From: hpa <hpa>
Date: Tue, 4 Jan 2005 03:04:53 +0000 (+0000)
Subject: Use libfat to set the MS-DOS attributes when using the unix installer.
X-Git-Tag: syslinux-3.11~163
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=6c00ab2e9e714d5963f3dcf85c7dd100e02a08d1;p=profile%2Fivi%2Fsyslinux.git

Use libfat to set the MS-DOS attributes when using the unix installer.
---

diff --git a/libfat/libfat.h b/libfat/libfat.h
index 58bf6b5..8c6a9d2 100644
--- a/libfat/libfat.h
+++ b/libfat/libfat.h
@@ -30,6 +30,12 @@
 typedef uint32_t libfat_sector_t;
 struct libfat_filesystem;
 
+struct libfat_direntry {
+  libfat_sector_t sector;
+  int offset;
+  unsigned char entry[32];
+};
+
 /*
  * Open the filesystem.  The readfunc is the function to read
  * sectors, in the format:
@@ -75,7 +81,7 @@ void * libfat_get_sector(struct libfat_filesystem *fs, libfat_sector_t n);
  * Copies the directory entry into direntry and returns 0 if found.
  */
 int32_t libfat_searchdir(struct libfat_filesystem *fs, int32_t dirclust,
-			 const void *name, void *direntry);
+			 const void *name, struct libfat_direntry *direntry);
 
 #endif /* LIBFAT_H */
 
diff --git a/libfat/searchdir.c b/libfat/searchdir.c
index 7c07165..8b65268 100644
--- a/libfat/searchdir.c
+++ b/libfat/searchdir.c
@@ -23,7 +23,7 @@
 #include "libfatint.h"
 
 int32_t libfat_searchdir(struct libfat_filesystem *fs, int32_t dirclust,
-			 const void *name, void *direntry)
+			 const void *name, struct libfat_direntry *direntry)
 {
   struct fat_dirent *dep;
   int nent;
@@ -39,11 +39,14 @@ int32_t libfat_searchdir(struct libfat_filesystem *fs, int32_t dirclust,
     if ( !dep )
       return -1;		/* Read error */
 
-    for ( nent = LIBFAT_SECTOR_SIZE/sizeof(struct fat_dirent) ;
-	  nent ; nent-- ) {
+    for ( nent = 0 ; nent < LIBFAT_SECTOR_SIZE ;
+	  nent += sizeof(struct fat_dirent) ) {
       if ( !memcmp(dep->name, name, 11) ) {
-	if ( direntry )
-	  memcpy(direntry, dep, sizeof (*dep));
+	if ( direntry ) {
+	  memcpy(direntry->entry, dep, sizeof (*dep));
+	  direntry->sector = s;
+	  direntry->offset = nent;
+	}
 	if ( read32(&dep->size) == 0 )
 	  return 0;		/* An empty file has no clusters */
 	else
diff --git a/unix/syslinux.c b/unix/syslinux.c
index c0cf346..276990d 100644
--- a/unix/syslinux.c
+++ b/unix/syslinux.c
@@ -1,7 +1,7 @@
 #ident "$Id$"
 /* ----------------------------------------------------------------------- *
  *   
- *   Copyright 1998-2004 H. Peter Anvin - All Rights Reserved
+ *   Copyright 1998-2005 H. Peter Anvin - All Rights Reserved
  *
  *   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
@@ -20,10 +20,14 @@
  * mtools, but requires root privilege.
  */
 
+/*
+ * If DO_DIRECT_MOUNT is 0, call mount(8)
+ * If DO_DIRECT_MOUNT is 1, call mount(2)
+ */
 #ifdef __KLIBC__
-# define DO_DIRECT_MOUNT 1	/* Call mount(2) directly */
+# define DO_DIRECT_MOUNT 1
 #else
-# define DO_DIRECT_MOUNT 0	/* Call /bin/mount instead */
+# define DO_DIRECT_MOUNT 0	/* glibc has broken losetup ioctls */
 #endif
 
 #define _GNU_SOURCE
@@ -100,11 +104,12 @@ void __attribute__((noreturn)) die(const char *msg)
  */
 ssize_t xpread(int fd, void *buf, size_t count, off_t offset)
 {
+  char *p = buf;
   ssize_t rv;
   ssize_t done = 0;
 
   while ( count ) {
-    rv = pread(fd, buf, count, offset);
+    rv = pread(fd, p, count, offset);
     if ( rv == 0 ) {
       die("short read");
     } else if ( rv == -1 ) {
@@ -117,6 +122,7 @@ ssize_t xpread(int fd, void *buf, size_t count, off_t offset)
     } else {
       offset += rv;
       done += rv;
+      p += rv;
       count -= rv;
     }
   }
@@ -124,13 +130,14 @@ ssize_t xpread(int fd, void *buf, size_t count, off_t offset)
   return done;
 }
 
-ssize_t xpwrite(int fd, void *buf, size_t count, off_t offset)
+ssize_t xpwrite(int fd, const void *buf, size_t count, off_t offset)
 {
+  const char *p = buf;
   ssize_t rv;
   ssize_t done = 0;
 
   while ( count ) {
-    rv = pwrite(fd, buf, count, offset);
+    rv = pwrite(fd, p, count, offset);
     if ( rv == 0 ) {
       die("short write");
     } else if ( rv == -1 ) {
@@ -143,6 +150,7 @@ ssize_t xpwrite(int fd, void *buf, size_t count, off_t offset)
     } else {
       offset += rv;
       done += rv;
+      p += rv;
       count -= rv;
     }
   }
@@ -174,6 +182,7 @@ int main(int argc, char *argv[])
   char *ldlinux_name, **argp, *opt;
   int force = 0;		/* -f (force) option */
   struct libfat_filesystem *fs;
+  struct libfat_direntry dentry;
   libfat_sector_t s, *secp, sectors[65]; /* 65 is maximum possible */
   int32_t ldlinux_cluster;
   int nsectors;
@@ -445,7 +454,7 @@ umount:
    * of the installer.
    */
   fs = libfat_open(libfat_xpread, dev_fd);
-  ldlinux_cluster = libfat_searchdir(fs, 0, "LDLINUX SYS", NULL);
+  ldlinux_cluster = libfat_searchdir(fs, 0, "LDLINUX SYS", &dentry);
   secp = sectors;
   nsectors = 0;
   s = libfat_clustertosector(fs, ldlinux_cluster);
@@ -467,6 +476,15 @@ umount:
   xpwrite(dev_fd, syslinux_ldlinux, 512, filesystem_offset + ((off_t)sectors[0] << 9));
 
   /*
+   * Patch the root directory to set attributes to
+   * HIDDEN|SYSTEM|READONLY
+   */
+  {
+    const unsigned char attrib = 0x07;
+    xpwrite(dev_fd, &attrib, 1, ((off_t)dentry.sector << 9)+dentry.offset+11);
+  }
+
+  /*
    * To finish up, write the boot sector
    */