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4ec08891a0
Bash has a very convenient feature that is called process substitution (e.g. `diff -u <(seq 0 10) <(seq 1 11)`). To make this work, Bash requires the `/dev/fd` symlink to exist, and Cygwin therefore creates this symlink (together with the `stdin`, `stdout` and `stderr` ones) upon start-up. This strategy is incompatible with the idea of providing a subset of Cygwin in a `.zip` file (because there is no standard way to represent symlinks in `.zip` files, and besides, older Windows versions would potentially lack support for them anyway). That type of `.zip` file is what Git for Windows wants to use, though, bundling a minimal subset for third-party applications in MinGit (see https://github.com/git-for-windows/git/wiki/MinGit for details). Let's side-step this problem completely by creating those symlinks implicitly, similar to the way `/dev/` is populated with special devices. Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
54 lines
1005 B
C++
54 lines
1005 B
C++
/* fhandler_process_fd.cc: fhandler for the /dev/{fd,std{in,out,err}} symlinks
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This file is part of Cygwin.
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This software is a copyrighted work licensed under the terms of the
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Cygwin license. Please consult the file "CYGWIN_LICENSE" for
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details. */
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#include "winsup.h"
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#include "path.h"
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#include "fhandler.h"
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fhandler_dev_fd::fhandler_dev_fd ():
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fhandler_virtual ()
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{
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}
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virtual_ftype_t
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fhandler_dev_fd::exists ()
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{
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return virt_symlink;
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}
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int __reg2
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fhandler_dev_fd::fstat (struct stat *buf)
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{
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const char *path = get_name ();
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debug_printf ("fstat (%s)", path);
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fhandler_base::fstat (buf);
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buf->st_mode = S_IFLNK | STD_RBITS | S_IWUSR | S_IWGRP | S_IWOTH | STD_XBITS;
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buf->st_ino = get_ino ();
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return 0;
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}
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bool
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fhandler_dev_fd::fill_filebuf ()
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{
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const char *path = get_name ();
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debug_printf ("fill_filebuf (%s)", path);
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const char *native = get_native_name ();
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if (!native)
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{
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return false;
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}
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free(filebuf);
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filebuf = cstrdup (native);
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return true;
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}
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