diff options
Diffstat (limited to 'src/cmd/venti/verifyarena.c')
-rw-r--r-- | src/cmd/venti/verifyarena.c | 127 |
1 files changed, 0 insertions, 127 deletions
diff --git a/src/cmd/venti/verifyarena.c b/src/cmd/venti/verifyarena.c deleted file mode 100644 index 9e7dc31b..00000000 --- a/src/cmd/venti/verifyarena.c +++ /dev/null @@ -1,127 +0,0 @@ -#include "stdinc.h" -#include "dat.h" -#include "fns.h" - -static int verbose; - -void -usage(void) -{ - fprint(2, "usage: verifyarena [-v]\n"); - threadexitsall(0); -} - -static void -readblock(uchar *buf, int n) -{ - int nr, m; - - for(nr = 0; nr < n; nr += m){ - m = n - nr; - m = read(0, &buf[nr], m); - if(m <= 0) - sysfatal("can't read arena from standard input: %r"); - } -} - -static void -verifyarena(void) -{ - Arena arena; - ArenaHead head; - ZBlock *b; - DigestState s; - u64int n, e; - u32int bs; - u8int score[VtScoreSize]; - - fprint(2, "verify arena from standard input\n"); - - memset(&arena, 0, sizeof arena); - memset(&s, 0, sizeof s); - - /* - * read the little bit, which will included the header - */ - bs = MaxIoSize; - b = alloczblock(bs, 0); - readblock(b->data, HeadSize); - sha1(b->data, HeadSize, nil, &s); - if(unpackarenahead(&head, b->data) < 0) - sysfatal("corrupted arena header: %r"); - if(head.version != ArenaVersion) - fprint(2, "warning: unknown arena version %d\n", head.version); - - /* - * now we know how much to read - * read everything but the last block, which is special - */ - e = head.size - head.blocksize; - for(n = HeadSize; n < e; n += bs){ - if(n + bs > e) - bs = e - n; - readblock(b->data, bs); - sha1(b->data, bs, nil, &s); - } - - /* - * read the last block update the sum. - * the sum is calculated assuming the slot for the sum is zero. - */ - bs = head.blocksize; - readblock(b->data, bs); - sha1(b->data, bs-VtScoreSize, nil, &s); - sha1(zeroscore, VtScoreSize, nil, &s); - sha1(nil, 0, score, &s); - - /* - * validity check on the trailer - */ - arena.blocksize = head.blocksize; - if(unpackarena(&arena, b->data) < 0) - sysfatal("corrupted arena trailer: %r"); - scorecp(arena.score, &b->data[arena.blocksize - VtScoreSize]); - - if(namecmp(arena.name, head.name) != 0) - sysfatal("arena header and trailer names clash: %s vs. %s\n", head.name, arena.name); - if(arena.version != head.version) - sysfatal("arena header and trailer versions clash: %d vs. %d\n", head.version, arena.version); - arena.size = head.size - 2 * head.blocksize; - - /* - * check for no checksum or the same - */ - if(scorecmp(score, arena.score) != 0){ - if(scorecmp(zeroscore, arena.score) != 0) - fprint(2, "warning: mismatched checksums for arena=%s, found=%V calculated=%V", - arena.name, arena.score, score); - scorecp(arena.score, score); - }else - fprint(2, "matched score\n"); - - printarena(2, &arena); -} - -void -threadmain(int argc, char *argv[]) -{ - fmtinstall('V', vtscorefmt); - statsinit(); - - ARGBEGIN{ - case 'v': - verbose++; - break; - default: - usage(); - break; - }ARGEND - - readonly = 1; - - if(argc != 0) - usage(); - - verifyarena(); - threadexitsall(0); -} |