1 be36ff68 2004-04-29 devnull #define _GNU_SOURCE	/* for Linux O_DIRECT */
 2 b3994ec5 2003-12-11 devnull #include <u.h>
 3 b3994ec5 2003-12-11 devnull #define NOPLAN9DEFINES
 4 e7504005 2004-06-11 devnull #include <sys/file.h>
 5 b3994ec5 2003-12-11 devnull #include <libc.h>
 6 983990c8 2004-05-14 devnull #ifndef O_DIRECT
 7 983990c8 2004-05-14 devnull #define O_DIRECT 0
 8 983990c8 2004-05-14 devnull #endif
 9 b3994ec5 2003-12-11 devnull 
10 b3994ec5 2003-12-11 devnull int
11 8ad51794 2004-03-25 devnull p9open(char *name, int mode)
12 b3994ec5 2003-12-11 devnull {
13 b3994ec5 2003-12-11 devnull 	int cexec, rclose;
14 d9e16d25 2004-06-11 devnull 	int fd, umode, lock, rdwr;
15 b3994ec5 2003-12-11 devnull 
16 d9e16d25 2004-06-11 devnull 	rdwr = mode&3;
17 d9e16d25 2004-06-11 devnull 	umode = rdwr;
18 b3994ec5 2003-12-11 devnull 	cexec = mode&OCEXEC;
19 b3994ec5 2003-12-11 devnull 	rclose = mode&ORCLOSE;
20 e7504005 2004-06-11 devnull 	lock = mode&OLOCK;
21 e7504005 2004-06-11 devnull 	mode &= ~(3|OCEXEC|ORCLOSE|OLOCK);
22 b3994ec5 2003-12-11 devnull 	if(mode&OTRUNC){
23 b3994ec5 2003-12-11 devnull 		umode |= O_TRUNC;
24 b3994ec5 2003-12-11 devnull 		mode ^= OTRUNC;
25 b3994ec5 2003-12-11 devnull 	}
26 be36ff68 2004-04-29 devnull 	if(mode&ODIRECT){
27 be36ff68 2004-04-29 devnull 		umode |= O_DIRECT;
28 be36ff68 2004-04-29 devnull 		mode ^= ODIRECT;
29 be36ff68 2004-04-29 devnull 	}
30 b3994ec5 2003-12-11 devnull 	if(mode){
31 debcecb5 2004-05-14 devnull 		werrstr("mode 0x%x not supported", mode);
32 b3994ec5 2003-12-11 devnull 		return -1;
33 b3994ec5 2003-12-11 devnull 	}
34 b3994ec5 2003-12-11 devnull 	fd = open(name, umode);
35 b3994ec5 2003-12-11 devnull 	if(fd >= 0){
36 e7504005 2004-06-11 devnull 		if(lock){
37 d9e16d25 2004-06-11 devnull 			if(flock(fd, (rdwr==OREAD) ? LOCK_SH : LOCK_EX) < 0){
38 e7504005 2004-06-11 devnull 				close(fd);
39 e7504005 2004-06-11 devnull 				return -1;
40 e7504005 2004-06-11 devnull 			}
41 e7504005 2004-06-11 devnull 		}
42 b3994ec5 2003-12-11 devnull 		if(cexec)
43 b3994ec5 2003-12-11 devnull 			fcntl(fd, F_SETFL, FD_CLOEXEC);
44 b3994ec5 2003-12-11 devnull 		if(rclose)
45 b3994ec5 2003-12-11 devnull 			remove(name);
46 b3994ec5 2003-12-11 devnull 	}
47 b3994ec5 2003-12-11 devnull 	return fd;
48 b3994ec5 2003-12-11 devnull }