kill[all[5]],pkill: make signal list show signal numbers, and show RTMIN/MAX

function                                             old     new   delta
print_signames                                        31      64     +33
signals                                              224     231      +7

Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>

1 files changed, 16 insertions, 1 deletions

diff --git a/libbb/u_signal_names.c b/libbb/u_signal_names.c
index 93cebe2fb..8c78f5e20 100644
--- a/libbb/u_signal_names.c
+++ b/libbb/u_signal_names.c
@@ -124,6 +124,16 @@ static const char signals[][7] = {
 #ifdef SIGSYS
         [SIGSYS   ] = "SYS",
 #endif
+#if ENABLE_FEATURE_RTMINMAX
+# ifdef __SIGRTMIN
+        [__SIGRTMIN] = "RTMIN",
+# endif
+// This makes array about x2 bigger.
+// More compact approach is to special-case SIGRTMAX in print_signames()
+//# ifdef __SIGRTMAX
+//      [__SIGRTMAX] = "RTMAX",
+//# endif
+#endif
 };
 
 // Convert signal name to number.
@@ -216,6 +226,11 @@ void FAST_FUNC print_signames(void)
         for (signo = 1; signo < ARRAY_SIZE(signals); signo++) {
                 const char *name = signals[signo];
                 if (name[0])
-                        puts(name);
+                        printf("%2u) %s\n", signo, name);
         }
+#if ENABLE_FEATURE_RTMINMAX
+# ifdef __SIGRTMAX
+        printf("%2u) %s\n", __SIGRTMAX, "RTMAX");
+# endif
+#endif
 }