time-util: add parse_time(), which is like parse_sec() but allows specification of default time unit if none is specified

This is useful if we want to parse RLIMIT_RTTIME values where the common
UNIX syntax is without any units but refers to a non-second unit (µs in
this case), but where we want to allow specification of units.

1 files changed, 23 insertions, 0 deletions

diff --git a/src/test/test-time.c b/src/test/test-time.c
index 3840fff061..820e4aaee2 100644
--- a/src/test/test-time.c
+++ b/src/test/test-time.c
@@ -57,6 +57,28 @@ static void test_parse_sec(void) {
         assert_se(parse_sec(".3 infinity", &u) < 0);
 }
 
+static void test_parse_time(void) {
+        usec_t u;
+
+        assert_se(parse_time("5", &u, 1) >= 0);
+        assert_se(u == 5);
+
+        assert_se(parse_time("5", &u, USEC_PER_MSEC) >= 0);
+        assert_se(u == 5 * USEC_PER_MSEC);
+
+        assert_se(parse_time("5", &u, USEC_PER_SEC) >= 0);
+        assert_se(u == 5 * USEC_PER_SEC);
+
+        assert_se(parse_time("5s", &u, 1) >= 0);
+        assert_se(u == 5 * USEC_PER_SEC);
+
+        assert_se(parse_time("5s", &u, USEC_PER_SEC) >= 0);
+        assert_se(u == 5 * USEC_PER_SEC);
+
+        assert_se(parse_time("5s", &u, USEC_PER_MSEC) >= 0);
+        assert_se(u == 5 * USEC_PER_SEC);
+}
+
 static void test_parse_nsec(void) {
         nsec_t u;
 
@@ -161,6 +183,7 @@ static void test_get_timezones(void) {
 
 int main(int argc, char *argv[]) {
         test_parse_sec();
+        test_parse_time();
         test_parse_nsec();
         test_format_timespan(1);
         test_format_timespan(USEC_PER_MSEC);