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Full Discussion: return value of a function
Top Forums Shell Programming and Scripting return value of a function Post 302331315 by fl0r10 on Sunday 5th of July 2009 07:37:39 PM
Old 07-05-2009
return value of a function

I have write a shell function to get the maximum of a vector.
However, the returned value from the function is not always
the correct one.

Here is the script:

Code:
maxval()
{
local max j i size arrval
size=$1 ; shift
max=-999999999
i=0
while [ $i -lt $size ]
do
 arrval="$1"
 if [ $max -le $arrval ]
 then
  max=$arrval
 fi
 shift
 let i=i+1
done
mvvv=$max
return $max
#mvvv is a global variable
}

#I am accesing mavval via:

Code:
maxval `echo ${#ind21[@]} ${ind21[@]}`

#If I try:
Code:
max2=$mvvv

# transfering via mvvv ; not sure $? does not work.....
# it works

#If I try:
Code:
max2=$?

#does not always work.

The question is: Why I am not getting the right answer when I am transfering the output of maxval function via returned $? ?

Last edited by vidyadhar85; 07-05-2009 at 10:21 PM.. Reason: code tags added
 

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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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