new function grub_seek, fix a bug in the doc.

ChangeLog

@@ -1,3 +1,15 @@
+1999-12-30  OKUJI Yoshinori  <okuji@gnu.org>
+
+	* stage2/disk_io.c (grub_seek): New function.
+	* stage2/shared.h (grub_seek): Declared.
+	* stage2/boot.c (load_image): Use grub_seek instead of setting
+	FILEPOS to a new value directly.
+	* stage2/builtins.c (install_func): Likewise.
+	(testload_func): Likewise.
+
+	* docs/grub.texi: Use a single direntry command for all the
+	entries instead of one per entry.
+	
 1999-12-29  OKUJI Yoshinori  <okuji@gnu.org>
 
 	* grub/asmstub.c (check_device) [__linux__]: Check if DEVICE is

docs/grub.texi

@@ -17,15 +17,7 @@
 @dircategory Kernel
 @direntry
 * GRUB: (grub).                 The GRand Unified Bootloader
-@end direntry
-
-@dircategory Kernel
-@direntry
 * grub-install: (grub)Invoking grub-install.    Install GRUB on your drive
-@end direntry
-
-@dircategory Kernel
-@direntry
 * mbchk: (grub)Invoking mbchk.  Check for the format of a Multiboot kernel
 @end direntry
 

stage2/boot.c

@@ -123,7 +123,7 @@ load_image (char *kernel, char *arg)
       entry_addr = (entry_func) pu.mb->entry_addr;
       cur_addr = pu.mb->load_addr;
       /* first offset into file */
-      filepos = i - (pu.mb->header_addr - cur_addr);
+      grub_seek (i - (pu.mb->header_addr - cur_addr));
       text_len = pu.mb->load_end_addr - cur_addr;
       data_len = 0;
       bss_len = pu.mb->bss_end_addr - pu.mb->load_end_addr;
@@ -177,7 +177,7 @@ load_image (char *kernel, char *arg)
 	}
 
       /* first offset into file */
-      filepos = N_TXTOFF ((*(pu.aout)));
+      grub_seek (N_TXTOFF (*(pu.aout)));
       text_len = pu.aout->a_text;
       data_len = pu.aout->a_data;
       bss_len = pu.aout->a_bss;
@@ -280,7 +280,7 @@ load_image (char *kernel, char *arg)
 	  }
 
 	  /* offset into file */
-	  filepos = data_len + SECTOR_SIZE;
+	  grub_seek (data_len + SECTOR_SIZE);
 
 	  cur_addr = LINUX_STAGING_AREA + text_len;
 	  if (grub_read ((char *) LINUX_STAGING_AREA, text_len)
@@ -433,7 +433,7 @@ load_image (char *kernel, char *arg)
 	  if (phdr->p_type == PT_LOAD)
 	    {
 	      /* offset into file */
-	      filepos = phdr->p_offset;
+	      grub_seek (phdr->p_offset);
 	      filesiz = phdr->p_filesz;
 	      
 	      if (type == KERNEL_TYPE_FREEBSD)

stage2/builtins.c

@@ -1325,7 +1325,8 @@ install_func (char *arg, int flags)
   installaddr += SECTOR_SIZE;
   
   /* Read the whole of Stage2 except for the first sector.  */
-  filepos = SECTOR_SIZE;
+  grub_seek (SECTOR_SIZE);
+
   disk_read_hook = disk_read_blocklist_func;
   if (! grub_read (dummy, -1))
     goto fail;
@@ -1408,7 +1409,7 @@ install_func (char *arg, int flags)
 		goto fail;
 
 	      /* Skip the first sector.  */
-	      filepos = SECTOR_SIZE;
+	      grub_seek (SECTOR_SIZE);
 	      
 	      disk_read_hook = disk_read_savesect_func;
 	      if (grub_read ((char *) SCRATCHADDR, SECTOR_SIZE) != SECTOR_SIZE)
@@ -2341,7 +2342,7 @@ setup_func (char *arg, int flags)
 			int len;
 
 			/* Need to know the size of the Stage 1.5.  */
-			filepos = 0;
+			grub_seek (0);
 			len = grub_read (buffer, -1);
 			/* Construct the blocklist representation.  */
 			grub_sprintf (stage2, "%s1+%d",
@@ -2440,7 +2441,7 @@ testload_func (char *arg, int flags)
   /* First partial read.  */
   grub_printf ("\nPartial read 1: ");
 
-  filepos = 0;
+  grub_seek (0);
   grub_read ((char *) RAW_ADDR (0x200000), 0x7);
   grub_read ((char *) RAW_ADDR (0x200007), 0x100);
   grub_read ((char *) RAW_ADDR (0x200107), 0x10);
@@ -2451,7 +2452,7 @@ testload_func (char *arg, int flags)
   /* Second partial read.  */
   grub_printf ("\nPartial read 2: ");
 
-  filepos = 0;
+  grub_seek (0);
   grub_read ((char *) RAW_ADDR (0x300000), 0x10000);
   grub_read ((char *) RAW_ADDR (0x310000), 0x10);
   grub_read ((char *) RAW_ADDR (0x310010), 0x7);

stage2/disk_io.c

@@ -1419,8 +1419,18 @@ grub_read (char *buf, int len)
   return (*(fsys_table[fsys_type].read_func)) (buf, len);
 }
 
-
 #ifndef STAGE1_5
+/* Reposition a file offset.  */
+int
+grub_seek (int offset)
+{
+  if (offset > filemax || offset < 0)
+    return -1;
+
+  filepos = offset;
+  return offset;
+}
+
 int
 dir (char *dirname)
 {

stage2/shared.h

@@ -659,7 +659,8 @@ typedef enum
   KERNEL_TYPE_FREEBSD,		/* FreeBSD.  */
   KERNEL_TYPE_NETBSD,		/* NetBSD.  */
   KERNEL_TYPE_CHAINLOADER	/* Chainloader.  */
-} kernel_t;
+}
+kernel_t;
 
 extern kernel_t kernel_type;
 extern int grub_timeout;
@@ -726,9 +727,12 @@ int set_partition_hidden_flag (int hidden);
 int grub_open (char *filename);
 
 /* Read LEN bytes into BUF from the file that was opened with
-   GRUB_OPEN.  If LEN is -1, read all the remaining data in the file */
+   GRUB_OPEN.  If LEN is -1, read all the remaining data in the file.  */
 int grub_read (char *buf, int len);
 
+/* Reposition a file offset.  */
+int grub_seek (int offset);
+
 /* Close a file.  */
 void grub_close (void);