Sponsored Content
Full Discussion: Alias not working
Operating Systems Solaris Alias not working Post 302918844 by Don Cragun on Thursday 25th of September 2014 08:07:28 PM
Old 09-25-2014
Quote:
Originally Posted by jlliagre
I agree the race condition risk however, it isn't easy or even possible for regular users to replace the utilities already created in /tmp. What they might do is anticipate and create hostile alternatives before the gsrc.sh script is ever executed.
That depends on what system you're using. Some systems create a per user /tmp directory (although that is not allowed by the standards); others have a single /tmp directory shared by everyone on the system. Some system administrators set up /tmp such that anyone can remove any file in that directory and create a new file with that name anytime they want; others set the permissions on that directory so that only the owner of the file or someone running "with appropriate privileges" can remove a file. The umask setting at the time the file was created will determine who can read and write that file (if they don't have permission to just remove and replace it).

On many systems, if I create /tmp/ECHO as user dwc and set the mode to 0600 and you try to run wisecracker's script that ignores any error when using printf to set the contents of that file, then the later attempt to execute
Code:
ECHO=`< /tmp/ECHO`

will fail with a permission denied error trying to read the file I created.

Utilities belong in "safe" places like /bin and $HOME/bin; not in places like /tmp.
 

10 More Discussions You Might Find Interesting

1. UNIX for Advanced & Expert Users

host alias not working: host not found

Hello, I am working on HP-UX , and in the /etc/hosts file we have setup an alias: aa.bb.cc.dd devmach2.unix.org devmach2 devma2v The alias devma2v does not work. Error when pinging devma2v ping: unknown host devma2v For devmach2 the ping works fine , returning the correct IP... (4 Replies)
Discussion started by: FunnyCats
4 Replies

2. UNIX for Dummies Questions & Answers

alias not working in scripts

Hi All, PF below details, > cat run.sh #!/usr/bin/ksh alias ll="ls -l" > ./run.sh > ll ksh: ll: not found. Pls help on this? Thanks in Advance, Naga :cool: (2 Replies)
Discussion started by: Nagapandi
2 Replies

3. UNIX for Dummies Questions & Answers

alias command not working after re-login

i create some alias in .cshrc file then i run source .cshrc to refresh it, the alias command work fine but when i relogin again, the alias command is not working... i need to re-run the source .cshrc command so that the alias only workable. any idea on it? (7 Replies)
Discussion started by: lsy
7 Replies

4. Solaris

Alias not working

Hello, I am trying to set an alias in my .kshrc or .profile and when I do it is not setting. If I do it manually it works fine. Is there another file I should put this in? Here is the alias I am using. alias ll='ls -ltr' I am using solaris 9. When I type alias it does not show these... (5 Replies)
Discussion started by: dkranes
5 Replies

5. Solaris

Simple question: alias not working for root

OS = Solaris 8 Issue: alias not working for root, but working for regular users # grep root /etc/passwd root:x:0:1:Super-User:/:/sbin/sh # alias dir=ls # dir dir: not found # alias dir="ls -l" # dir dir: not found # alias dir='ls -l' # dir dir: not found # alias... (2 Replies)
Discussion started by: aixlover
2 Replies

6. UNIX for Dummies Questions & Answers

cp command not working with alias

Hi Friends, I have added some aliases in .bash_profile file under the root folder. Its works fine and very useful, but does not go well with cp command. alias deploy="cd /usr/local/tomcat/webapp" alias artifacts="cd /usr/local/artifacts" but when i try to cp from artifacts folder... (2 Replies)
Discussion started by: prashdeep
2 Replies

7. Red Hat

[SOLVED] How the alias is working?

Iam facing some strange issue with alias. I have an alias file in which i have created lot of aliases as given below. export BUILD_HOME=/apps/psr/build export DB_HOME=/apps/psr/database export LOGS_HOME=/apps/psr/logs export BUILD_TEST=/apps/psr/build_dev/build_test export... (0 Replies)
Discussion started by: Vikram_Tanwar12
0 Replies

8. Solaris

Alias is not working under Bourne Shell

Hi, Please assist me why HC alias is not working under this shell? root@singapore # grep HC /.profile alias HC='cd /var/tmp/HC/2015/`date +%B`' root@singapore # . /.profile Sourcing //.profile-EIS..... root@singapore # echo $HC root@singapore # HC HC: not found root@singapore # echo... (18 Replies)
Discussion started by: tprabhu1983
18 Replies

9. Shell Programming and Scripting

Alias not working

I have several shell scripts which contain the nawk command. Here is what i m doing assign the correct value to nawk as nawk is not found on a new systems. Here is what i did. more test.sh ] && alias nawk=/usr/bin/gawk ] && alias nawk=/usr/bin/nawk ] && alias nawk=/usr/bin/awk... (7 Replies)
Discussion started by: mohtashims
7 Replies

10. UNIX for Beginners Questions & Answers

Lost with this alias why it is not working

Hi, I have the following aliases: $: alias | grep "^du=" du='du -s * 2>/dev/null | awk '\''{ printf "%4.2f-KB ==> %s \n", $1/1024 , $2 }'\'' | sort -rn' $: alias | grep "^dutop10=" dutop10='du -s * 2>/dev/null | awk '\''{ printf "%4.2f-KB ==> %s \n", $1/1024 , $2 }'\'' | sort -rn | head... (2 Replies)
Discussion started by: newbie_01
2 Replies
i-ls(1) 						      General Commands Manual							   i-ls(1)

NAME
i-ls - display file stat and checksum information for files SYNOPSIS
i-ls [-s] filename i-ls [-s] dirname Specify a filename for i-ls to examine, or specify a directory with dirname to examine all the files in the directory. -s Do not show/calculate checksums for all regular files. DESCRIPTION
The integrit system detects intrusion by detecting when trusted files have been altered. integrit records information about files in a database. i-ls allows the user to see that information for live files. The output syntax is the same as that of integrit. EXAMPLES
i-ls /tmp/foo.txt shows file stat attributes for the file, "/tmp/foo.txt". i-ls /tmp shows file stat attributes for all files in the directory, "/tmp". i-ls -s /tmp shows file stat attributes for all files in the directory, "/tmp", also including also checksums for all regular files. AUTHOR
Ed L Cashin <ecashin@users.sourceforge.net> See the integrit web site for up to date releases and information at http://integrit.sourceforge.net/ SEE ALSO
Integrit File Verification System Manual (info), lstat(2) Version 4.1 Jul 27, 2001 i-ls(1)
All times are GMT -4. The time now is 05:12 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy