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diff --git a/contrib/ts/ts.1 b/contrib/ts/ts.1
new file mode 100644
--- /dev/null
+++ b/contrib/ts/ts.1
@@ -0,0 +1,112 @@
+.\" $OpenBSD: ts.1,v 1.6 2022/06/30 21:40:41 jmc Exp $
+.\"
+.\" Copyright (c) 2022 Job Snijders <job@openbsd.org>
+.\"
+.\" Permission to use, copy, modify, and distribute this software for any
+.\" purpose with or without fee is hereby granted, provided that the above
+.\" copyright notice and this permission notice appear in all copies.
+.\"
+.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+.\"
+.Dd June 30, 2022
+.Dt TS 1
+.Os
+.Sh NAME
+.Nm ts
+.Nd timestamp input
+.Sh SYNOPSIS
+.Nm
+.Op Fl i | s
+.Op Fl m
+.Op Ar format
+.Sh DESCRIPTION
+The
+.Nm
+utility prepends a timestamp to each line of standard input and writes
+it to standard output.
+.Pp
+The options are as follows:
+.Bl -tag -width Ds
+.It Fl i
+Display time elapsed since the last timestamp.
+.It Fl m
+Display timestamps derived from a strictly linearly increasing clock.
+Without
+.Fl m ,
+timestamps reflect the current date and time, including time jumps if the
+system time is changed.
+.It Fl s
+Display time elapsed since the start of the program.
+.El
+.Pp
+The optional
+.Ar format
+argument controls how the timestamp is displayed, according to the conversion
+specifications described in the
+.Xr strftime 3
+manual page.
+The default format is
+.Qq %b %d %H:%M:%S ;
+or
+.Qq %H:%M:%S
+if one of the
+.Fl i
+or
+.Fl s
+options is used.
+.Pp
+Some additional conversion specifications are also supported
+to append microsecond resolution:
+.Cm %.S ,
+.Cm %.s ,
+and
+.Cm %.T ;
+which are similar to
+.Cm %S ,
+.Cm %s ,
+and
+.Cm \&%T .
+Examples:
+.Qq 10.00001 ,
+.Qq 1656427781.00001 ,
+and
+.Qq 4:20:00.00001 .
+.Sh EXAMPLES
+.Bd -literal -offset indent
+$ (echo foo; sleep 2; echo bar) | ts
+Jun 28 12:13:38 foo
+Jun 28 12:13:40 bar
+
+$ ls | ts -i %.S
+00.000452 CVS
+00.000595 Makefile
+00.000004 ts.1
+00.000004 ts.c
+.Ed
+.Sh SEE ALSO
+.Xr strftime 3
+.Sh HISTORY
+A
+.Nm
+utility first appeared in the moreutils collection by Joey Hess, and was
+rewritten from scratch for
+.Ox 7.2 .
+.Pp
+It was imported to
+.Fx
+by
+.An -nosplit
+.An Juraj Lutter Aq Mt otis@FreeBSD.org .
+.Sh AUTHORS
+This
+.Nm
+utility was written by
+.An Job Snijders Aq Mt job@openbsd.org
+and
+.An Claudio Jeker Aq Mt claudio@openbsd.org .
diff --git a/contrib/ts/ts.c b/contrib/ts/ts.c
new file mode 100644
--- /dev/null
+++ b/contrib/ts/ts.c
@@ -0,0 +1,171 @@
+/* $OpenBSD: ts.c,v 1.7 2022/07/06 07:59:03 claudio Exp $ */
+/*
+ * Copyright (c) 2022 Job Snijders <job@openbsd.org>
+ * Copyright (c) 2022 Claudio Jeker <claudio@openbsd.org>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <sys/types.h>
+#include <sys/time.h>
+
+#include <err.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <time.h>
+
+static const char *format = "%b %d %H:%M:%S";
+static char *buf;
+static char *outbuf;
+static size_t bufsize;
+
+static void fmtfmt(const struct timespec *);
+static void __dead2 usage(void);
+
+int
+main(int argc, char *argv[])
+{
+ int iflag, mflag, sflag;
+ int ch, prev;
+ struct timespec start, now, utc_offset, ts;
+ clockid_t clock = CLOCK_REALTIME;
+
+ iflag = mflag = sflag = 0;
+
+ while ((ch = getopt(argc, argv, "ims")) != -1) {
+ switch (ch) {
+ case 'i':
+ iflag = 1;
+ format = "%H:%M:%S";
+ clock = CLOCK_MONOTONIC;
+ break;
+ case 'm':
+ mflag = 1;
+ clock = CLOCK_MONOTONIC;
+ break;
+ case 's':
+ sflag = 1;
+ format = "%H:%M:%S";
+ clock = CLOCK_MONOTONIC;
+ break;
+ default:
+ usage();
+ }
+ }
+ argc -= optind;
+ argv += optind;
+
+ if ((iflag && sflag) || argc > 1)
+ usage();
+
+ if (argc == 1)
+ format = *argv;
+
+ bufsize = strlen(format);
+ if (bufsize > SIZE_MAX / 10)
+ errx(1, "format string too big");
+
+ bufsize *= 10;
+ if ((buf = calloc(1, bufsize)) == NULL)
+ err(1, NULL);
+ if ((outbuf = calloc(1, bufsize)) == NULL)
+ err(1, NULL);
+
+ /* force UTC for interval calculations */
+ if (iflag || sflag)
+ if (setenv("TZ", "UTC", 1) == -1)
+ err(1, "setenv UTC");
+
+ clock_gettime(clock, &start);
+ clock_gettime(CLOCK_REALTIME, &utc_offset);
+ timespecsub(&utc_offset, &start, &utc_offset);
+
+ for (prev = '\n'; (ch = getchar()) != EOF; prev = ch) {
+ if (prev == '\n') {
+ clock_gettime(clock, &now);
+ if (iflag || sflag)
+ timespecsub(&now, &start, &ts);
+ else if (mflag)
+ timespecadd(&now, &utc_offset, &ts);
+ else
+ ts = now;
+ fmtfmt(&ts);
+ if (iflag)
+ start = now;
+ }
+ if (putchar(ch) == EOF)
+ break;
+ }
+
+ if (fclose(stdout))
+ err(1, "stdout");
+ return 0;
+}
+
+static void __dead2
+usage(void)
+{
+ fprintf(stderr, "usage: %s [-i | -s] [-m] [format]\n", getprogname());
+ exit(1);
+}
+
+/*
+ * yo dawg, i heard you like format strings
+ * so i put format strings in your user supplied input
+ * so you can format while you format
+ */
+static void
+fmtfmt(const struct timespec *ts)
+{
+ struct tm *tm;
+ char *f, us[7];
+
+ if ((tm = localtime(&ts->tv_sec)) == NULL)
+ err(1, "localtime");
+
+ snprintf(us, sizeof(us), "%06ld", ts->tv_nsec / 1000);
+ strlcpy(buf, format, bufsize);
+ f = buf;
+
+ do {
+ while ((f = strchr(f, '%')) != NULL && f[1] == '%')
+ f += 2;
+
+ if (f == NULL)
+ break;
+
+ f++;
+ if (f[0] == '.' &&
+ (f[1] == 'S' || f[1] == 's' || f[1] == 'T')) {
+ size_t l;
+
+ f[0] = f[1];
+ f[1] = '.';
+ f += 2;
+ l = strlen(f);
+ memmove(f + 6, f, l + 1);
+ memcpy(f, us, 6);
+ f += 6;
+ }
+ } while (*f != '\0');
+
+ if (strftime(outbuf, bufsize, buf, tm) == 0)
+ errx(1, "strftime");
+
+ fprintf(stdout, "%s ", outbuf);
+ if (ferror(stdout))
+ exit(1);
+}
diff --git a/usr.bin/Makefile b/usr.bin/Makefile
--- a/usr.bin/Makefile
+++ b/usr.bin/Makefile
@@ -155,6 +155,7 @@
tr \
true \
truncate \
+ ts \
tsort \
tty \
uname \
diff --git a/usr.bin/ts/Makefile b/usr.bin/ts/Makefile
new file mode 100644
--- /dev/null
+++ b/usr.bin/ts/Makefile
@@ -0,0 +1,7 @@
+.PATH: ${SRCTOP}/contrib/ts
+
+PROG= ts
+SRCS= ts.c
+MAN= ts.1
+
+.include <bsd.prog.mk>

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