imapext-2007
annotate src/osdep/unix/truncate.c @ 0:ada5e610ab86
imap-2007e
author | yuuji@gentei.org |
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date | Mon, 14 Sep 2009 15:17:45 +0900 |
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children |
rev | line source |
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yuuji@0 | 1 /* ======================================================================== |
yuuji@0 | 2 * Copyright 1988-2006 University of Washington |
yuuji@0 | 3 * |
yuuji@0 | 4 * Licensed under the Apache License, Version 2.0 (the "License"); |
yuuji@0 | 5 * you may not use this file except in compliance with the License. |
yuuji@0 | 6 * You may obtain a copy of the License at |
yuuji@0 | 7 * |
yuuji@0 | 8 * http://www.apache.org/licenses/LICENSE-2.0 |
yuuji@0 | 9 * |
yuuji@0 | 10 * |
yuuji@0 | 11 * ======================================================================== |
yuuji@0 | 12 */ |
yuuji@0 | 13 |
yuuji@0 | 14 /* |
yuuji@0 | 15 * Program: Truncate a file |
yuuji@0 | 16 * |
yuuji@0 | 17 * Author: Mark Crispin |
yuuji@0 | 18 * Networks and Distributed Computing |
yuuji@0 | 19 * Computing & Communications |
yuuji@0 | 20 * University of Washington |
yuuji@0 | 21 * Administration Building, AG-44 |
yuuji@0 | 22 * Seattle, WA 98195 |
yuuji@0 | 23 * Internet: MRC@CAC.Washington.EDU |
yuuji@0 | 24 * |
yuuji@0 | 25 * Date: 30 June 1994 |
yuuji@0 | 26 * Last Edited: 30 August 2006 |
yuuji@0 | 27 */ |
yuuji@0 | 28 |
yuuji@0 | 29 /* Emulator for ftruncate() call |
yuuji@0 | 30 * Accepts: file descriptor |
yuuji@0 | 31 * length |
yuuji@0 | 32 * Returns: 0 if success, -1 if failure |
yuuji@0 | 33 */ |
yuuji@0 | 34 |
yuuji@0 | 35 int ftruncate (int fd,off_t length) |
yuuji@0 | 36 { |
yuuji@0 | 37 struct flock fb; |
yuuji@0 | 38 fb.l_whence = 0; |
yuuji@0 | 39 fb.l_len = 0; |
yuuji@0 | 40 fb.l_start = length; |
yuuji@0 | 41 fb.l_type = F_WRLCK; /* write lock on file space */ |
yuuji@0 | 42 return fcntl (fd,F_FREESP,&fb); |
yuuji@0 | 43 } |