Index: cat.c
===================================================================
RCS file: /usr/ncvs/src/bin/cat/cat.c,v
retrieving revision 1.32
diff -u -r1.32 cat.c
--- cat.c	10 Jan 2005 08:39:20 -0000	1.32
+++ cat.c	2 Sep 2006 03:08:58 -0000
@@ -67,6 +67,7 @@
 int bflag, eflag, nflag, sflag, tflag, vflag;
 int rval;
 const char *filename;
+const char *datefmt;
 
 static void usage(void);
 static void scanfiles(char *argv[], int cooked);
@@ -84,7 +85,7 @@
 
 	setlocale(LC_CTYPE, "");
 
-	while ((ch = getopt(argc, argv, "benstuv")) != -1)
+	while ((ch = getopt(argc, argv, "benp:stuv")) != -1)
 		switch (ch) {
 		case 'b':
 			bflag = nflag = 1;	/* -b implies -n */
@@ -95,6 +96,8 @@
 		case 'n':
 			nflag = 1;
 			break;
+		case 'p':
+			datefmt = optarg;
 		case 's':
 			sflag = 1;
 			break;
@@ -177,6 +180,8 @@
 cook_cat(FILE *fp)
 {
 	int ch, gobble, line, prev;
+	char datebuf[1024];
+	time_t now;
 
 	/* Reset EOF condition on stdin. */
 	if (fp == stdin && feof(stdin))
@@ -198,6 +203,14 @@
 				if (ferror(stdout))
 					break;
 			}
+			if (datefmt != NULL) {
+				time(&now);
+				strftime(datebuf, sizeof(datebuf), datefmt,
+					 localtime(&now));
+				(void)fputs(datebuf, stdout);
+				if (ferror(stdout))
+					break;
+			}
 		}
 		if (ch == '\n') {
 			if (eflag && putchar('$') == EOF)