On Tue, Jul 18, 2017 at 06:27:59AM +0900, Masatake YAMATO wrote: > 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 <[email protected]> > --- > drivers/tty/pty.c | 8 +++++++- > drivers/tty/tty_io.c | 9 +++++++++ > include/linux/tty_driver.h | 2 ++ > 3 files changed, 18 insertions(+), 1 deletion(-)
Sorry for the delay, now applied. greg k-h
