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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Missing SFTP file attribute constants","articleBody":"### Bug reports\r\nI tried to set permission on a file on a SFTP server. I use normally use FileZilla to interact with the server, but I needed a fast way to change a lot of files, file permission. So I thought I would write a python script.\r\n\r\nI noticed 2 things, if I only have read access to the file, I could not change the permission, giving me a `ssh2.exceptions.SFTPProtocolError`, I can using the same login, change the permission in FileZilla.\r\n\r\nThe second and more important issue, was that I could not change the permission at all using the code described below:\r\n__Steps to reproduce:__\r\n\r\n```py\r\ndef chmod(sftp, path, permissions):\r\n    stat = sftp.stat(path)\r\n    print(\"original permission\", oct(stat.permissions))\r\n    \r\n    stat.permissions = permissions | 0x8000 #I tried without the '|' as well, and I tried with only LIBSSH2_SFTP_S_IRWXU\r\n    print(\"seting permissions to \", oct(stat.permissions))\r\n\r\n    try:\r\n        if sftp.setstat(path, stat) == 0:\r\n            stat = sftp.stat(path)\r\n            print(\"managed to set permissions to \", oct(stat.permissions))\r\n        else:\r\n            print(\"failed to set permissions\")\r\n\r\n    except Exception:\r\n        raise\r\n```\r\nThe out put is this when trying to change the permission of a file from '666' to '755'\r\n\r\n```txt\r\noriginal permission 0o100666\r\nseting permissions to  0o100755\r\nmanaged to set permissions to  0o100666\r\nsuccess\r\n```\r\n__Expected behaviour:__ \r\nI expect that I can change permission on files with only read-access, as long as the authenticated user, has privileges todo so\r\nI expected that the new file permission would be '755' after calling `setstat` with changed permissions\r\n__Actual behaviour:__ \r\nWhen I only read access has been set on a file it throws a `ssh2.exceptions.SFTPProtocolError`\r\nWhen trying to setstat it does not change, even though the `setstat()` returned a 0\r\n__Additional info:__ \r\nI am uncertain of which libssh2 I am running, as I just pip installed `ssh2-python` and it was up and running, but if I were to hazard a guess, I'd say 1.9.0","author":{"url":"https://github.com/Togtja","@type":"Person","name":"Togtja"},"datePublished":"2020-10-13T11:08:37.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":12},"url":"https://github.com/119/ssh2-python/issues/119"}