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
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.