Flush all stdio streams before running a shell command.

Otherwise, if ed's output is not line buffered (e.g. if it is
redirected to a file or pipe) the shell command output may be
displayed before data buffered by ed itself is written.
From Soeren Tempel.  OK deraadt@

diff --git a/bin/ed/main.c b/bin/ed/main.c
index dc73dd9..231d021 100644 (file)
--- a/bin/ed/main.c
+++ b/bin/ed/main.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: main.c,v 1.66 2019/06/28 13:34:59 deraadt Exp $       */
+/*     $OpenBSD: main.c,v 1.67 2022/01/22 23:22:11 millert Exp $       */
 /*     $NetBSD: main.c,v 1.3 1995/03/21 09:04:44 cgd Exp $     */
 
 /* main.c: This file contains the main control and user-interface routines
@@ -852,6 +852,7 @@ exec_command(void)
                        return ERR;
                GET_COMMAND_SUFFIX();
                if (sflags) printf("%s\n", shcmd + 1);
+               fflush(NULL); /* flush any buffered I/O */
                system(shcmd + 1);
                if (!scripted) printf("!\n");
                break;