mod_export int
dosetopt(int optno, int value, int force, char *new_opts)
{
if(!optno)
return -1;
if(optno < 0) {
optno = -optno;
value = !value;
}
if (optno == RESTRICTED) {
if (isset(RESTRICTED))
return value ? 0 : -1;
if (value) {
char **s;
for (s = rparams; *s; s++)
restrictparam(*s);
}
} else if(!force && optno == EXECOPT && !value && interact) {
/* cannot set noexec when interactive */
return -1;
} else if(!force && (optno == INTERACTIVE || optno == SHINSTDIN ||
optno == SINGLECOMMAND)) {
if (new_opts[optno] == value)
return 0;
/* it is not permitted to change the value of these options */
return -1;
} else if(!force && optno == USEZLE && value) {
/* we require a terminal in order to use ZLE */
if(!interact || SHTTY == -1 || !shout)
return -1;
} else if(optno == PRIVILEGED && !value) {
/* unsetting PRIVILEGED causes the shell to make itself unprivileged */
#ifdef HAVE_SETUID
setuid(getuid());
setgid(getgid());
if (setuid(getuid())) {
zwarn("failed to change user ID: %e", errno);
return -1;
} else if (setgid(getgid())) {
zwarn("failed to change group ID: %e", errno);
return -1;
}
#else
zwarn("setuid not available");
return -1;
#endif /* not HAVE_SETUID */
#ifdef JOB_CONTROL
} else if (!force && optno == MONITOR && value) {
if (new_opts[optno] == value)
return 0;
if (SHTTY != -1) {
origpgrp = GETPGRP();
acquire_pgrp();
} else
return -1;
#else
} else if(optno == MONITOR && value) {
return -1;
#endif /* not JOB_CONTROL */
#ifdef GETPWNAM_FAKED
} else if(optno == CDABLEVARS && value) {
return -1;
#endif /* GETPWNAM_FAKED */
} else if ((optno == EMACSMODE || optno == VIMODE) && value) {
if (sticky && sticky->emulation)
return -1;
zleentry(ZLE_CMD_SET_KEYMAP, optno);
new_opts[(optno == EMACSMODE) ? VIMODE : EMACSMODE] = 0;
} else if (optno == SUNKEYBOARDHACK) {
/* for backward compatibility */
keyboardhackchar = (value ? '`' : '\0');
}
new_opts[optno] = value;
if (optno == BANGHIST || optno == SHINSTDIN)
inittyptab();
return 0;
}
void
init_io(void)
{
long ttpgrp;
static char outbuf[BUFSIZ], errbuf[BUFSIZ];
#ifdef RSH_BUG_WORKAROUND
int i;
#endif
/* stdout, stderr fully buffered */
#ifdef _IOFBF
setvbuf(stdout, outbuf, _IOFBF, BUFSIZ);
setvbuf(stderr, errbuf, _IOFBF, BUFSIZ);
#else
setbuffer(stdout, outbuf, BUFSIZ);
setbuffer(stderr, errbuf, BUFSIZ);
#endif
/* This works around a bug in some versions of in.rshd. *
* Currently this is not defined by default. */
#ifdef RSH_BUG_WORKAROUND
if (cmd) {
for (i = 3; i < 10; i++)
close(i);
}
#endif
if (shout) {
fclose(shout);
shout = 0;
}
if (SHTTY != -1) {
zclose(SHTTY);
SHTTY = -1;
}
/* Make sure the tty is opened read/write. */
if (isatty(0)) {
zsfree(ttystrname);
if ((ttystrname = ztrdup(ttyname(0))))
SHTTY = movefd(open(ttystrname, O_RDWR));
}
if (SHTTY == -1 && (SHTTY = movefd(open("/dev/tty", O_RDWR))) != -1) {
zsfree(ttystrname);
ttystrname = ztrdup("/dev/tty");
}
if (SHTTY == -1) {
zsfree(ttystrname);
ttystrname = ztrdup("");
}
/* We will only use zle if shell is interactive, *
* SHTTY != -1, and shout != 0 */
if (interact && SHTTY != -1) {
init_shout();
if(!shout)
opts[USEZLE] = 0;
} else
opts[USEZLE] = 0;
#ifdef JOB_CONTROL
/* If interactive, make the shell the foreground process */
if (opts[MONITOR] && interact && (SHTTY != -1)) {
attachtty(GETPGRP());
if ((mypgrp = GETPGRP()) > 0) {
while ((ttpgrp = gettygrp()) != -1 && ttpgrp != mypgrp) {
sleep(1);
mypgrp = GETPGRP();
if (mypgrp == gettygrp())
break;
#ifndef __EMX__
killpg(mypgrp, SIGTTIN);
#endif
mypgrp = GETPGRP();
}
} else
opts[MONITOR] = 0;
} else
opts[MONITOR] = 0;
#else
opts[MONITOR] = 0;
#endif
}
