Support kill by signal name

userspace/core/kill.c

@@ -1,8 +1,7 @@
 /* This file is part of ToaruOS and is released under the terms
  * of the NCSA / University of Illinois License - see LICENSE.md
- * Copyright (C) 2013 Kevin Lange
- */
-/*
+ * Copyright (C) 2013-2017 Kevin Lange
+ *
  * kill
  *
  * Send a signal to another process
@@ -13,6 +12,51 @@
 #include <unistd.h>
 #include <signal.h>
 
+struct sig_def {
+	int sig;
+	const char * name;
+};
+
+struct sig_def signals[] = {
+	{SIGHUP,"HUP"},
+	{SIGINT,"INT"},
+	{SIGQUIT,"QUIT"},
+	{SIGILL,"ILL"},
+	{SIGTRAP,"TRAP"},
+	{SIGABRT,"ABRT"},
+	{SIGEMT,"EMT"},
+	{SIGFPE,"FPE"},
+	{SIGKILL,"KILL"},
+	{SIGBUS,"BUS"},
+	{SIGSEGV,"SEGV"},
+	{SIGSYS,"SYS"},
+	{SIGPIPE,"PIPE"},
+	{SIGALRM,"ALRM"},
+	{SIGTERM,"TERM"},
+	{SIGUSR1,"USR1"},
+	{SIGUSR2,"USR2"},
+	{SIGCHLD,"CHLD"},
+	{SIGPWR,"PWR"},
+	{SIGWINCH,"WINCH"},
+	{SIGURG,"URG"},
+	{SIGPOLL,"POLL"},
+	{SIGSTOP,"STOP"},
+	{SIGTSTP,"TSTP"},
+	{SIGCONT,"CONT"},
+	{SIGTTIN,"TTIN"},
+	{SIGTTOUT,"TTOUT"},
+	{SIGVTALRM,"VTALRM"},
+	{SIGPROF,"PROF"},
+	{SIGXCPU,"XCPU"},
+	{SIGXFSZ,"XFSZ"},
+	{SIGWAITING,"WAITING"},
+	{SIGDIAF,"DIAF"},
+	{SIGHATE,"HATE"},
+	{SIGWINEVENT,"WINEVENT"},
+	{SIGCAT,"CAT"},
+	{0,NULL},
+};
+
 void usage(char * argv[]) {
 	printf(
 			"kill - send a signal to another process\n"
@@ -36,7 +80,34 @@ int main(int argc, char * argv[]) {
 
 	if (argc > 2) {
 		if (argv[1][0] == '-') {
+			signum = -1;
+			if (strlen(argv[1]+1) > 3 && !strncmp(argv[1]+1,"SIG",3)) {
+				struct sig_def * s = signals;
+				while (s->name) {
+					if (!strcmp(argv[1]+4,s->name)) {
+						signum = s->sig;
+						break;
+					}
+					s++;
+				}
+			} else {
+				if (argv[1][1] < '0' || argv[1][1] > '9') {
+					struct sig_def * s = signals;
+					while (s->name) {
+						if (!strcmp(argv[1]+1,s->name)) {
+							signum = s->sig;
+							break;
+						}
+						s++;
+					}
+				} else {
 					signum = atoi(argv[1]+1);
+				}
+			}
+			if (signum == -1) {
+				fprintf(stderr,"%s: %s: invalid signal specification\n",argv[0],argv[1]+1);
+				return 1;
+			}
 		} else {
 			usage(argv);
 			return 1;