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MUNMAP(2) BSD System Calls Manual MUNMAP(2) NAME munmap -- remove a mapping SYNOPSIS #include <sys/mman.h> int munmap(void *addr, size_t len); DESCRIPTION The munmap() system call deletes the mappings for the specified address range, causing further references to addresses within the range to gener-ate generate ate invalid memory references. RETURN VALUES Upon successful completion, munmap returns zero. Otherwise, a value of -1 is returned and errno is set to indicate the error. ERRORS Munmap() will fail if: [EINVAL] The addr parameter was not page aligned (i.e., a mul-tiple multiple tiple of the page size). [EINVAL] The len parameter was negative or zero. [EINVAL] Some part of the region being unmapped is not part of the currently valid address space. LEGACY SYNOPSIS #include <sys/types.h> #include <sys/mman.h> The include file <sys/types.h> is necessary. int munmap(caddr_t addr, size_t len); The type of addr has changed. SEE ALSO getpagesize(3), msync(2), munmap(2), mprotect(2), madvise(2), mincore(2), compat(5) HISTORY The munmap() function first appeared in 4.4BSD. BSD April 15, 1994 BSD |