Initial version.

src/nxt_log.c

@@ -0,0 +1,112 @@
+
+/*
+ * Copyright (C) Igor Sysoev
+ * Copyright (C) NGINX, Inc.
+ */
+
+#include <nxt_main.h>
+
+
+nxt_uint_t  nxt_debug;
+
+nxt_log_t   nxt_main_log = {
+    NXT_LOG_INFO,
+    0,
+    nxt_log_handler,
+    NULL,
+    NULL
+};
+
+
+nxt_str_t  nxt_log_levels[8] = {
+    nxt_string("emerg"),
+    nxt_string("alert"),
+    nxt_string("crit"),
+    nxt_string("error"),
+    nxt_string("warn"),
+    nxt_string("notice"),
+    nxt_string("info"),
+    nxt_string("debug")
+};
+
+
+static const u_char  *nxt_log_prefix;
+
+
+void
+nxt_log_start(const char *prefix)
+{
+    if (prefix != NULL && *prefix != '\0') {
+        nxt_log_prefix = (u_char *) prefix;
+    }
+}
+
+
+/* STUB */
+nxt_log_t *
+nxt_log_set_ctx(nxt_log_t *log, nxt_log_ctx_handler_t handler, void *ctx)
+{
+    nxt_log_t     *old;
+    nxt_thread_t  *thr;
+
+    thr = nxt_thread();
+    old = thr->log;
+
+    log->level = old->level;
+    log->handler = old->handler;
+    log->ctx_handler = handler;
+    log->ctx = ctx;
+
+    thr->log = log;
+
+    return old;
+}
+
+
+void nxt_cdecl
+nxt_log_handler(nxt_uint_t level, nxt_log_t *log, const char *fmt, ...)
+{
+    u_char   *p, *syslogmsg, *end;
+    va_list  args;
+    u_char   msg[NXT_MAX_ERROR_STR];
+
+    p = msg;
+    end = msg + NXT_MAX_ERROR_STR;
+
+    if (nxt_log_prefix != NULL) {
+        p = nxt_cpystrn(p, nxt_log_prefix, end - p);
+        *p++ = ':';
+        *p++ = ' ';
+    }
+
+    syslogmsg = p;
+
+    p = nxt_sprintf(p, end, (log->ident != 0) ? "[%V] *%D " : "[%V] ",
+                    &nxt_log_levels[level], log->ident);
+
+    va_start(args, fmt);
+    p = nxt_vsprintf(p, end, fmt, args);
+    va_end(args);
+
+    if (level != NXT_LOG_DEBUG && log->ctx_handler != NULL) {
+        p = log->ctx_handler(log->ctx, p, end);
+    }
+
+    if (p > end - NXT_LINEFEED_SIZE) {
+        p = end - NXT_LINEFEED_SIZE;
+    }
+
+    nxt_linefeed(p);
+
+    (void) nxt_write_console(nxt_stderr, msg, p - msg);
+
+    if (level <= NXT_LOG_ALERT) {
+        *(p - NXT_LINEFEED_SIZE) = '\0';
+
+        /*
+         * Syslog LOG_ALERT level is enough, because
+         * LOG_EMERG level broadcast a message to all users.
+         */
+        nxt_write_syslog(LOG_ALERT, syslogmsg);
+    }
+}