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A crude but straightforward way to achieve this is to cast the whole array to an unsigned char*:Ĭonst unsigned char* mac=(unsigned char*)ifr.ifr_hwaddr. In this Rocket Yard tutorial, we show you several ways to design an HTML email, then let you in on the secret of how to send those emails from the Mac Mail app. It is presented by an array of char, which could be a signed type, so if you wish to interpret it in any way then it should first be converted to an unsigned representation. Having checked its type, the address can now be safely extracted from req.ifr_hwaddr.sa_data. Extract the hardware address from the ifreq structure txt extensions (the only options it will allow), and Explorer says 'it doesn't know how to handle the. html extension, as you specify needs to happen for the browsers to properly read it. However, it will not let me save the file with an.
How to get html for mac code#
Note that for some of these (such as ARPHRD_LOOPBACK) there is no hardware address as such. A reader writes:I have a Mac running OS 10.3.5, and I am trying to use TextEdit to write HTML code in your example. If (if_name_len, each beginning with the prefix ARPHRD_. Since this is a fixed-length buffer you should take care to ensure that the name does not cause an overrun: The ifreq structure should initially contain the name of the interface to be queried, which should be copied into the ifr_name field. The following header files will be needed:Ĭreate an ifreq structure for passing data in and out of ioctl
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Extract the hardware address from the ifreq structure.Also change some preferences to get the application to save files correctly. Check the type of the returned hardware address. Step 1: Open TextEdit (Mac) Open Finder > Applications > TextEdit.Create an ifreq structure for passing data in and out of ioctl.The method described here has five steps: On Linux-based systems the MAC address of an interface can be obtained using the ioctl command SIOCGIFHWADDR. The variable if_name points to a null-terminated string containing the name of the interface (for example, eth0). Suppose you wish to display the MAC address of an Ethernet interface. To get the MAC address of an Ethernet interface in C using the ioctl command SIOCGIFHWADDR Scenario