_argument, NULL, ARG_ROOT },

{}

};

int c, r;

assert(argc >= 0);

assert(argv);

while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0)

switch (c) {

case 'h':

help();

return 0;

case ARG_VERSION:

return version();

case ARG_CREATE:

arg_create = true;

break;

case ARG_CLEAN:

arg_clean = true;

break;

case ARG_REMOVE:

arg_remove = true;

break;

case ARG_BOOT:

arg_boot = true;

break;

case ARG_PREFIX:

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:

r = parse_path_argument_and_warn(optarg, true, &arg_root);

if (r < 0)

return r;

break;

case '?':

return -EINVAL;

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.");

return -EINVAL;

}

return 1;

}

static int read_config_file(const char *fn, bool ignore_enoent) {

_cleanup_fclose_ FILE *f = NULL;

char line[LINE_MAX];

Iterator iterator;

unsigned v = 0;

Item *i;

int r;

assert(fn);

r = search_and_fopen_nulstr(fn, "re", arg_root, conf_file_dirs, &f);

if (r < 0) {

if (ignore_enoent && r == -ENOENT) {

log_debug_errno(r, "Failed to open \"%s\": %m", fn);

return 0;

}

return log_error_errno(r, "Failed to open '%s', ignoring: %m", fn);

}

log_debug("Reading config file \"%s\".", fn);

FOREACH_LINE(line, f, break) {

char *l;

int k;

v++;

l = strstrip(line);

if (*l == '#' || *l == 0)

continue;

k = parse_line(fn, v, l);

if (k < 0 && r == 0)

r = k;

}

/* we have to determine age parameter for each entry of type X */

ORDERED_HASHMAP_FOREACH(i, globs, iterator) {

Iterator iter;

Item *j, *candidate_item = NULL;

if (i->type != IGNORE_DIRECTORY_PATH)

continue;

ORDERED_HASHMAP_FOREACH(j, items, iter) {

if (!IN_SET(j->type, CREATE_DIRECTORY, TRUNCATE_DIRECTORY, CREATE_SUBVOLUME, CREATE_SUBVOLUME_INHERIT_QUOTA, CREATE_SUBVOLUME_NEW_QUOTA))

continue;

if (path_equal(j->path, i->path)) {

candidate_item = j;

break;

}

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 (candidate_item && candidate_item->age_set) {

i->age = candidate_item->age;

i->age_set = true;

}

}

if (ferror(f)) {

log_error_errno(errno, "Failed to read from file %s: %m", fn);

if (r == 0)

r = -EIO;

}

return r;

}

int main(int argc, char *argv[]) {

int r, k;

ItemArray *a;

Iterator iterator;

r = parse_argv(argc, argv);

if (r <= 0)

goto finish;

log_set_target(LOG_TARGET_AUTO);

log_parse_environment();

log_open();

umask(0022);

mac_selinux_init(NULL);

items = ordered_hashmap_new(&string_hash_ops);

globs = ordered_hashmap_new(&string_hash_ops);

if (!items || !globs) {

r = log_oom();

goto finish;

}

r = 0;

if (optind < argc) {

int j;

for (j = optind; j < argc; j++) {

k = read_config_file(argv[j], false);

if (k < 0 && r == 0)

r = k;

}

} else {

_cleanup_strv_free_ char **files = NULL;

char **f;

r = conf_files_list_nulstr(&files, ".conf", arg_root, conf_file_dirs);

if (r < 0) {

log_error_errno(r, "Failed to enumerate tmpfiles.d files: %m");

goto finish;

}

STRV_FOREACH(f, files) {

k = read_config_file(*f, true);

if (k < 0 && r == 0)

r = k;

}

}

/* The non-globbing ones usually create things, hence we apply

ORDERED_HASHMAP_FOREACH(a, items, iterator) {

k = process_item_array(a);

if (k < 0 && r == 0)

r = k;

}

/* The globbing ones usually alter things, hence we apply them

ORDERED_HASHMAP_FOREACH(a, globs, iterator) {

k = process_item_array(a);

if (k < 0 && r == 0)

r = k;

}

finish:

while ((a = ordered_hashmap_steal_first(items)))

item_array_free(a);

while ((a = ordered_hashmap_steal_first(globs)))

item_array_free(a);

ordered_hashmap_free(items);

ordered_hashmap_free(globs);

free(arg_include_prefixes);

free(arg_exclude_prefixes);

free(arg_root);

set_free_free(unix_sockets);

mac_selinux_finish();

return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;

}