after getenv, check for empty string too. ok millert

diff --git a/sbin/restore/main.c b/sbin/restore/main.c
index b564f95..1d96349 100644 (file)
--- a/sbin/restore/main.c
+++ b/sbin/restore/main.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: main.c,v 1.24 2016/06/07 01:29:38 tedu Exp $  */
+/*     $OpenBSD: main.c,v 1.25 2016/07/28 21:37:10 tedu Exp $  */
 /*     $NetBSD: main.c,v 1.13 1997/07/01 05:37:51 lukem Exp $  */
 
 /*
@@ -81,9 +81,9 @@ main(int argc, char *argv[])
        if (argc < 2)
                usage();
 
-       if ((inputdev = getenv("TAPE")) == NULL)
+       if ((inputdev = getenv("TAPE")) == NULL || *inputdev == '\0')
                inputdev = _PATH_DEFTAPE;
-       if ((tmpdir = getenv("TMPDIR")) == NULL)
+       if ((tmpdir = getenv("TMPDIR")) == NULL || *tmpdir == '\0')
                tmpdir = _PATH_TMP;
        if ((tmpdir = strdup(tmpdir)) == NULL)
                err(1, NULL);