Kernel+LibC: Switch isatty() to use a fcntl()

We would want it to work with only stdio pledged.
Author: https://github.com/bugaevc Commit: 7541122206 Pull-request: https://github.com/SerenityOS/serenity/pull/2299 Reviewed-by: https://github.com/awesomekling
2025-08-26 12:17:52 +00:00 · 2020-05-19 20:34:45 +03:00 · 2020-05-19 20:34:45 +03:00 · 7541122206 · 2024-07-19 06:22:57 +09:00
commit 7541122206
parent f9cffda0e0
4 changed files with 5 additions and 2 deletions
--- a/Libraries/LibC/unistd.cpp
+++ b/Libraries/LibC/unistd.cpp
@ -413,8 +413,7 @@ int rmdir(const char* pathname)

 int isatty(int fd)
 {
-    struct termios dummy;
-    return tcgetattr(fd, &dummy) == 0;
+    return fcntl(fd, F_ISTTY);
 }

 int dup(int old_fd)