Public bug reported:
I have a Linux file with data originally from a resource fork, I want to
copy the data to a HFS disk image, creating an HFS file with only a
resource fork.
`macstream` purports to create MacBinary streams, -r is used to specify
that the input is a bare resource fork. However:
hmount macdisk.dsk # HFS floppy image file, destination for hcopy
export f=InputFile
export tmp=`mktmp TMPRESOURCE.XXX`
macstream -l -r "${f}" >> "${tmp}"
hcopy -m "${tmp}" :FileWithResourceFork
reports
hcopy: "TMPRESOURCE.bd2": unknown, unsupported, or corrupt MacBinary
file (Invalid argument)
The desired outcome is that macstream produce a macbinary file
acceptable to hcopy.
It appears that hcopy (see hfsutils/copyin.c cpi_macb() function)
# hfsutils/copyin.c Line 491
crc = d_getuw(&buf[124]);
if (crc_macb(buf, 124, 0x0000) != crc)
{
/* (buf[82] == 0) => MacBinary I? */
ERROR(EINVAL, "unknown, unsupported, or corrupt MacBinary file");
close(ifile);
return -1;
}
expects a 16-bit CRC value, at offset 124, to match the CRC computed over the
first 124 bytes of the
header. This seems to match the "MacBinary II" standard (but not the MacBinary
I standard)
https://files.stairways.com/other/macbinaryii-standard-info.txt states
*Offset 122-Byte, Version number of Macbinary II that the uploading program
is written for (the version begins at 129)
*Offset 123-Byte, Minimum MacBinary II version needed to read this file
(start this value at 129 129)
*Offset 124-Word, CRC of previous 124 bytes
which matches the hcopy expectation, but not what macstream does.
I guess the feature request is that macstream compute the CRC as
expected by MacBinary II (perhaps under a command-line flag), instead of
leaving this field to be zero.
I can attempt to write a patch
** Affects: macutils (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/2139010
Title:
macutils macstream produces MacBinary files without a CRC, hfsutil
hcopy demands a CRC
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