bcb4e51a409d94ae670de96afb8483a4f7855294Stephan Bosch/* Copyright (c) 2003-2018 Dovecot authors, see the included COPYING file */
0cb2e8eb55e70f8ebe1e8349bdf49e4cbe5d8834Timo Sirainen
0cb2e8eb55e70f8ebe1e8349bdf49e4cbe5d8834Timo Sirainen#include "lib.h"
0cb2e8eb55e70f8ebe1e8349bdf49e4cbe5d8834Timo Sirainen#include "read-full.h"
0cb2e8eb55e70f8ebe1e8349bdf49e4cbe5d8834Timo Sirainen
0cb2e8eb55e70f8ebe1e8349bdf49e4cbe5d8834Timo Sirainen#include <unistd.h>
0cb2e8eb55e70f8ebe1e8349bdf49e4cbe5d8834Timo Sirainen
0cb2e8eb55e70f8ebe1e8349bdf49e4cbe5d8834Timo Sirainenint read_full(int fd, void *data, size_t size)
0cb2e8eb55e70f8ebe1e8349bdf49e4cbe5d8834Timo Sirainen{
0cb2e8eb55e70f8ebe1e8349bdf49e4cbe5d8834Timo Sirainen ssize_t ret;
0cb2e8eb55e70f8ebe1e8349bdf49e4cbe5d8834Timo Sirainen
0cb2e8eb55e70f8ebe1e8349bdf49e4cbe5d8834Timo Sirainen while (size > 0) {
0cb2e8eb55e70f8ebe1e8349bdf49e4cbe5d8834Timo Sirainen ret = read(fd, data, size < SSIZE_T_MAX ? size : SSIZE_T_MAX);
0cb2e8eb55e70f8ebe1e8349bdf49e4cbe5d8834Timo Sirainen if (ret <= 0)
0cb2e8eb55e70f8ebe1e8349bdf49e4cbe5d8834Timo Sirainen return ret;
0cb2e8eb55e70f8ebe1e8349bdf49e4cbe5d8834Timo Sirainen
2d566ba9c304ffa14cd1f8f39e1d9fd432be9db5Timo Sirainen data = PTR_OFFSET(data, ret);
0cb2e8eb55e70f8ebe1e8349bdf49e4cbe5d8834Timo Sirainen size -= ret;
0cb2e8eb55e70f8ebe1e8349bdf49e4cbe5d8834Timo Sirainen }
0cb2e8eb55e70f8ebe1e8349bdf49e4cbe5d8834Timo Sirainen
0cb2e8eb55e70f8ebe1e8349bdf49e4cbe5d8834Timo Sirainen return 1;
0cb2e8eb55e70f8ebe1e8349bdf49e4cbe5d8834Timo Sirainen}
0cb2e8eb55e70f8ebe1e8349bdf49e4cbe5d8834Timo Sirainen
0cb2e8eb55e70f8ebe1e8349bdf49e4cbe5d8834Timo Sirainenint pread_full(int fd, void *data, size_t size, off_t offset)
0cb2e8eb55e70f8ebe1e8349bdf49e4cbe5d8834Timo Sirainen{
0cb2e8eb55e70f8ebe1e8349bdf49e4cbe5d8834Timo Sirainen ssize_t ret;
0cb2e8eb55e70f8ebe1e8349bdf49e4cbe5d8834Timo Sirainen
0cb2e8eb55e70f8ebe1e8349bdf49e4cbe5d8834Timo Sirainen while (size > 0) {
0cb2e8eb55e70f8ebe1e8349bdf49e4cbe5d8834Timo Sirainen ret = pread(fd, data, size < SSIZE_T_MAX ?
0cb2e8eb55e70f8ebe1e8349bdf49e4cbe5d8834Timo Sirainen size : SSIZE_T_MAX, offset);
0cb2e8eb55e70f8ebe1e8349bdf49e4cbe5d8834Timo Sirainen if (ret <= 0)
0cb2e8eb55e70f8ebe1e8349bdf49e4cbe5d8834Timo Sirainen return ret;
0cb2e8eb55e70f8ebe1e8349bdf49e4cbe5d8834Timo Sirainen
2d566ba9c304ffa14cd1f8f39e1d9fd432be9db5Timo Sirainen data = PTR_OFFSET(data, ret);
0cb2e8eb55e70f8ebe1e8349bdf49e4cbe5d8834Timo Sirainen size -= ret;
0cb2e8eb55e70f8ebe1e8349bdf49e4cbe5d8834Timo Sirainen offset += ret;
0cb2e8eb55e70f8ebe1e8349bdf49e4cbe5d8834Timo Sirainen }
0cb2e8eb55e70f8ebe1e8349bdf49e4cbe5d8834Timo Sirainen
0cb2e8eb55e70f8ebe1e8349bdf49e4cbe5d8834Timo Sirainen return 1;
0cb2e8eb55e70f8ebe1e8349bdf49e4cbe5d8834Timo Sirainen}