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-rw-r--r--src/core/load-fragment-gperf.gperf.m41
-rw-r--r--src/shared/install.c57
2 files changed, 53 insertions, 5 deletions
diff --git a/src/core/load-fragment-gperf.gperf.m4 b/src/core/load-fragment-gperf.gperf.m4
index f0e25c0c5d..5be4daddee 100644
--- a/src/core/load-fragment-gperf.gperf.m4
+++ b/src/core/load-fragment-gperf.gperf.m4
@@ -230,4 +230,5 @@ Path.DirectoryMode, config_parse_mode, 0,
m4_dnl The [Install] section is ignored here.
Install.Alias, NULL, 0, 0
Install.WantedBy, NULL, 0, 0
+Install.RequiredBy, NULL, 0, 0
Install.Also, NULL, 0, 0
diff --git a/src/shared/install.c b/src/shared/install.c
index 560bb24a93..d6644e580f 100644
--- a/src/shared/install.c
+++ b/src/shared/install.c
@@ -43,6 +43,7 @@ typedef struct {
char **aliases;
char **wanted_by;
+ char **required_by;
} InstallInfo;
typedef struct {
@@ -883,6 +884,7 @@ static void install_info_free(InstallInfo *i) {
free(i->path);
strv_free(i->aliases);
strv_free(i->wanted_by);
+ strv_free(i->required_by);
free(i);
}
@@ -1021,9 +1023,10 @@ static int unit_file_load(
bool allow_symlink) {
const ConfigTableItem items[] = {
- { "Install", "Alias", config_parse_strv, 0, &info->aliases },
- { "Install", "WantedBy", config_parse_strv, 0, &info->wanted_by },
- { "Install", "Also", config_parse_also, 0, c },
+ { "Install", "Alias", config_parse_strv, 0, &info->aliases },
+ { "Install", "WantedBy", config_parse_strv, 0, &info->wanted_by },
+ { "Install", "RequiredBy", config_parse_strv, 0, &info->required_by },
+ { "Install", "Also", config_parse_also, 0, c },
{ NULL, NULL, NULL, 0, NULL }
};
@@ -1050,7 +1053,10 @@ static int unit_file_load(
if (r < 0)
return r;
- return strv_length(info->aliases) + strv_length(info->wanted_by);
+ return
+ strv_length(info->aliases) +
+ strv_length(info->wanted_by) +
+ strv_length(info->required_by);
}
static int unit_file_search(
@@ -1121,7 +1127,10 @@ static int unit_file_can_install(
r = unit_file_search(&c, i, paths, root_dir, allow_symlink);
if (r >= 0)
- r = strv_length(i->aliases) + strv_length(i->wanted_by);
+ r =
+ strv_length(i->aliases) +
+ strv_length(i->wanted_by) +
+ strv_length(i->required_by);
install_context_done(&c);
@@ -1241,6 +1250,40 @@ static int install_info_symlink_wants(
return r;
}
+static int install_info_symlink_requires(
+ InstallInfo *i,
+ const char *config_path,
+ bool force,
+ UnitFileChange **changes,
+ unsigned *n_changes) {
+
+ char **s;
+ int r = 0, q;
+
+ assert(i);
+ assert(config_path);
+
+ STRV_FOREACH(s, i->required_by) {
+ char *path;
+
+ if (!unit_name_is_valid_no_type(*s, true)) {
+ r = -EINVAL;
+ continue;
+ }
+
+ if (asprintf(&path, "%s/%s.requires/%s", config_path, *s, i->name) < 0)
+ return -ENOMEM;
+
+ q = create_symlink(i->path, path, force, changes, n_changes);
+ free(path);
+
+ if (r == 0)
+ r = q;
+ }
+
+ return r;
+}
+
static int install_info_symlink_link(
InstallInfo *i,
LookupPaths *paths,
@@ -1290,6 +1333,10 @@ static int install_info_apply(
if (r == 0)
r = q;
+ q = install_info_symlink_requires(i, config_path, force, changes, n_changes);
+ if (r == 0)
+ r = q;
+
q = install_info_symlink_link(i, paths, config_path, force, changes, n_changes);
if (r == 0)
r = q;