source: azure_iot_hub/trunk/musl-1.1.18/src/network/if_nametoindex.c@ 389

Last change on this file since 389 was 389, checked in by coas-nagasima, 5 years ago

ビルドが通るよう更新
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File size: 429 bytes
Line 
1#define _GNU_SOURCE
2#include <net/if.h>
3#include <sys/socket.h>
4#include <sys/ioctl.h>
5#include <string.h>
6#include "syscall.h"
7
8unsigned if_nametoindex(const char *name)
9{
10 struct ifreq ifr;
11 int fd, r;
12
13 if ((fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0)) < 0) return 0;
14 strncpy(ifr.ifr_name, name, sizeof ifr.ifr_name);
15 r = ioctl(fd, SIOCGIFINDEX, &ifr);
16 __syscall(SYS_close, fd);
17 return r < 0 ? 0 : ifr.ifr_ifindex;
18}
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