/*
* v_screen_copy --
* Copy vi screen.
*
* PUBLIC: int v_screen_copy(SCR *, SCR *);
*/
int
v_screen_copy(SCR *orig, SCR *sp)
{
VI_PRIVATE *ovip, *nvip;
/* Create the private vi structure. */
CALLOC_RET(orig, nvip, 1, sizeof(VI_PRIVATE));
sp->vi_private = nvip;
/* Invalidate the line size cache. */
VI_SCR_CFLUSH(nvip);
if (orig == NULL) {
nvip->csearchdir = CNOTSET;
} else {
ovip = VIP(orig);
/* User can replay the last input, but nothing else. */
if (ovip->rep_len != 0) {
MALLOC_RET(orig, nvip->rep, ovip->rep_len);
memmove(nvip->rep, ovip->rep, ovip->rep_len);
nvip->rep_len = ovip->rep_len;
}
/* Copy the match characters information. */
if (ovip->mcs != NULL && (nvip->mcs =
v_wstrdup(sp, ovip->mcs, STRLEN(ovip->mcs))) == NULL)
return (1);
/* Copy the paragraph/section information. */
if (ovip->ps != NULL && (nvip->ps =
v_strdup(sp, ovip->ps, strlen(ovip->ps))) == NULL)
return (1);
nvip->lastckey = ovip->lastckey;
nvip->csearchdir = ovip->csearchdir;
nvip->srows = ovip->srows;
}
return (0);
}
/*
* sscr_init --
* Create a pty setup for a shell.
*/
static int
sscr_init(SCR *sp)
{
SCRIPT *sc;
char *sh, *sh_path;
/* We're going to need a shell. */
if (opts_empty(sp, O_SHELL, 0))
return (1);
MALLOC_RET(sp, sc, sizeof(SCRIPT));
sp->script = sc;
sc->sh_prompt = NULL;
sc->sh_prompt_len = 0;
/*
* There are two different processes running through this code.
* They are the shell and the parent.
*/
sc->sh_master = sc->sh_slave = -1;
if (tcgetattr(STDIN_FILENO, &sc->sh_term) == -1) {
msgq(sp, M_SYSERR, "tcgetattr");
goto err;
}
/*
* Turn off output postprocessing and echo.
*/
sc->sh_term.c_oflag &= ~OPOST;
sc->sh_term.c_cflag &= ~(ECHO|ECHOE|ECHONL|ECHOK);
if (ioctl(STDIN_FILENO, TIOCGWINSZ, &sc->sh_win) == -1) {
msgq(sp, M_SYSERR, "tcgetattr");
goto err;
}
if (openpty(&sc->sh_master,
&sc->sh_slave, sc->sh_name, &sc->sh_term, &sc->sh_win) == -1) {
msgq(sp, M_SYSERR, "pty");
goto err;
}
/*
* __TK__ huh?
* Don't use vfork() here, because the signal semantics differ from
* implementation to implementation.
*/
switch (sc->sh_pid = fork()) {
case -1: /* Error. */
msgq(sp, M_SYSERR, "fork");
err: if (sc->sh_master != -1)
(void)close(sc->sh_master);
if (sc->sh_slave != -1)
(void)close(sc->sh_slave);
return (1);
case 0: /* Utility. */
/*
* XXX
* So that shells that do command line editing turn it off.
*/
if (setenv("TERM", "emacs", 1) == -1 ||
setenv("TERMCAP", "emacs:", 1) == -1 ||
setenv("EMACS", "t", 1) == -1)
_exit(126);
(void)setsid();
/*
* 4.4BSD allocates a controlling terminal using the TIOCSCTTY
* ioctl, not by opening a terminal device file. POSIX 1003.1
* doesn't define a portable way to do this.
*/
(void)ioctl(sc->sh_slave, TIOCSCTTY, 0);
(void)close(sc->sh_master);
(void)dup2(sc->sh_slave, STDIN_FILENO);
(void)dup2(sc->sh_slave, STDOUT_FILENO);
(void)dup2(sc->sh_slave, STDERR_FILENO);
(void)close(sc->sh_slave);
/* Assumes that all shells have -i. */
sh_path = O_STR(sp, O_SHELL);
if ((sh = strrchr(sh_path, '/')) == NULL)
sh = sh_path;
else
++sh;
execl(sh_path, sh, "-i", (char *)NULL);
msgq_str(sp, M_SYSERR, sh_path, "execl: %s");
_exit(127);
default: /* Parent. */
break;
}
if (sscr_getprompt(sp))
return (1);
F_SET(sp, SC_SCRIPT);
F_SET(sp->gp, G_SCRWIN);
return (0);
}
