- add DISK install from ISO image file

1 files changed, 170 insertions, 0 deletions

diff --git a/mdk-stage1/lomount.c b/mdk-stage1/lomount.c
new file mode 100644
index 000000000..7150694d1
--- /dev/null
+++ b/mdk-stage1/lomount.c
@@ -0,0 +1,170 @@
+/*
+ * Guillaume Cottenceau (gc@mandrakesoft.com)
+ *
+ * Copyright 2000 MandrakeSoft
+ *
+ * This software may be freely redistributed under the terms of the GNU
+ * public license.
+ *
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+
+/* This code comes from util-linux-2.10n (mount/lomount.c)
+ * (this is a simplified version of this code)
+ */
+
+#include <sys/types.h>
+#include <sys/mount.h>
+#include <sys/ioctl.h>
+#include <sys/mount.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "stage1.h"
+#include "frontend.h"
+#include "log.h"
+#include "mount.h"
+#include "modules.h"
+
+#include "lomount.h"
+
+
+#define LO_NAME_SIZE	64
+#define LO_KEY_SIZE	32
+
+struct loop_info
+{
+	int		lo_number;	/* ioctl r/o */
+	dev_t		lo_device; 	/* ioctl r/o */
+	unsigned long	lo_inode; 	/* ioctl r/o */
+	dev_t		lo_rdevice; 	/* ioctl r/o */
+	int		lo_offset;
+	int		lo_encrypt_type;
+	int		lo_encrypt_key_size; 	/* ioctl w/o */
+	int		lo_flags;	/* ioctl r/o */
+	char		lo_name[LO_NAME_SIZE];
+	unsigned char	lo_encrypt_key[LO_KEY_SIZE]; /* ioctl w/o */
+	unsigned long	lo_init[2];
+	char		reserved[4];
+};
+
+#define LOOP_SET_FD	0x4C00
+#define LOOP_CLR_FD	0x4C01
+#define LOOP_SET_STATUS	0x4C02
+#define LOOP_GET_STATUS	0x4C03
+
+int
+set_loop (const char *device, const char *file)
+{
+	struct loop_info loopinfo;
+	int fd, ffd, mode;
+
+	mode = O_RDONLY;
+
+	if ((ffd = open (file, mode)) < 0)
+		return 1;
+  
+	if ((fd = open (device, mode)) < 0)
+		return 1;
+
+	memset(&loopinfo, 0, sizeof (loopinfo));
+	strncpy(loopinfo.lo_name, file, LO_NAME_SIZE);
+	loopinfo.lo_name[LO_NAME_SIZE - 1] = 0;
+	loopinfo.lo_offset = 0;
+
+#ifdef MCL_FUTURE  
+	/*
+	 * Oh-oh, sensitive data coming up. Better lock into memory to prevent
+	 * passwd etc being swapped out and left somewhere on disk.
+	 */
+  
+	if(mlockall(MCL_CURRENT|MCL_FUTURE)) {
+		log_message("%s (memlock)\n", strerror(errno));
+		log_message("CRITICAL Couldn't lock into memory!\n");
+		return 1;
+	}
+#endif
+
+	if (ioctl(fd, LOOP_SET_FD, ffd) < 0)
+		return 1;
+  
+	if (ioctl(fd, LOOP_SET_STATUS, &loopinfo) < 0) {
+		(void) ioctl (fd, LOOP_CLR_FD, 0);
+		return 1;
+	}
+
+	close(fd);
+	close(ffd);
+	return 0;
+}
+
+int 
+del_loop (const char *device)
+{
+	int fd;
+
+	if ((fd = open (device, O_RDONLY)) < 0)
+		return 1;
+
+	if (ioctl (fd, LOOP_CLR_FD, 0) < 0)
+		return 1;
+  
+	close (fd);
+	return 0;
+}
+
+
+char * loopdev = "/dev/loop3"; /* Ugly. But do I care? */
+
+int
+lomount(char *loopfile, char *where)
+{
+  
+	long int flag;
+
+	flag = MS_MGC_VAL;
+	flag |= MS_RDONLY;
+
+	if (my_insmod("loop", ANY_DRIVER_TYPE, NULL)) {
+		log_message("can't lomount without loop.o kernel driver");
+		return 1;
+	}
+
+	if (set_loop(loopdev, loopfile)) {
+		log_message("set_loop failed on %s (%s)\n", loopdev, strerror(errno));
+		return 1;
+	}
+  
+	if (my_mount(loopdev, where, "iso9660")) {
+		log_message("mount failed: %s\n", strerror(errno));
+		del_loop(loopdev);
+		return 1;
+	}
+
+	log_message("lomount succeded for %s on %s\n", loopfile, where);
+	return 0;
+}
+
+
+int
+loumount()
+{
+	if (umount(loopdev)) {
+		log_perror("loumount");
+		return 1;
+	}
+
+	if (del_loop(loopdev)) {
+		log_perror("del_loop");
+		return 1;
+	}
+	return 0;
+}
+
+