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| author | Masatake YAMATO <yamato@redhat.com> | 2017-07-18 06:27:59 +0900 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-08-28 20:51:23 +0200 |
| commit | d01c3289e7d68162e32bc08c2b65dd1a216a7ef8 (patch) | |
| tree | 34177b1e85f857b838fa75b08153d091472eb775 /drivers/mailbox | |
| parent | 199e717f252be0e31c97b9c7861dd6e2abfaa936 (diff) | |
| download | linux-d01c3289e7d68162e32bc08c2b65dd1a216a7ef8.tar.bz2 | |
pty: show associative slave of ptmx in fdinfo
This patch adds "tty-index" field to /proc/PID/fdinfo/N if N
specifies /dev/ptmx. The field shows the index of associative
slave pts.
Though a minor number is given for each pts instance, ptmx is not.
It means there is no way in user-space to know the association between
file descriptors for pts/n and ptmx. (n = 0, 1, ...)
This is different from pipe. About pipe such association can be solved
by inode of pipefs.
Providing the way to know the association between pts/n and ptmx helps
users understand the status of running system. lsof can utilize this field.
Signed-off-by: Masatake YAMATO <yamato@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/mailbox')
0 files changed, 0 insertions, 0 deletions