PHP 4.0 Bug #4180 Updated: is_link returns false when target doesnt exist (should return true)

ID: 4180 Updated by: zak Reported By: dfarmer@evoke.com Status: Closed Bug Type: *General Issues Assigned To: Comments: Olivier Cahange <olivier.cahagne@epita.fr> reports this bug as being fixed in 4.0.3RC1 Previous Comments: --------------------------------------------------------------------------- [2000-04-18 13:26:10] dfarmer@evoke.com It appears that is_link is incorrect when testing a symbolic link file whose target does not exist. is_link("/absolute/path/to/my/link") returns false when the link points to a non-existant target. I believe it should return true based on the following C code: #include <sys/stat.h> #include <unistd.h> #include <stdio.h> main(int argc, char **argv) { struct stat buf; char * file_name = argv[1]; lstat(file_name, &buf); if (S_ISLNK(buf.st_mode)) { printf("file is a linkn"); } else { printf("file is not a linkn"); } } This prints "file is a link" even when the target doesn't exist. This is an issue because you can't tell when the symlink already exists even if it is incorrect. I've tried lstat (returns 0 length array), fileexists (false), etc. symlink fails on the creation of the link because it is there. It seems like the only way to detect this condition is to have a successful readlink call combined with a false file_exists or symlink call. The ChangeLog for 3.0.15 and 3.0.16 doesn't address this issue as being fixed. --------------------------------------------------------------------------- Full Bug description available at: http://bugs.php.net/?id=4180