Keith Marshall
keith****@users*****
Mon Apr 16 01:19:17 JST 2018
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 15/04/18 16:23, Eli Zaretskii wrote: >> From: Keith Marshall <keith****@users*****> Date: Sat, 14 Apr 2018 >> 19:42:54 +0100 >> >>> Moreover, if I invoke a MinGW program with this argument, it >>> receives the literal @{-1} as well in its argv[] array. >> >> ... while that may be true when brace expansion has not been >> enabled, (by default, it is not), I do see two bugs in mingwrt's >> implementation of glob(3), when the feature is enabled: >> >> $ cmd Microsoft Windows XP [Version 5.1.2600] (C) Copyright >> 1985-2001 Microsoft Corp. >> >> C:\mingw\msys\1.0\home\keith> showargv @{-1} command: showargv >> @{-1} argv[00]: showargv argv[01]: @-1 > > I tried to reproduce this behavior, but couldn't. Eventually, I > came to the conclusion that I don't understand what you meant by > "feature is enabled". AFAIK, the default for MinGW is to use MinGW > globbing (as opposed to the one provided by MSVCRT.DLL), and that > invokes 'glob' under the hood, no? Yes. > Can you tell what exactly does showargv does to "enable the > feature"? Sure. The clues are in the setargv.c code: https://osdn.net/projects/mingw/scm/git/mingw-org-wsl/blobs/5.1-trunk/mingwrt/setargv.c and the default CRTglob.c initialization code: https://osdn.net/projects/mingw/scm/git/mingw-org-wsl/blobs/5.1-trunk/mingwrt/CRTglob.c The trick is to override the default initialization of _CRT_glob: int _CRT_glob = __CRT_GLOB_USE_MINGW__; I've posted my showargv.c code before, but to save you searching the old SF archives, it's attached again. I compile it thus: $ mingw32-gcc -O2 -D CRT_GLOB_OPTIONS=0x4432 showargv.c \ -o showargv.exe which, you will note, provides an initialization override equivalent to: int _CRT_glob = __CRT_GLOB_USE_MINGW__ | __CRT_GLOB_USE_SINGLE_QUOTE__ | __CRT_GLOB_BRACKET_GROUPS__ | GLOB_CASEMATCH | GLOB_BRACE ; Thus, the GLOB_BRACE feature becomes enabled, when the MinGW runtime start-up code calls __mingw_glob() on behalf of showargv.exe - -- Regards, Keith. Public key available from keys.gnupg.net Key fingerprint: C19E C018 1547 DE50 E1D4 8F53 C0AD 36C6 347E 5A3F -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.20 (GNU/Linux) iQIcBAEBAgAGBQJa03uFAAoJEMCtNsY0flo/0ZoP/2OiW4FlVrv0WI5n7F+2HhB+ WhVaiIoiOAnhvE9Fulo/jiGIz0QgMRTjsyLrZ5imktan7CBnpuKFm7+x5gQtv+lo k3acG/OrrR93dTWrb67nSz2RkDz3jZhUg+vQlMtvOYxo5d+9fmzDXKwG0lGs8w1f S6VpohEbser6tIUO0um5EdbUmncjYFM4UUWRcKgjIkp2SiRBh5roOnLfc4CIrm0L Aq3AVRWsBMgQVHr7UjBqmLxRvWf/vFlbICZuCvJSxW9C2h6qLfvTEj6Ucjgb7BBI NLWcgsDNVHve4FMZ1R4x9D8cACz9G9MgHi7abdEzGOC5rnedaBVdY4capaxnRrxu E9ozrkmRnBk412vlVNGdm69uwoziREHIHdzQTu1+90dS50+vNvI3kLt0UOoxU6F2 bxk3+wIrNRjfKURbTkzb2sRgoTAU4pKNs720jbc2SrBY88p5qsZDFqrgqAZZ22e8 CRaN1/kvdvlmqR3tCRU43t25R8fksz48J2SpT5osvyKoFkTzo2DONZLHPS+ewL9N wkJy3jtVOf7fueB9VMimvW7KvfZOijjfsrYc8o3na775xWRd4Lmb1DMqbuUOxTdb 24+Irw0SCt9mR0UwdhDr/WGV0UgV/xH2c8K/6yWiMhsnEXkJKFVzwJXbIh2ufnPC LPFjqtbMmrlgoPXZnGkU =zETv -----END PGP SIGNATURE----- -------------- next part -------------- A non-text attachment was scrubbed... Name: showargv.c Type: text/x-csrc Size: 337 bytes Desc: not available Url : https://lists.osdn.me/mailman/archives/mingw-users/attachments/20180415/43b9ba5a/attachment.c
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