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