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Full Discussion: bc syntax error due to sed
Top Forums Shell Programming and Scripting bc syntax error due to sed Post 302508042 by ezitoc on Friday 25th of March 2011 01:47:12 PM
Old 03-25-2011
bc syntax error due to sed

Hi all,

before posting this questions i have looked up and found similar cases as the one i have but none of them had the answer i was lookink for.

i have the next two commands (with their corresponding output)

Code:
e1=$(grep KCAL input.OUT | sed 's/          FINAL HEAT OF FORMATION =        //g' | sed 's/ KCAL/0/g')
printf "%s\n" "Energia para configuracion 1= $e1 KCAL"
Energia para configuracion 1= -16.888990 KCAL

Code:
e2=$(grep KCAL input.OUT | sed 's/          FINAL HEAT OF FORMATION =        //g' | sed 's/ KCAL/0/g')
printf "%s\n" "Energia para configuracion 2= $e2 KCAL"
Energia para configuracion 2= -25.709240 KCAL

As you can see these two commands are correct, so $e1 and $e2 are actually numbers.

The problem is when i do the following:

Code:
scale="scale=6"
de=$(echo "$scale;$e2-$e1" | bc -l)
echo $de

i get the next error:

Code:
(standard_in) 1: syntax error

what i have found is that the sed output (or grep, certainly i'm not sure which of the two) is not compatible for a bc calculation; but i didn't find a solution for this. Perhaps the problem is not the one i think it should be.

Any suggestions would be apreciated. (Sorry for my english)
 

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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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