tests: Portability fixes, replaced 0/1/-1 return codes with macros

tests/stdlib/a64l.c

@@ -6,7 +6,7 @@ int main(void) {
     long l = a64l(s);
     if (l != 194301926) {
         printf("Invalid result: a64l(%s) = %ld\n", s, l);
-        return 1;
+        return EXIT_FAILURE;
     }
     printf("Correct a64l: %s = %ld\n", s, l);
 
@@ -15,8 +15,8 @@ int main(void) {
     l = a64l(s);
     if (l != 53222) {
         printf("Invalid result: a64l(%s) = %ld\n", s, l);
-        return 1;
+        return EXIT_FAILURE;
     }
     printf("Correct a64l: %s = %ld\n", s, l);
-    return 0;
+    return EXIT_SUCCESS;
 }

tests/stdlib/alloc.c

@@ -25,5 +25,5 @@ int main(void) {
     }
     free(ptra);
 
-    return 0;
+    return EXIT_SUCCESS;
 }

tests/stdlib/atof.c

@@ -4,5 +4,5 @@
 int main(void) {
     double d = atof("-3.14");
     printf("%f\n", d);
-    return 0;
+    return EXIT_SUCCESS;
 }

tests/stdlib/atoi.c

@@ -8,5 +8,5 @@ int main(void) {
     printf("%ld\n", atol("         -42"));
     printf("%ld\n", atol(" +555"));
     printf("%ld\n", atol("   1234567890    "));
-    return 0;
+    return EXIT_SUCCESS;
 }

tests/stdlib/bsearch.c

@@ -13,7 +13,7 @@ int int_cmp(const void* a, const void* b) {
       size_t i = 0; \
       for (; i < len; ++i) printf("%d,", arr[i]); \
       printf("] expected %p but got %p\n", (void*) expect, res); \
-      return 1; \
+      return EXIT_FAILURE; \
     } \
   } while (0);
 
@@ -53,5 +53,5 @@ int main(void) {
   BSEARCH_TEST_INT(x, big, 7, NULL);
 
   printf("PASS bsearch\n");
-  return 0;
+  return EXIT_SUCCESS;
 }

tests/stdlib/div.c

@@ -18,6 +18,6 @@ int main(void) {
          _Exit(0);
 
   ;
-  return 0;
+  return EXIT_SUCCESS;
 }
 

tests/stdlib/env.c

@@ -34,7 +34,7 @@ int main(void) {
     if (env) {
         puts("This should be null, but isn't");
         puts(env);
-        return 1;
+        return EXIT_FAILURE;
     } else {
         puts("Value deleted successfully!");
     }

tests/stdlib/mkostemps.c

@@ -23,5 +23,5 @@ int main(void) {
     }
     fclose(fp);
     remove(file_name);
-    return 0;
+    return EXIT_SUCCESS;
 }

tests/stdlib/mktemp.c

@@ -8,5 +8,5 @@ int main(void) {
     mktemp(string);
     printf("%s\n",string);
     free(string);
-    return 0;
+    return EXIT_SUCCESS;
 }

tests/stdlib/realpath.c

@@ -8,7 +8,7 @@ int main(void) {
     char* path = realpath("stdlib/realpath.c", NULL);
     if (!path) {
         perror("realpath");
-        return -1;
+        return EXIT_FAILURE;
     }
     puts(path);
 
@@ -21,7 +21,7 @@ int main(void) {
     if (!path) {
         perror("realpath");
         free(path);
-        return -1;
+        return EXIT_FAILURE;
     }
     puts(path);
 

tests/stdlib/strtol.c

@@ -27,5 +27,5 @@ int main(void) {
         printf("errno is not 0 (%d), something went wrong\n", errno);
     }
 
-    return 0;
+    return EXIT_SUCCESS;
 }

tests/stdlib/strtoul.c

@@ -26,5 +26,5 @@ int main(void) {
         printf("errno is not 0 (%d), something went wrong\n", errno);
     }
 
-    return 0;
+    return EXIT_SUCCESS;
 }

tests/stdlib/system.c

@@ -2,5 +2,5 @@
 
 int main(void) {
     system("echo test of system");
-    return 0;
+    return EXIT_SUCCESS;
 }