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Full Discussion: if-statement troubles
Top Forums Shell Programming and Scripting if-statement troubles Post 302342119 by kshji on Friday 7th of August 2009 12:27:51 PM
Old 08-07-2009
Test (=[) is builtin command = not bracket. Usually two mistakes using test command:
  • variable is empty => no argument => error
  • no argument separator between arguments - it's commandline, not programlanguage testing with brackets.

Solution: make always string = string length 0 is something = good argument and remember argument delimeters. Ex. in this case test command need 4 arguments: value operator value ]

If you use test command using test (not [ ), then you don't need last argument ].
Yes little funny, but command is exactly the same.

Generic solution for shells (sh, bsh, ksh, bash, zsh, ...):
Code:
[  "$today"  =  "$birthday"  ] 
#or
test  "$today"  =  "$birthday"

more testing

---------- Post updated at 07:27 PM ---------- Previous update was at 07:23 PM ----------

There are also some other test commands, [[ and ((. Syntax are little different as [ / test.
 

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CALENDAR(1)						      General Commands Manual						       CALENDAR(1)

NAME
calendar - reminder service SYNOPSIS
calendar [ - ] DESCRIPTION
Calendar consults the file `calendar' in the current directory and prints out lines that contain today's or tomorrow's date anywhere in the line. Most reasonable month-day dates such as `Dec. 7,' `december 7,' `12/7,' etc., are recognized, but not `7 December' or `7/12'. If you give the month as ``*'' with a date, i.e. ``* 1'', that day in any month will do. On weekends `tomorrow' extends through Monday. When an argument is present, calendar does its job for every user who has a file `calendar' in his login directory and sends him any posi- tive results by mail(1). Normally this is done daily in the wee hours under control of cron(8). The file `calendar' is first run through the ``C'' preprocessor, /lib/cpp, to include any other calendar files specified with the usual ``#include'' syntax. Included calendars will usually be shared by all users, maintained and documented by the local administration. FILES
calendar /usr/libexec/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) BUGS
Calendar's extended idea of `tomorrow' doesn't account for holidays. 7th Edition October 21, 1996 CALENDAR(1)
All times are GMT -4. The time now is 07:00 PM.
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