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Full Discussion: UNDELETE a file
Top Forums UNIX for Advanced & Expert Users UNDELETE a file Post 302233740 by matrixmadhan on Monday 8th of September 2008 10:17:46 AM
Old 09-08-2008
Quote:
Originally Posted by aluiken
If the process is still running and did not yet close the file descriptor you can recover it directly via the file descriptor in /proc (on linux)
How to do this ? ( out of curiosity )
Did you mean the following steps ?

1) dup the file descriptor ( that is known )
2) use the new file descriptor to iterate through the contents of the file and store it again

Could you please shed more light on this ?
 

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door_revoke(3C) 					   Standard C Library Functions 					   door_revoke(3C)

NAME
door_revoke - revoke access to a door descriptor SYNOPSIS
cc -mt [ flag... ] file... [ library... ] #include <door.h> int door_revoke(int d); DESCRIPTION
The door_revoke() function revokes access to a door descriptor. Door descriptors are created with door_create(3C). The door_revoke() func- tion performs an implicit call to close(2), marking the door descriptor d as invalid. A door descriptor can be revoked only by the process that created it. Door invocations that are in progress during a door_revoke() invoca- tion are allowed to complete normally. RETURN VALUES
Upon successful completion, door_revoke() returns 0. Otherwise, door_revoke() returns -1 and sets errno to indicate the error. ERRORS
The door_revoke() function will fail if: EBADF An invalid door descriptor was passed. EPERM The door descriptor was not created by this process (with door_create(3C)). ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Architecture |all | +-----------------------------+-----------------------------+ |Availability |SUNWcsu | +-----------------------------+-----------------------------+ |Interface Stability |Stable | +-----------------------------+-----------------------------+ |MT-Level |Safe | +-----------------------------+-----------------------------+ SEE ALSO
close(2), door_create(3C), attributes(5) SunOS 5.11 22 Mar 2005 door_revoke(3C)
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