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avoid #wizrumorcheck crash on bad rumor input

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If either rumors.tru or rumors.fal was empty when makedefs made
'rumors', init_rumors() will set true_rumor_size to -1 to indicate
that rumors aren't available.  It also closes the input file, and
then #wizrumorcheck closed that again, triggering a crash in the
dlb code.

Fortune cookies and oracles work ok (just not very interesting)
when rumors aren't available.  Only the check command had trouble
with that.
This commit is contained in:
PatR
2020-03-05 13:55:45 -08:00
parent 998893ac32
commit 32b69f5c33
2 changed files with 22 additions and 23 deletions
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41
src/rumors.c
View File

@@ -1,4 +1,4 @@
/* NetHack 3.6 rumors.c $NHDT-Date: 1582364450 2020/02/22 09:40:50 $ $NHDT-Branch: NetHack-3.7 $:$NHDT-Revision: 1.51 $ */
/* NetHack 3.6 rumors.c $NHDT-Date: 1583445339 2020/03/05 21:55:39 $ $NHDT-Branch: NetHack-3.6-Mar2020 $:$NHDT-Revision: 1.38 $ */
/* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
/*-Copyright (c) Robert Patrick Rankin, 2012. */
/* NetHack may be freely redistributed. See license for details. */
@@ -159,9 +159,10 @@ boolean exclude_cookie;
couldnt_open_file(RUMORFILE);
true_rumor_size = -1; /* don't try to open it again */
}
/* this is safe either way, so do it always since we can't get the definition
* out of makedefs.c
*/
/* this is safe either way, so do it always since we can't get the
* definition out of makedefs.c
*/
#define PAD_RUMORS_TO
#ifdef PAD_RUMORS_TO
/* remove padding */
@@ -188,10 +189,8 @@ rumor_check()
char *endp, line[BUFSZ], xbuf[BUFSZ], rumor_buf[BUFSZ];
if (true_rumor_size < 0L) { /* we couldn't open RUMORFILE */
no_rumors:
no_rumors:
pline("rumors not accessible.");
if (rumors)
(void) dlb_fclose(rumors);
return;
}
@@ -203,29 +202,27 @@ rumor_check()
rumor_buf[0] = '\0';
if (true_rumor_size == 0L) { /* if this is 1st outrumor() */
init_rumors(rumors);
if (true_rumor_size < 0L)
if (true_rumor_size < 0L) {
rumors = (dlb *) 0; /* init_rumors() closes it upon failure */
goto no_rumors; /* init failed */
}
}
tmpwin = create_nhwindow(NHW_TEXT);
/*
* reveal the values.
*/
Sprintf(
rumor_buf,
"T start=%06ld (%06lx), end=%06ld (%06lx), size=%06ld (%06lx)",
(long) true_rumor_start, true_rumor_start, true_rumor_end,
(unsigned long) true_rumor_end, true_rumor_size,
(unsigned long) true_rumor_size);
Sprintf(rumor_buf,
"T start=%06ld (%06lx), end=%06ld (%06lx), size=%06ld (%06lx)",
(long) true_rumor_start, true_rumor_start,
true_rumor_end, (unsigned long) true_rumor_end,
true_rumor_size, (unsigned long) true_rumor_size);
putstr(tmpwin, 0, rumor_buf);
Sprintf(
rumor_buf,
"F start=%06ld (%06lx), end=%06ld (%06lx), size=%06ld (%06lx)",
(long) false_rumor_start, false_rumor_start, false_rumor_end,
(unsigned long) false_rumor_end, false_rumor_size,
(unsigned long) false_rumor_size);
Sprintf(rumor_buf,
"F start=%06ld (%06lx), end=%06ld (%06lx), size=%06ld (%06lx)",
(long) false_rumor_start, false_rumor_start,
false_rumor_end, (unsigned long) false_rumor_end,
false_rumor_size, (unsigned long) false_rumor_size);
putstr(tmpwin, 0, rumor_buf);
/*