system: Add /dev/shm.

* gnu/system/file-systems.scm (%shared-memory-file-system): New
  variable.
  (%base-file-systems): Add it.
* doc/guix.texi (File Systems): Document it.
This commit is contained in:
Ludovic Courtès 2014-07-23 01:25:01 +02:00
parent 2c071ce96e
commit db17ae5c27
2 changed files with 19 additions and 1 deletions

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@ -3084,6 +3084,12 @@ Manual}). Pseudo-terminals are used by terminal emulators such as
@command{xterm}.
@end defvr
@defvr {Scheme Variable} %shared-memory-file-system
This file system is mounted as @file{/dev/shm} and is used to support
memory sharing across processes (@pxref{Memory-mapped I/O,
@code{shm_open},, libc, The GNU C Library Reference Manual}).
@end defvr
@defvr {Scheme Variable} %binary-format-file-system
The @code{binfmt_misc} file system, which allows handling of arbitrary
executable file types to be delegated to user space. This requires the

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@ -108,10 +108,22 @@
(create-mount-point? #t)
(options (string-append "gid=" (number->string %tty-gid) ",mode=620"))))
(define %shared-memory-file-system
;; Shared memory.
(file-system
(device "tmpfs")
(mount-point "/dev/shm")
(type "tmpfs")
(check? #f)
(flags '(no-suid no-dev))
(options "size=50%") ;TODO: make size configurable
(create-mount-point? #t)))
(define %base-file-systems
;; List of basic file systems to be mounted. Note that /proc and /sys are
;; currently mounted by the initrd.
(list %devtmpfs-file-system
%pseudo-terminal-file-system))
%pseudo-terminal-file-system
%shared-memory-file-system))
;;; file-systems.scm ends here