This new procedure uses BLKRRPART to determine whether or not a device is
busy. It is useful when a device does not appear as mounted but is maybe used
by the kernel. This is the case with overlayfs lowerdir backend device for
example.
* guix/build/syscalls.scm (device-in-use?): New exported procedure.
* guix/build/syscalls.scm (network-interface-running?): New variable.
Export it.
* tests/syscalls.scm: Add test.
Co-authored-by: John Darrington <jmd@gnu.org>
Reported by rennes@openmailbox.org.
* guix/build/syscalls.scm (file-type->symbol): New procedure.
(%struct-dirent-header): Rename to...
(%struct-dirent-header/linux): ... this. Rename introduced bindings as
well.
(%struct-dirent-header/hurd): New C struct.
(define-generic-identifier): New macro.
(read-dirent-header, %struct-dirent-header, sizeof-dirent-header):
Define in terms of 'define-generic-identifier'.
* guix/build/syscalls.scm (mount): Use Guile core mount if called from
static Guile, otherwise use FFI based mount implementation.
(umount): Ditto.
This allows to use (guix build syscalls) from a module independently
of calling context.
Signed-off-by: Ludovic Courtès <ludo@gnu.org>
Before that, something like:
(call-with-container
(lambda ()
(match (primitive-fork)
…)))
would hang in 'primitive-fork' as the child process (the one started in
the container) would try to pthread_join the finalization thread in
'stop_finalization_thread' in libguile, not knowing that this thread is
nonexistent.
* guix/build/syscalls.scm (%set-automatic-finalization-enabled?!): New
procedure.
(without-automatic-finalization): New macro.
(clone): Wrap PROC call in 'without-automatic-finalization'.
* guix/build/syscalls.scm (define-bits): Do not define NAMES... as
top-level variables since that prevents literal matches in 2.2.
Instead, determine constant values at expansion time.
* guix/build/syscalls.scm (<utmpx-entry>): New record type.
(%utmpx): New C struct.
(login-type): New bits.
(setutxent, endutxent, getutxent, utmpx-entries): New procedures.
* guix/build/syscalls.scm (SIOCADDRT, SIOCDELRT): New variables.
(%rtentry): New C struct.
(RTF_UP, RTF_GATEWAY, %sockaddr-any): New variables.
(add-network-route/gateway, delete-network-route): New procedures.
* tests/syscalls.scm ("add-network-route/gateway")
("delete-network-route"): New tests.
* guix/build/syscalls.scm (ifconf-struct): Remove.
(%ifconf-struct): New C struct.
(network-interface-names): Use 'make-bytevector' and 'write-ifconf!'
instead of 'make-c-struct', and 'read-ifconf' instead of
'parse-c-struct'.
* guix/build/syscalls.scm (errno): Do not export.
(syscall->procedure): Change to return a procedure that returns both the
value and errno. Use #:return-errno? where available.
(mount, umount, swapon, swapoff, mkdtemp!, fdatasync, statfs)
(clone, setns, pivot-root, fcntl-flock, network-interface-names)
(network-interface-flags, set-network-interface-flags)
(set-network-interface-address, network-interface-address):
(network-interfaces, tcgetattr, tcsetattr, terminal-window-size): Adjust
accordingly using 'let-values'.
Suggested by Danny Milosavljevic <dannym@scratchpost.org>
at <https://lists.gnu.org/archive/html/guix-devel/2016-06/msg00456.html>.
* guix/build/syscalls.scm (fdatasync): New procedure.
* guix/utils.scm (with-atomic-file-output): Use it. Use 'close-port'
instead of 'close'.
* guix/build/syscalls.scm (bits->symbols-body, define-bits)
(local-flags): New macros.
(TCSANOW, TCSADRAIN, TCSAFLUSH): New variables.
(<termios>): New record type.
(%termios): New C structure.
(tcgetattr, tcsetattr): New procedures.
* tests/syscalls.scm ("tcgetattr ENOTTY", "tcgetattr")
("tcsetattr"): New tests.
* guix/build/syscalls.scm (define-c-struct)[read]: OFFSET defaults to 0.
(unfold-interface-list): Remove second argument to 'read-ifaddrs'.
(terminal-window-size): Remove second argument to 'read-winsize'.
* guix/build/syscalls.scm (syscall->procedure): New procedure.
(mount, umount, swapon, swapoff, clone, pivot-root): Use it.
(clone): Add case for nonexistent syscall id.
Signed-off-by: Ludovic Courtès <ludo@gnu.org>
* guix/build/syscalls.scm (terminal-columns): Call
'terminal-window-size' only when PORT is a file port.
* tests/syscalls.scm ("terminal-columns non-file port"): New test.
Mathieu Othacehe