diff options
Diffstat (limited to 'guix/build')
| -rw-r--r-- | guix/build/syscalls.scm | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/guix/build/syscalls.scm b/guix/build/syscalls.scm index 99a3b45004..7ea6b56e54 100644 --- a/guix/build/syscalls.scm +++ b/guix/build/syscalls.scm @@ -180,6 +180,8 @@ terminal-window-size terminal-columns terminal-rows + openpty + login-tty utmpx? utmpx-login-type @@ -2286,6 +2288,43 @@ PORT, trying to guess a reasonable value if all else fails. The result is always a positive integer." (terminal-dimension window-size-rows port (const 25))) +(define openpty + (let* ((ptr (dynamic-func "openpty" (dynamic-link "libutil"))) + (proc (pointer->procedure int ptr '(* * * * *) + #:return-errno? #t))) + (lambda () + "Return two file descriptors: one for the pseudo-terminal control side, +and one for the controlled side." + (let ((head (make-bytevector (sizeof int))) + (inferior (make-bytevector (sizeof int)))) + (let-values (((ret err) + (proc (bytevector->pointer head) + (bytevector->pointer inferior) + %null-pointer %null-pointer %null-pointer))) + (unless (zero? ret) + (throw 'system-error "openpty" "~A" + (list (strerror err)) + (list err)))) + + (let ((* (lambda (bv) + (bytevector-sint-ref bv 0 (native-endianness) + (sizeof int))))) + (values (* head) (* inferior))))))) + +(define login-tty + (let* ((ptr (dynamic-func "login_tty" (dynamic-link "libutil"))) + (proc (pointer->procedure int ptr (list int) + #:return-errno? #t))) + (lambda (fd) + "Make FD the controlling terminal of the current process (with the +TIOCSCTTY ioctl), redirect standard input, standard output and standard error +output to this terminal, and close FD." + (let-values (((ret err) (proc fd))) + (unless (zero? ret) + (throw 'system-error "login-pty" "~A" + (list (strerror err)) + (list err))))))) + ;;; ;;; utmpx. |