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authorrwatson <rwatson@FreeBSD.org>2007-12-31 16:45:27 +0000
committerrwatson <rwatson@FreeBSD.org>2007-12-31 16:45:27 +0000
commitb0c77eb80941a31f8f0c7e8d3d889bd8ca995cee (patch)
treee946ff5fc8752a755af205836bf09a0710523fd6 /tools/regression/sockets
parentf1b041f1e85fe8106bf879724f690dc5ab6065d6 (diff)
downloadFreeBSD-src-b0c77eb80941a31f8f0c7e8d3d889bd8ca995cee.zip
FreeBSD-src-b0c77eb80941a31f8f0c7e8d3d889bd8ca995cee.tar.gz
Add regression tests for UNIX domain socket garbage collection. Should be
run from single-user mode, as they look at global open file and inflight descriptor counts to check for leaks.
Diffstat (limited to 'tools/regression/sockets')
-rw-r--r--tools/regression/sockets/unix_gc/Makefile7
-rw-r--r--tools/regression/sockets/unix_gc/unix_gc.c763
2 files changed, 770 insertions, 0 deletions
diff --git a/tools/regression/sockets/unix_gc/Makefile b/tools/regression/sockets/unix_gc/Makefile
new file mode 100644
index 0000000..1e2fd56
--- /dev/null
+++ b/tools/regression/sockets/unix_gc/Makefile
@@ -0,0 +1,7 @@
+# $FreeBSD$
+
+PROG= unix_gc
+WARNS= 3
+NO_MAN=
+
+.include <bsd.prog.mk>
diff --git a/tools/regression/sockets/unix_gc/unix_gc.c b/tools/regression/sockets/unix_gc/unix_gc.c
new file mode 100644
index 0000000..347e501
--- /dev/null
+++ b/tools/regression/sockets/unix_gc/unix_gc.c
@@ -0,0 +1,763 @@
+/*-
+ * Copyright (c) 2007 Robert N. M. Watson
+ * All rights reserved.
+ *
+ * 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 AUTHOR 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 AUTHOR 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.
+ *
+ * $FreeBSD$
+ */
+
+/*
+ * A few regression tests for UNIX domain sockets. Run from single-user mode
+ * as it checks the openfiles sysctl to look for leaks, and we don't want that
+ * changing due to other processes doing stuff.
+ */
+
+#include <sys/types.h>
+#include <sys/signal.h>
+#include <sys/socket.h>
+#include <sys/sysctl.h>
+#include <sys/un.h>
+#include <sys/wait.h>
+
+#include <netinet/in.h>
+
+#include <err.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <limits.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+static int forcegc = 1;
+static char dpath[PATH_MAX];
+static const char *test;
+
+static int
+getopenfiles(void)
+{
+ size_t len;
+ int i;
+
+ len = sizeof(i);
+ if (sysctlbyname("kern.openfiles", &i, &len, NULL, 0) < 0)
+ err(-1, "kern.openfiles");
+ return (i);
+}
+
+static int
+getinflight(void)
+{
+ size_t len;
+ int i;
+
+ len = sizeof(i);
+ if (sysctlbyname("net.local.inflight", &i, &len, NULL, 0) < 0)
+ err(-1, "net.local.inflight");
+ return (i);
+}
+
+static void
+sendfd(int fd, int fdtosend)
+{
+ struct msghdr mh;
+ struct message { struct cmsghdr msg_hdr; int fd; } m;
+ ssize_t len;
+ int after_inflight, before_inflight;
+
+ before_inflight = getinflight();
+
+ bzero(&mh, sizeof(mh));
+ bzero(&m, sizeof(m));
+ mh.msg_control = &m;
+ mh.msg_controllen = sizeof(m);
+ m.msg_hdr.cmsg_len = sizeof(m);
+ m.msg_hdr.cmsg_level = SOL_SOCKET;
+ m.msg_hdr.cmsg_type = SCM_RIGHTS;
+ m.fd = fdtosend;
+ len = sendmsg(fd, &mh, 0);
+ if (len < 0)
+ err(-1, "%s: sendmsg", test);
+ after_inflight = getinflight();
+ if (after_inflight != before_inflight + 1)
+ errx(-1, "%s: sendfd: before %d after %d\n", test,
+ before_inflight, after_inflight);
+}
+
+static void
+close2(int fd1, int fd2)
+{
+
+ close(fd1);
+ close(fd2);
+}
+
+static void
+close3(int fd1, int fd2, int fd3)
+{
+
+ close2(fd1, fd2);
+ close(fd3);
+}
+
+static void
+close4(int fd1, int fd2, int fd3, int fd4)
+{
+
+ close2(fd1, fd2);
+ close2(fd3, fd4);
+}
+
+static void
+close5(int fd1, int fd2, int fd3, int fd4, int fd5)
+{
+
+ close3(fd1, fd2, fd3);
+ close2(fd4, fd5);
+}
+
+static int
+my_socket(int domain, int type, int proto)
+{
+ int sock;
+
+ sock = socket(domain, type, proto);
+ if (sock < 0)
+ err(-1, "%s: socket", test);
+ return (sock);
+}
+
+static void
+my_bind(int sock, struct sockaddr *sa, socklen_t len)
+{
+
+ if (bind(sock, sa, len) < 0)
+ err(-1, "%s: bind", test);
+}
+
+static void
+my_connect(int sock, struct sockaddr *sa, socklen_t len)
+{
+
+ if (connect(sock, sa, len) < 0)
+ err(-1, "%s: connect", test);
+}
+
+static void
+my_listen(int sock, int backlog)
+{
+
+ if (listen(sock, backlog) < 0)
+ err(-1, "%s: listen", test);
+}
+
+static void
+my_socketpair(int *sv)
+{
+
+ if (socketpair(PF_UNIX, SOCK_STREAM, 0, sv) < 0)
+ err(-1, "%s: socketpair", test);
+}
+
+static void
+my_getsockname(int s, struct sockaddr *sa, socklen_t *salen)
+{
+
+ if (getsockname(s, sa, salen) < 0)
+ err(-1, "%s: getsockname", test);
+}
+
+static void
+setnonblock(int s)
+{
+
+ if (fcntl(s, F_SETFL, O_NONBLOCK) < 0)
+ err(-1, "%s: fcntl(F_SETFL, O_NONBLOCK)", test);
+}
+
+static void
+alloc3fds(int *s, int *sv)
+{
+
+ if ((*s = socket(PF_UNIX, SOCK_STREAM, 0)) < 0)
+ err(-1, "%s: socket", test);
+ if (socketpair(PF_UNIX, SOCK_STREAM, 0, sv) < 0)
+ err(-1, "%s: socketpair", test);
+}
+
+static void
+alloc5fds(int *s, int *sva, int *svb)
+{
+
+ if ((*s = socket(PF_UNIX, SOCK_STREAM, 0)) < 0)
+ err(-1, "%s: socket", test);
+ if (socketpair(PF_UNIX, SOCK_STREAM, 0, sva) < 0)
+ err(-1, "%s: socketpair", test);
+ if (socketpair(PF_UNIX, SOCK_STREAM, 0, svb) < 0)
+ err(-1, "%s: socketpair", test);
+}
+
+static void
+save_sysctls(int *before_inflight, int *before_openfiles)
+{
+
+ *before_inflight = getinflight();
+ *before_openfiles = getopenfiles();
+}
+
+/*
+ * Try hard to make sure that the GC does in fact run before we test the
+ * condition of things.
+ */
+static void
+trigger_gc(void)
+{
+ int s;
+
+ if (forcegc) {
+ if ((s = socket(PF_UNIX, SOCK_STREAM, 0)) < 0)
+ err(-1, "trigger_gc: socket");
+ close(s);
+ }
+ sleep(1);
+}
+
+static void
+test_sysctls(int before_inflight, int before_openfiles)
+{
+ int after_inflight, after_openfiles;
+
+ trigger_gc();
+ after_inflight = getinflight();
+ if (after_inflight != before_inflight)
+ warnx("%s: before inflight: %d, after inflight: %d",
+ test, before_inflight, after_inflight);
+
+ after_openfiles = getopenfiles();
+ if (after_openfiles != before_openfiles)
+ warnx("%s: before: %d, after: %d", test, before_openfiles,
+ after_openfiles);
+}
+
+static void
+twosome_nothing(void)
+{
+ int inflight, openfiles;
+ int sv[2];
+
+ /*
+ * Create a pair, close in one order.
+ */
+ test = "twosome_nothing1";
+ printf("%s\n", test);
+ save_sysctls(&inflight, &openfiles);
+ my_socketpair(sv);
+ close2(sv[0], sv[1]);
+ test_sysctls(inflight, openfiles);
+
+ /*
+ * Create a pair, close in the other order.
+ */
+ test = "twosome_nothing2";
+ printf("%s\n", test);
+ save_sysctls(&inflight, &openfiles);
+ my_socketpair(sv);
+ close2(sv[0], sv[1]);
+ test_sysctls(inflight, openfiles);
+}
+
+/*
+ * Using a socket pair, send various endpoints over the pair and close in
+ * various orders.
+ */
+static void
+twosome_drop_work(const char *testname, int sendvia, int tosend, int closefirst)
+{
+ int inflight, openfiles;
+ int sv[2];
+
+ printf("%s\n", testname);
+ test = testname;
+ save_sysctls(&inflight, &openfiles);
+ my_socketpair(sv);
+ sendfd(sv[sendvia], sv[tosend]);
+ if (closefirst == 0)
+ close2(sv[0], sv[1]);
+ else
+ close2(sv[1], sv[0]);
+ test_sysctls(inflight, openfiles);
+}
+
+static void
+twosome_drop(void)
+{
+
+ /*
+ * In various combations, some wastefully symmetric, create socket
+ * pairs and send one or another endpoint over one or another
+ * endpoint, closing the endpoints in various orders.
+ */
+ twosome_drop_work("twosome_drop1", 0, 0, 0);
+ twosome_drop_work("twosome_drop2", 0, 0, 1);
+ twosome_drop_work("twosome_drop3", 0, 1, 0);
+ twosome_drop_work("twosome_drop4", 0, 1, 1);
+ twosome_drop_work("twosome_drop5", 1, 0, 0);
+ twosome_drop_work("twosome_drop6", 1, 0, 1);
+ twosome_drop_work("twosome_drop7", 1, 1, 0);
+ twosome_drop_work("twosome_drop8", 1, 1, 1);
+}
+
+static void
+threesome_nothing(void)
+{
+ int inflight, openfiles;
+ int s, sv[2];
+
+ test = "threesome_nothing";
+ printf("%s\n", test);
+ save_sysctls(&inflight, &openfiles);
+ alloc3fds(&s, sv);
+ close3(s, sv[0], sv[1]);
+ test_sysctls(inflight, openfiles);
+}
+
+/*
+ * threesome_drop: create a pair and a spare, send the spare over the pair, and
+ * close in various orders and make sure all the fds went away.
+ */
+static void
+threesome_drop(void)
+{
+ int inflight, openfiles;
+ int s, sv[2];
+
+ /*
+ * threesome_drop1: close sent send receive
+ */
+ test = "threesome_drop1";
+ printf("%s\n", test);
+ save_sysctls(&inflight, &openfiles);
+ alloc3fds(&s, sv);
+ sendfd(sv[0], s);
+ close3(s, sv[0], sv[1]);
+ test_sysctls(inflight, openfiles);
+
+ /*
+ * threesome_drop2: close sent receive send
+ */
+ test = "threesome_drop2";
+ printf("%s\n", test);
+ save_sysctls(&inflight, &openfiles);
+ alloc3fds(&s, sv);
+ sendfd(sv[0], s);
+ close3(s, sv[1], sv[0]);
+ test_sysctls(inflight, openfiles);
+
+ /*
+ * threesome_drop3: close receive sent send
+ */
+ test = "threesome_drop3";
+ printf("%s\n", test);
+ save_sysctls(&inflight, &openfiles);
+ alloc3fds(&s, sv);
+ sendfd(sv[0], s);
+ close3(sv[1], s, sv[0]);
+ test_sysctls(inflight, openfiles);
+
+ /*
+ * threesome_drop4: close receive send sent
+ */
+ test = "threesome_drop4";
+ printf("%s\n", test);
+ save_sysctls(&inflight, &openfiles);
+ alloc3fds(&s, sv);
+ sendfd(sv[0], s);
+ close3(sv[1], sv[0], s);
+ test_sysctls(inflight, openfiles);
+
+ /*
+ * threesome_drop5: close send receive sent
+ */
+ test = "threesome_drop5";
+ printf("%s\n", test);
+ save_sysctls(&inflight, &openfiles);
+ alloc3fds(&s, sv);
+ sendfd(sv[0], s);
+ close3(sv[0], sv[1], s);
+ test_sysctls(inflight, openfiles);
+
+ /*
+ * threesome_drop6: close send sent receive
+ */
+ test = "threesome_drop6";
+ printf("%s\n", test);
+ save_sysctls(&inflight, &openfiles);
+ alloc3fds(&s, sv);
+ close3(sv[0], s, sv[1]);
+ test_sysctls(inflight, openfiles);
+}
+
+/*
+ * Fivesome tests: create two socket pairs and a spare, send the spare over
+ * the first socket pair, then send the first socket pair over the second
+ * socket pair, and GC. Do various closes at various points to exercise
+ * various cases.
+ */
+static void
+fivesome_nothing(void)
+{
+ int inflight, openfiles;
+ int spare, sva[2], svb[2];
+
+ test = "fivesome_nothing";
+ printf("%s\n", test);
+ save_sysctls(&inflight, &openfiles);
+ alloc5fds(&spare, sva, svb);
+ close5(spare, sva[0], sva[1], svb[0], svb[1]);
+ test_sysctls(inflight, openfiles);
+}
+
+static void
+fivesome_drop_work(const char *testname, int close_spare_after_send,
+ int close_sva_after_send)
+{
+ int inflight, openfiles;
+ int spare, sva[2], svb[2];
+
+ printf("%s\n", testname);
+ test = testname;
+ save_sysctls(&inflight, &openfiles);
+ alloc5fds(&spare, sva, svb);
+
+ /*
+ * Send spare over sva.
+ */
+ sendfd(sva[0], spare);
+ if (close_spare_after_send)
+ close(spare);
+
+ /*
+ * Send sva over svb.
+ */
+ sendfd(svb[0], sva[0]);
+ sendfd(svb[0], sva[1]);
+ if (close_sva_after_send)
+ close2(sva[0], sva[1]);
+
+ close2(svb[0], svb[1]);
+
+ if (!close_sva_after_send)
+ close2(sva[0], sva[1]);
+ if (!close_spare_after_send)
+ close(spare);
+
+ test_sysctls(inflight, openfiles);
+}
+
+static void
+fivesome_drop(void)
+{
+
+ fivesome_drop_work("fivesome_drop1", 0, 0);
+ fivesome_drop_work("fivesome_drop2", 0, 1);
+ fivesome_drop_work("fivesome_drop3", 1, 0);
+ fivesome_drop_work("fivesome_drop4", 1, 1);
+}
+
+/*
+ * Create a somewhat nasty dual-socket socket intended to upset the garbage
+ * collector if mark-and-sweep is wrong.
+ */
+static void
+complex_cycles(void)
+{
+ int inflight, openfiles;
+ int spare, sva[2], svb[2];
+
+ test = "complex_cycles";
+ printf("%s\n", test);
+ save_sysctls(&inflight, &openfiles);
+ alloc5fds(&spare, sva, svb);
+ sendfd(sva[0], svb[0]);
+ sendfd(sva[0], svb[1]);
+ sendfd(svb[0], sva[0]);
+ sendfd(svb[0], sva[1]);
+ sendfd(svb[0], spare);
+ sendfd(sva[0], spare);
+ close5(spare, sva[0], sva[1], svb[0], svb[1]);
+ test_sysctls(inflight, openfiles);
+}
+
+/*
+ * Listen sockets can also be passed over UNIX domain sockets, so test
+ * various cases, including ones where listen sockets have waiting sockets
+ * hanging off them...
+ */
+static void
+listen_nothing(void)
+{
+ struct sockaddr_un sun;
+ struct sockaddr_in sin;
+ int inflight, openfiles;
+ int s;
+
+ test = "listen_nothing_unp";
+ printf("%s\n", test);
+ bzero(&sun, sizeof(sun));
+ sun.sun_family = AF_LOCAL;
+ sun.sun_len = sizeof(sun);
+ snprintf(sun.sun_path, sizeof(sun.sun_path), "%s/%s", dpath, test);
+ save_sysctls(&inflight, &openfiles);
+ s = my_socket(PF_LOCAL, SOCK_STREAM, 0);
+ my_bind(s, (struct sockaddr *)&sun, sizeof(sun));
+ my_listen(s, -1);
+ close(s);
+ (void)unlink(sun.sun_path);
+ test_sysctls(inflight, openfiles);
+
+ test = "listen_nothing_inet";
+ printf("%s\n", test);
+ bzero(&sin, sizeof(sin));
+ sin.sin_family = AF_INET;
+ sin.sin_len = sizeof(sin);
+ sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
+ sin.sin_port = htons(0);
+ save_sysctls(&inflight, &openfiles);
+ s = my_socket(PF_INET, SOCK_STREAM, 0);
+ my_bind(s, (struct sockaddr *)&sin, sizeof(sin));
+ my_listen(s, -1);
+ close(s);
+ test_sysctls(inflight, openfiles);
+}
+
+/*
+ * Send a listen UDP socket over a UNIX domain socket.
+ *
+ * Send a listen TCP socket over a UNIX domain socket.
+ *
+ * Do each twice, with closing of the listen socket vs. socketpair in
+ * different orders.
+ */
+static void
+listen_drop(void)
+{
+ struct sockaddr_un sun;
+ struct sockaddr_in sin;
+ int inflight, openfiles;
+ int s, sv[2];
+
+ bzero(&sun, sizeof(sun));
+ sun.sun_family = AF_LOCAL;
+ sun.sun_len = sizeof(sun);
+
+ /*
+ * Close listen socket first.
+ */
+ test = "listen_drop_unp1";
+ printf("%s\n", test);
+ snprintf(sun.sun_path, sizeof(sun.sun_path), "%s/%s", dpath, test);
+ save_sysctls(&inflight, &openfiles);
+ s = my_socket(PF_LOCAL, SOCK_STREAM, 0);
+ my_bind(s, (struct sockaddr *)&sun, sizeof(sun));
+ my_listen(s, -1);
+ my_socketpair(sv);
+ sendfd(sv[0], s);
+ close3(s, sv[0], sv[1]);
+ test_sysctls(inflight, openfiles);
+
+ /*
+ * Close socketpair first.
+ */
+ test = "listen_drop_unp2";
+ printf("%s\n", test);
+ snprintf(sun.sun_path, sizeof(sun.sun_path), "%s/%s", dpath, test);
+ save_sysctls(&inflight, &openfiles);
+ s = my_socket(PF_LOCAL, SOCK_STREAM, 0);
+ my_bind(s, (struct sockaddr *)&sun, sizeof(sun));
+ my_listen(s, -1);
+ my_socketpair(sv);
+ sendfd(sv[0], s);
+ close3(sv[0], sv[1], s);
+ test_sysctls(inflight, openfiles);
+
+ sin.sin_family = AF_INET;
+ sin.sin_len = sizeof(sin);
+ sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
+ sin.sin_port = htons(0);
+
+ /*
+ * Close listen socket first.
+ */
+ test = "listen_drop_inet1";
+ printf("%s\n", test);
+ bzero(&sun, sizeof(sun));
+ save_sysctls(&inflight, &openfiles);
+ s = my_socket(PF_INET, SOCK_STREAM, 0);
+ my_bind(s, (struct sockaddr *)&sin, sizeof(sin));
+ my_listen(s, -1);
+ my_socketpair(sv);
+ sendfd(sv[0], s);
+ close3(s, sv[0], sv[1]);
+ test_sysctls(inflight, openfiles);
+
+ /*
+ * Close socketpair first.
+ */
+ test = "listen_drop_inet2";
+ printf("%s\n", test);
+ bzero(&sun, sizeof(sun));
+ save_sysctls(&inflight, &openfiles);
+ s = my_socket(PF_INET, SOCK_STREAM, 0);
+ my_bind(s, (struct sockaddr *)&sin, sizeof(sin));
+ my_listen(s, -1);
+ my_socketpair(sv);
+ sendfd(sv[0], s);
+ close3(sv[0], sv[1], s);
+ test_sysctls(inflight, openfiles);
+}
+
+/*
+ * Up things a notch with listen sockets: add connections that can be
+ * accepted to the listen queues.
+ */
+static void
+listen_connect_nothing(void)
+{
+ struct sockaddr_in sin;
+ int slisten, sconnect, sv[2];
+ int inflight, openfiles;
+ socklen_t len;
+
+ test = "listen_connect_nothing";
+ printf("%s\n", test);
+ save_sysctls(&inflight, &openfiles);
+
+ slisten = my_socket(PF_INET, SOCK_STREAM, 0);
+ my_bind(slisten, (struct sockaddr *)&sin, sizeof(sin));
+ my_listen(slisten, -1);
+
+ my_socketpair(sv);
+
+ len = sizeof(sin);
+ my_getsockname(slisten, (struct sockaddr *)&sin, &len);
+
+ sconnect = my_socket(PF_INET, SOCK_STREAM, 0);
+ setnonblock(sconnect);
+ my_connect(sconnect, (struct sockaddr *)&sin, len);
+
+ sleep(1);
+
+ close4(slisten, sconnect, sv[0], sv[1]);
+
+ test_sysctls(inflight, openfiles);
+}
+
+static void
+listen_connect_drop(void)
+{
+ struct sockaddr_in sin;
+ int slisten, sconnect, sv[2];
+ int inflight, openfiles;
+ socklen_t len;
+
+ test = "listen_connect_drop";
+ printf("%s\n", test);
+ save_sysctls(&inflight, &openfiles);
+
+ slisten = my_socket(PF_INET, SOCK_STREAM, 0);
+ my_bind(slisten, (struct sockaddr *)&sin, sizeof(sin));
+ my_listen(slisten, -1);
+
+ my_socketpair(sv);
+
+ len = sizeof(sin);
+ my_getsockname(slisten, (struct sockaddr *)&sin, &len);
+
+ sconnect = my_socket(PF_INET, SOCK_STREAM, 0);
+ setnonblock(sconnect);
+ my_connect(sconnect, (struct sockaddr *)&sin, len);
+
+ sleep(1);
+ sendfd(sv[0], slisten);
+ close3(slisten, sv[0], sv[1]);
+ sleep(1);
+ close(sconnect);
+
+ test_sysctls(inflight, openfiles);
+}
+
+#define RMDIR "rm -Rf "
+int
+main(int argc, char *argv[])
+{
+ char cmd[sizeof(RMDIR) + PATH_MAX];
+ int serrno;
+ pid_t pid;
+
+ strlcpy(dpath, "/tmp/unpgc.XXXXXXXX", sizeof(dpath));
+ if (mkdtemp(dpath) == NULL)
+ err(-1, "mkdtemp");
+
+ /*
+ * Set up a parent process to GC temporary storage when we're done.
+ */
+ pid = fork();
+ if (pid < 0) {
+ serrno = errno;
+ (void)rmdir(dpath);
+ errno = serrno;
+ err(-1, "fork");
+ }
+ if (pid > 0) {
+ signal(SIGINT, SIG_IGN);
+ while (waitpid(pid, NULL, 0) != pid);
+ snprintf(cmd, sizeof(cmd), "%s %s", RMDIR, dpath);
+ (void)system(cmd);
+ exit(0);
+ }
+
+ printf("Start: inflight %d open %d\n", getinflight(),
+ getopenfiles());
+
+ twosome_nothing();
+ twosome_drop();
+
+ threesome_nothing();
+ threesome_drop();
+
+ fivesome_nothing();
+ fivesome_drop();
+
+ complex_cycles();
+
+ listen_nothing();
+ listen_drop();
+
+ listen_connect_nothing();
+ listen_connect_drop();
+
+ printf("Finish: inflight %d open %d\n", getinflight(),
+ getopenfiles());
+ return (0);
+}
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