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authorLennart Poettering <lennart@poettering.net>2017-02-08 01:48:56 +0100
committerZbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl>2017-02-07 19:48:56 -0500
commit0698b674920aa8a56dbd6a625729a35e5ae9c5df (patch)
tree6c699078d5fd92df2a085a94c133d10d5cd4eec2
parent8331eaabc7093a879914494e6b397f5a28f3cac9 (diff)
fix handling of templates instantiated in /usr/lib (#5263)
Fix handling of templates instantiated in /usr/lib. All work to fix #5136.
-rw-r--r--src/shared/install.c150
-rw-r--r--src/test/test-install-root.c23
2 files changed, 126 insertions, 47 deletions
diff --git a/src/shared/install.c b/src/shared/install.c
index 478abac8ab..f25ed685f6 100644
--- a/src/shared/install.c
+++ b/src/shared/install.c
@@ -208,7 +208,7 @@ static int path_is_control(const LookupPaths *p, const char *path) {
path_equal_ptr(parent, p->runtime_control);
}
-static int path_is_config(const LookupPaths *p, const char *path) {
+static int path_is_config(const LookupPaths *p, const char *path, bool check_parent) {
_cleanup_free_ char *parent = NULL;
assert(p);
@@ -217,15 +217,19 @@ static int path_is_config(const LookupPaths *p, const char *path) {
/* Note that we do *not* have generic checks for /etc or /run in place, since with
* them we couldn't discern configuration from transient or generated units */
- parent = dirname_malloc(path);
- if (!parent)
- return -ENOMEM;
+ if (check_parent) {
+ parent = dirname_malloc(path);
+ if (!parent)
+ return -ENOMEM;
- return path_equal_ptr(parent, p->persistent_config) ||
- path_equal_ptr(parent, p->runtime_config);
+ path = parent;
+ }
+
+ return path_equal_ptr(path, p->persistent_config) ||
+ path_equal_ptr(path, p->runtime_config);
}
-static int path_is_runtime(const LookupPaths *p, const char *path) {
+static int path_is_runtime(const LookupPaths *p, const char *path, bool check_parent) {
_cleanup_free_ char *parent = NULL;
const char *rpath;
@@ -239,16 +243,20 @@ static int path_is_runtime(const LookupPaths *p, const char *path) {
if (rpath && path_startswith(rpath, "/run"))
return true;
- parent = dirname_malloc(path);
- if (!parent)
- return -ENOMEM;
+ if (check_parent) {
+ parent = dirname_malloc(path);
+ if (!parent)
+ return -ENOMEM;
- return path_equal_ptr(parent, p->runtime_config) ||
- path_equal_ptr(parent, p->generator) ||
- path_equal_ptr(parent, p->generator_early) ||
- path_equal_ptr(parent, p->generator_late) ||
- path_equal_ptr(parent, p->transient) ||
- path_equal_ptr(parent, p->runtime_control);
+ path = parent;
+ }
+
+ return path_equal_ptr(path, p->runtime_config) ||
+ path_equal_ptr(path, p->generator) ||
+ path_equal_ptr(path, p->generator_early) ||
+ path_equal_ptr(path, p->generator_late) ||
+ path_equal_ptr(path, p->transient) ||
+ path_equal_ptr(path, p->runtime_control);
}
static int path_is_vendor(const LookupPaths *p, const char *path) {
@@ -677,7 +685,6 @@ static int find_symlinks_fd(
int fd,
const char *path,
const char *config_path,
- const LookupPaths *lp,
bool *same_name_link) {
_cleanup_closedir_ DIR *d = NULL;
@@ -688,7 +695,6 @@ static int find_symlinks_fd(
assert(fd >= 0);
assert(path);
assert(config_path);
- assert(lp);
assert(same_name_link);
d = fdopendir(fd);
@@ -722,7 +728,7 @@ static int find_symlinks_fd(
}
/* This will close nfd, regardless whether it succeeds or not */
- q = find_symlinks_fd(root_dir, name, nfd, p, config_path, lp, same_name_link);
+ q = find_symlinks_fd(root_dir, name, nfd, p, config_path, same_name_link);
if (q > 0)
return 1;
if (r == 0)
@@ -800,7 +806,6 @@ static int find_symlinks(
const char *root_dir,
const char *name,
const char *config_path,
- const LookupPaths *lp,
bool *same_name_link) {
int fd;
@@ -817,44 +822,82 @@ static int find_symlinks(
}
/* This takes possession of fd and closes it */
- return find_symlinks_fd(root_dir, name, fd, config_path, config_path, lp, same_name_link);
+ return find_symlinks_fd(root_dir, name, fd, config_path, config_path, same_name_link);
}
static int find_symlinks_in_scope(
- UnitFileScope scope,
const LookupPaths *paths,
const char *name,
UnitFileState *state) {
- bool same_name_link_runtime = false, same_name_link = false;
+ bool same_name_link_runtime = false, same_name_link_config = false;
+ bool enabled_in_runtime = false, enabled_at_all = false;
+ char **p;
int r;
- assert(scope >= 0);
- assert(scope < _UNIT_FILE_SCOPE_MAX);
assert(paths);
assert(name);
- /* First look in the persistent config path */
- r = find_symlinks(paths->root_dir, name, paths->persistent_config, paths, &same_name_link);
- if (r < 0)
- return r;
- if (r > 0) {
- *state = UNIT_FILE_ENABLED;
- return r;
+ STRV_FOREACH(p, paths->search_path) {
+ bool same_name_link = false;
+
+ r = find_symlinks(paths->root_dir, name, *p, &same_name_link);
+ if (r < 0)
+ return r;
+ if (r > 0) {
+ /* We found symlinks in this dir? Yay! Let's see where precisely it is enabled. */
+
+ r = path_is_config(paths, *p, false);
+ if (r < 0)
+ return r;
+ if (r > 0) {
+ /* This is the best outcome, let's return it immediately. */
+ *state = UNIT_FILE_ENABLED;
+ return 1;
+ }
+
+ r = path_is_runtime(paths, *p, false);
+ if (r < 0)
+ return r;
+ if (r > 0)
+ enabled_in_runtime = true;
+ else
+ enabled_at_all = true;
+
+ } else if (same_name_link) {
+
+ r = path_is_config(paths, *p, false);
+ if (r < 0)
+ return r;
+ if (r > 0)
+ same_name_link_config = true;
+ else {
+ r = path_is_runtime(paths, *p, false);
+ if (r < 0)
+ return r;
+ if (r > 0)
+ same_name_link_runtime = true;
+ }
+ }
}
- /* Then look in runtime config path */
- r = find_symlinks(paths->root_dir, name, paths->runtime_config, paths, &same_name_link_runtime);
- if (r < 0)
- return r;
- if (r > 0) {
+ if (enabled_in_runtime) {
*state = UNIT_FILE_ENABLED_RUNTIME;
- return r;
+ return 1;
+ }
+
+ /* Here's a special rule: if the unit we are looking for is an instance, and it symlinked in the search path
+ * 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)) {
+ *state = UNIT_FILE_STATIC;
+ return 1;
}
/* Hmm, we didn't find it, but maybe we found the same name
* link? */
- if (same_name_link) {
+ if (same_name_link_config) {
*state = UNIT_FILE_LINKED;
return 1;
}
@@ -1354,7 +1397,8 @@ static int install_info_follow(
InstallContext *c,
UnitFileInstallInfo *i,
const char *root_dir,
- SearchFlags flags) {
+ SearchFlags flags,
+ bool ignore_different_name) {
assert(c);
assert(i);
@@ -1367,7 +1411,7 @@ static int install_info_follow(
/* If the basename doesn't match, the caller should add a
* complete new entry for this. */
- if (!streq(basename(i->symlink_target), i->name))
+ if (!ignore_different_name && !streq(basename(i->symlink_target), i->name))
return -EXDEV;
free_and_replace(i->path, i->symlink_target);
@@ -1408,14 +1452,14 @@ static int install_info_traverse(
return -ELOOP;
if (!(flags & SEARCH_FOLLOW_CONFIG_SYMLINKS)) {
- r = path_is_config(paths, i->path);
+ r = path_is_config(paths, i->path, true);
if (r < 0)
return r;
if (r > 0)
return -ELOOP;
}
- r = install_info_follow(c, i, paths->root_dir, flags);
+ r = install_info_follow(c, i, paths->root_dir, flags, false);
if (r == -EXDEV) {
_cleanup_free_ char *buffer = NULL;
const char *bn;
@@ -1439,6 +1483,18 @@ static int install_info_traverse(
if (r < 0)
return r;
+ if (streq(buffer, i->name)) {
+
+ /* We filled in the instance, and the target stayed the same? If so, then let's
+ * honour the link as it is. */
+
+ r = install_info_follow(c, i, paths->root_dir, flags, true);
+ if (r < 0)
+ return r;
+
+ continue;
+ }
+
bn = buffer;
}
@@ -2027,7 +2083,7 @@ static int path_shall_revert(const LookupPaths *paths, const char *path) {
/* Checks whether the path is one where the drop-in directories shall be removed. */
- r = path_is_config(paths, path);
+ r = path_is_config(paths, path, true);
if (r != 0)
return r;
@@ -2135,7 +2191,7 @@ int unit_file_revert(
if (errno != ENOENT)
return -errno;
} else if (S_ISREG(st.st_mode) || S_ISLNK(st.st_mode)) {
- r = path_is_config(&paths, path);
+ r = path_is_config(&paths, path, true);
if (r < 0)
return r;
if (r > 0) {
@@ -2481,7 +2537,7 @@ static int unit_file_lookup_state(
switch (i->type) {
case UNIT_FILE_TYPE_MASKED:
- r = path_is_runtime(paths, i->path);
+ r = path_is_runtime(paths, i->path, true);
if (r < 0)
return r;
@@ -2505,7 +2561,7 @@ static int unit_file_lookup_state(
break;
}
- r = find_symlinks_in_scope(scope, paths, i->name, &state);
+ r = find_symlinks_in_scope(paths, i->name, &state);
if (r < 0)
return r;
if (r == 0) {
diff --git a/src/test/test-install-root.c b/src/test/test-install-root.c
index d0bc8004f3..575401cb91 100644
--- a/src/test/test-install-root.c
+++ b/src/test/test-install-root.c
@@ -736,6 +736,28 @@ static void test_preset_order(const char *root) {
assert_se(unit_file_get_state(UNIT_FILE_SYSTEM, root, "prefix-2.service", &state) >= 0 && state == UNIT_FILE_DISABLED);
}
+static void test_static_instance(const char *root) {
+ UnitFileState state;
+ const char *p;
+
+ assert_se(unit_file_get_state(UNIT_FILE_SYSTEM, root, "static-instance@.service", &state) == -ENOENT);
+ assert_se(unit_file_get_state(UNIT_FILE_SYSTEM, root, "static-instance@foo.service", &state) == -ENOENT);
+
+ p = strjoina(root, "/usr/lib/systemd/system/static-instance@.service");
+ assert_se(write_string_file(p,
+ "[Install]\n"
+ "WantedBy=multi-user.target\n", WRITE_STRING_FILE_CREATE) >= 0);
+
+ assert_se(unit_file_get_state(UNIT_FILE_SYSTEM, root, "static-instance@.service", &state) >= 0 && state == UNIT_FILE_DISABLED);
+ assert_se(unit_file_get_state(UNIT_FILE_SYSTEM, root, "static-instance@foo.service", &state) >= 0 && state == UNIT_FILE_DISABLED);
+
+ p = strjoina(root, "/usr/lib/systemd/system/static-instance@foo.service");
+ assert_se(symlink("static-instance@.service", p) >= 0);
+
+ assert_se(unit_file_get_state(UNIT_FILE_SYSTEM, root, "static-instance@.service", &state) >= 0 && state == UNIT_FILE_DISABLED);
+ assert_se(unit_file_get_state(UNIT_FILE_SYSTEM, root, "static-instance@foo.service", &state) >= 0 && state == UNIT_FILE_STATIC);
+}
+
int main(int argc, char *argv[]) {
char root[] = "/tmp/rootXXXXXX";
const char *p;
@@ -766,6 +788,7 @@ int main(int argc, char *argv[]) {
test_preset_and_list(root);
test_preset_order(root);
test_revert(root);
+ test_static_instance(root);
assert_se(rm_rf(root, REMOVE_ROOT|REMOVE_PHYSICAL) >= 0);