1 files changed, 117 insertions, 0 deletions
diff --git a/config.c b/config.c
new file mode 100644
index 0000000..2913a4e
--- /dev/null
+++ b/config.c
@@ -0,0 +1,117 @@
+#include <sys/types.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <limits.h>
+#include <pwd.h>
+#include <stdlib.h>
+
+#include "config.h"
+
+void fix_config_file_owner(const char *config_path) {
+    char *sudo_uid_str = getenv("SUDO_UID");
+    char *sudo_gid_str = getenv("SUDO_GID");
+
+    if (sudo_uid_str && sudo_gid_str) {
+        uid_t original_uid = atoi(sudo_uid_str);
+        gid_t original_gid = atoi(sudo_gid_str);
+        
+        chown(config_path, original_uid, original_gid);
+    }
+}
+
+struct config* prepare_config_file() {
+    struct config* cfg = malloc(sizeof(struct config));
+    if (!cfg) {
+	return NULL;
+    }
+
+    char* sudo_user = getenv("SUDO_USER");
+    cfg->home = malloc(PATH_MAX);
+    if (!cfg->home) {
+	return NULL;
+    }
+
+    snprintf(cfg->home, PATH_MAX, "/home/%s", sudo_user);
+
+    cfg->config_file_path = malloc(strlen(cfg->home) + strlen("/.klrc"));
+
+    snprintf(cfg->config_file_path, PATH_MAX, "%s/.klrc", cfg->home);
+
+    if (access(cfg->config_file_path, F_OK) == -1) {
+	FILE* fp = fopen(cfg->config_file_path, "a");
+	if (!fp) {
+	    return NULL;
+	}
+	fputs(CONFIG_FILE_COMMENT, fp);
+	fix_config_file_owner(cfg->config_file_path);
+	printf("%s\n", cfg->config_file_path);
+	fclose(fp);
+    }
+    return cfg;
+}
+
+struct config* parese_config(struct config* cfg) {
+    if (!cfg) {
+	return NULL;
+    }
+
+    FILE* fp = fopen(cfg->config_file_path, "r");
+    if (!fp) {
+	return NULL;
+    }
+
+
+    int line_count = 0;
+    char line[128];
+    char key[64] = {0};
+    char val[64] = {0};
+
+    while (fgets(line, sizeof(line), fp)) {
+	line_count++;
+	/* Skip comment and blank lines */
+	if (line[0] == '#' || line[0] == '\n' || line[0] == '\r') {
+	    continue;
+	}
+
+	int count = sscanf(line, "%s = %s", key, val);
+	if (count != 2) {
+	    printf("Error at %s:%d\n invalid token: %s", cfg->config_file_path, line_count, line);
+	    return NULL;
+	}
+
+	if (CFG_COMPLETE(key, "device")) {
+	    strncpy(cfg->device, val, sizeof(cfg->device) - 1);
+	    cfg->device[sizeof(cfg->device) - 1] = '\0';
+	} else if (CFG_COMPLETE(key, "enable_time")) {
+	    if (CFG_COMPLETE(val, "true")) {
+		cfg->enable_time = true;
+	    } else {
+		cfg->enable_time = false;
+	    }
+	} else if (CFG_COMPLETE(key, "enable_key_counter")) {
+	    if (CFG_COMPLETE(val, "true")) {
+		cfg->enable_keys_counter = true;
+	    } else {
+		cfg->enable_keys_counter = false;
+	    }
+	}  
+    }
+
+    fclose(fp);
+
+    return cfg;
+}
+
+struct config* config_init() {
+    struct config *cfg = prepare_config_file();
+    if (!cfg) {
+	return NULL;
+    }
+
+    if (parese_config(cfg) == NULL)  {
+	return NULL;
+    }
+
+
+    return cfg;
+}