int
add_dev(ARCHD *arcn)
{
if (chk_dev(arcn->sb.st_dev, 1) == NULL)
return -1;
return 0;
}
int
add_dev(ARCHD *arcn)
{
if (chk_dev(arcn->sb.st_dev, 1) == NULL)
return(-1);
return(0);
}
int
map_dev(ARCHD *arcn, u_long dev_mask, u_long ino_mask)
{
DEVT *pt;
DLIST *dpt;
static dev_t lastdev = 0; /* next device number to try */
int trc_ino = 0;
int trc_dev = 0;
ino_t trunc_bits = 0;
ino_t nino;
if (dtab == NULL)
return 0;
/*
* check for device and inode truncation, and extract the truncated
* bit pattern.
*/
if ((arcn->sb.st_dev & (dev_t)dev_mask) != arcn->sb.st_dev)
++trc_dev;
if ((nino = arcn->sb.st_ino & (ino_t)ino_mask) != arcn->sb.st_ino) {
++trc_ino;
trunc_bits = arcn->sb.st_ino & (ino_t)(~ino_mask);
}
/*
* see if this device is already being mapped, look up the device
* then find the truncation bit pattern which applies
*/
if ((pt = chk_dev(arcn->sb.st_dev, 0)) != NULL) {
/*
* this device is already marked to be remapped
*/
for (dpt = pt->list; dpt != NULL; dpt = dpt->fow)
if (dpt->trunc_bits == trunc_bits)
break;
if (dpt != NULL) {
/*
* we are being remapped for this device and pattern
* change the device number to be stored and return
*/
arcn->sb.st_dev = dpt->dev;
arcn->sb.st_ino = nino;
return 0;
}
} else {
/*
* this device is not being remapped YET. if we do not have any
* form of truncation, we do not need a remap
*/
if (!trc_ino && !trc_dev)
return 0;
/*
* we have truncation, have to add this as a device to remap
*/
if ((pt = chk_dev(arcn->sb.st_dev, 1)) == NULL)
goto bad;
/*
* if we just have a truncated inode, we have to make sure that
* all future inodes that do not truncate (they have the
* truncation pattern of all 0's) continue to map to the same
* device number. We probably have already written inodes with
* this device number to the archive with the truncation
* pattern of all 0's. So we add the mapping for all 0's to the
* same device number.
*/
if (!trc_dev && (trunc_bits != 0)) {
if ((dpt = (DLIST *)malloc(sizeof(DLIST))) == NULL)
goto bad;
dpt->trunc_bits = 0;
dpt->dev = arcn->sb.st_dev;
dpt->fow = pt->list;
pt->list = dpt;
}
}
/*
* look for a device number not being used. We must watch for wrap
* around on lastdev (so we do not get stuck looking forever!)
*/
while (++lastdev > 0) {
if (chk_dev(lastdev, 0) != NULL)
continue;
/*
* found an unused value. If we have reached truncation point
* for this format we are hosed, so we give up. Otherwise we
* mark it as being used.
*/
if (((lastdev & ((dev_t)dev_mask)) != lastdev) ||
(chk_dev(lastdev, 1) == NULL))
goto bad;
break;
}
if ((lastdev <= 0) || ((dpt = (DLIST *)malloc(sizeof(DLIST))) == NULL))
goto bad;
/*
* got a new device number, store it under this truncation pattern.
* change the device number this file is being stored with.
*/
dpt->trunc_bits = trunc_bits;
dpt->dev = lastdev;
dpt->fow = pt->list;
pt->list = dpt;
arcn->sb.st_dev = lastdev;
arcn->sb.st_ino = nino;
return 0;
bad:
tty_warn(1,
"Unable to fix truncated inode/device field when storing %s",
arcn->name);
tty_warn(0, "Archive may create improper hard links when extracted");
return 0;
}
