[src/nathanw_sa]: src/lib/libpthread Instead of always doing the equivalent o...

[nathanw <nathanw%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/6fe9c9a96354
branches:  nathanw_sa
changeset: 504898:6fe9c9a96354
user:      nathanw <nathanw%NetBSD.org@localhost>
date:      Tue Jul 24 21:26:58 2001 +0000

description:
Instead of always doing the equivalent of tail -f on the log, add a -f
option to do that and make the default simply to display the log.
Add a -i option to initialize (clear) the log.
Oh, and add getopt framework and usage().

diffstat:

 lib/libpthread/debuglog.c |  60 +++++++++++++++++++++++++++++++++++++++++-----
 1 files changed, 53 insertions(+), 7 deletions(-)

diffs (107 lines):

diff -r 7972707a7162 -r 6fe9c9a96354 lib/libpthread/debuglog.c
--- a/lib/libpthread/debuglog.c Tue Jul 24 21:25:18 2001 +0000
+++ b/lib/libpthread/debuglog.c Tue Jul 24 21:26:58 2001 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: debuglog.c,v 1.1.2.1 2001/07/17 20:22:41 nathanw Exp $ */
+/*     $NetBSD: debuglog.c,v 1.1.2.2 2001/07/24 21:26:58 nathanw Exp $ */
 
 /*-
  * Copyright (c) 2001 The NetBSD Foundation, Inc.
@@ -40,13 +40,15 @@
 #include <stdarg.h>
 #include <stdio.h>
 #include <string.h>
+#include <unistd.h>
 #include <sys/shm.h>
 
 #include "pthread.h"
 #include "pthread_int.h"
 
 
-void pthread__debuglog_read(void);
+void pthread__debuglog_read(int);
+void usage(void);
 
 
 static struct pthread_msgbuf* debugbuf;
@@ -54,21 +56,57 @@
 int
 main(int argc, char *argv[])
 {
+       int ch;
+       extern int optind;
+       extern char *optarg;
+
+       int follow, initialize;
+
+       follow = 0;
+       initialize = 0;
+
+       while ((ch = getopt(argc, argv, "fi")) != -1)
+               switch (ch) {           
+               case 'f': 
+                       follow = 1;
+                       break;
+               case 'i':
+                       initialize = 1;
+                       break;
+
+               default:
+                       usage();
+                       /* NOTREACHED */
+               }
+       
+       argc -= optind;
+       argv += optind;
+
+       if (argc != 0)
+               usage();
 
        debugbuf = pthread__debuglog_init();
 
-       pthread__debuglog_read();
+       if (initialize) {
+               /* Initialize */
+               debugbuf->msg_magic = BUF_MAGIC;
+               debugbuf->msg_bufw = 0;
+               debugbuf->msg_bufr = 0;
+               debugbuf->msg_bufs = PTHREAD__DEBUG_SHMSIZE;
+       }
 
+       pthread__debuglog_read(follow);
+       
        return 0;
 }
 
 void
-pthread__debuglog_read(void)
+pthread__debuglog_read(int follow)
 {
 
        int readp, writep;
 
-       while (1) {
+       do {
 
                readp = debugbuf->msg_bufr;
                writep = debugbuf->msg_bufw;
@@ -84,9 +122,17 @@
 
                debugbuf->msg_bufr = writep;
 
-               sleep(1);
-       }
+               if (follow)
+                       sleep(1);
+       } while (follow);
 }
 
 
 
+
+void usage()
+{
+
+  fprintf(stderr,"usage: debuglog [-fi]\n");
+  exit(1);
+}