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When I trimmed the spurious free()s for the new lower-allocation
path strategy, I forgot to look for cases where I was relying on
the allocation, such as realpath(path, NULL).
Signed-off-by: Peter Seebach <peter.seebach@windriver.com>
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Instead of allocating (and then freeing) these paths all the time,
use a rotating selection of buffers of fixed but probably large enough
size (the same size that would have been the maximum anyway in
general). With the exception of fts_open, there's no likely way to
end up needing more than two or three such paths at a time. fts_open
dups the paths since it could have a large number and need them for
a while. This dramatically reduces (in principle) the amount of allocation
and especially reallocation going on.
Signed-off-by: Peter Seebach <peter.seebach@windriver.com>
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This is a spiffied-up rebase of a bunch of intermediate changes, presented
as a whole because it is, surprisingly, less confusing that way. The basic
idea is to separate the guts code into categories ranging from generic
stuff that can be the same everywhere and specific variants. The big scary
one is the Darwin support, which actually seems to run okay on 64-bit OS X
10.6. (No other variants were tested.) The other example given is support
for the old clone() syscall on RHEL 4, which affects some wrlinux use cases.
There's a few minor cleanup bits here, such as a function with inconsistent
calling conventions, but nothing really exciting.
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Peter Seebach