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