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Use fread, not fwrite in the while loop condition, and use memcard instead of image fwrite only if image != NULL fclose(image); only if image != NULL You start with 001.jpg, it should have been 000.j …

For "%03i.jpg", you need at least 8 char (7 for the file name like 000.jpg, and one for the null terminator). DO NOT open a file in your else path, it just makes no sense, especially with a filename …

Ask de Morgan (Disclaimer: I've studied physics, boolean logic was part of the maths curriculum) The opposite of data[0]==0xff&&data[1]==0xd8&&data[2]==0xff&&(data[3]==0xe0||data[3]==0xe1) is dat …

The error message you describe is due to your code not testing argc. You are meant to complain if no file name is passed, and use argv[1] as the file name if it is provided. card.raw is just the sampl …

feof in this case makes no sense. It checks the EOF flag, which is set after an unsuccessful read. In that case, fread would have returned 0, so you would not be there. Likewise, do not fclose(infile) …

The problem is with the array/pointer type. You declared it as int[]/int*, with an int on our system being 32 bit, or 4 bytes long. So all the first four bytes are within that first element. The wal …

/recover card.raw …

Here you fwrite even when outptr is still NULL. //write the rest of the buffer until the if condition triggers the loop above else { fwrite(buffer, sizeof(buffer), …

You code is much more complicated than necessary. int count = 0; FILE* img[count]; You create an array of length 0, so there's no space on the stack associated with that variable. You don' …

I see two writes that are way off: fread(&bytes, 32 , 1, pf); reads 32 bytes into a uint8_t[4], a 4-byte buffer fread(&reader, 512, 1, raw) reads 512 bytes into an int, which is a 2 to 8 byte va …

Please initialize FILE* tempjpgg = NULL; (In my experience, some compilers initialize to zero automatically, others don't) Also, firstint should point to the beginning of your 512 bytes, so instea …

Files start at index 0, not 1. Pass buffer, not &buffer, as buffer is a pointer to a byte (and can be used as an array), while &buffer is a pointer to a pointer to a byte, so you'd overwrite your poi …

You could locate the place of the segfault using debug50, here I'm just guessing where I'd expect a segfault. fread(&buffer, 1, 512, pmem) should be fread(buffer, 1, 512, pmem) buffer is a point …

In while ((fread (buffer, 1, 512, inptr)) != 0) you read a 512 byte block of data. Just after that, in if (((fread (buffer, 1,512, inptr)) < 512) && (FILEOPENED == true)), you read another 512 byte bl …

First: sample is the pointer you want to pass to fread and fwrite, not &sample. Otherwise you risk segfaults there. Second: You cannot fclose(NULL), but that's what happens on encountering first JPEG …