add uname, thanks hiltjo

LICENSE

@@ -4,6 +4,7 @@ MIT/X Consortium License
 © 2011 Kamil Cholewiński <harry666t@gmail.com>
 © 2011 stateless <stateless@archlinux.us>
 © 2011 Rob Pilling <robpilling@gmail.com>
+© 2011 Hiltjo Posthuma <hiltjo@codemadness.org>
 
 Permission is hereby granted, free of charge, to any person obtaining a
 copy of this software and associated documentation files (the "Software"),

Makefile

@@ -6,7 +6,7 @@ LIB = util/afgets.o util/agetcwd.o util/concat.o util/enmasse.o util/eprintf.o \
 
 SRC = basename.c cat.c chmod.c chown.c date.c dirname.c echo.c false.c grep.c \
       head.c ln.c ls.c mkdir.c mkfifo.c nl.c pwd.c rm.c sleep.c sort.c tail.c \
-      tee.c touch.c true.c wc.c
+      tee.c touch.c true.c uname.c wc.c
 OBJ = $(SRC:.c=.o) $(LIB)
 BIN = $(SRC:.c=)
 MAN = $(SRC:.c=.1)

sort.1

@@ -11,8 +11,8 @@ writes the sorted concatenation of the given files to stdout.  If no file is
 given, sort reads from stdin.
 .SH OPTIONS
 .TP
-.BI \-r
+.B \-r
 reverses the sort.
 .TP
-.BI \-u
+.B \-u
 prints repeated lines only once.

uname.1

@@ -0,0 +1,30 @@
+.TH UNAME 1 sbase\-VERSION
+.SH NAME
+uname \- print system information
+.SH SYNOPSIS
+.B uname
+.RB [ \-amnrsv ]
+.SH DESCRIPTION
+.B uname
+prints system information.  If no flags are given, uname will print only the
+name of the operating system
+.RB ( -s ).
+.SH OPTIONS
+.TP
+.B \-a
+print all the information below.
+.TP
+.B \-m
+print the machine's architecture.
+.TP
+.B \-n
+print the system's network name.
+.TP
+.B \-r
+print the operating system's release name.
+.TP
+.B \-s
+print the name of the operating system.
+.TP
+.B \-v
+print the operating system's version name.

uname.c

@@ -0,0 +1,58 @@
+/* See LICENSE file for copyright and license details. */
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/utsname.h>
+#include "util.h"
+
+int
+main(int argc, char *argv[])
+{
+	bool mflag = false;
+	bool nflag = false;
+	bool rflag = false;
+	bool sflag = false;
+	bool vflag = false;
+	char c;
+	struct utsname u;
+
+	while((c = getopt(argc, argv, "amnrsv")) != -1)
+		switch(c) {
+		case 'a':
+			mflag = nflag = rflag = sflag = vflag = true;
+			break;
+		case 'm':
+			mflag = true;
+			break;
+		case 'n':
+			nflag = true;
+			break;
+		case 'r':
+			rflag = true;
+			break;
+		case 's':
+			sflag = true;
+			break;
+		case 'v':
+			vflag = true;
+			break;
+		default:
+			exit(EXIT_FAILURE);
+		}
+	if(uname(&u) == -1)
+		eprintf("uname failed:");
+
+	if(sflag || !(nflag || rflag || vflag || mflag))
+		printf("%s ", u.sysname);
+	if(nflag)
+		printf("%s ", u.nodename);
+	if(rflag)
+		printf("%s ", u.release);
+	if(vflag)
+		printf("%s ", u.version);
+	if(mflag)
+		printf("%s ", u.machine);
+	putchar('\n');
+	return EXIT_SUCCESS;
+}