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Diffstat (limited to 'userland/libc/unistd/isatty.c')
-rw-r--r--userland/libc/unistd/isatty.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/userland/libc/unistd/isatty.c b/userland/libc/unistd/isatty.c
index d8b08c3..55cf4e7 100644
--- a/userland/libc/unistd/isatty.c
+++ b/userland/libc/unistd/isatty.c
@@ -1,11 +1,12 @@
+#include <errno.h>
#include <syscall.h>
#include <unistd.h>
-#include <errno.h>
int isatty(int fd) {
int rc = syscall(SYS_ISATTY, fd, 0, 0, 0, 0);
- if (1 == rc)
+ if (1 == rc) {
return rc;
+ }
errno = -rc;
return 0;
}