diff options
Diffstat (limited to 'lib/libc/sys/open.2')
| -rw-r--r-- | lib/libc/sys/open.2 | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/lib/libc/sys/open.2 b/lib/libc/sys/open.2 index 3a5979f..04fa0fe 100644 --- a/lib/libc/sys/open.2 +++ b/lib/libc/sys/open.2 @@ -117,6 +117,7 @@ O_SYNC synchronous writes O_NOFOLLOW do not follow symlinks O_NOCTTY don't assign controlling terminal O_TTY_INIT restore default terminal attributes +O_DIRECTORY error if file is not a directory .Ed .Pp Opening a file with @@ -222,6 +223,14 @@ The initial call to on a TTY will always restore default terminal attributes on .Fx . .Pp +.Dv O_DIRECTORY +may be used to ensure the resulting file descriptor refers to a +directory. +This flag can be used to prevent applications with elevated privileges +from opening files which are even unsafe to open with +.Dv O_RDONLY , +such as device nodes. +.Pp If successful, .Fn open returns a non-negative integer, termed a file descriptor. @@ -413,6 +422,9 @@ argument is not an absolute path and is neither .Dv AT_FDCWD nor a file descriptor associated with a directory. +.It Bq Eq ENOTDIR +.Dv O_DIRECTORY +is specified and the file is not a directory. .El .Sh SEE ALSO .Xr chmod 2 , |
