[syslinux:elflink] ldlinux: Fix logic if no DEFAULT or UI directive is found

[syslinux-bot for Matt Fleming]

Commit-ID:  06f042df3c483c442f1150b862ef043711288f5e
Gitweb:     http://www.syslinux.org/commit/06f042df3c483c442f1150b862ef043711288f5e
Author:     Matt Fleming <matt.fleming at intel.com>
AuthorDate: Wed, 31 Oct 2012 12:42:25 +0000
Committer:  Matt Fleming <matt.fleming at intel.com>
CommitDate: Fri, 2 Nov 2012 11:55:41 +0000

ldlinux: Fix logic if no DEFAULT or UI directive is found

Somewhere along the way the code that prints,

    No DEFAULT or UI configuration directive found!

was broken, and now no longer prints at all. While we're fixing this
it's a good opportunity to rework the logic to be clearer. Now we only
print the message if a config file was found, since these directives
are obviously missing if there is no config file (a warning will be
printed about the lack of config file anyway).

Signed-off-by: Matt Fleming <matt.fleming at intel.com>

---
 com32/elflink/ldlinux/config.h  |    2 +-
 com32/elflink/ldlinux/execute.c |    2 +-
 com32/elflink/ldlinux/ldlinux.c |   56 +++++++++++++++++++-------------------
 3 files changed, 30 insertions(+), 30 deletions(-)

diff --git a/com32/elflink/ldlinux/config.h b/com32/elflink/ldlinux/config.h
index ea4736e..63e33b6 100644
--- a/com32/elflink/ldlinux/config.h
+++ b/com32/elflink/ldlinux/config.h
@@ -47,6 +47,6 @@ extern int new_linux_kernel(char *okernel, char *ocmdline);
 
 extern void pm_load_high(com32sys_t *regs);
 
-extern void ldlinux_enter_command(bool prompt);
+extern void ldlinux_enter_command(void);
 
 #endif /* __CONFIG_H__ */
diff --git a/com32/elflink/ldlinux/execute.c b/com32/elflink/ldlinux/execute.c
index e7969c2..6ccde49 100644
--- a/com32/elflink/ldlinux/execute.c
+++ b/com32/elflink/ldlinux/execute.c
@@ -102,7 +102,7 @@ void execute(const char *cmdline, uint32_t type)
 		 * e.g. from vesamenu.c32.
 		 */
 		unload_modules_since("ldlinux.c32");
-		ldlinux_enter_command(!noescape);
+		ldlinux_enter_command();
 	} else if (type == IMAGE_TYPE_CONFIG) {
 		char *argv[] = { "ldlinux.c32", NULL };
 
diff --git a/com32/elflink/ldlinux/ldlinux.c b/com32/elflink/ldlinux/ldlinux.c
index d963595..59c5598 100644
--- a/com32/elflink/ldlinux/ldlinux.c
+++ b/com32/elflink/ldlinux/ldlinux.c
@@ -216,41 +216,36 @@ static void enter_cmdline(void)
 		printf("\n");
 
 		/* return if user only press enter or we timed out */
-		if (!cmdline || cmdline[0] == '\0')
+		if (!cmdline || cmdline[0] == '\0') {
+			if (ontimeoutlen)
+				load_kernel(ontimeout);
 			return;
+		}
 
 		load_kernel(cmdline);
 	}
 }
 
-void ldlinux_enter_command(bool prompt)
+/*
+ * If this function returns you must call ldinux_enter_command() to
+ * preserve the 4.0x behaviour.
+ */
+void ldlinux_auto_boot(void)
 {
-	const char *cmdline = default_cmd;
-
-	if (prompt)
-		goto cmdline;
-auto_boot:
-	/*
-	 * Auto boot
-	 */
-	if (defaultlevel || noescape) {
-		if (defaultlevel) {
-			load_kernel(cmdline); /* Shouldn't return */
-		} else {
+	if (!defaultlevel) {
+		if (strlen(ConfigName))
 			printf("No DEFAULT or UI configuration directive found!\n");
+		if (noescape)
+			kaboom();
+	} else
+		load_kernel(default_cmd);
+}
 
-			if (noescape)
-				kaboom();
-		}
-	}
-
-cmdline:
-	/* Only returns if the user pressed enter or input timed out */
+void ldlinux_enter_command(void)
+{
+	if (noescape)
+		ldlinux_auto_boot();
 	enter_cmdline();
-
-	cmdline = ontimeoutlen ? ontimeout : default_cmd;
-
-	goto auto_boot;
 }
 
 /*
@@ -291,7 +286,7 @@ int main(int argc __unused, char **argv __unused)
 		cmdline = dst = malloc(count + 1);
 		if (!dst) {
 			printf("Failed to allocate memory for ADV\n");
-			ldlinux_enter_command(true);
+			ldlinux_enter_command();
 		}
 
 		for (i = 0; i < count; i++)
@@ -303,11 +298,16 @@ int main(int argc __unused, char **argv __unused)
 			syslinux_adv_write();
 
 		load_kernel(cmdline); /* Shouldn't return */
-		ldlinux_enter_command(true);
+		ldlinux_enter_command();
 	}
 
 	/* TODO: Check KbdFlags? */
+	if (!forceprompt)
+		ldlinux_auto_boot();
+
+	if (defaultlevel > 1)
+		ldlinux_auto_boot();
 
-	ldlinux_enter_command(forceprompt);
+	ldlinux_enter_command();
 	return 0;
 }