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- #include "stdinc.h"
- #include "dat.h"
- #include "fns.h"
- static int verbose;
- void
- usage(void)
- {
- fprint(2, "usage: rdarena [-v] arenapart arena\n");
- exits(0);
- }
- static void
- rdArena(Arena *arena)
- {
- ZBlock *b;
- u64int a, e;
- u32int bs;
- fprint(2, "copying %s to standard output\n", arena->name);
- printArena(2, arena);
- bs = MaxIoSize;
- if(bs < arena->blockSize)
- bs = arena->blockSize;
- b = allocZBlock(bs, 0);
- e = arena->base + arena->size + arena->blockSize;
- for(a = arena->base - arena->blockSize; a + arena->blockSize <= e; a += bs){
- if(a + bs > e)
- bs = arena->blockSize;
- if(!readPart(arena->part, a, b->data, bs))
- fprint(2, "can't copy %s, read at %lld failed: %r\n", arena->name, a);
- if(write(1, b->data, bs) != bs)
- fatal("can't copy %s, write at %lld failed: %r", arena->name, a);
- }
- freeZBlock(b);
- }
- void
- main(int argc, char *argv[])
- {
- ArenaPart *ap;
- Part *part;
- char *file, *aname;
- int i;
- fmtinstall('V', vtScoreFmt);
- fmtinstall('R', vtErrFmt);
- vtAttach();
- statsInit();
- ARGBEGIN{
- case 'v':
- verbose++;
- break;
- default:
- usage();
- break;
- }ARGEND
- readonly = 1;
- if(argc != 2)
- usage();
- file = argv[0];
- aname = argv[1];
- part = initPart(file, 0);
- if(part == nil)
- fatal("can't open partition %s: %r", file);
- ap = initArenaPart(part);
- if(ap == nil)
- fatal("can't initialize arena partition in %s: %R", file);
- if(verbose)
- printArenaPart(2, ap);
- initDCache(8 * MaxDiskBlock);
- for(i = 0; i < ap->narenas; i++){
- if(strcmp(ap->arenas[i]->name, aname) == 0){
- rdArena(ap->arenas[i]);
- exits(0);
- }
- }
- sysfatal("couldn't find arena %s\n", aname);
- }
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