toolchain/musl/patches/030-fix-if_indextoname-error-case.patch

   1 From 32055d52ca43d867d6dbb763dc5213a8d3536a23 Mon Sep 17 00:00:00 2001
   2 From: Daniel Sabogal <dsabogalcc@gmail.com>
   3 Date: Thu, 15 Sep 2016 11:27:30 -0400
   4 Subject: fix if_indextoname error case
   5
   6 posix requires errno to be set to ENXIO if the interface does not exist.
   7 linux returns ENODEV instead so we handle this.
   8 ---
   9  src/network/if_indextoname.c | 7 ++++++-
  10  1 file changed, 6 insertions(+), 1 deletion(-)
  11
  12 diff --git a/src/network/if_indextoname.c b/src/network/if_indextoname.c
  13 index 6ee7f13..3b368bf 100644
  14 --- a/src/network/if_indextoname.c
  15 +++ b/src/network/if_indextoname.c
  16 @@ -3,6 +3,7 @@
  17  #include <sys/socket.h>
  18  #include <sys/ioctl.h>
  19  #include <string.h>
  20 +#include <errno.h>
  21  #include "syscall.h"
  22
  23  char *if_indextoname(unsigned index, char *name)
  24 @@ -14,5 +15,9 @@ char *if_indextoname(unsigned index, char *name)
  25         ifr.ifr_ifindex = index;
  26         r = ioctl(fd, SIOCGIFNAME, &ifr);
  27         __syscall(SYS_close, fd);
  28 -       return r < 0 ? 0 : strncpy(name, ifr.ifr_name, IF_NAMESIZE);
  29 +       if (r < 0) {
  30 +               if (errno == ENODEV) errno = ENXIO;
  31 +               return 0;
  32 +       }
  33 +       return strncpy(name, ifr.ifr_name, IF_NAMESIZE);
  34  }
  35 --
  36 cgit v0.11.2