File Systems & Mount Control

Mount and Unmount File Systems

mount

Supported functionality in SCML:

// Create a new mount
mount(
    source, target, filesystemtype,
    mountflags = 0,
    data
);

// Move the existing mount point
mount(
    source, target, filesystemtype,
    mountflags = MS_MOVE,
    data
);

// Create a bind mount
mount(
    source, target, filesystemtype,
    mountflags = MS_BIND | MS_REC,
    data
);

Partially supported mount flags:

• MS_REC is only effective when used in conjunction with MS_BIND
• MS_REMOUNT can be used, but the set options have no actual effect.
• MS_DIRSYNC can be set but have no actual effect.
• MS_LAZYTIME can be set but have no actual effect.
• MS_MANDLOCK can be set but have no actual effect.
• MS_NOATIME can be set but have no actual effect.
• MS_NODEV can be set but have no actual effect.
• MS_NODIRATIME can be set but have no actual effect.
• MS_NOEXEC can be set but have no actual effect.
• MS_NOSUID can be set but have no actual effect.
• MS_RDONLY can be set but have no actual effect.
• MS_RELATIME can be set but have no actual effect.
• MS_SILENT can be set but have no actual effect.
• MS_STRICTATIME can be set but have no actual effect.
• MS_SYNCHRONOUS can be set but have no actual effect.

Unsupported mount flags:

• MS_SHARED
• MS_SLAVE
• MS_UNBINDABLE

For more information, see the man page.

umount and umount2

Supported functionality in SCML:

// Unmount a mounted file system
umount(target);

// Unmount a mounted file system with enhanced behavior control
umount2(target, flags = UMOUNT_NOFOLLOW);

Silently-ignored flags:

• MNT_FORCE
• MNT_DETACH
• MNT_EXPIRE

For more information, see the man page.