Add balloon program

This adds the balloon program, which balloons up in size immediately,
taking the specified amount of memory.

2 files changed, 52 insertions, 2 deletions

diff --git a/Makefile b/Makefile
index 554b146..a7669b5 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,10 @@
-all: memleak
+all: memleak balloon
 
 clean:
-	rm -vf memleak
+	rm -vf memleak balloon
 
 memleak:
 	cc --std=gnu99 -O2 -Wall src/memleak.c -o memleak
+
+balloon:
+	cc --std=gnu99 -O2 -Wall src/balloon.c -o balloon
diff --git a/src/balloon.c b/src/balloon.c
new file mode 100644
index 0000000..769af90
--- /dev/null
+++ b/src/balloon.c
@@ -0,0 +1,47 @@
+/**
+ * Balloon leaks the specified amount of memory all at once
+ * Copyright (C) 2022  Aaron Ball, nullspoon@oper.io
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <signal.h>
+#include <string.h>
+
+char* BUF;
+
+void handler(int sig) {
+  printf("\nFreeing memory\n");
+  free(BUF);
+  exit(128);
+}
+
+int main(int argc, char* argv[]) {
+  long max = 0;
+  signal(SIGINT, handler);
+
+  if(argc == 1) {
+    printf("Baloon memory amount required in MB\n");
+    return 1;
+  }
+  max = strtol(argv[1], NULL, 10) * 1024 * 1024;
+  printf("Allocating %s MB of space\n", argv[1]);
+
+  BUF = malloc(max);
+  memset(BUF, 1, max);
+  printf("Done. Press Ctrl+c to free memory.\n");
+  pause();
+}