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Libunit: improved error logging around initialization env variable.

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This commit is contained in:
Valentin Bartenev 2020-11-24 16:40:35 +03:00
parent 35178dbb06
commit 956fce6614
1 changed files with 33 additions and 14 deletions
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47
src/nxt_unit.c
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@ -784,8 +784,8 @@ nxt_unit_read_env(nxt_unit_port_t *ready_port, nxt_unit_port_t *router_port,
{
int rc;
int ready_fd, router_fd, read_in_fd, read_out_fd;
char *unit_init, *version_end;
long version_length;
char *unit_init, *version_end, *vars;
size_t version_length;
int64_t ready_pid, router_pid, read_pid;
uint32_t ready_stream, router_id, ready_id, read_id;
@ -797,21 +797,30 @@ nxt_unit_read_env(nxt_unit_port_t *ready_port, nxt_unit_port_t *router_port,
return NXT_UNIT_ERROR;
}
nxt_unit_debug(NULL, "%s='%s'", NXT_UNIT_INIT_ENV, unit_init);
version_length = nxt_length(NXT_VERSION);
version_end = strchr(unit_init, ';');
if (version_end == NULL
|| version_end - unit_init != version_length
|| memcmp(unit_init, NXT_VERSION, version_length) != 0)
{
nxt_unit_alert(NULL, "version check error");
if (nxt_slow_path(version_end == NULL)) {
nxt_unit_alert(NULL, "Unit version not found in %s=\"%s\"",
NXT_UNIT_INIT_ENV, unit_init);
return NXT_UNIT_ERROR;
}
rc = sscanf(version_end + 1,
version_length = version_end - unit_init;
rc = version_length != nxt_length(NXT_VERSION)
|| memcmp(unit_init, NXT_VERSION, nxt_length(NXT_VERSION));
if (nxt_slow_path(rc != 0)) {
nxt_unit_alert(NULL, "versions mismatch: the Unit daemon has version "
"%.*s, while the app was compiled with libunit %s",
(int) version_length, unit_init, NXT_VERSION);
return NXT_UNIT_ERROR;
}
vars = version_end + 1;
rc = sscanf(vars,
"%"PRIu32";"
"%"PRId64",%"PRIu32",%d;"
"%"PRId64",%"PRIu32",%d;"
@ -823,12 +832,22 @@ nxt_unit_read_env(nxt_unit_port_t *ready_port, nxt_unit_port_t *router_port,
&read_pid, &read_id, &read_in_fd, &read_out_fd,
log_fd, shm_limit);
if (nxt_slow_path(rc != 13)) {
nxt_unit_alert(NULL, "failed to scan variables: %d", rc);
if (nxt_slow_path(rc == EOF)) {
nxt_unit_alert(NULL, "sscanf(%s) failed: %s (%d) for %s env",
vars, strerror(errno), errno, NXT_UNIT_INIT_ENV);
return NXT_UNIT_ERROR;
}
if (nxt_slow_path(rc != 13)) {
nxt_unit_alert(NULL, "invalid number of variables in %s env: "
"found %d of %d in %s", NXT_UNIT_INIT_ENV, rc, 13, vars);
return NXT_UNIT_ERROR;
}
nxt_unit_debug(NULL, "%s='%s'", NXT_UNIT_INIT_ENV, unit_init);
nxt_unit_port_id_init(&ready_port->id, (pid_t) ready_pid, ready_id);
ready_port->in_fd = -1;