utils

commit: 87274b96510774cf6a6ae3737f57bea4f1d7114b
parent bb481deac770083524b18577724cfa21b2061d78
Author: Haelwenn (lanodan) Monnier <contact@hacktivis.me>
Date:   Sat, 19 Nov 2022 20:27:46 +0100

cmd/sleep: New utility

Diffstat:
M
Makefile
3
+++
A
cmd/sleep.1
30
++++++++++++++++++++++++++++++
A
cmd/sleep.c
72
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
M
configure
6
++++--
M
coreutils.txt
2
+-

5 files changed, 110 insertions(+), 3 deletions(-)
diff --git a/Makefile b/Makefile
@@ -67,3 +67,6 @@ cmd/strings: cmd/strings.c Makefile
 	rm -f ${<:=.gcov} ${@:=.gcda} ${@:=.gcno}
 	$(CC) -std=c99 $(CFLAGS) $(LIBBSD_CFLAGS) -o $@ $< $(LIBBSD_LIBS) $(LDFLAGS)
 
+cmd/sleep: cmd/sleep.c Makefile
+	rm -f ${<:=.gcov} ${@:=.gcda} ${@:=.gcno}
+	$(CC) -std=c99 $(CFLAGS) $(LIBBSD_CFLAGS) -o $@ $< $(LIBBSD_LIBS) $(LDFLAGS)
diff --git a/cmd/sleep.1 b/cmd/sleep.1
@@ -0,0 +1,30 @@
+.\" Collection of Unix tools, comparable to coreutils
+.\" Copyright 2017-2022 Haelwenn (lanodan) Monnier <contact+utils@hacktivis.me>
+.\" SPDX-License-Identifier: GPL-2.0-only OR GPL-3.0-only
+.Dd 2022-11-19
+.Dt SLEEP 1
+.Os
+.Sh NAME
+.Nm sleep
+.Nd delay for a specified amount of time
+.Sh SYNOPSIS
+.Nm
+.Ar duration ...
+.Sh DESCRIPTION
+The
+.nm
+utily shell suspends execution for the total of each
+.Ar duration
+argument.
+.Pp
+.Ar duration
+is a non-negative decimal integer optionally followed by a suffix: s for seconds (default), m for minutes, h for hours.
+Longer durations are taken as out of scope.
+.Sh SEE ALSO
+.Xr sleep 3 ,
+.Xr crontab 1 ,
+.Xr at 1
+.Sh EXIT STATUS
+.Ex -std
+.Sh AUTHORS
+.An Haelwenn (lanodan) Monnier Aq Mt contact@hacktivis.me
diff --git a/cmd/sleep.c b/cmd/sleep.c
@@ -0,0 +1,72 @@
+// Collection of Unix tools, comparable to coreutils
+// SPDX-FileCopyrightText: 2017-2022 Haelwenn (lanodan) Monnier <contact+utils@hacktivis.me>
+// SPDX-License-Identifier: GPL-2.0-only OR GPL-3.0-only
+
+#define _DEFAULT_SOURCE
+// strtou
+#define _NETBSD_SOURCE
+// On non-BSDs use libbsd
+#include <errno.h>    // ENOTSUP
+#include <inttypes.h> // strtou
+#include <limits.h>   // UINT_MAX, _POSIX_ARG_MAX
+#include <stdio.h>    // fprintf
+#include <stdlib.h>   // exit
+#include <string.h>   // strnlen, strerror
+#include <unistd.h>   // sleep
+
+uintmax_t
+argtonum(char *arg)
+{
+	char *end;
+	int err       = 0;
+	uintmax_t dur = strtou(arg, &end, 10, 1, UINT_MAX, &err);
+	if(err != 0 && err != ENOTSUP)
+	{
+		fprintf(stderr, "sleep: Error parsing '%s' as a number: %s\n", arg, strerror(err));
+		exit(1);
+	}
+	if(end[0] != 0)
+	{
+		size_t end_len = strnlen(end, _POSIX_ARG_MAX);
+		if(end_len != 1)
+		{
+			fprintf(stderr, "sleep: suffix '%s' is too long, should be only one character\n", end);
+			exit(1);
+		}
+		switch(end[0])
+		{
+		case 's': // seconds
+			break;
+		case 'm': // minutes
+			dur *= 60;
+			break;
+		case 'h': // hours
+			dur *= 60 * 60;
+			break;
+		default:
+			fprintf(stderr, "sleep: Unknown suffix %c\n", end[0]);
+			exit(1);
+		}
+	}
+
+	return dur;
+}
+
+int
+main(int argc, char *argv[])
+{
+	unsigned int dur = 0;
+	for(int i = 1; i < argc; i++)
+	{
+		dur += argtonum(argv[i]);
+	}
+	if(dur == 0)
+	{
+		fprintf(stderr, "sleep: Got a duration of 0\n");
+		return 1;
+	}
+
+	sleep(dur);
+
+	return 0;
+}
diff --git a/configure b/configure
@@ -176,17 +176,19 @@ do
 	pkg_config_check --exists "$dep" || exit 1
 done
 
-# TODO: Check for humanize_number and strtonum existance
+# TODO: Check for strtonum and strtou existance
 if pkg_config_check libbsd-overlay
 then
 	LIBBSD_CFLAGS="$("${PKGCONFIG}" --cflags libbsd-overlay) -DHAVE_LIBBSD"
 	LIBBSD_LIBS="$("${PKGCONFIG}" --libs libbsd-overlay)"
 else
 	cat >> target_filter <<EOF
+# strtou
+sleep.c
+sleep.1
 # strtonum
 strings.c
 strings.1
-# humanize_number
 humanize.c
 humanize.1
 EOF
diff --git a/coreutils.txt b/coreutils.txt
@@ -75,7 +75,7 @@ sha384sum: No
 sha512sum: No
 shred: ?
 shuf: Todo
-sleep: Todo
+sleep: Done
 sort: ?
 split: No. Considered obsolete
 stat: Todo