08-10-2004
I was talking of the "file permission kludge" (sorry, translation are sometimes difficults). I never used it so far but I understand from the man page that some applications can use this file permission (if exists) to lock file while using it. Is it correct?
Anyway thanks for the code, I'm almost certain I will use it one day.
Thanks.
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
I have a set of scripts to do software releases to remote machines which uses ftp. I'm having a problem getting 'lost connection' messages.
What I wanted to ask is, does ftp employ some sort of file locking if two ftp processes are trying to copy the same file at the same time? & if so could... (2 Replies)
Discussion started by: Kevin Pryke
2 Replies
2. UNIX for Dummies Questions & Answers
Hi,
Simple question but I just need to confirm the answer:
If two or more processes attempt to move the same file at exactly the same time, will unix internal file locking allow only one of the processes to access the file?
Many thanks
Helen :) (2 Replies)
Discussion started by: Bab00shka
2 Replies
3. UNIX for Advanced & Expert Users
Hi,
Does anyone know what happens when two processes are simultaneously trying to write to a single file in UNIX (AIX)?
Cheers (1 Reply)
Discussion started by: penfold
1 Replies
4. UNIX for Dummies Questions & Answers
We want to lock a file, during a program(pgm1) execution(until the execution of the program is completed), so that other program(pgm2) can't read/edit that file, until execution of earlier program(pgm1) is completed. How can this be achieved thru shell scripting...
we tried chmod +l option, but... (1 Reply)
Discussion started by: thanuman
1 Replies
5. UNIX for Dummies Questions & Answers
Hi all!
I want to know about Mapping Filesystems to
Multiprocessor Systems.( lock ...) and Traditional UNIX Locking Primitives. Can you help me? (1 Reply)
Discussion started by: nguoidoius
1 Replies
6. UNIX for Dummies Questions & Answers
how do i implement file locking in unix?
example if i want to update a file, i would like to use file locking. how do i implement it?
i am using shell script
thanks (3 Replies)
Discussion started by: yang
3 Replies
7. UNIX for Dummies Questions & Answers
how to ensure all files are being locked while updateing some files?
example when i want to update the password and shadow file in unix. how do i implement file locking??
please advice
thanks (2 Replies)
Discussion started by: yang
2 Replies
8. UNIX for Advanced & Expert Users
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... (1 Reply)
Discussion started by: abhinx
1 Replies
9. Shell Programming and Scripting
Hi all,
Can anyone help ...on how to ensure that a file is locked .
thanks & regards,
Soodoo
----------------------------------------
Problem description: -
We usually use the mv command in scripts to make sure that a file is complete and not being written to by another process.
... (1 Reply)
Discussion started by: soodoo
1 Replies
10. OS X (Apple)
Here is my scenario
The applications that I want to run are on Linux Server and the client machines that are having problem in locking the .Xauthority files are Macs which share the same domain as that of client solaris machine. i.e. The home directory of particular user on Solaris & the home... (4 Replies)
Discussion started by: mhatrey
4 Replies
LEARN ABOUT REDHAT
acl_get_perm
ACL_GET_PERM(3) BSD Library Functions Manual ACL_GET_PERM(3)
NAME
acl_get_perm -- test for a permission in an ACL permission set
LIBRARY
Linux Access Control Lists library (libacl, -lacl).
SYNOPSIS
#include <sys/types.h>
#include <acl/libacl.h>
int
acl_get_perm(acl_permset_t permset_d, acl_perm_t perm);
DESCRIPTION
The acl_get_perm() function tests if the permission specified by the argument perm is contained in the ACL permission set pointed to by the
argument permset_d.
Any existing descriptors that refer to permset_d continue to refer to that permission set.
RETURN VALUE
If successful, the acl_get_perm() function returns 1 if the permission specified by perm is contained in the ACL permission set permset_d,
and 0 if the permission is not contained in the permission set. Otherwise, the value -1 is returned and the global variable errno is set to
indicate the error.
ERRORS
If any of the following conditions occur, the acl_get_perm() function returns -1 and sets errno to the corresponding value:
[EINVAL] The argument permset_d is not a valid descriptor for a permission set within an ACL entry.
The argument perm is not a valid acl_perm_t value.
STANDARDS
This is a non-portable, Linux specific extension to the ACL manipulation functions defined in IEEE Std 1003.1e draft 17 ("POSIX.1e", aban-
doned).
SEE ALSO
acl_add_perm(3), acl_clear_perms(3), acl_delete_perm(3), acl_get_permset(3), acl_set_permset(3), acl(5)
AUTHOR
Written by Andreas Gruenbacher <a.gruenbacher@computer.org>.
Linux ACL March 23, 2002 Linux ACL