From 86b14eb4e0473360cd35163dfe2366f5c91384b3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Paulius=20Ratkevi=C4=8Dius?= <paulius.ratkevicius@ktu.edu>
Date: Fri, 17 May 2019 15:29:11 +0300
Subject: daemon: semi-stub for config file handling.
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The daemon now load and somewhat parses the config files. It does
not do anything else with the data yet, that's a TODO.

Signed-off-by: Paulius Ratkevičius <paulius.ratkevicius@ktu.edu>
---
 src/daemon/settings.c         | 66 +++++++++++++++++++++++++++++++++++++++++++
 src/daemon/settings_private.h |  2 ++
 2 files changed, 68 insertions(+)

diff --git a/src/daemon/settings.c b/src/daemon/settings.c
index 4392300..acbf40d 100644
--- a/src/daemon/settings.c
+++ b/src/daemon/settings.c
@@ -19,6 +19,14 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  */
 
+#define _GNU_SOURCE
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <string.h>
 #include "settings.h"
 #include "settings_private.h"
 
@@ -31,6 +39,7 @@ void settings_init(void)
 	unset_flag(flag_daemonize);
 	settings.port = 6996;
 	settings.verboselevel = USURP_VERBOSITY;
+	setting_readconf("./usurpation.conf");
 }
 
 int setting_detach(void)
@@ -68,3 +77,60 @@ void unset_flag(unsigned int flag)
 {
 	settings.flags &= ~flag;
 }
+
+/* TODO: semi-stub! */
+static int setting_readconf(const char * const path)
+{
+	struct stat filestat;
+	char *buf;
+	char *line;
+	char *entry;
+	char *value;
+	char *line_state;
+	char *token_state;
+	int fd;
+
+
+	if ((fd = open(path, O_RDONLY | O_NOATIME)) == -1) {
+		if (USURP_VERBOSITY >= 2) {
+			perror("error while opening the configuration file");
+			return 1;
+		}
+	}
+
+	fstat(fd, &filestat);
+	buf = malloc(filestat.st_size);
+
+	if (read(fd, buf, filestat.st_size) != filestat.st_size) {
+		if (USURP_VERBOSITY >= 2) {
+			perror("partial read of configuration file detected");
+			free(buf);
+			return 1;
+		}
+	}
+
+	line = strtok_r(buf, "\n", &line_state);
+
+	while (line) {
+		if (line[0] != '#') {
+			entry = strtok_r(line, "=", &token_state);
+			value = strtok_r(NULL, "=", &token_state);
+			setting_handle_config_entry(entry, value);
+		}
+
+		line = strtok_r(NULL, "\n", &line_state);
+	}
+
+	free(buf);
+
+	return 0;
+}
+
+/* TODO: stub! */
+static int setting_handle_config_entry(const char * const entry, const char * const value)
+{
+	printf( "key: %s\n"
+		"value: %s\n", entry, value);
+
+	return 0;
+}
diff --git a/src/daemon/settings_private.h b/src/daemon/settings_private.h
index ee49145..42c1fa5 100644
--- a/src/daemon/settings_private.h
+++ b/src/daemon/settings_private.h
@@ -37,5 +37,7 @@ static struct settings {
 int test_flag(unsigned int flag);
 void set_flag(unsigned int flag);
 void unset_flag(unsigned int flag);
+static int setting_readconf(const char * const path);
+static int setting_handle_config_entry(const char * const entry, const char * const value);
 
 #endif /* USURPATION_SETTINGS_PRIVATE_H */
-- 
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