SIMPLE SOLUTIONS

MUNMAP(2FREEBSD) - man page online | system calls

Remove a mapping.

Chapter
May 27, 1994
MUNMAP(2)                            BSD System Calls Manual                            MUNMAP(2)

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 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 neg‐ ative, 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.
BSD May 27, 1994 BSD
This manual Reference Other manuals
munmap(2freebsd) referred by
refer to madvise(2) | mincore(2) | mmap(2) | mprotect(2) | msync(2)