#include

<

stdio.h

>

#include

<

sys

/

types.h

>

#include

<

sys

/

socket.h

>

#include

<

sys

/

ioctl.h

>

#include

<

netinet

/

in

.h

>

#include

<

net

/

if

.h

>

#include

<

net

/

if_arp.h

>

#include

<

arpa

/

inet.h

>

#include

<

errno.h

>

#include

<

string

.h

>

#define

ETH_NAME "eth1"

int

main()

{

int

sock;

struct

sockaddr_in sin;

struct

ifreq ifr;

sock

=

socket(AF_INET, SOCK_DGRAM,

0

);

if

(sock

==

-

1

)

{

perror(

"

socket

"

);

return

-

1

;

}

strncpy(ifr.ifr_name, ETH_NAME, IFNAMSIZ);

ifr.ifr_name[IFNAMSIZ

-

1

]

=

0

;

if

(ioctl(sock, SIOCGIFADDR,

&

ifr)

<

0

)

{

perror(

"

ioctl

"

);

return

-

1

;

}

memcpy(

&

sin,

&

ifr.ifr_addr,

sizeof

(sin));

fprintf(stdout,

"

eth0: %s\n

"

, inet_ntoa(sin.sin_addr));

return

0

;

}

上述代码有个毛病，只能获取一张网卡的ip地址。哎呀哎呀，真的很难得获得所有网卡的ip地址

不知道怎么获取。

下述代码就无敌了。什么都可以获取。

#include

<

stdio.h

>

#include

<

unistd.h

>

#include

<

iostream

>

using

namespace

std;

int

main()

{

FILE

*

fp

=

popen(

"

/sbin/ifconfig -a | grep -v inet6 | awk '/inet/{print $2}' | awk -F: '{print $2}'

"

,

"

r

"

);

char

str[

1024

];

fread(str,

sizeof

(str),

1

,fp);

cout

<<

str;

pclose(fp);

}

~