diff options
Diffstat (limited to 'usr.bin/kstat/kstat.c')
| -rw-r--r-- | usr.bin/kstat/kstat.c | 51 |
1 files changed, 47 insertions, 4 deletions
diff --git a/usr.bin/kstat/kstat.c b/usr.bin/kstat/kstat.c index b2920031f58..8ec9c37a921 100644 --- a/usr.bin/kstat/kstat.c +++ b/usr.bin/kstat/kstat.c @@ -1,4 +1,4 @@ -/* $OpenBSD: kstat.c,v 1.4 2020/08/10 06:51:40 dlg Exp $ */ +/* $OpenBSD: kstat.c,v 1.5 2020/08/11 01:07:47 dlg Exp $ */ /* * Copyright (c) 2020 David Gwynne <dlg@openbsd.org> @@ -112,14 +112,15 @@ static int kstat_filter_entry(struct kstat_filters *, static void kstat_list(struct kstat_tree *, int, unsigned int, struct kstat_filters *); static void kstat_print(struct kstat_tree *); +static void kstat_read(struct kstat_tree *, int); __dead static void usage(void) { extern char *__progname; - fprintf(stderr, "usage: %s [name|provider:0:name:unit ...]\n", - __progname); + fprintf(stderr, "usage: %s [-w wait] " + "[name|provider:0:name:unit ...]\n", __progname); exit(1); } @@ -131,9 +132,28 @@ main(int argc, char *argv[]) struct kstat_tree kt = RBT_INITIALIZER(); unsigned int version; int fd; + const char *errstr; + int ch; + struct timespec interval = { 0, 0 }; int i; - for (i = 1; i < argc; i++) { + while ((ch = getopt(argc, argv, "w:")) != -1) { + switch (ch) { + case 'w': + interval.tv_sec = strtonum(optarg, 1, 100000000, + &errstr); + if (errstr != NULL) + errx(1, "wait %s: %s", optarg, errstr); + break; + default: + usage(); + } + } + + argc -= optind; + argv += optind; + + for (i = 0; i < argc; i++) { struct kstat_filter *kf = kstat_filter_parse(argv[i]); TAILQ_INSERT_TAIL(&kfs, kf, kf_entry); } @@ -148,6 +168,16 @@ main(int argc, char *argv[]) kstat_list(&kt, fd, version, &kfs); kstat_print(&kt); + if (interval.tv_sec == 0) + return (0); + + for (;;) { + nanosleep(&interval, NULL); + + kstat_read(&kt, fd); + kstat_print(&kt); + } + return (0); } @@ -496,3 +526,16 @@ kstat_print(struct kstat_tree *kt) } } } + +static void +kstat_read(struct kstat_tree *kt, int fd) +{ + struct kstat_entry *kse; + struct kstat_req *ksreq; + + RBT_FOREACH(kse, kstat_tree, kt) { + ksreq = &kse->kstat; + if (ioctl(fd, KSTATIOC_FIND_ID, ksreq) == -1) + err(1, "update id %llu", ksreq->ks_id); + } +} |