X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=src%2Fnetwork%2Fif_indextoname.c;h=3b368bf0d1329be7e9844da37a3bd78eff6914b0;hb=9b132e556774c744f9052581d2d8d0fab417e97c;hp=6ee7f13ce38ee10f1d32f7c9f266b9da2544beff;hpb=0716b10ac8dc167f96969c964974d4094035fed0;p=musl

diff --git a/src/network/if_indextoname.c b/src/network/if_indextoname.c
index 6ee7f13c..3b368bf0 100644
--- a/src/network/if_indextoname.c
+++ b/src/network/if_indextoname.c
@@ -3,6 +3,7 @@
 #include <sys/socket.h>
 #include <sys/ioctl.h>
 #include <string.h>
+#include <errno.h>
 #include "syscall.h"
 
 char *if_indextoname(unsigned index, char *name)
@@ -14,5 +15,9 @@ char *if_indextoname(unsigned index, char *name)
 	ifr.ifr_ifindex = index;
 	r = ioctl(fd, SIOCGIFNAME, &ifr);
 	__syscall(SYS_close, fd);
-	return r < 0 ? 0 : strncpy(name, ifr.ifr_name, IF_NAMESIZE);
+	if (r < 0) {
+		if (errno == ENODEV) errno = ENXIO;
+		return 0;
+	}
+	return strncpy(name, ifr.ifr_name, IF_NAMESIZE);
 }