mod_export char *
shingetline(void)
{
char *line = NULL;
int ll = 0;
int c;
char buf[BUFSIZ];
char *p;
p = buf;
winch_unblock();
for (;;) {
do {
errno = 0;
c = fgetc(bshin);
} while (c < 0 && errno == EINTR);
if (c < 0 || c == '\n') {
winch_block();
if (c == '\n')
*p++ = '\n';
if (p > buf) {
*p++ = '\0';
line = zrealloc(line, ll + (p - buf));
memcpy(line + ll, buf, p - buf);
}
return line;
}
if (imeta(c)) {
*p++ = Meta;
*p++ = c ^ 32;
} else
*p++ = c;
if (p >= buf + BUFSIZ - 1) {
winch_block();
line = zrealloc(line, ll + (p - buf) + 1);
memcpy(line + ll, buf, p - buf);
ll += p - buf;
line[ll] = '\0';
p = buf;
winch_unblock();
}
}
}
static int
raw_getbyte(long do_keytmout, char *cptr)
{
int ret;
struct ztmout tmout;
#if defined(HAS_TIO) && \
(defined(sun) || (!defined(HAVE_POLL) && !defined(HAVE_SELECT)))
struct ttyinfo ti;
#endif
#ifndef HAVE_POLL
# ifdef HAVE_SELECT
fd_set foofd, errfd;
FD_ZERO(&errfd);
# endif
#endif
calc_timeout(&tmout, do_keytmout);
/*
* Handle timeouts and watched fd's. If a watched fd or a function
* timeout triggers we restart any key timeout. This is likely to
* be harmless: the combination is extremely rare and a function
* is likely to occupy the user for a little while anyway. We used
* to make timeouts take precedence, but we can't now that the
* timeouts may be external, so we may have both a permanent watched
* fd and a long-term timeout.
*/
if ((nwatch || tmout.tp != ZTM_NONE)) {
#if defined(HAVE_SELECT) || defined(HAVE_POLL)
int i, errtry = 0, selret;
# ifdef HAVE_POLL
int nfds;
struct pollfd *fds;
# endif
# if defined(HAS_TIO) && defined(sun)
/*
* Yes, I know this is complicated. Yes, I know we
* already have three bits of code to poll the terminal
* down below. No, I don't want to do this either.
* However, it turns out on certain OSes, specifically
* Solaris, that you can't poll typeahead for love nor
* money without actually trying to read it. But
* if we are trying to select (and we need to if we
* are watching other fd's) we won't pick that up.
* So we just try and read it without blocking in
* the time-honoured (i.e. absurdly baroque) termios
* fashion.
*/
gettyinfo(&ti);
ti.tio.c_cc[VMIN] = 0;
settyinfo(&ti);
winch_unblock();
ret = read(SHTTY, cptr, 1);
winch_block();
ti.tio.c_cc[VMIN] = 1;
settyinfo(&ti);
if (ret > 0)
return 1;
# endif
# ifdef HAVE_POLL
nfds = 1 + nwatch;
/* First pollfd is SHTTY, following are the nwatch fds */
fds = zalloc(sizeof(struct pollfd) * nfds);
fds[0].fd = SHTTY;
/*
* POLLIN, POLLIN, POLLIN,
* Keep those fd's POLLIN...
*/
fds[0].events = POLLIN;
for (i = 0; i < nwatch; i++) {
fds[i+1].fd = watch_fds[i].fd;
fds[i+1].events = POLLIN;
}
# endif
for (;;) {
# ifdef HAVE_POLL
int poll_timeout;
if (tmout.tp != ZTM_NONE)
poll_timeout = tmout.exp100ths * 10;
else
poll_timeout = -1;
winch_unblock();
selret = poll(fds, errtry ? 1 : nfds, poll_timeout);
winch_block();
# else
int fdmax = SHTTY;
struct timeval *tvptr;
struct timeval expire_tv;
FD_ZERO(&foofd);
FD_SET(SHTTY, &foofd);
if (!errtry) {
for (i = 0; i < nwatch; i++) {
int fd = watch_fds[i].fd;
if (FD_ISSET(fd, &errfd))
continue;
FD_SET(fd, &foofd);
if (fd > fdmax)
fdmax = fd;
}
}
FD_ZERO(&errfd);
if (tmout.tp != ZTM_NONE) {
expire_tv.tv_sec = tmout.exp100ths / 100;
expire_tv.tv_usec = (tmout.exp100ths % 100) * 10000L;
tvptr = &expire_tv;
}
else
tvptr = NULL;
winch_unblock();
selret = select(fdmax+1, (SELECT_ARG_2_T) & foofd,
NULL, NULL, tvptr);
winch_block();
# endif
/*
* Make sure a user interrupt gets passed on straight away.
*/
if (selret < 0 && (errflag || retflag || breaks || exit_pending))
break;
/*
* Try to avoid errors on our special fd's from
* messing up reads from the terminal. Try first
* with all fds, then try unsetting the special ones.
*/
if (selret < 0 && !errtry) {
errtry = 1;
continue;
}
if (selret == 0) {
/*
* Nothing ready and no error, so we timed out.
*/
switch (tmout.tp) {
case ZTM_NONE:
/* keeps compiler happy if not debugging */
#ifdef DEBUG
dputs("BUG: timeout fired with no timeout set.");
#endif
/* treat as if a key timeout triggered */
/*FALLTHROUGH*/
case ZTM_KEY:
/* Special value -2 signals nothing ready */
selret = -2;
break;
case ZTM_FUNC:
while (firstnode(timedfns)) {
Timedfn tfdat = (Timedfn)getdata(firstnode(timedfns));
/*
* It's possible a previous function took
* a long time to run (though it can't
* call zle recursively), so recalculate
* the time on each iteration.
*/
time_t now = time(NULL);
if (tfdat->when > now)
break;
tfdat->func();
}
/* Function may have messed up the display */
if (resetneeded)
zrefresh();
/* We need to recalculate the timeout */
/*FALLTHROUGH*/
case ZTM_MAX:
/*
* Reached the limit of our range, but not the
* actual timeout; recalculate the timeout.
* We're cheating with the key timeout here:
* if one clashed with a function timeout we
* reconsider the key timeout from scratch.
* The effect of this is microscopic.
*/
calc_timeout(&tmout, do_keytmout);
break;
}
/*
* If we handled the timeout successfully,
* carry on.
*/
if (selret == 0)
continue;
}
/* If error or unhandled timeout, give up. */
if (selret < 0)
break;
/*
* If there's user input handle it straight away.
* This improves the user's ability to handle exceptional
* conditions like runaway output.
*/
if (
# ifdef HAVE_POLL
(fds[0].revents & POLLIN)
# else
FD_ISSET(SHTTY, &foofd)
# endif
)
break;
if (nwatch && !errtry) {
/*
* Copy the details of the watch fds in case the
* user decides to delete one from inside the
* handler function.
*/
int lnwatch = nwatch;
Watch_fd lwatch_fds = zalloc(lnwatch*sizeof(struct watch_fd));
memcpy(lwatch_fds, watch_fds, lnwatch*sizeof(struct watch_fd));
for (i = 0; i < lnwatch; i++)
lwatch_fds[i].func = ztrdup(lwatch_fds[i].func);
for (i = 0; i < lnwatch; i++) {
Watch_fd lwatch_fd = lwatch_fds + i;
if (
# ifdef HAVE_POLL
(fds[i+1].revents & (POLLIN|POLLERR|POLLHUP|POLLNVAL))
# else
FD_ISSET(lwatch_fd->fd, &foofd) ||
FD_ISSET(lwatch_fd->fd, &errfd)
# endif
) {
/* Handle the fd. */
char *fdbuf;
{
char buf[BDIGBUFSIZE];
convbase(buf, lwatch_fd->fd, 10);
fdbuf = ztrdup(buf);
}
if (lwatch_fd->widget) {
zlecallhook(lwatch_fd->func, fdbuf);
zsfree(fdbuf);
} else {
LinkList funcargs = znewlinklist();
zaddlinknode(funcargs, ztrdup(lwatch_fd->func));
zaddlinknode(funcargs, fdbuf);
# ifdef HAVE_POLL
# ifdef POLLERR
if (fds[i+1].revents & POLLERR)
zaddlinknode(funcargs, ztrdup("err"));
# endif
# ifdef POLLHUP
if (fds[i+1].revents & POLLHUP)
zaddlinknode(funcargs, ztrdup("hup"));
# endif
# ifdef POLLNVAL
if (fds[i+1].revents & POLLNVAL)
zaddlinknode(funcargs, ztrdup("nval"));
# endif
# else
if (FD_ISSET(lwatch_fd->fd, &errfd))
zaddlinknode(funcargs, ztrdup("err"));
# endif
callhookfunc(lwatch_fd->func, funcargs, 0, NULL);
freelinklist(funcargs, freestr);
}
if (errflag) {
/* No sensible way of handling errors here */
errflag &= ~ERRFLAG_ERROR;
/*
* Paranoia: don't run the hooks again this
* time.
*/
errtry = 1;
}
}
}
/* Function may have invalidated the display. */
if (resetneeded)
zrefresh();
for (i = 0; i < lnwatch; i++)
zsfree(lwatch_fds[i].func);
zfree(lwatch_fds, lnwatch*sizeof(struct watch_fd));
# ifdef HAVE_POLL
/* Function may have added or removed handlers */
nfds = 1 + nwatch;
if (nfds > 1) {
fds = zrealloc(fds, sizeof(struct pollfd) * nfds);
for (i = 0; i < nwatch; i++) {
/*
* This is imperfect because it assumes fds[] and
* watch_fds[] remain in sync, which may be false
* if handlers are shuffled. However, it should
* be harmless (e.g., produce one extra pass of
* the loop) in the event they fall out of sync.
*/
if (fds[i+1].fd == watch_fds[i].fd &&
(fds[i+1].revents & (POLLERR|POLLHUP|POLLNVAL))) {
fds[i+1].events = 0; /* Don't poll this */
} else {
fds[i+1].fd = watch_fds[i].fd;
fds[i+1].events = POLLIN;
}
fds[i+1].revents = 0;
}
}
# endif
}
}
# ifdef HAVE_POLL
zfree(fds, sizeof(struct pollfd) * nfds);
# endif
if (selret < 0)
return selret;
#else
# ifdef HAS_TIO
ti = shttyinfo;
ti.tio.c_lflag &= ~ICANON;
ti.tio.c_cc[VMIN] = 0;
ti.tio.c_cc[VTIME] = tmout.exp100ths / 10;
# ifdef HAVE_TERMIOS_H
tcsetattr(SHTTY, TCSANOW, &ti.tio);
# else
ioctl(SHTTY, TCSETA, &ti.tio);
# endif
winch_unblock();
ret = read(SHTTY, cptr, 1);
winch_block();
# ifdef HAVE_TERMIOS_H
tcsetattr(SHTTY, TCSANOW, &shttyinfo.tio);
# else
ioctl(SHTTY, TCSETA, &shttyinfo.tio);
# endif
return (ret <= 0) ? ret : *cptr;
# endif
#endif
}
winch_unblock();
ret = read(SHTTY, cptr, 1);
winch_block();
return ret;
}
