Refactor uname(1) code and manpage

remove stdlib.h-include which was there for no reason and clear
up the manpage.

README

@@ -72,7 +72,7 @@ The following tools are implemented ('*' == finished, '#' == UTF-8 support,
 #* tr              yes                             none
 =* true            yes                             none
 =* tty             yes                             none
-=  uname           yes                             none
+=* uname           yes                             none
 #  unexpand        yes                             none
 =  uniq            no                              -f, -s
 =  unlink          yes                             none

uname.1

@@ -9,12 +9,10 @@
 .Op Fl amnrsv
 .Sh DESCRIPTION
 .Nm
-prints system information. If no flags are given,
+writes system information to stdout. If no flags are given,
 .Nm
-will print only the
+implies
-name of the operating system as
+.Fl s .
-.Fl s
-would.
 .Sh OPTIONS
 .Bl -tag -width Ds
 .It Fl a
@@ -22,7 +20,7 @@ Print all the information below.
 .It Fl m
 Print the machine's architecture.
 .It Fl n
-Print the system's network name.
+Print the system's network node hostname.
 .It Fl r
 Print the operating system's release name.
 .It Fl s
@@ -32,3 +30,9 @@ Print the operating system's version name.
 .El
 .Sh SEE ALSO
 .Xr uname 2
+.Sh STANDARDS
+The
+.Nm
+utility is compliant with the
+.St -p1003.1-2008
+specification.

uname.c

@@ -1,6 +1,5 @@
 /* See LICENSE file for copyright and license details. */
 #include <stdio.h>
-#include <stdlib.h>
 #include <sys/utsname.h>
 #include <unistd.h>
 
@@ -15,12 +14,8 @@ usage(void)
 int
 main(int argc, char *argv[])
 {
-	int mflag = 0;
-	int nflag = 0;
-	int rflag = 0;
-	int sflag = 0;
-	int vflag = 0;
 	struct utsname u;
+	int mflag = 0, nflag = 0, rflag = 0, sflag = 0, vflag = 0;
 
 	ARGBEGIN {
 	case 'a':
@@ -44,6 +39,7 @@ main(int argc, char *argv[])
 	default:
 		usage();
 	} ARGEND;
+
 	if (uname(&u) < 0)
 		eprintf("uname:");