add directory study

study/linux-travel/MINIX-1.5/1.5/Source/commands/kill.c

@@ -0,0 +1,37 @@
+/* kill - send a signal to a process	Author: Adri Koppes  */
+
+#include <sys/types.h>
+#include <signal.h>
+
+extern char *itoa();
+
+main(argc, argv)
+int argc;
+char **argv;
+{
+  int proc, signal = SIGTERM;
+
+  if (argc < 2) usage();
+  if (argc > 1 && *argv[1] == '-') {
+	signal = atoi(&argv[1][1]);
+	if (!signal) usage();
+	argv++;
+	argc--;
+  }
+  while (--argc) {
+	argv++;
+	proc = atoi(*argv);
+	if (!proc && strcmp(*argv, "0")) usage();
+	if (kill(proc, signal)) {
+		prints("Kill: %s no such process\n", itoa(proc));
+		exit(1);
+	}
+  }
+  exit(0);
+}
+
+usage()
+{
+  prints("Usage: kill [-sig] pid\n");
+  exit(1);
+}