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Top Forums UNIX for Dummies Questions & Answers Variable "##*", "% *" meaning Post 302591386 by darocham on Thursday 19th of January 2012 10:47:53 AM
Old 01-19-2012
Variable "##*", "% *" meaning

Hi, What means "##*", "% *" in a variable??

I have this in the script that i'm reading:

...
Code:
read line

echo $line 
echo ${line#* }
echo ${line##* }
echo ${line% * }

...


The first print:
Code:
DN: RCROOT ONRM_ROOT_MO SNW ONRM_ROOT_MO BSC BSCCC2 BTS ALTOHATILLONOR

The second print:
Code:
RCROOT ONRM_ROOT_MO SNW ONRM_ROOT_MO BSC BSCCC2 BTS ALTOHATILLONOR

the third:
Code:
ALTOHATILLONOR

the fourth:
Code:
DN: RCROOT ONRM_ROOT_MO SNW ONRM_ROOT_MO BSC BSCCC2 BTS

Thx

Moderator's Comments:
Mod Comment Please use next time code tags for your code and data

Last edited by vbe; 01-19-2012 at 01:20 PM.. Reason: code tags + typos
 

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line(1) 						      General Commands Manual							   line(1)

NAME
line - Reads one line from standard input SYNOPSIS
line STANDARDS
Interfaces documented on this reference page conform to industry standards as follows: line: XCU5.0 Refer to the standards(5) reference page for more information about industry standards and associated tags. OPTIONS
None DESCRIPTION
The line command copies one line, up to and including a newline, from standard input and writes it to standard output. Use this command within a shell command file to read from your terminal. The line command always writes at least a newline character. NOTES
The line utility has no internationalization features and is marked LEGACY in XCU Issue 5. Use the read utility instead. EXIT STATUS
Success. End-of-File. EXAMPLES
To read a line from the keyboard and append it to a file, enter: echo 'Enter comments for the log:' echo ': c' line >>log This shell procedure displays the message: Enter comments for the log: It then reads a line of text from the keyboard and adds it to the end of the file log. The echo ': c' command displays a : (colon) prompt. See the echo command for information about the c escape sequence. SEE ALSO
Commands: echo(1), ksh(1), read(1), Bourne shell sh(1b), POSIX shell sh(1p) Functions: read(2) Standards: standards(5) line(1)
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