opnsense-src/gnu/usr.bin/grep/getpagesize.h

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/* Emulate getpagesize on systems that lack it. */
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/* $FreeBSD$ */
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#ifndef HAVE_GETPAGESIZE
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#ifdef HAVE_UNISTD_H
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# include <unistd.h>
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#endif
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#if !defined getpagesize && defined _SC_PAGESIZE
# if !(defined VMS && __VMS_VER < 70000000)
# define getpagesize() sysconf (_SC_PAGESIZE)
# endif
#endif
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#if !defined getpagesize && defined VMS
# ifdef __ALPHA
# define getpagesize() 8192
# else
# define getpagesize() 512
# endif
#endif
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#ifndef getpagesize
# include <sys/param.h>
# ifdef EXEC_PAGESIZE
# define getpagesize() EXEC_PAGESIZE
# else
# ifdef NBPG
# ifndef CLSIZE
# define CLSIZE 1
# endif
# define getpagesize() (NBPG * CLSIZE)
# else
# ifdef NBPC
# define getpagesize() NBPC
# endif
# endif
# endif
#endif
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#endif /* not HAVE_GETPAGESIZE */