summaryrefslogtreecommitdiffstats
path: root/tools/test/posixshm
diff options
context:
space:
mode:
authorwollman <wollman@FreeBSD.org>2000-04-22 15:29:21 +0000
committerwollman <wollman@FreeBSD.org>2000-04-22 15:29:21 +0000
commitbf9193e8ba2ad2dfe6268d45955e42b58ca05032 (patch)
tree757ccd3d18b3019a6383c323fa036a1909fa967f /tools/test/posixshm
parent32fbc9e863be198e0effc829f64834dc543425aa (diff)
downloadFreeBSD-src-bf9193e8ba2ad2dfe6268d45955e42b58ca05032.zip
FreeBSD-src-bf9193e8ba2ad2dfe6268d45955e42b58ca05032.tar.gz
Add a little test program to demonstrate POSIX Shared Memory Objects.
Diffstat (limited to 'tools/test/posixshm')
-rw-r--r--tools/test/posixshm/README4
-rw-r--r--tools/test/posixshm/shm_test.c144
2 files changed, 148 insertions, 0 deletions
diff --git a/tools/test/posixshm/README b/tools/test/posixshm/README
new file mode 100644
index 0000000..514e18b
--- /dev/null
+++ b/tools/test/posixshm/README
@@ -0,0 +1,4 @@
+$FreeBSD$
+
+This is a simple program to test/demonstrate the POSIX Shared Memory
+Objects feature set. `make shm_test' to build.
diff --git a/tools/test/posixshm/shm_test.c b/tools/test/posixshm/shm_test.c
new file mode 100644
index 0000000..6cee558
--- /dev/null
+++ b/tools/test/posixshm/shm_test.c
@@ -0,0 +1,144 @@
+/*
+ * Test the POSIX shared-memory API.
+ * Dedicated to tyhe public domain by Garrett A. Wollman, 2000.
+ * $FreeBSD$
+ */
+
+#include <sys/types.h>
+#include <sys/mman.h>
+#include <sys/wait.h>
+
+#include <err.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+/*
+ * Signal handler which does nothing.
+ */
+static void
+ignoreit(int sig)
+{
+ ;
+}
+
+int
+main(int argc, char **argv)
+{
+ char buf[1024], *cp;
+ int desc, rv;
+ long scval;
+ sigset_t ss;
+ struct sigaction sa;
+ void *region;
+ size_t psize;
+
+#ifndef _POSIX_SHARED_MEMORY_OBJECTS
+ printf("_POSIX_SHARED_MEMORY_OBJECTS is undefined\n");
+#else
+ printf("_POSIX_SHARED_MEMORY_OBJECTS is defined as %ld\n",
+ (long)_POSIX_SHARED_MEMORY_OBJECTS - 0);
+ if (_POSIX_SHARED_MEMORY_OBJECTS - 0 == -1)
+ printf("***Indicates this feature may be unsupported!\n");
+#endif
+ errno = 0;
+ scval = sysconf(_SC_SHARED_MEMORY_OBJECTS);
+ if (scval == -1 && errno != 0) {
+ err(1, "sysconf(_SC_SHARED_MEMORY_OBJECTS)");
+ } else {
+ printf("sysconf(_SC_SHARED_MEMORY_OBJECTS) returns %ld\n",
+ scval);
+ if (scval == -1)
+ printf("***Indicates this feature is unsupported!\n");
+ }
+
+ errno = 0;
+ scval = sysconf(_SC_PAGESIZE);
+ if (scval == -1 && errno != 0) {
+ err(1, "sysconf(_SC_PAGESIZE)");
+ } else if (scval <= 0 || (size_t)psize != psize) {
+ warnx("bogus return from sysconf(_SC_PAGESIZE): %ld",
+ scval);
+ psize = 4096;
+ } else {
+ printf("sysconf(_SC_PAGESIZE) returns %ld\n", scval);
+ psize = scval;
+ }
+
+ argc--, argv++;
+
+ if (*argv) {
+ strncat(buf, *argv, (sizeof buf) - 1);
+ desc = shm_open(buf, O_EXCL | O_CREAT | O_RDWR, 0600);
+ } else {
+ do {
+ /*
+ * Can't use mkstemp for obvious reasons...
+ */
+ strcpy(buf, "/tmp/shmtest.XXXXXXXXXXXX");
+ mktemp(buf);
+ desc = shm_open(buf, O_EXCL | O_CREAT | O_RDWR, 0600);
+ } while (desc < 0 && errno == EEXIST);
+ }
+
+ if (desc < 0)
+ err(1, "shm_open");
+
+ if (shm_unlink(buf) < 0)
+ err(1, "shm_unlink");
+
+ if (ftruncate(desc, (off_t)psize) < 0)
+ err(1, "ftruncate");
+
+ region = mmap((void *)0, psize, PROT_READ | PROT_WRITE, MAP_SHARED,
+ desc, (off_t)0);
+ if (region == MAP_FAILED)
+ err(1, "mmap");
+ memset(region, '\377', psize);
+
+ sa.sa_flags = 0;
+ sa.sa_handler = ignoreit;
+ sigemptyset(&sa.sa_mask);
+ if (sigaction(SIGUSR1, &sa, (struct sigaction *)0) < 0)
+ err(1, "sigaction");
+
+ sigemptyset(&ss);
+ sigaddset(&ss, SIGUSR1);
+ if (sigprocmask(SIG_BLOCK, &ss, (sigset_t *)0) < 0)
+ err(1, "sigprocmask");
+
+ rv = fork();
+ if (rv < 0) {
+ err(1, "fork");
+ } else if (rv == 0) {
+ sigemptyset(&ss);
+ sigsuspend(&ss);
+
+ for (cp = region; cp < (char *)region + psize; cp++)
+ if (*cp != '\151')
+ _exit(1);
+ _exit(0);
+ } else {
+ int status;
+
+ memset(region, '\151', psize);
+ kill(rv, SIGUSR1);
+ waitpid(rv, &status, 0);
+
+ if (WIFEXITED(status) && WEXITSTATUS(status) == 0) {
+ printf("Functionality test successful\n");
+ exit(0);
+ } else if (WIFEXITED(status)) {
+ printf("Child process exited with status %d\n",
+ WEXITSTATUS(status));
+ } else {
+ printf("Child process terminated with %s\n",
+ strsignal(WTERMSIG(status)));
+ }
+ }
+ exit(1);
+}
OpenPOWER on IntegriCloud