https://bugzilla.kernel.org/show_bug.cgi?id=118671 Bug ID: 118671 Summary: mkfifo(3) & mknod(3) and EPERM Product: Documentation Version: unspecified Hardware: All OS: Linux Status: NEW Severity: low Priority: P1 Component: man-pages Assignee: documentation_man-pages@xxxxxxxxxxxxxxxxxxxx Reporter: nyh@xxxxxxxxxxxxxxxxxxx Regression: No The mkfifo(3) manual page explains several possible errno settings for mkfifo() failures, but fails to mention one: EPERM. For example, I am getting this error when trying to create a named pipe in a directory mounted on CIFS (Windows share): $ mkfifo a mkfifo: cannot create fifo 'a': Operation not permitted It appears that mknod(3) also gets the same error (EPERM) when trying to create a FIFO on a CIFS-mounted directory. Here, the manual page does mention EPERM, but it says it can only happen when the file type is *not* FIFO, but this is apparently not the whole story - it seems mknod() can fail with EPERM also on FIFO, if the filesystem does not support fifos. By the way, it can also fail with EPERM when trying to create other special files if the filesystem doesn't support them - even if the user has every possible permissions. -- You are receiving this mail because: You are watching the assignee of the bug. -- To unsubscribe from this list: send the line "unsubscribe linux-man" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
