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Full Discussion: Check output of command before outputing and keep exit code
Top Forums UNIX for Beginners Questions & Answers Check output of command before outputing and keep exit code Post 302984405 by SkySmart on Tuesday 25th of October 2016 02:49:48 PM
Old 10-25-2016
Quote:
Originally Posted by MadeInGermany
Please avoid cat |!
Should be either
Code:
sh myscript.sh

or
Code:
sh < myscript.sh

or
Code:
< myscript.sh sh

Dito with perl.
--
In the shell the $? exit status is from the last command in the pipe chain.
If you want to get the exit status from the first command,
in standard shell you can save the output
Code:
saved_output=`sh myscript.sh`
EXITCODE=$?
printf "%s\n" "$saved_output" | awk '...'
echo $EXITCODE

In bash each command in a pipe chain is saved in the PIPESTATUS array
Code:
sh myscript.sh | awk '...'
echo ${PIPESTATUS[0]}

im not actually using cat. the cat is used to illustrate the script that is being piped from another program.

but in your examples, this scenario seems to be the most viable:

Code:
saved_output=`echo "${MYSCRIPT}" | sh`
EXITCODE=$?
echo "$saved_output" | awk '!/PatternToSearchFor/'
echo $EXITCODE

thank you for this.
however, i'm wondering if there's a shorter way to do this? less echos? possibly do it all with awk?
 

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LEARN ABOUT SUSE

irsend

IRSEND(1)								FSF								 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 0.8.7pre1						     May 2010								 IRSEND(1)
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