man > proc_pid_mounts(5)

proc_pid_mounts(5)                       File Formats Manual                      proc_pid_mounts(5)

NAME
       /proc/pid/mounts - mounted filesystems

DESCRIPTION
       /proc/pid/mounts (since Linux 2.4.19)
              This file lists all the filesystems currently mounted in the process's mount namespace
              (see mount_namespaces(7)).  The format of this file is documented in fstab(5).

              Since  Linux  2.6.15,  this  file  is  pollable: after opening the file for reading, a
              change in this file (i.e., a filesystem mount or unmount) causes select(2) to mark the
              file descriptor as having an exceptional condition, and poll(2) and epoll_wait(2) mark
              the file as having a priority event (POLLPRI).  (Before Linux 2.6.30, a change in this
              file was indicated by the file descriptor being marked as readable for select(2),  and
              being marked as having an error condition for poll(2) and epoll_wait(2).)

       /proc/mounts
              Before  Linux 2.4.19, this file was a list of all the filesystems currently mounted on
              the system.  With the introduction of per-process mount  namespaces  in  Linux  2.4.19
              (see  mount_namespaces(7)),  this file became a link to /proc/self/mounts, which lists
              the mounts of the process's own mount namespace.  The format of  this  file  is  docu‐
              mented in fstab(5).

SEE ALSO
       proc(5)

Linux man-pages 6.7                          2023-08-15                           proc_pid_mounts(5)