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Full Discussion: check for "cannot open file"
Top Forums UNIX for Dummies Questions & Answers check for "cannot open file" Post 302108431 by ssmith001 on Monday 26th of February 2007 12:29:32 PM
Old 02-26-2007
check for "cannot open file"

I have a small script that checks to see if a file exists and that it has data in it. I also need to check if the file can be opened. I had an issue today where the file it checks could not be opened and my script did not catch it. How do I check to see if it cannot be opened?

Code:
dirname=/opt/manu/srv
f1=manumgrmdip2_7500.log
f2=manumgrmdip2_7500.pid
export HOST=`hostname`
f1size=`wc -c $dirname/manumgrmdip2_7500.log | cut -f1 -d " "`
f2size=`wc -c $dirname/manumgrmdip2_7500.pid | cut -f1 -d " "`

if [[ ! -f $dirname/$f1 || ! -f $dirname/$f2 ]] ; then
      echo "Either <$dirname/$f1> or <$dirname/$f1> does not exist" | mailx -s "Missing files on Manugistics $HOST Server (MDIP2)" user@xyz.com
else if (( $(wc -c < $dirname/$f1) != 0 )) || (( $(wc -c < $dirname/$f2) > 6 )) ; then
      echo "The size of $dirname/$f1 size = $f1size, and $dirname/$f2 = $f2size'" | mailx -s "Error with file sizes on Manugistics $HOST Server (MDIP2)" user@xyz.com < manumgrmdip2_7500.log
     fi;
fi;

 

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DIRNAME(3)								 1								DIRNAME(3)

dirname - Returns parent directory's path

SYNOPSIS
string dirname (string $path) DESCRIPTION
Given a string containing the path of a file or directory, this function will return the parent directory's path. PARAMETERS
o $path - A path. On Windows, both slash ( /) and backslash ( ) are used as directory separator character. In other environments, it is the forward slash ( /). RETURN VALUES
Returns the path of the parent directory. If there are no slashes in $path, a dot (' .') is returned, indicating the current directory. Otherwise, the returned string is $path with any trailing /component removed. CHANGELOG
+--------+-------------------------------+ |Version | | | | | | | Description | | | | +--------+-------------------------------+ | 5.0.0 | | | | | | | dirname(3) is now binary safe | | | | +--------+-------------------------------+ EXAMPLES
Example #1 dirname(3) example <?php echo "1) " . dirname("/etc/passwd") . PHP_EOL; // 1) /etc echo "2) " . dirname("/etc/") . PHP_EOL; // 2) / (or on Windows) echo "3) " . dirname("."); // 3) . ?> NOTES
Note dirname(3) operates naively on the input string, and is not aware of the actual filesystem, or path components such as " ..". Note dirname(3) is locale aware, so for it to see the correct directory name with multibyte character paths, the matching locale must be set using the setlocale(3) function. Note Since PHP 4.3.0, you will often get a slash or a dot back from dirname(3) in situations where the older functionality would have given you the empty string. Check the following change example: <?php //before PHP 4.3.0 dirname('c:/'); // returned '.' //after PHP 4.3.0 dirname('c:/x'); // returns 'c:' dirname('c:/Temp/x'); // returns 'c:/Temp' dirname('/x'); // returns '' ?> SEE ALSO
basename(3), pathinfo(3), realpath(3). PHP Documentation Group DIRNAME(3)
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