Commit | Line | Data |
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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
d974f67a JK |
2 | #include <stdio.h> |
3 | #include <stdint.h> | |
4 | #include <stdlib.h> | |
5 | #include <unistd.h> | |
6 | #include <sys/types.h> | |
7 | #include <sys/stat.h> | |
8 | #include <fcntl.h> | |
9 | #include <errno.h> | |
10 | #include <string.h> | |
11 | ||
12 | int main(int argc, char **argv) | |
13 | { | |
14 | const char *path; | |
15 | char buf[4]; | |
16 | int fd, rc; | |
17 | ||
18 | if (argc < 2) { | |
19 | fprintf(stderr, "usage: %s <path>\n", argv[0]); | |
20 | return EXIT_FAILURE; | |
21 | } | |
22 | ||
23 | path = argv[1]; | |
24 | ||
25 | /* create a test variable */ | |
26 | fd = open(path, O_RDWR | O_CREAT, 0600); | |
27 | if (fd < 0) { | |
28 | perror("open(O_WRONLY)"); | |
29 | return EXIT_FAILURE; | |
30 | } | |
31 | ||
32 | rc = read(fd, buf, sizeof(buf)); | |
33 | if (rc != 0) { | |
34 | fprintf(stderr, "Reading a new var should return EOF\n"); | |
35 | return EXIT_FAILURE; | |
36 | } | |
37 | ||
38 | return EXIT_SUCCESS; | |
39 | } |