Re: mmap problem in localedef

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Hi,

On Mon, Dec 05, 2016 at 01:36:17PM +0200, Meelis Roos wrote:
> I noticed that locale-gen fails to work on my gentoo. Before reporting 
> to getnoo I tried to understand whether there is something specific to 
> parisc and here is the relevant part of strace from localedef 
> invocation:
> 
> 1761  open("//usr/lib/locale/locale-archive.yvHI9a", O_RDWR|O_CREAT|O_EXCL, 0600) = 3
> 1761  write(3, "\336\2\1\t\0\0\0\0\0\0\0008\0\0\0\0\0\0\3\213\0\0*\274\0\0\0\0\0\0\35L"..., 56) = 56
> 1761  ftruncate64(3, 103860)            = 0
> 1761  mmap2(NULL, 536870912, PROT_NONE, MAP_SHARED, 3, 0) = 0xd79bd000
> 1761  mmap2(0xd7c00000, 103860, PROT_READ|PROT_WRITE, MAP_SHARED|MAP_FIXED, 3, 0) = -1 EINVAL (Invalid argument)
> 1761  unlink("//usr/lib/locale/locale-archive.yvHI9a") = 0
> 1761  write(2, "cannot map archive header", 25) = 25
> 1761  write(2, ": Invalid argument", 18) = 18
> 1761  write(2, "\n", 1)                 = 1
> 1761  exit_group(1)                     = ?
> 
> Do I read it correctly that it creates PROT_NONE mapping on file opened 
> O_RDWR, then tries to create a PROT_READ|PROT_WRITE mapping from the 
> same file at fixed location and fails?
> 
> Why should it fail - because the fixed location is not suitable?

This is known longstanding issue: https://sourceware.org/bugzilla/show_bug.cgi?id=19838

A.
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