Subject: [PATCH 1/6] tests: add extra-ports.sh test.

From: ulfvonbelow <[email-masked]>
Date: Fri, 18 Aug 2023 15:22:34 -0500

* tests/extra-ports.sh: new test.
---
 tests/extra-ports.sh | 76 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 76 insertions(+)
 create mode 100644 tests/extra-ports.sh

diff --git a/tests/extra-ports.sh b/tests/extra-ports.sh
new file mode 100644
index 0000000..51b91b7
--- /dev/null
+++ b/tests/extra-ports.sh
@@ -0,0 +1,76 @@
+socket="t-socket-$$"
+conf="t-conf-$$"
+log="t-log-$$"
+pid="t-pid-$$"
+testfile1="t-testfile1-$$"
+testfile2="t-testfile2-$$"
+resultfile="t-resultfile-$$"
+
+herd="herd -s $socket"
+
+trap "cat $log || true;
+      rm -f $socket $conf $log $testfile1 $testfile2 $resultfile;
+      test -f $pid && kill \`cat $pid\` || true; rm -f $pid" EXIT
+
+printf "test1" > "$testfile1"
+printf "test2" > "$testfile2"
+
+cat > "$conf"<<EOF
+(register-services
+ (list (service
+        '(test-extra-ports)
+        #:requirement '()
+        #:start (lambda _
+                  (call-with-input-file "$testfile1"
+                    (lambda (test1)
+                      (call-with-input-file "$testfile2"
+                        (lambda (test2)
+                          ;; test1 and test2 should hopefully have adjacent fds
+                          (define ports
+                            (append
+                             ;; Fill up the fd range so that the source and
+                             ;; destination ranges overlap
+                             (map (const test1)
+                                  (iota (- (min (fileno test1)
+                                                (fileno test2))
+                                           3)))
+                             (sort (list test1 test2)
+                                   (lambda (a b)
+                                     (> (fileno a)
+                                        (fileno b))))))
+
+                          (define command
+                            (list
+                             "sh"
+                             "-c"
+                             (string-append
+                              "set -x;"
+                              " cat >> ${resultfile}.tmp <&" (number->string
+                                                              (fileno test1))
+                              "; cat >> ${resultfile}.tmp <&" (number->string
+                                                               (fileno test2))
+                              "; mv ${resultfile}.tmp ${resultfile}")))
+
+                          (fork+exec-command command
+                                             #:extra-ports
+                                             ports
+                                             #:directory
+                                             "$(pwd)"))))))
+        #:stop (const #f)
+        #:respawn? #f)))
+EOF
+
+rm -f "$pid"
+shepherd -I -s "$socket" -c "$conf" -l "$log" --pid="$pid" &
+
+while ! test -f "$pid" ; do sleep 0.3 ; done
+
+shepherd_pid="`cat $pid`"
+kill -0 $shepherd_pid
+
+$herd start test-extra-ports
+
+while ! test -f "$resultfile" ; do sleep 0.3 ; done
+
+result="$(cat $resultfile)"
+test "$result" = "test1test2" -o "$result" = "test2test1"
-- 
2.40.1