minix/lib/libminlib/fslib.c
Lionel Sambuc 84d9c625bf Synchronize on NetBSD-CVS (2013/12/1 12:00:00 UTC)
- Fix for possible unset uid/gid in toproto
 - Fix for default mtree style
 - Update libelf
 - Importing libexecinfo
 - Resynchronize GCC, mpc, gmp, mpfr
 - build.sh: Replace params with show-params.
     This has been done as the make target has been renamed in the same
     way, while a new target named params has been added. This new
     target generates a file containing all the parameters, instead of
     printing it on the console.
 - Update test48 with new etc/services (Fix by Ben Gras <ben@minix3.org)
     get getservbyport() out of the inner loop

Change-Id: Ie6ad5226fa2621ff9f0dee8782ea48f9443d2091
2014-07-28 17:05:06 +02:00

59 lines
1.8 KiB
C

/* fslib.c - routines needed by fs and fs utilities */
#include <minix/config.h> /* for unused stuff in <minix/type.h> :-( */
#include <limits.h>
#include <dirent.h>
#include <sys/types.h>
#include <minix/const.h>
#include <minix/type.h> /* for unshort :-( */
#include <minix/sysutil.h>
#include <minix/minlib.h>
#include "mfs/const.h" /* depends of -I flag in Makefile */
#include "mfs/type.h" /* ditto */
#include "mfs/inode.h" /* ditto */
#include "mfs/super.h"
#include <minix/fslib.h>
#include <sys/stat.h>
/* The next routine is copied from fsck.c and mkfs.c... (Re)define some
* things for consistency. Some things should be done better.
*/
/* Convert from bit count to a block count. The usual expression
*
* (nr_bits + (1 << BITMAPSHIFT) - 1) >> BITMAPSHIFT
*
* doesn't work because of overflow.
*
* Other overflow bugs, such as the expression for N_ILIST overflowing when
* s_inodes is just over V*_INODES_PER_BLOCK less than the maximum+1, are not
* fixed yet, because that number of inodes is silly.
*/
/* The above comment doesn't all apply now bit_t is long. Overflow is now
* unlikely, but negative bit counts are now possible (though unlikely)
* and give silly results.
*/
int bitmapsize(nr_bits, block_size)
bit_t nr_bits;
int block_size;
{
int nr_blocks;
nr_blocks = (int) (nr_bits / FS_BITS_PER_BLOCK(block_size));
if (((bit_t) nr_blocks * FS_BITS_PER_BLOCK(block_size)) < nr_bits) ++nr_blocks;
return(nr_blocks);
}
uint8_t fs_mode_to_type(mode_t mode)
{
if(S_ISREG(mode)) return DT_REG;
else if(S_ISDIR(mode)) return DT_DIR;
else if(S_ISLNK(mode)) return DT_LNK;
else if(S_ISCHR(mode)) return DT_CHR;
else if(S_ISBLK(mode)) return DT_BLK;
else if(S_ISFIFO(mode)) return DT_FIFO;
else if(S_ISSOCK(mode)) return DT_SOCK;
panic("unknown type, mode 0x%x", mode);
}