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Full Discussion: Add line with data to existing file
Top Forums UNIX for Dummies Questions & Answers Add line with data to existing file Post 302285609 by avronius on Monday 9th of February 2009 10:17:12 AM
Old 02-09-2009
Here's the code in sh (bourne)
Code:
#!/usr/bin/sh

FILE="/path_to_file/appointments"

COL1=$1
COL2=$2
COL3=$3

if [ -f $FILE ]
then
   echo "$COL1\t$COL2\t$COL3\t" >> $FILE
else
   echo "File \"$FILE\" not found "
   exit 0
fi
exit 0

You'll probably want to:
1. add some error handling for when users don't provide three variables.
2. if you change this script to bash, you'll need to replace \t
3. add some usage message for the users.

It could be simplified to replace "$COL1" with $1, $COL2 with $2, $COL3 with $3 - but you probably want to know what is going on...
 

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LEARN ABOUT DEBIAN

moon-buggy

moon-buggy(6)							   Games Manual 						     moon-buggy(6)

NAME

       moon-buggy - drive some car across the moon

SYNOPSIS

       moon-buggy [-hnsV] [--help] [--no-title] [--show-scores] [--version]

DESCRIPTION

       Moon-buggy  is  a simple character graphics game, where you drive some kind of car across the moon's surface.  Unfortunately there are dan-
       gerous craters there.  Fortunately your car can jump over them!

OPTIONS

       The program understands the following command line options.

       -h, --help
	      shows a short usage message.

       -m, --mesg
	      disable write access to your terminal by other users, so your boss can't disturb your game play with the help of	"write"  or  "fin-
	      ger".

       -n, --no-title
	      skips the title screen.

       -s, --show-scores
	      shows the current highscore list and exits.

       -V, --version
	      prints the program's version to standard output and exits.

KEYS

       The  moon-buggy	is  controlled	by  a couple of keys, which are described near the bottom of the screen.  Most important are the following
       keys.

       SPC, j makes your car jump.  The length of a jump is fixed and you can only start a new jump, while the wheels have contact to the ground.

       a, l   fires the mining laser.  The laser is used to remove stones, which may block your way.

       q      quits the game prematurely.  But you still keep your score and may enter the highscore list.

FILES

       The following files on your system are related to moon-buggy.

       /usr/games/moon-buggy
	      the moon-buggy executable.

       /var/games/moon-buggy/mbscore
	      the global score file

       $HOME/.mbscore
	      the local score file.  This is used, if moon-buggy has no write access to the global score file.

SEE ALSO

       Moon-buggy Usage and Maintenance by Jochen Voss.

COPYING

       Copyright (C) 2004  Jochen Voss

       Moon-buggy is free software.  Read the file COPYING of the source code distribution for details or press 'c' at moon-buggy's title screen.

AUTHOR

       The program moon-buggy was implemented by Jochen Voss (voss@seehuhn.de).

moon-buggy 1.0.51+esd						    Dec 27 2004 						     moon-buggy(6)
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