access.c File Reference

#include "ext2fs.h"

Include dependency graph for access.c:

Go to the source code of this file.

Functions
int	Ext2CheckInodeAccess (PEXT2_VCB Vcb, struct inode *in, int attempt)
int	Ext2CheckFileAccess (PEXT2_VCB Vcb, PEXT2_MCB Mcb, int attempt)

Variables
PEXT2_GLOBAL	Ext2Global

Function Documentation

Ext2CheckFileAccess()

int Ext2CheckFileAccess	(	PEXT2_VCB	Vcb,
		PEXT2_MCB	Mcb,
		int	attempt
	)

Definition at line 51 of file access.c.

{
    return Ext2CheckInodeAccess(Vcb, &Mcb->Inode, attempt);
}

Referenced by Ext2CreateFile(), Ext2LookupFile(), Ext2SetFileInformation(), and Ext2WriteFile().

Ext2CheckInodeAccess()

int Ext2CheckInodeAccess	(	PEXT2_VCB	Vcb,
		struct inode *	in,
		int	attempt
	)

Definition at line 20 of file access.c.

{
    int granted = 0;
 
    uid_t uid = Vcb->uid;
    gid_t gid = Vcb->gid;
 
    if (IsFlagOn(Vcb->Flags, VCB_USER_EIDS)) {
        uid = Vcb->euid;
        gid = Vcb->egid;
    }
 
    if (!uid || uid == in->i_uid) {
        /* grant all access for inode owner or root */
        granted = Ext2FileCanRead | Ext2FileCanWrite | Ext2FileCanExecute;
    } else if (gid == in->i_gid) {
        if (Ext2IsGroupReadOnly(in->i_mode))
            granted = Ext2FileCanRead | Ext2FileCanExecute;
        else if (Ext2IsGroupWritable(in->i_mode))
            granted = Ext2FileCanRead | Ext2FileCanWrite | Ext2FileCanExecute;
    } else {
        if (Ext2IsOtherReadOnly(in->i_mode))
            granted = Ext2FileCanRead | Ext2FileCanExecute;
        else if (Ext2IsOtherWritable(in->i_mode))
            granted = Ext2FileCanRead | Ext2FileCanWrite | Ext2FileCanExecute;
 
    }
 
    return IsFlagOn(granted, attempt);
}

Referenced by Ext2CheckFileAccess(), and Ext2ProcessEntry().

Variable Documentation

Ext2Global

PEXT2_GLOBAL Ext2Global

extern

Definition at line 16 of file init.c.