Bug #72642 [Nab]: realpath() failing to expand path

Edit report at https://bugs.php.net/bug.php?id=72642&edit=1 ID: 72642 User updated by: anrdaemon at freemail dot ru Reported by: anrdaemon at freemail dot ru Summary: realpath() failing to expand path Status: Not a bug Type: Bug Package: Filesystem function related Operating System: Windows PHP Version: 7.1.0beta1 Block user comment: N Private report: N New Comment: Did you ever read the provided test script? Did you try to run it? I can replace /J with /D, then you will not be able to run it without elevated privileges, but the result would not change. And it is funny you mentioned readlink, because 'realpath.php': <?php $rootdir = substr($_SERVER['SystemRoot'], 0, 3); $tmpdir = getenv('TEMP'); shell_exec("mklink /J \"{$rootdir}home\" \"{$rootdir}Users\""); shell_exec("mklink /J \"{$tmpdir}\\test.dir\" \"{$rootdir}home\\Public\\Desktop\""); $file = "{$tmpdir}\\test.dir\\desktop.ini"; $rfile = realpath($file); printf("orig.file name: %s\n", $file); printf("realpath(name): %s\n", $rfile); printf("THE real name: %s\n", realpath($rfile)); printf("readlink -fe: %s\n", shell_exec("readlink -fe \"$file\"")); if($rfile != realpath($rfile)) print "Fail as is.\n"; rmdir("{$rootdir}home"); rmdir("{$tmpdir}\\test.dir"); [C:\Programs\php-7.1.0b1]$ php.cmd -f realpath.php orig.file name: C:\Users\ANRDAE~1\AppData\Local\Temp\test.dir\desktop.ini realpath(name): C:\home\Public\Desktop\desktop.ini THE real name: C:\Users\Public\Desktop\desktop.ini readlink -fe: /c/Users/Public/Desktop/desktop.ini Fail as is. [C:\Programs\php-7.1.0b1]$ For your future genious resolutions, all NTFS symlinks are junctions, just with different attributes. Previous Comments: ------------------------------------------------------------------------ [2016-07-22 00:31:30] pajoye@php.net Junctions are like hard link and are not resolved by realpath (or readlink). ------------------------------------------------------------------------ [2016-07-21 23:38:53] anrdaemon at freemail dot ru Description: ------------ realpath(), according to the documentation, is supposed to unwind every symlink and relative reference in the given string and produce an absolute and unambiguous path. Well… it doesn't perform its job quite as desired. Affected PHP versions: same behavior observed in 5.3.29, 5.6.23, 7.0.8 and 7.1.0b1. Test script: --------------- <?php $rootdir = substr($_SERVER['SystemRoot'], 0, 3); $tmpdir = getenv('TEMP'); shell_exec("mklink /J \"{$rootdir}home\" \"{$rootdir}Users\""); shell_exec("mklink /J \"{$tmpdir}\\test.dir\" \"{$rootdir}home\\Public\\Desktop\""); $file = "{$tmpdir}\\test.dir\\desktop.ini"; $rfile = realpath($file); printf("orig.file name: %s\n", $file); printf("realpath(name): %s\n", $rfile); printf("THE real name: %s\n", realpath($rfile)); if($rfile != realpath($rfile)) print "Fail as is.\n"; rmdir("{$rootdir}home"); rmdir("{$tmpdir}\\test.dir"); Expected result: ---------------- orig.file name: C:\Users\ANRDAE~1\AppData\Local\Temp\test.dir\desktop.ini realpath(name): C:\Users\Public\Desktop\desktop.ini THE real name: C:\Users\Public\Desktop\desktop.ini Actual result: -------------- orig.file name: C:\Users\ANRDAE~1\AppData\Local\Temp\test.dir\desktop.ini realpath(name): C:\home\Public\Desktop\desktop.ini THE real name: C:\Users\Public\Desktop\desktop.ini Fail as is. ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=72642&edit=1