Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) #include <stdio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3) #include <stdint.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4) #include <stdlib.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) #include <unistd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) #include <sys/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) #include <sys/stat.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) #include <fcntl.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) #include <errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) int main(int argc, char **argv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) 	const char *path;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) 	char buf[4];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 	int fd, rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 	if (argc < 2) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 		fprintf(stderr, "usage: %s <path>\n", argv[0]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 		return EXIT_FAILURE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 	path = argv[1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 	/* create a test variable */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 	fd = open(path, O_RDWR | O_CREAT, 0600);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 	if (fd < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 		perror("open(O_WRONLY)");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 		return EXIT_FAILURE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 	rc = read(fd, buf, sizeof(buf));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 	if (rc != 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 		fprintf(stderr, "Reading a new var should return EOF\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 		return EXIT_FAILURE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 	return EXIT_SUCCESS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) }