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Top Forums Programming Small query regarding function "char * strerror(int errnum)" Post 302762679 by Corona688 on Tuesday 29th of January 2013 01:29:44 AM
Old 01-29-2013
Quote:
Originally Posted by Praveen_218
The primary reason to ask this query is because of the fact that the MAN pages themselves not making me sure if the programmer needs to handle any kind of cleanup post calling strerror()? Just like the call to stat(), lstat(), fstat() which create objects of type struct stat on the heap itself (whose address is returned through the pointer struct stat *sb)
They do no such thing. Pointers do not work that way! You cannot "return an address" through a pointer you pass into a function, any more than you can return a number through a number you pass into a function.

You do not need to clean up after strerror -- or stat, lstat, or fstat, either.
 

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FSTAT(3)								 1								  FSTAT(3)

fstat - Gets information about a file using an open file pointer

SYNOPSIS
array fstat (resource $handle) DESCRIPTION
Gathers the statistics of the file opened by the file pointer $handle. This function is similar to the stat(3) function except that it operates on an open file pointer instead of a filename. PARAMETERS
o $handle -A file system pointer resource that is typically created using fopen(3). RETURN VALUES
Returns an array with the statistics of the file; the format of the array is described in detail on the stat(3) manual page. EXAMPLES
Example #1 fstat(3) example <?php // open a file $fp = fopen("/etc/passwd", "r"); // gather statistics $fstat = fstat($fp); // close the file fclose($fp); // print only the associative part print_r(array_slice($fstat, 13)); ?> The above example will output something similar to: Array ( [dev] => 771 [ino] => 488704 [mode] => 33188 [nlink] => 1 [uid] => 0 [gid] => 0 [rdev] => 0 [size] => 1114 [atime] => 1061067181 [mtime] => 1056136526 [ctime] => 1056136526 [blksize] => 4096 [blocks] => 8 ) NOTES
Note This function will not work on remote files as the file to be examined must be accessible via the server's filesystem. PHP Documentation Group FSTAT(3)
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