More files related to user-level file servers.
Also add acme!
diff --git a/src/lib9/post9p.c b/src/lib9/post9p.c
new file mode 100644
index 0000000..35ba316
--- /dev/null
+++ b/src/lib9/post9p.c
@@ -0,0 +1,40 @@
+#include <u.h>
+#include <libc.h>
+
+int
+post9pservice(int fd, char *name)
+{
+ int i;
+ char *ns, *s;
+ Waitmsg *w;
+
+ if((ns = getns()) == nil)
+ return -1;
+ s = smprint("unix!%s/%s", ns, name);
+ free(ns);
+ if(s == nil)
+ return -1;
+ switch(rfork(RFPROC|RFFDG)){
+ case -1:
+ return -1;
+ case 0:
+ dup(fd, 0);
+ dup(fd, 1);
+ for(i=3; i<20; i++)
+ close(i);
+ execlp("9pserve", "9pserve", "-u", s, (char*)0);
+ fprint(2, "exec 9pserve: %r\n");
+ _exits("exec");
+ default:
+ w = wait();
+ close(fd);
+ free(s);
+ if(w->msg && w->msg[0]){
+ free(w);
+ werrstr("9pserve failed");
+ return -1;
+ }
+ free(w);
+ return 0;
+ }
+}
