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munmap (2)
  • >> munmap (2) ( Solaris man: Системные вызовы )
  • munmap (2) ( FreeBSD man: Системные вызовы )
  • munmap (2) ( Русские man: Системные вызовы )
  • munmap (2) ( Linux man: Системные вызовы )
  • munmap (3) ( POSIX man: Библиотечные вызовы )
  •  

    NAME

    munmap - unmap pages of memory
     
    

    SYNOPSIS

    #include <sys/mman.h>
    
    int munmap(void *addr, size_t len);
    

     

    DESCRIPTION

    The munmap() function removes the mappings for pages in the range [addr, addr + len), rounding the len argument up to the next multiple of the page size as returned by sysconf(3C). If addr is not the address of a mapping established by a prior call to mmap(2), the behavior is undefined. After a successful call to munmap() and before any subsequent mapping of the unmapped pages, further references to these pages will result in the delivery of a SIGBUS or SIGSEGV signal to the process.

    The mmap(2) function often performs an implicit munmap().  

    RETURN VALUES

    Upon successful completion, munmap() returns 0; otherwise, it returns -1 and sets errno to indicate an error.  

    ERRORS

    The munmap() function will fail if:

    EINVAL

    The addr argument is not a multiple of the page size as returned by sysconf(3C); addresses in the range [addr, addr + len) are outside the valid range for the address space of a process; or the len argument has a value less than or equal to 0.

     

    ATTRIBUTES

    See attributes(5) for descriptions of the following attributes:

    ATTRIBUTE TYPEATTRIBUTE VALUE

    Interface StabilityStandard

     

    SEE ALSO

    mmap(2), sysconf(3C), attributes(5), standards(5)


     

    Index

    NAME
    SYNOPSIS
    DESCRIPTION
    RETURN VALUES
    ERRORS
    ATTRIBUTES
    SEE ALSO


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