05079: CHDMan: addmeta and delmeta commands does not work as intended. "file not writeable"

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
05079	Misc.	Trivial	Always	Dec 7, 2012, 04:55	Dec 13, 2012, 23:20

Tester	KingTut	View Status	Public	Platform	MAME (Official Binary)
Assigned To		Resolution	Open	OS	Windows Vista/7 (32-bit)
Status [?]	Acknowledged			Driver
Version	0.147u3	Fixed in Version		Build	Normal
		Fixed in Git Commit		Github Pull Request #

Summary	05079: CHDMan: addmeta and delmeta commands does not work as intended. "file not writeable"
Description	The following message is displayed when using these two commands. "file not writeable"
Steps To Reproduce	Used a29a02.chd as an example. CHDMan info [v0.147u3] D:\>chdman-0.147u3 info -i "a29a02.chd" chdman - MAME Compressed Hunks of Data (CHD) manager 0.147u3 (Nov 19 2012) Input file: a29a02.chd File Version: 5 Logical size: 32,112,640 bytes Hunk Size: 4,096 bytes Total Hunks: 7,840 Unit Size: 512 bytes Total Units: 62,720 Compression: lzma (LZMA), zlib (Deflate), huff (Huffman), flac (FLAC) CHD size: 16,153,397 bytes Ratio: 50.3% SHA1: 00afad399737652b3e17257c70a19f62e37f3c97 Data SHA1: b5d3531acaa6a7215899662bb6c1d1d549d834d2 Metadata: Tag='GDDD' Index=0 Length=33 bytes CYLS:490,HEADS:4,SECS:32,BPS:512. Metadata: Tag='IDNT' Index=0 Length=512 bytes ..........@. ....... 1145710G06D42314......AH D.231aSDnsi CHDMan dumpmeta [v0.147u3] D:\>chdman-0.147u3 dumpmeta -i "a29a02.chd" -o "a29a02 [-t IDNT -ix 0]" -t IDNT -ix 0 chdman - MAME Compressed Hunks of Data (CHD) manager 0.147u3 (Nov 19 2012) File (a29a02 [-t IDNT -ix 0]) written, 512 bytes CHDMan delmeta [v0.147u3] D:\>chdman-0.147u3 delmeta -i "a29a02.chd" -t IDNT -ix 0 chdman - MAME Compressed Hunks of Data (CHD) manager 0.147u3 (Nov 19 2012) Error opening CHD file (a29a02.chd): file not writeable CHDMan addmeta [v0.147u3] D:\>chdman-0.147u3 addmeta -i "a29a02.chd" -t IDNT -ix 0 -vf "a29a02 [-t IDNT -ix 0]" chdman - MAME Compressed Hunks of Data (CHD) manager 0.147u3 (Nov 19 2012) Error opening CHD file (a29a02.chd): file not writeable In order to complete this, I have to use CHDMan from MAME 0.146 release for these two commands to work successfully. CHDMan delmeta [v0.146] D:\>chdman-0.146 delmeta -i "a29a02.chd" -t IDNT -ix 0 chdman - MAME Compressed Hunks of Data (CHD) manager 0.146 (May 21 2012) Input file: a29a02.chd Tag: IDNT Index: 0 Metadata removed CHDMan info [v0.146] D:\>chdman-0.146 info -i "a29a02.chd" chdman - MAME Compressed Hunks of Data (CHD) manager 0.146 (May 21 2012) Input file: a29a02.chd File Version: 5 Logical size: 32,112,640 bytes Hunk Size: 4,096 bytes Total Hunks: 7,840 Unit Size: 512 bytes Total Units: 62,720 Compression: lzma (LZMA), zlib (Deflate), huff (Huffman), flac (FLAC) CHD size: 16,153,397 bytes Ratio: 50.3% SHA1: 00afad399737652b3e17257c70a19f62e37f3c97 Data SHA1: b5d3531acaa6a7215899662bb6c1d1d549d834d2 Metadata: Tag='GDDD' Index=0 Length=33 bytes CYLS:490,HEADS:4,SECS:32,BPS:512. CHDMan addmeta [v0.146] D:\>chdman-0.146 addmeta -i "a29a02.chd" -t IDNT -ix 0 -vf "a29a02 [-t IDNT -ix 0]" chdman - MAME Compressed Hunks of Data (CHD) manager 0.146 (May 21 2012) Input file: a29a02.chd Tag: IDNT Index: 0 Data: a29a02 [-t IDNT -ix 0] (512 bytes) Metadata added CHDMan info [v0.146] D:\>chdman-0.146 info -i "a29a02.chd" chdman - MAME Compressed Hunks of Data (CHD) manager 0.146 (May 21 2012) Input file: a29a02.chd File Version: 5 Logical size: 32,112,640 bytes Hunk Size: 4,096 bytes Total Hunks: 7,840 Unit Size: 512 bytes Total Units: 62,720 Compression: lzma (LZMA), zlib (Deflate), huff (Huffman), flac (FLAC) CHD size: 16,153,925 bytes Ratio: 50.3% SHA1: 00afad399737652b3e17257c70a19f62e37f3c97 Data SHA1: b5d3531acaa6a7215899662bb6c1d1d549d834d2 Metadata: Tag='GDDD' Index=0 Length=33 bytes CYLS:490,HEADS:4,SECS:32,BPS:512. Metadata: Tag='IDNT' Index=0 Length=512 bytes ..........@. ....... 1145710G06D42314......AH D.231aSDnsi
Additional Information	1.) Comparing the original CHD with the CHD I used delmeta on through a hex editor, there is only one byte difference. 2.) Comparing the original CHD with the CHD I used addmeta on through a hex editor, a few bytes has changed in the header. The new meta data is now appended at the end of the file. This causes the CHD file to increase in size. Is this suppose to happen? 3.) This bug may be related to the "copy" command bug that appeared in one of the "U" releases awhile back.
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