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 c71af67a 2005-01-07 devnull 	struct flock fl;
16 b3994ec5 2003-12-11 devnull 
17 d9e16d25 2004-06-11 devnull 	rdwr = mode&3;
18 d9e16d25 2004-06-11 devnull 	umode = rdwr;
19 b3994ec5 2003-12-11 devnull 	cexec = mode&OCEXEC;
20 b3994ec5 2003-12-11 devnull 	rclose = mode&ORCLOSE;
21 e7504005 2004-06-11 devnull 	lock = mode&OLOCK;
22 e7504005 2004-06-11 devnull 	mode &= ~(3|OCEXEC|ORCLOSE|OLOCK);
23 b3994ec5 2003-12-11 devnull 	if(mode&OTRUNC){
24 b3994ec5 2003-12-11 devnull 		umode |= O_TRUNC;
25 b3994ec5 2003-12-11 devnull 		mode ^= OTRUNC;
26 b3994ec5 2003-12-11 devnull 	}
27 be36ff68 2004-04-29 devnull 	if(mode&ODIRECT){
28 be36ff68 2004-04-29 devnull 		umode |= O_DIRECT;
29 be36ff68 2004-04-29 devnull 		mode ^= ODIRECT;
30 be36ff68 2004-04-29 devnull 	}
31 a19ff5b2 2005-01-07 devnull 	if(mode&ONONBLOCK){
32 a19ff5b2 2005-01-07 devnull 		umode |= O_NONBLOCK;
33 a19ff5b2 2005-01-07 devnull 		mode ^= ONONBLOCK;
34 a19ff5b2 2005-01-07 devnull 	}
35 b3994ec5 2003-12-11 devnull 	if(mode){
36 debcecb5 2004-05-14 devnull 		werrstr("mode 0x%x not supported", mode);
37 b3994ec5 2003-12-11 devnull 		return -1;
38 b3994ec5 2003-12-11 devnull 	}
39 b3994ec5 2003-12-11 devnull 	fd = open(name, umode);
40 b3994ec5 2003-12-11 devnull 	if(fd >= 0){
41 e7504005 2004-06-11 devnull 		if(lock){
42 c71af67a 2005-01-07 devnull 			fl.l_type = (rdwr==OREAD) ? F_RDLCK : F_WRLCK;
43 c71af67a 2005-01-07 devnull 			fl.l_whence = SEEK_SET;
44 c71af67a 2005-01-07 devnull 			fl.l_start = 0;
45 c71af67a 2005-01-07 devnull 			fl.l_len = 0;
46 c71af67a 2005-01-07 devnull 			if(fcntl(fd, F_SETLK, &fl) < 0){
47 e7504005 2004-06-11 devnull 				close(fd);
48 e7504005 2004-06-11 devnull 				return -1;
49 e7504005 2004-06-11 devnull 			}
50 e7504005 2004-06-11 devnull 		}
51 b3994ec5 2003-12-11 devnull 		if(cexec)
52 b3994ec5 2003-12-11 devnull 			fcntl(fd, F_SETFL, FD_CLOEXEC);
53 b3994ec5 2003-12-11 devnull 		if(rclose)
54 b3994ec5 2003-12-11 devnull 			remove(name);
55 b3994ec5 2003-12-11 devnull 	}
56 b3994ec5 2003-12-11 devnull 	return fd;
57 b3994ec5 2003-12-11 devnull }