plucky (2) munmap.2freebsd.gz

Provided by: freebsd-manpages_12.2-2_all bug

NAME
     munmap — remove a mapping


LIBRARY
     Standard C Library (libc, -lc)


SYNOPSIS
     #include <sys/mman.h>

     int
     munmap(void *addr, size_t len);


DESCRIPTION
     The munmap() system call deletes the mappings and guards for the specified address range, and causes
     further references to addresses within the range to generate invalid memory references.


RETURN VALUES
     The munmap() function returns the value 0 if successful; otherwise the value -1 is returned and the global
     variable errno is set to indicate the error.


ERRORS
     The munmap() system call will fail if:

     [EINVAL]           The addr argument was not page aligned, the len argument was zero or negative, or some
                        part of the region being unmapped is outside the valid address range for a process.


SEE ALSO
     madvise(2), mincore(2), mmap(2), mprotect(2), msync(2), getpagesize(3)


HISTORY
     The munmap() system call first appeared in 4.4BSD.