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- open() no longer examines a file after opening it in order to figure

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out whether read/write accesses are permitted. This decision is now
  for the file system to make.


git-svn-id: file:///Users/olsen/Code/migration-svn-zu-git/logical-line-staging/clib2/trunk@14799 87f5fb63-7c3d-0410-a384-fd976d0f7a62
This commit is contained in:
Olaf Barthel
2005-01-09 16:07:27 +00:00
parent 5191ee5660
commit 619b64e6f4
2 changed files with 7 additions and 63 deletions
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4
library/changes
View File

@ -40,6 +40,10 @@
- Switched over the last use of DeviceProc() to GetDeviceProc(), etc.
- open() no longer examines a file after opening it in order to figure
out whether read/write accesses are permitted. This decision is now
for the file system to make.
c.lib 1.185 (2.1.2005)

66
library/fcntl_open.c
View File

@ -1,5 +1,5 @@
/*
* $Id: fcntl_open.c,v 1.6 2005-01-09 15:58:02 obarthel Exp $
* $Id: fcntl_open.c,v 1.7 2005-01-09 16:07:27 obarthel Exp $
*
* :ts=4
*
@ -53,39 +53,9 @@
/****************************************************************************/
/* This is used in place of ExamineFH() in order to work around a bug in
/* This is used in place of ChangeMode() in order to work around a bug in
dos.library V40 and below: a "NIL:" file handle will crash the
ExamineFH() function. */
static LONG
safe_examine_file_handle(BPTR file_handle,struct FileInfoBlock *fib)
{
LONG result = DOSFALSE;
assert( fib != NULL );
#ifndef __amigaos4__
{
struct FileHandle * fh = (struct FileHandle *)BADDR(file_handle);
if(fh == NULL || fh->fh_Type == NULL)
{
SetIoErr(ERROR_OBJECT_WRONG_TYPE);
goto out;
}
}
#endif /* __amigaos4__ */
PROFILE_OFF();
result = ExamineFH(file_handle,fib);
PROFILE_ON();
out:
return(result);
}
/* Same thing as above, but for ChangeMode(), which suffers from
the same problem. */
caller of the ChangeMode() function. */
static LONG
safe_change_mode(LONG type,BPTR file_handle,LONG mode)
{
@ -356,36 +326,6 @@ open(const char *path_name, int open_flag, ... /* mode_t mode */ )
goto out;
}
if(safe_examine_file_handle(handle,fib) != DOSFALSE)
{
BOOL operation_permitted = TRUE;
/* Check if the file is readable. */
if(FLAG_IS_SET(fib->fib_Protection,FIBF_READ))
{
if(access_mode == O_RDONLY ||
access_mode == O_RDWR)
{
operation_permitted = FALSE;
}
}
/* Check if the file can be written to. */
if(FLAG_IS_SET(fib->fib_Protection,FIBF_WRITE))
{
if(access_mode == O_WRONLY)
operation_permitted = FALSE;
}
if(NOT operation_permitted)
{
SHOWMSG("this object must not be opened");
errno = EACCES;
goto out;
}
}
fd = __fd[fd_slot_number];
__initialize_fd(fd,(HOOKFUNC)__fd_hook_entry,handle,0);