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#include "stdinc.h"
#include "dat.h"
#include "fns.h"
void
usage(void)
{
fprint(2, "usage: printarena arenafile [offset]\n");
threadexitsall("usage");
}
static void
rdarena(Arena *arena, u64int offset)
{
u64int a, aa, e;
u32int magic;
Clump cl;
uchar score[VtScoreSize];
ZBlock *lump;
printarena(2, arena);
a = arena->base;
e = arena->base + arena->size;
if(offset != ~(u64int)0) {
if(offset >= e-a)
sysfatal("bad offset %llud >= %llud\n",
offset, e-a);
aa = offset;
} else
aa = 0;
for(; aa < e; aa += ClumpSize+cl.info.size) {
magic = clumpmagic(arena, aa);
if(magic == ClumpFreeMagic)
break;
if(magic != arena->clumpmagic) {
fprint(2, "illegal clump magic number %#8.8ux offset %llud\n",
magic, aa);
break;
}
lump = loadclump(arena, aa, 0, &cl, score, 0);
if(lump == nil) {
fprint(2, "clump %llud failed to read: %r\n", aa);
break;
}
if(cl.info.type != VtCorruptType) {
scoremem(score, lump->data, cl.info.uncsize);
if(scorecmp(cl.info.score, score) != 0) {
fprint(2, "clump %llud has mismatched score\n", aa);
break;
}
if(vttypevalid(cl.info.type) < 0) {
fprint(2, "clump %llud has bad type %d\n", aa, cl.info.type);
break;
}
}
print("%22llud %V %3d %5d\n", aa, score, cl.info.type, cl.info.uncsize);
freezblock(lump);
}
print("end offset %llud\n", aa);
}
void
threadmain(int argc, char *argv[])
{
char *file;
Arena *arena;
u64int offset, aoffset;
Part *part;
Dir *d;
uchar buf[8192];
ArenaHead head;
readonly = 1; /* for part.c */
aoffset = 0;
ARGBEGIN{
case 'o':
aoffset = strtoull(EARGF(usage()), 0, 0);
break;
default:
usage();
break;
}ARGEND
offset = ~(u64int)0;
switch(argc) {
default:
usage();
case 2:
offset = strtoull(argv[1], 0, 0);
/* fall through */
case 1:
file = argv[0];
}
ventifmtinstall();
statsinit();
if((d = dirstat(file)) == nil)
sysfatal("can't stat file %s: %r", file);
part = initpart(file, OREAD|ODIRECT);
if(part == nil)
sysfatal("can't open file %s: %r", file);
if(readpart(part, aoffset, buf, sizeof buf) < 0)
sysfatal("can't read file %s: %r", file);
if(unpackarenahead(&head, buf) < 0)
sysfatal("corrupted arena header: %r");
print("# arena head version=%d name=%.*s blocksize=%d size=%lld clumpmagic=0x%.8ux\n",
head.version, ANameSize, head.name, head.blocksize,
head.size, head.clumpmagic);
if(aoffset+head.size > d->length)
sysfatal("arena is truncated: want %llud bytes have %llud\n",
head.size, d->length);
partblocksize(part, head.blocksize);
initdcache(8 * MaxDiskBlock);
arena = initarena(part, aoffset, head.size, head.blocksize);
if(arena == nil)
sysfatal("initarena: %r");
rdarena(arena, offset);
threadexitsall(0);
}
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