#include <stdio.h>
#include <string.h>
+#include <log/log.h>
+#include <types/types.h>
#include <talloc/talloc.h>
-#include <array-size/array-size.h>
+#include <util/util.h>
+#include "discover/parser.h"
#include "grub2.h"
return 0;
}
+static int builtin_linux(struct grub2_script *script,
+ void *data __attribute__((unused)),
+ int argc, char *argv[])
+{
+ struct discover_boot_option *opt = script->opt;
+ const char *root;
+ int i;
+
+ if (!opt) {
+ pb_log("grub2 syntax error: 'linux' statement outside "
+ "a menuentry.\n");
+ return -1;
+ }
+
+ if (argc < 2) {
+ pb_log("grub2 syntax error: no filename provided to "
+ "linux statement\n");
+ return -1;
+ }
+
+ root = script_env_get(script, "root");
+
+ opt->boot_image = create_grub2_resource(opt, script->ctx->device,
+ root, argv[1]);
+ opt->option->boot_args = NULL;
+
+ if (argc > 2)
+ opt->option->boot_args = talloc_strdup(opt, argv[2]);
+
+ for (i = 3; i < argc; i++)
+ opt->option->boot_args = talloc_asprintf_append(
+ opt->option->boot_args,
+ " %s", argv[i]);
+ return 0;
+}
+
+static int builtin_initrd(struct grub2_script *script,
+ void *data __attribute__((unused)),
+ int argc, char *argv[])
+{
+ struct discover_boot_option *opt = script->opt;
+ const char *root;
+
+ if (!opt) {
+ pb_log("grub2 syntax error: 'initrd' statement outside "
+ "a menuentry.\n");
+ return -1;
+ }
+
+ if (argc < 2) {
+ pb_log("grub2 syntax error: no filename provided to "
+ "initrd statement\n");
+ return -1;
+ }
+
+ root = script_env_get(script, "root");
+ opt->initrd = create_grub2_resource(opt, script->ctx->device,
+ root, argv[1]);
+
+ return 0;
+}
+
+static int builtin_search(struct grub2_script *script,
+ void *data __attribute__((unused)),
+ int argc, char *argv[])
+{
+ const char *env_var, *spec;
+ int i;
+
+ env_var = NULL;
+
+ for (i = 1; i < argc - 1; i++) {
+ if (!strncmp(argv[i], "--set=", strlen("--set="))) {
+ env_var = argv[i] + strlen("--set=");
+ break;
+ }
+ }
+
+ if (!env_var)
+ return 0;
+
+ spec = argv[argc - 1];
+
+ script_env_set(script, env_var, spec);
+
+ return 0;
+}
+
+static bool builtin_test_op_file(struct grub2_script *script, char op,
+ const char *file)
+{
+ bool result;
+ int len, rc;
+ char *buf;
+
+ rc = parser_request_file(script->ctx, script->ctx->device,
+ file, &buf, &len);
+ if (rc)
+ return false;
+
+ switch (op) {
+ case 's':
+ /* -s: return true if file exists and has non-zero size */
+ result = len > 0;
+ break;
+ case 'f':
+ /* -f: return true if file exists */
+ result = true;
+ break;
+ default:
+ result = false;
+
+ }
+
+ talloc_free(buf);
+ return result;
+}
+
+static bool builtin_test_op(struct grub2_script *script,
+ int argc, char **argv, int *consumed)
+{
+ char *op;
+
+ if (argc >= 3) {
+ const char *a1, *a2;
+
+ a1 = argv[0];
+ op = argv[1];
+ a2 = argv[2];
+
+ if (!strcmp(op, "=") || !strcmp(op, "==")) {
+ *consumed = 3;
+ return !strcmp(a1, a2);
+ }
+
+ if (!strcmp(op, "!=")) {
+ *consumed = 3;
+ return strcmp(a1, a2);
+ }
+
+ if (!strcmp(op, "<")) {
+ *consumed = 3;
+ return strcmp(a1, a2) < 0;
+ }
+
+ if (!strcmp(op, ">")) {
+ *consumed = 3;
+ return strcmp(a1, a2) > 0;
+ }
+ }
+
+ if (argc >= 2) {
+ const char *a1;
+
+ op = argv[0];
+ a1 = argv[1];
+
+ if (!strcmp(op, "-z")) {
+ *consumed = 2;
+ return strlen(a1) == 0;
+ }
+
+ if (!strcmp(op, "-n")) {
+ *consumed = 2;
+ return strlen(a1) != 0;
+ }
+
+ if (!strcmp(op, "-s") || !strcmp(op, "-f")) {
+ *consumed = 2;
+ return builtin_test_op_file(script, op[1], a1);
+ }
+ }
+
+ op = argv[0];
+ *consumed = 1;
+ return strlen(op) > 0;
+}
+
+static int builtin_test(struct grub2_script *script,
+ void *data __attribute__((unused)),
+ int argc, char *argv[])
+{
+ int consumed;
+ bool not, rc;
+
+ if (!strcmp(argv[0], "[") && !strcmp(argv[argc - 1], "]"))
+ argc--;
+
+ /* skip command name */
+ argc--;
+ argv++;
+
+ not = false;
+ rc = false;
+
+ for (consumed = 0; argc > 0; argv += consumed, argc -= consumed) {
+
+ if (!strcmp(argv[0], "!")) {
+ not = true;
+ consumed = 1;
+ continue;
+ }
+
+ if (!strcmp(argv[0], "-a")) {
+ if (!rc)
+ return 1;
+ consumed = 1;
+ continue;
+ }
+
+ if (!strcmp(argv[0], "-o")) {
+ if (rc)
+ return 0;
+ consumed = 1;
+ continue;
+ }
+
+ rc = builtin_test_op(script, argc, argv, &consumed);
+ if (not) {
+ rc = !rc;
+ not = false;
+ }
+ }
+
+ return rc ? 0 : 1;
+}
+
+static int builtin_true(struct grub2_script *script __attribute__((unused)),
+ void *data __attribute__((unused)),
+ int argc __attribute__((unused)),
+ char *argv[] __attribute__((unused)))
+{
+ return 0;
+}
+
+static int builtin_false(struct grub2_script *script __attribute__((unused)),
+ void *data __attribute__((unused)),
+ int argc __attribute__((unused)),
+ char *argv[] __attribute__((unused)))
+{
+ return 1;
+}
+
+static int builtin_nop(struct grub2_script *script __attribute__((unused)),
+ void *data __attribute__((unused)),
+ int argc __attribute__((unused)),
+ char *argv[] __attribute__((unused)))
+{
+ return 0;
+}
+
+extern int builtin_load_env(struct grub2_script *script,
+ void *data __attribute__((unused)),
+ int argc, char *argv[]);
+int builtin_save_env(struct grub2_script *script,
+ void *data __attribute__((unused)),
+ int argc, char *argv[]);
+
+
static struct {
const char *name;
grub2_function fn;
} builtins[] = {
{
.name = "set",
- .fn = builtin_set
+ .fn = builtin_set,
+ },
+ {
+ .name = "linux",
+ .fn = builtin_linux,
+ },
+ {
+ .name = "linux16",
+ .fn = builtin_linux,
+ },
+ {
+ .name = "initrd",
+ .fn = builtin_initrd,
+ },
+ {
+ .name = "search",
+ .fn = builtin_search,
+ },
+ {
+ .name = "[",
+ .fn = builtin_test,
+ },
+ {
+ .name = "test",
+ .fn = builtin_test,
+ },
+ {
+ .name = "true",
+ .fn = builtin_true,
+ },
+ {
+ .name = "false",
+ .fn = builtin_false,
+ },
+ {
+ .name = "load_env",
+ .fn = builtin_load_env,
+ },
+ {
+ .name = "save_env",
+ .fn = builtin_save_env,
},
};
+static const char *nops[] = {
+ "echo", "export", "insmod", "loadfont", "terminfo",
+};
+
void register_builtins(struct grub2_script *script)
{
unsigned int i;
for (i = 0; i < ARRAY_SIZE(builtins); i++)
script_register_function(script, builtins[i].name,
builtins[i].fn, NULL);
+
+ for (i = 0; i < ARRAY_SIZE(nops); i++)
+ script_register_function(script, nops[i], builtin_nop, NULL);
}
projects / petitboot / blobdiff