add sleep & date, thanks kamil

LICENSE

@@ -1,6 +1,7 @@
 MIT/X Consortium License
 
 © 2011 Connor Lane Smith <cls@lubutu.com>
+© 2011 Kamil Cholewiński <harry666t@gmail.com>
 
 Permission is hereby granted, free of charge, to any person obtaining a
 copy of this software and associated documentation files (the "Software"),

Makefile

@@ -1,6 +1,6 @@
 include config.mk
 
-SRC = basename.c cat.c echo.c false.c grep.c tee.c touch.c true.c wc.c
+SRC = basename.c cat.c date.c echo.c false.c grep.c sleep.c tee.c touch.c true.c wc.c
 OBJ = $(SRC:.c=.o) util.o
 BIN = $(SRC:.c=)
 MAN = $(SRC:.c=.1)

cat.1

@@ -3,7 +3,7 @@
 cat \- concatenate files
 .SH SYNOPSIS
 .B cat
-.RI [ files ...]
+.RI [ file ...]
 .SH DESCRIPTION
 .B cat
 reads each file in sequence and writes it to stdout.  If no file is given, cat

config.mk

@@ -1,8 +1,8 @@
 # sbase version
 VERSION = 0.0
 
-CC = cc
-#CC = musl-gcc
+#CC = cc
+CC = musl-gcc
 
 CPPFLAGS = -D_BSD_SOURCE
 CFLAGS   = -Os -ansi -Wall -pedantic $(CPPFLAGS)

date.1

@@ -0,0 +1,20 @@
+.TH DATE 1 sbase\-VERSION
+.SH NAME
+date \- print date and time
+.SH SYNOPSIS
+.B date
+.RB [ \-d
+.IR time ]
+.RI [+ format ]
+.SH DESCRIPTION
+.B date
+prints the date and time. If a
+.I format
+is given it is used to format the date as per
+.BR strftime (3).
+.SH OPTIONS
+.TP
+.BI \-d " time"
+prints
+.I time
+instead of the system time, given as the number of seconds since the Unix epoch.

date.c

@@ -0,0 +1,32 @@
+/* See LICENSE file for copyright and license details. */
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include "util.h"
+
+int
+main(int argc, char *argv[])
+{
+	char buf[BUFSIZ];
+	char *fmt = "%c";
+	int i;
+	struct tm *now = NULL;
+	time_t t;
+
+	t = time(NULL);
+	for(i = 1; i < argc; i++)
+		if(!strncmp("+", argv[i], 1))
+			fmt = &argv[i][1];
+		else if(!strcmp("-d", argv[i]) && i+1 < argc)
+			t = strtol(argv[++i], NULL, 0);
+		else
+			eprintf("usage: %s [-d time] [+format]\n", argv[0]);
+	now = localtime(&t);
+	if(!now)
+		eprintf("localtime failed\n");
+
+	strftime(buf, sizeof buf, fmt, now);
+	puts(buf);
+	return EXIT_SUCCESS;
+}

sleep.1

@@ -0,0 +1,9 @@
+.TH SLEEP 1 sbase\-VERSION
+.SH NAME
+sleep \- wait for a number of seconds
+.SH SYNOPSIS
+.B sleep
+.I seconds
+.SH DESCRIPTION
+.B sleep
+waits until the given number of seconds have elapsed.

sleep.c

@@ -0,0 +1,18 @@
+/* See LICENSE file for copyright and license details. */
+#include <stdlib.h>
+#include <unistd.h>
+#include "util.h"
+
+int
+main(int argc, char *argv[])
+{
+	unsigned int seconds;
+
+	if(argc != 2)
+		eprintf("usage: %s seconds\n", argv[0]);
+
+	seconds = atoi(argv[1]);
+	while((seconds = sleep(seconds)) > 0)
+		;
+	return EXIT_SUCCESS;
+}

touch.c

@@ -21,7 +21,6 @@ main(int argc, char *argv[])
 	int i;
 
 	t = time(NULL);
-
 	for(i = 1; i < argc; i++)
 		if(!strcmp(argv[i], "-c"))
 			cflag = true;