Bug 19376
| Summary: | ncurses alters buffering of stdin/stdout and does not restore it. | ||
|---|---|---|---|
| Product: | Base System | Reporter: | Larry Rosenman <ler> |
| Component: | misc | Assignee: | freebsd-bugs (Nobody) <bugs> |
| Status: | Closed FIXED | ||
| Severity: | Affects Only Me | ||
| Priority: | Normal | ||
| Version: | 4.0-STABLE | ||
| Hardware: | Any | ||
| OS: | Any | ||
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Description
Larry Rosenman
2000-06-19 16:30:01 UTC
> I rebuilt my LERBSD box with the current (7/1) ncurses. > Please retry C-Kermit... > It's half fixed. After starting and then stopping curses, input is no longer buffered but output is still buffered. The current working sources are in /home/fdc/kermit. To build a version without the 4.0-specific setbuf hack, use: make clean make freebsd41 (I left a new "wermit" binary there too.) On the Internet, the same source package can be found at: ftp://kermit.columbia.edu/kermit/test/tar/x.tar.gz Then to test: ./wermit C-Kermit> telnet localhost (log in, start Kermit, put it in server mode, escape back) C-Kermit> send <a-file> This puts up the curses display. When the transfer is done, you get the C-Kermit> prompt back. At this point, when you type a regular character (such as letter) it does not echo. However, if you type a "wakeup" character such as "?", you get the expected response, which shows that input is unbuffered. If you type a command like "echo foo", the command itself doesn't echo until you press the Return key. So in the latest ncurses, endwin() has restored the previous buffering on stdin, but not on stdout. No other version of Unix, including the other *BSD's, or even pre-4.0 versions of FreeBSD, behave this way. Or at least *behaved* this way as of about New Years Day. If the same ncurses code is finding its way into new Linuxes, etc, then maybe they have the same problem but I haven't seen it yet, since I haven't done a "build-all" since New Years (it takes about a week to hit every platform). If you could post this as a followup to: http://www.freebsd.org/cgi/query-pr.cgi?pr=19376 I'd appreciate it -- for some reason my browser won't let me do it. (Also, please include the details of your installation & ncurses version, etc.) Thanks! - Frank ** This is with a CVSUP as of yesterday (7/10/2000 around 20:00 GMT-0500 (US/Central)) There was some discussion on this, and Frank da Cruz has now changed Kermit to use newterm() like Solaris and others. The fixes imported with 5.1 of ncurses seems to have fixed the input side. This can be closed, we believe. Larry Rosenman State Changed From-To: open->closed According to the submitters: a combination of a change to C-Kermit plus a new imported version of ncurses, appears to have fixed the problem. |