12-31-2008
same file being opened by two users at a time
I want to avoid a situation where because two users simultaneously
open a file and modify and save, leaving the original file in mess.
Is there a way in UNIX to warn a user if that particular file is already being
used by another user.
Thanks in advance
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LEARN ABOUT ULTRIX
edquota
edquota(8) System Manager's Manual edquota(8)
Name
edquota - edit user quotas
Syntax
edquota [ -p proto-user ] users...
Description
The command is a quota editor. You can specify one or more users on the command line. For each user, creates a temporary file with an
ASCII representation of the current disc quotas for that user and an editor is then invoked on the file. You can then modify the quotas,
add new quotas, and so forth. Upon leaving the editor, reads the temporary file and modifies the binary quota files to reflect the changes
made.
If a valid quota file does not exist, refers the user to The user then has the option of either supplying the command which automatically
creates the necessary quota file, or creating an empty quota file by various other means.
If the option is specified, duplicates for each user, the quotas of the prototypical user specified. This is the usual mechanism used to
initialize quotas for groups of users.
The editor invoked is unless the environment variable EDITOR specifies otherwise.
Only the superuser can edit quotas.
Diagnostics
Various messages about inaccessible files. Other messages are self-explanatory.
Files
quotas At the root of each file system with quotas
Used to find file system names and locations
See Also
quota(1), quota(2), quotacheck(8), quotaon(8), repquota(8)
``Disk Quotas in a UNIX Environment,'' ULTRIX Supplementary Documents, Volume 3: System Manager
edquota(8)