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Annotation of embedaddon/hping2/memunlock.c, revision 1.1

1.1     ! misho       1: /*
        !             2:  * $smu-mark$
        !             3:  * $name: memunlock.c$
        !             4:  * $other_author: Alfonso De Gregorio <dira@speedcom.it>
        !             5:  * $other_copyright: Copyright (C) 1999 by Alfonso De Gregorio
        !             6:  * $license: This software is under GPL version 2 of license$
        !             7:  * $date: Fri Nov  5 11:55:48 MET 1999$
        !             8:  * $rev: 2$
        !             9:  */
        !            10: 
        !            11: #include <unistd.h>
        !            12: #include <sys/mman.h>
        !            13: 
        !            14: int memunlock(char *addr, size_t size)
        !            15: {
        !            16: #ifdef _POSIX_MEMLOCK_RANGE
        !            17:        unsigned long    page_offset, page_size;
        !            18: 
        !            19:        page_size = sysconf(_SC_PAGESIZE);
        !            20:        page_offset = (unsigned long) addr % page_size;
        !            21: 
        !            22:        addr -= page_offset; 
        !            23:        size += page_offset;
        !            24: 
        !            25:        return ( munlock(addr, size) ); 
        !            26: #endif
        !            27:        return (-1);
        !            28: }