1 files changed, 219 insertions, 0 deletions

diff --git a/src/regress/lib/libc/sys/t_select.c b/src/regress/lib/libc/sys/t_select.c
new file mode 100644
index 0000000000..94ff3d3410
--- /dev/null
+++ b/src/regress/lib/libc/sys/t_select.c
@@ -0,0 +1,219 @@
+/*      $OpenBSD: t_select.c,v 1.1.1.1 2019/11/19 19:57:04 bluhm Exp $  */
+/*      $NetBSD: t_select.c,v 1.4 2017/01/13 21:18:33 christos Exp $ */
+
+/*-
+ * Copyright (c) 2011 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundatiom
+ * by Christos Zoulas.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "macros.h"
+
+#include <assert.h>
+#include <sys/types.h>
+#include <sys/select.h>
+#include <sys/wait.h>
+#include <err.h>
+#include <stdio.h>
+#include <string.h>
+#include <signal.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <errno.h>
+#include <fcntl.h>
+
+#include "atf-c.h"
+
+static sig_atomic_t keep_going = 1;
+
+static void
+sig_handler(int signum __unused)
+{
+        keep_going = 0;
+}
+
+static void
+sigchld(int signum __unused)
+{
+}
+
+static char
+xtoa(uint8_t n)
+{
+        static const char xarray[] = "0123456789abcdef";
+        assert(n < sizeof(xarray));
+        return xarray[n];
+}
+
+static const char *
+prmask(const sigset_t *m, char *buf, size_t len)
+{
+        size_t j = 2;
+        assert(len >= 3 + sizeof(*m));
+        buf[0] = '0';
+        buf[1] = 'x';
+#define N(p, a) (((p) >> ((a) * 4)) & 0xf)
+        /* Adjusted for OpenBSD, on NetBSD sigset_t is a struct */
+        uint32_t p = (*m);
+        for (size_t k = sizeof(p); k > 0; k--)
+                buf[j++] = xtoa(N(p, k - 1));
+        buf[j] = '\0';
+        return buf;
+}
+
+static __dead void
+child(const struct timespec *ts)
+{
+        struct sigaction sa;
+        sigset_t set, oset, nset;
+        char obuf[sizeof(oset) + 3], nbuf[sizeof(nset) + 3];
+        int fd;
+
+        memset(&sa, 0, sizeof(sa));
+        sa.sa_handler = sig_handler;
+        if ((fd = open("/dev/null", O_RDONLY)) == -1)
+                err(1, "open");
+
+        if (sigaction(SIGTERM, &sa, NULL) == -1)
+                err(1, "sigaction");
+
+        sigfillset(&set);
+        if (sigprocmask(SIG_BLOCK, &set, NULL) == -1)
+                err(1, "sigprocmask");
+
+        if (sigprocmask(SIG_BLOCK, NULL, &oset) == -1)
+                err(1, "sigprocmask");
+
+        sigemptyset(&set);
+
+        for (;;) {
+                fd_set rset;
+                FD_ZERO(&rset);
+                FD_SET(fd, &rset);
+                if (pselect(1, &rset, NULL, NULL, ts, &set) == -1) {
+                        if(errno == EINTR) {
+                                if (!keep_going)
+                                        break;
+                        }
+                }
+                if (ts)
+                        break;
+        }
+        if (sigprocmask(SIG_BLOCK, NULL, &nset) == -1)
+                err(1, "sigprocmask");
+        if (memcmp(&oset, &nset, sizeof(oset)) != 0)
+                atf_tc_fail("pselect() masks don't match "
+                    "after timeout %s != %s",
+                    prmask(&nset, nbuf, sizeof(nbuf)),
+                    prmask(&oset, obuf, sizeof(obuf)));
+        _exit(0);
+}
+
+ATF_TC(pselect_sigmask);
+ATF_TC_HEAD(pselect_sigmask, tc)
+{
+        atf_tc_set_md_var(tc, "descr", "Checks pselect's temporary mask "
+            "setting when a signal is received (PR lib/43625)");
+}
+
+ATF_TC_BODY(pselect_sigmask, tc)
+{
+        pid_t pid;
+        int status;
+
+        signal(SIGCHLD, sigchld);
+
+        switch (pid = fork()) {
+        case 0:
+                child(NULL);
+                /*NOTREACHED*/
+        case -1:
+                err(1, "fork");
+        default:
+                sleep(1);
+                if (kill(pid, SIGTERM) == -1)
+                        err(1, "kill");
+                sleep(1);
+                switch (waitpid(pid, &status, WNOHANG)) {
+                case -1:
+                        err(1, "wait");
+                case 0:
+                        if (kill(pid, SIGKILL) == -1)
+                                err(1, "kill");
+                        atf_tc_fail("pselect() did not receive signal");
+                        break;
+                default:
+                        break;
+                }
+        }
+}
+
+ATF_TC(pselect_timeout);
+ATF_TC_HEAD(pselect_timeout, tc)
+{
+
+        atf_tc_set_md_var(tc, "descr", "Checks pselect's temporary mask "
+            "setting when a timeout occurs");
+}
+
+ATF_TC_BODY(pselect_timeout, tc)
+{
+        pid_t pid;
+        int status;
+        static const struct timespec zero = { 0, 0 };
+
+        signal(SIGCHLD, sigchld);
+
+        switch (pid = fork()) {
+        case 0:
+                child(&zero);
+                break;
+        case -1:
+                err(1, "fork");
+        default:
+                sleep(1);
+                switch (waitpid(pid, &status, WNOHANG)) {
+                case -1:
+                        err(1, "wait");
+                case 0:
+                        if (kill(pid, SIGKILL) == -1)
+                                err(1, "kill");
+                        atf_tc_fail("pselect() did not receive signal");
+                        break;
+                default:
+                        break;
+                }
+        }
+}
+
+ATF_TP_ADD_TCS(tp)
+{
+
+        ATF_TP_ADD_TC(tp, pselect_sigmask);
+        ATF_TP_ADD_TC(tp, pselect_timeout);
+
+        return atf_no_error();
+}