The MinGW.OSDN Windows System Libraries. Formerly designated as "MinGW.org Windows System Libraries", this encapsulates the "mingwrt" C runtime library extensions, and the "w32api" 32-bit MS-Windows API libraries.
Please note that this project no longer owns the "MinGW.org" domain name; any software which may be distributed from that domain is NOT supported by this project.
| Revision | cf7bdc75e24a873a3dc1c1b14b8e758ddc19fc96 (tree) |
|---|---|
| Time | 2021-06-26 04:32:34 |
| Author |  Keith Marshall <keith@user...> |
| Commiter | Keith Marshall |
Correct Microsoft's dup2() POSIX.1 non-conformity.
* include/unistd.h [! defined dup2]: Define macro reference to...
(mingw_posix_dup2): ...this new in-line function, (as named by the
macro); it overrides the Microsoft dup2() function, to ensure that it
returns the correct file descriptor, as specified by POSIX.1, rather
than zero, as returned by the Microsoft implementation, on success.
mingwrt/ChangeLog (diff)
mingwrt/include/unistd.h (diff)| @@ -1,3 +1,13 @@ | ||
| 1 | +2021-06-25 Keith Marshall <keith@users.osdn.me> | |
| 2 | + | |
| 3 | + Correct Microsoft's dup2() POSIX.1 non-conformity. | |
| 4 | + | |
| 5 | + * include/unistd.h [! defined dup2]: Define macro reference to... | |
| 6 | + (__mingw_posix_dup2): ...this new in-line function, (as named by the | |
| 7 | + macro); it overrides the Microsoft dup2() function, to ensure that it | |
| 8 | + returns the correct file descriptor, as specified by POSIX.1, rather | |
| 9 | + than zero, as returned by the Microsoft implementation, on success. | |
| 10 | + | |
| 1 | 11 | 2021-06-13 Keith Marshall <keith@users.osdn.me> |
| 2 | 12 | |
| 3 | 13 | Implement a POSIX.1 compliant pseudo-random number generator. |
| @@ -10,9 +10,9 @@ | ||
| 10 | 10 | * Danny Smith <dannysmith@users.sourceforge.net> |
| 11 | 11 | * Ramiro Polla <ramiro@lisha.ufsc.br> |
| 12 | 12 | * Gregory McGarry <gregorymcgarry@users.sourceforge.net> |
| 13 | - * Keith Marshall <keithmarshall@users.sourceforge.net> | |
| 13 | + * Keith Marshall <keith@users.osdn.me> | |
| 14 | 14 | * Copyright (C) 1997, 1999, 2002-2004, 2007-2009, 2014-2017, 2020, |
| 15 | - * MinGW.org Project. | |
| 15 | + * 2021, MinGW.org Project. | |
| 16 | 16 | * |
| 17 | 17 | * |
| 18 | 18 | * Permission is hereby granted, free of charge, to any person obtaining a |
| @@ -127,6 +127,23 @@ unsigned sleep( unsigned period ){ return __mingw_sleep( period, 0 ); } | ||
| 127 | 127 | */ |
| 128 | 128 | int __cdecl ftruncate( int, off_t ); |
| 129 | 129 | |
| 130 | +#ifndef dup2 | |
| 131 | +/* Microsoft's implementation of dup2(), (which is documented as being a | |
| 132 | + * POSIX.1 function), does NOT actually conform to POSIX.1 behaviour; (on | |
| 133 | + * success, it returns zero, but POSIX.1 specifies that it should return | |
| 134 | + * the file descriptor to which assignment has been forced). To be fair | |
| 135 | + * to Microsoft, the anomalous behaviour is as they document it; however, | |
| 136 | + * it may seem reasonable for the user to expect conformity with POSIX.1, | |
| 137 | + * particularly when <unistd.h> has been included. Unless the user has | |
| 138 | + * provided a prior definition for dup2(), this in-line implementation | |
| 139 | + * will deliver such conformity. | |
| 140 | + */ | |
| 141 | +#define dup2 __mingw_posix_dup2 | |
| 142 | +__CRT_ALIAS __LIBIMPL__(( FUNCTION = dup2 )) | |
| 143 | +__cdecl __MINGW_NOTHROW int dup2 (int __fd1, int __fd2) | |
| 144 | +{ return ((__fd1 = _dup2( __fd1, __fd2 )) == 0) ? __fd2 : __fd1; } | |
| 145 | +#endif /* ! defined dup2 */ | |
| 146 | + | |
| 130 | 147 | #ifndef __NO_INLINE__ |
| 131 | 148 | __CRT_INLINE __JMPSTUB__(( FUNCTION = ftruncate, DLLENTRY = _chsize )) |
| 132 | 149 | int ftruncate( int __fd, off_t __length ){ return _chsize( __fd, __length ); } |
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