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Text File | 1991-01-23 | 12.4 KB | 317 lines

QCMP 1.14 --------- Purpose ------- QCMP compares two files, or two groups of files. It is not designed to isolate file differences, but simply to tell you whether or not files are identical. This can be used to verify file-by-file backup operations, for smart batch files, in Personal REXX programs, etc. QCMP is similar to DOS's COMP command except that (1) it doesn't display differences; (2) the display is better suited for automated processing; and (3) it returns a usable errorlevel. Version 1.13 adds SHARE support but makes no other changes. | indicates changes in recent versions. Usage ----- Here is the syntax for running QCMP: qcmp filespec1 filespec2 [-Dn] [-H] [-T] Usage is largely the same as DOS's COMP command except that QCMP does not prompt for missing input, and the three option switches are not found in COMP. The optional switches can be introduced by either a hypen (-) or a slash (/). Filespec1 can be any valid file or directory specification: d: Drive only path Path only d:file.ext Drive, filename, extension path\file.ext Path, filename, extension d:path\file.ext Drive:path. filename, extension If no drive is specified, the current drive is assumed. If no path is specified, the current directory for the selected drive is assumed. If no filename is specified, "*.*" (all files) is assumed. If no extension is specified, "*" is assumed. If you really want to check a file that has no extension, use a single "." with no extension. For example, "foo" is assumed to be "foo.*", but "foo." matches only a file called "foo" (not "foo.txt"). Filespec2 is identical to filespec1 except that a missing filename will default to the filename used in filespec1 rather than "*.*". Examples: qcmp *.* b: Compare all files in current directory of current drive with files of the same name on drive B: qcmp a: b: Compare all files on drive A: to same files on drive B:. qcmp \asm\*.asm b:*.bak Compare all *.ASM files in \ASM directory of current drive to files with same root name but .BAK extension on drive B. Display levels -------------- The -D (Display level) switch affects the results messages that are displayed. Valid display levels are: -D0 No display; return errorlevel only. -D1 Display results only for comparison errors -D2 Display results for all files compared The -D0 level is intended for batch files and Personal REXX programs (or other programs that can execute QCMP and examine the result code). The -D2 level is the default. Checking the timestamp ---------------------- If two files have identical contents, QCMP will normally consider them to be the same even if their dates or times differ. However, if you use the -T switch, QCMP will also compare the files' modification dates and times; if they are different, the files are reported as being different, even if their contents are the same. Including hidden files ---------------------- If you want to include hidden files such as IBMBIO.COM in your comparisons, add the -H switch. For example, qcmp -h c:\*.* b: would compare all of the files in the root directory of drive C with copies on drive B, including hidden files (possibly, IBMBIO.COM and IBMSYS.COM). Without the -H, hidden files would not be included. Results (display) ----------------- For each matching file, QCMP will display the following line: filespec1 - filespec2 > result where FILESPEC1 and FILESPEC2 are the two files currently being compared, and RESULT is the comparison result. RESULT is one of the following: OK Files are identical ERROR Files are same size but not identical SIZE DIFF Files are different sizes READ ERROR Error reading one of the files. DATE/TIME DIFF Files' timestamps are different (this error reported only if -T selected) <file> NOT FOUND Named file not found Note that the -D1 display level suppresses the display of files for which the result is "OK". Results (errorlevel) -------------------- QCMP returns an errorlevel to DOS that describes the comparison results. Errorlevel are as follows: 0 All files are identical (all "OK") 1 At least one comparison failed 254 No files found matching first filespec 255 Usage error, disk error, or insufficient memory Note that if you specify the -d0 display level, ONLY the error level is returned; there is no display at all. When -d0 is specified, QCMP will terminate as soon as an errorlevel is determined; for example, it will not bother to continue comparing more files after one comparison fails, because the errorlevel must be 1 regardless of the results of subsequent comparisons. Sample use: batch files ----------------------- 1. Branch to BACKUP if any *.ASM file in current drive is not preperly backed up to B:*.BAK, else continue. qcmp -d0 *.asm b:*.bak If errorlevel 255 goto QCERR If errorlevel 254 goto NOFILES If errorlevel 1 goto BACKUP ... (all files OK) ... :BACKUP ... (needs backup) ... :NOFILES ... (no files match filespec1) :QCERR ... (error in qcmp, or no matching files) ... 2. Back up any file in current directory that needs backup to drive B. This requires two batch files, one called by the other using the technique of executing another copy of COMMAND.COM with the second batch file as a parameter. BAK.BAT: FOR %%a IN (*.*) DO command /c xxbak %%a XXBAK.BAT: qcmp -d0 %1 b: IF NOT errorlevel 1 GOTO OK echo Backing up %1 copy %1 b: GOTO exit :OK echo %1 is backed up :EXIT Sample use: Personal REXX ------------------------- 1. Determine whether all files in current directory were backed up successfully to drive b: 'qcmp -d0 *.* b:' If rc = 0 Then Say 'All files backed up OK' Else If rc = 1 Then Say 'Error in backup!' Else If rc = 254 Then Say 'No Matching files' Else If rc = 255 Then Say 'qcmp error!' 2. Create a list of files that need to be backed up from the current directory of drive C to drive B, and back them all up. The sample code assumes that STACKDRV and STACKMGR are installed; without the STK device, the same could be accomplised by redirecting output to a temporary file, reading the file line by line, and then deleting the file. 'qcmp c: b: > stk' If rc > 1 Then Do Say 'Error invoking qcmp' Exit End count = 0 Do While lines('stk') > 0 parse value linein('stk') with f1 ' - ' . ' > ' err If err <> 'OK' Then Do count = count+1 file.count = f1 error.count = err End End If count = 0 Then Say 'All files backed up OK' Else Do i = 1 To Count Say 'Backing up' file.i '(result = ' error.i')' 'copy file.i b:' End NOTE: after the WHILE loop, COUNT contains the number of compare errors; FILE. contains an array of files not properly backed up, and ERROR. contains the error text associated with FILE. Indices to FILE. and ERROR. are the integers from 1 to COUNT. Revision history ---------------- Version 1.14 - 01/23/91 File sharing support released Internal changes Version 1.13 - 09/11/89 Not released Version 1.12 - 04/03/89 Added -H switch Corrected improper parsing of ".." directory when ".." evaluates to the root directory. Version 1.11 - 07/23/88 Corrected case sensitivity of -T switch ("it's always something" - R. Roseannadanna) Version 1.10 - 07/06/88 Added -T switch. Added default '*' extension Protected from erroneous comparisons generated through use of file pathing utilities or DOS's APPEND command. Protected from disk read errors. Allowed '/' as well as '-' for switch character and removed position dependency of switches. Version 1.00 - 11/11/86 First public release Copyright/License/Warranty -------------------------- This document and the program file QCMP.EXE ("the software") are copyrighted by the author. The copyright owner hereby licenses you to: use the software; make as many copies of the program and documentation as you wish; give such copies to anyone; and distribute the software and documentation via electronic means. There is no charge for any of the above. However, you are specifically prohibited from charging, or requesting donations, for any such copies, however made; and from distributing the software and/or documentation with commercial products without prior permission. An exception is granted to not-for-profit user's groups, which are authorized to charge a small fee for materials, handling, postage, and general overhead. NO FOR-PROFIT ORGANIZATION IS AUTHORIZED TO CHARGE ANY AMOUNT FOR DISTRIBUTION OF COPIES OF THE SOFTWARE OR DOCUMENTATION, OR TO INCLUDE COPIES OF THE SOFTWARE OR DOCUMENTATION WITH SALES OF THEIR OWN PRODUCTS. THIS INCLUDES A SPECIFIC PROHIBITION AGAINST FOR-PROFIT ORGANIZATIONS DISTRIBUTING THE SOFTWARE, EITHER ALONE OR WITH OTHER SOFTWARE, AND CHARGING A "HANDLING" OR "MATERIALS" FEE OR ANY OTHER SUCH FEE FOR THE DISTRIBUTION. NO FOR-PROFIT ORGANIZATION IS AUTHORIZED TO INCLUDE THE SOFTWARE ON ANY MEDIA FOR WHICH MONEY IS CHARGED. PERIOD. There is no restriction on the use of this software in commercial or institutional environments. No copy of the software may be distributed or given away without this document; and this notice must not be removed. There is no warranty of any kind, and the copyright owner is not liable for damages of any kind. By using this free software, you agree to this. The software and documentation are Copyright (C) 1986,1988,1989,1991 by The Cove Software Group Christopher J. Dunford P.O. Box 1072 Columbia, Maryland 21044 (301) 992-9371 CompuServe 76703,2002 [IBMNET] Personal REXX is a trademark of the Mansfield Software Group.