X-Git-Url: http://git.ozlabs.org/?p=petitboot;a=blobdiff_plain;f=discover%2Fgrub2%2Fbuiltins.c;h=c16b6390225aa403820d65d6dd26841282f51407;hp=2e63fcd09b0733e5fc2ea143f4aab2d79da9328e;hb=86c9d34380b0074dab1ba89a569a94280d6999c4;hpb=9cf9430d5a1db0addd4788798fd7275d2c514f3c

diff --git a/discover/grub2/builtins.c b/discover/grub2/builtins.c
index 2e63fcd..c16b639 100644
--- a/discover/grub2/builtins.c
+++ b/discover/grub2/builtins.c
@@ -5,8 +5,11 @@
 #include <log/log.h>
 #include <types/types.h>
 #include <talloc/talloc.h>
-#include <array-size/array-size.h>
+#include <util/util.h>
+#include <url/url.h>
 
+#include "discover/resource.h"
+#include "discover/parser.h"
 #include "grub2.h"
 
 
@@ -68,6 +71,12 @@ static int builtin_linux(struct grub2_script *script,
 		opt->option->boot_args = talloc_asprintf_append(
 						opt->option->boot_args,
 						" %s", argv[i]);
+
+	char* args_sigfile_default = talloc_asprintf(opt,
+		"%s.cmdline.sig", argv[1]);
+	opt->args_sig_file = create_grub2_resource(opt, script->ctx->device,
+						root, args_sigfile_default);
+	talloc_free(args_sigfile_default);
 	return 0;
 }
 
@@ -123,7 +132,62 @@ static int builtin_search(struct grub2_script *script,
 	return 0;
 }
 
-static bool builtin_test_op(int argc, char **argv, int *consumed)
+/* Note that GRUB does not follow symlinks in evaluating all file
+ * tests but -s, unlike below. However, it seems like a bad idea to
+ * emulate GRUB's behavior (e.g., it would take extra work), so we
+ * implement the behavior that coreutils' test binary has. */
+static bool builtin_test_op_file(struct grub2_script *script, char op,
+		const char *file)
+{
+	bool result;
+	int rc;
+	struct stat statbuf;
+
+	rc = parser_stat_path(script->ctx, script->ctx->device,
+			file, &statbuf);
+	if (rc)
+		return false;
+
+	switch (op) {
+	case 's':
+		/* -s: return true if file exists and has non-zero size */
+		result = statbuf.st_size > 0;
+		break;
+	case 'f':
+		/* -f: return true if file exists and is not a directory. This is
+		 * different than the behavior of "test", but is what GRUB does
+		 * (though note as above that we follow symlinks unlike GRUB). */
+		result = !S_ISDIR(statbuf.st_mode);
+		break;
+	default:
+		result = false;
+
+	}
+
+	return result;
+}
+
+/* See comment at builtin_test_op_file for differences between how
+ * GRUB implements file tests versus Petitboot's GRUB parser. */
+static bool builtin_test_op_dir(struct grub2_script *script, char op,
+		const char *dir)
+{
+	int rc;
+	struct stat statbuf;
+
+	if (op != 'd')
+		return false;
+
+	rc = parser_stat_path(script->ctx, script->ctx->device, dir, &statbuf);
+	if (rc) {
+		return false;
+	}
+
+	return S_ISDIR(statbuf.st_mode);
+}
+
+static bool builtin_test_op(struct grub2_script *script,
+		int argc, char **argv, int *consumed)
 {
 	char *op;
 
@@ -171,18 +235,23 @@ static bool builtin_test_op(int argc, char **argv, int *consumed)
 			return strlen(a1) != 0;
 		}
 
-		/* todo: implement file checks */
 		if (!strcmp(op, "-s") || !strcmp(op, "-f")) {
 			*consumed = 2;
-			return false;
+			return builtin_test_op_file(script, op[1], a1);
+		}
+
+		if (!strcmp(op, "-d")) {
+			*consumed = 2;
+			return builtin_test_op_dir(script, op[1], a1);
 		}
 	}
 
+	op = argv[0];
 	*consumed = 1;
 	return strlen(op) > 0;
 }
 
-static int builtin_test(struct grub2_script *script __attribute__((unused)),
+static int builtin_test(struct grub2_script *script,
 		void *data __attribute__((unused)),
 		int argc, char *argv[])
 {
@@ -221,7 +290,7 @@ static int builtin_test(struct grub2_script *script __attribute__((unused)),
 			continue;
 		}
 
-		rc = builtin_test_op(argc, argv, &consumed);
+		rc = builtin_test_op(script, argc, argv, &consumed);
 		if (not) {
 			rc = !rc;
 			not = false;
@@ -231,6 +300,22 @@ static int builtin_test(struct grub2_script *script __attribute__((unused)),
 	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)),
@@ -239,6 +324,14 @@ static int builtin_nop(struct grub2_script *script __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;
@@ -271,6 +364,22 @@ static struct {
 		.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[] = {