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plan 9 import

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This commit is contained in:
rsc 2006-05-21 18:24:59 +00:00
parent 3bff492520
commit 38c7eb9bd2
4 changed files with 20 additions and 6 deletions
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17
src/cmd/tapefs/32vfs.c
View file

@ -20,9 +20,11 @@
#define VSUPERB 1
#define VROOT 2 /* root inode */
#define VNAMELEN 14
#define BLSIZE 512
#define MAXBLSIZE 1024
int BLSIZE;
#define LINOPB (BLSIZE/sizeof(struct v32dinode))
#define LNINDIR (BLSIZE/sizeof(unsigned long))
#define LNINDIR (BLSIZE/4)
#define MAXLNINDIR (MAXBLSIZE/4)
struct v32dinode {
unsigned char flags[2];
@ -51,6 +53,13 @@ populate(char *name)
{
Fileinf f;
BLSIZE = 512; /* 32v */
if(blocksize){
/* 1024 for 4.1BSD */
if(blocksize != 512 && blocksize != 1024)
error("bad block size");
BLSIZE = blocksize;
}
replete = 0;
tapefile = open(name, OREAD);
if (tapefile<0)
@ -106,7 +115,7 @@ docreate(Ram *r)
char *
doread(Ram *r, vlong off, long cnt)
{
static char buf[Maxbuf+BLSIZE];
static char buf[Maxbuf+MAXBLSIZE];
int bno, i;
bno = off/BLSIZE;
@ -147,7 +156,7 @@ dopermw(Ram *r)
Fileinf
iget(int ino)
{
char buf[BLSIZE];
char buf[MAXBLSIZE];
struct v32dinode *dp;
long flags, i;
Fileinf f;

1
src/cmd/tapefs/fs.c
View file

@ -16,6 +16,7 @@ ulong path;
Idmap *uidmap;
Idmap *gidmap;
int replete;
int blocksize; /* for 32v */
int verbose;
int newtap; /* tap with time in sec */

6
src/cmd/tapefs/tapefs.h
View file

@ -3,7 +3,10 @@
#define g2byte(x) (((x)[1]<<8) + (x)[0]) /* little-endian */
#define g3byte(x) (((x)[2]<<16) + ((x)[1]<<8) + (x)[0])
#define g4byte(x) (((x)[3]<<24) + ((x)[2]<<16) + ((x)[1]<<8) + (x)[0])
#define g8byte(x) (((vlong)g4byte(x)<<32) | (u32int)g4byte(x+4))
/* big endian */
#define b4byte(x) (((x)[0]<<24) + ((x)[1]<<16) + ((x)[2]<<8) + (x)[3])
#define b8byte(x) (((vlong)b4byte(x)<<32) | (u32int)b4byte((x)+4))
enum
{
@ -78,6 +81,7 @@ extern char *user;
extern Idmap *uidmap;
extern Idmap *gidmap;
extern int replete;
extern int blocksize;
void error(char*);
void *erealloc(void*, ulong);
void *emalloc(ulong);

2
src/cmd/tapefs/tarfs.c
View file

@ -53,7 +53,7 @@ populate(char *name)
f.uid = strtoul(dblock.dbuf.uid, 0, 8);
f.gid = strtoul(dblock.dbuf.gid, 0, 8);
if((uchar)dblock.dbuf.size[0] == 0x80)
f.size = g8byte(dblock.dbuf.size+3);
f.size = b8byte(dblock.dbuf.size+3);
else
f.size = strtoull(dblock.dbuf.size, 0, 8);
f.mdate = strtoul(dblock.dbuf.mtime, 0, 8);