Fixed runtime bugs, detected by travis

Related: https://github.com/xaionaro/clsync/issues/124

@@ -32,10 +32,10 @@ build_test() {
 # Cleanup functions for run_example()
 run_example_cleanup_success() {
 	rm -rf "examples/testdir"/{to,from}/*
-	pkill -F "$CLSYNC_PIDFILE"
+	sudo pkill -F "$CLSYNC_PIDFILE"
 }
 run_example_cleanup_failure() {
-	pkill -F "$CLSYNC_PIDFILE" 2>/dev/null
+	sudo pkill -F "$CLSYNC_PIDFILE" 2>/dev/null
 	echo "$@" >&2
 	exit 1
 }
@@ -144,11 +144,10 @@ if true; then
 fi
 
 if true; then
+	export PATH="$(pwd):$PATH"
 
-	# Test coverage
+	# Functionality test
 
-	export CFLAGS="$CFLAGS --coverage -O0"
-	export PATH="$(pwd):$PATH"
 	build_test --enable-cluster --enable-debug --enable-paranoid=2 --enable-capabilities --without-mhash
 	run_example rsyncdirect
 	run_example rsyncdirect --splitting=thread --threading=off

@@ -25,5 +25,5 @@ cat > rules <<EOF
 +*.*
 EOF
 
-clsync -K example-cluster -c "$IPADDR" -M rsyncshell -w 2 -p safe -t 5 -W ./testdir/from -S ./clsync-synchandler-rsync.sh -R rules $@
+sudo $(which clsync) -K example-cluster -c "$IPADDR" -M rsyncshell -w 2 -p safe -t 5 -W ./testdir/from -S ./clsync-synchandler-rsync.sh -R rules $@
 

@@ -7,5 +7,5 @@ cat > rules <<EOF
 +*.*
 EOF
 
-clsync -K example-simple -M rsyncdirect -w2 -p safe -t5 -W ./testdir/from -R rules -D ./testdir/to $@
+sudo $(which clsync) -K example-simple -M rsyncdirect -w2 -p safe -t5 -W ./testdir/from -R rules -D ./testdir/to $@
 

@@ -7,5 +7,5 @@ cat > rules <<EOF
 +*.*
 EOF
 
-clsync -K example-rsync -l test -M rsyncshell -w2 -p safe -t5 -W ./testdir/from -S ./clsync-synchandler-rsyncshell.sh -R rules $@
+sudo $(which clsync) -K example-rsync -l test -M rsyncshell -w2 -p safe -t5 -W ./testdir/from -S ./clsync-synchandler-rsyncshell.sh -R rules $@
 

@@ -9,5 +9,5 @@ EOF
 
 cc -ggdb3 -fPIC -shared -o clsync-synchandler-rsyncso.so clsync-synchandler-rsyncso.c &&
 
-clsync -K example-rsyncso -M rsyncso -w2 -t5 -W ./testdir/from -S ./clsync-synchandler-rsyncso.so -R rules -D ./testdir/to $@
+sudo $(which clsync) -K example-rsyncso -M rsyncso -w2 -t5 -W ./testdir/from -S ./clsync-synchandler-rsyncso.so -R rules -D ./testdir/to $@
 

@@ -7,5 +7,5 @@ cat > rules <<EOF
 +*.*
 EOF
 
-clsync -K example-simple -M simple -w2 -t5 -W ./testdir/from -S $(which echo) -R rules $@
+sudo $(which clsync) -K example-simple -M simple -w2 -t5 -W ./testdir/from -S $(which echo) -R rules $@
 

@@ -9,5 +9,5 @@ EOF
 
 cc -ggdb3 -fPIC -shared -o clsync-synchandler-so.so clsync-synchandler-so.c &&
 
-clsync -K example-so -M so -w2 -t5 -W ./testdir/from -S ./clsync-synchandler-so.so -R rules -D ./testdir/to $@
+sudo $(which clsync) -K example-so -M so -w2 -t5 -W ./testdir/from -S ./clsync-synchandler-so.so -R rules -D ./testdir/to $@
 

@@ -417,8 +417,10 @@ int parent_isalive() {
 	debug(12, "parent_pid == %u", parent_pid);
 
 	if ((rc=kill(parent_pid, 0))) {
-		debug(1, "kill(%u, 0) => %i", parent_pid, rc);
-		return 0;
+		if (errno == ESRCH) {
+			debug(1, "kill(%u, 0) => %i; errno => %s", parent_pid, rc, strerror(errno));
+			return 0;
+		}
 	}
 
 	return 1;

@@ -108,6 +108,10 @@
 	SECCOMP_ALLOW_ACCUM_SYSCALL(nanosleep),				\
 	SECCOMP_ALLOW_ACCUM_SYSCALL(shmdt),				\
 	SECCOMP_ALLOW_ACCUM_SYSCALL(clone),		/* for --threading */		\
+	SECCOMP_ALLOW_ACCUM_SYSCALL(set_robust_list),	/* for --threading? */		\
+	SECCOMP_ALLOW_ACCUM_SYSCALL(madvise),				\
+	SECCOMP_ALLOW_ACCUM_SYSCALL(exit),				\
+
 
 
 /* Syscalls allowed to non-privileged thread */
@@ -938,7 +942,7 @@ int privileged_handler(ctx_t *ctx_p)
 			mprotect((void *)cmd_ret_p,	sizeof(*cmd_ret_p),	PROT_WRITE);
 		}
 
-		debug(10, "Got command %u", cmd_p->action);
+		debug(10, "Got command %u (euid:egid => %i:%i)", cmd_p->action, geteuid(), getegid());
 
 		if (!setup && cmd_p->action != PA_SETUP)
 			critical("A try to use commands before PA_SETUP");
@@ -952,6 +956,7 @@ int privileged_handler(ctx_t *ctx_p)
 				critical_on(pa_setup(opts, cmd_p->arg.ctx_p, &exec_uid, &exec_gid));
 				mprotect(opts, sizeof(*opts), PROT_READ);
 				use_args_check = cmd_p->arg.ctx_p->flags[CHECK_EXECVP_ARGS];
+				cap_drop(ctx_p, ctx_p->caps);	// TODO: Find out why "permission denined" without this line
 				setup++;
 				critical_on(errno);
 				break;
@@ -1847,7 +1852,7 @@ int privileged_init(ctx_t *ctx_p)
 	}
 
 	if (ctx_p->flags[GID] || ctx_p->flags[UID])
-		SAFE( seteuid(0), return errno);
+		SAFE( seteuid(0), {error("Not enough permission to start a privileged thread/fork"); return errno;});
 
 	if (ctx_p->flags[GID]) {
 		SAFE( setegid(0), return errno);

@@ -1308,6 +1308,9 @@ int sync_initialsync_walk(ctx_t *ctx_p, const char *dirpath, indexes_t *indexes_
 	char  *path_rel		= NULL;
 	size_t path_rel_len	= 0;
 
+#ifdef VERYPARANOID
+	errno = 0;
+#endif
 	while ((node = privileged_fts_read(tree, PC_SYNC_INIIALSYNC_WALK_FTS_READ))) {
 		switch (node->fts_info) {
 			// Duplicates:
@@ -1733,6 +1736,9 @@ int sync_mark_walk(ctx_t *ctx_p, const char *dirpath, indexes_t *indexes_p) {
 	char  *path_rel		= NULL;
 	size_t path_rel_len	= 0;
 
+#ifdef VERYPARANOID
+	errno = 0;
+#endif
 	while ((node = privileged_fts_read(tree, PC_SYNC_MARK_WALK_FTS_READ))) {
 #ifdef CLUSTER_SUPPORT
 		int ret;