[Mingw-users] Cannot reading binary files on Windows 10 completely.

[Amit C. <ac7...@gm...>]

I am facing a problem that when I try to read binary files on Windows 10, I
am not able to read whole file. Does anyone else also faced same/similar
problem.

read() function (of tdm64-gcc-5.1.0-2) not reading whole file if the file
is binary (on Windows 10).

The gcc used is TDM-GCC-64 (
http://sourceforge.net/projects/tdm-gcc/files/TDM-GCC%20Installer/tdm64-gcc-5.1.0-2.exe/download).
The Windows platform is Windows 10.

When I open a binary file in O_RDONLY mode, and then try to read it, the
read() call returns "0" bytes even before reading the whole file.

I tried with O_RDONLY | O_BINARY mode, read() call reads few more bytes
than without O_BIANRY mode but it still does not read the whole file. It
returns "0" bytes even before reading the whole file.

I am attaching the source code (cat.c) and its executable (cat.exe) and a
test binary file (cp.exe).

I compiled cat.c using: gcc -static cat.c -o cat.exe

Trying to read cp.exe: cat.exe cp.exe

cat.c is attached in this mail.

For cat.exe and cp.exe, please visit the webpage (bug filed with TDM-GCC):
https://sourceforge.net/p/tdm-gcc/bugs/323/