Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: ksh case statement
Top Forums Shell Programming and Scripting ksh case statement Post 302268964 by SFNYC on Tuesday 16th of December 2008 03:34:18 PM
Old 12-16-2008
You can try testing your date with something like this:
Code:
$  grep --version
grep (GNU grep) 2.5.1


$ echo '2008-10-10' | grep -Eq '^20[0-9]{2}-(0?[1-9]|1[0-2])-(0?[1-9]|[1-2][0-9]|3[0-1])$'

$ echo $?
0

$ echo '2008-12-16' | grep -Eq '^20[0-9]{2}-(0?[1-9]|1[0-2])-(0?[1-9]|[1-2][0-9]|3[0-1])$'

$ echo $?
0

$ echo '2008-10-99' | grep -Eq '^20[0-9]{2}-(0?[1-9]|1[0-2])-(0?[1-9]|[1-2][0-9]|3[0-1])$'

$ echo $?
1

$echo 'Hello World'  | grep -Eq '^20[0-9]{2}-(0?[1-9]|1[0-2])-(0?[1-9]|[1-2][0-9]|3[0-1])$'

$ echo $?
1

This regex also check for valid dates as best it can. Meaning, it doesn't check for leap year or stuff like 2008-02-31. To do that, I would suggest you write a more sophisitcated function for that. But this one-liner will be sufficient for most of the stuff you want.

Code:
$ echo '2008-92-10' | grep -Eq '^20[0-9]{2}-(0?[1-9]|1[0-2])-(0?[1-9]|[1-2][0-9]|3[0-1])$'

$ echo $?
1

$ echo '20081216' | grep -Eq '^20[0-9]{2}-(0?[1-9]|1[0-2])-(0?[1-9]|[1-2][0-9]|3[0-1])$'

$ echo $?
1

 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

case statement

Hi all, is it possible to create a 'dynamic' case statement. ie select option in `ls` do case satement depending on results of the above `ls` done I hope I have explained this ok! Thanks Helen (1 Reply)
Discussion started by: Bab00shka
1 Replies

2. Shell Programming and Scripting

case statement

hi all i'm writing a script and in it i need to prompt the user if the entered value is correct or not ,i wrote the following and its not working ,its executing the script even if i enter Y/N pls any help is appreciated echo "\nAre you sure you entered the right Destination Environment? y :... (5 Replies)
Discussion started by: bkan77
5 Replies

3. UNIX for Dummies Questions & Answers

If or Case Statement

I want to write a program with the following variables: a=7000 b=24000 c=613.8 The user can enter two words: Vivid or Blue for example. The challenge is that the user might not want to write the words the way they appear. The user can write V or v or vivid or Vivid or write Blue or blue, or B,... (1 Reply)
Discussion started by: Ernst
1 Replies

4. Shell Programming and Scripting

case statement

Hi all, I think i'm asking a sqtupid question here.. i'm using case sttament, what is the syntax or symbol for "or"? I thought was || here a quick sample of my case statment echo "Would you like to update your detail ?" read response case $response in ... (2 Replies)
Discussion started by: c00kie88
2 Replies

5. UNIX for Dummies Questions & Answers

CASE statement

Hi, I am writing a bash shell script. My script has a few user defined parameters. When the script runs the first thing it does is make sure that these parameters are valid. One of the parameters is called YEAR. A valid input for YEAR can be 1997-2000. One way I have come up with to ensure... (3 Replies)
Discussion started by: msb65
3 Replies

6. UNIX for Dummies Questions & Answers

case statement in UNIX scripting (ksh)

Hi, I have a script like below : #!/bin/ksh echo "Do you want to export all docs ?" read alld echo "Do you want to export template or report only " read temr case && ] #arguments ;; case && ] #arguments ;; case && ] #arguments ;; (4 Replies)
Discussion started by: luna_soleil
4 Replies

7. Shell Programming and Scripting

ksh "case" statement question

Hi I have the following case statement: case $larg in *_* ) a=${larg%_*}; b=${larg#*_}; ;; *^* ) a=${larg%^*}; b=${larg#*^}; ;; esac I cannot figure out what *_* and *^* stand for... Also what a=${larg%_*}; b=${larg#*_}; and a=${larg%^*}; b=${larg#*^}; ... (1 Reply)
Discussion started by: aoussenko
1 Replies

8. Shell Programming and Scripting

Using an array with a case statement in KSH

Hi, I'm really new ro shell scripting (actually any kind of programming) and am pretty sure I'm making a pretty basic error here but I can't for the life of me figure it out. What I'm trying to do is get an array working with a case statement in a KSH script. The code is as follows: ... (3 Replies)
Discussion started by: SReilly
3 Replies

9. UNIX for Dummies Questions & Answers

Case statement help

Hi I am new to shell scripting, I wanted to make a shell script that has a case statement asking the user to select their city 1)london 2)tokyo 3) etc., I then want the users input to be stored in a variable and echoed out in another script; so for example if the user selects tokyo, tokyo city code... (2 Replies)
Discussion started by: scriptnewbie
2 Replies

10. Shell Programming and Scripting

ksh case statement issue

Hi. I wrote the following case statement to replace a series of 'ELIF' statements as it looks better and is easier to maintain. However, for some reason the commands don't fully work in this format. Take option 1. It should call a script that runs in the background but it doesn't work. Can anyone... (3 Replies)
Discussion started by: user052009
3 Replies

LEARN ABOUT SUNOS

echo

echo(1B)					     SunOS/BSD Compatibility Package Commands						  echo(1B)

NAME

       echo - echo arguments to standard output

SYNOPSIS

       /usr/ucb/echo [-n] [argument]

DESCRIPTION

       echo writes its arguments, separated by BLANKs and terminated by a NEWLINE, to the standard output.

       echo  is useful for producing diagnostics in command files and for sending known data into a pipe, and for displaying the contents of envi-
       ronment variables.

       For example, you can use echo to determine how many subdirectories below the root directory (/) is your current directory, as follows:

	 o  echo your current-working-directory's full pathname

	 o  pipe the output through tr to translate the path's embedded slash-characters into space-characters

	 o  pipe that output through wc -w for a count of the names in your path.

	      example% /usr/bin/echo "echo $PWD | tr '/' ' ' | wc -w"

       See tr(1) and wc(1) for their functionality.

       The shells csh(1), ksh(1), and sh(1), each have an echo built-in command, which, by default, will have precedence, and will be  invoked	if
       the  user  calls  echo without a full pathname. /usr/ucb/echo and csh's echo() have an -n option, but do not understand back-slashed escape
       characters. sh's echo(), ksh's echo(), and /usr/bin/echo, on the other hand, understand the  black-slashed  escape  characters,	and  ksh's
       echo() also understands a as the audible bell character; however, these commands do not have an -n option.

OPTIONS

       -n	Do not add the NEWLINE to the output.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWscpu			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       csh(1), echo(1), ksh(1), sh(1), tr(1),  wc(1), attributes(5)

NOTES

       The -n option is a transition aid for BSD applications, and may not be supported in future  releases.

SunOS 5.10							    3 Aug 1994								  echo(1B)
All times are GMT -4. The time now is 04:14 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy