implementing argument parsing

src/cmd/uts-server.c

@@ -1,6 +1,67 @@
-int main()
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+#include <unistd.h>
+#include <getopt.h>
+#include <argp.h>
+#include <sys/syslog.h>
+
+const char *argp_program_version = UTS_VERSION;
+
+const char *argp_program_bug_address = "Pierre-Francois Carpentier <carpentier.pf@gmail.com>";
+
+static char doc[] = "\nUTS micro timestamp server (RFC 3161)";
+
+static struct argp_option options[] = {
+    {"conffile",   'c', "CONFFILE",   0, "Path to configuration file"},
+    {"daemonize",  'd', 0,            0, "Launch as a daemon"},
+    { 0 }
+};
+
+/* A description of the arguments we accept. */
+static char args_doc[] = "-c CONFFILE -d";
+
+struct arguments
 {
-    skeleton_daemon();
+    char *args[2];                /* arg1 & arg2 */
+    int  daemonize;
+    char *conffile;
+};
+
+static error_t parse_opt (int key, char *arg, struct argp_state *state)
+{
+    /* Get the input argument from argp_parse, which we
+       know is a pointer to our arguments structure. */
+    struct arguments *arguments = (struct arguments *)state->input;
+
+    switch (key)
+    {
+        case 'd':
+            arguments->daemonize   = 1;
+            break;
+        case 'c':
+            arguments->conffile   = arg;
+            break;
+        default:
+            return ARGP_ERR_UNKNOWN;
+    }
+    return 0;
+}
+
+/* Our argp parser. */
+static struct argp argp = { options, parse_opt, args_doc, doc };
+
+
+int main(int argc, char **argv)
+{
+
+    struct arguments args;
+    args.conffile  = NULL;
+    args.daemonize = 0;
+    argp_parse (&argp, argc, argv, 0, 0, &args);
+
+    //skeleton_daemon();
 
     while (1)
     {