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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <signal.h>
#ifdef HAVE_UNISTD_H
# ifdef __GLIBC__
# undef __USE_XOPEN /* Needed to avoid old glibc using __block */
# endif
# include <unistd.h>
# ifdef __GLIBC__
# define __USE_XOPEN 1
# endif
#endif
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