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Full Discussion: How to read one row at time using shell script?
Top Forums Shell Programming and Scripting How to read one row at time using shell script? Post 302979792 by RudiC on Friday 19th of August 2016 04:51:15 AM
Old 08-19-2016
Try also

Code:
{ read X; while read SD US HN WM CM CC X
 do cat <<EOF
define service{
        service_description        $SD
        use        $US
        host name  $HN
        check_command      check_ssh_disk!${WM}!${CM}!$CC
}
EOF
        done; } < file
define service{
	 service_description	disk-usage-tmp
	 use	generic-service
	 host name	test1
	 check_command	check_ssh_disk!80!90!/tmp
}
define service{
	 service_description	disk-usage-var
	 use	generic-service
	 host name	test1
	 check_command	check_ssh_disk!80!90!/var
}
define service{
	 service_description	disk-usage-data
	 use	generic-service
	 host name	test1
	 check_command	check_ssh_disk!80!90!/data
}

@wbport: On my linux system, line closes stdin after reading one single line of text, so your proposal in post#2 will enter an infinite loop...
This User Gave Thanks to RudiC For This Post:
ghpradeep
 

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cat

CAT(1)								   User Commands							    CAT(1)

NAME

       cat - concatenate files and print on the standard output

SYNOPSIS

       cat [OPTION]... [FILE]...

DESCRIPTION

       Concatenate FILE(s), or standard input, to standard output.

       -A, --show-all
	      equivalent to -vET

       -b, --number-nonblank
	      number nonempty output lines, overrides -n

       -e     equivalent to -vE

       -E, --show-ends
	      display $ at end of each line

       -n, --number
	      number all output lines

       -s, --squeeze-blank
	      suppress repeated empty output lines

       -t     equivalent to -vT

       -T, --show-tabs
	      display TAB characters as ^I

       -u     (ignored)

       -v, --show-nonprinting
	      use ^ and M- notation, except for LFD and TAB

       --help display this help and exit

       --version
	      output version information and exit

       With no FILE, or when FILE is -, read standard input.

EXAMPLES

       cat f - g
	      Output f's contents, then standard input, then g's contents.

       cat    Copy standard input to standard output.

       GNU coreutils online help: <http://www.gnu.org/software/coreutils/> Report cat translation bugs to <http://translationproject.org/team/>

AUTHOR

       Written by Torbjorn Granlund and Richard M. Stallman.

COPYRIGHT

       Copyright (C) 2013 Free Software Foundation, Inc.  License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
       This is free software: you are free to change and redistribute it.  There is NO WARRANTY, to the extent permitted by law.

SEE ALSO

       tac(1)

       The  full  documentation  for cat is maintained as a Texinfo manual.  If the info and cat programs are properly installed at your site, the
       command

	      info coreutils 'cat invocation'

       should give you access to the complete manual.

GNU coreutils 8.22						     June 2014								    CAT(1)
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