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author | mpp <mpp@FreeBSD.org> | 1996-12-14 22:18:08 +0000 |
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committer | mpp <mpp@FreeBSD.org> | 1996-12-14 22:18:08 +0000 |
commit | 5fb251bcf3bc8aa20111a592359d0f9a10ed71ba (patch) | |
tree | 62c3139af30526bfd00b2bcdd810436763defc5d /sbin/mount_std | |
parent | 8fd068f251f91e503a5adee692b493c36eef14ff (diff) | |
download | FreeBSD-src-5fb251bcf3bc8aa20111a592359d0f9a10ed71ba.zip FreeBSD-src-5fb251bcf3bc8aa20111a592359d0f9a10ed71ba.tar.gz |
Refer the reader to fdesc(5) for detailed info on the fdesc filesystem.
Diffstat (limited to 'sbin/mount_std')
-rw-r--r-- | sbin/mount_std/mount_fdesc.8 | 96 |
1 files changed, 11 insertions, 85 deletions
diff --git a/sbin/mount_std/mount_fdesc.8 b/sbin/mount_std/mount_fdesc.8 index abb3d64..45cfc1b 100644 --- a/sbin/mount_std/mount_fdesc.8 +++ b/sbin/mount_std/mount_fdesc.8 @@ -73,98 +73,24 @@ See the man page for possible options and their meanings. .El .Pp -The contents of the mount point are -.Pa fd , -.Pa stderr , -.Pa stdin , -.Pa stdout -and -.Pa tty . -.Pp -.Pa fd -is a directory whose contents -appear as a list of numbered files -which correspond to the open files of the process reading the -directory. -The files -.Pa /dev/fd/0 -through -.Pa /dev/fd/# -refer to file descriptors which can be accessed through the file -system. -If the file descriptor is open and the mode the file is being opened -with is a subset of the mode of the existing descriptor, the call: -.Bd -literal -offset indent -fd = open("/dev/fd/0", mode); -.Ed -.Pp -and the call: -.Bd -literal -offset indent -fd = fcntl(0, F_DUPFD, 0); -.Ed -.Pp -are equivalent. -.Pp -The files -.Pa /dev/stdin , -.Pa /dev/stdout -and -.Pa /dev/stderr -appear as symlinks to the relevant entry in the -.Pa /dev/fd -sub-directory. -Opening them is equivalent to the following calls: -.Bd -literal -offset indent -fd = fcntl(STDIN_FILENO, F_DUPFD, 0); -fd = fcntl(STDOUT_FILENO, F_DUPFD, 0); -fd = fcntl(STDERR_FILENO, F_DUPFD, 0); -.Ed -.Pp -Flags to the -.Xr open 2 -call other than -.Dv O_RDONLY , -.Dv O_WRONLY -and -.Dv O_RDWR -are ignored. -.Pp -The -.Pa /dev/tty -entry is an indirect reference to the current process's controlling terminal. -It appears as a named pipe (FIFO) but behaves in exactly the same way as -the real controlling terminal device. +See +.Xr fdesc 5 +for a detailed description of the contents +of the +.Nm fdesc +filesystem. .Sh FILES .Bl -tag -width /dev/stderr -compact -.It Pa /dev/fd/# -.It Pa /dev/stdin -.It Pa /dev/stdout -.It Pa /dev/stderr -.It Pa /dev/tty -.El +.It Pa /dev +Normal mount point for the +.Nm fdesc +filesystem. .Sh SEE ALSO .Xr mount 2 , .Xr unmount 2 , -.Xr tty 4 , +.Xr fdesc 5 , .Xr fstab 5 , .Xr mount 8 -.Sh CAVEATS -No -.Pa . -and -.Pa .. -entries appear when listing the contents of the -.Pa /dev/fd -directory. -This makes sense in the context of this filesystem, but is inconsistent -with usual filesystem conventions. -However, it is still possible to refer to both -.Pa . -and -.Pa .. -in a pathname. -.Pp -This filesystem may not be NFS-exported. .Sh HISTORY The .Nm mount_fdesc |