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Subject: [PATCH 8 of 8] tput: use iounit for reads, check sbrk return value
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Date: Sun, 23 Aug 2015 16:49:18 -0700
From: mischief <mischief@offblast.org>
To: 9front@9front.org

# HG changeset patch
# User mischief <mischief@offblast.org>
# Date 1440366687 25200
#      Sun Aug 23 14:51:27 2015 -0700
# Node ID 4d2e0315f59bc5153bd46690b0b43991f24ce121
# Parent  eb135d711d3e30fa57cfa2c87d53a2ac1a1ee34d
tput: use iounit for reads, check sbrk return value

diff -r eb135d711d3e -r 4d2e0315f59b sys/src/cmd/tput.c
--- a/sys/src/cmd/tput.c	Sun Aug 23 14:51:27 2015 -0700
+++ b/sys/src/cmd/tput.c	Sun Aug 23 14:51:27 2015 -0700
@@ -1,10 +1,6 @@
 #include <u.h>
 #include <libc.h>
 
-int dopipe;
-int buflen = 8192;
-uvlong bc, sec;
-
 void
 usage(void)
 {
@@ -16,9 +12,10 @@
 main(int argc, char **argv)
 {
 	double speed;
-	int rc, cpid;
+	int rc, cpid, dopipe, buflen;
+	uvlong bc, sec;
 	char *buf;
-	
+
 	ARGBEGIN {
 	case 'b':
 		buflen = atoi(EARGF(usage()));
@@ -32,10 +29,16 @@
 
 	if(argc != 0)
 		usage();
-	
+
+	buflen = iounit(0);
+	if(buflen <= 0)
+		buflen = IOUNIT;
+
 	bc = 0;
 	sec = 0;
 	buf = sbrk(buflen);
+	if(buf == (void*)-1)
+		sysfatal("out of memory");
 	cpid = rfork(RFPROC | RFMEM);
 	if(cpid == 0) {
 		while(1) {