diff --git a/libsparse/append2simg.cpp b/libsparse/append2simg.cpp
index 99f4339..d3a43a8 100644
--- a/libsparse/append2simg.cpp
+++ b/libsparse/append2simg.cpp
@@ -64,60 +64,60 @@
     input_path = argv[2];
   } else {
     usage();
-    exit(-1);
+    exit(EXIT_FAILURE);
   }
 
   ret = asprintf(&tmp_path, "%s.append2simg", output_path);
   if (ret < 0) {
     fprintf(stderr, "Couldn't allocate filename\n");
-    exit(-1);
+    exit(EXIT_FAILURE);
   }
 
   output = open(output_path, O_RDWR | O_BINARY);
   if (output < 0) {
     fprintf(stderr, "Couldn't open output file (%s)\n", strerror(errno));
-    exit(-1);
+    exit(EXIT_FAILURE);
   }
 
   sparse_output = sparse_file_import_auto(output, false, true);
   if (!sparse_output) {
     fprintf(stderr, "Couldn't import output file\n");
-    exit(-1);
+    exit(EXIT_FAILURE);
   }
 
   input = open(input_path, O_RDONLY | O_BINARY);
   if (input < 0) {
     fprintf(stderr, "Couldn't open input file (%s)\n", strerror(errno));
-    exit(-1);
+    exit(EXIT_FAILURE);
   }
 
   input_len = lseek64(input, 0, SEEK_END);
   if (input_len < 0) {
     fprintf(stderr, "Couldn't get input file length (%s)\n", strerror(errno));
-    exit(-1);
+    exit(EXIT_FAILURE);
   } else if (input_len % sparse_output->block_size) {
     fprintf(stderr, "Input file is not a multiple of the output file's block size");
-    exit(-1);
+    exit(EXIT_FAILURE);
   }
   lseek64(input, 0, SEEK_SET);
 
   output_block = sparse_output->len / sparse_output->block_size;
   if (sparse_file_add_fd(sparse_output, input, 0, input_len, output_block) < 0) {
     fprintf(stderr, "Couldn't add input file\n");
-    exit(-1);
+    exit(EXIT_FAILURE);
   }
   sparse_output->len += input_len;
 
   tmp_fd = open(tmp_path, O_WRONLY | O_CREAT | O_BINARY, 0664);
   if (tmp_fd < 0) {
     fprintf(stderr, "Couldn't open temporary file (%s)\n", strerror(errno));
-    exit(-1);
+    exit(EXIT_FAILURE);
   }
 
   lseek64(output, 0, SEEK_SET);
   if (sparse_file_write(sparse_output, tmp_fd, false, true, false) < 0) {
     fprintf(stderr, "Failed to write sparse file\n");
-    exit(-1);
+    exit(EXIT_FAILURE);
   }
 
   sparse_file_destroy(sparse_output);
@@ -128,10 +128,10 @@
   ret = rename(tmp_path, output_path);
   if (ret < 0) {
     fprintf(stderr, "Failed to rename temporary file (%s)\n", strerror(errno));
-    exit(-1);
+    exit(EXIT_FAILURE);
   }
 
   free(tmp_path);
 
-  exit(0);
+  exit(EXIT_SUCCESS);
 }
diff --git a/libsparse/img2simg.cpp b/libsparse/img2simg.cpp
index 51580f7..c390506 100644
--- a/libsparse/img2simg.cpp
+++ b/libsparse/img2simg.cpp
@@ -61,14 +61,14 @@
         break;
       default:
         usage();
-        exit(-1);
+        exit(EXIT_FAILURE);
     }
   }
 
   extra = argc - optind;
   if (extra < 2 || extra > 3) {
     usage();
-    exit(-1);
+    exit(EXIT_FAILURE);
   }
 
   if (extra == 3) {
@@ -77,7 +77,7 @@
 
   if (block_size < 1024 || block_size % 4 != 0) {
     usage();
-    exit(-1);
+    exit(EXIT_FAILURE);
   }
 
   arg_in = argv[optind];
@@ -87,7 +87,7 @@
     in = open(arg_in, O_RDONLY | O_BINARY);
     if (in < 0) {
       fprintf(stderr, "Cannot open input file %s\n", arg_in);
-      exit(-1);
+      exit(EXIT_FAILURE);
     }
   }
 
@@ -98,7 +98,7 @@
     out = open(arg_out, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, 0664);
     if (out < 0) {
       fprintf(stderr, "Cannot open output file %s\n", arg_out);
-      exit(-1);
+      exit(EXIT_FAILURE);
     }
   }
 
@@ -108,24 +108,24 @@
   s = sparse_file_new(block_size, len);
   if (!s) {
     fprintf(stderr, "Failed to create sparse file\n");
-    exit(-1);
+    exit(EXIT_FAILURE);
   }
 
   sparse_file_verbose(s);
   ret = sparse_file_read(s, in, mode, false);
   if (ret) {
     fprintf(stderr, "Failed to read file\n");
-    exit(-1);
+    exit(EXIT_FAILURE);
   }
 
   ret = sparse_file_write(s, out, false, true, false);
   if (ret) {
     fprintf(stderr, "Failed to write sparse file\n");
-    exit(-1);
+    exit(EXIT_FAILURE);
   }
 
   close(in);
   close(out);
 
-  exit(0);
+  exit(EXIT_SUCCESS);
 }
diff --git a/libsparse/simg2img.cpp b/libsparse/simg2img.cpp
index 8ba5f69..2301a83 100644
--- a/libsparse/simg2img.cpp
+++ b/libsparse/simg2img.cpp
@@ -41,13 +41,13 @@
 
   if (argc < 3) {
     usage();
-    exit(-1);
+    exit(EXIT_FAILURE);
   }
 
   out = open(argv[argc - 1], O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, 0664);
   if (out < 0) {
     fprintf(stderr, "Cannot open output file %s\n", argv[argc - 1]);
-    exit(-1);
+    exit(EXIT_FAILURE);
   }
 
   for (i = 1; i < argc - 1; i++) {
@@ -57,14 +57,14 @@
       in = open(argv[i], O_RDONLY | O_BINARY);
       if (in < 0) {
         fprintf(stderr, "Cannot open input file %s\n", argv[i]);
-        exit(-1);
+        exit(EXIT_FAILURE);
       }
     }
 
     s = sparse_file_import(in, true, false);
     if (!s) {
       fprintf(stderr, "Failed to read sparse file\n");
-      exit(-1);
+      exit(EXIT_FAILURE);
     }
 
     if (lseek(out, 0, SEEK_SET) == -1) {
@@ -74,7 +74,7 @@
 
     if (sparse_file_write(s, out, false, false, false) < 0) {
       fprintf(stderr, "Cannot write output file\n");
-      exit(-1);
+      exit(EXIT_FAILURE);
     }
     sparse_file_destroy(s);
     close(in);
@@ -82,5 +82,5 @@
 
   close(out);
 
-  exit(0);
+  exit(EXIT_SUCCESS);
 }
diff --git a/libsparse/simg2simg.cpp b/libsparse/simg2simg.cpp
index 138173b..72483c1 100644
--- a/libsparse/simg2simg.cpp
+++ b/libsparse/simg2simg.cpp
@@ -49,7 +49,7 @@
 
   if (argc != 4) {
     usage();
-    exit(-1);
+    exit(EXIT_FAILURE);
   }
 
   max_size = atoll(argv[3]);
@@ -57,55 +57,55 @@
   in = open(argv[1], O_RDONLY | O_BINARY);
   if (in < 0) {
     fprintf(stderr, "Cannot open input file %s\n", argv[1]);
-    exit(-1);
+    exit(EXIT_FAILURE);
   }
 
   s = sparse_file_import(in, true, false);
   if (!s) {
     fprintf(stderr, "Failed to import sparse file\n");
-    exit(-1);
+    exit(EXIT_FAILURE);
   }
 
   files = sparse_file_resparse(s, max_size, nullptr, 0);
   if (files < 0) {
     fprintf(stderr, "Failed to resparse\n");
-    exit(-1);
+    exit(EXIT_FAILURE);
   }
 
   out_s = (struct sparse_file**)calloc(sizeof(struct sparse_file*), files);
   if (!out_s) {
     fprintf(stderr, "Failed to allocate sparse file array\n");
-    exit(-1);
+    exit(EXIT_FAILURE);
   }
 
   files = sparse_file_resparse(s, max_size, out_s, files);
   if (files < 0) {
     fprintf(stderr, "Failed to resparse\n");
-    exit(-1);
+    exit(EXIT_FAILURE);
   }
 
   for (i = 0; i < files; i++) {
     ret = snprintf(filename, sizeof(filename), "%s.%d", argv[2], i);
     if (ret >= (int)sizeof(filename)) {
       fprintf(stderr, "Filename too long\n");
-      exit(-1);
+      exit(EXIT_FAILURE);
     }
 
     out = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, 0664);
     if (out < 0) {
       fprintf(stderr, "Cannot open output file %s\n", argv[2]);
-      exit(-1);
+      exit(EXIT_FAILURE);
     }
 
     ret = sparse_file_write(out_s[i], out, false, true, false);
     if (ret) {
       fprintf(stderr, "Failed to write sparse file\n");
-      exit(-1);
+      exit(EXIT_FAILURE);
     }
     close(out);
   }
 
   close(in);
 
-  exit(0);
+  exit(EXIT_SUCCESS);
 }