| // +build !plan9 |
| |
| /* |
| Plan 9 from User Space src/lib9/open.c |
| http://code.swtch.com/plan9port/src/tip/src/lib9/open.c |
| |
| Copyright 2001-2007 Russ Cox. All Rights Reserved. |
| |
| Permission is hereby granted, free of charge, to any person obtaining a copy |
| of this software and associated documentation files (the "Software"), to deal |
| in the Software without restriction, including without limitation the rights |
| to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| copies of the Software, and to permit persons to whom the Software is |
| furnished to do so, subject to the following conditions: |
| |
| The above copyright notice and this permission notice shall be included in |
| all copies or substantial portions of the Software. |
| |
| THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| THE SOFTWARE. |
| */ |
| |
| #define _GNU_SOURCE /* for Linux O_DIRECT */ |
| #include <u.h> |
| #define NOPLAN9DEFINES |
| #include <sys/file.h> |
| #include <libc.h> |
| #ifndef O_DIRECT |
| #define O_DIRECT 0 |
| #endif |
| |
| int |
| p9open(char *name, int mode) |
| { |
| int rclose; |
| int fd, umode, rdwr; |
| |
| rdwr = mode&3; |
| umode = rdwr; |
| rclose = mode&ORCLOSE; |
| mode &= ~(3|ORCLOSE); |
| if(mode&OTRUNC){ |
| umode |= O_TRUNC; |
| mode ^= OTRUNC; |
| } |
| if(mode&ODIRECT){ |
| umode |= O_DIRECT; |
| mode ^= ODIRECT; |
| } |
| if(mode&OAPPEND){ |
| umode |= O_APPEND; |
| mode ^= OAPPEND; |
| } |
| if(mode){ |
| werrstr("mode 0x%x not supported", mode); |
| return -1; |
| } |
| umode |= O_BINARY; |
| fd = open(name, umode); |
| if(fd >= 0){ |
| if(rclose) |
| remove(name); |
| } |
| return fd; |
| } |