projects / unix-history / blame
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1 | .\" Copyright (c) 1988, 1993 |
| 2 | .\" The Regents of the University of California. All rights reserved. | |
| 5fa428b1 | 3 | .\" |
| 79c763b5 KB |
4 | .\" %sccs.include.proprietary.roff% |
| 5 | .\" | |
| b91e3d7f | 6 | .\" @(#)icheck.8 8.1 (Berkeley) %G% |
| 5fa428b1 | 7 | .\" |
| 46e11184 | 8 | .TH ICHECK 8 "" |
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9 | .UC 4 |
| 10 | .SH NAME | |
| 11 | icheck \- file system storage consistency check | |
| 12 | .SH SYNOPSIS | |
| 11aaec31 | 13 | .B icheck |
| 5fa428b1 | 14 | [ |
| 5fa428b1 KM |
15 | .B \-b |
| 16 | numbers ] | |
| 17 | [ filesystem ] | |
| 18 | .SH DESCRIPTION | |
| 19 | .B N.B.: | |
| 20 | .I Icheck | |
| 21 | is obsoleted for normal consistency checking by | |
| 22 | .IR fsck (8). | |
| 23 | .PP | |
| 24 | .I Icheck | |
| 25 | examines a file system, | |
| 26 | builds a bit map of used blocks, | |
| 27 | and compares this bit map against | |
| d1256f9e | 28 | the free map maintained on the file system. |
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29 | If the file system is not specified, |
| 30 | a set of default file systems | |
| 31 | is checked. | |
| 32 | The normal output of | |
| 33 | .I icheck | |
| 34 | includes a report of | |
| 35 | .IP "" | |
| 36 | The total number of files and the numbers of | |
| 37 | regular, directory, block special and character special files. | |
| 38 | .IP "" | |
| 39 | The total number of blocks in use and the numbers of | |
| 40 | single-, double-, and triple-indirect blocks and directory blocks. | |
| 41 | .IP "" | |
| 42 | The number of free blocks. | |
| 43 | .IP "" | |
| 44 | The number of blocks missing; i.e. not in any file | |
| d1256f9e | 45 | nor in any free map. |
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46 | .PP |
| 47 | Following the | |
| 48 | .B \-b | |
| 49 | option is a list of block numbers; | |
| 50 | whenever any of the named blocks turns up in a file, | |
| 51 | a diagnostic is produced. | |
| 52 | .PP | |
| 53 | .I Icheck | |
| 54 | is faster if the raw version of the special file is used, | |
| 55 | since it reads the i-list many blocks at a time. | |
| 56 | .SH FILES | |
| 57 | Default file systems vary with installation. | |
| 58 | .SH "SEE ALSO" | |
| 59 | fsck(8), dcheck(8), ncheck(8), | |
| e46678a9 | 60 | fs(5), clri(8) |
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61 | .SH DIAGNOSTICS |
| 62 | For duplicate blocks | |
| 63 | and bad blocks (which lie outside the file system) | |
| 64 | .I icheck | |
| 65 | announces the difficulty, the i-number, and the kind of block involved. | |
| 66 | If a read error is encountered, | |
| 67 | the block number of the bad block is printed and | |
| 68 | .I icheck | |
| 69 | considers it to contain 0. | |
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70 | .SH BUGS |
| 71 | Since | |
| 72 | .I icheck | |
| 73 | is inherently two-pass in nature, extraneous diagnostics | |
| 74 | may be produced if applied to active file systems. | |
| 75 | .PP | |
| 76 | It believes even preposterous super-blocks and | |
| 77 | consequently can get core images. |