ado@elsie.UUCP (Arthur David Olson) (09/15/84)
Patient--
/usr/src/lib/libtermlib/termcap.c in 4.1bsd
/usr/src/usr.lib/libtermlib/termcap.c in 4.2bsd
Condition--
Calling "tgetent" multiple times can result in spurious diagnostics.
Stimulus--
#include <stdio.h>
main()
{
int i;
char buf[1024];
for (i = 1; i < 40 ; ++i)
if (tgetent(buf, "vt100w") != 1)
return 1;
else printf("okay on pass %d\n");
return 0;
}
If you get an "Infinite tc= loop" diagnostic after a number of
successful passes, you've got the bug.
Diagnosis--
A variable named "hopcount" counts the total number of "tc=" constructs
found in termcap entries. Alas, hopcount counts the total number of
"tc="s found during the life of the process.
Cure--
We'll go for minimizing changes to existing code here.
ed /usr/src/lib/libtermlib/termcap.c
g/return(tnchktc/i\
#ifdef OLDVERSION
g/return(tnchktc/a\
#else\
i = tnchktc(); hopcount = 0; return i;\
#endif
w
q
--
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