1 /*
2 * Copyright (c) 2023 Meta
3 *
4 * SPDX-License-Identifier: Apache-2.0
5 */
6
7 #include <pthread.h>
8 #include <stdbool.h>
9 #include <stdio.h>
10 #include <stdlib.h>
11 #include <string.h>
12 #include <unistd.h>
13
14 #include <zephyr/sys/util.h>
15 #include <zephyr/kernel.h>
16 #include <zephyr/version.h>
17
18 #ifdef BUILD_VERSION
19 #define VERSION_BUILD STRINGIFY(BUILD_VERSION)
20 #else
21 #define VERSION_BUILD KERNEL_VERSION_STRING
22 #endif
23
24 #if defined(CONFIG_NEWLIB_LIBC) || defined(CONFIG_PICOLIBC)
25 /* newlib headers seem to be missing this */
26 int getenv_r(const char *name, char *val, size_t len);
27 #endif
28
env(void)29 static void env(void)
30 {
31 extern char **environ;
32
33 if (environ != NULL) {
34 for (char **envp = environ; *envp != NULL; ++envp) {
35 printf("%s\n", *envp);
36 }
37 }
38 }
39
entry(void * arg)40 static void *entry(void *arg)
41 {
42 static char alert_msg_buf[42];
43
44 setenv("BOARD", CONFIG_BOARD, 1);
45 setenv("BUILD_VERSION", VERSION_BUILD, 1);
46 setenv("ALERT", "", 1);
47
48 env();
49
50 while (true) {
51 sleep(1);
52 if (getenv_r("ALERT", alert_msg_buf, sizeof(alert_msg_buf) - 1) < 0 ||
53 strlen(alert_msg_buf) == 0) {
54 continue;
55 }
56 printf("ALERT=%s\n", alert_msg_buf);
57 unsetenv("ALERT");
58 }
59
60 return NULL;
61 }
62
main(void)63 int main(void)
64 {
65 pthread_t th;
66
67 /* create a separate thread so that the shell can start */
68 return pthread_create(&th, NULL, entry, NULL);
69 }
70
