diff options
| -rw-r--r-- | gnu/services/shepherd.scm | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/gnu/services/shepherd.scm b/gnu/services/shepherd.scm index a8f6db9ce2..61f759a19d 100644 --- a/gnu/services/shepherd.scm +++ b/gnu/services/shepherd.scm @@ -344,6 +344,31 @@ as shepherd package." (use-modules (srfi srfi-34) (system repl error-handling)) + (define (call-with-file file flags proc) + (let ((port #f)) + (dynamic-wind + (lambda () + (set! port (open file flags))) + (lambda () + (proc port)) + (lambda () + (close-port port) + (set! port #f))))) + + ;; There's code run from shepherd that uses 'call-with-input-file' & + ;; co.--e.g., the 'urandom-seed' service. Starting from Shepherd + ;; 0.9.2, users need to make sure not to leak non-close-on-exec file + ;; descriptors to child processes. To address that, replace the + ;; standard bindings with O_CLOEXEC variants. + (set! call-with-input-file + (lambda (file proc) + (call-with-file file (logior O_RDONLY O_CLOEXEC) + proc))) + (set! call-with-output-file + (lambda (file proc) + (call-with-file file (logior O_WRONLY O_CREAT O_CLOEXEC) + proc))) + ;; Specify the default environment visible to all the services. ;; Without this statement, all the environment variables of PID 1 ;; are inherited by child services. |