Man page - proc_mounts(5)

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Manual

proc_pid_mounts

NAME
DESCRIPTION
SEE ALSO

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 documented in fstab (5).