Csh to check for existence of file - Shell Programming and Scripting

Raynon · #1 (**permalink**) 12-04-2007

Hi,

I would like to check the existence of files (doesn;t matter the number of files) in a directory.
My file is named in the following manner (always ending with " myfile "). Can anybody give me some guidance?

EG:
abc1_myfile
sdfr_myfile
sffgd_myfile
and so on ......

My intention is to perform the following:

if file exist, perform plan A.
else perform plan B.

robsonde · #2 (**permalink**) 12-04-2007

if [ -f *myfile ]
then
do stuff
else
do other stuff
fi

Raynon · #3 (**permalink**) 12-04-2007

Hi robsonde,

Thanks. But your codes are not in csh i suppose.

porter · #4 (**permalink**) 12-04-2007

Code:

if ls *myfile 2>/dev/null
then
    echo some exist
fi

reborg · #5 (**permalink**) 12-04-2007

I'm a bit rusty on csh, since I never use it but if I remember correctly from when we had a bunch of users to support who did use it, the syntax would be something like:

Code:

foreach file ( *_myfile )
    echo $file
end

or if you want the action a or action b

Code:

ls *_myfile >& /dev/null
if ( $status == 0 ) then
    foreach file ( *_myfile )
        echo $file
    end
else
    echo "no files"
endif

Raynon · #6 (**permalink**) 12-05-2007

hi reborg,

I tried the " $status " in a directory containing *myfile.
And these statement appear " Reset tty pgrp from 7873 to 11434 ". What does this statement mean ?
Is " $status " a special variable in csh ?

Code:

% ls *myfile
xxx1_myfile  xxx2_myfile
% ls *myfile|echo $status
0
% Reset tty pgrp from 7873 to 11434

denn · #7 (**permalink**) 12-05-2007

$status in csh/tcsh is the same as $? in sh/ksh

The below should work for you, for multiple files.

Code:

#!/bin/csh

foreach file ( $* )
ls $file 2>&1 /dev/null
        if ( $status == 0 ) then
                echo $file
        else
            echo "no files"
        endif
end

to test: ./scriptname file1 file2 file3

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