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ctdb-common: CID 1507498: Control flow issues (DEADCODE)

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Fix typo in error checking.  While here adjust the bottom of the
range, making errno 0 invalid.

Add corresponding test cases using an alternative syntax for errno packets
(#nnn[;] - trailing ';' is optional).

Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>

Autobuild-User(master): Amitay Isaacs <amitay@samba.org>
Autobuild-Date(master): Mon Aug  1 09:19:55 UTC 2022 on sn-devel-184
This commit is contained in:
Martin Schwenke 2022-07-30 10:19:56 +10:00 committed by Amitay Isaacs
parent 7a6bd22798
commit 3aecd6e7b5
3 changed files with 41 additions and 1 deletions
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2
ctdb/common/tmon.c
View File

@ -97,7 +97,7 @@ bool tmon_set_exit(struct tmon_pkt *pkt)
bool tmon_set_errno(struct tmon_pkt *pkt, int err)
{
if (err < 0 && err > UINT16_MAX) {
if (err <= 0 || err > UINT16_MAX) {
return false;
}

29
ctdb/tests/UNIT/cunit/tmon_test_002.sh
View File

@ -4,6 +4,7 @@
epipe=$(errcode EPIPE)
etimedout=$(errcode ETIMEDOUT)
edom=$(errcode EDOM)
test_cases()
{
@ -35,6 +36,34 @@ WRITER OK
EOF
unit_test tmon_test "7" false 0 false
test_case "errno 110 packet @ 1s, no timeout"
ok <<EOF
READER ERR=110
WRITER OK
EOF
unit_test tmon_test "#110" false 0 false
test_case "errno 0 error causes EDOM @ 1s, no timeout"
ok <<EOF
WRITER ERR=$edom
READER ERR=$epipe
EOF
unit_test tmon_test "#0;" false 0 false
test_case "errno -1 error causes EDOM @ 1s, no timeout"
ok <<EOF
WRITER ERR=$edom
READER ERR=$epipe
EOF
unit_test tmon_test "#-1;" false 0 false
test_case "errno 70000 error causes EDOM @ 1s, no timeout"
ok <<EOF
WRITER ERR=$edom
READER ERR=$epipe
EOF
unit_test tmon_test "#70000;!0" false 0 false
test_case "Exit packet @ 3s, no timeout"
ok <<EOF
READER OK

11
ctdb/tests/src/tmon_test.c
View File

@ -45,6 +45,7 @@ static int test_write_callback(void *private_data, struct tmon_pkt *pkt)
private_data, struct test_write_state);
bool status;
size_t len;
char *end;
int err;
char c;
const char *t;
@ -75,6 +76,16 @@ static int test_write_callback(void *private_data, struct tmon_pkt *pkt)
case '!':
status = tmon_set_ping(pkt);
break;
case '#':
/* Additional errno syntax: #nnn[;] */
t = &state->write_data[state->offset];
err = (int)strtol(t, &end, 10);
state->offset += (end - t);
if (state->write_data[state->offset] == ';') {
state->offset++;
}
status = tmon_set_errno(pkt, err);
break;
default:
status = false;
}