1 be36ff68 2004-04-29 devnull #define _GNU_SOURCE	/* for Linux O_DIRECT */
 2 fd04aace 2003-11-23 devnull #include <u.h>
 3 32f69c36 2003-12-11 devnull #define NOPLAN9DEFINES
 4 e7504005 2004-06-11 devnull #include <sys/file.h>
 5 fd04aace 2003-11-23 devnull #include <libc.h>
 6 32f69c36 2003-12-11 devnull #include <sys/stat.h>
 7 983990c8 2004-05-14 devnull #ifndef O_DIRECT
 8 983990c8 2004-05-14 devnull #define O_DIRECT 0
 9 983990c8 2004-05-14 devnull #endif
10 fd04aace 2003-11-23 devnull 
11 fd04aace 2003-11-23 devnull int
12 8ad51794 2004-03-25 devnull p9create(char *path, int mode, ulong perm)
13 fd04aace 2003-11-23 devnull {
14 d9e16d25 2004-06-11 devnull 	int fd, cexec, umode, rclose, lock, rdwr;
15 32f69c36 2003-12-11 devnull 
16 d9e16d25 2004-06-11 devnull 	rdwr = mode&3;
17 e7504005 2004-06-11 devnull 	lock = mode&OLOCK;
18 32f69c36 2003-12-11 devnull 	cexec = mode&OCEXEC;
19 32f69c36 2003-12-11 devnull 	rclose = mode&ORCLOSE;
20 e7504005 2004-06-11 devnull 	mode &= ~(ORCLOSE|OCEXEC|OLOCK);
21 32f69c36 2003-12-11 devnull 
22 32f69c36 2003-12-11 devnull 	/* XXX should get mode mask right? */
23 32f69c36 2003-12-11 devnull 	fd = -1;
24 32f69c36 2003-12-11 devnull 	if(perm&DMDIR){
25 32f69c36 2003-12-11 devnull 		if(mode != OREAD){
26 32f69c36 2003-12-11 devnull 			werrstr("bad mode in directory create");
27 32f69c36 2003-12-11 devnull 			goto out;
28 32f69c36 2003-12-11 devnull 		}
29 32f69c36 2003-12-11 devnull 		if(mkdir(path, perm&0777) < 0)
30 32f69c36 2003-12-11 devnull 			goto out;
31 32f69c36 2003-12-11 devnull 		fd = open(path, O_RDONLY);
32 32f69c36 2003-12-11 devnull 	}else{
33 32f69c36 2003-12-11 devnull 		umode = (mode&3)|O_CREAT|O_TRUNC;
34 32f69c36 2003-12-11 devnull 		mode &= ~(3|OTRUNC);
35 be36ff68 2004-04-29 devnull 		if(mode&ODIRECT){
36 be36ff68 2004-04-29 devnull 			umode |= O_DIRECT;
37 be36ff68 2004-04-29 devnull 			mode &= ~ODIRECT;
38 be36ff68 2004-04-29 devnull 		}
39 32f69c36 2003-12-11 devnull 		if(mode&OEXCL){
40 32f69c36 2003-12-11 devnull 			umode |= O_EXCL;
41 32f69c36 2003-12-11 devnull 			mode &= ~OEXCL;
42 32f69c36 2003-12-11 devnull 		}
43 32f69c36 2003-12-11 devnull 		if(mode){
44 32f69c36 2003-12-11 devnull 			werrstr("unsupported mode in create");
45 32f69c36 2003-12-11 devnull 			goto out;
46 32f69c36 2003-12-11 devnull 		}
47 32f69c36 2003-12-11 devnull 		fd = open(path, umode, perm);
48 32f69c36 2003-12-11 devnull 	}
49 32f69c36 2003-12-11 devnull out:
50 32f69c36 2003-12-11 devnull 	if(fd >= 0){
51 e7504005 2004-06-11 devnull 		if(lock){
52 d9e16d25 2004-06-11 devnull 			if(flock(fd, (rdwr==OREAD) ? LOCK_SH : LOCK_EX) < 0){
53 e7504005 2004-06-11 devnull 				close(fd);
54 e7504005 2004-06-11 devnull 				return -1;
55 e7504005 2004-06-11 devnull 			}
56 e7504005 2004-06-11 devnull 		}
57 32f69c36 2003-12-11 devnull 		if(cexec)
58 32f69c36 2003-12-11 devnull 			fcntl(fd, F_SETFL, FD_CLOEXEC);
59 32f69c36 2003-12-11 devnull 		if(rclose)
60 32f69c36 2003-12-11 devnull 			remove(path);
61 32f69c36 2003-12-11 devnull 	}
62 32f69c36 2003-12-11 devnull 	return fd;
63 fd04aace 2003-11-23 devnull }