proc_pid_fdinfo(5) File Formats Manual proc_pid_fdinfo(5) /proc/pid/fdinfo/ - . . . . : $ cat /proc/12015/fdinfo/4 pos: 1000 flags: 01002002 mnt_id: 21 : pos . flags ( open(2)). close-on-exec flags O_CLOEXEC. 3.1 O_CLOEXEC close-on-exec. mnt_id 3.15 . /proc/pid/mountinfo. eventfd ( eventfd(2)) ( 3.8) : pos: 0 flags: 02 mnt_id: 10 eventfd-count: 40 eventfd-count eventfd . epoll ( epoll(7)) ( 3.8) : pos: 0 flags: 02 mnt_id: 10 tfd: 9 events: 19 data: 74253d2500000009 tfd: 7 events: 19 data: 74253d2500000007 tfd epoll ( epoll_ctl(2) ). tfd . events . data . signalfd ( signalfd(2)) ( 3.8) : pos: 0 flags: 02 mnt_id: 10 sigmask: 0000000000000006 sigmask signalfd . ( 2 3 SIGINT SIGQUIT signal(7).) inotify ( inotify(7)) ( Linux 3.8) : pos: 0 flags: 00 mnt_id: 11 inotify wd:2 ino:7ef82a sdev:800001 mask:800afff ignored_mask:0 fhandle-bytes:8 fhandle-type:1 f_handle:2af87e00220ffd73 inotify wd:1 ino:192627 sdev:800001 mask:800afff ignored_mask:0 fhandle-bytes:8 fhandle-type:1 f_handle:27261900802dfd73 "inotify" . : wd ( ). ino inode ( ). sdev ( ). mask ( ). exportfs : fhandle-bytes fhandle-type f_handle. fanotify ( fanotify(7)) ( Linux 3.8) : pos: 0 flags: 02 mnt_id: 11 fanotify flags:0 event-flags:88002 fanotify ino:19264f sdev:800001 mflags:0 mask:1 ignored_mask:0 fhandle-bytes:8 fhandle-type:1 f_handle:4f261900a82dfd73 fanotify fanotify_init(2): flags flags fanotify_init(2) ( ). event-flags event_f_flags fanotify_init(2) ( ). fanotify. inotify : mflags ( ). mask ( ). ignored_mask ( ). fanotify_mark(2). timerfd ( timerfd(2)) ( 3.17) : pos: 0 flags: 02004002 mnt_id: 13 clockid: 0 ticks: 0 settime flags: 03 it_value: (7695568592, 640020877) it_interval: (0, 0) clockid ( CLOCK_* ) ( 0 CLOCK_REALTIME). ticks ( read(2) ). settime flags timerfd ( timerfd_settime(2)) ( TFD_TIMER_ABSTIME TFD_TIMER_CANCEL_ON_SET). it_value . TFD_TIMER_ABSTIME. it_interval . ( it_value it_interval timerfd_gettime(2) .) 2.6.22. proc(5) 3 . . : . 6.18 8 2026 proc_pid_fdinfo(5)