mirror of
https://github.com/sheumann/hush.git
synced 2024-11-05 06:07:00 +00:00
117 lines
2.6 KiB
C
117 lines
2.6 KiB
C
/*
|
|
* dev.c - allocation/initialization/free routines for dev
|
|
*
|
|
* Copyright (C) 2001 Andreas Dilger
|
|
* Copyright (C) 2003 Theodore Ts'o
|
|
*
|
|
* %Begin-Header%
|
|
* This file may be redistributed under the terms of the
|
|
* GNU Lesser General Public License.
|
|
* %End-Header%
|
|
*/
|
|
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
#include "blkidP.h"
|
|
|
|
blkid_dev blkid_new_dev(void)
|
|
{
|
|
blkid_dev dev;
|
|
|
|
if (!(dev = (blkid_dev) calloc(1, sizeof(struct blkid_struct_dev))))
|
|
return NULL;
|
|
|
|
INIT_LIST_HEAD(&dev->bid_devs);
|
|
INIT_LIST_HEAD(&dev->bid_tags);
|
|
|
|
return dev;
|
|
}
|
|
|
|
void blkid_free_dev(blkid_dev dev)
|
|
{
|
|
if (!dev)
|
|
return;
|
|
|
|
DBG(DEBUG_DEV,
|
|
printf(" freeing dev %s (%s)\n", dev->bid_name, dev->bid_type));
|
|
DEB_DUMP_DEV(DEBUG_DEV, dev);
|
|
|
|
list_del(&dev->bid_devs);
|
|
while (!list_empty(&dev->bid_tags)) {
|
|
blkid_tag tag = list_entry(dev->bid_tags.next,
|
|
struct blkid_struct_tag,
|
|
bit_tags);
|
|
blkid_free_tag(tag);
|
|
}
|
|
if (dev->bid_name)
|
|
free(dev->bid_name);
|
|
free(dev);
|
|
}
|
|
|
|
/*
|
|
* Given a blkid device, return its name
|
|
*/
|
|
extern const char *blkid_dev_devname(blkid_dev dev)
|
|
{
|
|
return dev->bid_name;
|
|
}
|
|
|
|
/*
|
|
* dev iteration routines for the public libblkid interface.
|
|
*
|
|
* These routines do not expose the list.h implementation, which are a
|
|
* contamination of the namespace, and which force us to reveal far, far
|
|
* too much of our internal implemenation. I'm not convinced I want
|
|
* to keep list.h in the long term, anyway. It's fine for kernel
|
|
* programming, but performance is not the #1 priority for this
|
|
* library, and I really don't like the tradeoff of type-safety for
|
|
* performance for this application. [tytso:20030125.2007EST]
|
|
*/
|
|
|
|
/*
|
|
* This series of functions iterate over all devices in a blkid cache
|
|
*/
|
|
#define DEV_ITERATE_MAGIC 0x01a5284c
|
|
|
|
struct blkid_struct_dev_iterate {
|
|
int magic;
|
|
blkid_cache cache;
|
|
struct list_head *p;
|
|
};
|
|
|
|
extern blkid_dev_iterate blkid_dev_iterate_begin(blkid_cache cache)
|
|
{
|
|
blkid_dev_iterate iter;
|
|
|
|
iter = xmalloc(sizeof(struct blkid_struct_dev_iterate));
|
|
iter->magic = DEV_ITERATE_MAGIC;
|
|
iter->cache = cache;
|
|
iter->p = cache->bic_devs.next;
|
|
return (iter);
|
|
}
|
|
|
|
/*
|
|
* Return 0 on success, -1 on error
|
|
*/
|
|
extern int blkid_dev_next(blkid_dev_iterate iter,
|
|
blkid_dev *dev)
|
|
{
|
|
*dev = 0;
|
|
if (!iter || iter->magic != DEV_ITERATE_MAGIC ||
|
|
iter->p == &iter->cache->bic_devs)
|
|
return -1;
|
|
*dev = list_entry(iter->p, struct blkid_struct_dev, bid_devs);
|
|
iter->p = iter->p->next;
|
|
return 0;
|
|
}
|
|
|
|
extern void blkid_dev_iterate_end(blkid_dev_iterate iter)
|
|
{
|
|
if (!iter || iter->magic != DEV_ITERATE_MAGIC)
|
|
return;
|
|
iter->magic = 0;
|
|
free(iter);
|
|
}
|
|
|