Improve signal name<->number conversions.

Include all the signals, not just the POSIX ones.

In particular, improve support for real-time signals. My attempt to
switch AOSP builds over to toybox timeout got reverted when I broke the
ART build bots which use SIGRTMIN+2.

Also fix `kill -l 3` to show "QUIT" and `kill -l QUIT` to show "3".

Also make the `kill -l` output include numbers and names, and format it
to look better on a 80x24 tty, because it's always August 1978 somewhere.

1 files changed, 2 insertions, 0 deletions

diff --git a/lib/lib.h b/lib/lib.h
index 080c533f..7f79bdb8 100644
--- a/lib/lib.h
+++ b/lib/lib.h
@@ -229,6 +229,7 @@ char *chomp(char *s);
 int unescape(char c);
 char *strend(char *str, char *suffix);
 int strstart(char **a, char *b);
+int strcasestart(char **a, char *b);
 off_t fdlength(int fd);
 void loopfiles_rw(char **argv, int flags, int permissions,
   void (*function)(int fd, char *name));
@@ -388,6 +389,7 @@ void generic_signal(int signal);
 void exit_signal(int signal);
 void sigatexit(void *handler);
 int sig_to_num(char *pidstr);
+void list_signals();
 char *num_to_sig(int sig);
 
 mode_t string_to_mode(char *mode_str, mode_t base);