37 lines
1.1 KiB
Diff
37 lines
1.1 KiB
Diff
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From 32055d52ca43d867d6dbb763dc5213a8d3536a23 Mon Sep 17 00:00:00 2001
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From: Daniel Sabogal <dsabogalcc@gmail.com>
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Date: Thu, 15 Sep 2016 11:27:30 -0400
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Subject: fix if_indextoname error case
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posix requires errno to be set to ENXIO if the interface does not exist.
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linux returns ENODEV instead so we handle this.
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---
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src/network/if_indextoname.c | 7 ++++++-
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1 file changed, 6 insertions(+), 1 deletion(-)
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diff --git a/src/network/if_indextoname.c b/src/network/if_indextoname.c
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index 6ee7f13..3b368bf 100644
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--- a/src/network/if_indextoname.c
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+++ b/src/network/if_indextoname.c
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@@ -3,6 +3,7 @@
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#include <sys/socket.h>
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#include <sys/ioctl.h>
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#include <string.h>
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+#include <errno.h>
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#include "syscall.h"
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char *if_indextoname(unsigned index, char *name)
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@@ -14,5 +15,9 @@ char *if_indextoname(unsigned index, char *name)
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ifr.ifr_ifindex = index;
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r = ioctl(fd, SIOCGIFNAME, &ifr);
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__syscall(SYS_close, fd);
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- return r < 0 ? 0 : strncpy(name, ifr.ifr_name, IF_NAMESIZE);
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+ if (r < 0) {
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+ if (errno == ENODEV) errno = ENXIO;
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+ return 0;
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+ }
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+ return strncpy(name, ifr.ifr_name, IF_NAMESIZE);
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}
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--
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cgit v0.11.2
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