[Coco] OS9 Script Error Handling or File Testing ?

[coco at jechar.ca]

I could try

echo > /dd/cmds/testifIcanWrite
if -w /dd/cmds/testifIcanWrite
then
     del /dd/cmds/testifIcanWrite
     cd /dd/cmds
     ar -x /path/to/proramarchive
else
     echo You don't have permission to install.
     ex
endif

Problem is if "echo > /dd/cmds/te .. "
fails the program stops there and I never
get the message
     You don't have permission to install.
Is there a way that I can tell a shell script
to not end on an error but just to ignore
the error and continue to the next command ?



On 2020-06-28 03:07, Jeff Teunissen wrote:
> No, that's not correct.
> 
> The syntax is more like:
> 
> if -w /dd/cmds
> then
>     cd /dd/cmds
>     ar -x /path/to/proramarchive
> else
>     echo You don't have permission to install.
>     ex
> endif
> 
> However, that script fragment will not work because you can't use IF
> to check whether a directory is writable with Shell+ -- you can check
> that it's a directory, but -W is always false for directories because
> it only works for regular files, not directories.
> 
> 
> On Sat, Jun 27, 2020 at 7:22 PM <coco at jechar.ca> wrote:
>> 
>> IS THIS CORRECT FOR EXAMPLE ?
>> 
>> if -w /dd/cmds true  then cd /dd/cmds else echo "You do not have
>> Permission to Install to this System" endif
>> if -w /dd/cmds true  then ar2 -x proramarchive.ar else echo exit endif
>> 
>> Would this also be correct
>> 
>> if -w /dd/cmds true then
>>     cd /dd/cmds
>>     ar2 -x proramarchive.ar
>> else
>>     echo "You do not have Permission to Install to this System"
>>     exit
>> endif
>> 
>> On 2020-06-27 12:11, Rick Ulland wrote:
>> > shell 2.1 does what you want
>> >
>> > if *test* then *statements* else *statements* endif
>> >
>> > where test is
>> > -y           one char from stderr y=TRUE n=FALSE
>> > -f path   true if file exists
>> > -r path   true if file exists readable
>> > -w path   true if file exists writeable
>> > -e path   true if file exists and is execable
>> > -d path   true if file exists and is a directory
>> >
>> > Luck!
>> >
>> > -ricku
>> > CoNect
>> >
>> >
>> > On 6/27/20 10:58 AM, coco at jechar.ca wrote:
>> >>
>> >>  I want to make a script that will create some directorys and
>> >>  then do other things in those directorys. The problem is that
>> >>  maybe these directorys already exist causing the script to
>> >>  end prematurely with ERROR 218.
>> >>
>> >>  I am running shell_21.
>> >>
>> >>  Is there any way to tell the script just ignore errors and go to
>> >>  the next instruction anyway or is there a command or utility to
>> >>  test for the existence of a directory and allowing for conditional
>> >>  execution.
>> >>
>> >>  Charlie
>> >>
>> 
>> --
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