diff options
| -rw-r--r-- | guix/build/syscalls.scm | 39 | ||||
| -rw-r--r-- | tests/syscalls.scm | 35 |
2 files changed, 74 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. diff --git a/tests/syscalls.scm b/tests/syscalls.scm index 706dd4177f..c9e011f453 100644 --- a/tests/syscalls.scm +++ b/tests/syscalls.scm @@ -26,6 +26,7 @@ #:use-module (srfi srfi-1) #:use-module (srfi srfi-26) #:use-module (srfi srfi-64) + #:use-module (srfi srfi-71) #:use-module (system foreign) #:use-module ((ice-9 ftw) #:select (scandir)) #:use-module (ice-9 match)) @@ -582,6 +583,40 @@ (test-assert "terminal-rows" (> (terminal-rows) 0)) +(test-assert "openpty" + (let ((head inferior (openpty))) + (and (integer? head) (integer? inferior) + (let ((port (fdopen inferior "r+0"))) + (and (isatty? port) + (begin + (close-port port) + (close-fdes head) + #t)))))) + +(test-equal "openpty + login-tty" + '(hello world) + (let ((head inferior (openpty))) + (match (primitive-fork) + (0 + (dynamic-wind + (const #t) + (lambda () + (setvbuf (current-input-port) 'none) + (close-fdes head) + (login-tty inferior) + (write (read)) + (read)) ;this gets EIO when HEAD is closed + (lambda () + (primitive-_exit 42)))) + (pid + (close-fdes inferior) + (let ((head (fdopen head "r+0"))) + (write '(hello world) head) + (let ((result (read head))) + (close-port head) + (waitpid pid) + result)))))) + (test-assert "utmpx-entries" (match (utmpx-entries) (((? utmpx? entries) ...) |