scc

commit 6e5e998efb6bbb9f65cff011c2f99162bd883ff1
parent 63f255f9a07e605d18170a869f2808e669c10706
Author: Roberto E. Vargas Caballero <k0ga@shike2.com>
Date:   Fri, 28 Sep 2018 14:25:03 +0100

[lib/c] Fix unbuffered output

It needs a special case in __putc, because the character
must be assigned before calling _flsbuf().

Diffstat:
M
lib/c/__putc.c
 | 
6
+++++-
M
lib/c/stdio.c
 | 
4
+++-

2 files changed, 8 insertions(+), 2 deletions(-)
diff --git a/lib/c/__putc.c b/lib/c/__putc.c
@@ -60,10 +60,14 @@ __putc(int ch, FILE *fp)
 		*fp->lp++ = ch;
 		if (ch == '\n' && _flsbuf(fp))
 			return EOF;
-	} else {
+	} else if (fp->flags & _IOFBF) {
 		if (fp->wp == fp->rp && _flsbuf(fp))
 			return EOF;
 		*fp->wp++ = ch;
+	} else {
+		*fp->wp++ = ch;
+		if (_flsbuf(fp))
+			return EOF;
 	}
 
 done:
diff --git a/lib/c/stdio.c b/lib/c/stdio.c
@@ -26,6 +26,8 @@ FILE __iob[FOPEN_MAX] = {
 		.fd = 2,
 		.buf = stderr->unbuf,
 		.len = sizeof(stderr->unbuf),
-		.flags = _IOWRITE
+		.flags = _IOWRITE | _IONBF,
+		.rp = stderr->unbuf,
+		.wp = stderr->unbuf,
 	},
 };