Implemented some entry functions

src/entry.c

@@ -1,10 +1,12 @@
 #include "entry.h"
 
 #include "utils.h"
+#include "disk.h"
 
 #include <stdlib.h>
 #include <string.h>
 #include <errno.h>
+#include <unistd.h>
 #include <sys/stat.h>
 
 bool is_entry_id_valid(const char* entry_id) {
@@ -62,3 +64,104 @@ Result entry_exists(const char* entry_id, bool* out_exists) {
 
 	return SUCCESS;
 }
+
+Result add_root_entry(const char* entry_id, uint64_t size) {
+	// Check that the entry does not exist
+	bool exists;
+	Result result = entry_exists(entry_id, &exists);
+	if (result != SUCCESS)
+		return result;
+
+	if (exists) {
+		log_message(LOG_LEVEL_ERROR, "Entry '%s' already exists.", entry_id);
+		return FAILURE;
+	}
+
+	// Get the path of the entry
+	char* path;
+	result = get_entry_path(entry_id, &path);
+	if (result != SUCCESS)
+		return result;
+
+	// Create the directory
+	int return_code = mkdir(path, 0755);
+
+	// Free the path as it is no longer needed
+	free(path);
+
+	// Check if the directory was created
+	if (return_code != 0) {
+		log_message(LOG_LEVEL_ERROR, "Failed to create the entry '%s' (%s).", entry_id, strerror(errno));
+		return FAILURE;
+	}
+
+	// Get the disk path
+	char* disk_path;
+	result = get_entry_disk_path(entry_id, &disk_path);
+	if (result != SUCCESS) {
+		remove_entry(entry_id);
+		return result;
+	}
+
+	// Create the disk
+	result = create_root_disk(disk_path, size, 0644);
+
+	// Free the disk path as it is no longer needed
+	free(disk_path);
+
+	// Remove the entry if the disk could not be created
+	if (result != SUCCESS) {
+		remove_entry(entry_id);
+		return result;
+	}
+
+	return SUCCESS;
+}
+
+Result remove_entry(const char* entry_id) {
+	// Remove the disk
+	char* disk_path;
+	Result result = get_entry_disk_path(entry_id, &disk_path);
+	if (result == SUCCESS) {
+		unlink(disk_path);
+		free(disk_path);
+	}
+
+	// Get the path of the entry
+	char* path;
+	result = get_entry_path(entry_id, &path);
+	if (result != SUCCESS)
+		return result;
+
+	// Remove the directory
+	int return_code = rmdir(path);
+
+	// Free the path as it is no longer needed
+	free(path);
+
+	// Check if the directory was removed
+	if (return_code != 0) {
+		log_message(LOG_LEVEL_ERROR, "Failed to remove the entry '%s' (%s).", entry_id, strerror(errno));
+		return FAILURE;
+	}
+
+	return SUCCESS;
+}
+
+Result get_entry_disk_path(const char* entry_id, char** out_path) {
+	*out_path = NULL;
+
+	// Get the path of the entry
+	char* path;
+	Result result = get_entry_path(entry_id, &path);
+	if (result != SUCCESS)
+		return result;
+
+	// Format the disk path
+	result = format(out_path, "%s/disk", path);
+
+	// Free the path as it is no longer needed
+	free(path);
+
+	return result;
+}