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

Remove a mapping.

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
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munmap(2freebsd) referred by
refer to madvise(2) | mincore(2) | mmap(2) | mprotect(2) | msync(2)