[hackers] [sbase] Audit hostname(1) || FRIGN

[git]

commit dad8dec550b94b5db7dc97b77a34ca0a26ad44ca
Author: FRIGN <d...@frign.de>
Date:   Sat Feb 28 21:22:55 2015 +0100

    Audit hostname(1)
    
    1) Be strict about argc
    2) Fix a small error in the manpage

diff --git a/README b/README
index 870b497..363536b 100644
--- a/README
+++ b/README
@@ -35,7 +35,7 @@ The following tools are implemented ('*' == finished, '#' == 
UTF-8 support,
 #*  fold            yes                          none
 =*  grep            yes                          none
 =*  head            yes                          none
-=*  hostname        non-posix                    none
+=*| hostname        non-posix                    none
 =*  kill            yes                          none
 =*| link            yes                          none
 =*  ln              yes                          none
diff --git a/hostname.1 b/hostname.1
index 28dc4df..9be4b1d 100644
--- a/hostname.1
+++ b/hostname.1
@@ -1,4 +1,4 @@
-.Dd January 30, 2015
+.Dd February 28, 2015
 .Dt HOSTNAME 1
 .Os sbase
 .Sh NAME
@@ -13,6 +13,6 @@ sets the current host name to
 .Ar name .
 If no
 .Ar name
-is given, the current hostname is written to stdout.
+is given, the current host name is written to stdout.
 .Sh SEE ALSO
 .Xr hostname 7
diff --git a/hostname.c b/hostname.c
index 55ed0ca..2aad4ad 100644
--- a/hostname.c
+++ b/hostname.c
@@ -21,13 +21,16 @@ main(int argc, char *argv[])
                usage();
        } ARGEND;
 
-       if (argc < 1) {
+       if (!argc) {
                if (gethostname(host, sizeof(host)) < 0)
                        eprintf("gethostname:");
                puts(host);
-       } else {
+       } else if (argc == 1) {
                if (sethostname(argv[0], strlen(argv[0])) < 0)
                        eprintf("sethostname:");
+       } else {
+               usage();
        }
+
        return 0;
 }