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Top Forums Shell Programming and Scripting Common prefix of a list of strings Post 302867685 by RudiC on Thursday 24th of October 2013 04:47:09 PM
Old 10-24-2013
Not sure if this should be considered more elegant, and it doesn't take into account field separators, but it would do the first job:
Code:
 A=(aaa_b_cc aaa_b_cc_ddd aaa_b_cc aaa_b_cd)
for ((i=1;i<=${#A[0]}; i++))                            # for the entire first string
  do for ((j=0;j<${#A[@]};j++))                         # for all strngs in array
       do P=${A%${A[0]:$i}}                             # get increasing length substring
          [ "${A[$j]#$P}" = "${A[$j]}" ] && break 2     # test if contained in all strings; if not, no CP, break out
       done
     CP=$P                                              # keep last valid common prefix
  done
echo $CP
aaa_b_c

This User Gave Thanks to RudiC For This Post:
 

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faxrm(1)						       mgetty+sendfax manual							  faxrm(1)

NAME
faxrm - remove fax jobs queued by faxspool(1) SYNOPSIS
faxrm [-i] [job-ids...] DESCRIPTION
Remove job(s) from the fax queue set up by faxspool(1). faxrm removes queued fax jobs. Call with a list of job-IDs to remove specific jobs. Call with no job IDs to be asked interactively about all jobs you own (if run by root, all jobs). For job-id, use the strings returned by faxq(1) (e.g. F000015), without the ``/JOB'' exten- tion. If you are not the owner of the fax job (as per the 'user xyz' statement inside the JOB file), you are not allowed to remove the fax job. Only root is permitted to remove another user's faxes. If the job is locked (most likely because sendfax(8) is active sending it), faxrm doesn't attempt to remove it. Instead, it prints a warn- ing message on stderr and goes on to the next job. EXAMPLES
faxrm F000005 F000033 OPTIONS
-i (interactive mode) Tells faxrm to ask for confirmation before removing the job (UNIMPLEMENTED). BUGS
faxrm doesn't return diagnostic exit codes yet. SEE ALSO
faxrunq(1), faxrunq(8), faxspool(1), faxq(1), faxqueue(5) AUTHOR
faxrm is Copyright (C) 1993-2002 by Gert Doering, <gert@greenie.muc.de>. greenie 23 Nov 02 faxrm(1)
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