- use EXIT_{SUCCESS,FAILURE}. No object-code changes

coreutils/cal.c

@@ -179,7 +179,7 @@ int cal_main(int argc, char **argv)
 		}
 	}
 
-	fflush_stdout_and_exit(0);
+	fflush_stdout_and_exit(EXIT_SUCCESS);
 }
 
 /*

coreutils/env.c

@@ -85,7 +85,7 @@ int env_main(int argc ATTRIBUTE_UNUSED, char **argv)
 		puts(*ep);
 	}
 
-	fflush_stdout_and_exit(0);
+	fflush_stdout_and_exit(EXIT_SUCCESS);
 }
 
 /*

coreutils/printenv.c

@@ -29,5 +29,5 @@ int printenv_main(int argc ATTRIBUTE_UNUSED, char **argv)
 		}
 	}
 
-	fflush_stdout_and_exit(0);
+	fflush_stdout_and_exit(EXIT_SUCCESS);
 }

coreutils/printf.c

@@ -266,7 +266,7 @@ static char **print_formatted(char *format, char **argv)
 			break;
 		case '\\':
 			if (*++f == 'c')
-				exit(0);
+				exit(EXIT_SUCCESS);
 			bb_putchar(bb_process_escape_sequence((const char **)&f));
 			f--;
 			break;