Updated: 2022/Sep/29
Please read Privacy Policy. It's for your privacy.
MUNMAP(2) 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 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. NetBSD 9.99 May 27, 1994 NetBSD 9.99