通过grep,awk,sed的简单应用获取网卡信息。

int cmd_shell(char *shellcmd, char *outbuffer, int size) {

    FILE *stream;
    char buffer[size];
        memset(buffer, 0, sizeof(buffer));

    stream = popen(shellcmd, "r");
    if (stream != NULL) {
            fread(buffer, sizeof(char), sizeof(buffer), stream);
            pclose(stream);
            memcpy(outbuffer, buffer, strlen(buffer) + 1);

            return 0;
    } else {
        outbuffer[0] = '