# proc_pid_mounts - mounted filesystems - man(5) - [phpMan]

[_proc_pid_mounts_(5)](https://www.chedong.com/phpMan.php/man/procpidmounts/5/markdown)                       File Formats Manual                      [_proc_pid_mounts_(5)](https://www.chedong.com/phpMan.php/man/procpidmounts/5/markdown)

## 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)](https://www.chedong.com/phpMan.php/man/mountnamespaces/7/markdown)).  The format of this file is documented in [**fstab**(5)](https://www.chedong.com/phpMan.php/man/fstab/5/markdown).

              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)](https://www.chedong.com/phpMan.php/man/select/2/markdown) to mark the
              file descriptor as having an exceptional condition, and [**poll**(2)](https://www.chedong.com/phpMan.php/man/poll/2/markdown) and [**epoll_wait**(2)](https://www.chedong.com/phpMan.php/man/epollwait/2/markdown) 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)](https://www.chedong.com/phpMan.php/man/select/2/markdown),  and
              being marked as having an error condition for [**poll**(2)](https://www.chedong.com/phpMan.php/man/poll/2/markdown) and [**epoll_wait**(2)](https://www.chedong.com/phpMan.php/man/epollwait/2/markdown).)

       _/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)](https://www.chedong.com/phpMan.php/man/mountnamespaces/7/markdown)),  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)](https://www.chedong.com/phpMan.php/man/fstab/5/markdown).

## SEE ALSO
       [**proc**(5)](https://www.chedong.com/phpMan.php/man/proc/5/markdown)

Linux man-pages 6.7                          2023-08-15                           [_proc_pid_mounts_(5)](https://www.chedong.com/phpMan.php/man/procpidmounts/5/markdown)