46 lines
2.5 KiB
C
46 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=8 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/stdio/stdio.h"
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#include "libc/calls/calls.h"
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#include "libc/sysv/consts/o.h"
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/**
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* Turns stdio flags description string into bitmask.
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*/
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int fopenflags(const char *mode) {
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unsigned flags = 0;
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do {
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if (*mode == 'r') {
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flags |= O_RDONLY;
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} else if (*mode == 'w') {
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flags |= O_WRONLY | O_CREAT | O_TRUNC;
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} else if (*mode == 'a') {
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flags |= O_WRONLY | O_CREAT | O_APPEND;
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} else if (*mode == '+') {
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flags |= O_RDWR;
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} else if (*mode == 'x') {
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flags |= O_EXCL;
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} else if (*mode == 'e') {
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flags |= O_CLOEXEC;
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}
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} while (*mode++);
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return flags;
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}
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