view src/lib/mmap-util.c @ 9191:b340ecb24469 HEAD

Fix VPATH build of RQUOTA support. Some rpcgen derive #include "..." paths from the infile argument. This will be off for VPATH builds, as the generated rquota_xdr.c code will look in $(srcdir), but we'll generate the rquota.h file in $(builddir). Play safe and copy rquota.x to $(builddir) first. This fixes the build on openSUSE 11.1.
author Matthias Andree <>
date Tue, 07 Jul 2009 21:01:36 +0200
parents b9faf4db2a9f
children 00cd9aacd03c
line wrap: on
line source

/* Copyright (c) 2002-2009 Dovecot authors, see the included COPYING file */

#include "lib.h"
#include "mmap-util.h"

#include <sys/stat.h>

void *mmap_file(int fd, size_t *length, int prot)
	struct stat st;

	if (fstat(fd, &st) < 0)
		return MAP_FAILED;

	if (st.st_size > SSIZE_T_MAX) {
		/* too large file to map into memory */
		errno = EFBIG;
		return MAP_FAILED;

	*length = (size_t)st.st_size;
	if (*length == 0)
		return NULL;

	i_assert(*length > 0 && *length < SSIZE_T_MAX);

	return mmap(NULL, *length, prot, MAP_SHARED, fd, 0);

void *mmap_ro_file(int fd, size_t *length)
	return mmap_file(fd, length, PROT_READ);

void *mmap_rw_file(int fd, size_t *length)
	return mmap_file(fd, length, PROT_READ | PROT_WRITE);

int my_madvise(void *start ATTR_UNUSED, size_t length ATTR_UNUSED,
	       int advice ATTR_UNUSED)
	return 0;

size_t mmap_get_page_size(void)
	static size_t size = 0;

	if (size != 0)
		return size;
	size = getpagesize();
	return size;