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MUNMAP(2) FreeBSD 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, and causes further references to addresses within the range to generate invalid memory references. RETURN VALUES Upon successful completion, the value 0 is returned; otherwise the value -1 is returned and the global variable errno is set to indicate the error. ERRORS munmap() will fail if: [EINVAL] The addr and len parameters specify a region that would extend beyond the end of the address space, or some part of the region being unmapped is not part of the currently valid address space. SEE ALSO madvise(2), mlock(2), mlockall(2), mmap(2), mprotect(2), msync(2), getpagesize(3) STANDARDS When len is non-zero, the munmap() function conforms to IEEE Std 1003.1-2008 ("POSIX.1"). HISTORY The munmap() system call has been available since 4.3BSD Net/2. CAVEATS IEEE Std 1003.1-2008 ("POSIX.1") specifies that munmap() shall fail with EINVAL if len is 0. OpenBSD performs no action in this case. FreeBSD 13.0 December 21, 2019 FreeBSD 13.0
NAME | SYNOPSIS | DESCRIPTION | RETURN VALUES | ERRORS | SEE ALSO | STANDARDS | HISTORY | CAVEATS
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