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authorMichael Stapelberg <michael@stapelberg.de>2012-10-16 10:14:03 +0200
committerLennart Poettering <lennart@poettering.net>2012-10-16 16:18:41 +0200
commit37e2941d144f362c0585974939cf12ad01aa0258 (patch)
treee49ae9a4ba9cf7b0ccc4fed37000af03a882697b
parenta2ab7ee6122a5006cafc45d7b81f726656fb65cc (diff)
service: Heuristically determine whether SysV scripts support reload
This commit checks for a usage line which contains [{|]reload[|}"] (to not errnously match force-reload). Heuristics like this suck, but it solves a real problem and there appears to be no better way...
-rw-r--r--src/core/service.c44
1 files changed, 36 insertions, 8 deletions
diff --git a/src/core/service.c b/src/core/service.c
index 69c71508f8..7f9a53af46 100644
--- a/src/core/service.c
+++ b/src/core/service.c
@@ -526,7 +526,7 @@ static ExecCommand *exec_command_new(const char *path, const char *arg1) {
return c;
}
-static int sysv_exec_commands(Service *s) {
+static int sysv_exec_commands(Service *s, const bool supports_reload) {
ExecCommand *c;
assert(s);
@@ -543,14 +543,25 @@ static int sysv_exec_commands(Service *s) {
return -ENOMEM;
exec_command_append_list(s->exec_command+SERVICE_EXEC_STOP, c);
- c = exec_command_new(UNIT(s)->source_path, "reload");
- if (!c)
- return -ENOMEM;
- exec_command_append_list(s->exec_command+SERVICE_EXEC_RELOAD, c);
+ if (supports_reload) {
+ c = exec_command_new(UNIT(s)->source_path, "reload");
+ if (!c)
+ return -ENOMEM;
+ exec_command_append_list(s->exec_command+SERVICE_EXEC_RELOAD, c);
+ }
return 0;
}
+static bool usage_contains_reload(const char *line) {
+ return (strcasestr(line, "{reload|") ||
+ strcasestr(line, "{reload}") ||
+ strcasestr(line, "{reload\"") ||
+ strcasestr(line, "|reload|") ||
+ strcasestr(line, "|reload}") ||
+ strcasestr(line, "|reload\""));
+}
+
static int service_load_sysv_path(Service *s, const char *path) {
FILE *f;
Unit *u;
@@ -560,10 +571,12 @@ static int service_load_sysv_path(Service *s, const char *path) {
NORMAL,
DESCRIPTION,
LSB,
- LSB_DESCRIPTION
+ LSB_DESCRIPTION,
+ USAGE_CONTINUATION
} state = NORMAL;
char *short_description = NULL, *long_description = NULL, *chkconfig_description = NULL, *description;
struct stat st;
+ bool supports_reload = false;
assert(s);
assert(path);
@@ -612,8 +625,23 @@ static int service_load_sysv_path(Service *s, const char *path) {
line++;
t = strstrip(l);
- if (*t != '#')
+ if (*t != '#') {
+ /* Try to figure out whether this init script supports
+ * the reload operation. This heuristic looks for
+ * "Usage" lines which include the reload option. */
+ if ( state == USAGE_CONTINUATION ||
+ (state == NORMAL && strcasestr(t, "usage"))) {
+ if (usage_contains_reload(t)) {
+ supports_reload = true;
+ state = NORMAL;
+ } else if (t[strlen(t)-1] == '\\')
+ state = USAGE_CONTINUATION;
+ else
+ state = NORMAL;
+ }
+
continue;
+ }
if (state == NORMAL && streq(t, "### BEGIN INIT INFO")) {
state = LSB;
@@ -906,7 +934,7 @@ static int service_load_sysv_path(Service *s, const char *path) {
}
}
- if ((r = sysv_exec_commands(s)) < 0)
+ if ((r = sysv_exec_commands(s, supports_reload)) < 0)
goto finish;
if (s->sysv_runlevels &&
chars_intersect(RUNLEVELS_BOOT, s->sysv_runlevels) &&