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Top Forums Shell Programming and Scripting Replace date on a line with current date Post 302715291 by jakSun8 on Sunday 14th of October 2012 11:17:03 AM
Old 10-14-2012
Replace date on a line with current date

Hi Guys,
I have a file with following content

Code:
From 20121014 : To 20121014
Number of days : 1 
1234
1245
1246
1111

Everyday i run my script i want to modify "To" date on the first line with current date. I have set the current date in script as

Code:
RUN_DATE=`date -u +%Y%m%d`

So i want to replace "To" date with $RUN_DATE. The "From" date never changes.
Also, i want to replace on second line (toDate-fromDate)+1. Right now it is 1. So when it runs tomorrow it should be 2.
Thanks - jak
 

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TCAL(1) 						      General Commands Manual							   TCAL(1)

NAME
Tcal - runs the Gcal program with the date of tomorrow's day. SYNOPSIS
tcal [--help | --version] | [--shift=[+|-]number] [Argument...] DESCRIPTION
Tcal is a program which runs gcal with a date set one day ahead (equivalent the --shift=1 option). All given arguments are passed unmodi- fied to the Gcal program. If the Gcal program shall be called with another date than tomorrow's date, this desired date can be selected by using the --shift=[+|-]number option, in which [+|-]number is the distance of days the desired date is distant from the actual date (works only for Gregorian years). The --shift option must be given before all other arguments which are passed to the Gcal program. An exit status of 0 means all processing is successfully done, any other value means an error has occured. OPTIONS
--help Print a usage message listing all available options, then exit successfully. --version Print the version number, then exit successfully. --shift=[+|-]number Define the displacement in [+|-]number days the desired date is distant from the actual date. ENVIRONMENT
GCALPROG The GCALPROG environment variable contains the file name of the executable Gcal program, which is used by Tcal to call Gcal. This takes precedence over the file name `gcal', which is burned-in during the compilation step of tcal. COPYRIGHT
Tcal Copyright (c) 1995, 96, 1997, 2000 Thomas Esken This software doesn't claim completeness, correctness or usability. On principle I will not be liable for any damages or losses (implicit or explicit), which result from using or handling my software. If you use this software, you agree without any exception to this agree- ment, which binds you LEGALLY !! Tcal is free software and distributed under the terms of the `GNU General Public License'; published by the `Free Software Foundation'; version 2 or (at your option) any later version. Any suggestions, improvements, extensions, bug reports, donations, proposals for contract work, and so forth are welcome! If you like this tool, I'd appreciate a postcard from you! Enjoy it =8^) AUTHOR
------------------------oOO \\_''/ OOo--------------------------- Thomas Esken O (/o-o) O eMail: esken@gmx.net Im Hagenfeld 84 (( ^ )) Phone: +49 251 232585 D-48147 Muenster; Germany \____) ~ (____/ MotD : 2old2live, 2young2die SEE ALSO
gcal(1), txt2gcal(1), gcal2txt(1). June 14, 2000 TCAL(1)
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