static int
bin_clone(char *nam, char **args, UNUSED(Options ops), UNUSED(int func))
{
int ttyfd, pid, cttyfd;
unmetafy(*args, NULL);
ttyfd = open(*args, O_RDWR|O_NOCTTY);
if (ttyfd < 0) {
zwarnnam(nam, "%s: %e", *args, errno);
return 1;
}
pid = fork();
if (!pid) {
clearjobtab(0);
ppid = getppid();
mypid = getpid();
#ifdef HAVE_SETSID
if (setsid() != mypid)
zwarnnam(nam, "failed to create new session: %e", NULL, errno);
#elif defined(TIOCNOTTY)
if (ioctl(SHTTY, TIOCNOTTY, 0))
zwarnnam(*args, "%e", NULL, errno);
setpgrp(0L, mypid);
#endif
dup2(ttyfd,0);
dup2(ttyfd,1);
dup2(ttyfd,2);
if (ttyfd > 2)
close(ttyfd);
closem(0);
close(coprocin);
close(coprocout);
/* Acquire a controlling terminal */
cttyfd = open(*args, O_RDWR);
if (cttyfd == -1)
zwarnnam(nam, "%e", NULL, errno);
else {
#ifdef TIOCSCTTY
ioctl(cttyfd, TIOCSCTTY, 0);
#endif
close(cttyfd);
}
/* check if we acquired the tty successfully */
cttyfd = open("/dev/tty", O_RDWR);
if (cttyfd == -1)
zwarnnam(nam, "could not make %s my controlling tty, job control "
"disabled", *args, 0);
else
close(cttyfd);
/* Clear mygrp so that acquire_pgrp() gets the new process group.
* (acquire_pgrp() is called from init_io()) */
mypgrp = 0;
init_io();
setsparam("TTY", ztrdup(ttystrname));
}
close(ttyfd);
if (pid < 0) {
zerrnam(nam, "fork failed: %e", NULL, errno);
return 1;
}
lastpid = pid;
return 0;
}
static int
newptycmd(char *nam, char *pname, char **args, int echo, int nblock)
{
Ptycmd p;
int master, slave, pid, oineval = ineval, ret;
char *oscriptname = scriptname, syncch;
Eprog prog;
/* code borrowed from bin_eval() */
ineval = !isset(EVALLINENO);
if (!ineval)
scriptname = "(zpty)";
prog = parse_string(zjoin(args, ' ', 1), 0);
if (!prog) {
errflag &= ~ERRFLAG_ERROR;
scriptname = oscriptname;
ineval = oineval;
return 1;
}
if (get_pty(1, &master)) {
zwarnnam(nam, "can't open pseudo terminal: %e", errno);
scriptname = oscriptname;
ineval = oineval;
return 1;
}
if ((pid = fork()) == -1) {
zwarnnam(nam, "can't create pty command %s: %e", pname, errno);
close(master);
scriptname = oscriptname;
ineval = oineval;
return 1;
} else if (!pid) {
/* This code copied from the clone module, except for getting *
* the descriptor from get_pty() and duplicating it to 0/1/2. */
deletehookfunc("exit", ptyhook);
clearjobtab(0);
ppid = getppid();
mypid = getpid();
#ifdef HAVE_SETSID
if (setsid() != mypid) {
zwarnnam(nam, "failed to create new session: %e", errno);
#endif
#ifdef TIOCNOTTY
if (ioctl(SHTTY, TIOCNOTTY, 0))
zwarnnam(nam, "%e", errno);
setpgrp(0L, mypid);
#endif
#ifdef HAVE_SETSID
}
#endif
if (get_pty(0, &slave))
exit(1);
SHTTY = slave;
attachtty(mypid);
#ifdef TIOCGWINSZ
/* Set the window size before associating with the terminal *
* so that we don't get hit with a SIGWINCH. I'm paranoid. */
if (interact) {
struct ttyinfo info;
if (ioctl(slave, TIOCGWINSZ, (char *) &info.winsize) == 0) {
info.winsize.ws_row = zterm_lines;
info.winsize.ws_col = zterm_columns;
ioctl(slave, TIOCSWINSZ, (char *) &info.winsize);
}
}
#endif /* TIOCGWINSZ */
if (!echo) {
struct ttyinfo info;
if (!ptygettyinfo(slave, &info)) {
#ifdef HAVE_TERMIOS_H
info.tio.c_lflag &= ~ECHO;
#else
#ifdef HAVE_TERMIO_H
info.tio.c_lflag &= ~ECHO;
#else
info.tio.lmodes &= ~ECHO; /**** dunno if this is right */
#endif
#endif
ptysettyinfo(slave, &info);
}
}
#ifdef TIOCSCTTY
ioctl(slave, TIOCSCTTY, 0);
#endif
close(0);
close(1);
close(2);
dup2(slave, 0);
dup2(slave, 1);
dup2(slave, 2);
closem(FDT_UNUSED, 0);
close(slave);
close(master);
close(coprocin);
close(coprocout);
init_io(NULL);
setsparam("TTY", ztrdup(ttystrname));
opts[INTERACTIVE] = 0;
syncch = 0;
do {
ret = write(1, &syncch, 1);
} while (ret != 1 && (
#ifdef EWOULDBLOCK
errno == EWOULDBLOCK ||
#else
#ifdef EAGAIN
errno == EAGAIN ||
#endif
#endif
errno == EINTR));
execode(prog, 1, 0, "zpty");
stopmsg = 2;
mypid = 0; /* trick to ensure we _exit() */
zexit(lastval, 0);
}
master = movefd(master);
if (master == -1) {
zerrnam(nam, "cannot duplicate fd %d: %e", master, errno);
scriptname = oscriptname;
ineval = oineval;
return 1;
}
p = (Ptycmd) zalloc(sizeof(*p));
p->name = ztrdup(pname);
p->args = zarrdup(args);
p->fd = master;
p->pid = pid;
p->echo = echo;
p->nblock = nblock;
p->fin = 0;
p->read = -1;
p->old = NULL;
p->olen = 0;
p->next = ptycmds;
ptycmds = p;
if (nblock)
ptynonblock(master);
scriptname = oscriptname;
ineval = oineval;
do {
ret = read(master, &syncch, 1);
} while (ret != 1 && (
#ifdef EWOULDBLOCK
errno == EWOULDBLOCK ||
#else
#ifdef EAGAIN
errno == EAGAIN ||
#endif
#endif
errno == EINTR));
setiparam_no_convert("REPLY", (zlong)master);
return 0;
}
