Regexp tip Post: 302456193

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Top Forums Shell Programming and Scripting Regexp tip Post 302456193 by Corona688 on Thursday 23rd of September 2010 12:17:36 PM

09-23-2010

Registered User

I'm not sure what you're trying to do with \s. Is that Perl syntax? It's not in POSIX regular expressions.

Remember that the 's/this/that/' syntax replaces the text it matches. It doesn't put any bit of 'this' back into 'that'. If you have GNU sed, and enable backreferences with the -r flag, you can put brackets around parts you want to match and substitute them in the output string with \1, \2, etc.

That won't help you translate 'a' to '1', though. (I'm not sure from where you're pulling these numbers, either.) The replacements you want are complex: Split a line into elements, for each element match something, read it in, translate it to a number, insert in front... A language like awk would probably be more appropriate than a regex tool like sed.

---------- Post updated at 10:17 AM ---------- Previous update was at 10:06 AM ----------

Think I see better what you're trying to do. sed can do part of it.

Code:

$ echo a s d f | sed -r 's/[ ]+/ \& /g'
a & s & d & f
$

[ ]+: match one or more spaces
\& : replace with space, ampersand, space
g: match multiple times per line if possible

You need the -r flag to match "one or more" with + like that. It could be GNU sed only.

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phones

phones(4)                                                          File Formats                                                          phones(4)

NAME

       phones - remote host phone number database

SYNOPSIS

       /etc/phones

DESCRIPTION

       The  file /etc/phones contains the system-wide private phone numbers for the tip(1) program. /etc/phones is normally unreadable, and so may
       contain privileged information.  The format of /etc/phones is a series of lines of the form:

       <system-name>[ 	]*<phone-number>.

       The system name is one of those defined in the remote(4) file and the phone number is constructed from [0123456789-=*%]. The  `='  and  `*'
       characters  are  indicators  to  the auto call units to pause and wait for a second dial tone (when going through an exchange).  The `=' is
       required by the DF02-AC and the `*' is required by the BIZCOMP 1030.

       Comment lines are lines containing a `#' sign in the first column of the line.

       Only one phone number per line is permitted. However, if more than one line in the file contains the same system name tip(1)  will  attempt
       to dial each one in turn, until it establishes a connection.

FILES

       /etc/phones

SEE ALSO

       tip(1), remote(4)

SunOS 5.10                                                          14 Jan 1992                                                          phones(4)