caod: imported basics for websocket management

Signed-off-by: Olivier Gayot <duskcoder@gmail.com>

1 files changed, 109 insertions, 0 deletions

diff --git a/log.c b/log.c
new file mode 100644
index 0000000..bae3fb5
--- /dev/null
+++ b/log.c
@@ -0,0 +1,109 @@
+/*
+ * Copyright (C) 2014-2016
+ *     Olivier Gayot <ogayot@baylibre.com>
+ *     Bartosz Golaszewski <bgolaszewski@baylibre.com>
+ *     Olivier Gayot <olivier.gayot@sigexec.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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 <stdio.h>
+#include <stdarg.h>
+#include <unistd.h>
+#include <string.h>
+#include <stdlib.h>
+
+#include <libwebsockets.h>
+
+#include "log.h"
+
+#define PRINT_FROM_VA(STREAM, LVL, FMT) \
+    do { \
+        va_list va; \
+        va_start(va, FMT); \
+        fprintf(STREAM, "caod ["LVL"] PID: %d\t", getpid()); \
+        vfprintf(STREAM, FMT, va); \
+        fprintf(STREAM, "\n"); \
+        va_end(va); \
+    } while (0)
+
+static const char* const logpath = "/tmp/caod.log";
+static FILE* logfd;
+
+static void close_log(void)
+{
+    fclose(logfd);
+}
+
+void caod_setup_logs(void)
+{
+    (void)unlink(logpath);
+    logfd = fopen(logpath, "w");
+    if (logfd)
+        atexit(&close_log);
+}
+
+void caod_info(const char *fmt, ...)
+{
+    PRINT_FROM_VA(stdout, "INFO", fmt);
+    if (logfd) {
+        PRINT_FROM_VA(logfd, "INFO", fmt);
+    }
+}
+
+void caod_warn(const char *fmt, ...)
+{
+    PRINT_FROM_VA(stdout, "WARN", fmt);
+    if (logfd) {
+        PRINT_FROM_VA(logfd, "WARN", fmt);
+    }
+}
+
+void caod_err(const char *fmt, ...)
+{
+    PRINT_FROM_VA(stdout, "ERR", fmt);
+    if (logfd) {
+        PRINT_FROM_VA(logfd, "ERR", fmt);
+    }
+}
+
+void caod_log_hook(int level, const char *line)
+{
+    char buf[256];
+    int last;
+
+    memset(buf, 0, sizeof(buf));
+    strncpy(buf, line, sizeof(buf));
+    last = strlen(buf)-1;
+    if (buf[last] == '\n') {
+        buf[last] = '\0';
+    }
+
+    switch (level) {
+        case LLL_DEBUG:
+        case LLL_INFO:
+        case LLL_NOTICE:
+            caod_info("%s", buf);
+            break;
+        case LLL_WARN:
+            caod_warn("%s", buf);
+            break;
+        case LLL_ERR:
+            caod_err("%s", buf);
+            break;
+        default:
+            break;
+    }
+}