NAME
munmap —
remove a mapping
LIBRARY
library “libc”
SYNOPSIS
#include
<sys/mman.h>
int
munmap(void
*addr, size_t
len);
DESCRIPTION
Themunmap()
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, munmap returns
zero. Otherwise, a value of -1 is returned and errno
is set to indicate the error.
ERRORS
munmap() will fail if:
- [
EINVAL] - The addr parameter was not page aligned, or some part of the region being unmapped is outside the valid address range for a process.
SEE ALSO
madvise(2), mincore(2), mlock(2), mmap(2), mprotect(2), msync(2), getpagesize(3)
STANDARDS
The munmap() function conforms to
IEEE Std 1003.1b-1993
(“POSIX.1b”).
HISTORY
The munmap() function first appeared in
4.4BSD.