diff options
| -rw-r--r-- | src/network/if_indextoname.c | 7 |
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); } |