1 #include <u.h>
2 #include <sys/socket.h>
3 #include <sys/un.h>
4 #include <ctype.h>
5 #include <pwd.h>
6 #include <libc.h>
7 #include <auth.h>
8 #include <fcall.h>
9 #include <authsrv.h>
10 #include <libsec.h>
11 #include "drawterm.h"
12
13 #undef socket
14 #undef connect
15 #undef getenv
16 #undef access
17
18 char*
getuser(void)19 getuser(void)
20 {
21 static char user[64];
22 struct passwd *pw;
23
24 pw = getpwuid(getuid());
25 if(pw == nil)
26 return "none";
27 strecpy(user, user+sizeof user, pw->pw_name);
28 return user;
29 }
30 /*
31 * Absent other hints, it works reasonably well to use
32 * the X11 display name as the name space identifier.
33 * This is how sam's B has worked since the early days.
34 * Since most programs using name spaces are also using X,
35 * this still seems reasonable. Terminal-only sessions
36 * can set $NAMESPACE.
37 */
38 static char*
nsfromdisplay(void)39 nsfromdisplay(void)
40 {
41 char *disp, *p;
42
43 if((disp = getenv("DISPLAY")) == nil){
44 werrstr("$DISPLAY not set");
45 return nil;
46 }
47
48 /* canonicalize: xxx:0.0 => xxx:0 */
49 p = strrchr(disp, ':');
50 if(p){
51 p++;
52 while(isdigit((uchar)*p))
53 p++;
54 if(strcmp(p, ".0") == 0)
55 *p = 0;
56 }
57
58 return smprint("/tmp/ns.%s.%s", getuser(), disp);
59 }
60
61 char*
getns(void)62 getns(void)
63 {
64 char *ns;
65
66 ns = getenv("NAMESPACE");
67 if(ns == nil)
68 ns = nsfromdisplay();
69 if(ns == nil){
70 werrstr("$NAMESPACE not set, %r");
71 return nil;
72 }
73 return ns;
74 }
75
76 int
dialfactotum(void)77 dialfactotum(void)
78 {
79 int fd;
80 struct sockaddr_un su;
81 char *name;
82
83 name = smprint("%s/factotum", getns());
84
85 if(name == nil || access(name, 0) < 0)
86 return -1;
87 memset(&su, 0, sizeof su);
88 su.sun_family = AF_UNIX;
89 if(strlen(name)+1 > sizeof su.sun_path){
90 werrstr("socket name too long");
91 return -1;
92 }
93 strcpy(su.sun_path, name);
94 if((fd = socket(AF_UNIX, SOCK_STREAM, 0)) < 0){
95 werrstr("socket: %r");
96 return -1;
97 }
98 if(connect(fd, (struct sockaddr*)&su, sizeof su) < 0){
99 werrstr("connect %s: %r", name);
100 close(fd);
101 return -1;
102 }
103
104 return lfdfd(fd);
105 }
106
107