analyze: avoid a null dereference

[elogind.git] / src / analyze / analyze.c

diff --git a/src/analyze/analyze.c b/src/analyze/analyze.c
index fdbce7cda87a09fd7c88f73105adb7d971b8375d..1281d6b9ea835dfaae5ccf1a6a40bc6a059687f5 100644 (file)
--- a/src/analyze/analyze.c
+++ b/src/analyze/analyze.c
@@ -277,7 +277,8 @@ static int acquire_time_data(sd_bus *bus, struct unit_times **out) {
         return c;
 
 fail:
-        free_unit_times(unit_times, (unsigned) c);
+        if (unit_times)
+                free_unit_times(unit_times, (unsigned) c);
         return r;
 }
 
@@ -1201,8 +1202,8 @@ static void help(void) {
                "     --fuzz=TIMESPAN      When printing the tree of the critical chain, print also\n"
                "                          services, which finished TIMESPAN earlier, than the\n"
                "                          latest in the branch. The unit of TIMESPAN is seconds\n"
-               "                          unless specified with a different unit, i.e. 50ms\n\n"
-               "     --no-man             Do not check for existence of man pages\n"
+               "                          unless specified with a different unit, i.e. 50ms\n"
+               "     --man[=BOOL]         Do [not] check for existence of man pages\n\n"
                "Commands:\n"
                "  time                    Print time spent in the kernel before reaching userspace\n"
                "  blame                   Print list of running units ordered by time to init\n"
@@ -1211,7 +1212,7 @@ static void help(void) {
                "  dot                     Output dependency graph in dot(1) format\n"
                "  set-log-level LEVEL     Set logging threshold for systemd\n"
                "  dump                    Output state serialization of service manager\n"
-               "  verify                  Check unit files for correctness\n"
+               "  verify FILE...          Check unit files for correctness\n"
                , program_invocation_short_name);
 
         /* When updating this list, including descriptions, apply
@@ -1230,7 +1231,7 @@ static int parse_argv(int argc, char *argv[]) {
                 ARG_DOT_TO_PATTERN,
                 ARG_FUZZ,
                 ARG_NO_PAGER,
-                ARG_NO_MAN,
+                ARG_MAN,
         };
 
         static const struct option options[] = {
@@ -1244,7 +1245,7 @@ static int parse_argv(int argc, char *argv[]) {
                 { "to-pattern",   required_argument, NULL, ARG_DOT_TO_PATTERN   },
                 { "fuzz",         required_argument, NULL, ARG_FUZZ             },
                 { "no-pager",     no_argument,       NULL, ARG_NO_PAGER         },
-                { "no-man",       no_argument,       NULL, ARG_NO_MAN           },
+                { "man",          optional_argument, NULL, ARG_MAN              },
                 { "host",         required_argument, NULL, 'H'                  },
                 { "machine",      required_argument, NULL, 'M'                  },
                 {}
@@ -1315,8 +1316,18 @@ static int parse_argv(int argc, char *argv[]) {
                         arg_host = optarg;
                         break;
 
-                case ARG_NO_MAN:
-                        arg_man = false;
+                case ARG_MAN:
+                        if (optarg) {
+                                r = parse_boolean(optarg);
+                                if (r < 0) {
+                                        log_error("Failed to parse --man= argument.");
+                                        return -EINVAL;
+                                }
+
+                                arg_man = !!r;
+                        } else
+                                arg_man = true;
+
                         break;
 
                 case '?':