From 16ee25b91ac9b07d4a55441367a0ac19785ea915 Mon Sep 17 00:00:00 2001
From: Florian Fainelli <florian@openwrt.org>
Date: Fri, 11 May 2007 22:19:22 +0000
Subject: Add patch-cmdline to patch the RB1xx kernel command line after
installation
SVN-Revision: 7193
---
package/patch-cmdline/src/patch-cmdline.c | 80 +++++++++++++++++++++++++++++++
1 file changed, 80 insertions(+)
create mode 100644 package/patch-cmdline/src/patch-cmdline.c
(limited to 'package/patch-cmdline/src/patch-cmdline.c')
diff --git a/package/patch-cmdline/src/patch-cmdline.c b/package/patch-cmdline/src/patch-cmdline.c
new file mode 100644
index 0000000..d4636f7
--- /dev/null
+++ b/package/patch-cmdline/src/patch-cmdline.c
@@ -0,0 +1,80 @@
+/*
+ * patch-cmdline.c - patch the kernel command line on rb532
+ *
+ * Copyright (C) 2006 Felix Fietkau <nbd@openwrt.org>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ * $Id:$
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stddef.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <string.h>
+
+#define SEARCH_SPACE (16 * 1024)
+#define CMDLINE_MAX 512
+
+int main(int argc, char **argv)
+{
+ int fd, found = 0, len, ret = -1;
+ char *ptr, *p;
+
+ if (argc != 3) {
+ fprintf(stderr, "Usage: %s <file> <cmdline>\n", argv[0]);
+ goto err1;
+ }
+ len = strlen(argv[2]);
+ if (len + 9 > CMDLINE_MAX) {
+ fprintf(stderr, "Command line string too long\n");
+ goto err1;
+ }
+
+ if (((fd = open(argv[1], O_RDWR)) < 0) ||
+ (ptr = (char *) mmap(0, SEARCH_SPACE + CMDLINE_MAX, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0)) == (void *) (-1)) {
+ fprintf(stderr, "Could not open kernel image");
+ goto err2;
+ }
+
+ for (p = ptr; p < (ptr + SEARCH_SPACE); p += 4) {
+ if (memcmp(p, "CMDLINE:", 8) == 0) {
+ found = 1;
+ p += 8;
+ break;
+ }
+ }
+ if (!found) {
+ fprintf(stderr, "Command line marker not found!\n");
+ goto err3;
+ }
+
+ memset(p, 0, CMDLINE_MAX - 8);
+ strcpy(p, argv[2]);
+ msync(p, CMDLINE_MAX, MS_SYNC|MS_INVALIDATE);
+ ret = 0;
+
+err3:
+ munmap((void *) ptr, len);
+err2:
+ if (fd > 0)
+ close(fd);
+err1:
+ return ret;
+}
--
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