1 #include <u.h>
2 #include <signal.h>
3 #include <libc.h>
4 #include "term.h"
5 
6 int
7 rcstart(int argc, char **argv, int *pfd, int *tfd)
8 {
9 	int fd[2], i, pid;
10 	char *xargv[3];
11 	char slave[256];
12 	int sfd;
13 
14 	if(argc == 0){
15 		argc = 2;
16 		argv = xargv;
17 		argv[0] = getenv("SHELL");
18 		if(argv[0] == 0)
19 			argv[0] = "rc";
20 		argv[1] = "-i";
21 		argv[2] = 0;
22 	}
23 	/*
24 	 * fd0 is slave (tty), fd1 is master (pty)
25 	 */
26 	fd[0] = fd[1] = -1;
27 	if(getpts(fd, slave) < 0)
28 		sysfatal("getpts: %r\n");
29 	switch(pid = fork()) {
30 	case 0:
31 		putenv("TERM", "9term");
32 		sfd = childpty(fd, slave);
33 		dup(sfd, 0);
34 		dup(sfd, 1);
35 		dup(sfd, 2);
36 		system("stty tabs -onlcr onocr icanon echo erase '^h' intr '^?'");
37 		if(noecho)
38 			system("stty -echo");
39 		for(i=3; i<100; i++)
40 			close(i);
41 		execvp(argv[0], argv);
42 		fprint(2, "exec %s failed: %r\n", argv[0]);
43 		_exits("oops");
44 		break;
45 	case -1:
46 		sysfatal("proc failed: %r");
47 		break;
48 	}
49 	*pfd = fd[1];
50 	close(fd[0]);
51 	if(tfd){
52 		if((*tfd = open(slave, OREAD)) < 0)
53 			sysfatal("parent open %s: %r", slave);
54 	}
55 	return pid;
56 }
57