/etc/magic entry for GIF files?
Matthew Stier - Sun Visualization Products
matthew at sunpix.east.sun.com
Thu Oct 25 05:59:24 AEST 1990
In article <2725be7d.55aa at uop.uop.edu> nsayer at uop.edu (Nick Sayer) writes:
>What I REALLY want is:
>
>0 string GIF GIF image
>>3 string xxx (version %s)
>
>but that doesn't work, obviously. Any ideas?
>
To quote the man page:
For string values, the byte string from the file
must match the specified byte string; the byte
string from the file which is matched is the same
length as the specified byte string.
In other words, your 'ideal' /etc/magic' entry is looking for the character
string 'xxx'. To fix this problem, one would have to change 'file(1)' to
have some wildcard pattern for strings. I get around the problem with these
lines:
0 string GIF GIF image
>3 string 87a (version 87a)
>3 string 89a (version 89a)
These are the only two version numbers currently authorized by Compuserve.
--
Matthew Lee Stier (mstier at east.Sun.COM) |
Sun Microsystems --- RTP, NC 27709-3447 | "Wisconsin Escapee"
uucp: sun!mstier or mcnc!rti!sunpix!matthew |
phone: (919) 469-8300 fax: (919) 460-8355 |
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