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#include <u.h>
#include <signal.h>
#include <libc.h>
#include "term.h"
static void
sys(char *buf, int devnull)
{
char buf2[100];
char *f[20];
int nf, pid;
notedisable("sys: child");
strcpy(buf2, buf);
nf = tokenize(buf2, f, nelem(f));
f[nf] = nil;
switch(pid = fork()){
case 0:
close(1);
open("/dev/null", OREAD);
close(2);
open("/dev/null", OREAD);
execvp(f[0], f);
_exit(2);
default:
waitpid();
}
}
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){
exit(3);
sysfatal("getpts: %r\n");
}
/*
* notedisable("sys: window size change");
*
* Can't disable because will be inherited by other programs
* like if you run an xterm from the prompt, and then xterm's
* resizes won't get handled right. Sigh.
*
* Can't not disable because when we stty below we'll get a
* signal, which will drop us into the thread library note handler,
* which will get all confused because we just forked and thus
* have an unknown pid.
*
* So disable it internally. ARGH!
*/
notifyoff("sys: window size change");
pid = fork();
switch(pid){
case 0:
putenv("TERM", "9term");
sfd = childpty(fd, slave);
dup(sfd, 0);
dup(sfd, 1);
dup(sfd, 2);
sys("stty tabs -onlcr icanon echo erase '^h' intr '^?'", 0);
sys("stty onocr", 1); /* not available on mac */
if(noecho)
sys("stty -echo", 0);
for(i=3; i<100; i++)
close(i);
signal(SIGINT, SIG_DFL);
signal(SIGHUP, SIG_DFL);
signal(SIGTERM, SIG_DFL);
execvp(argv[0], argv);
fprint(2, "exec %s failed: %r\n", argv[0]);
_exit(2);
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;
}
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