summaryrefslogtreecommitdiff
path: root/tools/testing/selftests/watchdog/watchdog-test.c
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2016-10-14 15:17:12 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2016-10-14 15:17:12 -0700
commit5d89d9f502f9c33ed0270d716f238429861e1942 (patch)
tree6a353640e6836ca465f2dcf00323a7f8a793ae59 /tools/testing/selftests/watchdog/watchdog-test.c
parent50cff89837a43a7c62ac080de9742a298d6418b3 (diff)
parentfecf861e765b2f9ce1a0487c3940afaed80ef7a8 (diff)
Merge tag 'linux-kselftest-4.9-rc1-update' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest
Pull kselftest updates from Shuah Khan: "This update consists of: - Fixes and improvements to existing tests - Moving code from Documentation to selftests, samples, and tools: * Moves dnotify_test, prctl, ptp, vDSO, ia64, watchdog, and networking tests from Documentation to selftests. * Moves mic/mpssd, misc-devices/mei, timers, watchdog, auxdisplay, and blackfin examples from Documentation to samples. * Moves accounting, laptops/dslm, and pcmcia/crc32hash tools from Documentation to tools. * Deletes BUILD_DOCSRC and its dependencies" * tag 'linux-kselftest-4.9-rc1-update' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest: (21 commits) selftests/futex: Check ANSI terminal color support Doc: update 00-INDEX files to reflect the runnable code move samples: move blackfin gptimers-example from Documentation tools: move pcmcia crc32hash tool from Documentation tools: move laptops dslm tool from Documentation tools: move accounting tool from Documentation samples: move auxdisplay example code from Documentation samples: move watchdog example code from Documentation samples: move timers example code from Documentation samples: move misc-devices/mei example code from Documentation samples: move mic/mpssd example code from Documentation selftests: Move networking/timestamping from Documentation selftests: move watchdog tests from Documentation/watchdog selftests: move ia64 tests from Documentation/ia64 selftests: move vDSO tests from Documentation/vDSO selftests: move ptp tests from Documentation/ptp selftests: move prctl tests from Documentation/prctl selftests: move dnotify_test from Documentation/filesystems selftests/timers: Add missing error code assignment before test selftests/zram: replace ZRAM_LZ4_COMPRESS ...
Diffstat (limited to 'tools/testing/selftests/watchdog/watchdog-test.c')
-rw-r--r--tools/testing/selftests/watchdog/watchdog-test.c105
1 files changed, 105 insertions, 0 deletions
diff --git a/tools/testing/selftests/watchdog/watchdog-test.c b/tools/testing/selftests/watchdog/watchdog-test.c
new file mode 100644
index 000000000000..6983d05097e2
--- /dev/null
+++ b/tools/testing/selftests/watchdog/watchdog-test.c
@@ -0,0 +1,105 @@
+/*
+ * Watchdog Driver Test Program
+ */
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <sys/ioctl.h>
+#include <linux/types.h>
+#include <linux/watchdog.h>
+
+int fd;
+const char v = 'V';
+
+/*
+ * This function simply sends an IOCTL to the driver, which in turn ticks
+ * the PC Watchdog card to reset its internal timer so it doesn't trigger
+ * a computer reset.
+ */
+static void keep_alive(void)
+{
+ int dummy;
+
+ printf(".");
+ ioctl(fd, WDIOC_KEEPALIVE, &dummy);
+}
+
+/*
+ * The main program. Run the program with "-d" to disable the card,
+ * or "-e" to enable the card.
+ */
+
+static void term(int sig)
+{
+ int ret = write(fd, &v, 1);
+
+ close(fd);
+ if (ret < 0)
+ printf("\nStopping watchdog ticks failed (%d)...\n", errno);
+ else
+ printf("\nStopping watchdog ticks...\n");
+ exit(0);
+}
+
+int main(int argc, char *argv[])
+{
+ int flags;
+ unsigned int ping_rate = 1;
+ int ret;
+
+ setbuf(stdout, NULL);
+
+ fd = open("/dev/watchdog", O_WRONLY);
+
+ if (fd == -1) {
+ printf("Watchdog device not enabled.\n");
+ exit(-1);
+ }
+
+ if (argc > 1) {
+ if (!strncasecmp(argv[1], "-d", 2)) {
+ flags = WDIOS_DISABLECARD;
+ ioctl(fd, WDIOC_SETOPTIONS, &flags);
+ printf("Watchdog card disabled.\n");
+ goto end;
+ } else if (!strncasecmp(argv[1], "-e", 2)) {
+ flags = WDIOS_ENABLECARD;
+ ioctl(fd, WDIOC_SETOPTIONS, &flags);
+ printf("Watchdog card enabled.\n");
+ goto end;
+ } else if (!strncasecmp(argv[1], "-t", 2) && argv[2]) {
+ flags = atoi(argv[2]);
+ ioctl(fd, WDIOC_SETTIMEOUT, &flags);
+ printf("Watchdog timeout set to %u seconds.\n", flags);
+ goto end;
+ } else if (!strncasecmp(argv[1], "-p", 2) && argv[2]) {
+ ping_rate = strtoul(argv[2], NULL, 0);
+ printf("Watchdog ping rate set to %u seconds.\n", ping_rate);
+ } else {
+ printf("-d to disable, -e to enable, -t <n> to set " \
+ "the timeout,\n-p <n> to set the ping rate, and \n");
+ printf("run by itself to tick the card.\n");
+ goto end;
+ }
+ }
+
+ printf("Watchdog Ticking Away!\n");
+
+ signal(SIGINT, term);
+
+ while(1) {
+ keep_alive();
+ sleep(ping_rate);
+ }
+end:
+ ret = write(fd, &v, 1);
+ if (ret < 0)
+ printf("Stopping watchdog ticks failed (%d)...\n", errno);
+ close(fd);
+ return 0;
+}