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Full Discussion: Error code checking
Top Forums Shell Programming and Scripting Error code checking Post 302133011 by jepombar on Tuesday 21st of August 2007 12:21:56 PM
Old 08-21-2007
I'm doing it in perl
Sorry if I wasn't clear.
I need to create a folder and if there is any errors like permission errors I want to let the user know about it. However I don't wish to overwrite the folder if it already exists. Also I need to do it inside a Perl script.

This is the workaround I came up with:

`ls log 2> /dev/null`; #check if the folder exists
if($?) { #if it doesn't create it
`mkdir log`;
$dirFlag = 1; #flag to know that dir was created
}

The bad thing about this is that it wont let the user know if there were any permission errors. In other words, if the folder wasn't created for some reason the program will crash later when I try to write to that folder.

So what I want to do is to somehow check, in my Perl code, the error code that UNIX spits out. The problem is that I'm getting the same error code number for both "File Permission" and "File exists" errors.
 

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LEARN ABOUT OSF1

rmf

rmf(1)							      General Commands Manual							    rmf(1)

NAME

       rmf - remove folder (only available within the message handling system, mh)

SYNOPSIS

       rmf [+folder] [-help] [-[no]interactive]

OPTIONS

       Prints  a  list of the valid options to this command.  Asks for confirmation before deleting a folder. By default, rmf deletes a folder and
       its messages without asking for confirmation.  If you specify the -interactive option, rmf asks if you are sure before deleting the folder.
       You are advised to use this option, since when rmf deletes a folder its contents are lost irretrievably.

DESCRIPTION

       The  rmf  command  removes all of the messages within the current folder, and then removes the folder itself. If there are any files within
       the folder which are not part of MH, they are not removed, and an error message is displayed.

       You can specify a folder other than the current folder by using the +folder argument. If you do not specify a folder, and rmf  cannot  find
       the current folder,rmf asks you whether you want to delete +inbox instead.

       If the current folder is removed, it makes +inbox current.

       Note that the rmf command irreversibly deletes messages that do not have other links, so use it with caution.

       If  the	folder	being removed is a sub-folder, the parent folder becomes the new current folder, and rmf tells you that this has happened.
       This provides an easy mechanism for selecting a set of messages, operating on the list, then removing the list and returning to the current
       folder from which the list was extracted.

       Using  rmf  to  delete a read-only folder deletes the private sequence and current message information from the file, without affecting the
       folder itself. If you have sub-folders within a folder, you must delete all the sub-folders before you can delete the folder itself.

PROFILE COMPONENTS

       Path: To determine the user's Mail directory

EXAMPLES

       This example shows how rmf asks for confirmation when the -interactive option is used: % rmf -interactive +test Remove folder "test"? y

FILES

       The user profile.

SEE ALSO

       rmm(1)

																	    rmf(1)
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