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Full Discussion: regex to match basename
Top Forums Shell Programming and Scripting regex to match basename Post 302347945 by xiamin on Thursday 27th of August 2009 03:06:34 AM
Old 08-27-2009
Hi

Thanks to all responded and the responses are also excellent at this point of time i am very keen on the regex solution

Code:
 echo /u01/Sybase/data/master.dbf | grep -o '[^/]*$'

due to my inquisitiveness in regex what does this regex do

Code:
grep -o '[^/]*$'

I know individually
^ matches begining of the line
$ matches end of the line
* matches anything
/ is a escape sequence

i dont understand what a [] does and what does the combined expression all put together mean including the greps -o switch
 

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basename(1)						      General Commands Manual						       basename(1)

Name
       basename - strip directory names from pathname

Syntax
       basename string [ suffix ]

Description
       The  command  deletes from string any prefix up to and including the last slash (/) and the suffix (if specified), and prints the result on
       the standard output.  The command handles limited regular expressions in the same manner as metacharacters must	be  escaped  if  they  are
       intended to be interpreted literally.  For example:
       % basename /vmunix .x
       vmun
       % basename /vmunix '.x'
       vmunix
       In  the	first example, returns because it interprets the as a regular expression consisting of any character followed by the letter In the
       second example, the dot is escaped; there is no match on a dot followed by and returns

       The command is often used inside substitution marks (` `) within shell procedures.

Examples
       The following example shell script compiles the file and moves the output to in the current directory:
       cc /usr/src/bin/cat.c
       mv a.out `basename $1 .c`
       The following example echoes only the base name of the file by removing the prefix and any possible sequence of	characters  following  the
       period in the file's name:
       % basename /etc/syslog.conf '..*'
       syslog

See Also
       dirname(1), ex(1), sh(1)

																       basename(1)
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