com32/gpllib/disk/bootloaders.c

   1 /* ----------------------------------------------------------------------- *
   2  *
   3  *   Copyright 2009 Pierre-Alexandre Meyer
   4  *
   5  *   This file is part of Syslinux, and is made available under
   6  *   the terms of the GNU General Public License version 2.
   7  *
   8  * ----------------------------------------------------------------------- */
   9
  10 #include <disk/bootloaders.h>
  11 #include <disk/common.h>
  12 #include <disk/geom.h>
  13 #include <disk/read.h>
  14 #include <stdlib.h>
  15 #include <string.h>
  16
  17 /**
  18  * get_bootloader_string - return a string describing the boot code in a
  19  *                         bootsector
  20  * @d:                  driveinfo struct describing the drive
  21  * @p:  partition to scan (usually the active one)
  22  * @buffer:             pre-allocated buffer
  23  * @buffer_size:        @buffer size
  24  **/
  25 int get_bootloader_string(struct driveinfo *d, const struct part_entry *p,
  26                           char *buffer, const int buffer_size)
  27 {
  28     char boot_sector[SECTOR * sizeof(char)];
  29
  30     if (read_sectors(d, &boot_sector, p->start_lba, 1) == -1)
  31         return -1;
  32     else {
  33         if (!strncmp(boot_sector + 3, "SYSLINUX", 8))
  34             strncpy(buffer, "SYSLINUX", buffer_size - 1);
  35         else if (!strncmp(boot_sector + 3, "EXTLINUX", 8))
  36             strncpy(buffer, "EXTLINUX", buffer_size - 1);
  37         else if (!strncmp(boot_sector + 3, "MSWIN4.1", 8))
  38             strncpy(buffer, "MSWIN4.1", buffer_size - 1);
  39         else
  40             return -1;
  41         /* Add more... */
  42
  43         buffer[buffer_size - 1] = '\0';
  44         return 0;
  45     }
  46 }