mirror of
https://github.com/golang/go
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174b8c95f5
This change depends on CL 57170052. LGTM=rsc R=rsc, bradfitz CC=golang-codereviews https://golang.org/cl/60840049
86 lines
2.2 KiB
C
86 lines
2.2 KiB
C
// +build !plan9
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/*
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Plan 9 from User Space src/lib9/create.c
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http://code.swtch.com/plan9port/src/tip/src/lib9/create.c
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Copyright 2001-2007 Russ Cox. All Rights Reserved.
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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*/
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#define _GNU_SOURCE /* for Linux O_DIRECT */
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#include <u.h>
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#define NOPLAN9DEFINES
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#include <sys/file.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <libc.h>
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#include <sys/stat.h>
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#ifndef O_DIRECT
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#define O_DIRECT 0
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#endif
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int
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p9create(char *path, int mode, ulong perm)
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{
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int fd, umode, rclose;
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rclose = mode&ORCLOSE;
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mode &= ~ORCLOSE;
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/* XXX should get mode mask right? */
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fd = -1;
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if(perm&DMDIR){
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if(mode != OREAD){
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werrstr("bad mode in directory create");
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goto out;
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}
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if(mkdir(path, perm&0777) < 0)
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goto out;
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fd = open(path, O_RDONLY);
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}else{
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umode = (mode&3)|O_CREAT|O_TRUNC;
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mode &= ~(3|OTRUNC);
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if(mode&ODIRECT){
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umode |= O_DIRECT;
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mode &= ~ODIRECT;
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}
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if(mode&OEXCL){
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umode |= O_EXCL;
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mode &= ~OEXCL;
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}
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if(mode&OAPPEND){
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umode |= O_APPEND;
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mode &= ~OAPPEND;
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}
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if(mode){
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werrstr("unsupported mode in create");
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goto out;
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}
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umode |= O_BINARY;
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fd = open(path, umode, perm);
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}
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out:
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if(fd >= 0){
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if(rclose)
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remove(path);
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}
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return fd;
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}
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