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Full Discussion: File locking
Top Forums UNIX for Advanced & Expert Users File locking Post 302299083 by abhinx on Thursday 19th of March 2009 06:59:44 AM
Old 03-19-2009
File locking

i am working on a device runnin on linux....i have configured the samba server in the device such that my windows PC can access a shared folder in the device. Also in the device i am runnin some programs which access the files in this shared folder. What i want to know is whether there is any way i can lock the files in the shared folder when these programs access them, such that my windows PC cannot delete the files or modify them while it is bein used. I read somewher tht the only way is to change the file permissions, but the problem is tht the folder is shared with full rights -777 , and it has to be so for what i am working on...so even if i change the file permission of the particular file it is of no use...
Is there any way to get around this problem..the programs i am runnin are written in C..it would be helpful if some solution can be given which can be implemented in C itself because i can just fuse it into programs then....
 

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RMF(1)								     [nmh-1.5]								    RMF(1)

NAME
rmf - remove an nmh folder SYNOPSIS
rmf [+folder] [-interactive | -nointeractive] [-version] [-help] DESCRIPTION
Rmf removes all of the messages (files) within the specified (or default) folder, and then removes the folder (directory) itself. If there are any files within the folder which are not a part of nmh, they will not be removed, and an error will be produced. If the folder is given explicitly or the -nointeractive option is given, then the folder will be removed without confirmation. Otherwise, the user will be asked for confirmation. If rmf can't find the current folder, for some reason, the folder to be removed defaults to `+inbox' (unless overridden by user's profile entry "Inbox") with confirmation. If the folder being removed is a subfolder, the parent folder will become the new current folder, and rmf will produce a message telling the user this has happened. This provides an easy mechanism for selecting a set of messages, operating on the list, then removing the list and returning to the current folder from which the list was extracted. If rmf s used on a read-only folder, it will delete all the (private) sequences (i.e., "atr-seq-folder" entries) for this folder from your context without affecting the folder itself. Rmf irreversibly deletes messages that don't have other links, so use it with caution. FILES
$HOME/.mh_profile The user profile PROFILE COMPONENTS
Path: To determine the user's nmh directory Current-Folder: To find the default current folder Inbox: To find the default inbox SEE ALSO
rmm(1) DEFAULTS
`+folder' defaults to the current folder, usually with confirmation `-interactive' if +folder' not given, `-nointeractive' otherwise CONTEXT
Rmf will set the current folder to the parent folder if a subfolder is removed; or if the current folder is removed, it will make "inbox" current. Otherwise, it doesn't change the current folder or message. BUGS
Although intuitively one would suspect that rmf works recursively, it does not. Hence if you have a sub-folder within a folder, in order to rmf the parent, you must first rmf each of the children. MH.6.8 11 June 2012 RMF(1)
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