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Full Discussion: if-statement troubles
Top Forums Shell Programming and Scripting if-statement troubles Post 302341769 by doc.arne on Thursday 6th of August 2009 02:36:11 PM
Old 08-06-2009
if-statement troubles

I try to compare the day and month of someones birthday with the day and month of today, so my little bash script can send a mail to the person that has its birthday that day.

The first line of the file birthdays looks like this:
firstname,lastname,01/01/1990,....

The variable birthday's value is: 01/01
The variable today's value is: 06/08

Yet when i compare them in the if statement you see below, he still executes the commands in the if-block as if the two values were the same.

I tried to change my if statement in a million ways but my output always is "Happy birthday".

Can someone try to explain why this if statement doesnt work?

Code:
cat birthdays | while read line; do
birthday=`echo $line | sed 's/^.*,.*,\(..\/..\)\/.*$/\1/g'`
today=`date '+%d/%m'`
if [ $today=$birthday ]
then
echo "Happy birthday"
echo ""
fi



---------- Post updated at 01:36 PM ---------- Previous update was at 01:35 PM ----------

and of course my code ends with "done"
 

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calendar(1)						      General Commands Manual						       calendar(1)

Name
       calendar - calendar reminder service

Syntax
       calendar [-]

Description
       The  command  consults the file `calendar' in the current directory and prints out lines that contain today's or tomorrow's date.  The com-
       mand recognizes most month-day dates, such as Dec. 7, december 7, 12/7, but it does not recognize dates formatted in the following ways:  7
       December  or  7/12.  If you give the month as * with a date, such as, * 1, that day in any month will do.  On weekends, specifying tomorrow
       extends through Monday.

       When an argument is present, the command searches through a user's calendar file in his login directory and sends him any positive  results
       by Normally this is done daily under control of

       The  calendar  file  is	first  run  through  the  C  preprocessor, to include any other calendar files specified with the #include syntax.
       Included calendars are shared by all users, and are maintained and documented by the local administration.

Options
       -    Functions for every user who has a calendar file in his login directory.

Restrictions
       The extended idea of tomorrow does not account for holidays.

Files
       calendar
       /usr/lib/calendar to figure out today's and tomorrow's dates
       /etc/passwd
       /tmp/cal*
       /lib/cpp, egrep, sed, mail as subprocesses

See Also
       at(1), cron(8), mail(1)

																       calendar(1)
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