Add an option, -r, to get a readable boot time

Convert to getopt
Allow multiple hosts on the command line

1 files changed, 30 insertions, 7 deletions

diff --git a/btimec.c b/btimec.c
index 02c29bc..bea87bb 100644
--- a/btimec.c
+++ b/btimec.c
@@ -6,23 +6,46 @@
 
 #include <stdio.h>
 #include <stdlib.h>
+#include <unistd.h>
+#include <time.h>
 
 #include "btime.h"
 
+char usage[] = "USAGE: %s [-r] <host>\n";
+
 int
 main(int argc, char **argv)
 {
 	unsigned int bt;
 	char *btimedhost;
+	int readable = 0;
+	int c;
 
-	if (argc != 2) {
-		fprintf(stderr, "USAGE: %s <host>\n", argv[0]);
-		exit(2);
+	while ((c = getopt(argc, argv, "r")) != -1) {
+		switch (c) {
+			case 'r': 
+				readable = 1; 
+				break;
+			default: 
+				fprintf(stderr, usage, argv[0]);
+				exit(2);
+		}
 	}
 
-	btimedhost = argv[1];
-	bt = btime(btimedhost);
-	printf("%s: %u\n", btimedhost, bt);
-
+	if (optind >= argc) {
+		fprintf(stderr, usage, argv[0]);
+		exit(2);
+	}
+	for ( ; optind < argc; optind++) {
+		btimedhost = argv[optind];
+		bt = btime(btimedhost);
+		if (readable) {
+			time_t tt = bt;
+			time_t *ttp = &tt;
+			printf("%s: %s", btimedhost, bt ? ctime(ttp) : "down\n");
+		} else {
+			printf("%s: %u\n", btimedhost, bt);
+		}
+	}
 	exit(0);
 }