core/cat: Fix bug - see description

`cat` used to not concatenate at all when ran like this:

    $ cat

It did read standard input, but did not output anything to
standard output. fdopen() was used on STDIN_FILENO when it
shouldn't.

Signed-off-by: Ferass El Hafidi <vitali64pmemail@protonmail.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/core/cat.c b/core/cat.c
index 08d1866..60833aa 100644
--- a/core/cat.c
+++ b/core/cat.c
@@ -49,7 +49,8 @@ int cat(int fildes, int unbuffered) {
 	if (unbuffered) while ((length = read(fildes, s, 4096)) > 0)
 		write(STDOUT_FILENO, s, length);
 	else {
-		filstr = fdopen(fildes, "r");
+		if (fildes != STDIN_FILENO) filstr = fdopen(fildes, "r");
+		else filstr = stdin;
 		while ((length = fread(s, 4096, 1, filstr)) > 0)
 			fwrite(s, length, 1, stdout);
 	}