Add error handling to oxfstool insert

src/ox/fs/oxfstool.cpp

@@ -18,6 +18,7 @@ const char *usage = "usage:\n"
 
 char *loadFileBuff(const char *path, ::size_t *sizeOut = nullptr) {
 	FILE *file = fopen(path, "rw");
+	if (file) {
 		fseek(file, 0, SEEK_END);
 		const auto size = ftell(file);
 		auto buff = (char*) malloc(size);
@@ -27,6 +28,9 @@ char *loadFileBuff(const char *path, ::size_t *sizeOut = nullptr) {
 			*sizeOut = size;
 		}
 		return buff;
+	} else {
+		return nullptr;
+	}
 }
 
 int format(int argc, char **args) {
@@ -82,6 +86,7 @@ int write(int argc, char **args) {
 		::size_t srcSize;
 
 		FILE *fsFile = fopen(fsPath, "rw");
+		if (fsFile) {
 			fseek(fsFile, 0, SEEK_END);
 
 			const auto fsSize = ftell(fsFile);
@@ -89,22 +94,45 @@ int write(int argc, char **args) {
 			fread(fs, fsSize, 1, fsFile);
 
 			auto srcBuff = loadFileBuff(srcPath, &srcSize);
-
+			if (srcBuff) {
 				auto type = *((ox::std::uint32_t*) fs);
 				switch (type) {
 					case ox::fs::OxFS16:
-				((FileStore16*) fs)->write(inode, srcBuff, srcSize);
+						err |= ((FileStore16*) fs)->write(inode, srcBuff, srcSize);
 						break;
 					case ox::fs::OxFS32:
-				((FileStore32*) fs)->write(inode, srcBuff, srcSize);
+						err |= ((FileStore32*) fs)->write(inode, srcBuff, srcSize);
 						break;
 					case ox::fs::OxFS64:
-				((FileStore64*) fs)->write(inode, srcBuff, srcSize);
+						err |= ((FileStore64*) fs)->write(inode, srcBuff, srcSize);
 						break;
 				}
+			} else {
+				err = 1;
+				fprintf(stderr, "Could not load source file.\n");
+			}
+
+			if (err) {
+				fprintf(stderr, "Could not write to file system.\n");
+				err = 0;
+			} else {
+				err = fwrite(fs, fsSize, 1, fsFile);
+				if (err) {
+					fprintf(stderr, "Could not write to file system.\n");
+				}
+			}
 
-		fwrite(fs, fsSize, 1, fsFile);
 			err = fclose(fsFile);
+
+			if (err) {
+				fprintf(stderr, "Could not write to file system file.\n");
+			}
+
+			free(fs);
+			free(srcBuff);
+		} else {
+			fprintf(stderr, "Could not open file system\n");
+		}
 	}
 	return err;
 }