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Full Discussion: Execute commands from script in current bash session
Top Forums Shell Programming and Scripting Execute commands from script in current bash session Post 302437451 by jelloir on Thursday 15th of July 2010 06:55:34 AM
Old 07-15-2010
Execute commands from script in current bash session
I have a file as follows:

Code:
cat /etc/mxg/ssh-hosts

Code:
mx.example1.com.au:2225
mx2.example2.com.au:2225
mx.example3.com.au:2225
mail.example4.com.au:2225
mail.example5.org.au:2225
mail.example6.com.au:2225

I want to dynamically create aliases for quick access to these servers from bash. I wrote the following script as a starting point before I figure out how to have the aliases generated when I logon to bash.

Code:
cat /usr/local/bin/sshaliases.sh

Code:
#!/bin/bash

SSHHOSTS=/etc/mxg/ssh-hosts

for sshhost in $(cat $SSHHOSTS); do
        SSHALIAS=$(echo $sshhost | awk -F"." '{print $2}')
        SSHHOST=$(echo $sshhost | awk -F":" '{print $1}')
        PORTNO=$(echo $sshhost | awk -F":" '{print $2}')
        alias $SSHALIAS="ssh -p $PORTNO $SSHHOST"
done

I cannot understand or find the answer on how I export the alias line to my current shell. i.e. I need the result of the alias command to be run in my shell so the aliases are generated, e.g.

run
Code:
sshaliases.sh

(or have it run when I logon to a bash session) and then I can run...

Code:
example1

which will actually run...
Code:
ssh -p 2225 mx.example1.com.au

Additionally if anyone knows the most logical way to integrate this so it executes when I logon to bash that would also be helpful. I believe putting it in a function would work?
 

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LEARN ABOUT LINUX

irsend

IRSEND(1)							   User Commands							 IRSEND(1)

NAME

       irsend - basic LIRC program to send infra-red commands

SYNOPSIS

       irsend [options] DIRECTIVE REMOTE CODE [CODE...]

DESCRIPTION

       Asks the lircd daemon to send one or more CIR (Consumer Infra-Red) commands. This is intended for remote control of electronic devices such
       as TV boxes, HiFi sets, etc.

       DIRECTIVE can be:
	  SEND_ONCE	    - send CODE [CODE ...] once
	  SEND_START	    - start repeating CODE
	  SEND_STOP	    - stop repeating CODE
	  LIST		    - list configured remote items
	  SET_TRANSMITTERS  - set transmitters NUM [NUM ...]
	  SIMULATE	    - simulate IR event

       REMOTE is the name of a remote, as described in the lircd configuration file.

       CODE is the name of a remote control key of REMOTE, as it appears in the lircd configuration file.

       NUM is the transmitter number of the hardware device.

       For the LIST DIRECTIVE, REMOTE and/or CODE can be empty:

	  LIST	 ""    ""   - list all configured remote names
	  LIST REMOTE  ""   - list all codes of REMOTE
	  LIST REMOTE CODE  - list only CODE of REMOTE

       The SIMULATE command only works if it has been explicitly enabled in lircd.

       -h --help
	      display usage summary

       -v --version
	      display version

       -d --device
	      use given lircd socket [/var/run/lirc/lircd]

       -a --address=host[:port]
	      connect to lircd at this address

       -# --count=n
	      send command n times

EXAMPLES

	  irsend LIST DenonTuner ""
	  irsend SEND_ONCE  DenonTuner PROG-SCAN
	  irsend SEND_ONCE  OnkyoAmpli VOL-UP VOL-UP VOL-UP VOL-UP
	  irsend SEND_START OnkyoAmpli VOL-DOWN ; sleep 3
	  irsend SEND_STOP  OnkyoAmpli VOL-DOWN
	  irsend SET_TRANSMITTERS 1
	  irsend SET_TRANSMITTERS 1 3 4
	  irsend SIMULATE "0000000000000476 00 OK TECHNISAT_ST3004S"

FILES

       /etc/lirc/lircd.conf
	      Default lircd configuration file.  It should contain all the remotes, their infra-red codes and the corresponding timing	and  wave-
	      form details.

DIAGNOSTICS

       If lircd is not running (or /var/run/lirc/lircd lacks write permissions) irsend aborts with the following diagnostics:
       "irsend: could not connect to socket"
       "irsend: Connection refused" (or "Permission denied").

SEE ALSO

       The documentation for lirc is maintained as html pages. They are located under html/ in the documentation directory.

       lircd(8), mode2(1), smode2(1), xmode2(1), irrecord(1), irw(1), http://www.lirc.org.

irsend 0.9.0-pre1						   October 2010 							 IRSEND(1)
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