1 # ksh
2 
3 OpenBSD ksh (sometimes called opdksh or oksh) is the default shell on
4 OpenBSD, and is generally my go-to choince on other systems too.  It has
5 a good ratio of features and simplicity
6 
7 	if [ "$TERM" = dumb ]; then
8 		PS1='$ '
9 		return
10 	fi
11 
12 Enable emacs-like command editing regardless of $EDITOR and csh-like
13 history expansion with !
14 
15 	set -o emacs
16 	set -o csh-history
17 
18 Talking about history, by default ksh won't store any, which is
19 unfortunate.  I can't live without my C-r working!
20 
21 	HISTCONTROL=ignoredups:ignorespace
22 	HISTFILE=$HOME/.history
23 	HISTSIZE=10000
24 
25 OpenBSD ksh has a limited support for programmed completions through
26 static lists.  The completions are provided via an array called
27 complete_$progname; or complete_$progname_$nth for the nth argument.
28 
29 Here's the completions for ssh and scp:
30 
31 	HOST_LIST=$(awk '/Host / {print $2}' ~/.ssh/config | xargs echo)
32 
33 	set -A complete_ssh -- $HOST_LIST
34 	set -A complete_scp -- $HOST_LIST
35 
36 and for kill(1) and pkill(1)
37 
38 	set -A complete_kill_1 -- -9 -HUP -INFO -KILL -TERM
39 	set -A complete_pkill_2 -- -SIGHUP -SIGUSR1 -SIGUSR2 -SIGTERM -SIGKILL
40 
41 and for vmd(8) if available
42 
43 	if pgrep -fq /usr/sbin/vmd; then
44 		set -A complete_vmctl_1 -- console load reload start stop \
45 			reset status send receive
46 		set -A complete_vmctl -- \
47 			$(vmctl status | awk '!/NAME/{printf "%s ", $NF}')
48 	fi
49 
50 and for ifconfig(8)
51 
52 	set -A complete_ifconfig_1 -- $(ifconfig | grep ^[a-z] | cut -d: -f1)
53 
54 and for got(1)
55 
56 	set -A complete_got_1 --	\
57 		init			\
58 		import im		\
59 		clone cl		\
60 		fetch fe		\
61 		checkout co		\
62 		update up		\
63 		status st		\
64 		log			\
65 		diff di			\
66 		blame bl		\
67 		tree tr			\
68 		ref			\
69 		branch br		\
70 		tag			\
71 		add			\
72 		remove rm		\
73 		patch pa		\
74 		revert rv		\
75 		commit ci		\
76 		send se			\
77 		cherrypick cy		\
78 		backout bo		\
79 		rebase rb		\
80 		histedit he		\
81 		integrate ig		\
82 		merge mg		\
83 		stage sg		\
84 		unstage ug		\
85 		cat			\
86 		info
87 
88 Tweak the output of ls
89 
90 	alias ls='ls -F'
91 
92 reset(1) doesn't work as expected inside tmux: the old output can still
93 be consulted when scrolling.  If I, lazy as I am, bother to type "reset"
94 I want to be sure that the history was cleared!
95 
96 	if [ -n "$TMUX" ]; then
97 		alias reset='reset && tmux clear-history'
98 	fi
99 
100 CDPATH is super useful!  I even wrote a post about it:
101 https://www.omarpolo.com/post/enjoying-cdpath.html
102 
103 	export CDPATH=".:$HOME/w:/usr/ports:/usr/ports/mystuff:$HOME/quicklisp/local-projects"
104 
105 I love to hate gpg!  It needs some special treatments to work and this
106 should also (finger crossed!) fix pinentry over ssh.  I'm not sure it
107 works though, it's been a while since I've connected remotely to my
108 desktop.
109 
110 	export GPG_TTY=$(tty)
111 	if [ -n "$SSH_CONNECTION" ]; then
112 		export PINENTRY_USER_DATA="USE_CURSES=1"
113 	fi
114 
115 The BSDs have this incredibly useful signal available, it's a shame not
116 to use it!
117 
118 	stty status ^T
119 
120 I really like my prompt to be as minimal as possible.  For some time
121 I've used a single colon `;' as prompt, it's really nice!  At the moment
122 thought I'm usign a more plan9-esque percent sign:
123 
124 	PS1='% '
125 
126 I got tired of trying to remember the set of flags for nc to walk to
127 Gemini servers, so here we are:
128 
129 	# "post" stdin to the gemini server
130 	# usage: gem host [port]
131 	gem()
132 	{
133 		host="${1:?missing host}"
134 		port="${2:-1965}"
135 		nc -c -Tnoverify "${host}" "${port}"
136 	}
137 
138 I think I've stolen these from someone.  It makes a copy of the file and
139 launch an editor on the original file, incledibly useful when working
140 with ports (that's why doas!)
141 
142 	mgdiff()
143 	{
144 		if [ -z "$1" ]; then
145 			printf "%s\n" "USAGE: mgdiff file" >&2
146 			return
147 		fi
148 		doas cp -p "$1" "$1.orig"
149 		doas mg "$1"
150 	}
151 
152 hist is a quick wrapper around history and grep to quickly search for a
153 previous command:
154 
155 	hist()
156 	{
157 		if [ -z "$1" ]; then
158 			printf "%s\n" "USAGE: hist pattern" >&2
159 			return 1
160 		fi
161 		history 0 | grep "$1"
162 	}
163 
164 clbin (the site) is a web pastebin that's easy to use from the command
165 line with curl.  clbin (the function) is an easy way to share something,
166 just pipe it to clbin and it returns an url.
167 
168 	clbin()
169 	{
170 		curl -F 'clbin=<-' https://clbin.com
171 	}
172 
173 Some aliases I use when working with the OpenBSD port tree:
174 
175 	alias m="make"
176 	alias mup="make update-patches"
177 	alias mupl="make update-plist"
178 	alias mpldc="make port-lib-depends-check"
179 	alias build="MAKE_JOBS=5 time make 2>&1 | tee build"
180 	alias pclean='make clean="package plist"'
181 
182 And even more aliases:
183 
184 	alias mopnew="mdirs ~/Maildir/op | grep -v emacs | mlist -st | mthread -r | mseq -S"
185 
186 	for c in com rep fwd bnc; do
187 		alias o$c="m$c -from 'Omar Polo <op@openbsd.org>'"
188 	done
189 
190 find(1) is an invaluable tool and I use it all the time.  walk is an
191 attempt to build a wrapper around some common usages of find that is a
192 little bit less verbose to use.  The name is stolen from 9front, but the
193 implementation is completely different.
194 
195 	# usage: walk [dir] [type] [name regexp] [! command to execute]
196 	walk()
197 	{
198 		if [ $# -eq 0 ]; then
199 			find .
200 			return
201 		fi
202 
203 		local dir=.
204 		local type=
205 		local name=\*
206 
207 		if [ -n "$1" -a -d "$1" ]; then
208 			dir="$1"
209 			shift
210 		fi
211 
212 		case "$1" in
213 		b|c|d|f|l|p|s)
214 			type="-type $1"
215 			shift
216 		esac
217 
218 		if [ -n "$1" -a "x$1" != "x!" ]; then
219 			name="$1"
220 			shift
221 		fi
222 
223 		if [ "x$1" = x! ]; then
224 			shift
225 		fi
226 
227 		if [ $# -eq 0 ]; then
228 			find "$dir" $type -iname "$name"
229 		else
230 			find "$dir" $type -iname "$name" -exec "$@" {} +
231 		fi
232 	}