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

shell/ash.c

@@ -4789,7 +4789,7 @@ openhere(union node *redir)
 			full_write(pip[1], redir->nhere.doc->narg.text, len);
 		else
 			expandhere(redir->nhere.doc, pip[1]);
-		_exit(0);
+		_exit(EXIT_SUCCESS);
 	}
  out:
 	close(pip[1]);

shell/ash_test/printenv.c

@@ -45,7 +45,7 @@ main (argc, argv)
     {
       for (envp = environ; *envp; envp++)
 	puts (*envp);
-      exit (0);
+      exit(EXIT_SUCCESS);
     }
 
   /* printenv varname */
@@ -59,9 +59,9 @@ main (argc, argv)
 	  if (*eval == '=')
 	    {
 	      puts (eval + 1);
-	      exit (0);
+	      exit(EXIT_SUCCESS);
 	    }
 	}
     }
-  exit (1);
+  exit(EXIT_FAILURE);
 }

shell/ash_test/recho.c

@@ -41,7 +41,7 @@ char	**argv;
 		strprint(argv[i]);
 		printf(">\n");
 	}
-	exit(0);
+	exit(EXIT_SUCCESS);
 }
 
 void

shell/ash_test/zecho.c

@@ -35,5 +35,5 @@ char	**argv;
 	}
 
 	putchar('\n');
-	exit(0);
+	exit(EXIT_SUCCESS);
 }

shell/bbsh.c

@@ -168,7 +168,7 @@ static int run_pipeline(struct pipeline *line)
 			run_applet_and_exit(cmd->argv[0],cmd->argc,cmd->argv);
 			execvp(cmd->argv[0],cmd->argv);
 			printf("No %s",cmd->argv[0]);
-			exit(1);
+			exit(EXIT_FAILURE);
 		} else waitpid(pid, &status, 0);
 	}
 

shell/hush.c

@@ -1480,7 +1480,7 @@ static void pseudo_exec_argv(char **argv)
 	debug_printf_exec("execing '%s'\n", argv[0]);
 	execvp(argv[0], argv);
 	bb_perror_msg("cannot exec '%s'", argv[0]);
-	_exit(1);
+	_exit(EXIT_FAILURE);
 }
 
 /* Called after [v]fork() in run_pipe()

shell/msh.c

@@ -2855,7 +2855,7 @@ static int forkexec(struct op *t, int *pin, int *pout, int no_fork, char **wp)
 	if (t->op_type == TPAREN)
 		_exit(execute(t->left, NOPIPE, NOPIPE, /* no_fork: */ 1));
 	if (wp[0] == NULL)
-		_exit(0);
+		_exit(EXIT_SUCCESS);
 
 	cp = rexecve(wp[0], wp, makenv(0, NULL));
 	prs(wp[0]);
@@ -4207,7 +4207,7 @@ static int grave(int quoted)
 	prs(argument_list[0]);
 	prs(": ");
 	err(cp);
-	_exit(1);
+	_exit(EXIT_FAILURE);
 }
 
 
@@ -4733,7 +4733,7 @@ static int filechar(struct ioarg *ap)
 		while (size == 0 || position >= size) {
 			size = read_line_input(current_prompt, filechar_cmdbuf, BUFSIZ, line_input_state);
 			if (size < 0) /* Error/EOF */
-				exit(0);
+				exit(EXIT_SUCCESS);
 			position = 0;
 			/* if Ctrl-C, size == 0 and loop will repeat */
 		}
@@ -5212,7 +5212,7 @@ int msh_main(int argc, char **argv)
 
 			name = *++argv;
 			if (newfile(name))
-				exit(1);		/* Exit on error */
+				exit(EXIT_FAILURE);		/* Exit on error */
 		}
 	}