// SPDX-License-Identifier: GPL-2.0 #include <linux/kmsg_dump.h> #include <linux/console.h> #include <linux/string.h> #include <shared/init.h> #include <shared/kern.h> #include <os.h> static void kmsg_dumper_stdout(struct kmsg_dumper *dumper, enum kmsg_dump_reason reason) { static char line[1024]; struct console *con; size_t len = 0; /* only dump kmsg when no console is available */ if (!console_trylock()) return; for_each_console(con) { if(strcmp(con->name, "tty") == 0 && (con->flags & (CON_ENABLED | CON_CONSDEV)) != 0) { break; } } console_unlock(); if (con) return; printf("kmsg_dump:\n"); while (kmsg_dump_get_line(dumper, true, line, sizeof(line), &len)) { line[len] = '\0'; printf("%s", line); } } static struct kmsg_dumper kmsg_dumper = { .dump = kmsg_dumper_stdout }; int __init kmsg_dumper_stdout_init(void) { return kmsg_dump_register(&kmsg_dumper); } __uml_postsetup(kmsg_dumper_stdout_init);