Bug #63908 [Nab]: file_put_contents is not atomic.

Edit report at https://bugs.php.net/bug.php?id=63908&edit=1 ID: 63908 Updated by: rasmus@php.net Reported by: awm086 at gmail dot com Summary: file_put_contents is not atomic. Status: Not a bug Type: Bug Package: Filesystem function related Operating System: LINUX PHP Version: Irrelevant Block user comment: N Private report: N New Comment: You mean tempnam and no, not at all. tempnam() creates an empty file, it doesn't put anything in it. You can't check disk space, create a file and write to it, all in one atomic operation. Previous Comments: ------------------------------------------------------------------------ [2013-01-07 23:48:20] awm086 at gmail dot com I noticed that function tempname does the same thing. Is that the case? ------------------------------------------------------------------------ [2013-01-06 00:33:34] rasmus@php.net http://lxr.php.net/xref/PHP_5_4/ext/standard/file.c#564 ------------------------------------------------------------------------ [2013-01-06 00:24:42] awm086 at gmail dot com Where can I find the C implementation of the function. I am just curious now. ------------------------------------------------------------------------ [2013-01-06 00:09:16] rasmus@php.net Nope, sorry, there isn't. The false indicates that the function wasn't able to complete its operation. Much like the underlying filesystem calls, there is no such thing as transactions or anything along those lines where you can group a bunch of operations into a single atomic unit. That's simply not how filesystem operations work. ------------------------------------------------------------------------ [2013-01-05 23:40:34] awm086 at gmail dot com I cannot belive that a function returns false, indicating that a file failed to be written, and still write to the file system. There must be a way. ------------------------------------------------------------------------ The remainder of the comments for this report are too long. To view the rest of the comments, please view the bug report online at https://bugs.php.net/bug.php?id=63908 -- Edit this bug report at https://bugs.php.net/bug.php?id=63908&edit=1