level08: source code done

level08/source.c

@@ -0,0 +1,57 @@
+#include <fcntl.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+void log_wrapper(FILE *f, const char *s, const char *buff)
+{
+	char dest[264];
+
+	strcpy(dest, s);
+	snprintf(&dest[strlen(dest)], 254 - strlen(dest), buff);
+	dest[strcspn(dest, "\n")] = '\0';
+	fprintf(f, "LOG: %s\n", dest);
+}
+
+int main(int argc, const char **argv, const char **envp)
+{
+	FILE *log;
+	FILE *stream;
+	int fd;
+	char buf;
+	char dest[104];
+
+	buf = -1;
+	if (argc != 2)
+		printf("Usage: %s filename\n", *argv);
+	log = fopen("./backups/.log", "w");
+	if (!log) {
+		printf("ERROR: Failed to open %s\n", "./backups/.log");
+		exit(1);
+	}
+	log_wrapper(log, "Starting back up: ", argv[1]);
+	stream = fopen(argv[1], "r");
+	if (!stream) {
+		printf("ERROR: Failed to open %s\n", argv[1]);
+		exit(1);
+	}
+	strcpy(dest, "./backups/");
+	strncat(dest, argv[1], 99 - strlen(dest));
+	fd = open(dest, O_CREAT | O_WRONLY | O_EXCL, 0660);
+	if (fd < 0) {
+		printf("ERROR: Failed to open %s%s\n", "./backups/", argv[1]);
+		exit(1);
+	}
+	while (1) {
+		buf = fgetc(stream);
+		if (buf == -1)
+			break;
+		write(fd, &buf, 1);
+	}
+	log_wrapper(log, "Finished back up ", argv[1]);
+	fclose(stream);
+	close(fd);
+	return 0;
+}