Add support for user-level 9P servers/clients and various bug fixes to go with them.

1 files changed, 48 insertions, 2 deletions

diff --git a/src/lib9/create.c b/src/lib9/create.c
index abef0c35..bdad5f6a 100644
--- a/src/lib9/create.c
+++ b/src/lib9/create.c
@@ -1,8 +1,54 @@
 #include <u.h>
+#define NOPLAN9DEFINES
 #include <libc.h>
+#include <sys/stat.h>
+
+extern char *_p9translate(char*);
 
 int
-create(char *path, int mode, ulong perm)
+p9create(char *xpath, int mode, ulong perm)
 {
-	return open(path, mode|O_CREAT|O_TRUNC, perm);
+	int fd, cexec, umode, rclose;
+	char *path;
+
+	if((path = _p9translate(xpath)) == nil)
+		return -1;
+
+	cexec = mode&OCEXEC;
+	rclose = mode&ORCLOSE;
+	mode &= ~(ORCLOSE|OCEXEC);
+
+	/* XXX should get mode mask right? */
+	fd = -1;
+	if(perm&DMDIR){
+		if(mode != OREAD){
+			werrstr("bad mode in directory create");
+			goto out;
+		}
+		if(mkdir(path, perm&0777) < 0)
+			goto out;
+		fd = open(path, O_RDONLY);
+	}else{
+		umode = (mode&3)|O_CREAT|O_TRUNC;
+		mode &= ~(3|OTRUNC);
+		if(mode&OEXCL){
+			umode |= O_EXCL;
+			mode &= ~OEXCL;
+		}
+		if(mode){
+			werrstr("unsupported mode in create");
+			goto out;
+		}
+		fd = open(path, umode, perm);
+	}
+out:
+	if(fd >= 0){
+		if(cexec)
+			fcntl(fd, F_SETFL, FD_CLOEXEC);
+		if(rclose)
+			remove(path);
+	}
+	if(path != xpath)
+		free(path);
+	return fd;
 }