nethack-gwaa-kiwi/nethack
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unix USE_FCNTL vs 'perm'

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Reported directly to devteam, the POSIX_TYPES subset (most? all
these days?) of Unix that defines USE_FCNTL was unlocking lock file
'perm' when done with it but wasn't explicitly closing it unless
the unlocking failed.  Triggered a valgrind complaint and could have
posed a problem if restart gets implemented for this configuraiton.
This commit is contained in:
PatR
2019-11-06 10:52:48 -08:00
parent 423bce2bf6
commit d13911495c
2 changed files with 10 additions and 8 deletions
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15
src/files.c
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@@ -1,4 +1,4 @@
/* NetHack 3.6 files.c $NHDT-Date: 1571347976 2019/10/17 21:32:56 $ $NHDT-Branch: NetHack-3.6 $:$NHDT-Revision: 1.254 $ */
/* NetHack 3.6 files.c $NHDT-Date: 1573066357 2019/11/06 18:52:37 $ $NHDT-Branch: NetHack-3.6 $:$NHDT-Revision: 1.260 $ */
/* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
/*-Copyright (c) Derek S. Ray, 2015. */
/* NetHack may be freely redistributed. See license for details. */
@@ -1644,7 +1644,7 @@ boolean uncomp;
static int nesting = 0;
#if defined(NO_FILE_LINKS) || defined(USE_FCNTL) /* implies UNIX */
static int lockfd; /* for lock_file() to pass to unlock_file() */
static int lockfd = -1; /* for lock_file() to pass to unlock_file() */
#endif
#ifdef USE_FCNTL
struct flock sflock; /* for unlocking, same as above */
@@ -1756,7 +1756,7 @@ int retryct;
return FALSE;
}
#else
register int errnosv = errno;
int errnosv = errno;
switch (errnosv) { /* George Barbanis */
case EEXIST:
@@ -1867,9 +1867,10 @@ const char *filename;
if (nesting == 1) {
#ifdef USE_FCNTL
sflock.l_type = F_UNLCK;
if (fcntl(lockfd, F_SETLK, &sflock) == -1) {
HUP raw_printf("Can't remove fcntl lock on %s.", filename);
(void) close(lockfd);
if (lockfd >= 0) {
if (fcntl(lockfd, F_SETLK, &sflock) == -1)
HUP raw_printf("Can't remove fcntl lock on %s.", filename);
(void) close(lockfd), lockfd = -1;
}
#else
lockname = make_lockname(filename, locknambuf);
@@ -1881,7 +1882,7 @@ const char *filename;
if (unlink(lockname) < 0)
HUP raw_printf("Can't unlink %s.", lockname);
#ifdef NO_FILE_LINKS
(void) nhclose(lockfd);
(void) nhclose(lockfd), lockfd = -1;
#endif
#endif /* UNIX || VMS */