syslog

syslog/Makefile

@@ -0,0 +1,14 @@
+CC = gcc
+CFLAGS = -Wall -Wextra -O2
+
+TARGET = main.elf
+SRC = main.c
+
+#LDFLAGS =
+
+$(TARGET): $(SRC)
+	@echo CC $@
+	@$(CC) $(CFLAGS) -o $@ $^ $(LDFLAGS)
+
+clean:
+	rm -f $(TARGET)

syslog/main.c

@@ -0,0 +1,24 @@
+#include <stdlib.h>
+#include <syslog.h>
+
+/*
+ * For unix systems:
+ *      tail /var/log/messages
+ *
+ * For systems using systemd:
+ *      journalctl -t my_daemon
+ */
+
+#define NAME "my_program"
+
+int main(void) {
+    /* LOG_PID ,LOG_CONS ,LOG_ODELAY ,LOG_NDELAY ,LOG_NOWAIT ,LOG_PERROR */
+    openlog(NAME, LOG_PID | LOG_CONS, LOG_USER);
+
+    /* LOG_EMERG, LOG_ALERT, LOG_CRIT, LOG_ERR, LOG_WARNING, LOG_NOTICE, LOG_INFO, LOG_DEBUG */
+    syslog(LOG_INFO, "Hello, log!");
+    syslog(LOG_INFO, "Formatting works %s!", "as well");
+
+    closelog();
+    return EXIT_SUCCESS;
+}