1 # collection of shell functions found in dot_files, wikis, etc
2 # around the world.  Some are written by me, of course.
3 
4 # Trivial conversion of a hex number to decimal
5 function hex2dec()
6 {
7 	[ -z "$1" ] && echo "No hex number given" && return
8 	if [[ ${1:0:2} != "0x" ]]; then
9 		echo "Please prefix string with 0x"
10 		return
11 	fi
12 	re='^[0-9a-fA-Fx]+$'
13 	if ! [[ $1 =~ $re ]]; then
14 		echo "Hex only contains 0-9a-fA-F and 0x as prefix"
15 		return
16 	fi
17 	printf "%d\n" $1
18 }
19 
20 # Trivial conversion of a decimal number to hex
21 function dec2hex()
22 {
23 	[ -z "$1" ] && echo "No decimal number given" && return
24 	re='^[0-9]+$'
25 	if ! [[ $1 =~ $re ]]; then
26 		echo "Decimal only contains 0-9"
27 		return
28 	fi
29 	printf "0x%x\n" $1
30 }
31 
32 # Generates a RSA 2048 bit keypair with DUMMY password
33 function kgenkey()
34 {
35 	[ -z "$1" ] && echo "No key alias given" && return
36 	keytool -genkeypair -keyalg RSA -keysize 2048 -alias "$1" \
37 		-dname "CN=Unknown,OU=Unknown,O=Unknown,L=Unknown,ST=Unknown,C=Unknown" \
38 		-storepass "test123" -keypass "test123" -keystore keystore.jks
39 }
40 
41 # Generate a CSR from the keystore generated w/ the cmd above
42 function kgencsr()
43 {
44 	[ -z "$1" ] && echo "No key alias given" && return
45 	keytool -certreq -alias "$1" -keystore keystore.jks -file "${1}.csr" \
46 		-storepass "test123" -keypass "test123"
47 }
48 
49 function kimportcert()
50 {
51 	[ -z "$1" ] && echo "No key alias given" && return
52 	[ -z "$2" ] && echo "No cert file given" && return
53 	keytool -import -alias "$1" -file "$2" -keystore keystore.jks \
54 		-storepass "test123" -keypass "test123" -trustcacerts
55 }
56 
57 function updatecvs()
58 {
59 	local _cvsdir=/home/matthias/cvs
60 	rsync -az --delete rsync://ftp.hostserver.de/cvsync/src $_cvsdir/cvs || return 1
61 	cd $_cvsdir/src && cvs -q up -P
62 }
63 
64 function cvspsdiff()
65 {
66 	[ -z "$1" ] && return
67 	cvsps -q -s "$1" -g | cdiff
68 }
69 
70 function sshopen()
71 {
72 	local AGPATH="$HOME"/.ssh/$(hostname).agent
73 
74 	rm -f $AGPATH
75 	command ssh-agent -t 345600 | grep -v echo > $AGPATH
76 	source $AGPATH
77 
78 	# Find all public keys...
79 	for i in `find $HOME/.ssh/ -maxdepth 1 -name "*.pub"`; do
80 		# ... and strip the .pub suffix
81 		_key=`echo $i | sed -e 's/\.pub//'`
82 		command ssh-add $_key
83 	done
84 }
85 
86 function psg()
87 {
88 	ps aux | grep "$@"
89 }
90 
91 function ssh()
92 {
93 	source_ssh_agent
94 	/usr/bin/ssh "$@"
95 }
96 
97 function scp()
98 {
99 	source_ssh_agent
100 	/usr/bin/scp "$@"
101 }
102 
103 function sshfs()
104 {
105 	source_ssh_agent
106 	/usr/bin/sshfs "$@"
107 }
108 
109 function source_ssh_agent()
110 {
111 	local AGPATH="$HOME"/.ssh/$(hostname).agent
112 
113 	[[ -f $AGPATH ]] && source $AGPATH
114 }
115 
116 function mkcd()
117 {
118 	[[ $1 ]] || return 0
119 	[[ -d $1 ]] || mkdir -vp "$1"
120 	[[ -d $1 ]] && builtin cd "$1"
121 }
122 
123 function cget()
124 {
125 	curl -OL --compressed "$@"
126 }
127 
128 # Show infos about my external IP address
129 function showmyipaddress
130 {
131 	echo "My external IPv4 : $(curl -s -4 icanhazip.com)"
132 	echo "My external IPv6 : $(curl -s -6 icanhazip.com)"
133 	echo "My external PTR  : $(curl -s icanhazptr.com)"
134 } 
135 
136 # Show info about hostname or IP address
137 function ipif()
138 {
139 		if grep -P "(([1-9]\d{0,2})\.){3}(?2)" <<< "$1"
140 		then
141 			curl ipinfo.io/"$1"
142 		else
143 			local ipadd=$(host "$1") &&
144 			local ipawk=$(awk '{ print $4 }' <<< "$ipadd")
145 			curl ipinfo.io/"$ipawk"
146 		fi
147 		echo
148 }
149 
150 function calc()
151 {
152 	echo "scale=3;$@" | bc -l
153 }
154 
155 function cds()
156 {
157 	cd "$1" && ls -la
158 }
159 
160 function netmnt()
161 {
162 	ndcli show ip $(dig +short $1) | grep "^pool:" | cut -d':' -f2 | xargs ndcli show pool
163 }
164 
165 function whonet()
166 {
167 	ndcli show ip $1 | grep "^pool:" | cut -d':' -f2 | xargs ndcli show pool
168 }
169 
170 # http://jeroenjanssens.com/2013/08/16/quickly-navigate-your-filesystem-from-the-command-line.html
171 
172 export MARKPATH=$HOME/.marks
173 function jump {
174     cd -P "$MARKPATH/$1" 2>/dev/null || echo "No such mark: $1"
175 }
176 function mark {
177     mkdir -p "$MARKPATH"; ln -s "$(pwd)" "$MARKPATH/$1"
178 }
179 function unmark {
180     rm -i "$MARKPATH/$1"
181 }
182 function marks {
183     ls -l "$MARKPATH" | sed 's/  / /g' | cut -d' ' -f9- | sed 's/ -/\t-/g' && echo
184 }
185