diff options
Diffstat (limited to 'samples/watchdog')
| -rw-r--r-- | samples/watchdog/.gitignore | 2 | ||||
| -rw-r--r-- | samples/watchdog/Makefile | 2 | ||||
| -rw-r--r-- | samples/watchdog/watchdog-simple.c | 25 |
3 files changed, 29 insertions, 0 deletions
diff --git a/samples/watchdog/.gitignore b/samples/watchdog/.gitignore new file mode 100644 index 000000000..a70a0150e --- /dev/null +++ b/samples/watchdog/.gitignore @@ -0,0 +1,2 @@ +# SPDX-License-Identifier: GPL-2.0-only +/watchdog-simple diff --git a/samples/watchdog/Makefile b/samples/watchdog/Makefile new file mode 100644 index 000000000..ab39d23dc --- /dev/null +++ b/samples/watchdog/Makefile @@ -0,0 +1,2 @@ +# SPDX-License-Identifier: GPL-2.0 +userprogs-always-y += watchdog-simple diff --git a/samples/watchdog/watchdog-simple.c b/samples/watchdog/watchdog-simple.c new file mode 100644 index 000000000..9ce66d2ca --- /dev/null +++ b/samples/watchdog/watchdog-simple.c @@ -0,0 +1,25 @@ +// SPDX-License-Identifier: GPL-2.0 +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> +#include <fcntl.h> + +int main(void) +{ + int fd = open("/dev/watchdog", O_WRONLY); + int ret = 0; + if (fd == -1) { + perror("watchdog"); + exit(EXIT_FAILURE); + } + while (1) { + ret = write(fd, "\0", 1); + if (ret != 1) { + ret = -1; + break; + } + sleep(10); + } + close(fd); + return ret; +} |