Discarded some code that does not work well with the needs

src/backing.c

@@ -1,163 +0,0 @@
-#include "backing.h"
-
-#include "utils.h"
-
-#include <stdbool.h>
-#include <string.h>
-#include <unistd.h>
-#include <stdlib.h>
-#include <dirent.h>
-#include <sys/stat.h>
-
-bool is_valid_backing_name(const char* name) {
-	if (name == NULL)
-		return false;
-
-	size_t len = strlen(name);
-	if (len == 0)
-		return false;
-
-	for (size_t i = 0; i < len; i++)
-		if (name[i] == '/')
-			return false;
-
-	if (name[0] < '0' || name[0] > '9')
-		return false;
-
-	return true;
-}
-
-char* get_backing_path(const char* name) {
-	if (name == NULL)
-		return NULL;
-
-	return format("%s/%s", "/var/lib/sandbox/backings", name); // TODO: Use a setting for the backings directory
-}
-
-bool backing_exists(const char* name) {
-	if (name == NULL)
-		return false;
-
-	char* path = get_backing_path(name);
-	if (path == NULL)
-		return false;
-
-	// Check if the backing exists
-	struct stat st;
-	if (stat(path, &st) != 0) {
-		free(path);
-		return false;
-	}
-
-	// Free the path, as it is no longer needed
-	free(path);
-
-	if (!S_ISREG(st.st_mode))
-		return false;
-
-	return true;
-}
-
-char** list_backings(void) {
-	// Open the backings directory
-	DIR* dir = opendir("/var/lib/sandbox/backings"); // TODO: Use a setting for the backings directory
-	if (dir == NULL)
-		return NULL;
-
-	// Count the number of backings
-	size_t count = 0;
-	struct dirent* entry;
-	while ((entry = readdir(dir)) != NULL) {
-		if (is_valid_backing_name(entry->d_name))
-			count++;
-	}
-
-	// Allocate the array
-	char** backings = calloc(count + 1, sizeof(char*));
-	if (backings == NULL) {
-		closedir(dir);
-		return NULL;
-	}
-
-	// Reset the directory stream
-	rewinddir(dir);
-
-	// Fill the array
-	size_t i = 0;
-	while ((entry = readdir(dir)) != NULL) {
-		if (is_valid_backing_name(entry->d_name)) {
-			backings[i] = strdup(entry->d_name);
-			if (backings[i] == NULL) {
-				closedir(dir);
-
-				for (size_t j = 0; j < i; j++)
-					free(backings[j]);
-				free(backings);
-
-				return NULL;
-			}
-			i++;
-		}
-	}
-
-	// Close the directory
-	closedir(dir);
-
-	// Terminate the array
-	backings[count] = NULL;
-
-	return backings;
-}
-
-time_t get_backing_ctime(const char* name) {
-	// As the name starts with the ctime, we can just convert the first part of the name to a time_t
-	size_t len = strlen(name);
-	size_t ctime_len = 0;
-	for (size_t i = 0; i < len; i++) {
-		if (name[i] < '0' || name[i] > '9')
-			break;
-
-		ctime_len++;
-	}
-
-	char* ctime_str = strndup(name, ctime_len);
-	if (ctime_str == NULL)
-		return 0;
-
-	time_t ctime = (time_t)strtoull(ctime_str, NULL, 10);
-
-	free(ctime_str);
-
-	return ctime;
-}
-
-char* get_latest_backing(void) {
-	// Get the backings
-	char** backings = list_backings();
-	if (backings == NULL)
-		return NULL;
-
-	// Find the latest backing
-	time_t latest_ctime = 0;
-	char* latest_backing = NULL;
-
-	for (size_t i = 0; backings[i] != NULL; i++) {
-		time_t ctime = get_backing_ctime(backings[i]);
-
-		if (ctime >= latest_ctime) {
-			latest_ctime = ctime;
-			latest_backing = backings[i];
-		}
-	}
-
-	// Duplicate the latest backing
-	if (latest_backing != NULL)
-		latest_backing = strdup(latest_backing);
-
-	// Free the backings
-	for (size_t i = 0; backings[i] != NULL; i++)
-		free(backings[i]);
-	free(backings);
-
-	return latest_backing;
-}