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authorDaniel Sabogal <dsabogalcc@gmail.com>2016-09-15 11:27:30 -0400
committerRich Felker <dalias@aerifal.cx>2016-09-16 18:03:06 -0400
commit32055d52ca43d867d6dbb763dc5213a8d3536a23 (patch)
treec9a193f066851b22442d87a037926fbcd838d57e
parent3848a99f65952a77c03bbd905cae988f37f13ea6 (diff)
downloadmusl-32055d52ca43d867d6dbb763dc5213a8d3536a23.tar.gz
fix if_indextoname error case
posix requires errno to be set to ENXIO if the interface does not exist. linux returns ENODEV instead so we handle this.
-rw-r--r--src/network/if_indextoname.c7
1 files changed, 6 insertions, 1 deletions
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);
}