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syscalls: Use define-as-needed for mount and umount.

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* guix/build/syscalls.scm (mount): Use define-as-needed macro
and remove from export list.
(umount): Ditto.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>
This commit is contained in:
Mathieu Othacehe 2017-04-10 19:18:11 +02:00 committed by Ludovic Courtès
parent 8336df0668
commit 7df4d3465d
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GPG key ID: 090B11993D9AEBB5
1 changed files with 37 additions and 47 deletions
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84
guix/build/syscalls.scm
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@ -45,8 +45,6 @@ (define-module (guix build syscalls)
MNT_EXPIRE
UMOUNT_NOFOLLOW
restart-on-EINTR
mount
umount
mount-points
swapon
swapoff
@ -492,58 +490,50 @@ (define MNT_DETACH 2)
(define MNT_EXPIRE 4)
(define UMOUNT_NOFOLLOW 8)
(define mount
;; If called from the statically linked Guile, use Guile core 'mount'.
;; Otherwise, use an FFI binding to define 'mount'.
;; XXX: '#:update-mtab?' is not implemented by core 'mount'.
(if (module-defined? the-scm-module 'mount)
(module-ref the-scm-module 'mount)
(let ((proc (syscall->procedure int "mount" `(* * * ,unsigned-long *))))
(lambda* (source target type #:optional (flags 0) options
(define-as-needed (mount source target type
#:optional (flags 0) options
#:key (update-mtab? #f))
"Mount device SOURCE on TARGET as a file system TYPE.
"Mount device SOURCE on TARGET as a file system TYPE.
Optionally, FLAGS may be a bitwise-or of the MS_* <sys/mount.h>
constants, and OPTIONS may be a string. When FLAGS contains
MS_REMOUNT, SOURCE and TYPE are ignored. When UPDATE-MTAB? is true,
update /etc/mtab. Raise a 'system-error' exception on error."
(let-values (((ret err)
(proc (if source
(string->pointer source)
%null-pointer)
(string->pointer target)
(if type
(string->pointer type)
%null-pointer)
flags
(if options
(string->pointer options)
%null-pointer))))
(unless (zero? ret)
(throw 'system-error "mount" "mount ~S on ~S: ~A"
(list source target (strerror err))
(list err)))
(when update-mtab?
(augment-mtab source target type options)))))))
;; XXX: '#:update-mtab?' is not implemented by core 'mount'.
(let ((proc (syscall->procedure int "mount" `(* * * ,unsigned-long *))))
(let-values (((ret err)
(proc (if source
(string->pointer source)
%null-pointer)
(string->pointer target)
(if type
(string->pointer type)
%null-pointer)
flags
(if options
(string->pointer options)
%null-pointer))))
(unless (zero? ret)
(throw 'system-error "mount" "mount ~S on ~S: ~A"
(list source target (strerror err))
(list err)))
(when update-mtab?
(augment-mtab source target type options)))))
(define umount
;; If called from the statically linked Guile, use Guile core 'umount'.
;; Otherwise, use an FFI binding to define 'umount'.
;; XXX: '#:update-mtab?' is not implemented by core 'umount'.
(if (module-defined? the-scm-module 'umount)
(module-ref the-scm-module 'umount)
(let ((proc (syscall->procedure int "umount2" `(* ,int))))
(lambda* (target #:optional (flags 0)
#:key (update-mtab? #f))
"Unmount TARGET. Optionally FLAGS may be one of the MNT_* or UMOUNT_*
(define-as-needed (umount target
#:optional (flags 0)
#:key (update-mtab? #f))
"Unmount TARGET. Optionally FLAGS may be one of the MNT_* or UMOUNT_*
constants from <sys/mount.h>."
(let-values (((ret err)
(proc (string->pointer target) flags)))
(unless (zero? ret)
(throw 'system-error "umount" "~S: ~A"
(list target (strerror err))
(list err)))
(when update-mtab?
(remove-from-mtab target)))))))
;; XXX: '#:update-mtab?' is not implemented by core 'umount'.
(let ((proc (syscall->procedure int "umount2" `(* ,int))))
(let-values (((ret err)
(proc (string->pointer target) flags)))
(unless (zero? ret)
(throw 'system-error "umount" "~S: ~A"
(list target (strerror err))
(list err)))
(when update-mtab?
(remove-from-mtab target)))))
(define (mount-points)
"Return the mounts points for currently mounted file systems."