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651 lines
22 KiB
PHP
651 lines
22 KiB
PHP
<?php
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/* Header file for common file test functions
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Following functions are provided :
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create_files() : create files with specified contents
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delete_files() : delete files
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create_links() : crate links of different types
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delete_links() : delete links
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fill_files() : fill file with specified contents
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change_file_perms() : Change permission of files
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fill_buffer() : fills buffer with specified contents
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compare_self_stat() : compares the first 13 elements of the
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stat with the corresponding named key values of
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the same stat.
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compare_stats() : Compares two stat values
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*/
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define('file_not_found', 2, 1);
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/*
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Function: bool create_file(string $filename, string $mode = "w");
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Description: creates a new file using fopen() call
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$filename = Name of the file
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$mode = Mode as specified in fopen call, read documentation of fopen() call for more info
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Returns:
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true on success, false otherwise
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*/
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function create_file($filename, $mode = "w") {
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$file_handle = fopen ($filename, $mode);
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if ( $file_handle == false )
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return false;
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fclose($file_handle);
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return true;
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}
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/*
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Function : bool fill_buffer(string &$buffer, string $fill_type, int $fill_size);
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Description: Fills the $buffer with data as specified with requested size.
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$buffer = buffer to be filled
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$fill_type:
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"text" = fills with string of size $file_size
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"numeric" = fills with numeric value of size $file_size
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"text_with_new_line" = similar to "text" fill type but writes with new line
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"alphanumeric" = fills with alphnumeric values
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Returns: true on success, false on invalid fill type
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*/
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function fill_buffer(&$buffer, $fill_type, $fill_size) {
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if ( $fill_type == "text" ) {
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$data = "text ";
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$size_divider = strlen($data);
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$add_value = strlen($data);
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} else if ( $fill_type == "text_with_new_line" ) {
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$data = "line\nline of text\n";
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$size_divider = strlen($data);
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$add_value = strlen($data);
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} else if ( $fill_type == "alphanumeric" ) {
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$data = "ab12 ";
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$size_divider = strlen($data);
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$add_value = strlen($data);
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} else if ( $fill_type == "numeric" ) {
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$data = 2;
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$size_divider = 1;
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$add_value = 0;
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} else {
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// invalid fill type;
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return false;
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}
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$tmp_buff = str_repeat($data, ($fill_size/$size_divider) + $add_value );
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if ( strlen($tmp_buff) > $fill_size ) {
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$buffer = substr($tmp_buff, 0, $fill_size);
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} else {
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$buffer = $tmp_buff;
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}
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return true;
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}
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/*
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Function : bool fill_file(resource $file_handle, string $fill_type, string $file_size);
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Description: Fills the file with data as specified with requested size.
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$file_handle = file handle, opened with write options,
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$fill_type:
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"text" = fills with string of size $file_size
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"numeric" = fills with numeric value of size $file_size
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"empty" = no fill operation performed, returns true
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"text_with_new_line" = similar to "text" fill type but writes with new line
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"alphanumeric" = fills with alphnumeric values
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Returns: true on success, false on failure & invalid fill type
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*/
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function fill_file($file_handle, $fill_type, $file_size) {
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if ( $fill_type == "empty" ) {
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// no fill required, return true
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return true;
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} if ( $fill_type == "text" ) {
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$data = "text ";
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$size_divider = strlen($data);
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$add_value = strlen($data);
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} else if ( $fill_type == "text_with_new_line" ) {
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$data = "line\nline of text\n";
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$size_divider = strlen($data);
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$add_value = strlen($data);
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} else if ( $fill_type == "alphanumeric" ) {
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$data = "ab12 ";
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$size_divider = strlen($data);
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$add_value = strlen($data);
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} else if ( $fill_type == "numeric" ) {
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$data = 2;
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$size_divider = 1;
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$add_value = 0;
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} else {
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// invalid fill type;
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return false;
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}
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// write in terms of a chunk of 1 K to avoid memory size overflow
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$size = $file_size;
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$chunk_size = 1024;
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if ( $size > $chunk_size ) {
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$loop_count = 1;
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do {
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$loop_count ++;
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if ( $size <= $chunk_size ) {
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$chunk_size = $size;
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}
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$num_values = str_repeat($data, ($chunk_size/$size_divider) + $add_value );
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$bytes_written = fwrite($file_handle, $num_values, $chunk_size);
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if ( $bytes_written != $chunk_size ) {
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return false;
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}
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$size -= $chunk_size;
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} while ( $size > 0 );
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} else {
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$num_values = str_repeat($data, ($chunk_size/$size_divider) + $add_value );
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$bytes_written = fwrite($file_handle, $num_values, $file_size);
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if ( $bytes_written != $file_size ) {
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return false;
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}
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}
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// successful, return true
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return true;
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}
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/*
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Function: int change_file_perms(string $file_path, int $count = 1, int $perms = 0755,
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string $name_prefix = "file",
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string $name_suffix = 1, $file_extension = ".tmp");
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Description: changes file permission for given file(s).
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$file_path = dir path where file exists
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$count = no. of files, default is 1
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$perms = new permission of the file, similar to $mode args of chmod() call
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$name_prefix = common name prefix, default is "file"
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$name_suffix = suffix to end the common name given in name_prefix to create
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a unique name. default is 1.
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$file_extension = default is .tmp
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Returns:
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Integer, Count of total files permission changed.
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*/
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function change_file_perms($file_path,
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$count = 1,
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$perms = 0755,
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$name_prefix = "file",
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$name_suffix = 1,
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$file_extension = ".tmp" )
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{
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$changed = 0;
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if( $count <= 0 )
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return $changed;
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if ( $name_suffix <= 0)
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$name_suffix = 1;
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for($loop_counter = 1; $loop_counter <= $count; $loop_counter++) {
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$filename = $file_path."/".$name_prefix.$name_suffix.$file_extension;
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if( chmod($filename, $perms) )
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$changed++;
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$name_suffix++;
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}
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return $changed;
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}
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/*
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Function: array create_files( string $file_path,
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int $count = 1,
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string $content_type = "numeric",
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int $permission = 0755,
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int $size = 1,
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string $mode = "w",
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string $name_prefix = "file",
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int $name_suffix = 1,
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string $flag = "kilobytes"
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string $file_extension = ".tmp"
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);
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Description: Creates given number of files with specified mode and
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permissions. File is filled with content of size specified.
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$file_path = dir where files will be created
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$name_prefix = prefix to be used for names, name is suffix with a
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unqiue numeric value to make the file name unique, default = file
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$name_suffix = suffix to be used for the name, default = 1
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$count = total no. of files to be created, default = 1
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$mode = file open mode as specified in fopen() call. Do not use
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modes used for only reading the file. Default = "w"
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$permission = An octal number, This should be similar to $mode
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specified in chmod() call.
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$content_type = Specify type of the content to fill in the file.
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"numeric" = fill file with numeric vlaues
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"text" = fill file with regular text
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"empty" = empty file
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"text_with_new_line" = similar to text fill type, but writes with new line char
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"alphanumeric" = fill file with alpha numeric text
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If imporper $content type is specified, file is created as empty
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$size = size of the fill in terms of kilobyte, i.e size of the file.
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if $flag is specified as "byte", then then given size is taken in bytes
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$flag = specifiy if size has to be treated as no of total bytes or
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multiple of KB.
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"kilobytes" = take size in terms of multiple of KB
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"byte" = take size in terms of bytes
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$file_extension = default is .tmp
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Returns:
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An array with following key value pair:
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created => total file created
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filled => total files filled
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perms_changed => total files permission changed
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*/
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function create_files( $file_path,
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$count = 1,
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$content_type = "numeric",
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$permission = 0755,
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$size = 1,
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$mode = "w",
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$name_prefix = "file",
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$name_suffix = 1,
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$flag = "kilobytes",
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$file_extension = ".tmp"
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)
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{
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$return_value = array('created' => 0, 'filled' => 0, 'perms_changed' => 0);
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//ensure that suffix is a +ve integer
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if ($name_suffix <= 0) {
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$name_suffix = 1;
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}
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// check for proper size
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if ( $size == 0 )
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return $return_value;
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// prepare the size based on flag
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$file_size = $size;
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if ( $flag == "kilobytes" ) {
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$file_size = $file_size * 1024;
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}
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$tmp_name_suffix = $name_suffix;
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// create the files with specified mode and permission
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for($file_created_count = 1; $file_created_count <= $count; $file_created_count ++) {
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$filename = $file_path."/".$name_prefix.$tmp_name_suffix.$file_extension;
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$status = create_file($filename, $mode);
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$tmp_name_suffix++;
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if ($status == true) {
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$return_value['created']++;
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}
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else {
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return $return_value;
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}
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}
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if ( $content_type == "empty" ) {
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$return_value['filled'] = $count;
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} else {
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// fill the file with specifiec type of data and size
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$tmp_name_suffix = $name_suffix;
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for($loop_counter = 1; $loop_counter <= $count; $loop_counter ++) {
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$filename = $file_path."/".$name_prefix.$tmp_name_suffix.$file_extension;
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$file_handle = fopen($filename, $mode);
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if($file_handle == false) {
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fclose($file_handle);
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return $return_value;
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} // end of if
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// call fill_file() to fill the file
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if( fill_file($file_handle, $content_type, $file_size) )
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$return_value['filled']++;
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fclose($file_handle);
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$tmp_name_suffix++;
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} // end of for
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}
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// change all file's permissions
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$return_value['perms_changed'] = change_file_perms($file_path, $count, $permission, $name_prefix,
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$name_suffix, $file_extension);
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return $return_value;
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}
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/*
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Function: function create_links( $file_path,
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$filename,
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$link_count = 1,
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$link_type = "soft",
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$link_size = 1024,
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$link_name_prefix = "link",
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$link_name_suffix = 1,
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$link_file_content = "text",
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$link_perms = 0755,
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$link_file_extension = ".tmp"
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);
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Description: Creates given number of links with specified mode and
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permissions.Link is filled with content of size specified.
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$file_path = location of the file and where links need to be created
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$link_name_prefix = prefix to be used for names, name is suffix with a
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unique numeric value to make the file name unique, default = link
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$link_name_suffix = suffix to be used for the name, default = 1
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$link_count = total no. of links to be created to given file, default = 1
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$link_perms = An octal number, This should be similar to $mode
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specified in chmod() call.
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$link_file_content = Type of the content to fill in the file.
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numeric = fill file with numeric vlaues
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text = fill file with regular text
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text_with_new_line = same as text but new lines are written
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alphanumeric = fill with alphanumeric text
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If imporper $content type is specified, file is created as empty
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$size = size of the fill in terms of kilobyte, i.e size of the file.
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$link_type = type of the link to be created
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"soft" = soft link
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"hard" = hard link
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$filename = file used to create a link on
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Returns:
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An array with following key value pair:
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created => total file created
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filled => total files filled, always returned as 1
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perms_changed => total files permission changed
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*/
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function create_links($file_path,
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$filename,
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$link_count = 1,
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$link_type = "soft",
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$link_size = 1024,
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$link_name_prefix = "link",
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$link_name_suffix = 1,
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$link_file_content = "text",
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$link_perms = 0755,
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$link_file_extension = ".tmp"
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)
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{
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$return_value = array('created' => 0, 'filled' => 0, 'perms_changed' => 0);
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$tmp_name_suffix = $link_name_suffix;
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$src_filename = $file_path."/".$filename;
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switch( $link_type ) {
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default :
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case "soft" : // create a soft link
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for($link_created_count = 1; $link_created_count <= $link_count; $link_created_count++) {
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$linkname = $file_path."/".$link_name_prefix.$tmp_name_suffix.$link_file_extension;
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$status = symlink( $src_filename, $linkname);
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$tmp_name_suffix++;
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if ($status) {
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$return_value['created']++;
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}
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else {
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$return_value;
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}
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}
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break;
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case "hard" : // create a hard link
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for($link_created_count = 1; $link_created_count <= $link_count; $link_created_count++) {
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$linkname = $file_path."/".$link_name_prefix.$tmp_name_suffix.$link_file_extension;
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$status = link($src_filename, $linkname);
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$tmp_name_suffix++;
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if ($status) {
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$return_value['created']++;
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}
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else {
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$return_value;
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}
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}
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break;
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}
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if ( $link_file_content == "empty" ) {
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$return_value['filled'] = 1;
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return $return_value;
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}
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// fill the file with specific type of data and size
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$tmp_name_suffix = $link_name_suffix;
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$linkname = $file_path."/".$link_name_prefix.$tmp_name_suffix.$link_file_extension;
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$file_handle = fopen($linkname, "w");
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if($file_handle == false) {
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return $return_value;
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} // end of if
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// call fill_file() to fill the file
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if( fill_file($file_handle, $link_file_content, $link_size) )
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$return_value['filled']++;
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// close the link
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fclose($file_handle);
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// change the permission of the link file, only if hard link.
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// this is not applicable to soft links
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if( $link_type == "hard" ) {
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$return_value['perms_changed'] = change_file_perms($file_path,
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$link_count,
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$link_perms,
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$link_name_prefix,
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$link_name_suffix,
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$link_file_extension );
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}
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return $return_value;
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}
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/*
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Function: bool delete_file(string $filename);
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Description: delete a given file if exists
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Returns: true on success
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false on failure
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file_not_found if file doesn't exist
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*/
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function delete_file($filename) {
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// check if file exists
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if ( file_exists($filename) ) {
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if ( unlink($filename) )
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return true;
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else
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return false;
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}
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return file_not_found;
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}
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/*
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Function: array delete_files(string $file_path, int $count = 1, string $name_prefix = "file",
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int name_suffix = 1, $file_extension = ".tmp" );
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Description: Deletes given number of files if exists.
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$file_path = location of the files
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$name_prefix = prefix for the filename, rest of the name is incremental(increment by 1 only)
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numeric starting from suffix up to count
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$count = number of files to be deleted
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$name_suffix = first numeric suffix in the name
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Returns: An array with following key/value pair
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deleted = Number of files deleted.
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notfound = Count of non existing file
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failed = Count of failed to delete
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*/
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function delete_files($file_path,
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$count = 1,
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$name_prefix = "file",
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$name_suffix = 1,
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$file_extension = ".tmp")
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{
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$return_value = array ('deleted' => 0, 'notfound' => 0, 'failed' => 0);
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if ( $name_suffix < 1 )
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$name_suffix = 1;
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for($loop_counter = 1; $loop_counter <= $count; $loop_counter++) {
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$filename = $file_path."/".$name_prefix.$name_suffix.$file_extension;
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$name_suffix++;
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$status = delete_file($filename);
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if($status == true) {
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$return_value['deleted']++;
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} else if($status == file_not_found) {
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$return_value['notfound']++;
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} else {
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$return_value['failed']++;
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}
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} // end of for
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return $return_value;
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}
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/*
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Function: array delete_links( $file_path,
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$link_file_count,
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$link_name_prefix,
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$link_name_suffix,
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$link_file_extension );
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Description: Deletes given number of links if exists. Uses delete_files() function
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$file_path = location of link files
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$link_file_count = Number of link files
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$link_name_prefix = prefix for the linkname, rest of the name is incremental(increment by 1 only)
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numeric starting from $link_name_suffix up to count
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$link_name_suffix = first numeric suffix in the name
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Returns: An array with following key/value pair
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deleted = Number of links deleted.
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|
notfound = Count of non existing link
|
|
failed = Count of failed to delete
|
|
*/
|
|
function delete_links($file_path,
|
|
$link_file_count = 1,
|
|
$link_name_prefix = "link",
|
|
$link_name_suffix = 1,
|
|
$link_file_extension = ".tmp")
|
|
{
|
|
// call the delete files to delete links
|
|
$return_value = delete_files( $file_path,
|
|
$link_file_count,
|
|
$link_name_prefix,
|
|
$link_name_suffix,
|
|
$link_file_extension );
|
|
return $return_value;
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
Prototype:
|
|
function compare_self_stat( array $stat );
|
|
Description:
|
|
Compares the each of the first 13 values of the stat array with the
|
|
corresponding next 13 values of the same stat for equality
|
|
$stat = stat array
|
|
|
|
Retuns: true when all of them match, false otherwise
|
|
*/
|
|
function compare_self_stat( array $stat )
|
|
{
|
|
//return value
|
|
$return_value = true;
|
|
|
|
// named keys present in a stat
|
|
$string_keys = array("dev", "ino", "mode", "nlink", "uid", "gid",
|
|
"rdev", "size", "atime", "mtime", "ctime",
|
|
"blksize", "blocks");
|
|
|
|
// first numeric key
|
|
$key = 0;
|
|
|
|
// compare the values in the stat, which are accessed using numeric key with
|
|
// values accessed using string keys
|
|
foreach($string_keys as $str_key)
|
|
{
|
|
if($stat[$key] != $stat[$str_key]) {
|
|
echo "Error: stat[$key] doesn't match with stat[$str_key]\n";
|
|
$flag = false;
|
|
$key++;
|
|
}
|
|
else {
|
|
$key++;
|
|
}
|
|
} // end of foreach
|
|
|
|
// if the $return_value is false, i.e all the element do not match then
|
|
// dump the stat array so that its easy to figure out the error
|
|
if ($return_value == false ) {
|
|
echo "\n Dumping stat array ...\n";
|
|
var_dump($stat);
|
|
}
|
|
|
|
return $return_value;
|
|
}// end of compare_self_stat
|
|
|
|
/*
|
|
Prototype:
|
|
function compare_stats( array $stat1, array $stat2, array $fields,
|
|
[string $op = "==", [ bool $flag = false] ]);
|
|
Description:
|
|
Compares two stat values, stat value should be obtained by stat/lstat
|
|
$stat1 = first stat array
|
|
$stat2 = second stat array
|
|
$op = type of the comparison to be perform between elements of stat1 and stat2
|
|
"!=" compare for not equal
|
|
"==" compare for equality
|
|
">" if each element of stat1 is > than stat2
|
|
"<" if each element of stat1 is < than stat2
|
|
$fields = contains the key of the elements that needs to be compared.
|
|
type of the comparison is based on $op argument value
|
|
$flag = specify true to dump the stat1 and stat2
|
|
*/
|
|
|
|
$all_stat_keys = array(0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12,
|
|
"dev", "ino", "mode", "nlink", "uid", "gid",
|
|
"rdev", "size", "atime", "mtime", "ctime",
|
|
"blksize", "blocks");
|
|
|
|
function compare_stats($stat1, $stat2, $fields, $op = "==", $flag = false ) {
|
|
// dump the stat if requested
|
|
if ( $flag == true ) {
|
|
var_dump($stat1);
|
|
var_dump($stat2);
|
|
}
|
|
|
|
$result = true;
|
|
|
|
// compare values of given key from each stat array
|
|
for($index = 0; $index < count($fields); $index++)
|
|
{
|
|
switch( $op )
|
|
{
|
|
case "==":
|
|
if ( $stat1[ $fields[$index] ] != $stat2[ $fields[$index] ] ) {
|
|
$result = false;
|
|
echo "Error: stat1 do not match with stat2 at key value: $fields[$index]\n";
|
|
}
|
|
break;
|
|
|
|
case "!=":
|
|
if ( $stat1[ $fields[$index] ] != $stat2[ $fields[$index] ] ) {
|
|
// do nothing as its not equal, else will take care of if equal
|
|
} else {
|
|
$result = false;
|
|
echo "Error: stat1 equals stat2 at key value: $fields[$index]\n";
|
|
}
|
|
break;
|
|
|
|
case ">":
|
|
if ( $stat1[ $fields[$index] ] <= $stat2[ $fields[$index] ] ) {
|
|
$result = false;
|
|
echo "Error: stat1 is not greater than stat2 at key value: $fields[$index]\n";
|
|
}
|
|
break;
|
|
|
|
case "<":
|
|
if ( $stat1[ $fields[$index] ] >= $stat2[ $fields[$index] ] ) {
|
|
$result = false;
|
|
echo "Error: stat1 is not lesser than stat2 at key value: $fields[$index]\n";
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
// if the result is false(i.e values are not as expected),
|
|
// dump the stat array so that easy to figure out the error
|
|
if ( $result == false ) {
|
|
echo "\n Dumping stat array 1...\n";
|
|
var_dump($stat1);
|
|
echo "\n Dumping stat array 2...\n";
|
|
var_dump($stat2);
|
|
}
|
|
|
|
return $result;
|
|
}
|
|
|
|
?>
|