Mask that controls which file permissions are set for files and directories when they are created. It also refers to a function that sets the mask, and to the mask itself, which is formally known as the file mode creation mask.

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1answer
16 views

umask permissions that result in no change

I am having a really hard time understanding how umask works. How is something that is 666 masked with 001 still 666 ?
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2answers
94 views

umask XXX (permission bits) to give execute permission to files

Because files created by default having permission of 666 and umask (in permission bits form) subtract bit-wise from this permission, can we do something to give execute permission without using ...
3
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2answers
90 views

How to set `umask` for the entire gnome session?

Using Gnome 3.18. I share files between other family members, but the default umask on my distro (archlinux) is 0022. So every file/directory created is not writable for our common group. I tried to ...
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0answers
12 views

permissons on ftp'd files don't seem to match umask

I've read several postings indicating that ftp respects the user's umask. I don't see that that is the case. this is what happens on my server X when I FTP a file from SystemX, to SystemX. SystemX is ...
2
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2answers
83 views

SFTP clients uploading files with too restrictive rights

I have the following setup: Ubuntu 14.4 server offering SFTP service in a front-end area. External clients have the ability to upload files. A back-end process (on another server) tracks uploaded ...
1
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1answer
77 views

set umask before every non login non interactive shell command

I'm using PHP script and to connect to ssh server. It executes one command and exits. Connection is made to non interactive and non login shell. Because of that it does not load .bashrc or ...
2
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2answers
113 views

How to change permission of anonymous pipe?

I've the script which loads the SSH key from the variable (as part of script in CI environment) in order to not keep the private file in the public repository, however ssh-add complains about the ...
2
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0answers
61 views

What is the effect of ACLs/umask on the permissions of the executable file generated by gcc?

I have been wondering how gcc determines the resulting file permissions of the executable file being generated. To gain some insight, I considered a minimalistic program test.c #include ...
4
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3answers
141 views

Historically why is umask the way it is?

umask has always tripped me up. Logically I would prefer to have a 'setmask' instead that takes chmod-style arguments. Anyone know why it is the way it is?
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1answer
56 views

umask vs -m, --mode command options

Is there any technical merit/necessity to numerous *nix commands (mkdir, mkfifo, mknod) having a -m (--mode) option? I ask this because near as I can tell, umask (both the shell command and the ...
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0answers
50 views

umask issue with apache phusion passenger

We have a rails application where a unix account will write to directory belonging to another unix account. I have added both the accounts to a common group. The new file which is getting created does ...
1
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1answer
50 views

Umask not respected in OCFS2 filesystem

I encountered some strange behavior on a machine that uses a replicated block device (via DRBD) along with OCFS2 to allow concurrent mounts on multiple machines. The issue, in short, is that new files ...
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0answers
35 views

Can't determine where umask is being changed

On my RHEL system, my /etc/login.defs has the line UMASK 077. I have one user who has a .cshrc which changes his umask to 022. I also have a second user who does not have a .cshrc or .bashrc or any ...
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2answers
222 views

How umask works [duplicate]

I'm new to Linux. I have been practicing a few commands. My question is about when I'm creating different files using a different umask. For example: umask 222, as I understand it, is the same as 777 ...
2
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2answers
435 views

Confused on file and directory permissions for Samba shares

I've been searching for while to try to understand the following mask/mode fields for creating files/folders in Samba shares: create mask force create mode directory mask force directory mode But ...
0
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1answer
86 views

umask getting sets to 022 even though all necessary files are modified

umask is creating lots of problem to me . I tried following . I have commented umask set entry in /etc/profile and /etc/bashrc . There is not even single file in my home direcotry where i set umask ...
2
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1answer
776 views

Default umask for cron jobs

How to set default umask for cron jobs, please? (On RHEL 6.) Jobs are started under non-interactive (obviously) no-login (?) shell. Not only I prefer dash over bash. But consider also bash called as ...
1
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1answer
113 views

Set default permissions so only owner can read, execute and write for every new file and directory

I added this to my ~/.bashrc file: umask 077 So that every new file and directory has by default read, write and execute permissions. It does work with directories, but files only have write and ...
4
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3answers
217 views

mkdir permissions do not correspond to umask (change depending on location)

Whenever I create new directories in my home (or its subdirectories) they do not have write permission, even though umask is set correctly. Files I make DO have write permission. [mmanary@seqap33 ~]$ ...
3
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2answers
232 views

Setting correct permissions automatically for certain file type when file is copied from non-Linux file system

The main reason I want this is my heavy use of dircolors, especially for ls --color=auto. For example, whenever a .mp3 file is copied from NTFS, it will have permissions set by umask 022 which ought ...
2
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1answer
87 views

Where does the value that umask is applied to come from

I'm trying to understand umask properly. If I set umask to 0000 and then create a file I get the following permissions: -rw-rw-rw- I presume that this value (or set of permissions) is what the ...
2
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1answer
154 views

files saves to ntfs drive adhere to umask, ext4 does not

I have 2 storage drives, 1 is ntfs and the other is ext4. Both mounted in /media as Storage_1 and Storage_2 I've run chmod -R user:user /media/Storage_* I've tried putting umask=022 in ...
1
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1answer
41 views

UMASK privacy- how can I make user files private to the users

I have a debian virtual machine set up and thought of something in regards to UMASK. First I would like to ask if the function of UMASK is to set CHMOD values on any file created by a user. Secondly, ...
0
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1answer
335 views

mount command permissions: ntfs vs. ntfs-3g

I see numerous how-to examples for mounting an ntfs partition with either a mount command or an entry in fstab. In all cases, specifying ntfs as the filesystem is associated with also specifying ...
3
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1answer
1k views

How to make a cifs/smb mount ignore umask?

I have a cifs mount that is mounted from /etc/fstab. But I would quite like creation of files/dirs on that share to ignore my umask. Is that possible? It seems that cifs does not support the umask=000 ...
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3answers
940 views

Why can't my python script change umask?

This is my script #!/usr/bin/python import os print "hello world from python" os.system("echo 'hello world from bash'") os.system("umask 055") os.system("ls -alh > test") If I run this code ...
2
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1answer
180 views

How to set umask so that directories to be `r-x` and files to be `---`

I want to set the default permissions for newly created directories to have r-x for others and those of newly created files (non-directory files) to have ---. If I set the umask to 2, directory ...
2
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1answer
494 views

setting default umask and user:group on directory

I have a directory data and I need to set default umask and ownership for all directories/files (both existing and future files). I want all files in data to have ownership root:martin ans ...
0
votes
1answer
404 views

Does ~/.bashrc set environment for users whose shell is /sbin/nologin?

I have an SFTP server and have set user shells to nologin to restrict access to SFTP. I want to set a conditional umask of 0002 so that newly created files are group writable for all SFTP users. Can ...
2
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2answers
273 views

set umask (permissions) similarly as setgid on a directory

I know how to use setgid on directories, to enforce that whole directory structure has uniform user:group ownership. Is there a similar way to set the umask for a directory, so that the whole ...
2
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2answers
1k views

How to find where I have set “umask 077”?

When logged in as root, I have umask set to 077 which causes problems (such as /etc/resolv.conf being unreadable for non-root and thus DNS not working. I don't know where I have set the umask 077. It ...
3
votes
4answers
2k views

scp and umask setting

How do i make SCP respect umask ? Ive tried adding this Subsystem sftp internal-sftp -u 0002 in /etc/ssh/sshd_config and session optional pam_umask.so umask=0002 in ...
6
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1answer
5k views

How is umask calculated in Linux?

So I know umask can restrict privileged users, using this format umask ugo. I understand that the read = 4, write = 2, and exec = 1. However, when I type umask, it returns 4 digits which is 0022 or ...
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0answers
456 views

Umask for root and other system users

If I am not wrong, this is how umask is calculated. for dir, 777 - 022(root's umask value) = 755. for file, 666 - 022(root's umask value) = 644. Now, where this umask value is defined? Is it the ...
3
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2answers
5k views

Setting umask for su root

In my user account I set the umask to be 022 with my .bashrc, but I want root to use a umask of 077 no matter how I become root (e.g., logging in directly as root on a tty or using sudo or su). If I ...
8
votes
2answers
23k views

How to check umask for all users under Linux?

Under AIX I can check the umask for all users with: cut -d : -f 1 /etc/passwd | while read ONELINE; do lsuser -a umask "$ONELINE"; done But how can I check the umask setting for all users under ...
0
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1answer
62 views

Doesn't umask apply to files?

I have set the umask to 0. So: $umask 0000 I do echo 'test' > test.txt And test.txt is created. If I do: ls -l test.txt I see: $ls -l test.txt -rw-rw-rw- 1 jim None 5 Jun 30 22:50 ...
1
vote
1answer
409 views

Base permissions on a fat32 usb drive

On linux, the base permissions for directories is 777 and for files, it is 666. Thus, with umask=022, new files are 644 and new directories are 755. But when I mount a usb drive with fat32 ...
1
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1answer
367 views

umask base permissions on usb drive [duplicate]

On linux, the base permission for a file is 666 and for directories, it is 777. With a umask=022, new files and directories have permissions 644 and 755 respectively. When I mount a usb drive with ...
1
vote
1answer
1k views

Properly Setting Red Hat Daemon Umask

I've been trying to figure out the proper location to set daemon umasks in RedHat 5. All my searches lead to setting it in /etc/init.d/functions or /etc/sysconfig/init. What are the pros/cons of ...
6
votes
1answer
778 views

Default umask 077 not applied at session start

I cannot get the default umask for a session to be 0077. I have edited /etc/login.defs and set the value to 077 there: UMASK 077 Also I've made sure the following entry exists in ...
1
vote
1answer
638 views

Apache created files and its permissions for CentOS 6.x

In short, I have an authenticated HTTP-POST that: posts a jpg image (created as 666 apache:www) into /directory1 (777 ftpuser:www) creates /directory2 (created as 666 apache:www) in a 777 ...
0
votes
3answers
3k views

Why is umask setting a different permission for a directory and file I have created?

Consider: [user@server1 ~]$ umask 0770 [user@server1 ~]$ mkdir TEST2; touch TEST2.txt; [user@server1 ~]$ ls -l d------rwx 2 user group_name 4096 Mar 5 05:16 TEST2 -------rw- 1 user group_name 0 ...
5
votes
2answers
1k views

How can I change the umask for one command only?

How can I interactively execute a command in Linux (zsh, if it matters) with a different umask from the default, for one command only? Perhaps a combination of commands combined in a single line? The ...
2
votes
1answer
274 views

How are default permissions determined (on OS X)?

My (limited) understanding of basic Unix is that any files that are created will be created based on the permissions of the creating user. In particular, the group assigned will be the creating user's ...
2
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2answers
95 views

Read umask for a user

Plenty of examples on how to set umask for a user... but how do you read (or uncover) the default umask for a given user (say the logged in user)
3
votes
1answer
238 views

How to display the permissions of a new file in the status line of the Vim editor?

With the following piece of code I get the permissions for an existing file: augroup Get_file_perm autocmd! autocmd BufWinEnter,FileChangedShell * let w:file_perm=getfperm(expand('%:p')) augroup ...
0
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4answers
2k views

umask is not working for directories

I have an odd problem with umask. My current setting is: $ umask 0022 $ umask -S u=rwx,g=rx,o=rx This only works for files though and not directories: $ touch abc $ ll abc 0 -rw-rw-rw- 1 user1 ...
2
votes
2answers
955 views

Pre-defined umask under a given path [duplicate]

Possible Duplicate: How to set default file permissions for all folders/files in a directory? Say I have default umask, umask1. I would like all files/folders that I create/modify under a ...
2
votes
1answer
2k views

What is the difference between cmask and umask?

What is the difference between the umask setting that can be found in /etc/profile and the cmask setting that can be found in /etc/default/init? What is the difference between the two? When will one ...