| #!/bin/sh | |
| exec guile -q -s "$0" "$@" | |
| !# | |
| ;;; test-sigaction-fork --- Signal thread vs. fork, again. | |
| ;;; | |
| ;;; Copyright (C) 2024 Free Software Foundation, Inc. | |
| ;;; | |
| ;;; This library is free software; you can redistribute it and/or | |
| ;;; modify it under the terms of the GNU Lesser General Public | |
| ;;; License as published by the Free Software Foundation; either | |
| ;;; version 3 of the License, or (at your option) any later version. | |
| ;;; | |
| ;;; This library is distributed in the hope that it will be useful, | |
| ;;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| ;;; Lesser General Public License for more details. | |
| ;;; | |
| ;;; You should have received a copy of the GNU Lesser General Public | |
| ;;; License along with this library; if not, write to the Free Software | |
| ;;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
| ;;; Test the bug described at <https://bugs.gnu.org/68087>: the signal | |
| ;;; thread would not be restarted after a call to 'primitive-fork', | |
| ;;; leading signals to be silently ignored. | |
| (use-modules (ice-9 match)) | |
| (define signals-handled | |
| ;; List of signals handled. | |
| '()) | |
| (define parent | |
| ;; PID of the parent process. | |
| (getpid)) | |
| (unless (provided? 'fork) | |
| (exit 77)) | |
| ;; This call spawns the signal delivery thread as a side effect. | |
| (sigaction SIGALRM | |
| (lambda (signal) | |
| (call-with-blocked-asyncs | |
| (lambda () | |
| (set! signals-handled | |
| (cons `(first-handler . ,(getpid)) | |
| signals-handled)))))) | |
| (kill (getpid) SIGALRM) | |
| (while (null? signals-handled) ;let the async run | |
| (sleep 1)) | |
| (match (primitive-fork) | |
| (0 | |
| (pk 'child (getpid) signals-handled) | |
| (kill (getpid) SIGALRM) ;first handler | |
| (sleep 1) ;let the async run | |
| (sigaction SIGALRM | |
| (lambda (signal) | |
| (call-with-blocked-asyncs | |
| (lambda () | |
| (set! signals-handled | |
| (cons `(second-handler . ,(getpid)) | |
| signals-handled)))))) | |
| (kill (getpid) SIGALRM) ;second handler | |
| (sleep 1) ;give asyncs one more chance to run | |
| (format (current-error-port) "signals handled by the child + parent: ~s~%" | |
| signals-handled) | |
| (exit (equal? signals-handled | |
| `((second-handler . ,(getpid)) | |
| (first-handler . ,(getpid)) | |
| (first-handler . ,parent))))) | |
| (child | |
| (kill (getpid) SIGALRM) ;first handler | |
| (sleep 1) ;give asyncs one more chance to run | |
| (format (current-error-port) "signals handled by the parent: ~s~%" | |
| signals-handled) | |
| (exit (and (equal? signals-handled | |
| `((first-handler . ,parent) | |
| (first-handler . ,parent))) | |
| (zero? (cdr (waitpid child))))))) | |
| ;;; Local Variables: | |
| ;;; mode: scheme | |
| ;;; End: | |