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121 lines
3.7 KiB
Plaintext
121 lines
3.7 KiB
Plaintext
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--TEST--
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Test symlink(), linkinfo(), link() and is_link() functions : usage variations - access/update file through hard link
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--SKIPIF--
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<?php
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if (substr(PHP_OS, 0, 3) == 'WIN') {
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die('skip no symlinks on Windows');
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}
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?>
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--FILE--
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<?php
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/* Prototype: bool symlink ( string $target, string $link );
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Description: creates a symbolic link to the existing target with the specified name link
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Prototype: bool is_link ( string $filename );
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Description: Tells whether the given file is a symbolic link.
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Prototype: bool link ( string $target, string $link );
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Description: Create a hard link
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Prototype: int linkinfo ( string $path );
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Description: Gets information about a link
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*/
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/* Variation 4 : Create file and a hard link to the file
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Access data of the file through the hard link
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Update the file through hard link
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Check size of file and hard link
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*/
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$file_path = dirname(__FILE__);
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echo "*** Accessing and updating data of file through hard link ***\n";
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// Creating file and inserting data into it
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$filename = "$file_path/symlink__link_linkinfo_is_link_variation4.tmp";
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// create temp file
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$file = fopen($filename, "w");
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// fill data into file
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fwrite($file, str_repeat("text", 20) );
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fclose($file);
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echo "\n-- Access data of the file through the hard link --\n";
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// create hard link to file
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$linkname = "$file_path/symlink_link_linkinfo_is_link_link_variation4.tmp";
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var_dump( link($filename, $linkname) );
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$data_from_link = file_get_contents($linkname); // data read from $filename
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var_dump( $data_from_link );
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echo "\n-- Check size of hard link and file --\n";
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if( filesize($filename) == filesize($linkname) )
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echo "\nSize of file and hard link are same\n";
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else
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echo "\nWarning: Size of file and hard link differ\n";
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echo "\n-- Updating file with data through hard link --\n";
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// append link with data
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$fp = fopen($linkname, "a"); // open in append mode
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fwrite($fp, "Hello World");
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fclose($fp);
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// now check temp file for data; it should append "Hello World"
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$data_from_file = file_get_contents($filename);
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var_dump( $data_from_file );
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echo "\n-- Check size of hard link and file --\n";
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if( filesize($filename) == filesize($linkname) )
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echo "\nSize of file and hard link are same\n";
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else
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echo "\nWarning: Size of file and hard link differ\n";
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echo "\n-- Updating file with data and check data through hard link --\n";
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// write to temp file
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$file = fopen($filename, "w");
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fwrite($file, "Hello World");
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fclose($file);
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// now check link for data; it should echo "Hello World"
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$data_from_link = file_get_contents($linkname);
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var_dump( $data_from_link );
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echo "\n-- Check size of hard link and file --\n";
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var_dump( filesize($filename) );
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var_dump( filesize($linkname) );
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if( filesize($filename) == filesize($linkname) )
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echo "\nSize of file and hard link are same\n";
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else
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echo "\nWarning: Size of file and hard link differ\n";
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// delete the link
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unlink($linkname);
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// delete the temporary file
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unlink($filename);
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echo "Done\n";
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?>
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--EXPECTF--
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*** Accessing and updating data of file through hard link ***
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-- Access data of the file through the hard link --
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bool(true)
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string(80) "texttexttexttexttexttexttexttexttexttexttexttexttexttexttexttexttexttexttexttext"
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-- Check size of hard link and file --
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Size of file and hard link are same
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-- Updating file with data through hard link --
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string(91) "texttexttexttexttexttexttexttexttexttexttexttexttexttexttexttexttexttexttexttextHello World"
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-- Check size of hard link and file --
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Size of file and hard link are same
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-- Updating file with data and check data through hard link --
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string(11) "Hello World"
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-- Check size of hard link and file --
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int(11)
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int(11)
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Size of file and hard link are same
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Done
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