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/*
* jaZip for Linux (c) 1996 Jarrod A. Smith
*
* Permission to use, copy, modify, and distribute this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation. No representations are made about the suitability of this
* software for any purpose. It is provided "as is" without express or
* implied warranty.
*/
#include <mntent.h>
/* Use sys/mount.h instead of now deprecated method of using kernel header
linux/fs.h - Matthew Wilcox <willy@debian.org> */
#include <sys/mount.h>
#include <sys/vfs.h>
#include <X11/forms.h>
#include <errno.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/stat.h>
#include <sys/types.h>
#include "jazip.h"
/* Copy the definition of struct partition from the kernel header instead
of including kernel header linux/genhd.h
Daniel Schepler <schepler@math.berkeley.edu> */
struct partition {
unsigned char boot_ind;
unsigned char head;
unsigned char sector;
unsigned char cyl;
unsigned char sys_ind;
unsigned char end_head;
unsigned char end_sector;
unsigned char end_cyl;
unsigned int start_sect;
unsigned int nr_sects;
} __attribute__((packed));
#define MAXIMUM_PARTS 60
#define SECTOR_SIZE 512
#define offset(b, n) ((struct partition *)((b) + 0x1be + \
(n) * sizeof(struct partition)))
char buffer[SECTOR_SIZE]; /* first four partitions */
char *buffers[MAXIMUM_PARTS] = {buffer, buffer, buffer, buffer};
uint offsets[MAXIMUM_PARTS] = {0, 0, 0, 0};
/* partitions */
struct partition *part_table[MAXIMUM_PARTS] = {offset(buffer, 0), offset(buffer, 1),
offset(buffer, 2), offset(buffer, 3)};
struct systypes {
unsigned char index;
char *name;
char *fstype;
} sys_types[] = {
{0, "Empty", "unknown"},
{1, "DOS 12-bit FAT", "msdos"},
{4, "DOS 16-bit <32M", "vfat"},
{5, "Extended", "unknown"},
{6, "DOS 16-bit >=32M", "vfat"},
{0xb, "Win95 FAT32", "fat32"},
{0x81, "Linux/MINIX", "ext"},
{0x82, "Linux swap", "swap"},
{0x83, "Linux native", "ext2"},
};
char *partition_type(unsigned char type)
{
int high = sizeof(sys_types) / sizeof(struct systypes),
low = 0, mid;
uint tmp;
while (high >= low) {
mid = (high + low) >> 1;
if ((tmp = sys_types[mid].index) == type)
return sys_types[mid].fstype;
else if (tmp < type)
low = mid + 1;
else high = mid - 1;
}
return NULL;
}
int z_mount( char *dev )
{
FILE *jazipconf, *mtab;
struct mntent *mp;
struct stat s;
struct statfs fs;
struct partition *p;
int mntopt=0, tmp, i;
int fd, partitions = 4;
char *type, perm_stat[32], pname[10];
if (is_mounted( dev )) {
sprintf (mesg, "%s is already mounted as %s on %s.", mnt_fsname, mnt_type, mnt_dir);
return (0);
}
/*Read the partition table from the disk and find a filesystem to mount*/
seteuid(0);
if ((fd = open (dev, O_RDONLY)) < 0){
sprintf (mesg, "Couldn't open %s. Is there a disk in the drive?", dev);
seteuid(getuid());
return (0);
}
if (SECTOR_SIZE != read(fd, buffer, SECTOR_SIZE)){
sprintf (mesg, "Error reading the partition table.");
close (fd);
seteuid(getuid());
return (0);
} else close (fd);
seteuid(getuid());
/* Get the correct line from IOMEGA_FSTAB */
if (!(jazipconf = setmntent (IOMEGA_FSTAB, "r"))) {
sprintf (mesg, "Unable to read %s: %s.", dev, strerror (errno));
return (0);
}
for(i=1; i<=conf; i++) mp = getmntent (jazipconf);
endmntent (jazipconf);
/* Get the first partition only */
for (i=0; i<partitions; i++)
if ((p = part_table[i])->sys_ind)
break;
sprintf( mp->mnt_fsname, "%7s%-1d", dev, i+1 );
mp->mnt_type = partition_type( p->sys_ind );
strcpy( mp->mnt_opts, "defaults");
mp->mnt_freq = 0;
mp->mnt_passno = 0;
/* Check to make sure the mount point exists. */
if (tmp=stat (mp->mnt_dir, &s)) {
sprintf (mesg, "Couldn't find mount point %s specified in %s.",
mp->mnt_dir, IOMEGA_FSTAB);
return( 0 );
}
if (dostatus (dev) != 0) {
strcpy (perm_stat, "write-protected ");
mntopt=MS_NOSUID|MS_RDONLY;
} else {
strcpy (perm_stat, "");
mntopt=MS_NOSUID&~MS_RDONLY;
}
if (!lock_mtab()) {
sprintf (mesg, "Unable to create lock-file. Mount denied.");
return (0);
}
seteuid(0);
if (!mount (mp->mnt_fsname,mp->mnt_dir,mp->mnt_type,0xc0ed0000|mntopt,"" )) {
sprintf (mesg, "Mounted %s%s disk on %s", perm_stat, mp->mnt_type, mp->mnt_dir);
if (!(mtab = setmntent(MOUNTED, "a"))) {
printf ("ERROR! Couldn't write entry to %s.", MOUNTED);
endmntent (mtab);
unlink (LOCK_FILE);
exit (-1);
} else {
addmntent (mtab, mp);
endmntent (mtab);
unlink (LOCK_FILE);
seteuid(getuid());
return (1);
}
} else {
sprintf (mesg, "Error trying to mount %s : %s", dev, strerror (errno));
unlink (LOCK_FILE);
seteuid(getuid());
return (0);
}
seteuid(getuid());
}
int lock_mtab()
{
int fd;
seteuid(0);
if ((fd = open (LOCK_FILE, O_WRONLY | O_CREAT | O_EXCL, 0744)) < 0){
seteuid(getuid());
return 0;
}else{
close (fd);
seteuid(getuid());
return (1);
}
}
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