newlib/winsup/cygwin/dir.cc

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/* dir.cc: Posix directory-related routines
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Copyright 1996, 1997, 1998, 1999, 2000, 2001 Cygnus Solutions.
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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"
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#include <unistd.h>
#include <stdlib.h>
#include <sys/stat.h>
#include <errno.h>
#define _COMPILING_NEWLIB
#include <dirent.h>
#include "sync.h"
#include "sigproc.h"
#include "pinfo.h"
#include "cygerrno.h"
#include "security.h"
#include "fhandler.h"
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#include "perprocess.h"
#include "path.h"
#include "dtable.h"
#include "cygheap.h"
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/* Cygwin internal */
/* Return whether the directory of a file is writable. Return 1 if it
is. Otherwise, return 0, and set errno appropriately. */
int __stdcall
writable_directory (const char *file)
{
#if 0
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char dir[strlen (file) + 1];
strcpy (dir, file);
const char *usedir;
char *slash = strrchr (dir, '\\');
if (slash == NULL)
usedir = ".";
else if (slash == dir)
{
usedir = "\\";
}
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else
{
*slash = '\0';
usedir = dir;
}
int acc = access (usedir, W_OK);
return acc == 0;
#else
return 1;
#endif
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}
/* opendir: POSIX 5.1.2.1 */
extern "C" DIR *
opendir (const char *dirname)
{
int len;
DIR *dir;
DIR *res = 0;
struct stat statbuf;
path_conv real_dirname (dirname, PC_SYM_FOLLOW | PC_FULL);
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if (real_dirname.error)
{
set_errno (real_dirname.error);
goto failed;
}
if (stat (real_dirname, &statbuf) == -1)
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goto failed;
if (!(statbuf.st_mode & S_IFDIR))
{
set_errno (ENOTDIR);
goto failed;
}
len = strlen (real_dirname);
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if (len > MAX_PATH - 3)
{
set_errno (ENAMETOOLONG);
goto failed;
}
if ((dir = (DIR *) malloc (sizeof (DIR))) == NULL)
{
set_errno (ENOMEM);
goto failed;
}
if ((dir->__d_dirname = (char *) malloc (len + 3)) == NULL)
{
free (dir);
set_errno (ENOMEM);
goto failed;
}
if ((dir->__d_dirent =
(struct dirent *) malloc (sizeof (struct dirent))) == NULL)
{
free (dir->__d_dirname);
free (dir);
set_errno (ENOMEM);
goto failed;
}
strcpy (dir->__d_dirname, real_dirname.get_win32 ());
/* FindFirstFile doesn't seem to like duplicate /'s. */
len = strlen (dir->__d_dirname);
if (len == 0 || SLASH_P (dir->__d_dirname[len - 1]))
strcat (dir->__d_dirname, "*");
else
strcat (dir->__d_dirname, "\\*"); /**/
dir->__d_cookie = __DIRENT_COOKIE;
dir->__d_u.__d_data.__handle = INVALID_HANDLE_VALUE;
dir->__d_position = 0;
dir->__d_dirhash = statbuf.st_ino;
res = dir;
failed:
syscall_printf ("%p = opendir (%s)", res, dirname);
return res;
}
/* readdir: POSIX 5.1.2.1 */
extern "C" struct dirent *
readdir (DIR * dir)
{
WIN32_FIND_DATA buf;
HANDLE handle;
struct dirent *res = NULL;
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if (dir->__d_cookie != __DIRENT_COOKIE)
{
set_errno (EBADF);
syscall_printf ("%p = readdir (%p)", res, dir);
return res;
}
if (dir->__d_u.__d_data.__handle == INVALID_HANDLE_VALUE
&& dir->__d_position == 0)
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{
handle = FindFirstFileA (dir->__d_dirname, &buf);
DWORD lasterr = GetLastError ();
dir->__d_u.__d_data.__handle = handle;
if (handle == INVALID_HANDLE_VALUE && (lasterr != ERROR_NO_MORE_FILES))
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{
seterrno_from_win_error (__FILE__, __LINE__, lasterr);
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return res;
}
}
else if (dir->__d_u.__d_data.__handle == INVALID_HANDLE_VALUE)
{
return res;
}
else if (!FindNextFileA (dir->__d_u.__d_data.__handle, &buf))
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{
DWORD lasterr = GetLastError ();
(void) FindClose (dir->__d_u.__d_data.__handle);
dir->__d_u.__d_data.__handle = INVALID_HANDLE_VALUE;
/* POSIX says you shouldn't set errno when readdir can't
find any more files; so, if another error we leave it set. */
if (lasterr != ERROR_NO_MORE_FILES)
seterrno_from_win_error (__FILE__, __LINE__, lasterr);
syscall_printf ("%p = readdir (%p)", res, dir);
return res;
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}
/* We get here if `buf' contains valid data. */
strcpy (dir->__d_dirent->d_name, buf.cFileName);
/* Check for Windows shortcut. If it's a Cygwin or U/WIN
symlink, drop the .lnk suffix. */
* Makefile.in: Add `-lshell32 -luuid' to link pass for new-cygwin1.dll. * autoload.cc: Add LoadDLLinitfunc for ole32.dll. Add LoadDLLfuncEx statements for CoInitialize@4, CoUninitialize@0 and CoCreateInstance@20. * dir.cc (dir_suffixes): New datastructure. (readdir): Check for R/O *.lnk files to hide the suffix. (opendir): Use `dir_suffixes' in path conversion. (rmdir): Ditto. * fhandler.cc (fhandler_disk_file::fstat): Add S_IFLNK flag before calling `get_file_attribute'. Take FILE_ATTRIBUTE_READONLY into account only if the file is no symlink. * path.cc (inner_suffixes): New datastructure. (SYMLINKATTR): Eliminated. (path_conv::check): Use `inner_suffixes' on inner path components. (shortcut_header): New global static variable. (shortcut_initalized): Ditto. (create_shortcut_header): New function. (cmp_shortcut_header): Ditto. (symlink): Create symlinks by creating windows shortcuts. Preserve the old code. (symlink_info::check_shortcut): New method. (symlink_info::check_sysfile): Ditto. (symlink_info::check): Check for shortcuts. Move code reading old system attribute symlinks into symlink_info::check_sysfile(). (chdir): Use `dir_suffixes' in path conversion. * security.cc (get_file_attribute): Check for S_IFLNK flag. Force 0777 permissions then. * spawn.cc (std_suffixes): Add ".lnk" suffix. * syscalls.cc (_unlink): Use `inner_suffixes' in path conversion. Check for shortcut symlinks to eliminate R/O attribute before calling DeleteFile(). (stat_suffixes): Add ".lnk" suffix. (stat_worker): Force 0777 permissions if file is a symlink.
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if (buf.dwFileAttributes & FILE_ATTRIBUTE_READONLY)
{
char *c = dir->__d_dirent->d_name;
int len = strlen (c);
if (strcasematch (c + len - 4, ".lnk"))
{
char fbuf[MAX_PATH + 1];
strcpy (fbuf, dir->__d_dirname);
strcpy (fbuf + strlen (fbuf) - 1, dir->__d_dirent->d_name);
path_conv fpath (fbuf, PC_SYM_NOFOLLOW);
if (fpath.issymlink ())
c[len - 4] = '\0';
}
* Makefile.in: Add `-lshell32 -luuid' to link pass for new-cygwin1.dll. * autoload.cc: Add LoadDLLinitfunc for ole32.dll. Add LoadDLLfuncEx statements for CoInitialize@4, CoUninitialize@0 and CoCreateInstance@20. * dir.cc (dir_suffixes): New datastructure. (readdir): Check for R/O *.lnk files to hide the suffix. (opendir): Use `dir_suffixes' in path conversion. (rmdir): Ditto. * fhandler.cc (fhandler_disk_file::fstat): Add S_IFLNK flag before calling `get_file_attribute'. Take FILE_ATTRIBUTE_READONLY into account only if the file is no symlink. * path.cc (inner_suffixes): New datastructure. (SYMLINKATTR): Eliminated. (path_conv::check): Use `inner_suffixes' on inner path components. (shortcut_header): New global static variable. (shortcut_initalized): Ditto. (create_shortcut_header): New function. (cmp_shortcut_header): Ditto. (symlink): Create symlinks by creating windows shortcuts. Preserve the old code. (symlink_info::check_shortcut): New method. (symlink_info::check_sysfile): Ditto. (symlink_info::check): Check for shortcuts. Move code reading old system attribute symlinks into symlink_info::check_sysfile(). (chdir): Use `dir_suffixes' in path conversion. * security.cc (get_file_attribute): Check for S_IFLNK flag. Force 0777 permissions then. * spawn.cc (std_suffixes): Add ".lnk" suffix. * syscalls.cc (_unlink): Use `inner_suffixes' in path conversion. Check for shortcut symlinks to eliminate R/O attribute before calling DeleteFile(). (stat_suffixes): Add ".lnk" suffix. (stat_worker): Force 0777 permissions if file is a symlink.
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}
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/* Compute d_ino by combining filename hash with the directory hash
(which was stored in dir->__d_dirhash when opendir was called). */
if (buf.cFileName[0] == '.')
{
if (buf.cFileName[1] == '\0')
dir->__d_dirent->d_ino = dir->__d_dirhash;
else if (buf.cFileName[1] != '.' || buf.cFileName[2] != '\0')
goto hashit;
else
{
char *p, up[strlen (dir->__d_dirname) + 1];
strcpy (up, dir->__d_dirname);
if (!(p = strrchr (up, '\\')))
goto hashit;
*p = '\0';
if (!(p = strrchr (up, '\\')))
dir->__d_dirent->d_ino = hash_path_name (0, ".");
else
{
*p = '\0';
dir->__d_dirent->d_ino = hash_path_name (0, up);
}
}
}
else
{
hashit:
ino_t dino = hash_path_name (dir->__d_dirhash, "\\");
dir->__d_dirent->d_ino = hash_path_name (dino, buf.cFileName);
}
++dir->__d_position;
res = dir->__d_dirent;
syscall_printf ("%p = readdir (%p) (%s)",
&dir->__d_dirent, dir, buf.cFileName);
return res;
}
/* telldir */
extern "C" off_t
telldir (DIR * dir)
{
if (dir->__d_cookie != __DIRENT_COOKIE)
return 0;
return dir->__d_position;
}
/* seekdir */
extern "C" void
seekdir (DIR * dir, off_t loc)
{
if (dir->__d_cookie != __DIRENT_COOKIE)
return;
rewinddir (dir);
while (loc > dir->__d_position)
if (! readdir (dir))
break;
}
/* rewinddir: POSIX 5.1.2.1 */
extern "C" void
rewinddir (DIR * dir)
{
syscall_printf ("rewinddir (%p)", dir);
if (dir->__d_cookie != __DIRENT_COOKIE)
return;
if (dir->__d_u.__d_data.__handle != INVALID_HANDLE_VALUE)
{
(void) FindClose (dir->__d_u.__d_data.__handle);
dir->__d_u.__d_data.__handle = INVALID_HANDLE_VALUE;
}
dir->__d_position = 0;
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}
/* closedir: POSIX 5.1.2.1 */
extern "C" int
closedir (DIR * dir)
{
if (dir->__d_cookie != __DIRENT_COOKIE)
{
set_errno (EBADF);
syscall_printf ("-1 = closedir (%p)", dir);
return -1;
}
if (dir->__d_u.__d_data.__handle != INVALID_HANDLE_VALUE &&
FindClose (dir->__d_u.__d_data.__handle) == 0)
{
__seterrno ();
syscall_printf ("-1 = closedir (%p)", dir);
return -1;
}
/* Reset the marker in case the caller tries to use `dir' again. */
dir->__d_cookie = 0;
free (dir->__d_dirname);
free (dir->__d_dirent);
free (dir);
syscall_printf ("0 = closedir (%p)", dir);
return 0;
}
/* mkdir: POSIX 5.4.1.1 */
extern "C" int
mkdir (const char *dir, mode_t mode)
{
int res = -1;
path_conv real_dir (dir, PC_SYM_NOFOLLOW);
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if (real_dir.error)
{
set_errno (real_dir.case_clash ? ECASECLASH : real_dir.error);
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goto done;
}
nofinalslash(real_dir.get_win32 (), real_dir.get_win32 ());
if (! writable_directory (real_dir.get_win32 ()))
goto done;
if (CreateDirectoryA (real_dir.get_win32 (), 0))
{
set_file_attribute (real_dir.has_acls (), real_dir.get_win32 (),
S_IFDIR | ((mode & 0777) & ~cygheap->umask));
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res = 0;
}
else
__seterrno ();
done:
syscall_printf ("%d = mkdir (%s, %d)", res, dir, mode);
return res;
}
/* rmdir: POSIX 5.5.2.1 */
extern "C" int
rmdir (const char *dir)
{
int res = -1;
path_conv real_dir (dir, PC_SYM_NOFOLLOW);
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if (real_dir.error)
{
set_errno (real_dir.error);
goto done;
}
/* Is `dir' a directory? */
if (real_dir.file_attributes () == (DWORD) -1 ||
!(real_dir.file_attributes () & FILE_ATTRIBUTE_DIRECTORY))
{
set_errno (ENOTDIR);
goto done;
}
/* Even own directories can't be removed if R/O attribute is set. */
if (real_dir.file_attributes () & FILE_ATTRIBUTE_READONLY)
SetFileAttributes (real_dir.get_win32 (), real_dir.file_attributes () &
~FILE_ATTRIBUTE_READONLY);
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if (RemoveDirectoryA (real_dir.get_win32 ()))
{
/* RemoveDirectory on a samba drive doesn't return an error if the
* Makefile.in: Add cygheap.o. * child_info.h: Add specific exec class. * cygheap.h: New file. Contains declarations for cygwin heap. * cygheap.cc: New file. Implements cygwin heap functions. * dcrt0.cc (quoted): Simplify due to new method for passing arguments between cygwin programs. (alloc_stack_hard_way): Attempt to handle overlapped stack. (dll_crt0_1): Move child_info processing here. Accomodate new method for passing arguments between cygwin programs. Initialize cygwin heap. Establish __argc and __argv variables. (_dll_crt0): Move most of child_info processing to dll_crt0_1. (cygwin_dll_init): Remove duplication. * dtable.cc (dtable::extend): Allocate dtable using cygwin heap. (dtable::build_fhandler): Ditto for fhandler type being constructed. (dtable::dup_worker): Free new fhandler from cygwin heap on error. (dtable::select_*): Don't assume that this == fdtab. (dtable::linearize_fd_array): Delete. (dtable::delinearize_fd_array): Delete. (dtable::fixup_after_exec): New file. (dtable::vfork_child_dup): Use cygwin heap. (dtable::vfork_parent_restore): Ditto. * dtable.h: Remove obsolete methods. Add new method. * environ.cc (posify): Eliminate already_posix parameter and logic. (envsize): New function. (_addenv): Use envsize. (environ_init): Accept an argument pointing to an existing environment list. If supplied, allocate space for this in the the program's heap. * fhandler.cc (fhandler_base::operator =): Move here from fhandler.h. Use cygwin heap to allocate filenames. (fhandler_base::set_name): Allocate/free names from cygwin heap. (fhandler_base::linearize): Delete. (fhandler_base::de_linearize): Delete. (fhandler_base::operator delete): Free from cygwin heap. (fhandler_base::~fhandler_base): Ditto. * fhandler.h: Accomodate elimination of *linearize and other changes above. * fhandler_console.cc (fhandler_console::fixup_after_exec): Rename from de_linearize. * heap.h: New file. * fhandler_tty.cc (fhandler_tty_slave::fhandler_tty_slave): Use cygwin heap for name. fhandler_tty::fixup_after_exec): Rename from de_linearize. * fork.cc (fork): Call cygheap_fixup_in_child. * heap.cc: Use declarations in heap.h. * malloc.cc: Sprinkle assertions throughout to catch attempts to free/realloc something from the cygwin heap. * path.cc: Throughout, eliminate use of per-thread cache for cwd. Use cwd_* functions rather than cwd_* variables to access cwd_win32 and cwd_posix. (cwd_win32): New function. (cwd_posix): New function. (cwd_hash): New function. (cwd_fixup_after_exec): New function. * path.h: Accomodate path.cc changes. * pinfo.cc (pinfo_init): Accept a pointer to an environment table. Pass this to environ_init. Eliminate old 'title' tests. * pinfo.h: Accomodate above change in argument. * spawn.cc (struct av): New method for building argv list. (av::unshift): New method. (spawn_guts): Allocate everything that the child process needs in the cygwin heap and pass a pointer to this to the child. Build argv list using new method. Eliminate delinearize stuff. * thread.h: Eliminate _cwd_win32 and _cwd_posix buffers. * winsup.h: Eliminate obsolete functions. Add envsize() declaration.
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directory can't be removed because it's not empty. Checking for
existence afterwards keeps us informed about success. */
if (GetFileAttributesA (real_dir.get_win32 ()) != (DWORD) -1)
* Makefile.in: Add cygheap.o. * child_info.h: Add specific exec class. * cygheap.h: New file. Contains declarations for cygwin heap. * cygheap.cc: New file. Implements cygwin heap functions. * dcrt0.cc (quoted): Simplify due to new method for passing arguments between cygwin programs. (alloc_stack_hard_way): Attempt to handle overlapped stack. (dll_crt0_1): Move child_info processing here. Accomodate new method for passing arguments between cygwin programs. Initialize cygwin heap. Establish __argc and __argv variables. (_dll_crt0): Move most of child_info processing to dll_crt0_1. (cygwin_dll_init): Remove duplication. * dtable.cc (dtable::extend): Allocate dtable using cygwin heap. (dtable::build_fhandler): Ditto for fhandler type being constructed. (dtable::dup_worker): Free new fhandler from cygwin heap on error. (dtable::select_*): Don't assume that this == fdtab. (dtable::linearize_fd_array): Delete. (dtable::delinearize_fd_array): Delete. (dtable::fixup_after_exec): New file. (dtable::vfork_child_dup): Use cygwin heap. (dtable::vfork_parent_restore): Ditto. * dtable.h: Remove obsolete methods. Add new method. * environ.cc (posify): Eliminate already_posix parameter and logic. (envsize): New function. (_addenv): Use envsize. (environ_init): Accept an argument pointing to an existing environment list. If supplied, allocate space for this in the the program's heap. * fhandler.cc (fhandler_base::operator =): Move here from fhandler.h. Use cygwin heap to allocate filenames. (fhandler_base::set_name): Allocate/free names from cygwin heap. (fhandler_base::linearize): Delete. (fhandler_base::de_linearize): Delete. (fhandler_base::operator delete): Free from cygwin heap. (fhandler_base::~fhandler_base): Ditto. * fhandler.h: Accomodate elimination of *linearize and other changes above. * fhandler_console.cc (fhandler_console::fixup_after_exec): Rename from de_linearize. * heap.h: New file. * fhandler_tty.cc (fhandler_tty_slave::fhandler_tty_slave): Use cygwin heap for name. fhandler_tty::fixup_after_exec): Rename from de_linearize. * fork.cc (fork): Call cygheap_fixup_in_child. * heap.cc: Use declarations in heap.h. * malloc.cc: Sprinkle assertions throughout to catch attempts to free/realloc something from the cygwin heap. * path.cc: Throughout, eliminate use of per-thread cache for cwd. Use cwd_* functions rather than cwd_* variables to access cwd_win32 and cwd_posix. (cwd_win32): New function. (cwd_posix): New function. (cwd_hash): New function. (cwd_fixup_after_exec): New function. * path.h: Accomodate path.cc changes. * pinfo.cc (pinfo_init): Accept a pointer to an environment table. Pass this to environ_init. Eliminate old 'title' tests. * pinfo.h: Accomodate above change in argument. * spawn.cc (struct av): New method for building argv list. (av::unshift): New method. (spawn_guts): Allocate everything that the child process needs in the cygwin heap and pass a pointer to this to the child. Build argv list using new method. Eliminate delinearize stuff. * thread.h: Eliminate _cwd_win32 and _cwd_posix buffers. * winsup.h: Eliminate obsolete functions. Add envsize() declaration.
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set_errno (ENOTEMPTY);
else
* Makefile.in: Add cygheap.o. * child_info.h: Add specific exec class. * cygheap.h: New file. Contains declarations for cygwin heap. * cygheap.cc: New file. Implements cygwin heap functions. * dcrt0.cc (quoted): Simplify due to new method for passing arguments between cygwin programs. (alloc_stack_hard_way): Attempt to handle overlapped stack. (dll_crt0_1): Move child_info processing here. Accomodate new method for passing arguments between cygwin programs. Initialize cygwin heap. Establish __argc and __argv variables. (_dll_crt0): Move most of child_info processing to dll_crt0_1. (cygwin_dll_init): Remove duplication. * dtable.cc (dtable::extend): Allocate dtable using cygwin heap. (dtable::build_fhandler): Ditto for fhandler type being constructed. (dtable::dup_worker): Free new fhandler from cygwin heap on error. (dtable::select_*): Don't assume that this == fdtab. (dtable::linearize_fd_array): Delete. (dtable::delinearize_fd_array): Delete. (dtable::fixup_after_exec): New file. (dtable::vfork_child_dup): Use cygwin heap. (dtable::vfork_parent_restore): Ditto. * dtable.h: Remove obsolete methods. Add new method. * environ.cc (posify): Eliminate already_posix parameter and logic. (envsize): New function. (_addenv): Use envsize. (environ_init): Accept an argument pointing to an existing environment list. If supplied, allocate space for this in the the program's heap. * fhandler.cc (fhandler_base::operator =): Move here from fhandler.h. Use cygwin heap to allocate filenames. (fhandler_base::set_name): Allocate/free names from cygwin heap. (fhandler_base::linearize): Delete. (fhandler_base::de_linearize): Delete. (fhandler_base::operator delete): Free from cygwin heap. (fhandler_base::~fhandler_base): Ditto. * fhandler.h: Accomodate elimination of *linearize and other changes above. * fhandler_console.cc (fhandler_console::fixup_after_exec): Rename from de_linearize. * heap.h: New file. * fhandler_tty.cc (fhandler_tty_slave::fhandler_tty_slave): Use cygwin heap for name. fhandler_tty::fixup_after_exec): Rename from de_linearize. * fork.cc (fork): Call cygheap_fixup_in_child. * heap.cc: Use declarations in heap.h. * malloc.cc: Sprinkle assertions throughout to catch attempts to free/realloc something from the cygwin heap. * path.cc: Throughout, eliminate use of per-thread cache for cwd. Use cwd_* functions rather than cwd_* variables to access cwd_win32 and cwd_posix. (cwd_win32): New function. (cwd_posix): New function. (cwd_hash): New function. (cwd_fixup_after_exec): New function. * path.h: Accomodate path.cc changes. * pinfo.cc (pinfo_init): Accept a pointer to an environment table. Pass this to environ_init. Eliminate old 'title' tests. * pinfo.h: Accomodate above change in argument. * spawn.cc (struct av): New method for building argv list. (av::unshift): New method. (spawn_guts): Allocate everything that the child process needs in the cygwin heap and pass a pointer to this to the child. Build argv list using new method. Eliminate delinearize stuff. * thread.h: Eliminate _cwd_win32 and _cwd_posix buffers. * winsup.h: Eliminate obsolete functions. Add envsize() declaration.
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res = 0;
}
else
{
if (GetLastError() == ERROR_ACCESS_DENIED)
{
/* On 9X ERROR_ACCESS_DENIED is returned if you try to remove
a non-empty directory. */
if (!iswinnt)
set_errno (ENOTEMPTY);
else
__seterrno ();
}
else
__seterrno ();
/* If directory still exists, restore R/O attribute. */
if (real_dir.file_attributes () & FILE_ATTRIBUTE_READONLY)
SetFileAttributes (real_dir.get_win32 (), real_dir.file_attributes ());
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}
done:
syscall_printf ("%d = rmdir (%s)", res, dir);
return res;
}