How to test if part of a string matches?


 
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# 8  
Old 10-17-2009
Quote:
Originally Posted by wolfv
Or what key words can I google to read about the syntax?
parameter expansion (bash/ksh/sh)
# 9  
Old 10-17-2009
Quote:
Originally Posted by wolfv
Thank you for the wide range of solutions. But what shell are you using? I am using borne shell.
Hi wolfv, probably your system does not use the classic Bourne Shell anymore. Most systems now have a /bin/sh that is Posix compliant with several enhancements, one of which is pattern-matching operators (a kind of parameter expansion).
# 10  
Old 10-17-2009
Question

Quote:
Originally Posted by Scrutinizer
Hi wolfv, probably your system does not use the classic Bourne Shell anymore. Most systems now have a /bin/sh that is Posix compliant with several enhancements, one of which is pattern-matching operators (a kind of parameter expansion).
Hi Scrutinizer. I am new at unix/linux. I am using sh on Ubuntu. What is the name of the sh shell?

Thank you.
# 11  
Old 10-17-2009
Hi wolfv,

It is called dash (Debian Almquist shell).

S.

Last edited by Scrutinizer; 10-17-2009 at 06:12 PM..
# 12  
Old 10-17-2009
Question

Quote:
Originally Posted by Scrutinizer
Code:
if [ "${name%.*}." = "backup." ]

Hi Scrutinzer,
I am running dash. What is the "%" for?
# 13  
Old 10-18-2009
Quote:
Originally Posted by wolfv
Hi Scrutinzer,
I am running dash. What is the "%" for?
That was answered earlier in the thread:
https://www.unix.com/shell-programmin...#post302362779

Like bash and ksh, dash is a POSIX shell.
# 14  
Old 10-18-2009
Hi wolfv, % means remove smallest suffix pattern. In this case the suffix pattern is ".*" , which means a dot followed by any amount characters. In other words, chop off the dot and any trailing characters at the end. See here.

Last edited by Scrutinizer; 10-18-2009 at 01:01 AM..
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