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Random zero byte file2/11/2023 ![]() * 1st parameter: a file name, 2nd parameter: a file size. But tests should be done on your system 1st. In this case, the 1st call to lseek and write could be removed. I have narrowed it down to a process called M86 Authenticator (authenticats.exe). The FILE structure is a special opaque structure defined in .I ran ComboFix and have pasted the log below. Devices as varied as serial devices, disks, and what the user types in his/her keyboard are abstracted under the same concept: a FILE as a sequence of bytes to handle. Value 0 until data is actually written into the gap. I had over 64,000 zero byte files in my TEMP directory when I noticed it. ![]() Point, subsequent reads of data in the gap shall return bytes with the The lseek() function shall allow the file offset to be set beyond theĮnd of the existing data in the file. It might even do what you want (padding with null bytes) as the lseek function definition states that: ![]() ![]() In this case, the C program bellow would be very efficient (to be used only on files smaller than the 2nd parameter, otherwise data would be overwritten). If this is the case, you might not need to pad the file with null bytes, only adding a null byte at the end of the file and then padding it with random bytes could be enough. ![]() If you are padding your file with null bytes, my guess is that you are manipulating the file in a char * in C. ![]()
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