通过shell命令提取文件内容（C实现）

[root@FiberHome]cat /etc/fh_version
FH_DEVICE_TYPE="LG522"
FH_SOFTWARE_VER="L04Y1.03M00"
FH_HARDWARE_VER="V1.0"
FH_OPERATOR=CM

[root@FiberHome]cat /etc/fh_version | grep FH_SOFTWARE_VER | cut -d\" -f 2
L04Y1.03M00</span>

void get_cmd_res(const char *cmd, char *res_string)
{
FILE *fp;
DEBUG_LOG("-----cmd:%s\n",cmd);
if ((fp = popen(cmd, "r")) == NULL)
{
DEBUG_LOG("popen failed\n");
return;
}
if (res_string != NULL)
{
fscanf(fp, "%s", res_string);
DEBUG_LOG("read cmd result\n");
}
pclose(fp);
DEBUG_LOG("result:%s.\n",res_string);

return;
}

int main()
{
    char cmd[128]="cat /etc/fh_version | grep FH_SOFTWARE_VER | cut -d\\\" -f 2";
    char result_str[32]={0};

    get_cmd_res(cmd, result_str);
    return 0;
}