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-rw-r--r--usr.bin/m4/eval.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/usr.bin/m4/eval.c b/usr.bin/m4/eval.c
index 59fde31138b4..f36f41f4805c 100644
--- a/usr.bin/m4/eval.c
+++ b/usr.bin/m4/eval.c
@@ -170,7 +170,10 @@ register int td;
case SYSCTYPE:
/*
* dosys - execute system command
- */
+ */
+ /* Make sure m4 output is NOT interrupted */
+ fflush(stdout);
+ fflush(stderr);
if (argc > 2)
sysval = system(argv[2]);
break;