Linux and UNIX Man Pages

Linux & Unix Commands - Search Man Pages

sticky(8) [osx man page]

STICKY(8)						    BSD System Manager's Manual 						 STICKY(8)

NAME
sticky -- sticky text and append-only directories DESCRIPTION
A special file mode, called the sticky bit (mode S_ISVTX), is used to indicate special treatment for shareable executable files and directo- ries. See chmod(2) or the file /usr/include/sys/stat.h for an explanation of file modes. STICKY TEXT EXECUTABLE FILES
The sticky bit has no effect on executable files. All optimization on whether text images remain resident in memory is handled by the ker- nel's virtual memory system. STICKY DIRECTORIES
A directory whose `sticky bit' is set becomes an append-only directory, or, more accurately, a directory in which the deletion of files is restricted. A file in a sticky directory may only be removed or renamed by a user if the user has write permission for the directory and the user is the owner of the file, the owner of the directory, or the super-user. This feature is usefully applied to directories such as /tmp which must be publicly writable but should deny users the license to arbitrarily delete or rename each others' files. Any user may create a sticky directory. See chmod(1) for details about modifying file modes. BUGS
Neither open(2) nor mkdir(2) will create a file with the sticky bit set. HISTORY
A sticky command appeared in Version 32V AT&T UNIX. 4th Berkeley Distribution June 5, 1993 4th Berkeley Distribution

Check Out this Related Man Page

sticky(8)						      System Manager's Manual							 sticky(8)

Name
       sticky - executable files with persistent text

Description
       The sticky bit (file mode bit 01000), is used to indicate special treatment for certain executable files and directories.

       While the sticky bit, mode 01000 is set on a sharable executable file, the text of that file will not be removed from the system swap area.
       Thus the file does not have to be fetched from the file system upon each execution.  As long as a copy remains in the swap area, the origi-
       nal  text  cannot  be  overwritten  in  the file system, nor can the file be deleted.  Directory entries can be removed so long as one link
       remains.

       Sharable files are made by the and options of

       To replace a sticky file that has been used, clear the sticky bit with and execute the old program to flush the swapped copy.  This can	be
       done  safely  even  if others are using it.  Overwrite the sticky file.	If the file is being executed by any process, writing will be pre-
       vented.	It suffices to simply remove the file and then rewrite it, being careful to reset the owner and mode with and Set the  sticky  bit
       again.

       A  directory  whose  sticky bit is set becomes an append-only directory, or, more accurately, a directory in which the deletion of files is
       restricted.  A file in a sticky directory may only be removed or renamed by a user if the user has write permission for the  directory  and
       the  user  is the owner of the file, the owner of the directory, or the superuser.  This feature is usefully applied to directories such as
       which must be publicly writeable but should deny users the license to arbitrarily delete or rename each others' files.

Restrictions
       Only the superuser can set the sticky bit.

See Also
       chmod(2)

								       RISC								 sticky(8)
Man Page

15 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Sticky bit

I have a questions, whose answer may be very obvious: Of what use is the sticky-bit permission on a Unix system? I have looked at the chmod(1) man page on our HP-UX playground system, and haven't been given much explanation: Add or delete the save-text-image-on-file- execution (sticky... (3 Replies)
Discussion started by: LivinFree
3 Replies

2. UNIX for Dummies Questions & Answers

resrtrict user to his home directory

Hello How do i restrict a user only to his own directory so that he wont be able to cd to other directories. say for excample there is user called xiamin then xiamin should be restricted to /usr/xiamin only. i am on redhat linux regards Hrishy (4 Replies)
Discussion started by: xiamin
4 Replies

3. UNIX for Dummies Questions & Answers

chmod rights issue?

I want to grant the 'write' right to one user so they can delete log files in a given directory. These are http log files, so a new one is created each day. The file owner is 'nobody'. If I use the command 'chmod a=rwx *' will this work for the new files created each day. I've tried the... (7 Replies)
Discussion started by: Westy564
7 Replies

4. UNIX for Dummies Questions & Answers

simple script

guys, I have a need for a simple script that scans all of our users home directories (/home/*) and looks to see if the executable bit is on. If it finds that a user has a file with an executable bit on, it will send an email to managment. (no users are supposed to have any programs of their own... (4 Replies)
Discussion started by: hedrict
4 Replies

5. UNIX for Dummies Questions & Answers

Sticky Bit

Hi, could anyone please send me a link to learn/ know more about sticky bits? I am still not clear on the application of using a sticky bits. Thanks for your help. Regards, UP (3 Replies)
Discussion started by: teenu18
3 Replies

6. UNIX for Dummies Questions & Answers

Sticky Bit????

HI What is sticky bit? how can be see if the sticky bit for file is set? WHat is meaning of sticky bit set on Directory? What is the syntax to set the sticky bit? With example Thanks (10 Replies)
Discussion started by: skyineyes
10 Replies

7. Solaris

Does Sticky Bit works in solaris as per definition

Hi all, I have trouble working with Sticky bit in solaris, I am able to delete files and directory from the directory who has sticky bit set , i have verified that i am neither owner of the file pr directories.. I have check in Solaris 7, 8 ,9 ,10, versions, that does not seem to work..... (8 Replies)
Discussion started by: kshama
8 Replies

8. Shell Programming and Scripting

want file to regenerate after deletion

I looked into the sticky bit, but I think, if possible, that I would prefer to have the file recreate itself after deletion. The file is several directories deep, and from time to time the top level directory will be trashed. I need the file to recreate after this. Is it possible to perhaps... (13 Replies)
Discussion started by: glev2005
13 Replies

9. Homework & Coursework Questions

How to verify all user home directories are writable only by their owner

1. The problem statement, all variables and given/known data: Need to verify that all user home directories are writable only by their owner on Solaris. The script posted below is workable but it is taking a long time to display the results, and I don't seem to be able to fix it or find any... (6 Replies)
Discussion started by: NuuBe
6 Replies

10. UNIX for Dummies Questions & Answers

ls command

Hello again, is there any way i can use ls to display ONLY the executable files of a directory? thx again :) (5 Replies)
Discussion started by: demoloution
5 Replies

11. Shell Programming and Scripting

Script for Comparing directories and file from a text file

Hello all, I need to write a script which has following requirement: Need to read the filenames from text file and then search for the above read files in the required directory and if match found backup them in a backup folder. And also need to compare and verify whether the files in the... (7 Replies)
Discussion started by: saurau
7 Replies

12. Solaris

Solaris sticky bit

i got this archive file on sticky bit mode. somehow i could not remove the sticky bit. i could not even copy or view the view using file user account or root account. -rw-r--r-T 1 mark support 875166720 Mar 23 2005 file_mig.dat anybody encounter this type of problem? i have done running... (11 Replies)
Discussion started by: uwagon
11 Replies

13. AIX

How to set owner and permission for files/directory in directory in this case?

Hi. My example: I have a filesystem /log. Everyday, log files are copied to /log. I'd like to set owner and permission for files and directories in /log like that chown -R log_adm /log/* chmod -R 544 /log/*It's OK, but just at that time. When a new log file or new directory is created in /log,... (8 Replies)
Discussion started by: bobochacha29
8 Replies

14. Shell Programming and Scripting

Want to delete the junk files from a directory which are not listed in a TEXT file

Hello Everyone, I want to delete the image files from a directory, which are not listed in a TEXT file. The directory contains large number of image files (in millions) required / not required. I want to delete the image files which are "not required". I have generated a Text file having... (3 Replies)
Discussion started by: Praveen Pandit
3 Replies

15. UNIX for Beginners Questions & Answers

How to give permissions to read write but not delete the file?

i want to give users the ability to create write and read files in other user directory , but not to have option to delete the file after created ( sticky bit not going to work here ... ) for example : i have user : manager with directory repository i have user : worker1 that need to write... (4 Replies)
Discussion started by: umen
4 Replies

Featured Tech Videos