diff options
Diffstat (limited to 'man7/namespaces.7')
| -rw-r--r-- | man7/namespaces.7 | 37 |
1 files changed, 27 insertions, 10 deletions
diff --git a/man7/namespaces.7 b/man7/namespaces.7 index 23a228421b..248de394ef 100644 --- a/man7/namespaces.7 +++ b/man7/namespaces.7 @@ -92,16 +92,6 @@ is equivalent in namespace terms to: if (fork() == 0) /* if child */ unshare(CLONE_NEWXXX); -.SS Mount namespaces (CLONE_NEWNS) - -Mount namespaces isolate the set of file system mount points, -meaning that processes in different mount namespaces can -have different views of the file system hierarchy. -The set of mounts in a mount namespace is modified using -.BR mount (2) -and -.BR umount (2). - .SS IPC namespaces (CLONE_NEWIPC) IPC namespaces isolate certain IPC resources, @@ -121,6 +111,33 @@ directory, .I /sys/class/net directory, port numbers, and so on. +.SS Mount namespaces (CLONE_NEWNS) + +Mount namespaces isolate the set of file system mount points, +meaning that processes in different mount namespaces can +have different views of the file system hierarchy. +The set of mounts in a mount namespace is modified using +.BR mount (2) +and +.BR umount (2). + +The +.IR /proc/[pid]/mounts +file (present since Linux 2.4.19) +lists all the file systems currently mounted in the +process's mount namespace. +The format of this file is documented in +.BR fstab (5). +Since kernel version 2.6.15, this file is pollable: +after opening the file for reading, a change in this file +(i.e., a file system mount or unmount) causes +.BR select (2) +to mark the file descriptor as readable, and +.BR poll (2) +and +.BR epoll_wait (2) +mark the file as having an error condition. + .SS PID namespaces (CLONE_NEWPID) PID namespaces isolate the process ID number space, |