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Diffstat (limited to 'gnu/usr.bin/grep/getpagesize.h')
-rw-r--r-- | gnu/usr.bin/grep/getpagesize.h | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/gnu/usr.bin/grep/getpagesize.h b/gnu/usr.bin/grep/getpagesize.h new file mode 100644 index 0000000..e6bd561 --- /dev/null +++ b/gnu/usr.bin/grep/getpagesize.h @@ -0,0 +1,42 @@ +#ifdef BSD +#ifndef BSD4_1 +#define HAVE_GETPAGESIZE +#endif +#endif + +#ifndef HAVE_GETPAGESIZE + +#ifdef VMS +#define getpagesize() 512 +#endif + +#ifdef HAVE_UNISTD_H +#include <unistd.h> +#endif + +#ifdef _SC_PAGESIZE +#define getpagesize() sysconf(_SC_PAGESIZE) +#else + +#ifdef HAVE_SYS_PARAM_H +#include <sys/param.h> + +#ifdef EXEC_PAGESIZE +#define getpagesize() EXEC_PAGESIZE +#else +#ifdef NBPG +#define getpagesize() NBPG * CLSIZE +#ifndef CLSIZE +#define CLSIZE 1 +#endif /* no CLSIZE */ +#else /* no NBPG */ +#define getpagesize() NBPC +#endif /* no NBPG */ +#endif /* no EXEC_PAGESIZE */ +#else /* !HAVE_SYS_PARAM_H */ +#define getpagesize() 8192 /* punt totally */ +#endif /* !HAVE_SYS_PARAM_H */ +#endif /* no _SC_PAGESIZE */ + +#endif /* not HAVE_GETPAGESIZE */ + |