ID: 42036 User updated by: kraghuba at in dot ibm dot com Reported By: kraghuba at in dot ibm dot com -Status: No Feedback +Status: Open Bug Type: Filesystem function related Operating System: RHEL 5 PHP Version: 5CVS-2007-07-18 (snap) Assigned To: wez New Comment:
I have tried similar stuff on C language and and found that feof doesn't get changed by using fgetc() on file opened in write only mode. The documentation of fgetc() for C says that it returns an int or EOF on end of the file or an *error*. I haven't have enough time to look at any other version other than php6 and 5 (: I think that same thing can be done for php, the application level error should be reported as false and this should be documented. Even other wise if you decide to have the EOF as application level error then it should be documented. Sample code that i use for checking it fgetc() on C : #include <stdio.h> int main ( void ) { FILE *fp; char ch; fp = fopen("test.txt", "w"); fwrite("testing", 7, 1, fp); rewind(fp); printf("\nftell() returns = %d\n", ftell(fp) ); printf("\nfeof() returns = %s\n", ( feof(fp) ? "true" : "false") ); // try read printf("\nfgets() returns = %d\n", fgetc(fp) ); printf("\nftell() returns = %d\n", ftell(fp) ); printf("\nfeof() returns = %s\n", ( feof(fp) ? "true" : "false") ); fclose(fp); } Output: ftell() returns = 0 feof() returns = false fgets() returns =-1 ftell() returns = 0 feof() returns = false Previous Comments: ------------------------------------------------------------------------ [2007-07-31 01:00:01] php-bugs at lists dot php dot net No feedback was provided for this bug for over a week, so it is being suspended automatically. If you are able to provide the information that was originally requested, please do so and change the status of the bug back to "Open". ------------------------------------------------------------------------ [2007-07-23 14:47:48] [EMAIL PROTECTED] Without having had time to dig deeper just yet, if you open for write only, you shouldn't expect to be able to read. This application-level error is reflected as EOF. So the question becomes, is this behavior different from libc, and did the php behavior change between releases? (I'm not including PHP 6 in that, because it is not released yet) If the latter, we need to fix it, it not, we probably shouldn't fix it if there's a risk of breaking an app. I'm leaning towards won't fix; you should open the file as you intend to use it. ------------------------------------------------------------------------ [2007-07-23 08:34:56] [EMAIL PROTECTED] Wez, could you plz comment this? ------------------------------------------------------------------------ [2007-07-21 05:55:08] kraghuba at in dot ibm dot com This defect is also applicable to the function fgets(). ------------------------------------------------------------------------ [2007-07-18 16:48:08] kraghuba at in dot ibm dot com Description: ------------ fgetc() sets the end of the file flag to ture when reading from a file which opened in write only mode. This failure is applicable on php5 and php6 php version: PHP 6.0.0-dev (cli) (built: Jul 18 2007 20:53:03) (GCOV) Copyright (c) 1997-2007 The PHP Group Zend Engine v3.0.0-dev, Copyright (c) 1998-2007 Zend Technologies & PHP 5.2.4-dev (cli) (built: Jul 18 2007 20:49:53) (GCOV) Copyright (c) 1997-2007 The PHP Group Zend Engine v2.2.0, Copyright (c) 1998-2007 Zend Technologies OS : RHEL 5 configure setup: ./configure --enable-gcov Reproduce code: --------------- <?php $fp = fopen("test.txt", "w"); var_dump( fwrite($fp, "Text") ); // rewind the file pointer to begining var_dump( rewind($fp) ); var_dump( ftell($fp) ); var_dump( feof($fp) ); // try to read var_dump( fgetc($fp) ); var_dump( ftell($fp) ); var_dump( feof($fp) ); fclose($fp); unlink("test.txt"); ?> Expected result: ---------------- output - php5: -------------- int(4) bool(true) int(0) bool(false) bool(false) int(0) bool(false) output - php6: -------------- int(4) bool(true) int(0) bool(false) bool(false) int(0) bool(false) Actual result: -------------- output - php5: -------------- int(4) bool(true) int(0) bool(false) bool(false) int(0) bool(true) output - php6: -------------- int(4) bool(true) int(0) bool(false) string(1) "" int(0) bool(true) output on php6 when run using run-test.php : int(4) bool(true) int(0) bool(false) string(1) "ΓΏ" int(0) bool(true) ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=42036&edit=1