How to read a binary file in c? (video, images, or text)

Question

I am trying to copy a file from a specified library to the current directory. I can copy text files perfectly. Any other files become corrupt. The program detects a feof bef

Answer 1

Are you on a Windows machine? Try adding "b" to the mode strings in the calls to fopen.

From man fopen(3):

The mode string can also include the letter 'b' either as a last character or as a character between the characters in any of the two-character strings described above. This is strictly for compatibility with C89 and has no effect; the 'b' is ignored on all POSIX conforming systems, including Linux. (Other systems may treat text files and binary files differently, and adding the 'b' may be a good idea if you do I/O to a binary file and expect that your program may be ported to non-Unix environments.)

Answer 2

You need to specify the "b" option to fopen:

source = fopen("./library/rfc1350.txt", "rb");
...
destination = fopen("rfc1350.txt", "wb");

Without it, the file is opened in text ("t") mode, and this results in translation of end-of-line characters.

Answer 3

You need to open the files in binary format rather than text format. In your calls to fopen, use "rb" and "wb" rather than "r" and "w" respectively.