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Full Discussion: Perl script running multiple commands at once
Top Forums Shell Programming and Scripting Perl script running multiple commands at once Post 302940224 by bacarrdy on Thursday 2nd of April 2015 08:37:22 AM
Old 04-02-2015
Hi,

i dont know it is that what you want, but easy way to do it is:
you can try run everything in background with outputs to files (for exmpl first line> file all other lines >> file last line >> end) and then create loop to collect info from created files and if you want loop till all files got end
 

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LEARN ABOUT CENTOS

g3cat

g3cat(1)						       mgetty+sendfax manual							  g3cat(1)

NAME

       g3cat - concatenate multiple g3 documents

SYNOPSIS

       g3cat [-l] [-a] g3-file1 ...

DESCRIPTION

       g3cat  concatenates  g3	files.	These can either be 'raw', that is, bitmaps packed according to the CCITT T.4 standard for one-dimensional
       bitmap encoding, or 'digifax' files, created by GNU's GhostScript package with the digifax drivers. Its output is a  concatenation  of  all
       the input files, in raw G3 format, with two white lines in between.

       If a - is given as input file, stdin is used.

       If the input data is malformed, a warning is printed to stderr, and the output file will have a blank line at this place.

OPTIONS

       -l     separate files with a one-pixel wide black line.

       -h <blank lines>
	      specifies the number of blank lines g3cat should prepend to each page. Default is 0.

       -L <lines>
	      limit lenght of output page to maximum <lines> lines.

SPECIAL-CASE OPTIONS
       -w <width>
	      specifies  the  desired  page width in pixels per line. Default is 1728 PELs, and this is mandatory if you want to send the fax to a
	      standard fax machine.  If one of the input files doesn't match this line width (for example because it was created by  a	broken	G3
	      creator), a warning is printed, and the line width is transparently fixed.

       -a     byte-align the end-of-line codes (EOL) in the file. Every EOL will end at a byte boundary, that is, with a  01 byte.

       -p <pad>
	      specifies a minimum number of bytes that each output line must be padded to.  Padding is done with 0-bits before the EOL code.

       -R     suppress output of end-of-page code (RTC).

Example
       The following example will put a header line on a given g3 page, 'page1' and put the result into 'page2':

       echo '$header' | pbmtext | pbm2g3 | g3cat - page1 >page2

FILES

       --

BUGS

       Hopefully none :-).

SEE ALSO

       g32pbm(1), sendfax(8), faxspool(1)

AUTHORS

       g3cat is Copyright (C) 1993 by Gert Doering, <gert@greenie.muc.de>

greenie 							     27 Oct 93								  g3cat(1)
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