util, pasta: Don't read() and lseek() every single line in read_line()

...periodically checking bound ports becomes quite expensive
otherwise.

Signed-off-by: Stefano Brivio <sbrivio@redhat.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/conf.c b/conf.c
index b92a7d9..b91d09b 100644
--- a/conf.c
+++ b/conf.c
@@ -293,7 +293,7 @@ static void get_dns(struct ctx *c)
 	if ((fd = open("/etc/resolv.conf", O_RDONLY)) < 0)
 		goto out;
 
-	while (line_read(buf, BUFSIZ, fd)) {
+	while (!(*buf = 0) && line_read(buf, BUFSIZ, fd)) {
 		if (!dns_set && strstr(buf, "nameserver ") == buf) {
 			p = strrchr(buf, ' ');
 			if (!p)