How to test a parameter match a regexp rule?

07/12/2006, 04h04

Hi all

For example:
./test.sh 123456 abcedf

so I want there's a test mechanism of parameter.

for testing if 123456 match rule of input.

if not match ,then echo error and exit.

so I think using regexp is an idea.
and how?

thank you very much
your key9

07/12/2006, 04h50

On 2006-12-07, Key9 wrote:
> Hi all
>
> For example:
> ./test.sh 123456 abcedf
>
> so I want there's a test mechanism of parameter.
>
> for testing if 123456 match rule of input.
>
> if not match ,then echo error and exit.
>
>
> so I think using regexp is an idea.
> and how?

It depends on what you want to match. If it's a string:

if [ "$1" = "teststring" ]; then

If it's a file globbing pattern:

case $1 in
1*6) ;; ## If $1 starts with 1 and ends with 6
*) exit 5 ;; If not, exit with error
esac

If it has to be a regular expression, you can use expr, or in some
shells (e.g., bash3):

if [[ $1 ~ REGEXP ]]; then

--
Chris F.A. Johnson, author <http://cfaj.freeshell.org/shell>
Shell Scripting Recipes: A Problem-Solution Approach (2005, Apress)
===== My code in this post, if any, assumes the POSIX locale
===== and is released under the GNU General Public Licence

07/12/2006, 04h57

>
> if [[ $1 ~ REGEXP ]]; then
>
oh man , I don't know I can using this directly:-)
In my mind , I have to run some app and test it's return.

Thank you very much!

07/12/2006, 09h36

Key9 wrote:
> >
> > if [[ $1 ~ REGEXP ]]; then
> >
> oh man , I don't know I can using this directly:-)

It's as non-portable as the ksh variant...

if [[ $1 = pattern ]]; then

Use 'case' for portability...

case $1 in (pattern) ... ; esac

Janis

> In my mind , I have to run some app and test it's return.
>
> Thank you very much!

07/12/2006, 09h36

2006-12-7, 01:36(-08), Janis:
> Key9 wrote:
>> >
>> > if [[ $1 ~ REGEXP ]]; then
>> >
>> oh man , I don't know I can using this directly:-)
>
> It's as non-portable as the ksh variant...
>
> if [[ $1 = pattern ]]; then
>
> Use 'case' for portability...
>
> case $1 in (pattern) ... ; esac
[...]

case $1 in pattern) ... ; esac

will even be portable to the Bourne shell in case you might need
that level of portability.

--
Stéphane

07/12/2006, 04h04	#1
Key9 Messages: n/a Hébergeur:	How to test a parameter match a regexp rule? Hi all For example: ./test.sh 123456 abcedf so I want there's a test mechanism of parameter. for testing if 123456 match rule of input. if not match ,then echo error and exit. so I think using regexp is an idea. and how? thank you very much your key9

07/12/2006, 04h50	#2
Chris F.A. Johnson Messages: n/a Hébergeur:	Re: How to test a parameter match a regexp rule? On 2006-12-07, Key9 wrote: > Hi all > > For example: > ./test.sh 123456 abcedf > > so I want there's a test mechanism of parameter. > > for testing if 123456 match rule of input. > > if not match ,then echo error and exit. > > > so I think using regexp is an idea. > and how? It depends on what you want to match. If it's a string: if [ "$1" = "teststring" ]; then If it's a file globbing pattern: case $1 in 16) ;; ## If $1 starts with 1 and ends with 6 ) exit 5 ;; If not, exit with error esac If it has to be a regular expression, you can use expr, or in some shells (e.g., bash3): if [[ $1 ~ REGEXP ]]; then -- Chris F.A. Johnson, author <http://cfaj.freeshell.org/shell> Shell Scripting Recipes: A Problem-Solution Approach (2005, Apress) ===== My code in this post, if any, assumes the POSIX locale ===== and is released under the GNU General Public Licence

07/12/2006, 04h57	#3
Key9 Messages: n/a Hébergeur:	Re: How to test a parameter match a regexp rule? > > if [[ $1 ~ REGEXP ]]; then > oh man , I don't know I can using this directly:-) In my mind , I have to run some app and test it's return. Thank you very much!

07/12/2006, 09h36	#4
Janis Messages: n/a Hébergeur:	Re: How to test a parameter match a regexp rule? Key9 wrote: > > > > if [[ $1 ~ REGEXP ]]; then > > > oh man , I don't know I can using this directly:-) It's as non-portable as the ksh variant... if [[ $1 = pattern ]]; then Use 'case' for portability... case $1 in (pattern) ... ; esac Janis > In my mind , I have to run some app and test it's return. > > Thank you very much!

07/12/2006, 09h36	#5
Stephane CHAZELAS Messages: n/a Hébergeur:	Re: How to test a parameter match a regexp rule? 2006-12-7, 01:36(-08), Janis: > Key9 wrote: >> > >> > if [[ $1 ~ REGEXP ]]; then >> > >> oh man , I don't know I can using this directly:-) > > It's as non-portable as the ksh variant... > > if [[ $1 = pattern ]]; then > > Use 'case' for portability... > > case $1 in (pattern) ... ; esac [...] case $1 in pattern) ... ; esac will even be portable to the Bourne shell in case you might need that level of portability. -- Stéphane

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