[src/trunk]: src/usr.bin/sys_info + don't assume that tcsh is always installe...

[agc <agc%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/32df5ab40da3
branches:  trunk
changeset: 826171:32df5ab40da3
user:      agc <agc%NetBSD.org@localhost>
date:      Sat Aug 19 03:06:50 2017 +0000

description:
+ don't assume that tcsh is always installed, pointed out by jmcneill - thanks!

+ a "sys_info" invocation without any args is now the equivalent of sys_info -a,
just like pkg_info

diffstat:

 usr.bin/sys_info/sys_info.sh |  10 +++++++---
 1 files changed, 7 insertions(+), 3 deletions(-)

diffs (33 lines):

diff -r 195ec15bd876 -r 32df5ab40da3 usr.bin/sys_info/sys_info.sh
--- a/usr.bin/sys_info/sys_info.sh      Fri Aug 18 21:45:25 2017 +0000
+++ b/usr.bin/sys_info/sys_info.sh      Sat Aug 19 03:06:50 2017 +0000
@@ -1,6 +1,6 @@
 #! /bin/sh
 
-# $NetBSD: sys_info.sh,v 1.1 2016/06/04 15:27:11 agc Exp $
+# $NetBSD: sys_info.sh,v 1.2 2017/08/19 03:06:50 agc Exp $
 
 # Copyright (c) 2016 Alistair Crooks <agc%NetBSD.org@localhost>
 # All rights reserved.
@@ -107,7 +107,7 @@
                sshd -V 2>&1 | awk '/OpenSSH/ { sub("_", "D-", $1); print tolower($1) }'
                ;;
        tcsh)
-               tcsh -c 'echo $version' | awk '{ print $1 "-" $2 }'
+               grep '/tcsh' /etc/shells > /dev/null 2>&1 && tcsh -c 'echo $version' | awk '{ print $1 "-" $2 }'
                ;;
        unbound)
                case $(uname -s) in
@@ -122,7 +122,11 @@
        esac
 }
 
-all=false
+case $# in
+0)     all=true ;;
+*)     all=false ;;
+esac
+
 while [ $# -gt 0 ]; do
        case "$1" in
        -a)     all=true ;;