i still don't understand why not using GetConsoleMode() and see if it fails or not.
if it fails : redirection is done with named pipes if not : it's standard win32 I/O it's simple and works in my tests (DOS console, MSYS1, mintty, MSYS2 and cygwin terminal >= 1.8) Vincent Torri On Sun, Nov 13, 2016 at 1:00 AM, Mihail Konev <k....@ya.ru> wrote: > Applications now could call iscygtty(STDIN_FILENO) > in order to detect whether they are running from > Cygwin/MSys terminal. > > Without that, they have no choice but to think that > stdin is redirected from a named pipe. > > Signed-off-by: Mihail Konev <k....@ya.ru> > Moved-from: https://github.com/Alexpux/mingw-w64/pull/3 > Adapted-from: https://cygwin.com/ml/cygwin-developers/2016-11/msg00002.html > --- > v7: > - set errno if returning false > - do not depend on ntdll.dll being linked, use GetProcAddress > - stricter name check > - act as cygwin.dll isatty() > I.e. is-it-mintty-or-cmd? > To get the previous is-it-mintty? behaviour, just omit the "if (_isatty)". > > The is-it-mintty? is actually a leftover from initial example; > the "real" version could as well aggressively alias the stanard api > (especially given that applications could still call the is-it-cmd? _isatty() > if they want to). > > Don't know how to make it a substitute for isatty(), through. > Putting this into io.h results in implicit declarations and errors. > > Should all used types be declared locally in the function, > or headers be rearranged (but how?)? > > Also typedef proc_NtQueryObject could be broken in some compiler; should > it not be used? > > This function is intended for: > - "mingw64-" Cygwin packages > - "mingw-w64-" MSYS packages > Both should be built using mingw-w64 toolchain, and currenly have isatty() > being _isatty(). > > mingw-w64-headers/include/iscygtty.c | 96 > ++++++++++++++++++++++++++++++++++++ > 1 file changed, 96 insertions(+) > create mode 100644 mingw-w64-headers/include/iscygtty.c > > diff --git a/mingw-w64-headers/include/iscygtty.c > b/mingw-w64-headers/include/iscygtty.c > new file mode 100644 > index 000000000000..1c7a394d965b > --- /dev/null > +++ b/mingw-w64-headers/include/iscygtty.c > @@ -0,0 +1,96 @@ > +#ifndef __ISCYGTTY_C__ > +#define __ISCYGTTY_C__ > + > +#include <io.h> > +#include <winternl.h> > + > +#include <wchar.h> > +#include <windows.h> > + > +static int iscygtty(int fd) { > + typedef NTSTATUS (NTAPI proc_NtQueryObject) (HANDLE, > OBJECT_INFORMATION_CLASS, PVOID, ULONG, PULONG); > + proc_NtQueryObject *pNtQueryObject; > + > + HANDLE h_fd; > + > + /* NtQueryObject needs space for OBJECT_NAME_INFORMATION.Name->Buffer > also. */ > + char ntfn_bytes[sizeof(OBJECT_NAME_INFORMATION) + MAX_PATH * > sizeof(WCHAR)]; > + > + OBJECT_NAME_INFORMATION *ntfn = (OBJECT_NAME_INFORMATION*) ntfn_bytes; > + NTSTATUS status; > + ULONG ntfn_size = sizeof(ntfn_bytes); > + > + wchar_t c, *s; > + USHORT i; > + > + h_fd = (HANDLE) _get_osfhandle(fd); > + if (!h_fd || h_fd == INVALID_HANDLE_VALUE) { > + errno = EBADF; > + return 0; > + } > + > + pNtQueryObject = (proc_NtQueryObject*) > GetProcAddress(GetModuleHandle("ntdll.dll"), "NtQueryObject"); > + if (!pNtQueryObject) > + goto no_tty; > + > + memset(ntfn, 0, ntfn_size); > + status = pNtQueryObject((HANDLE)h_fd, ObjectNameInformation, > + ntfn, ntfn_size, &ntfn_size); > + > + if (!NT_SUCCESS(status)) { > + /* If it is not NUL (i.e. \Device\Null, which would succeed), > + * then normal isatty() could be consulted. > + * */ > + if (_isatty(fd)) > + return 1; > + goto no_tty; > + } > + > + s = ntfn->Name.Buffer; > + s[ntfn->Name.Length / sizeof(WCHAR)] = 0; > + > + /* Look for > \Device\NamedPipe\(cygwin|msys)-[a-fA-F0-9]{16}-pty[0-9]{1,4}-(from-master|to-master|to-master-cyg) > */ > + > + if (wcsncmp(s, L"\\Device\\NamedPipe\\", 18)) > + goto no_tty; > + s += 18; > + > + if (!wcsncmp(s, L"cygwin-", 7)) > + s += 7; > + else if (!wcsncmp(s, L"msys-", 5)) > + s += 5; > + else > + goto no_tty; > + > + for (i = 0; i < 16; i++) { > + c = *s++; > + if (!( (c >= 'a' && c <= 'f') || (c >= 'A' && c <= 'F') || (c >= '0' > && c <= '9') )) > + goto no_tty; > + } > + > + if (wcsncmp(s, L"-pty", 4)) > + goto no_tty; > + s += 4; > + > + for (i = 0; i < 4; i++, s++) { > + c = *s; > + if (!( c >= '0' && c <= '9' )) > + break; > + } > + > + if (i == 0) > + goto no_tty; > + > + if (wcscmp(s, L"-from-master") && > + wcscmp(s, L"-to-master") && > + wcscmp(s, L"-to-master-cyg")) > + goto no_tty; > + > + return 1; > + > +no_tty: > + errno = EINVAL; > + return 0; > +} > + > +#endif /* __ISCYGTTY_C__ */ > -- > 2.9.2 > > > ------------------------------------------------------------------------------ > Developer Access Program for Intel Xeon Phi Processors > Access to Intel Xeon Phi processor-based developer platforms. > With one year of Intel Parallel Studio XE. > Training and support from Colfax. > Order your platform today. http://sdm.link/xeonphi > _______________________________________________ > Mingw-w64-public mailing list > Mingw-w64-public@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/mingw-w64-public ------------------------------------------------------------------------------ Developer Access Program for Intel Xeon Phi Processors Access to Intel Xeon Phi processor-based developer platforms. 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