YASS (yet another shell script)
John Daley
aims at ssc-vax.UUCP
Tue Mar 11 06:34:32 AEST 1986
This is a 'simple' little shell script I whipped up, out of need, to
print a specific line of a specific file. Yes, I chose to use the B
shell, but it gets the job done, right?.
Why am I posting such a meager little script? This newsgroup hasn't
been very active lately (excluding discussions). Anybody out there
got a better way to do what my script does?
Any tips on error-trapping? Any good scripts out there? Hello?
--- CUT HERE --- CUT HERE --- CUT HERE --- CUT HERE --- CUT HERE ---
#!/bin/sh
#
# Script: /usr/local/line
#
# Author: Ray E. Saddler III
# Ballistic Systems Division
# Computer Aided Design Support and Administration
# Boeing Aerospace Company Scientific Systems
#
# Created: 86-03-10 Ray
#
# Enhanced: YY-MM-DD XYZ
#
# Purpose: Print a specified line of a specified file.
#
#########1#########2#########3#########4#########5#########6#########7#########8
#
# Print opening messages - syntax check
#
while test $# -ne 2
do
case $1 in
*)
echo "Usage: line [line number] [file name]"
exit 0
continue
esac
continue
done
#
# If file ($2) does not exist - ABORT
#
if test -f $2
then
continue
else
echo "File: $2 not found"
exit 0
continue
fi
#
# Delete scratch file: /tmp/LINE_COUNT if it exists
#
if test -f /tmp/LINE_COUNT
then
rm /tmp/LINE_COUNT
else
continue
continue
fi
#
# Count how many lines exist in file ($2) - record in /tmp/LINE_COUNT
#
WORD_COUNT=`wc -l $2`
for DATA in `echo $WORD_COUNT`
do
echo $DATA>>/tmp/LINE_COUNT
continue
done
#
# Set LINE_COUNT buffer to the value of line #1 in file: /tmp/LINE_COUNT
#
LINE_COUNT=`head -1 /tmp/LINE_COUNT`
#
# If the value of $1 exceeds the line count of $2 - ABORT
#
if [ $1 -gt $LINE_COUNT ]
then
echo "Unable to print line $1, $2 has only $LINE_COUNT lines."
exit 0
else
continue
continue
fi
#
# All systems go - find line $1 in file $2
#
head -$1 $2 | tail -1
#
# End of executable code
#
#########1#########2#########3#########4#########5#########6#########7#########8
--- CUT HERE --- CUT HERE --- CUT HERE --- CUT HERE --- CUT HERE --- CUT HERE --
(BTW - excluding error traps & comments this could be reduced to:
head -$1 $2 | tail -1)
P.S.
Anybody out there gotta public domain program that graphically (sp?) displays
the status of a disk (i.e. available/used blocks/sectors etc?)
--
################################################################################
# Ray E. Saddler III @ Boeing Aerospace Company - Ballistic Systems Division #
# Tech. Applications CAD Support and Administration - BAC Scientfic Systems #
# Seattle, Washington (vacation spot of the stars) USA, Earth, lost in space #
################################################################################
Disclaimer: The Boeing Company shall not be held responsible for damage caused
by fire, in the event I should spontaneously (sp?) combust. G'-day.
Quote: "" - unknown
More information about the Comp.sources.unix
mailing list