1 /* 1 /*
2 * Copyright (c) 2024 Alexey Dobriyan <adobriy 2 * Copyright (c) 2024 Alexey Dobriyan <adobriyan@gmail.com>
3 * 3 *
4 * Permission to use, copy, modify, and distri 4 * Permission to use, copy, modify, and distribute this software for any
5 * purpose with or without fee is hereby grant 5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice 6 * copyright notice and this permission notice appear in all copies.
7 * 7 *
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AU 8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL 9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SH 10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUEN 11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA 12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TOR 13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANC 14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15 */ 15 */
16 /* Test that userspace program is not kernel t 16 /* Test that userspace program is not kernel thread. */
17 #undef NDEBUG 17 #undef NDEBUG
18 #include <assert.h> 18 #include <assert.h>
19 #include <fcntl.h> 19 #include <fcntl.h>
20 #include <string.h> 20 #include <string.h>
21 #include <unistd.h> 21 #include <unistd.h>
22 22
23 int main(void) 23 int main(void)
24 { 24 {
25 int fd = open("/proc/self/status", O_R 25 int fd = open("/proc/self/status", O_RDONLY);
26 assert(fd >= 0); 26 assert(fd >= 0);
27 27
28 char buf[4096]; 28 char buf[4096];
29 ssize_t rv = read(fd, buf, sizeof(buf) 29 ssize_t rv = read(fd, buf, sizeof(buf));
30 assert(0 <= rv && rv < sizeof(buf)); 30 assert(0 <= rv && rv < sizeof(buf));
31 buf[rv] = '\0'; 31 buf[rv] = '\0';
32 32
33 /* This test is very much not kernel t 33 /* This test is very much not kernel thread. */
34 assert(strstr(buf, "Kthread:\t\n")); 34 assert(strstr(buf, "Kthread:\t\n"));
35 35
36 return 0; 36 return 0;
37 } 37 }
38 38
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