Userland+LibC: Add "kill -l" to show all known signal names/numbers

jlechem · Oct 29, 2020 · 77e9ead · 77e9ead
1 parent 662959b
commit 77e9ead
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Showing 3 changed files with 20 additions and 0 deletions.
diff --git a/Libraries/LibC/signal.cpp b/Libraries/LibC/signal.cpp
@@ -236,4 +236,13 @@ int getsignalbyname(const char* name)
  errno = EINVAL;
  return -1;
 }
+
+const char* getsignalname(int signal)
+{
+ if (signal < 0 || signal >= NSIG) {
+ errno = EINVAL;
+ return nullptr;
+ }
+ return signal_names[signal];
+}
 }
diff --git a/Libraries/LibC/signal.h b/Libraries/LibC/signal.h
@@ -76,6 +76,7 @@ int sigpending(sigset_t*);
 int sigsuspend(const sigset_t*);
 int raise(int sig);
 int getsignalbyname(const char*);
+const char* getsignalname(int);
 
 extern const char* sys_siglist[NSIG];
 

diff --git a/Userland/kill.cpp b/Userland/kill.cpp
@@ -46,6 +46,16 @@ int main(int argc, char** argv)
  return 1;
  }
 
+ if (argc == 2 && !strcmp(argv[1], "-l")) {
+ for (size_t i = 0; i < NSIG; ++i) {
+ if (i && !(i % 5))
+ outln("");
+ new_out("{:2}) {:10}", i, getsignalname(i));
+ }
+ outln("");
+ return 0;
+ }
+
  if (argc != 2 && argc != 3)
  print_usage_and_exit();
  unsigned signum = SIGTERM;