[ANNOUNCE, DISCUSS] xfsprogs: libxfs-4.1-update branch created

[Eric Sandeen]

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One interesting problem that arises from this is in xfs_format.h:

/* On-disk XFS extended attribute names */
#define SGI_ACL_FILE            (char *)"SGI_ACL_FILE"
#define SGI_ACL_DEFAULT         (char *)"SGI_ACL_DEFAULT"
#define SGI_ACL_FILE_SIZE       (sizeof(SGI_ACL_FILE)-1)
#define SGI_ACL_DEFAULT_SIZE    (sizeof(SGI_ACL_DEFAULT)-1)

(aside: why is it unsigned in the kernel but not here?)

Anyway: that "sizeof" gives us 7, because it's getting the 
size of the pointer, not the string literal.  Cool eh!
Never mattered in the kernel, because the _SIZE macros aren't
used.

I'm not actually sure what the cleanest way to fix this is;
casting string literals gets way past my comfort level with 
C pedantry; technically if we want an array of unsigned chars,
we probably need:

unsigned char *SGI_ACL_FILE[] = "SGI_ACL_FILE";
unsigned char *SGI_ACL_DEFAULT[] = "SGI_ACL_DEFAULT";

but then it can't live in the format header; in kernelspace we need that
symbol in xfs_acl.c, in userspace we need it in repair/attr_repair.c 

- -Eric
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