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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/* Cherokee
*
* Authors:
* Alvaro Lopez Ortega <alvaro@alobbs.com>
*
* Copyright (C) 2001-2011 Alvaro Lopez Ortega
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of version 2 of the GNU General Public
* License as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*/
#include "common-internal.h"
#include "trace.h"
#include "buffer.h"
#include "util.h"
#include "bogotime.h"
#include "access.h"
#include "socket.h"
#include "request-protected.h"
#ifdef HAVE_SYSLOG_H
# include <syslog.h>
#endif
typedef struct {
cherokee_buffer_t modules;
cherokee_boolean_t use_syslog;
cherokee_boolean_t print_time;
cherokee_boolean_t print_thread;
cherokee_access_t *from_filter;
} cherokee_trace_t;
static cherokee_trace_t trace = {
CHEROKEE_BUF_INIT,
false,
false,
false,
NULL
};
/* cherokee_trace_do_trace() calls complex functions that might do
* some tracing as well, and that would generate a loop. This flag is
* used to disable the tracing while a previous trace call is ongoin.
*/
static cherokee_boolean_t disabled = false;
ret_t
cherokee_trace_init (void)
{
const char *env;
cherokee_buffer_t tmp = CHEROKEE_BUF_INIT;
/* Read the environment variable
*/
env = getenv (TRACE_ENV);
if (env == NULL)
return ret_ok;
/* Set it up
*/
cherokee_buffer_fake (&tmp, env, strlen(env));
cherokee_trace_set_modules (&tmp);
return ret_ok;
}
ret_t
cherokee_trace_set_modules (cherokee_buffer_t *modules)
{
ret_t ret;
char *p;
char *end;
cherokee_buffer_t tmp = CHEROKEE_BUF_INIT;
/* Store a copy of the modules
*/
cherokee_buffer_clean (&trace.modules);
if (trace.from_filter != NULL) {
cherokee_access_free (trace.from_filter);
}
trace.from_filter = NULL;
if (cherokee_buffer_case_cmp_str (modules, "none") != 0) {
cherokee_buffer_add_buffer (&trace.modules, modules);
}
/* Check the special properties
*/
trace.use_syslog = (strstr (modules->buf, "syslog") != NULL);
trace.print_time = (strstr (modules->buf, "time") != NULL);
trace.print_thread = (strstr (modules->buf, "thread") != NULL);
/* Even a more special 'from' property
*/
p = strstr (modules->buf, "from=");
if (p != NULL) {
p += 5;
end = strchr(p, ',');
if (end == NULL) {
end = p + strlen(p);
}
if (end > p) {
ret = cherokee_access_new (&trace.from_filter);
if (ret != ret_ok) return ret_error;
cherokee_buffer_add (&tmp, p, end-p);
ret = cherokee_access_add (trace.from_filter, tmp.buf);
if (ret != ret_ok) {
ret = ret_error;
goto out;
}
}
}
ret = ret_ok;
out:
cherokee_buffer_mrproper (&tmp);
return ret;
}
void
cherokee_trace_do_trace (const char *entry, const char *file, int line, const char *func, const char *fmt, ...)
{
ret_t ret;
char *p;
char *lentry;
char *lentry_end;
va_list args;
cherokee_connection_t *conn;
cherokee_buffer_t *trace_modules = &trace.modules;
cherokee_boolean_t do_log = false;
cherokee_buffer_t entries = CHEROKEE_BUF_INIT;
/* Prevents loops
*/
if (disabled) {
return;
}
disabled = true;
/* Return ASAP if nothing is being traced
*/
if (cherokee_buffer_is_empty (&trace.modules)) {
goto out;
}
/* Check the connection source, if possible
*/
if (trace.from_filter != NULL) {
conn = CONN (CHEROKEE_THREAD_PROP_GET (thread_connection_ptr));
/* No conn, no trace entry
*/
if (conn == NULL) {
goto out;
}
if (conn->socket.socket < 0) {
goto out;
}
/* Skip the trace if the conn doesn't match
*/
ret = cherokee_access_ip_match (trace.from_filter, &conn->socket);
if (ret != ret_ok) {
goto out;
}
}
/* Also, check for 'all'
*/
p = strstr (trace_modules->buf, "all");
if (p == NULL) {
/* Parse the In-code module string
*/
cherokee_buffer_add (&entries, entry, strlen(entry));
for (lentry = entries.buf;;) {
lentry_end = strchr (lentry, ',');
if (lentry_end) *lentry_end = '\0';
/* Check the type
*/
p = strstr (trace_modules->buf, lentry);
if (p) {
char *tmp = p + strlen(lentry);
if ((*tmp == '\0') || (*tmp == ',') || (*tmp == ' '))
do_log = true;
}
if ((lentry_end == NULL) || (do_log))
break;
lentry = lentry_end + 1;
}
/* Return if trace entry didn't match with the configured list
*/
if (! do_log) {
goto out;
}
}
/* Format the message and log it:
* 'entries' is not needed at this stage, reuse it
*/
cherokee_buffer_clean (&entries);
if (trace.print_thread) {
int len;
char tmp[32+1];
static int longest_len = 0;
len = snprintf (tmp, 32+1, "%llX", (unsigned long long) CHEROKEE_THREAD_SELF);
longest_len = MAX (longest_len, len);
cherokee_buffer_add_str (&entries, "{0x");
cherokee_buffer_add_char_n (&entries, '0', longest_len - len);
cherokee_buffer_add (&entries, tmp, len);
cherokee_buffer_add_str (&entries, "} ");
}
if (trace.print_time) {
cherokee_buffer_add_char (&entries, '[');
cherokee_buf_add_bogonow (&entries, true);
cherokee_buffer_add_str (&entries, "] ");
}
cherokee_buffer_add_va (&entries, "%18s:%04d (%30s): ", file, line, func);
va_start (args, fmt);
cherokee_buffer_add_va_list (&entries, (char *)fmt, args);
va_end (args);
if (trace.use_syslog) {
cherokee_syslog (LOG_DEBUG, &entries);
} else {
#ifdef HAVE_FLOCKFILE
flockfile (stdout);
#endif
fprintf (stdout, "%s", entries.buf);
#ifdef HAVE_FUNLOCKFILE
funlockfile (stdout);
#endif
}
out:
cherokee_buffer_mrproper (&entries);
disabled = false;
}
ret_t
cherokee_trace_get_trace (cherokee_buffer_t **buf_ref)
{
if (buf_ref == NULL)
return ret_not_found;
*buf_ref = &trace.modules;
return ret_ok;
}
int
cherokee_trace_is_tracing (void)
{
return (! cherokee_buffer_is_empty (&trace.modules));
}
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