39 lines
2.5 KiB
C
39 lines
2.5 KiB
C
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/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ This program is free software; you can redistribute it and/or modify │
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│ it under the terms of the GNU General Public License as published by │
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│ the Free Software Foundation; version 2 of the License. │
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│ │
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│ This program is distributed in the hope that it will be useful, but │
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│ WITHOUT ANY WARRANTY; without even the implied warranty of │
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│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
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│ General Public License for more details. │
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│ │
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│ You should have received a copy of the GNU General Public License │
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│ along with this program; if not, write to the Free Software │
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│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
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│ 02110-1301 USA │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/calls/internal.h"
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#include "libc/nt/enum/filemovemethod.h"
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#include "libc/nt/files.h"
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#include "libc/sysv/errfuns.h"
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textwindows int ftruncate$nt(int fd, uint64_t length) {
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bool32 ok;
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int64_t tell;
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if (!isfdkind(fd, kFdFile)) return ebadf();
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tell = -1;
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if (SetFilePointerEx(g_fds.p[fd].handle, 0, &tell, kNtFileCurrent)) {
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ok = SetFilePointerEx(g_fds.p[fd].handle, length, NULL, kNtFileBegin) &&
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SetEndOfFile(g_fds.p[fd].handle);
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SetFilePointerEx(g_fds.p[fd].handle, tell, NULL, kNtFileBegin);
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return ok ? 0 : winerr();
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} else {
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return winerr();
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}
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}
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