rlimit-util: rework rlimit_{from|to}_string() to work without "Limit" prefix

let's make the call more generic, so that we can also easily use it for
parsing "RLIMIT_xyz" style constants.

diff --git a/src/shared/bus-util.c b/src/shared/bus-util.c
index 9d3bd4a82b4cead7d349614473ca06a727baa43c..4cfe40433a63bd21c27afbd320d220cf0382e87e 100644 (file)
--- a/src/shared/bus-util.c
+++ b/src/shared/bus-util.c
@@ -1630,36 +1630,40 @@ int bus_property_get_rlimit(
                 void *userdata,
                 sd_bus_error *error) {
 
+        const char *is_soft;
         struct rlimit *rl;
         uint64_t u;
         rlim_t x;
-        const char *is_soft;
 
         assert(bus);
         assert(reply);
         assert(userdata);
 
         is_soft = endswith(property, "Soft");
+
         rl = *(struct rlimit**) userdata;
         if (rl)
                 x = is_soft ? rl->rlim_cur : rl->rlim_max;
         else {
                 struct rlimit buf = {};
+                const char *s, *p;
                 int z;
-                const char *s;
 
+                /* Chop off "Soft" suffix */
                 s = is_soft ? strndupa(property, is_soft - property) : property;
 
-                z = rlimit_from_string(strstr(s, "Limit"));
+                /* Skip over any prefix, such as "Default" */
+                assert_se(p = strstr(s, "Limit"));
+
+                z = rlimit_from_string(p + 5);
                 assert(z >= 0);
 
-                getrlimit(z, &buf);
+                (void) getrlimit(z, &buf);
                 x = is_soft ? buf.rlim_cur : buf.rlim_max;
         }
 
-        /* rlim_t might have different sizes, let's map
-         * RLIMIT_INFINITY to (uint64_t) -1, so that it is the same on
-         * all archs */
+        /* rlim_t might have different sizes, let's map RLIMIT_INFINITY to (uint64_t) -1, so that it is the same on all
+         * archs */
         u = x == RLIM_INFINITY ? (uint64_t) -1 : (uint64_t) x;
 
         return sd_bus_message_append(reply, "t", u);