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subprocess-win: fix swprintf usage

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The count parameter refers to the number of wide-characters to write to
the buffer (including the terminating NUL character, which is always
added,) not the number of bytes. See C99 7.24.2.3 or
https://msdn.microsoft.com/en-us/library/ybk95axf.aspx
This commit is contained in:
James Ross-Gowan 2017-07-29 21:13:07 +10:00
parent df12f76910
commit 28e3618e79
1 changed files with 2 additions and 1 deletions
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osdep/subprocess-win.c
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@ -112,7 +112,8 @@ static int create_overlapped_pipe(HANDLE *read, HANDLE *write)
unsigned long id = atomic_fetch_add(&counter, 1);
unsigned pid = GetCurrentProcessId();
wchar_t buf[36];
swprintf(buf, sizeof(buf), L"\\\\.\\pipe\\mpv-anon-%08x-%08lx", pid, id);
swprintf(buf, MP_ARRAY_SIZE(buf), L"\\\\.\\pipe\\mpv-anon-%08x-%08lx",
pid, id);
// The function for creating anonymous pipes (CreatePipe) can't create
// overlapped pipes, so instead, use a named pipe with a unique name