+static void boot_hook_update_param(void *ctx, struct boot_task *task,
+ const char *name, const char *value)
+{
+ struct p {
+ const char *name;
+ char **p;
+ } *param, params[] = {
+ { "boot_image", &task->local_image },
+ { "boot_initrd", &task->local_initrd },
+ { "boot_dtb", &task->local_dtb },
+ { "boot_args", &task->args },
+ { NULL, NULL },
+ };
+
+ for (param = params; param->name; param++) {
+ if (strcmp(param->name, name))
+ continue;
+
+ *param->p = talloc_strdup(ctx, value);
+ return;
+ }
+}
+
+static void boot_hook_update(void *ctx, const char *hookname,
+ struct boot_task *task, char *buf)
+{
+ char *line, *name, *val, *sep;
+ char *saveptr;
+
+ for (;; buf = NULL) {
+
+ line = strtok_r(buf, "\n", &saveptr);
+ if (!line)
+ break;
+
+ sep = strchr(line, '=');
+ if (!sep)
+ continue;
+
+ *sep = '\0';
+ name = line;
+ val = sep + 1;
+
+ boot_hook_update_param(ctx, task, name, val);
+
+ pb_log("boot hook %s specified %s=%s\n",
+ hookname, name, val);
+ }
+}
+
+static void boot_hook_setenv(struct boot_task *task)
+{
+ unsetenv("boot_image");
+ unsetenv("boot_initrd");
+ unsetenv("boot_dtb");
+ unsetenv("boot_args");
+
+ setenv("boot_image", task->local_image, 1);
+ if (task->local_initrd)
+ setenv("boot_initrd", task->local_initrd, 1);
+ if (task->local_dtb)
+ setenv("boot_dtb", task->local_dtb, 1);
+ if (task->args)
+ setenv("boot_args", task->args, 1);
+}
+
+static int hook_filter(const struct dirent *dirent)
+{
+ return dirent->d_type == DT_REG || dirent->d_type == DT_LNK;
+}
+
+static int hook_cmp(const struct dirent **a, const struct dirent **b)
+{
+ return strcmp((*a)->d_name, (*b)->d_name);
+}
+
+static void run_boot_hooks(void *ctx, struct boot_task *task,
+ boot_status_fn status_fn, void *status_arg)
+{
+ struct dirent **hooks;
+ int i, n;
+
+ n = scandir(boot_hook_dir, &hooks, hook_filter, hook_cmp);
+ if (n < 1)
+ return;
+
+ update_status(status_fn, status_arg, BOOT_STATUS_INFO,
+ "running boot hooks");
+
+ boot_hook_setenv(task);
+
+ for (i = 0; i < n; i++) {
+ const char *argv[2] = { NULL, NULL };
+ char *path, *buf;
+ int buf_len, rc;
+
+ path = join_paths(ctx, boot_hook_dir, hooks[i]->d_name);
+
+ if (access(path, X_OK))
+ continue;
+
+ pb_log("running boot hook %s\n", hooks[i]->d_name);
+
+ argv[0] = path;
+ rc = pb_run_cmd_pipe(argv, 1, task->dry_run, ctx,
+ &buf, &buf_len);
+
+ /* if the hook returned with BOOT_HOOK_EXIT_UPDATE,
+ * then we process stdout to look for updated params
+ */
+ if (rc == BOOT_HOOK_EXIT_UPDATE) {
+ boot_hook_update(ctx, hooks[i]->d_name, task, buf);
+ boot_hook_setenv(task);
+ }
+
+ talloc_free(buf);
+ talloc_free(path);
+ }
+
+ free(hooks);
+}
+
projects / petitboot / blobdiff