1 files changed, 229 insertions, 0 deletions
diff --git a/bin/sleep/sleep.c b/bin/sleep/sleep.c
new file mode 100644
index 0000000..dfaf302
--- /dev/null
+++ b/bin/sleep/sleep.c
@@ -0,0 +1,229 @@
+/* $NetBSD: sleep.c,v 1.29 2019/01/27 02:00:45 christos Exp $ */
+
+/*
+ * Copyright (c) 1988, 1993, 1994
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+#ifndef lint
+__COPYRIGHT("@(#) Copyright (c) 1988, 1993, 1994\
+ The Regents of the University of California.  All rights reserved.");
+#endif /* not lint */
+
+#ifndef lint
+#if 0
+static char sccsid[] = "@(#)sleep.c	8.3 (Berkeley) 4/2/94";
+#else
+__RCSID("$NetBSD: sleep.c,v 1.29 2019/01/27 02:00:45 christos Exp $");
+#endif
+#endif /* not lint */
+
+#include <ctype.h>
+#include <err.h>
+#include <locale.h>
+#include <math.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include <unistd.h>
+
+__dead static void alarmhandle(int);
+__dead static void usage(void);
+
+static void report(const time_t, const time_t, const char *const);
+
+static volatile sig_atomic_t report_requested;
+static void
+report_request(int signo __unused)
+{
+
+	report_requested = 1;
+}
+
+int
+main(int argc, char *argv[])
+{
+	char *arg, *temp;
+	const char *msg;
+	double fval, ival, val;
+	struct timespec ntime;
+	time_t original;
+	int ch, fracflag;
+	unsigned delay;
+
+	setprogname(argv[0]);
+	(void)setlocale(LC_ALL, "");
+
+	(void)signal(SIGALRM, alarmhandle);
+
+	while ((ch = getopt(argc, argv, "")) != -1)
+		switch(ch) {
+		default:
+			usage();
+		}
+	argc -= optind;
+	argv += optind;
+
+	if (argc != 1)
+		usage();
+
+	/*
+	 * Okay, why not just use atof for everything? Why bother
+	 * checking if there is a fraction in use? Because the old
+	 * sleep handled the full range of integers, that's why, and a
+	 * double can't handle a large long. This is fairly useless
+	 * given how large a number a double can hold on most
+	 * machines, but now we won't ever have trouble. If you want
+	 * 1000000000.9 seconds of sleep, well, that's your
+	 * problem. Why use an isdigit() check instead of checking for
+	 * a period? Because doing it this way means locales will be
+	 * handled transparently by the atof code.
+	 *
+	 * Since fracflag is set for any non-digit, we also fall
+	 * into the floating point conversion path if the input
+	 * is hex (the 'x' in 0xA is not a digit).  Then if
+	 * strtod() handles hex (on NetBSD it does) so will we.
+	 * That path is also taken for scientific notation (1.2e+3)
+	 * and when the input is simply nonsense.
+	 */
+	fracflag = 0;
+	arg = *argv;
+	for (temp = arg; *temp != '\0'; temp++)
+		if (!isdigit((unsigned char)*temp)) {
+			ch = *temp;
+			fracflag++;
+		}
+
+	if (fracflag) {
+		/*
+		 * If we cannot convert the value using the user's locale
+		 * then try again using the C locale, so strtod() can always
+		 * parse values like 2.5, even if the user's locale uses
+		 * a different decimal radix character (like ',')
+		 *
+		 * (but only if that is the potential problem)
+		 */
+		val = strtod(arg, &temp);
+		if (*temp != '\0')
+			val = strtod_l(arg, &temp, LC_C_LOCALE);
+		if (val < 0 || temp == arg || *temp != '\0')
+			usage();
+
+		ival = floor(val);
+		fval = (1000000000 * (val-ival));
+		ntime.tv_sec = ival;
+		if ((double)ntime.tv_sec != ival)
+			errx(1, "requested delay (%s) out of range", arg);
+		ntime.tv_nsec = fval;
+
+		if (ntime.tv_sec == 0 && ntime.tv_nsec == 0)
+			return EXIT_SUCCESS;	/* was 0.0 or underflowed */
+	} else {
+		ntime.tv_sec = strtol(arg, &temp, 10);
+		if (ntime.tv_sec < 0 || temp == arg || *temp != '\0')
+			usage();
+
+		if (ntime.tv_sec == 0)
+			return EXIT_SUCCESS;
+		ntime.tv_nsec = 0;
+	}
+
+	original = ntime.tv_sec;
+	if (ntime.tv_nsec != 0)
+		msg = " and a bit";
+	else
+		msg = "";
+
+	signal(SIGINFO, report_request);
+
+	if (ntime.tv_sec <= 10000) {			/* arbitrary */
+		while (nanosleep(&ntime, &ntime) != 0) {
+			if (report_requested) {
+				report(ntime.tv_sec, original, msg);
+				report_requested = 0;
+			} else
+				err(EXIT_FAILURE, "nanosleep failed");
+		}
+	} else while (ntime.tv_sec > 0) {
+		delay = (unsigned int)ntime.tv_sec;
+
+		if ((time_t)delay != ntime.tv_sec || delay > 30 * 86400)
+			delay = 30 * 86400;
+
+		ntime.tv_sec -= delay;
+		delay = sleep(delay);
+		ntime.tv_sec += delay;
+
+		if (delay != 0 && report_requested) {
+			report(ntime.tv_sec, original, "");
+			report_requested = 0;
+		} else
+			break;
+	}
+
+	return EXIT_SUCCESS;
+	/* NOTREACHED */
+}
+
+	/* Reporting does not bother with nanoseconds. */
+static void
+report(const time_t remain, const time_t original, const char * const msg)
+{
+	if (remain == 0)
+		warnx("In the final moments of the original"
+		    " %jd%s second%s", (intmax_t)original, msg,
+		    original == 1 && *msg == '\0' ? "" : "s");
+	else if (remain < 2000)
+		warnx("Between %jd and %jd seconds left"
+		    " out of the original %g%s",
+		    (intmax_t)remain, (intmax_t)remain + 1, (double)original,
+		    msg);
+	else if ((original - remain) < 100000 && (original-remain) < original/8)
+		warnx("Have waited only %jd seconds of the original %g",
+			(intmax_t)(original - remain), (double)original);
+	else
+		warnx("Approximately %g seconds left out of the original %g",
+			(double)remain, (double)original);
+}
+
+static void
+usage(void)
+{
+	(void)fprintf(stderr, "usage: %s seconds\n", getprogname());
+	exit(EXIT_FAILURE);
+	/* NOTREACHED */
+}
+
+/* ARGSUSED */
+static void
+alarmhandle(int i)
+{
+	_exit(EXIT_SUCCESS);
+	/* NOTREACHED */
+}