post9p.c - 9base - revived minimalist port of Plan 9 userland to Unix
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post9p.c (1523B)
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1 #include <u.h>
2 #include <libc.h>
3
4 int chattyfuse;
5
6 int
7 post9pservice(int fd, char *name, char *mtpt)
8 {
9 int i, pid;
10 char *ns, *addr;
11 Waitmsg *w;
12
13 if(name == nil && mtpt == nil){
14 close(fd);
15 werrstr("nothing to do");
16 return -1;
17 }
18
19 if(name){
20 if(strchr(name, '!')) /* assume is already network address */
21 addr = strdup(name);
22 else{
23 if((ns = getns()) == nil)
24 return -1;
25 addr = smprint("unix!%s/%s", ns, name);
26 free(ns);
27 }
28 if(addr == nil)
29 return -1;
30 switch(pid = fork()){
31 case -1:
32 return -1;
33 case 0:
34 dup(fd, 0);
35 dup(fd, 1);
36 for(i=3; i<20; i++)
37 close(i);
38 execlp("9pserve", "9pserve", "-u", addr, (char*)0);
39 fprint(2, "exec 9pserve: %r\n");
40 _exits("exec");
41 }
42 close(fd);
43 w = waitfor(pid);
44 if(w == nil)
45 return -1;
46 if(w->msg && w->msg[0]){
47 free(w);
48 werrstr("9pserve failed");
49 return -1;
50 }
51 free(w);
52 if(mtpt){
53 /* reopen */
54 if((fd = dial(addr, nil, nil, nil)) < 0){
55 werrstr("cannot reopen for mount: %r");
56 return -1;
57 }
58 }
59 free(addr);
60 }
61 if(mtpt){
62 switch(pid = rfork(RFFDG|RFPROC|RFNOWAIT)){
63 case -1:
64 return -1;
65 case 0:
66 dup(fd, 0);
67 for(i=3; i<20; i++)
68 close(i);
69
70 /* Try v9fs on Linux, which will mount 9P directly. */
71 execlp("mount9p", "mount9p", "-", mtpt, (char*)0);
72
73 if(chattyfuse)
74 execlp("9pfuse", "9pfuse", "-D", "-", mtpt, (char*)0);
75 else
76 execlp("9pfuse", "9pfuse", "-", mtpt, (char*)0);
77 fprint(2, "exec 9pfuse: %r\n");
78 _exits("exec");
79 }
80 close(fd);
81 }
82 return 0;
83 }