NAME
munmap —
remove a mapping
LIBRARY
library “libc”
SYNOPSIS
#include
<sys/types.h>
#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
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.