Warn about flags that have no effect with -c
* strace.c (init): Issue a warning if -i, -k, -r, -t, -T, or -y is used
along with -c.
This fixes Debian bug #443895.
diff --git a/strace.c b/strace.c
index fe197e5..46c9d63 100644
--- a/strace.c
+++ b/strace.c
@@ -1817,11 +1817,6 @@
error_msg_and_die("-D and -p are mutually exclusive");
}
-#ifdef USE_LIBUNWIND
- if (stack_trace_enabled)
- unwind_init();
-#endif
-
if (!followfork)
followfork = optF;
@@ -1833,6 +1828,28 @@
error_msg_and_die("-w must be given with (-c or -C)");
}
+ if (cflag == CFLAG_ONLY_STATS) {
+ if (iflag)
+ error_msg("-%c has no effect with -c", 'i');
+#ifdef USE_LIBUNWIND
+ if (stack_trace_enabled)
+ error_msg("-%c has no effect with -c", 'k');
+#endif
+ if (rflag)
+ error_msg("-%c has no effect with -c", 'r');
+ if (tflag)
+ error_msg("-%c has no effect with -c", 't');
+ if (Tflag)
+ error_msg("-%c has no effect with -c", 'T');
+ if (show_fd_path)
+ error_msg("-%c has no effect with -c", 'y');
+ }
+
+#ifdef USE_LIBUNWIND
+ if (stack_trace_enabled)
+ unwind_init();
+#endif
+
/* See if they want to run as another user. */
if (username != NULL) {
struct passwd *pent;