plan9port

commit 8cd46ae7bc031f311c833ad32445f5cde1916f99
parent d6f8c236b8c601781cef6f8521fd47dffa1758b4
Author: Neven Sajko <nsajko@gmail.com>
Date:   Sat, 28 May 2016 03:13:35 +0200

ls: check that pointer is not nil before calling qsort

Passing a null pointer to qsort is an error in C (GCC and Clang agree
with the standards there, so this is no joke).

Change-Id: Ia2b015793a75ea4e85ae8f47da6beead9c4290e6

Diffstat:
M
src/cmd/ls.c
 | 
2
+-

1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/src/cmd/ls.c b/src/cmd/ls.c
@@ -143,7 +143,7 @@ output(void)
 	char buf[4096];
 	char *s;
 
-	if(!nflag)
+	if(!nflag && dirbuf!=0)
 		qsort(dirbuf, ndir, sizeof dirbuf[0], (int (*)(const void*, const void*))compar);
 	for(i=0; i<ndir; i++)
 		dowidths(dirbuf[i].d);