int
VUT_Main(void)
{
struct VSL_cursor *c;
int i = -1;
AN(VUT.vslq);
while (!VUT.sigint) {
if (VUT.sighup && VUT.sighup_f) {
/* sighup callback */
VUT.sighup = 0;
i = (VUT.sighup_f)();
if (i)
break;
}
if (VUT.sigusr1) {
/* Flush and report any incomplete records */
VUT.sigusr1 = 0;
VSLQ_Flush(VUT.vslq, vut_dispatch, NULL);
}
if (VUT.vsm != NULL && !VSM_IsOpen(VUT.vsm)) {
/* Reconnect VSM */
AZ(VUT.r_arg);
VTIM_sleep(0.1);
if (VSM_Open(VUT.vsm)) {
VSM_ResetError(VUT.vsm);
continue;
}
c = VSL_CursorVSM(VUT.vsl, VUT.vsm,
VSL_COPT_TAIL | VSL_COPT_BATCH);
if (c == NULL) {
VSL_ResetError(VUT.vsl);
VSM_Close(VUT.vsm);
continue;
}
VSLQ_SetCursor(VUT.vslq, &c);
AZ(c);
VUT_Error(0, "Log reacquired");
}
i = VSLQ_Dispatch(VUT.vslq, vut_dispatch, NULL);
if (i == 1)
/* Call again */
continue;
else if (i == 0) {
/* Nothing to do but wait */
if (VUT.idle_f) {
i = (VUT.idle_f)();
if (i)
break;
}
VTIM_sleep(0.01);
continue;
} else if (i == -1) {
/* EOF */
break;
}
if (VUT.vsm == NULL)
break;
/* XXX: Make continuation optional */
VSLQ_Flush(VUT.vslq, vut_dispatch, NULL);
if (i == -2)
/* Abandoned */
VUT_Error(0, "Log abandoned");
else if (i < -2)
/* Overrun */
VUT_Error(0, "Log overrun");
VSM_Close(VUT.vsm);
}
return (i);
}
static unsigned int vlog_reply(struct http_request *request, void *data)
{
struct vlog_req_priv vrp = { .limit = 10 };
int disp_status;
char *p;
char *tag = NULL;
char *tag_re = NULL;
struct VSL_data *vsl = NULL;
struct VSLQ *vslq = NULL;
struct VSL_cursor *c = NULL;
enum VSL_grouping_e grouping = VSL_g_request;
struct agent_core_t *core = data;
p = next_slash(request->url + 1);
if (p) {
char *lim = strdup(p);
assert(lim);
char *tmp2 = strchr(lim, '/');
if (tmp2 && *tmp2) *tmp2 = '\0';
int j = sscanf(lim, "%u", &vrp.limit);
if(j != 1) {
free(lim);
http_reply(request->connection, 500, "Not a number");
return 0;
}
free(lim);
p = next_slash(p);
}
if (p) {
tag = strdup(p);
char *tmp2 = strchr(tag,'/');
if (tmp2 && *tmp2) *tmp2 = '\0';
p = next_slash(p);
}
if (p) {
tag_re = strdup(p);
char *tmp2 = strchr(tag_re, '/');
if (tmp2 && *tmp2) *tmp2 = '\0';
p = next_slash(p);
}
vrp.answer = VSB_new_auto();
assert(vrp.answer != NULL);
vrp.vsm = VSM_New();
assert(vrp.vsm);
if (!VSM_n_Arg(vrp.vsm, core->config->n_arg)) {
VSB_printf(vrp.answer, "Error in creating shmlog: %s",
VSM_Error(vrp.vsm));
VSB_finish(vrp.answer);
http_reply(request->connection, 500, VSB_data(vrp.answer));
goto cleanup;
}
if (VSM_Open(vrp.vsm) != 0) {
VSB_printf(vrp.answer, "Error in opening shmlog: %s",
VSM_Error(vrp.vsm));
VSB_finish(vrp.answer);
http_reply(request->connection, 500, VSB_data(vrp.answer));
goto cleanup;
}
vsl = VSL_New();
assert(vsl);
if (tag) {
grouping = VSL_g_raw;
if (VSL_Arg(vsl, 'i', tag) < 0) {
VSB_printf(vrp.answer, "Unable to specify tag '%s': %s",
tag, VSL_Error(vsl));
VSB_finish(vrp.answer);
http_reply(request->connection, 500, VSB_data(vrp.answer));
goto cleanup;
}
if (tag_re) {
VSL_Arg(vsl,'I', tag_re);
}
}
c = VSL_CursorVSM(vsl, vrp.vsm,
VSL_COPT_BATCH | VSL_COPT_TAILSTOP);
if (c == NULL) {
VSB_printf(vrp.answer, "Can't open log (%s)",
VSL_Error(vsl));
VSB_finish(vrp.answer);
http_reply(request->connection, 500, VSB_data(vrp.answer));
goto cleanup;
}
vslq = VSLQ_New(vsl, &c, grouping, NULL);
if (vslq == NULL) {
VSB_clear(vrp.answer);
VSB_printf(vrp.answer, "Error in creating query: %s",
VSL_Error(vsl));
http_reply(request->connection, 500, VSB_data(vrp.answer));
goto cleanup;
}
VSB_printf(vrp.answer, "{ \"log\": [");
do {
disp_status = VSLQ_Dispatch(vslq, vlog_cb_func, &vrp);
} while (disp_status == 1 && vrp.entries < vrp.limit);
VSB_printf(vrp.answer, "\n] }\n");
assert(VSB_finish(vrp.answer) == 0);
if (VSB_len(vrp.answer) > 1) {
struct http_response *resp = http_mkresp(request->connection, 200, NULL);
resp->data = VSB_data(vrp.answer);
resp->ndata = VSB_len(vrp.answer);
http_add_header(resp,"Content-Type","application/json");
send_response(resp);
http_free_resp(resp);
} else {
http_reply(request->connection, 500, "FAIL");
}
cleanup:
free(tag);
free(tag_re);
VSB_delete(vrp.answer);
if (vslq)
VSLQ_Delete(&vslq);
if (vsl)
VSL_Delete(vsl);
if (vrp.vsm)
VSM_Delete(vrp.vsm);
vrp.answer = NULL;
return 0;
}
void vlog_init(struct agent_core_t *core)
{
struct agent_plugin_t *plug;
struct vlog_priv_t *priv;
ALLOC_OBJ(priv);
plug = plugin_find(core,"vlog");
plug->data = priv;
http_register_url(core, "/log", M_GET, vlog_reply, core);
}
void
VUT_Setup(void)
{
struct VSL_cursor *c;
double t_start;
int i;
AN(VUT.vsl);
AZ(VUT.vsm);
AZ(VUT.vslq);
/* Check input arguments */
if ((VUT.n_arg == NULL ? 0 : 1) +
(VUT.N_arg == NULL ? 0 : 1) +
(VUT.r_arg == NULL ? 0 : 1) > 1)
VUT_Error(1, "Only one of -n, -N and -r options may be used");
/* Create and validate the query expression */
VUT.vslq = VSLQ_New(VUT.vsl, NULL, VUT.g_arg, VUT.q_arg);
if (VUT.vslq == NULL)
VUT_Error(1, "Query expression error:\n%s", VSL_Error(VUT.vsl));
/* Setup input */
if (VUT.r_arg) {
REPLACE(VUT.name, VUT.r_arg);
c = VSL_CursorFile(VUT.vsl, VUT.r_arg, 0);
if (c == NULL)
VUT_Error(1, "Can't open log file (%s)",
VSL_Error(VUT.vsl));
} else {
VUT.vsm = VSM_New();
AN(VUT.vsm);
if (VUT.n_arg && VSM_n_Arg(VUT.vsm, VUT.n_arg) <= 0)
VUT_Error(1, "%s", VSM_Error(VUT.vsm));
if (VUT.N_arg && VSM_N_Arg(VUT.vsm, VUT.N_arg) <= 0)
VUT_Error(1, "%s", VSM_Error(VUT.vsm));
REPLACE(VUT.name, VSM_Name(VUT.vsm));
t_start = NAN;
c = NULL;
while (1) {
i = VSM_Open(VUT.vsm);
if (!i)
c = VSL_CursorVSM(VUT.vsl, VUT.vsm,
(VUT.d_opt ? VSL_COPT_TAILSTOP :
VSL_COPT_TAIL)
| VSL_COPT_BATCH);
if (c)
break;
if (isnan(t_start) && VUT.t_arg > 0.) {
VUT_Error(0, "Can't open log -"
" retrying for %.0f seconds", VUT.t_arg);
t_start = VTIM_real();
}
VSM_Close(VUT.vsm);
if (VUT.t_arg <= 0.)
break;
if (VTIM_real() - t_start > VUT.t_arg)
break;
VSM_ResetError(VUT.vsm);
VSL_ResetError(VUT.vsl);
VTIM_sleep(0.5);
}
if (VUT.t_arg >= 0. && (i || !c)) {
if (i)
VUT_Error(1, "Can't open VSM file (%s)",
VSM_Error(VUT.vsm));
else
VUT_Error(1, "Can't open log (%s)",
VSL_Error(VUT.vsl));
} else if (!isnan(t_start))
VUT_Error(0, "Log opened");
}
if (c)
VSLQ_SetCursor(VUT.vslq, &c);
AZ(c);
/* Signal handlers */
(void)signal(SIGHUP, vut_sighup);
(void)signal(SIGINT, vut_sigint);
(void)signal(SIGTERM, vut_sigint);
(void)signal(SIGUSR1, vut_sigusr1);
/* Open PID file */
if (VUT.P_arg) {
AZ(VUT.pfh);
VUT.pfh = VPF_Open(VUT.P_arg, 0644, NULL);
if (VUT.pfh == NULL)
VUT_Error(1, "%s: %s", VUT.P_arg, strerror(errno));
}
/* Daemon mode */
if (VUT.D_opt && varnish_daemon(0, 0) == -1)
VUT_Error(1, "Daemon mode: %s", strerror(errno));
/* Write PID and setup exit handler */
if (VUT.pfh != NULL) {
VPF_Write(VUT.pfh);
AZ(atexit(vut_vpf_remove));
}
}
