ksh: The shortest check if "program" exist (on current PATH)?

[ogniemi]

I wold like to replace:

type lsof >/dev/null 2>&1 && ( [ $? -eq 0 ] && echo is ) || echo is not

with the shorter method - getting exit code of "type" directly in [ ...... ] - [ GETEXITCODE_of`type lsof >/dev/null 2>&1' -eq 0 ] && ....


thx in advance,
rm.

 

[ogniemi]

[ `type llsof >/dev/null 2>&1;echo $?` -eq 0 ] && echo is || echo is not

maybe shorter test?

 

[feherke]

Hi

Why the [tt]echo[/tt] part ?

type "lsof" >/dev/null 2>&1 && echo is || echo is not

Feherke.

http://rootshell.be/~feherke/

 

[PHV]

And what about this ?
[ -z "$(whence lsof)" ] && echo is not || echo is

Hope This Helps, PH.
Want to get great answers to your Tek-Tips questions? Have a look at FAQ219-2884 or FAQ181-2886

 

[stefanwagner]

whence?

which lsof > /dev/null && echo is || echo is not

seeking a job as java-programmer in Berlin:

http://home.arcor.de/hirnstrom/bewerbung

 

[PHV]

whence?
The thread title clearly say that the OP uses ksh.

[tt]whence [ -pv ] name ...
For each name, indicate how it would be interpreted if
used as a command name.
whence accepts the following options:
-v
Produce a more verbose report.
-p
Do a path search for name even if name is an alias, a
function, or a reserved word.[/tt]

Hope This Helps, PH.
Want to get great answers to your Tek-Tips questions? Have a look at FAQ219-2884 or FAQ181-2886

 

[stefanwagner]

The thread title clearly say that the OP uses ksh.

sorry - not recognized

seeking a job as java-programmer in Berlin:

http://home.arcor.de/hirnstrom/bewerbung