DragonFly On-Line Manual Pages

MUNMAP(2)                DragonFly System Calls Manual               MUNMAP(2)

NAME
     munmap -- remove a mapping

LIBRARY
     Standard C Library (libc, -lc)

SYNOPSIS
     #include <sys/types.h>
     #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
     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
     Munmap() will fail if:

     [EINVAL]           The addr parameter was not page aligned, the len
                        parameter was 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() function first appeared in 4.4BSD.

DragonFly 3.5                    May 27, 1994                    DragonFly 3.5