Fixes various problems such as inetd not reloading correctly.
Fix provided by Michael van Elst in [lib/14454] - thanks!
Should also fix [bin/12651] and [bin/13657]
Re-write t_agetstr() so that it does not use realloc so userland
programs don't break. We now use an internal buffer to keep track
of the memory we allocate. This changes the api of t_agetstr() to
take 2 fewer arguments, but there are not many programs that use it.
Please note that this does not change binary compatibility with the
previous t_agetstr() since the usage was:
char *area, *p;
*area = NULL;
t_agetstr(ti, "ic", &area, &p);
...
free(area);
Since we don't touch the arguments and free(NULL) is a no-op, nothing
breaks.
Since we don't break binary compatibility there is no reason to bump
the library's major number, but since we change t_agetstr() I'll bump
the minor number for good measure.
until the problem gets addressed properly. The following fix
is a stopgap measure to stop the leaking :-(
I fixed the t_getstr() memory leak problem, but that instantly
revealed a problem in t_agetstr() which is an extremely broken
interface. It realloc's memory, potentially moving the area where
it returned pointers into in previous calls. This function needs
to be removed and or changed. I added a horrible work-around for
now, but I will revisit the problem shortly. In the meantime nobody
should be using the t_agetstr() API, and I'll be fixing the rest
of the programs and or the API when I figure out the best solution...
This is t_agetstr() is used by:
games/hack/hack.termcap.c
games/larn/io.c
games/tetris/screen.c
lib/libterm/termcap.c
lib/libterm/termcap.h
libexec/getty/main.c
usr.bin/top/screen.c
usr.bin/ul/ul.c
defined, as <bsd.own.mk> always sets it; also, compare only against "yes"
(not "no") for a yes/no check, as there are two negative states ("no" and
"never").
* Don't return if wait()ing for the child is interrupted.
* Fix a race condition for the parent's SIG{INT,QUIT} disposition.
* While we're here, convert from using signal(3) to sigaction(2).
chris