Mercurial > dovecot > core-2.2

annotate src/lib/write-full.c @ 29:e9375147c0cb HEAD

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Added write_full() which is a simple wrapper around write() meant for writing into files. When there's too much deleted data in index files, they're now compressed when the index is being opened.
author Timo Sirainen <tss@iki.fi>
date Mon, 26 Aug 2002 02:46:59 +0300
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children b1d05f79758f
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1 /*
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2 write-full.c - Simpler API to write to file
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3
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4 Copyright (c) 2002 Timo Sirainen
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5
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6 Permission is hereby granted, free of charge, to any person obtaining
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7 a copy of this software and associated documentation files (the
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8 "Software"), to deal in the Software without restriction, including
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9 without limitation the rights to use, copy, modify, merge, publish,
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10 distribute, sublicense, and/or sell copies of the Software, and to
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11 permit persons to whom the Software is furnished to do so, subject to
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12 the following conditions:
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13
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14 The above copyright notice and this permission notice shall be
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15 included in all copies or substantial portions of the Software.
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16
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17 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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18 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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19 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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20 IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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21 CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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22 TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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23 SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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24 */
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25
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26 #include <errno.h>
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27 #include <limits.h>
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28 #include <unistd.h>
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30 int write_full(int fd, const void *data, size_t size)
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31 {
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32 ssize_t ret;
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33
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34 do {
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35 ret = write(fd, data, size < INT_MAX ? size : INT_MAX);
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36 if (ret < 0)
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37 return -1;
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38
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39 if (ret == 0) {
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40 /* nothing was written, only reason for this should
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41 be out of disk space */
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42 errno = ENOSPC;
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43 return -1;
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44 }
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45 size -= ret;
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46 } while (size > 0);
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47
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48 return 0;
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49 }