108 lines
1.8 KiB
C
108 lines
1.8 KiB
C
#include <u.h>
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#include <sys/socket.h>
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#include <sys/un.h>
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#include <pwd.h>
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#include <libc.h>
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#include <auth.h>
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#include <fcall.h>
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#include <authsrv.h>
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#include <libsec.h>
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#include "drawterm.h"
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#undef socket
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#undef connect
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#undef getenv
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#undef access
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char*
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getuser(void)
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{
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static char user[64];
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struct passwd *pw;
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pw = getpwuid(getuid());
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if(pw == nil)
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return "none";
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strecpy(user, user+sizeof user, pw->pw_name);
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return user;
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}
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/*
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* Absent other hints, it works reasonably well to use
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* the X11 display name as the name space identifier.
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* This is how sam's B has worked since the early days.
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* Since most programs using name spaces are also using X,
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* this still seems reasonable. Terminal-only sessions
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* can set $NAMESPACE.
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*/
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static char*
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nsfromdisplay(void)
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{
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int fd;
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Dir *d;
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char *disp, *p;
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if((disp = getenv("DISPLAY")) == nil){
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werrstr("$DISPLAY not set");
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return nil;
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}
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/* canonicalize: xxx:0.0 => xxx:0 */
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p = strrchr(disp, ':');
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if(p){
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p++;
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while(isdigit((uchar)*p))
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p++;
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if(strcmp(p, ".0") == 0)
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*p = 0;
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}
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return smprint("/tmp/ns.%s.%s", getuser(), disp);
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}
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char*
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getns(void)
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{
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char *ns;
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ns = getenv("NAMESPACE");
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if(ns == nil)
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ns = nsfromdisplay();
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if(ns == nil){
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werrstr("$NAMESPACE not set, %r");
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return nil;
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}
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return ns;
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}
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int
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dialfactotum(void)
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{
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int fd;
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struct sockaddr_un su;
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char *name;
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name = smprint("%s/factotum", getns());
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if(name == nil || access(name, 0) < 0)
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return -1;
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memset(&su, 0, sizeof su);
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su.sun_family = AF_UNIX;
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if(strlen(name)+1 > sizeof su.sun_path){
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werrstr("socket name too long");
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return -1;
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}
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strcpy(su.sun_path, name);
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if((fd = socket(AF_UNIX, SOCK_STREAM, 0)) < 0){
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werrstr("socket: %r");
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return -1;
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}
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if(connect(fd, (struct sockaddr*)&su, sizeof su) < 0){
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werrstr("connect %s: %r", name);
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close(fd);
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return -1;
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}
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return lfdfd(fd);
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}
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