stuff

servers/initd/main.c

@@ -0,0 +1,68 @@
+#include <zinnia/channel.h>
+#include <zinnia/handle.h>
+#include <zinnia/ipc/init.h>
+#include <zinnia/mem.h>
+#include <zinnia/status.h>
+#include <zinnia/system.h>
+#include <common/compiler.h>
+#include <common/utils.h>
+#include <stdarg.h>
+#include <stdatomic.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/auxv.h>
+
+#define ZN_ASSERT(expr) \
+    do { \
+        zn_status_t status = expr; \
+        if (status != ZN_OK) { \
+            zn_printf("initd: " #expr " failed: %s\n", zn_status_to_string(status)); \
+            return EXIT_FAILURE; \
+        } \
+    } while (0)
+
+[[__format(printf, 1, 2)]]
+static void zn_printf(const char* msg, ...) {
+    char buf[1024];
+
+    va_list args;
+    va_start(args, msg);
+    int32_t len = vsnprintf(buf, sizeof(buf), msg, args);
+    va_end(args);
+
+    zn_log(buf, len);
+}
+
+int main(int argc, char* argv[], char* envp[]) {
+    zn_printf("initd: starting...\n");
+    zn_handle_t channel = getauxval(AT_INIT_HANDLE);
+
+    while (true) {
+        static thread_local zn_handle_t handles[32];
+        static thread_local char buf[1024];
+
+        ZN_ASSERT(zn_channel_read(channel, handles, buf, ARRAY_SIZE(handles), ARRAY_SIZE(buf), nullptr, nullptr));
+
+        enum ipc_msg_id* msg = (enum ipc_msg_id*)buf;
+        switch (*msg) {
+        case IPC_MSG_FOO: {
+            struct ipc_init_register_rq* foo = (struct ipc_init_register_rq*)msg;
+
+            char buf[32] = {0};
+            IPC_GET_STRING(foo->data, &foo->name, buf);
+
+            zn_printf("initd: ipc_init_register_rq, peer = \"%s\"\n", buf);
+        } break;
+        case IPC_MSG_BAR: {
+            struct ipc_kernel_msg* foo = (struct ipc_kernel_msg*)msg;
+
+            char buf[32] = {0};
+            IPC_GET_STRING(foo->data, &foo->name, buf);
+            zn_printf("initd: ipc_kernel_msg, msg = \"%s\"\n", buf);
+        } break;
+        case IPC_MSG_BAZ:
+            break;
+        }
+    }
+}

servers/initd/meson.build

@@ -0,0 +1,8 @@
+executable(
+    'initd',
+    'main.c',
+    # The init process is linked statically because the dynamic loader can't be read before posixd is up.
+    link_args: '-static',
+    include_directories: common_includes,
+    install: true,
+)