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Top Forums Shell Programming and Scripting Sed to print a string until the second occurrence of a character Post 302367084 by imr on Sunday 1st of November 2009 06:27:00 AM
Old 11-01-2009
Sed to print a string until the second occurrence of a character

Hi, I am totally new to shell scripting.

I have a String "c:\working\html\index.txt.12-12-2009.bkp" I want to check if the string has more than one "." character. If it does I would like to retrieve only "c:\working\html\index.txt" i.e, discard the second occurrence of "." and the rest of the string, using Sed command.

The closest I could get to is the following Sed command.

$ echo "c:\working\html\index.txt.12-12-2009.bkp" | sed 's/.*[.]//'
result -> bkp

but it seems sed works from right to left of the string and so finds the last occurrence of the "." returning bkp.

I am using Cygwin to run these commands.
Sed version is "GNU sed version 4.1.5"
bash version si "GNU bash, version 3.2.49(22)-release (i686-pc-cygwin)"

TIA. imr
 

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VM(1)								      mgetty								     VM(1)

NAME
vm - VoiceModem is the program for handling the voice modem functionality from shell scripts ACTIONS
beep options [<frequency [<length in 0.001sec>]]> diagnostics options device name (e.g. ttyS2 dial options phone number help play options [<file names]+> record options file name shell options [<shell script [shell options]]> wait options [<time in seconds]> devicetest OPTIONS
-c n use compression type n -d n set i/o device -t, -m, -i, -e, -s, -H equals to -d <2,3,4,5,6,7> -l s set device string (e.g. -l ttyS2:ttyC0) -v verbose output -w use off / on hook signal from local handset to start and stop recording -x n set debug level -L n set maximum recording length in sec -P print first DTMF tone on stdout and exit -R read and print DTMF string on stdout and exit -S s set default shell for shell scripts (e.g. -S /bin/sh) -T n set silence timeout in 0.1sec -V n set silence threshold to <n> (0-100%%) SEE ALSO
vgetty(1) POD ERRORS
Hey! The above document had some coding errors, which are explained below: Around line 30: You forgot a '=back' before '=head1' Around line 32: '=item' outside of any '=over' Around line 71: You forgot a '=back' before '=head1' perl v5.10.1 2010-04-04 VM(1)
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