getDeviceInfo.cpp

#include <stdlib.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <linux/netdevice.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <sys/system_properties.h>
#include <stdio.h>

char cmd_res_line[256];
char total_cmd_res[25600];

char* exec_get_out(char* cmd) {

    FILE* pipe = popen(cmd, "r");

    if (!pipe)
    	return NULL;

    total_cmd_res[0] = 0;

    while(!feof(pipe)) {
        if(fgets(cmd_res_line, 256, pipe) != NULL)
        {
        	//TODO: add handling for long command reads...
        	strcat(total_cmd_res,cmd_res_line);
        }
    }
    pclose(pipe);
    return total_cmd_res;
}

void getIMEI(char *g_imei)
{
	char *imei_start = new char[PROP_VALUE_MAX];
    //returns the string length of the value.
//    int ir = __system_property_get("ro.product.manufacturer", imei_start);
    int ir = __system_property_get("ro.product.model", imei_start);
//    int ir = __system_property_get("ro.product.serialno", imei_start);

    if(ir > 0){
    	imei_start[31]=0;//strz end
    	strcpy(g_imei,imei_start);
    	__android_log_print(ANDROID_LOG_ERROR, "TAG", "method IMEI [%s] len %d\r\n",imei_start,strlen(imei_start));
    }
}

bool getMacAddress(char *pBuffer)
{
    struct ifreq *ifr;
    struct ifconf ifc;
    int sock, i;
    int numif;

    // find number of interfaces.
    memset(&ifc, 0, sizeof(ifc));
    ifc.ifc_ifcu.ifcu_req = NULL;
    ifc.ifc_len = 0;

    if ((sock = ::socket(PF_INET, SOCK_STREAM, 0)) < 0)
    {
        return false;
    }

    if (ioctl(sock, SIOCGIFCONF, &ifc) < 0)
    {
        return false;
    }

    if ((ifr = (ifreq*) malloc(ifc.ifc_len)) == NULL)
    {
        return false;
    }

    ifc.ifc_ifcu.ifcu_req = ifr;

    if (ioctl(sock, SIOCGIFCONF, &ifc) < 0)
    {
        return false;
    }

    numif = ifc.ifc_len / sizeof(struct ifreq);

    for (i = 0; i < numif; i++)
    {
        struct ifreq *r = &ifr[i];
        struct sockaddr_in *sin = (struct sockaddr_in*)&r->ifr_addr;
        if (!strcmp(r->ifr_name, "lo"))
            continue; // skip loopback interface

        // get MAC address
        if(ioctl(sock, SIOCGIFHWADDR, r) < 0)
        {
            continue;
        }

        memcpy(pBuffer, r->ifr_hwaddr.sa_data, 6);
        close(sock);
        free(ifr);

        return true;
     }

     return false;
}

int main() {
	char *mac = new char[14];
	bool success = getMacAddress(mac);

	if (success) {
		__android_log_print(ANDROID_LOG_ERROR, "TAG", "MAC Address : %02x:%02x:%02x:%02x:%02x:%02x",
				(unsigned char) mac[0],
				(unsigned char) mac[1],
				(unsigned char) mac[2],
				(unsigned char) mac[3],
				(unsigned char) mac[4],
				(unsigned char) mac[5]);
	} else {
		__android_log_print(ANDROID_LOG_ERROR, "TAG", "~~~get mac address failed~~");
	}

	char *imei = new char[32];
	getIMEI(imei);
	__android_log_print(ANDROID_LOG_ERROR, "TAG", "IMEI : %s", imei);
}

你的getimei获取到的不是imei，而是设备型号啊