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Mail Archives: cygwin/2009/10/07/23:04:49

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Date: Wed, 07 Oct 2009 21:04:15 -0600
From: Eric Blake <ebb9 AT byu DOT net>
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To: cygwin AT cygwin DOT com
Subject: fd leak in utimensat
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Hash: SHA1

I haven't spent time trying to locate where the leak is happening, but
process explorer confirms that this STC leaves a handle open to the file,
preventing further re-creation of a new file by the same name.

#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <string.h>
#include <sys/stat.h>
#include <unistd.h>
int
main (int argc, char **argv)
{
  struct timespec ts[2] = { { 0, 1000000000 }, { 0, 0 } };
  close (creat (argv[1], 0600));
  int i = utimensat (AT_FDCWD, argv[1], ts, 0);
  printf ("%d %d %s\n", i, errno, strerror (errno));
  unlink (argv[1]);
  i = creat (argv[1], 0600);
  printf ("%d %d %s\n", i, errno, strerror (errno));
  unlink (argv[1]);
  return 0;
}

- --
Don't work too hard, make some time for fun as well!

Eric Blake             ebb9 AT byu DOT net
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