+/* SPDX-License-Identifier: LGPL-2.1+ */
/***
This file is part of systemd.
#define UNIT_FILE_FOLLOW_SYMLINK_MAX 64
typedef enum SearchFlags {
- SEARCH_LOAD = 1,
- SEARCH_FOLLOW_CONFIG_SYMLINKS = 2,
+ SEARCH_LOAD = 1U << 0,
+ SEARCH_FOLLOW_CONFIG_SYMLINKS = 1U << 1,
+ SEARCH_DROPIN = 1U << 2,
} SearchFlags;
typedef struct {
size_t n_rules;
} Presets;
+static inline bool unit_file_install_info_has_rules(UnitFileInstallInfo *i) {
+ assert(i);
+
+ return !strv_isempty(i->aliases) ||
+ !strv_isempty(i->wanted_by) ||
+ !strv_isempty(i->required_by);
+}
+
+static inline bool unit_file_install_info_has_also(UnitFileInstallInfo *i) {
+ assert(i);
+
+ return !strv_isempty(i->also);
+}
+
static inline void presets_freep(Presets *p) {
size_t i;
if (path_startswith(rpath, "/usr"))
return true;
-#ifdef HAVE_SPLIT_USR
+#if HAVE_SPLIT_USR
if (path_startswith(rpath, "/lib"))
return true;
#endif
if (!changes)
return 0;
- c = realloc(*changes, (*n_changes + 1) * sizeof(UnitFileChange));
+ c = reallocarray(*changes, *n_changes + 1, sizeof(UnitFileChange));
if (!c)
return -ENOMEM;
*changes = c;
assert(p);
- r = set_ensure_allocated(remove_symlinks_to, &string_hash_ops);
+ r = set_ensure_allocated(remove_symlinks_to, &path_hash_ops);
if (r < 0)
return r;
return r;
}
+static bool is_symlink_with_known_name(const UnitFileInstallInfo *i, const char *name) {
+ int r;
+
+ if (streq(name, i->name))
+ return true;
+
+ if (strv_contains(i->aliases, name))
+ return true;
+
+ /* Look for template symlink matching DefaultInstance */
+ if (i->default_instance && unit_name_is_valid(i->name, UNIT_NAME_TEMPLATE)) {
+ _cleanup_free_ char *s = NULL;
+
+ r = unit_name_replace_instance(i->name, i->default_instance, &s);
+ if (r < 0) {
+ if (r != -EINVAL)
+ return r;
+
+ } else if (streq(name, s))
+ return true;
+ }
+
+ return false;
+}
+
static int find_symlinks_fd(
const char *root_dir,
- const char *name,
+ UnitFileInstallInfo *i,
+ bool match_aliases,
int fd,
const char *path,
const char *config_path,
struct dirent *de;
int r = 0;
- assert(name);
+ assert(i);
assert(fd >= 0);
assert(path);
assert(config_path);
}
/* This will close nfd, regardless whether it succeeds or not */
- q = find_symlinks_fd(root_dir, name, nfd, p, config_path, same_name_link);
+ q = find_symlinks_fd(root_dir, i, match_aliases, nfd,
+ p, config_path, same_name_link);
if (q > 0)
return 1;
if (r == 0)
/* Check if the symlink itself matches what we
* are looking for */
- if (path_is_absolute(name))
- found_path = path_equal(p, name);
+ if (path_is_absolute(i->name))
+ found_path = path_equal(p, i->name);
else
- found_path = streq(de->d_name, name);
+ found_path = streq(de->d_name, i->name);
/* Check if what the symlink points to
* matches what we are looking for */
- if (path_is_absolute(name))
- found_dest = path_equal(dest, name);
+ if (path_is_absolute(i->name))
+ found_dest = path_equal(dest, i->name);
else
- found_dest = streq(basename(dest), name);
+ found_dest = streq(basename(dest), i->name);
if (found_path && found_dest) {
_cleanup_free_ char *t = NULL;
/* Filter out same name links in the main
* config path */
- t = path_make_absolute(name, config_path);
+ t = path_make_absolute(i->name, config_path);
if (!t)
return -ENOMEM;
if (b)
*same_name_link = true;
- else if (found_path || found_dest)
- return 1;
+ else if (found_path || found_dest) {
+ if (!match_aliases)
+ return 1;
+
+ /* Check if symlink name is in the set of names used by [Install] */
+ q = is_symlink_with_known_name(i, de->d_name);
+ if (q < 0)
+ return q;
+ if (q > 0)
+ return 1;
+ }
}
}
static int find_symlinks(
const char *root_dir,
- const char *name,
+ UnitFileInstallInfo *i,
+ bool match_name,
const char *config_path,
bool *same_name_link) {
int fd;
- assert(name);
+ assert(i);
assert(config_path);
assert(same_name_link);
}
/* This takes possession of fd and closes it */
- return find_symlinks_fd(root_dir, name, fd, config_path, config_path, same_name_link);
+ return find_symlinks_fd(root_dir, i, match_name, fd,
+ config_path, config_path, same_name_link);
}
static int find_symlinks_in_scope(
+ UnitFileScope scope,
const LookupPaths *paths,
- const char *name,
+ UnitFileInstallInfo *i,
+ bool match_name,
UnitFileState *state) {
bool same_name_link_runtime = false, same_name_link_config = false;
int r;
assert(paths);
- assert(name);
+ assert(i);
STRV_FOREACH(p, paths->search_path) {
bool same_name_link = false;
- r = find_symlinks(paths->root_dir, name, *p, &same_name_link);
+ r = find_symlinks(paths->root_dir, i, match_name, *p, &same_name_link);
if (r < 0)
return r;
if (r > 0) {
return 1;
}
+ /* look for globally enablement of user units */
+ if (scope == UNIT_FILE_USER && path_is_user_config_dir(*p)) {
+ *state = UNIT_FILE_ENABLED;
+ return 1;
+ }
+
r = path_is_runtime(paths, *p, false);
if (r < 0)
return r;
* outside of runtime and configuration directory, then we consider it statically enabled. Note we do that only
* for instance, not for regular names, as those are merely aliases, while instances explicitly instantiate
* something, and hence are a much stronger concept. */
- if (enabled_at_all && unit_name_is_valid(name, UNIT_NAME_INSTANCE)) {
+ if (enabled_at_all && unit_name_is_valid(i->name, UNIT_NAME_INSTANCE)) {
*state = UNIT_FILE_STATIC;
return 1;
}
free(i);
}
-static OrderedHashmap* install_info_hashmap_free(OrderedHashmap *m) {
- UnitFileInstallInfo *i;
-
- if (!m)
- return NULL;
-
- while ((i = ordered_hashmap_steal_first(m)))
- install_info_free(i);
-
- return ordered_hashmap_free(m);
-}
-
static void install_context_done(InstallContext *c) {
assert(c);
- c->will_process = install_info_hashmap_free(c->will_process);
- c->have_processed = install_info_hashmap_free(c->have_processed);
+ c->will_process = ordered_hashmap_free_with_destructor(c->will_process, install_info_free);
+ c->have_processed = ordered_hashmap_free_with_destructor(c->have_processed, install_info_free);
}
static UnitFileInstallInfo *install_info_find(InstallContext *c, const char *name) {
void *data,
void *userdata) {
- const char *name;
UnitType type;
+ assert(unit);
assert(filename);
assert(lvalue);
assert(rvalue);
- name = basename(filename);
- type = unit_name_to_type(name);
+ type = unit_name_to_type(unit);
if (!unit_type_may_alias(type))
return log_syntax(unit, LOG_WARNING, filename, line, 0,
"Alias= is not allowed for %s units, ignoring.",
InstallContext *c = data;
int r;
+ assert(unit);
assert(filename);
assert(lvalue);
assert(rvalue);
void *userdata) {
UnitFileInstallInfo *i = data;
- const char *name;
_cleanup_free_ char *printed = NULL;
int r;
+ assert(unit);
assert(filename);
assert(lvalue);
assert(rvalue);
- name = basename(filename);
- if (unit_name_is_valid(name, UNIT_NAME_INSTANCE))
+ if (unit_name_is_valid(unit, UNIT_NAME_INSTANCE))
/* When enabling an instance, we might be using a template unit file,
* but we should ignore DefaultInstance silently. */
return 0;
- if (!unit_name_is_valid(name, UNIT_NAME_TEMPLATE))
+ if (!unit_name_is_valid(unit, UNIT_NAME_TEMPLATE))
return log_syntax(unit, LOG_WARNING, filename, line, 0,
"DefaultInstance= only makes sense for template units, ignoring.");
InstallContext *c,
UnitFileInstallInfo *info,
const char *path,
+ const char *root_dir,
SearchFlags flags) {
const ConfigTableItem items[] = {
{}
};
- const char *name;
UnitType type;
_cleanup_fclose_ FILE *f = NULL;
_cleanup_close_ int fd = -1;
assert(info);
assert(path);
- name = basename(path);
- type = unit_name_to_type(name);
- if (unit_name_is_valid(name, UNIT_NAME_TEMPLATE|UNIT_NAME_INSTANCE) &&
- !unit_type_may_template(type))
- return log_error_errno(EINVAL, "Unit type %s cannot be templated.", unit_type_to_string(type));
+ if (!(flags & SEARCH_DROPIN)) {
+ /* Loading or checking for the main unit file… */
- if (!(flags & SEARCH_LOAD)) {
- r = lstat(path, &st);
- if (r < 0)
+ type = unit_name_to_type(info->name);
+ if (type < 0)
+ return -EINVAL;
+ if (unit_name_is_valid(info->name, UNIT_NAME_TEMPLATE|UNIT_NAME_INSTANCE) && !unit_type_may_template(type)) {
+ log_error("Unit type %s cannot be templated.", unit_type_to_string(type));
+ return -EINVAL;
+ }
+
+ if (!(flags & SEARCH_LOAD)) {
+ r = lstat(path, &st);
+ if (r < 0)
+ return -errno;
+
+ if (null_or_empty(&st))
+ info->type = UNIT_FILE_TYPE_MASKED;
+ else if (S_ISREG(st.st_mode))
+ info->type = UNIT_FILE_TYPE_REGULAR;
+ else if (S_ISLNK(st.st_mode))
+ return -ELOOP;
+ else if (S_ISDIR(st.st_mode))
+ return -EISDIR;
+ else
+ return -ENOTTY;
+
+ return 0;
+ }
+
+ fd = open(path, O_RDONLY|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW);
+ if (fd < 0)
return -errno;
+ } else {
+ /* Operating on a drop-in file. If we aren't supposed to load the unit file drop-ins don't matter, let's hence shortcut this. */
- if (null_or_empty(&st))
- info->type = UNIT_FILE_TYPE_MASKED;
- else if (S_ISREG(st.st_mode))
- info->type = UNIT_FILE_TYPE_REGULAR;
- else if (S_ISLNK(st.st_mode))
- return -ELOOP;
- else if (S_ISDIR(st.st_mode))
- return -EISDIR;
- else
- return -ENOTTY;
+ if (!(flags & SEARCH_LOAD))
+ return 0;
- return 0;
+ fd = chase_symlinks_and_open(path, root_dir, 0, O_RDONLY|O_CLOEXEC|O_NOCTTY, NULL);
+ if (fd < 0)
+ return fd;
}
- /* c is only needed if we actually load the file */
- assert(c);
-
- fd = open(path, O_RDONLY|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW);
- if (fd < 0)
- return -errno;
if (fstat(fd, &st) < 0)
return -errno;
+
if (null_or_empty(&st)) {
- info->type = UNIT_FILE_TYPE_MASKED;
+ if ((flags & SEARCH_DROPIN) == 0)
+ info->type = UNIT_FILE_TYPE_MASKED;
+
return 0;
}
- if (S_ISDIR(st.st_mode))
- return -EISDIR;
- if (!S_ISREG(st.st_mode))
- return -ENOTTY;
+
+ r = stat_verify_regular(&st);
+ if (r < 0)
+ return r;
f = fdopen(fd, "re");
if (!f)
return -errno;
fd = -1;
- r = config_parse(NULL, path, f,
+ /* c is only needed if we actually load the file (it's referenced from items[] btw, in case you wonder.) */
+ assert(c);
+
+ r = config_parse(info->name, path, f,
NULL,
config_item_table_lookup, items,
- true, true, false, info);
+ CONFIG_PARSE_RELAXED|CONFIG_PARSE_ALLOW_INCLUDE, info);
if (r < 0)
return log_debug_errno(r, "Failed to parse %s: %m", info->name);
- info->type = UNIT_FILE_TYPE_REGULAR;
+ if ((flags & SEARCH_DROPIN) == 0)
+ info->type = UNIT_FILE_TYPE_REGULAR;
return
(int) strv_length(info->aliases) +
_cleanup_free_ char *target = NULL;
int r;
- r = unit_file_load(c, info, path, flags);
- if (r != -ELOOP)
+ r = unit_file_load(c, info, path, root_dir, flags);
+ if (r != -ELOOP || (flags & SEARCH_DROPIN))
return r;
/* This is a symlink, let's read it. */
const LookupPaths *paths,
SearchFlags flags) {
+ const char *dropin_dir_name = NULL, *dropin_template_dir_name = NULL;
+ _cleanup_strv_free_ char **dirs = NULL, **files = NULL;
_cleanup_free_ char *template = NULL;
+ bool found_unit = false;
+ int r, result;
char **p;
- int r;
assert(info);
assert(paths);
assert(info->name);
+ if (unit_name_is_valid(info->name, UNIT_NAME_INSTANCE)) {
+ r = unit_name_template(info->name, &template);
+ if (r < 0)
+ return r;
+ }
+
STRV_FOREACH(p, paths->search_path) {
_cleanup_free_ char *path = NULL;
r = unit_file_load_or_readlink(c, info, path, paths->root_dir, flags);
if (r >= 0) {
- info->path = path;
- path = NULL;
- return r;
+ info->path = TAKE_PTR(path);
+ result = r;
+ found_unit = true;
+ break;
} else if (!IN_SET(r, -ENOENT, -ENOTDIR, -EACCES))
return r;
}
- if (unit_name_is_valid(info->name, UNIT_NAME_INSTANCE)) {
+ if (!found_unit && template) {
+
/* Unit file doesn't exist, however instance
* enablement was requested. We will check if it is
* possible to load template unit file. */
- r = unit_name_template(info->name, &template);
- if (r < 0)
- return r;
-
STRV_FOREACH(p, paths->search_path) {
_cleanup_free_ char *path = NULL;
r = unit_file_load_or_readlink(c, info, path, paths->root_dir, flags);
if (r >= 0) {
- info->path = path;
- path = NULL;
- return r;
+ info->path = TAKE_PTR(path);
+ result = r;
+ found_unit = true;
+ break;
} else if (!IN_SET(r, -ENOENT, -ENOTDIR, -EACCES))
return r;
}
}
- log_debug("Cannot find unit %s%s%s.", info->name, template ? " or " : "", strempty(template));
- return -ENOENT;
+ if (!found_unit) {
+ log_debug("Cannot find unit %s%s%s.", info->name, template ? " or " : "", strempty(template));
+ return -ENOENT;
+ }
+
+ if (info->type == UNIT_FILE_TYPE_MASKED)
+ return result;
+
+ /* Search for drop-in directories */
+
+ dropin_dir_name = strjoina(info->name, ".d");
+ STRV_FOREACH(p, paths->search_path) {
+ char *path;
+
+ path = path_join(NULL, *p, dropin_dir_name);
+ if (!path)
+ return -ENOMEM;
+
+ r = strv_consume(&dirs, path);
+ if (r < 0)
+ return r;
+ }
+
+ if (template) {
+ dropin_template_dir_name = strjoina(template, ".d");
+ STRV_FOREACH(p, paths->search_path) {
+ char *path;
+
+ path = path_join(NULL, *p, dropin_template_dir_name);
+ if (!path)
+ return -ENOMEM;
+
+ r = strv_consume(&dirs, path);
+ if (r < 0)
+ return r;
+ }
+ }
+
+ /* Load drop-in conf files */
+
+ r = conf_files_list_strv(&files, ".conf", NULL, 0, (const char**) dirs);
+ if (r < 0)
+ return log_debug_errno(r, "Failed to get list of conf files: %m");
+
+ STRV_FOREACH(p, files) {
+ r = unit_file_load_or_readlink(c, info, *p, paths->root_dir, flags | SEARCH_DROPIN);
+ if (r < 0)
+ return log_debug_errno(r, "Failed to load conf file %s: %m", *p);
+ }
+
+ return result;
}
static int install_info_follow(
if (r < 0)
return r;
- path = instance.path;
- instance.path = NULL;
+ path = TAKE_PTR(instance.path);
if (instance.type == UNIT_FILE_TYPE_MASKED) {
unit_file_changes_add(changes, n_changes, -ERFKILL, path, NULL);
if (lstat(full, &st) < 0)
return -errno;
- if (S_ISLNK(st.st_mode))
- return -ELOOP;
- if (S_ISDIR(st.st_mode))
- return -EISDIR;
- if (!S_ISREG(st.st_mode))
- return -ENOTTY;
+ r = stat_verify_regular(&st);
+ if (r < 0)
+ return r;
q = in_search_path(&paths, *i);
if (q < 0)
if (!GREEDY_REALLOC0(todo, n_allocated, n_todo + 2))
return -ENOMEM;
- todo[n_todo++] = dropin;
- dropin = NULL;
+ todo[n_todo++] = TAKE_PTR(dropin);
}
}
}
if (!GREEDY_REALLOC0(todo, n_allocated, n_todo + 2))
return -ENOMEM;
- todo[n_todo++] = path;
- path = NULL;
+ todo[n_todo++] = TAKE_PTR(path);
}
}
}
break;
}
- r = find_symlinks_in_scope(paths, i->name, &state);
+ /* Check if any of the Alias= symlinks have been created.
+ * We ignore other aliases, and only check those that would
+ * be created by systemctl enable for this unit. */
+ r = find_symlinks_in_scope(scope, paths, i, true, &state);
+ if (r < 0)
+ return r;
+ if (r > 0)
+ break;
+
+ /* Check if the file is known under other names. If it is,
+ * it might be in use. Report that as UNIT_FILE_INDIRECT. */
+ r = find_symlinks_in_scope(scope, paths, i, false, &state);
if (r < 0)
return r;
- if (r == 0) {
- if (UNIT_FILE_INSTALL_INFO_HAS_RULES(i))
+ if (r > 0)
+ state = UNIT_FILE_INDIRECT;
+ else {
+ if (unit_file_install_info_has_rules(i))
state = UNIT_FILE_DISABLED;
- else if (UNIT_FILE_INSTALL_INFO_HAS_ALSO(i))
+ else if (unit_file_install_info_has_also(i))
state = UNIT_FILE_INDIRECT;
else
state = UNIT_FILE_STATIC;
assert(presets);
if (scope == UNIT_FILE_SYSTEM)
- r = conf_files_list(&files, ".preset", root_dir,
+ r = conf_files_list(&files, ".preset", root_dir, 0,
"/etc/systemd/system-preset",
+ "/run/systemd/system-preset",
"/usr/local/lib/systemd/system-preset",
"/usr/lib/systemd/system-preset",
-#ifdef HAVE_SPLIT_USR
+#if HAVE_SPLIT_USR
"/lib/systemd/system-preset",
#endif
NULL);
else if (scope == UNIT_FILE_GLOBAL)
- r = conf_files_list(&files, ".preset", root_dir,
+ r = conf_files_list(&files, ".preset", root_dir, 0,
"/etc/systemd/user-preset",
+ "/run/systemd/user-preset",
"/usr/local/lib/systemd/user-preset",
"/usr/lib/systemd/user-preset",
NULL);
if (r < 0)
return r;
if (!streq(name, i->name)) {
- log_debug("Skipping %s because is an alias for %s", name, i->name);
+ log_debug("Skipping %s because it is an alias for %s.", name, i->name);
return 0;
}
else if (r == -ENOLINK)
r = unit_file_changes_add(changes, n_changes,
UNIT_FILE_IS_DANGLING, de->d_name, NULL);
+ else if (r == -EADDRNOTAVAIL) /* Ignore generated/transient units when applying preset */
+ continue;
if (r < 0)
return r;
}
}
Hashmap* unit_file_list_free(Hashmap *h) {
- UnitFileList *i;
-
- while ((i = hashmap_steal_first(h)))
- unit_file_list_free_one(i);
-
- return hashmap_free(h);
+ return hashmap_free_with_destructor(h, unit_file_list_free_one);
}
DEFINE_TRIVIAL_CLEANUP_FUNC(UnitFileList*, unit_file_list_free_one);
projects / thirdparty / systemd.git / blobdiff