Index: fusl/src/network/if_indextoname.c |
diff --git a/fusl/src/network/if_indextoname.c b/fusl/src/network/if_indextoname.c |
new file mode 100644 |
index 0000000000000000000000000000000000000000..6ee7f13ce38ee10f1d32f7c9f266b9da2544beff |
--- /dev/null |
+++ b/fusl/src/network/if_indextoname.c |
@@ -0,0 +1,18 @@ |
+#define _GNU_SOURCE |
+#include <net/if.h> |
+#include <sys/socket.h> |
+#include <sys/ioctl.h> |
+#include <string.h> |
+#include "syscall.h" |
+ |
+char *if_indextoname(unsigned index, char *name) |
+{ |
+ struct ifreq ifr; |
+ int fd, r; |
+ |
+ if ((fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0)) < 0) return 0; |
+ ifr.ifr_ifindex = index; |
+ r = ioctl(fd, SIOCGIFNAME, &ifr); |
+ __syscall(SYS_close, fd); |
+ return r < 0 ? 0 : strncpy(name, ifr.ifr_name, IF_NAMESIZE); |
+} |