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95 lines
3.6 KiB
C
95 lines
3.6 KiB
C
/*
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* main.c - the main() function
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*
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* This file is part of zsh, the Z shell.
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*
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* Copyright (c) 1992-1997 Paul Falstad
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* All rights reserved.
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*
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* Permission is hereby granted, without written agreement and without
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* license or royalty fees, to use, copy, modify, and distribute this
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* software and to distribute modified versions of this software for any
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* purpose, provided that the above copyright notice and the following
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* two paragraphs appear in all copies of this software.
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*
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* In no event shall Paul Falstad or the Zsh Development Group be liable
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* to any party for direct, indirect, special, incidental, or consequential
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* damages arising out of the use of this software and its documentation,
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* even if Paul Falstad and the Zsh Development Group have been advised of
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* the possibility of such damage.
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*
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* Paul Falstad and the Zsh Development Group specifically disclaim any
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* warranties, including, but not limited to, the implied warranties of
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* merchantability and fitness for a particular purpose. The software
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* provided hereunder is on an "as is" basis, and Paul Falstad and the
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* Zsh Development Group have no obligation to provide maintenance,
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* support, updates, enhancements, or modifications.
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*
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*/
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#include "zsh.mdh"
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#include "main.pro"
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/*
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* Support for Cygwin binary/text mode filesystems.
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* Peter A. Castro <doctor@fruitbat.org>
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*
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* This deserves some explanation, because it uses Cygwin specific
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* runtime functions.
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*
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* Cygwin supports the notion of binary or text mode access to files
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* based on the mount attributes of the filesystem. If a file is on
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* a binary mounted filesystem, you get exactly what's in the file, CRLF's
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* and all. If it's on a text mounted filesystem, Cygwin will strip out
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* the CRs. This presents a problem because zsh code doesn't allow for
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* CRLF's as line terminators. So, we must force all open files to be
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* in text mode regardless of the underlying filesystem attributes.
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* However, we only want to do this for reading, not writing as we still
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* want to write files in the mode of the filesystem. To do this,
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* we have two options: augment all {f}open() calls to have O_TEXT added to
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* the list of file mode options, or have the Cygwin runtime do it for us.
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* I choose the latter. :)
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*
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* Cygwin's runtime provides pre-execution hooks which allow you to set
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* various attributes for the process which effect how the process functions.
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* One of these attributes controls how files are opened. I've set
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* it up so that all files opened RDONLY will have the O_TEXT option set,
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* thus forcing line termination manipulation. This seems to solve the
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* problem (at least the Test suite runs clean :).
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*
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* Note: this may not work in later implementations. This will override
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* all mode options passed into open(). Cygwin (really Windows) doesn't
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* support all that much in options, so for now this is OK, but later on
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* it may not, in which case O_TEXT will have to be added to all opens calls
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* appropriately.
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*
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* This function is actually a hook in the Cygwin runtime which
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* is called before the main of a program. Because it's part of the program
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* pre-startup, it must be located in the program main and not in a DLL.
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* It must also be made an export so the linker resolves this function to
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* our code instead of the default Cygwin stub routine.
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*/
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/**/
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#ifdef __CYGWIN__
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/**/
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mod_export void
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cygwin_premain0 (int argc, char **argv, void *myself)
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{
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static struct __cygwin_perfile pf[] =
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{
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{"", O_RDONLY | O_TEXT},
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{NULL, 0}
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};
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cygwin_internal (CW_PERFILE, pf);
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}
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/**/
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#endif /* __CYGWIN__ */
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/**/
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int
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main(int argc, char **argv)
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{
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return (zsh_main(argc, argv));
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}
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