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-rw-r--r--shell/hush.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/shell/hush.c b/shell/hush.c
index 5da9757..0a32099 100644
--- a/shell/hush.c
+++ b/shell/hush.c
@@ -2825,7 +2825,7 @@ int hush_main(int argc, char **argv)
* standard output is a terminal
* Refer to Posix.2, the description of the `sh' utility. */
if (argv[optind]==NULL && input==stdin &&
- isatty(fileno(stdin)) && isatty(fileno(stdout))) {
+ isatty(STDIN_FILENO) && isatty(STDOUT_FILENO)) {
interactive++;
}