Date: Wed, 4 Jul 2018 18:01:53 +0000 (UTC) From: Ed Maste <emaste@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-11@freebsd.org Subject: svn commit: r335964 - stable/11/lib/libutil/tests Message-ID: <201807041801.w64I1r1Y047866@repo.freebsd.org>
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Author: emaste Date: Wed Jul 4 18:01:53 2018 New Revision: 335964 URL: https://svnweb.freebsd.org/changeset/base/335964 Log: MFC r306098 (br): Use kqueue(2) instead of select(2). This helps to ensure we will not lose SIGINT sent by parent to child. PR: 212562, 228492 Modified: stable/11/lib/libutil/tests/pidfile_test.c Directory Properties: stable/11/ (props changed) Modified: stable/11/lib/libutil/tests/pidfile_test.c ============================================================================== --- stable/11/lib/libutil/tests/pidfile_test.c Wed Jul 4 17:18:35 2018 (r335963) +++ stable/11/lib/libutil/tests/pidfile_test.c Wed Jul 4 18:01:53 2018 (r335964) @@ -30,6 +30,7 @@ __FBSDID("$FreeBSD$"); #include <sys/param.h> #include <sys/wait.h> +#include <sys/event.h> #include <fcntl.h> #include <errno.h> @@ -43,8 +44,8 @@ __FBSDID("$FreeBSD$"); #include <libutil.h> /* - * We need a signal handler so kill(2) will interrupt our child's - * select(2) instead of killing it. + * We need a signal handler so kill(2) will interrupt the child + * instead of killing it. */ static void signal_handler(int sig) @@ -129,7 +130,9 @@ common_test_pidfile_child(const char *fn, int parent_o struct pidfh *pf = NULL; pid_t other = 0, pid = 0; int fd[2], serrno, status; + struct kevent event, ke; char ch; + int kq; unlink(fn); if (pipe(fd) != 0) @@ -166,10 +169,20 @@ common_test_pidfile_child(const char *fn, int parent_o if (pf == NULL) _exit(1); if (pidfile_write(pf) != 0) - _exit(1); + _exit(2); + kq = kqueue(); + if (kq == -1) + _exit(3); + EV_SET(&ke, SIGINT, EVFILT_SIGNAL, EV_ADD, 0, 0, NULL); + /* Attach event to the kqueue. */ + if (kevent(kq, &ke, 1, NULL, 0, NULL) != 0) + _exit(4); + /* Inform the parent we are ready to receive SIGINT */ if (write(fd[1], "*", 1) != 1) - _exit(1); - select(0, 0, 0, 0, 0); + _exit(5); + /* Wait for SIGINT received */ + if (kevent(kq, NULL, 0, &event, 1, NULL) != 1) + _exit(6); _exit(0); } // parent
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