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Move the open/creat access checks to more efficient places.

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git-svn-id: https://svn.code.sf.net/p/freedos/svn/kernel/trunk@1409 6ac86273-5f31-0410-b378-82cca8765d1b
This commit is contained in:
Bart Oldeman 2009-05-29 00:03:27 +00:00
parent 7b89e44274
commit 1cc33a1a5e
2 changed files with 21 additions and 32 deletions
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39
kernel/dosfns.c
View File

@ -549,6 +549,17 @@ long DosOpenSft(char FAR * fname, unsigned flags, unsigned attrib)
return sft_idx;
}
/* First test the flags to see if the user has passed a valid */
/* file mode... */
if ((flags & O_ACCMODE) > 2)
return DE_INVLDACC;
/* NEVER EVER allow directories to be created */
/* ... though FCBs are weird :) */
if (!(flags & O_FCB) &&
(attrib & ~(D_RDONLY | D_HIDDEN | D_SYSTEM | D_ARCHIVE | D_VOLID)))
return DE_ACCESS;
/* /// Added for SHARE. - Ron Cemer */
if (IsShareInstalled(TRUE))
{
@ -557,34 +568,13 @@ long DosOpenSft(char FAR * fname, unsigned flags, unsigned attrib)
flags & 0x03, (flags >> 4) & 0x07)) < 0)
return sftp->sft_shroff;
}
/* /// End of additions for SHARE. - Ron Cemer */
/* NEVER EVER allow directories to be created */
/* ... though FCBs are weird :) */
if (!(flags & O_FCB) &&
(attrib & ~(D_RDONLY | D_HIDDEN | D_SYSTEM | D_ARCHIVE | D_VOLID)))
return DE_ACCESS;
sftp->sft_count++;
sftp->sft_flags = PriPathName[0] - 'A';
result = dos_open(PriPathName, flags, attrib, sft_idx);
if (result >= 0)
{
if (result == S_OPENED)
{
/* Check permissions. -- JPP
(do not allow to open volume labels/directories) */
if (sftp->sft_attrib & (D_DIR | D_VOLID))
{
dos_close(sft_idx);
sftp->sft_count--;
return DE_ACCESS;
}
}
return sft_idx | ((long)result << 16);
}
else
if (result < 0)
{
/* /// Added for SHARE *** CURLY BRACES ADDED ALSO!!! ***. - Ron Cemer */
if (IsShareInstalled(TRUE))
@ -595,7 +585,8 @@ long DosOpenSft(char FAR * fname, unsigned flags, unsigned attrib)
/* /// End of additions for SHARE. - Ron Cemer */
sftp->sft_count--;
return result;
}
}
return sft_idx | ((long)result << 16);
}
long DosOpen(char FAR * fname, unsigned mode, unsigned attrib)

14
kernel/fatfs.c
View File

@ -136,11 +136,6 @@ int dos_open(char *path, unsigned flags, unsigned attrib, int fd)
char fcbname[FNAME_SIZE + FEXT_SIZE];
int status = S_OPENED;
/* First test the flags to see if the user has passed a valid */
/* file mode... */
if ((flags & O_ACCMODE) > 2)
return DE_INVLDACC;
/* next split the passed dir into comopnents (i.e. - path to */
/* new directory and name of new directory. */
if ((fnp = split_path(path, fcbname, sft_to_fnode(fd))) == NULL)
@ -174,9 +169,12 @@ int dos_open(char *path, unsigned flags, unsigned attrib, int fd)
if ((flags & O_FCB) && (fnp->f_dir.dir_attrib & D_RDONLY))
flags = (flags & ~3) | O_RDONLY;
/* Check permissions. -- JPP */
if ((fnp->f_dir.dir_attrib & D_RDONLY) &&
((flags & O_ACCMODE) != O_RDONLY))
/* Check permissions. -- JPP
(do not allow to open volume labels/directories,
and do not allow writing to r/o files) */
if ((fnp->f_dir.dir_attrib & (D_DIR | D_VOLID)) ||
((fnp->f_dir.dir_attrib & D_RDONLY) &&
((flags & O_ACCMODE) != O_RDONLY)))
{
dir_close(fnp);
return DE_ACCESS;