/* SPDX-License-Identifier: LGPL-2.1+ */
-/***
- This file is part of systemd.
-
- Copyright 2010 Lennart Poettering, Kay Sievers
- Copyright 2015 Zbigniew Jędrzejewski-Szmek
-***/
#include <errno.h>
#include <fcntl.h>
#include "missing.h"
#include "mkdir.h"
#include "mount-util.h"
+#include "pager.h"
#include "parse-util.h"
#include "path-lookup.h"
#include "path-util.h"
#include "string-table.h"
#include "string-util.h"
#include "strv.h"
+#include "terminal-util.h"
#include "umask-util.h"
#include "user-util.h"
#include "util.h"
_DIRECTORY_TYPE_MAX,
} DirectoryType;
+static bool arg_cat_config = false;
static bool arg_user = false;
static bool arg_create = false;
static bool arg_clean = false;
static bool arg_remove = false;
static bool arg_boot = false;
+static bool arg_no_pager = false;
static char **arg_include_prefixes = NULL;
static char **arg_exclude_prefixes = NULL;
{ 'U', specifier_user_id, NULL },
{ 'u', specifier_user_name, NULL },
{ 'h', specifier_user_home, NULL },
+
{ 't', specifier_directory, UINT_TO_PTR(DIRECTORY_RUNTIME) },
{ 'S', specifier_directory, UINT_TO_PTR(DIRECTORY_STATE) },
{ 'C', specifier_directory, UINT_TO_PTR(DIRECTORY_CACHE) },
{ 'L', specifier_directory, UINT_TO_PTR(DIRECTORY_LOGS) },
+ { 'T', specifier_tmp_dir, NULL },
+ { 'V', specifier_var_tmp_dir, NULL },
{}
};
goto fail;
}
- path_kill_slashes(s);
+ path_simplify(s, false);
r = set_consume(unix_sockets, s);
if (r < 0 && r != -EEXIST) {
static int fd_set_perms(Item *i, int fd, const struct stat *st) {
_cleanup_free_ char *path = NULL;
+ struct stat stbuf;
int r;
assert(i);
if (!i->mode_set && !i->uid_set && !i->gid_set)
goto shortcut;
+ if (!st) {
+ if (fstat(fd, &stbuf) < 0)
+ return log_error_errno(errno, "fstat(%s) failed: %m", path);
+ st = &stbuf;
+ }
+
if (hardlink_vulnerable(st)) {
log_error("Refusing to set permissions on hardlinked file %s while the fs.protected_hardlinks sysctl is turned off.", path);
return -EPERM;
return label_fix(path, 0);
}
+static int path_open_parent_safe(const char *path) {
+ _cleanup_free_ char *dn = NULL;
+ int fd;
+
+ if (path_equal(path, "/") || !path_is_normalized(path)) {
+ log_error("Failed to open parent of '%s': invalid path.", path);
+ return -EINVAL;
+ }
+
+ dn = dirname_malloc(path);
+ if (!dn)
+ return log_oom();
+
+ fd = chase_symlinks(dn, NULL, CHASE_OPEN|CHASE_SAFE, NULL);
+ if (fd == -EPERM)
+ return log_error_errno(fd, "Unsafe symlinks encountered in %s, refusing.", path);
+ if (fd < 0)
+ return log_error_errno(fd, "Failed to validate path %s: %m", path);
+
+ return fd;
+}
+
static int path_set_perms(Item *i, const char *path) {
_cleanup_close_ int fd = -1;
- struct stat st;
assert(i);
assert(path);
fd = open(path, O_NOFOLLOW|O_CLOEXEC|O_PATH);
- if (fd < 0) {
- int level = LOG_ERR, r = -errno;
-
- /* Option "e" operates only on existing objects. Do not
- * print errors about non-existent files or directories */
- if (i->type == EMPTY_DIRECTORY && errno == ENOENT) {
- level = LOG_DEBUG;
- r = 0;
- }
-
- log_full_errno(level, errno, "Adjusting owner and mode for %s failed: %m", path);
- return r;
- }
-
- if (fstat(fd, &st) < 0)
- return log_error_errno(errno, "Failed to fstat() file %s: %m", path);
-
- if (i->type == EMPTY_DIRECTORY && !S_ISDIR(st.st_mode))
- return log_error_errno(EEXIST, "'%s' already exists and is not a directory. ", path);
+ if (fd < 0)
+ return log_error_errno(errno, "Failed to open \"%s\" to adjust permissions: %m", path);
- return fd_set_perms(i, fd, &st);
+ return fd_set_perms(i, fd, NULL);
}
static int parse_xattrs_from_arg(Item *i) {
#if HAVE_ACL
char procfs_path[STRLEN("/proc/self/fd/") + DECIMAL_STR_MAX(int)];
_cleanup_free_ char *path = NULL;
+ struct stat stbuf;
assert(item);
assert(fd);
- assert(st);
r = fd_get_path(fd, &path);
if (r < 0)
return r;
+ if (!st) {
+ if (fstat(fd, &stbuf) < 0)
+ return log_error_errno(errno, "fstat(%s) failed: %m", path);
+ st = &stbuf;
+ }
+
if (hardlink_vulnerable(st)) {
log_error("Refusing to set ACLs on hardlinked file %s while the fs.protected_hardlinks sysctl is turned off.", path);
return -EPERM;
if (item->acl_access)
r = path_set_acl(procfs_path, path, ACL_TYPE_ACCESS, item->acl_access, item->force);
- if (r == 0 && item->acl_default)
+ /* set only default acls to folders */
+ if (r == 0 && item->acl_default && S_ISDIR(st->st_mode))
r = path_set_acl(procfs_path, path, ACL_TYPE_DEFAULT, item->acl_default, item->force);
if (r > 0)
static int path_set_acls(Item *item, const char *path) {
int r = 0;
-#ifdef HAVE_ACL
+#if HAVE_ACL
_cleanup_close_ int fd = -1;
- struct stat st;
assert(item);
assert(path);
if (fd < 0)
return log_error_errno(errno, "Adjusting ACL of %s failed: %m", path);
- if (fstat(fd, &st) < 0)
- return log_error_errno(errno, "Failed to fstat() file %s: %m", path);
-
- r = fd_set_acls(item, fd, &st);
- #endif
- return r;
- }
+ r = fd_set_acls(item, fd, NULL);
+#endif
+ return r;
+}
#define ATTRIBUTES_ALL \
(FS_NOATIME_FL | \
static int fd_set_attribute(Item *item, int fd, const struct stat *st) {
_cleanup_close_ int procfs_fd = -1;
_cleanup_free_ char *path = NULL;
+ struct stat stbuf;
unsigned f;
int r;
if (r < 0)
return r;
+ if (!st) {
+ if (fstat(fd, &stbuf) < 0)
+ return log_error_errno(errno, "fstat(%s) failed: %m", path);
+ st = &stbuf;
+ }
+
/* Issuing the file attribute ioctls on device nodes is not
* safe, as that will be delivered to the drivers, not the
* file system containing the device node. */
static int path_set_attribute(Item *item, const char *path) {
_cleanup_close_ int fd = -1;
- struct stat st;
if (!item->attribute_set || item->attribute_mask == 0)
return 0;
if (fd < 0)
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);
-
- return fd_set_attribute(item, fd, &st);
+ return fd_set_attribute(item, fd, NULL);
}
static int write_one_file(Item *i, const char *path) {
- _cleanup_close_ int fd = -1;
- int flags, r = 0;
- struct stat st;
+ _cleanup_close_ int fd = -1, dir_fd = -1;
+ char *bn;
+ int r;
+
+ assert(i);
+ assert(path);
+ assert(i->argument);
+ assert(i->type == WRITE_FILE);
+
+ /* Validate the path and keep the fd on the directory for opening the
+ * file so we're sure that it can't be changed behind our back. */
+ dir_fd = path_open_parent_safe(path);
+ if (dir_fd < 0)
+ return dir_fd;
+
+ bn = basename(path);
+
+ /* Follows symlinks */
+ fd = openat(dir_fd, bn, O_NONBLOCK|O_CLOEXEC|O_WRONLY|O_NOCTTY, i->mode);
+ if (fd < 0) {
+ if (errno == ENOENT) {
+ log_debug_errno(errno, "Not writing missing file \"%s\": %m", path);
+ return 0;
+ }
+ return log_error_errno(errno, "Failed to open file \"%s\": %m", path);
+ }
+
+ /* 'w' is allowed to write into any kind of files. */
+ log_debug("Writing to \"%s\".", path);
+
+ r = loop_write(fd, i->argument, strlen(i->argument), false);
+ if (r < 0)
+ return log_error_errno(r, "Failed to write file \"%s\": %m", path);
+
+ return fd_set_perms(i, fd, NULL);
+}
+
+static int create_file(Item *i, const char *path) {
+ _cleanup_close_ int fd = -1, dir_fd = -1;
+ struct stat stbuf, *st = NULL;
+ int r = 0;
+ char *bn;
assert(i);
assert(path);
+ assert(i->type == CREATE_FILE);
+
+ /* 'f' operates on regular files exclusively. */
- flags = i->type == CREATE_FILE ? O_CREAT|O_EXCL|O_NOFOLLOW :
- i->type == TRUNCATE_FILE ? O_CREAT|O_TRUNC|O_NOFOLLOW : 0;
+ /* Validate the path and keep the fd on the directory for opening the
+ * file so we're sure that it can't be changed behind our back. */
+ dir_fd = path_open_parent_safe(path);
+ if (dir_fd < 0)
+ return dir_fd;
+
+ bn = basename(path);
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);
+ fd = openat(dir_fd, bn, O_CREAT|O_EXCL|O_NOFOLLOW|O_NONBLOCK|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 missing file \"%s\": %m", path);
- return 0;
+ /* Even on a read-only filesystem, open(2) returns EEXIST if the
+ * file already exists. It returns EROFS only if it needs to
+ * create the file. */
+ if (errno != EEXIST)
+ return log_error_errno(errno, "Failed to create file %s: %m", path);
+
+ /* Re-open the file. At that point it must exist since open(2)
+ * failed with EEXIST. We still need to check if the perms/mode
+ * need to be changed. For read-only filesystems, we let
+ * fd_set_perms() report the error if the perms need to be
+ * modified. */
+ fd = openat(dir_fd, bn, O_NOFOLLOW|O_CLOEXEC|O_PATH, i->mode);
+ if (fd < 0)
+ return log_error_errno(errno, "Failed to re-open file %s: %m", path);
+
+ if (fstat(fd, &stbuf) < 0)
+ return log_error_errno(errno, "stat(%s) failed: %m", path);
+
+ if (!S_ISREG(stbuf.st_mode)) {
+ log_error("%s exists and is not a regular file.", path);
+ return -EEXIST;
}
- if (i->type == CREATE_FILE && errno == EEXIST) {
- log_debug_errno(errno, "Not writing to pre-existing file \"%s\": %m", path);
- goto done;
+
+ st = &stbuf;
+ } else {
+
+ log_debug("\"%s\" has been created.", path);
+
+ if (i->argument) {
+ log_debug("Writing to \"%s\".", path);
+
+ r = loop_write(fd, i->argument, strlen(i->argument), false);
+ if (r < 0)
+ return log_error_errno(r, "Failed to write file \"%s\": %m", path);
}
+ }
- r = -errno;
- if (!i->argument && errno == EROFS && stat(path, &st) == 0 &&
- (i->type == CREATE_FILE || st.st_size == 0))
- goto check_mode;
+ return fd_set_perms(i, fd, st);
+}
+
+static int truncate_file(Item *i, const char *path) {
+ _cleanup_close_ int fd = -1, dir_fd = -1;
+ struct stat stbuf, *st = NULL;
+ bool erofs = false;
+ int r = 0;
+ char *bn;
+
+ assert(i);
+ assert(path);
+ assert(i->type == TRUNCATE_FILE);
+
+ /* We want to operate on regular file exclusively especially since
+ * O_TRUNC is unspecified if the file is neither a regular file nor a
+ * fifo nor a terminal device. Therefore we first open the file and make
+ * sure it's a regular one before truncating it. */
+
+ /* Validate the path and keep the fd on the directory for opening the
+ * file so we're sure that it can't be changed behind our back. */
+ dir_fd = path_open_parent_safe(path);
+ if (dir_fd < 0)
+ return dir_fd;
+
+ bn = basename(path);
+
+ RUN_WITH_UMASK(0000) {
+ mac_selinux_create_file_prepare(path, S_IFREG);
+ fd = openat(dir_fd, bn, O_CREAT|O_NOFOLLOW|O_NONBLOCK|O_CLOEXEC|O_WRONLY|O_NOCTTY, i->mode);
+ mac_selinux_create_file_clear();
+ }
+
+ if (fd < 0) {
+ if (errno != EROFS)
+ return log_error_errno(errno, "Failed to open/create file %s: %m", path);
+
+ /* On a read-only filesystem, we don't want to fail if the
+ * target is already empty and the perms are set. So we still
+ * proceed with the sanity checks and let the remaining
+ * operations fail with EROFS if they try to modify the target
+ * file. */
- return log_error_errno(r, "Failed to create file %s: %m", path);
+ fd = openat(dir_fd, bn, O_NOFOLLOW|O_CLOEXEC|O_PATH, i->mode);
+ if (fd < 0) {
+ if (errno == ENOENT) {
+ log_error("Cannot create file %s on a read-only file system.", path);
+ return -EROFS;
+ }
+
+ return log_error_errno(errno, "Failed to re-open file %s: %m", path);
+ }
+
+ erofs = true;
}
+ if (fstat(fd, &stbuf) < 0)
+ return log_error_errno(errno, "stat(%s) failed: %m", path);
+
+ if (!S_ISREG(stbuf.st_mode)) {
+ log_error("%s exists and is not a regular file.", path);
+ return -EEXIST;
+ }
+
+ if (stbuf.st_size > 0) {
+ if (ftruncate(fd, 0) < 0) {
+ r = erofs ? -EROFS : -errno;
+ return log_error_errno(r, "Failed to truncate file %s: %m", path);
+ }
+ } else
+ st = &stbuf;
+
+ log_debug("\"%s\" has been created.", path);
+
if (i->argument) {
- log_debug("%s to \"%s\".", i->type == CREATE_FILE ? "Appending" : "Writing", path);
+ log_debug("Writing to \"%s\".", path);
r = loop_write(fd, i->argument, strlen(i->argument), false);
- if (r < 0)
- return log_error_errno(r, "Failed to write file \"%s\": %m", path);
+ if (r < 0) {
+ r = erofs ? -EROFS : r;
+ return log_error_errno(r, "Failed to write file %s: %m", path);
+ }
+ }
+
+ return fd_set_perms(i, fd, st);
+}
+
+static int copy_files(Item *i) {
+ _cleanup_close_ int dfd = -1, fd = -1;
+ char *bn;
+ int r;
+
+ log_debug("Copying tree \"%s\" to \"%s\".", i->argument, i->path);
+
+ bn = basename(i->path);
+
+ /* Validate the path and use the returned directory fd for copying the
+ * target so we're sure that the path can't be changed behind our
+ * back. */
+ dfd = path_open_parent_safe(i->path);
+ if (dfd < 0)
+ return dfd;
+
+ r = copy_tree_at(AT_FDCWD, i->argument,
+ dfd, bn,
+ i->uid_set ? i->uid : UID_INVALID,
+ i->gid_set ? i->gid : GID_INVALID,
+ COPY_REFLINK);
+ if (r < 0) {
+ struct stat a, b;
+
+ /* If the target already exists on read-only filesystems, trying
+ * to create the target will not fail with EEXIST but with
+ * EROFS. */
+ if (r == -EROFS && faccessat(dfd, bn, F_OK, AT_SYMLINK_NOFOLLOW) == 0)
+ r = -EEXIST;
+
+ if (r != -EEXIST)
+ return log_error_errno(r, "Failed to copy files to %s: %m", i->path);
+
+ if (stat(i->argument, &a) < 0)
+ return log_error_errno(errno, "stat(%s) failed: %m", i->argument);
+
+ if (fstatat(dfd, bn, &b, AT_SYMLINK_NOFOLLOW) < 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;
+ }
+ }
+
+ fd = openat(dfd, bn, O_NOFOLLOW|O_CLOEXEC|O_PATH);
+ if (fd < 0)
+ return log_error_errno(errno, "Failed to openat(%s): %m", i->path);
+
+ return fd_set_perms(i, fd, NULL);
+}
+
+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_directory_or_subvolume(const char *path, mode_t mode, bool subvol) {
+ _cleanup_close_ int pfd = -1;
+ CreationMode creation;
+ int r;
+
+ assert(path);
+
+ pfd = path_open_parent_safe(path);
+ if (pfd < 0)
+ return pfd;
+
+ if (subvol) {
+ if (btrfs_is_subvol(empty_to_root(arg_root)) <= 0)
+
+ /* Don't create a subvolume unless the root directory is
+ * one, too. We do this under the assumption that if the
+ * root directory is just a plain directory (i.e. very
+ * light-weight), we shouldn't try to split it up into
+ * subvolumes (i.e. more heavy-weight). Thus, chroot()
+ * environments and suchlike will get a full brtfs
+ * subvolume set up below their tree only if they
+ * specifically set up a btrfs subvolume for the root
+ * dir too. */
+
+ subvol = false;
+ else {
+ RUN_WITH_UMASK((~mode) & 0777)
+ r = btrfs_subvol_make_fd(pfd, basename(path));
+ }
} else
- log_debug("\"%s\" has been created.", path);
+ r = 0;
- fd = safe_close(fd);
+ if (!subvol || r == -ENOTTY)
+ RUN_WITH_UMASK(0000)
+ r = mkdirat_label(pfd, basename(path), mode);
- done:
- if (stat(path, &st) < 0)
- return log_error_errno(errno, "stat(%s) failed: %m", path);
+ if (r < 0) {
+ int k;
+
+ if (!IN_SET(r, -EEXIST, -EROFS))
+ return log_error_errno(r, "Failed to create directory or subvolume \"%s\": %m", path);
+
+ k = is_dir_fd(pfd);
+ 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.", path);
+ if (k < 0)
+ return log_error_errno(k, "Failed to check if %s exists: %m", path);
+ if (!k) {
+ log_warning("\"%s\" already exists and is not a directory.", path);
+ return -EEXIST;
+ }
+
+ creation = CREATION_EXISTING;
+ } else
+ creation = CREATION_NORMAL;
- check_mode:
- if (!S_ISREG(st.st_mode)) {
- log_error("%s is not a file.", path);
+ log_debug("%s directory \"%s\".", creation_mode_verb_to_string(creation), path);
+
+ r = openat(pfd, basename(path), O_NOCTTY|O_CLOEXEC|O_DIRECTORY);
+ if (r < 0)
+ return -errno;
+ return r;
+}
+
+static int create_directory(Item *i, const char *path) {
+ _cleanup_close_ int fd = -1;
+
+ assert(i);
+ assert(IN_SET(i->type, CREATE_DIRECTORY, TRUNCATE_DIRECTORY));
+
+ fd = create_directory_or_subvolume(path, i->mode, false);
+ if (fd == -EEXIST)
+ return 0;
+ if (fd < 0)
+ return fd;
+
+ return fd_set_perms(i, fd, NULL);
+}
+
+static int create_subvolume(Item *i, const char *path) {
+ _cleanup_close_ int fd = -1;
+ int r, q = 0;
+
+ assert(i);
+ assert(IN_SET(i->type, CREATE_SUBVOLUME, CREATE_SUBVOLUME_NEW_QUOTA, CREATE_SUBVOLUME_INHERIT_QUOTA));
+
+ fd = create_directory_or_subvolume(path, i->mode, true);
+ if (fd == -EEXIST)
+ return 0;
+ if (fd < 0)
+ return fd;
+
+ if (IN_SET(i->type, CREATE_SUBVOLUME_NEW_QUOTA, CREATE_SUBVOLUME_INHERIT_QUOTA)) {
+ r = btrfs_subvol_auto_qgroup_fd(fd, 0, i->type == CREATE_SUBVOLUME_NEW_QUOTA);
+ if (r == -ENOTTY)
+ log_debug_errno(r, "Couldn't adjust quota for subvolume \"%s\" (unsupported fs or dir not a subvolume): %m", i->path);
+ else if (r == -EROFS)
+ log_debug_errno(r, "Couldn't adjust quota for subvolume \"%s\" (fs is read-only).", i->path);
+ else if (r == -ENOPROTOOPT)
+ log_debug_errno(r, "Couldn't adjust quota for subvolume \"%s\" (quota support is disabled).", i->path);
+ else if (r < 0)
+ q = log_error_errno(r, "Failed to adjust quota for subvolume \"%s\": %m", i->path);
+ else if (r > 0)
+ log_debug("Adjusted quota for subvolume \"%s\".", i->path);
+ else if (r == 0)
+ log_debug("Quota for subvolume \"%s\" already in place, no change made.", i->path);
+ }
+
+ r = fd_set_perms(i, fd, NULL);
+ if (q < 0)
+ return q;
+
+ return r;
+}
+
+static int empty_directory(Item *i, const char *path) {
+ int r;
+
+ assert(i);
+ assert(i->type == EMPTY_DIRECTORY);
+
+ r = is_dir(path, false);
+ if (r == -ENOENT) {
+ /* Option "e" operates only on existing objects. Do not
+ * print errors about non-existent files or directories */
+ log_debug("Skipping missing directory: %s", path);
+ return 0;
+ }
+ if (r < 0)
+ return log_error_errno(r, "is_dir() failed on path %s: %m", path);
+ if (r == 0) {
+ log_error("'%s' already exists and is not a directory.", path);
return -EEXIST;
}
- r = path_set_perms(i, path);
- if (r < 0)
- return r;
+ return path_set_perms(i, path);
+}
- return 0;
+static int create_device(Item *i, mode_t file_type) {
+ _cleanup_close_ int dfd = -1, fd = -1;
+ CreationMode creation;
+ char *bn;
+ int r;
+
+ assert(i);
+ assert(IN_SET(file_type, S_IFBLK, S_IFCHR));
+
+ bn = basename(i->path);
+
+ /* Validate the path and use the returned directory fd for copying the
+ * target so we're sure that the path can't be changed behind our
+ * back. */
+ dfd = path_open_parent_safe(i->path);
+ if (dfd < 0)
+ return dfd;
+
+ RUN_WITH_UMASK(0000) {
+ mac_selinux_create_file_prepare(i->path, file_type);
+ r = mknodat(dfd, bn, i->mode | file_type, i->major_minor);
+ mac_selinux_create_file_clear();
+ }
+
+ if (r < 0) {
+ struct stat st;
+
+ 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 (fstatat(dfd, bn, &st, 0) < 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);
+ /* FIXME: need to introduce mknodat_atomic() */
+ 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));
+
+ fd = openat(dfd, bn, O_NOFOLLOW|O_CLOEXEC|O_PATH);
+ if (fd < 0)
+ return log_error_errno(errno, "Failed to openat(%s): %m", i->path);
+
+ return fd_set_perms(i, fd, NULL);
+}
+
+static int create_fifo(Item *i, const char *path) {
+ CreationMode creation;
+ struct stat st;
+ int r;
+
+ RUN_WITH_UMASK(0000) {
+ mac_selinux_create_file_prepare(path, S_IFIFO);
+ r = mkfifo(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", path);
+
+ if (lstat(path, &st) < 0)
+ return log_error_errno(errno, "stat(%s) failed: %m", path);
+
+ if (!S_ISFIFO(st.st_mode)) {
+
+ if (i->force) {
+ RUN_WITH_UMASK(0000) {
+ mac_selinux_create_file_prepare(path, S_IFIFO);
+ r = mkfifo_atomic(path, i->mode);
+ mac_selinux_create_file_clear();
+ }
+
+ if (r < 0)
+ return log_error_errno(r, "Failed to create fifo %s: %m", path);
+ creation = CREATION_FORCE;
+ } else {
+ log_warning("\"%s\" already exists and is not a fifo.", path);
+ return 0;
+ }
+ } else
+ creation = CREATION_EXISTING;
+ } else
+ creation = CREATION_NORMAL;
+ log_debug("%s fifo \"%s\".", creation_mode_verb_to_string(creation), path);
+
+ return path_set_perms(i, path);
}
typedef int (*action_t)(Item *, const char *);
typedef int (*fdaction_t)(Item *, int fd, const struct stat *st);
-static int item_do(Item *i, int fd, const struct stat *st, fdaction_t action) {
+static int item_do(Item *i, int fd, fdaction_t action) {
+ struct stat st;
int r = 0, q;
assert(i);
assert(fd >= 0);
- assert(st);
+
+ if (fstat(fd, &st) < 0) {
+ r = -errno;
+ goto finish;
+ }
/* This returns the first error we run into, but nevertheless
* tries to go on */
- r = action(i, fd, st);
+ r = action(i, fd, &st);
- if (S_ISDIR(st->st_mode)) {
- char procfs_path[strlen("/proc/self/fd/") + DECIMAL_STR_MAX(int)];
+ if (S_ISDIR(st.st_mode)) {
+ char procfs_path[STRLEN("/proc/self/fd/") + DECIMAL_STR_MAX(int)];
_cleanup_closedir_ DIR *d = NULL;
struct dirent *de;
}
FOREACH_DIRENT_ALL(de, d, q = -errno; goto finish) {
- struct stat de_st;
int de_fd;
if (dot_or_dot_dot(de->d_name))
continue;
de_fd = openat(fd, de->d_name, O_NOFOLLOW|O_CLOEXEC|O_PATH);
- if (de_fd >= 0 && fstat(de_fd, &de_st) >= 0)
+ if (de_fd >= 0)
/* pass ownership of dirent fd over */
- q = item_do(i, de_fd, &de_st, action);
+ q = item_do(i, de_fd, action);
else
q = -errno;
STRV_FOREACH(fn, g.gl_pathv) {
_cleanup_close_ int fd = -1;
- struct stat st;
/* Make sure we won't trigger/follow file object (such as
* device nodes, automounts, ...) pointed out by 'fn' with
continue;
}
- if (fstat(fd, &st) < 0) {
- r = r ?: -errno;
- continue;
- }
-
- k = item_do(i, fd, &st, action);
+ k = item_do(i, fd, 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) {
- struct stat st;
- int r = 0;
- int q = 0;
CreationMode creation;
+ int r = 0;
assert(i);
return 0;
case CREATE_FILE:
- case TRUNCATE_FILE:
RUN_WITH_UMASK(0000)
(void) mkdir_parents_label(i->path, 0755);
- r = write_one_file(i, i->path);
+ r = create_file(i, i->path);
if (r < 0)
return r;
break;
- case COPY_FILES:
+ case TRUNCATE_FILE:
RUN_WITH_UMASK(0000)
(void) mkdir_parents_label(i->path, 0755);
- log_debug("Copying tree \"%s\" to \"%s\".", i->argument, i->path);
- r = copy_tree(i->argument, i->path,
- i->uid_set ? i->uid : UID_INVALID,
- i->gid_set ? i->gid : GID_INVALID,
- COPY_REFLINK);
-
- 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(i->argument, &a) < 0)
- return log_error_errno(errno, "stat(%s) failed: %m", i->argument);
-
- if (stat(i->path, &b) < 0)
- return log_error_errno(errno, "stat(%s) failed: %m", i->path);
+ r = truncate_file(i, i->path);
+ if (r < 0)
+ return r;
+ break;
- 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;
- }
- }
+ case COPY_FILES:
+ RUN_WITH_UMASK(0000)
+ (void) mkdir_parents_label(i->path, 0755);
- r = path_set_perms(i, i->path);
+ r = copy_files(i);
if (r < 0)
return r;
-
break;
case WRITE_FILE:
case CREATE_DIRECTORY:
case TRUNCATE_DIRECTORY:
+ RUN_WITH_UMASK(0000)
+ (void) mkdir_parents_label(i->path, 0755);
+
+ r = create_directory(i, i->path);
+ if (r < 0)
+ return r;
+ break;
+
case CREATE_SUBVOLUME:
case CREATE_SUBVOLUME_INHERIT_QUOTA:
case CREATE_SUBVOLUME_NEW_QUOTA:
RUN_WITH_UMASK(0000)
(void) mkdir_parents_label(i->path, 0755);
- if (IN_SET(i->type, CREATE_SUBVOLUME, CREATE_SUBVOLUME_INHERIT_QUOTA, CREATE_SUBVOLUME_NEW_QUOTA)) {
-
- if (btrfs_is_subvol(isempty(arg_root) ? "/" : arg_root) <= 0)
-
- /* Don't create a subvolume unless the
- * root directory is one, too. We do
- * this under the assumption that if
- * the root directory is just a plain
- * directory (i.e. very light-weight),
- * we shouldn't try to split it up
- * into subvolumes (i.e. more
- * heavy-weight). Thus, chroot()
- * environments and suchlike will get
- * a full brtfs subvolume set up below
- * their tree only if they
- * specifically set up a btrfs
- * subvolume for the root dir too. */
-
- r = -ENOTTY;
- else {
- 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 (!IN_SET(r, -EEXIST, -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\" (unsupported fs or dir not a subvolume): %m", i->path);
- else if (r == -EROFS)
- log_debug_errno(r, "Couldn't adjust quota for subvolume \"%s\" (fs is read-only).", i->path);
- else if (r == -ENOPROTOOPT)
- log_debug_errno(r, "Couldn't adjust quota for subvolume \"%s\" (quota support is disabled).", i->path);
- else if (r < 0)
- q = log_error_errno(r, "Failed to adjust quota for subvolume \"%s\": %m", i->path);
- else if (r > 0)
- log_debug("Adjusted quota for subvolume \"%s\".", i->path);
- else if (r == 0)
- log_debug("Quota for subvolume \"%s\" already in place, no change made.", i->path);
- }
+ r = create_subvolume(i, i->path);
+ if (r < 0)
+ return r;
+ break;
- _fallthrough_;
case EMPTY_DIRECTORY:
- r = glob_item(i, path_set_perms);
- if (q < 0)
- return q;
+ r = glob_item(i, empty_directory);
if (r < 0)
return r;
-
break;
case CREATE_FIFO:
- RUN_WITH_UMASK(0000) {
+ RUN_WITH_UMASK(0000)
(void) mkdir_parents_label(i->path, 0755);
- 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);
+ r = create_fifo(i, i->path);
if (r < 0)
return r;
-
break;
case CREATE_SYMLINK: {
}
case CREATE_BLOCK_DEVICE:
- case CREATE_CHAR_DEVICE: {
- mode_t file_type;
-
+ case CREATE_CHAR_DEVICE:
if (have_effective_cap(CAP_MKNOD) == 0) {
/* In a container we lack CAP_MKNOD. We
shouldn't attempt to create the device node in
RUN_WITH_UMASK(0000)
(void) mkdir_parents_label(i->path, 0755);
- 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);
+ r = create_device(i, i->type == CREATE_BLOCK_DEVICE ? S_IFBLK : S_IFCHR);
if (r < 0)
return r;
break;
- }
case ADJUST_MODE:
case RELABEL_PATH:
return 0;
}
+static int patch_var_run(const char *fname, unsigned line, char **path) {
+ const char *k;
+ char *n;
+
+ assert(path);
+ assert(*path);
+
+ /* Optionally rewrites lines referencing /var/run/, to use /run/ instead. Why bother? tmpfiles merges lines in
+ * some cases and detects conflicts in others. If files/directories are specified through two equivalent lines
+ * this is problematic as neither case will be detected. Ideally we'd detect these cases by resolving symlinks
+ * early, but that's precisely not what we can do here as this code very likely is running very early on, at a
+ * time where the paths in question are not available yet, or even more importantly, our own tmpfiles rules
+ * might create the paths that are intermediary to the listed paths. We can't really cover the generic case,
+ * but the least we can do is cover the specific case of /var/run vs. /run, as /var/run is a legacy name for
+ * /run only, and we explicitly document that and require that on systemd systems the former is a symlink to
+ * the latter. Moreover files below this path are by far the primary usecase for tmpfiles.d/. */
+
+ k = path_startswith(*path, "/var/run/");
+ if (isempty(k)) /* Don't complain about other paths than /var/run, and not about /var/run itself either. */
+ return 0;
+
+ n = strjoin("/run/", k);
+ if (!n)
+ return log_oom();
+
+ /* Also log about this briefly. We do so at LOG_NOTICE level, as we fixed up the situation automatically, hence
+ * there's no immediate need for action by the user. However, in the interest of making things less confusing
+ * to the user, let's still inform the user that these snippets should really be updated. */
+
+ log_notice("[%s:%u] Line references path below legacy directory /var/run/, updating %s → %s; please update the tmpfiles.d/ drop-in file accordingly.", fname, line, *path, n);
+
+ free(*path);
+ *path = n;
+
+ return 0;
+}
+
static int parse_line(const char *fname, unsigned line, const char *buffer, bool *invalid_config) {
_cleanup_free_ char *action = NULL, *mode = NULL, *user = NULL, *group = NULL, *age = NULL, *path = NULL;
/* invalid quoting and such or an unknown specifier */
*invalid_config = true;
return log_error_errno(r, "[%s:%u] Failed to parse line: %m", fname, line);
- }
-
- else if (r < 2) {
+ } else if (r < 2) {
*invalid_config = true;
log_error("[%s:%u] Syntax error.", fname, line);
return -EIO;
return log_error_errno(r, "[%s:%u] Failed to replace specifiers: %s", fname, line, path);
}
+ r = patch_var_run(fname, line, &i.path);
+ if (r < 0)
+ return r;
+
switch (i.type) {
case CREATE_DIRECTORY:
return -EBADMSG;
}
- path_kill_slashes(i.argument);
+ path_simplify(i.argument, false);
break;
case CREATE_CHAR_DEVICE:
return -EBADMSG;
}
- path_kill_slashes(i.path);
+ path_simplify(i.path, false);
if (!should_include_path(i.path))
return 0;
return 0;
}
+static int cat_config(char **config_dirs, char **args) {
+ _cleanup_strv_free_ char **files = NULL;
+ int r;
+
+ r = conf_files_list_with_replacement(arg_root, config_dirs, arg_replace, &files, NULL);
+ if (r < 0)
+ return r;
+
+ return cat_files(NULL, files, 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"
" --user Execute user configuration\n"
" --version Show package version\n"
+ " --cat-config Show configuration files\n"
" --create Create marked files/directories\n"
" --clean Clean up marked directories\n"
" --remove Remove marked files/directories\n"
" --exclude-prefix=PATH Ignore rules with the specified prefix\n"
" --root=PATH Operate on an alternate filesystem root\n"
" --replace=PATH Treat arguments as replacement for PATH\n"
+ " --no-pager Do not pipe output into a pager\n"
, program_invocation_short_name);
}
enum {
ARG_VERSION = 0x100,
+ ARG_CAT_CONFIG,
ARG_USER,
ARG_CREATE,
ARG_CLEAN,
ARG_EXCLUDE_PREFIX,
ARG_ROOT,
ARG_REPLACE,
+ ARG_NO_PAGER,
};
static const struct option options[] = {
{ "help", no_argument, NULL, 'h' },
{ "user", no_argument, NULL, ARG_USER },
{ "version", no_argument, NULL, ARG_VERSION },
+ { "cat-config", no_argument, NULL, ARG_CAT_CONFIG },
{ "create", no_argument, NULL, ARG_CREATE },
{ "clean", no_argument, NULL, ARG_CLEAN },
{ "remove", no_argument, NULL, ARG_REMOVE },
{ "exclude-prefix", required_argument, NULL, ARG_EXCLUDE_PREFIX },
{ "root", required_argument, NULL, ARG_ROOT },
{ "replace", required_argument, NULL, ARG_REPLACE },
+ { "no-pager", no_argument, NULL, ARG_NO_PAGER },
{}
};
case ARG_VERSION:
return version();
+ case ARG_CAT_CONFIG:
+ arg_cat_config = true;
+ break;
+
case ARG_USER:
arg_user = true;
break;
arg_replace = optarg;
break;
+ case ARG_NO_PAGER:
+ arg_no_pager = true;
+ break;
+
case '?':
return -EINVAL;
assert_not_reached("Unhandled option");
}
- if (!arg_clean && !arg_create && !arg_remove) {
+ if (!arg_clean && !arg_create && !arg_remove && !arg_cat_config) {
log_error("You need to specify at least one of --clean, --create or --remove.");
return -EINVAL;
}
+ if (arg_replace && arg_cat_config) {
+ log_error("Option --replace= is not supported with --cat-config");
+ return -EINVAL;
+ }
+
if (arg_replace && optind >= argc) {
log_error("When --replace= is given, some configuration items must be specified");
return -EINVAL;
char **f;
int r;
- r = conf_files_list_strv(&files, ".conf", arg_root, 0, (const char* const*) config_dirs);
+ r = conf_files_list_with_replacement(arg_root, config_dirs, arg_replace, &files, &p);
if (r < 0)
- return log_error_errno(r, "Failed to enumerate tmpfiles.d files: %m");
-
- if (arg_replace) {
- r = conf_files_insert(&files, arg_root, config_dirs, arg_replace);
- if (r < 0)
- return log_error_errno(r, "Failed to extend tmpfiles.d file list: %m");
-
- p = path_join(arg_root, arg_replace, NULL);
- if (!p)
- return log_oom();
- }
+ return r;
STRV_FOREACH(f, files)
if (p && path_equal(*f, p)) {
log_parse_environment();
log_open();
- umask(0022);
-
- mac_selinux_init();
-
- 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 (arg_user) {
r = user_config_paths(&config_dirs);
if (r < 0) {
log_debug("Looking for configuration files in (higher priority first):\n\t%s", t);
}
+ if (arg_cat_config) {
+ (void) pager_open(arg_no_pager, false);
+
+ r = cat_config(config_dirs, argv + optind);
+ goto finish;
+ }
+
+ umask(0022);
+
+ mac_selinux_init();
+
+ items = ordered_hashmap_new(&string_hash_ops);
+ globs = ordered_hashmap_new(&string_hash_ops);
+
+ if (!items || !globs) {
+ r = log_oom();
+ goto finish;
+ }
+
/* If command line arguments are specified along with --replace, read all
* configuration files and insert the positional arguments at the specified
* place. Otherwise, if command line arguments are specified, execute just
}
finish:
+ pager_close();
+
ordered_hashmap_free_with_destructor(items, item_array_free);
ordered_hashmap_free_with_destructor(globs, item_array_free);
projects / thirdparty / systemd.git / blobdiff