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when UNIX-LISTEN was applied to an existing file it failed as expected but removed the file

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This commit is contained in:
Gerhard Rieger 2010-10-03 16:28:06 +02:00
parent 4c3d1ca49d
commit cb913fbc0c
4 changed files with 51 additions and 15 deletions
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4
CHANGES
View file

@ -1,5 +1,9 @@
corrections:
when UNIX-LISTEN was applied to an existing file it failed as expected
but removed the file. Thanks to Bjoern Bosselmann for reporting this
problem
fixed a bug where socat might crash when connecting to a unix domain
socket using address GOPEN. Thanks to Martin Forssen for bug report and
patch.

32
test.sh
View file

@ -10297,7 +10297,37 @@ fi # NUMCOND
;;
esac
N=$((N+1))
set +vx
# test if socat keeps an existing file where it wanted to create a UNIX socket
NAME=UNIXLISTEN_KEEPFILE
case "$TESTS" in
*%functions%*|*%bugs%*|*%unix%*|*%socket%*|*%$NAME%*)
TEST="$NAME: socat keeps an existing file where it wanted to create a UNIX socket"
# we create a file and start socat with UNIX-LISTEN on this file. expected
# behaviour: socat exits immediately with error, but keeps the file
# up to 1.7.1.3, it removed the file
if ! eval $NUMCOND; then :; else
tf="$td/test$N.file"
te="$td/test$N.stderr"
CMD0="$SOCAT $opts -u UNIX-LISTEN:$tf /dev/null"
printf "test $F_n $TEST... " $N
rm -f "$tf"; touch "$tf"
$CMD0 >/dev/null 2>"${te}0"
rc0=$?
if [ $rc0 -ne 0 -a -f "$tf" ]; then
$PRINTF "$OK\n"
numOK=$((numOK+1))
else
$PRINTF "$FAILED\n"
echo "$CMD0"
cat "${te}0"
numFAIL=$((numFAIL+1))
fi
fi # NUMCOND
;;
esac
N=$((N+1))
###############################################################################

8
xio-listen.c
View file

@ -1,5 +1,5 @@
/* source: xio-listen.c */
/* Copyright Gerhard Rieger 2001-2009 */
/* Copyright Gerhard Rieger 2001-2010 */
/* Published under the GNU General Public License V.2, see file COPYING */
/* this file contains the source for listen socket options */
@ -299,12 +299,6 @@ int _xioopen_listen(struct single *xfd, int xioflags, struct sockaddr *us, sockl
level = E_ERROR;
#endif /* WITH_RETRY */
#if WITH_UNIX
/* with UNIX sockets: only listening parent is allowed to remove
the socket file */
xfd->opt_unlink_close = false;
#endif /* WITH_UNIX */
break;
}

22
xio-unix.c
View file

@ -1,5 +1,5 @@
/* source: xio-unix.c */
/* Copyright Gerhard Rieger 2001-2009 */
/* Copyright Gerhard Rieger 2001-2010 */
/* Published under the GNU General Public License V.2, see file COPYING */
/* this file contains the source for opening addresses of UNIX socket type */
@ -126,6 +126,7 @@ static int xioopen_unix_listen(int argc, const char *argv[], struct opt *opts, i
socklen_t uslen;
bool tight = true;
struct opt *opts0 = NULL;
pid_t pid = Getpid();
bool opt_unlink_early = false;
bool opt_unlink_close = true;
int result;
@ -147,12 +148,6 @@ static int xioopen_unix_listen(int argc, const char *argv[], struct opt *opts, i
/* only for non abstract because abstract do not work in file system */
retropt_bool(opts, OPT_UNLINK_EARLY, &opt_unlink_early);
retropt_bool(opts, OPT_UNLINK_CLOSE, &opt_unlink_close);
if (opt_unlink_close) {
if ((xfd->unlink_close = strdup(name)) == NULL) {
Error1("strdup(\"%s\"): out of memory", name);
}
xfd->opt_unlink_close = true;
}
}
if (applyopts_single(xfd, opts, PH_INIT) < 0) return STAT_NORETRY;
@ -183,6 +178,19 @@ static int xioopen_unix_listen(int argc, const char *argv[], struct opt *opts, i
opts, opts0, pf, socktype, protocol))
!= 0)
return result;
/* we set this option as late as now because we should not remove an
existing entry when bind() failed */
if (!(ABSTRACT && abstract)) {
if (opt_unlink_close) {
if (pid == Getpid()) {
if ((xfd->unlink_close = strdup(name)) == NULL) {
Error1("strdup(\"%s\"): out of memory", name);
}
xfd->opt_unlink_close = true;
}
}
}
return 0;
}
#endif /* WITH_LISTEN */