Date: Wed, 21 Sep 2016 11:59:53 +0000 (UTC) From: Ruslan Bukin <br@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r306098 - head/lib/libutil/tests Message-ID: <201609211159.u8LBxrTT031917@repo.freebsd.org>
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Author: br Date: Wed Sep 21 11:59:52 2016 New Revision: 306098 URL: https://svnweb.freebsd.org/changeset/base/306098 Log: Use kqueue(2) instead of select(2). This helps to ensure we will not lose SIGINT sent by parent to child. Reviewed by: sbruno, ngie Sponsored by: DARPA, AFRL Sponsored by: HEIF5 Differential Revision: https://reviews.freebsd.org/D7892 Modified: head/lib/libutil/tests/pidfile_test.c Modified: head/lib/libutil/tests/pidfile_test.c ============================================================================== --- head/lib/libutil/tests/pidfile_test.c Wed Sep 21 11:31:58 2016 (r306097) +++ head/lib/libutil/tests/pidfile_test.c Wed Sep 21 11:59:52 2016 (r306098) @@ -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 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 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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