mirror of
git://sourceware.org/git/newlib-cygwin.git
synced 2025-01-19 12:59:21 +08:00
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
|
|
|
|
This file is part of Cygwin.
|
|
|
|
This software is a copyrighted work licensed under the terms of the
|
|
Cygwin license. Please consult the file "CYGWIN_LICENSE" for
|
|
details. */
|
|
|
|
#include "winsup.h"
|
|
#include "path.h"
|
|
#include "fhandler.h"
|
|
|
|
fhandler_dev_fd::fhandler_dev_fd ():
|
|
fhandler_virtual ()
|
|
{
|
|
}
|
|
|
|
virtual_ftype_t
|
|
fhandler_dev_fd::exists ()
|
|
{
|
|
return virt_symlink;
|
|
}
|
|
|
|
int __reg2
|
|
fhandler_dev_fd::fstat (struct stat *buf)
|
|
{
|
|
const char *path = get_name ();
|
|
debug_printf ("fstat (%s)", path);
|
|
|
|
fhandler_base::fstat (buf);
|
|
|
|
buf->st_mode = S_IFLNK | STD_RBITS | S_IWUSR | S_IWGRP | S_IWOTH | STD_XBITS;
|
|
buf->st_ino = get_ino ();
|
|
|
|
return 0;
|
|
}
|
|
|
|
bool
|
|
fhandler_dev_fd::fill_filebuf ()
|
|
{
|
|
const char *path = get_name ();
|
|
debug_printf ("fill_filebuf (%s)", path);
|
|
|
|
const char *native = get_native_name ();
|
|
if (!native)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
free(filebuf);
|
|
filebuf = cstrdup (native);
|
|
return true;
|
|
}
|