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-rw-r--r--c/src/libmisc/shell/shell.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/c/src/libmisc/shell/shell.c b/c/src/libmisc/shell/shell.c
index 76f534d214..c13af8d6e2 100644
--- a/c/src/libmisc/shell/shell.c
+++ b/c/src/libmisc/shell/shell.c
@@ -288,7 +288,7 @@ int shell_scanline(char * line,int size,FILE * in,FILE * out) {
if (out) fprintf(out,"%s",line);
};
tcdrain(fileno(in ));
- tcdrain(fileno(out));
+ if (out) tcdrain(fileno(out));
for (;;) {
line[col]=0;
c=fgetc(in);