10 More Discussions You Might Find Interesting
1. UNIX for Beginners Questions & Answers
Just learning about the privilege escalation method provided by setuid. Correct me if I am wrong but what it does is change the uid of the current process to whatever uid I set. Right ?
So what stops me from writing my own C program and calling setuid(0) within it and gaining root privileges ?
... (2 Replies)
Discussion started by: sreyan32
2 Replies
2. UNIX for Dummies Questions & Answers
I had a question in my test which asked where suppose user B has a program with 's' bit set. Can user A run this program and gain root privileges in any way?
I suppose not as the suid program run with privileges of owner and this program will run with B's privileges and not root. (1 Reply)
Discussion started by: syncmaster
1 Replies
3. Shell Programming and Scripting
I need to list users in /etc/passwd with root's GID or UID or /root as home directory
If we have these entries in /etc/passwd
root:x:0:0:root:/root:/bin/bash
rootgooduser1:x:100:100::/home/gooduser1:/bin/bash
baduser1:x:0:300::/home/baduser1:/bin/bash... (6 Replies)
Discussion started by: anil510
6 Replies
4. AIX
Hi all
I have a strange problem on one my my AIX machines. We have created a user called testroot with the same UID as root (uid=0) by changing the uid of that user in the /etc/passwd file. I know that this is a security breach but this is a test system.
Now the strange thing that happens is that... (3 Replies)
Discussion started by: abohmeed
3 Replies
5. Solaris
Hi Unix Gurus .
I have requirement where in which - I would like create duplicate root equivalent account with all the privileges equal to root. Is it possible to create this duplicate account with different UID. ?
this id i would like give it to my teams - who does multiple activities using... (2 Replies)
Discussion started by: johnavery50
2 Replies
6. Solaris
Hi all,
I have a question to see if I understand the euid and uid attributes correctly for rbac (/etc/security/exec_attr):
All:
*
Audit Control:
/etc/init.d/audit euid=0, egid=3
/etc/security/bsmconv uid=0
/etc/security/bsmunconv uid=0
/usr/sbin/audit euid=0
/usr/sbin/auditconfig... (6 Replies)
Discussion started by: deadeyes
6 Replies
7. AIX
Guy's
I'm trying to add some lines in sudo by useing this command visudo
# User privilege specification
root ALL=(ALL) ALL
# Uncomment to allow people in group wheel to run all commands
# %wheel ALL=(ALL) ALL
# Same thing without a password
# %wheel ALL=(ALL) NOPASSWD: ALL
#... (5 Replies)
Discussion started by: ITHelper
5 Replies
8. Solaris
We have a Solaris box. I noticed that whenever any non-root user logins into the box and issues the command id the output is (for example) uid=42568(sam) gid=1245(sam) euid=0(root) egid=2(bin). I have not given any privileges to anyone explicitly. When I issued ls -l in the /usr/bin directory I... (1 Reply)
Discussion started by: chrisanto_2000
1 Replies
9. UNIX for Dummies Questions & Answers
Hi,
Its a shell script. rws by root, r_s by group named "other" and r_x by all others.
How can i set the uid from inside a setuid program. please let me know.
Also I dont have a c compiler on the system.
Thanks
Reply With Quote (0 Replies)
Discussion started by: 0ktalmagik
0 Replies
10. UNIX for Dummies Questions & Answers
I am trying to run chown and chmod from a script owned by root. The permissions are set to 4755 so that users can execute the script as root. However, when I run the script as a user other than root, I get "Operation not permitted" for both chown and chmod. Any ideas as to why this is? (6 Replies)
Discussion started by: johnmsucpe
6 Replies
ppmtosixel(1) General Commands Manual ppmtosixel(1)
NAME
ppmtosixel - convert a portable pixmap into DEC sixel format
SYNOPSIS
ppmtosixel [-raw] [-margin] [ppmfile]
DESCRIPTION
Reads a portable pixmap as input. Produces sixel commands (SIX) as output. The output is formatted for color printing, e.g. for a DEC
LJ250 color inkjet printer.
If RGB values from the PPM file do not have maxval=100, the RGB values are rescaled. A printer control header and a color assignment table
begin the SIX file. Image data is written in a compressed format by default. A printer control footer ends the image file.
OPTIONS
-raw If specified, each pixel will be explicitly described in the image file. If -raw is not specified, output will default to com-
pressed format in which identical adjacent pixels are replaced by "repeat pixel" commands. A raw file is often an order of magni-
tude larger than a compressed file and prints much slower.
-margin
If -margin is not specified, the image will be start at the left margin (of the window, paper, or whatever). If -margin is speci-
fied, a 1.5 inch left margin will offset the image.
PRINTING
Generally, sixel files must reach the printer unfiltered. Use the lpr -x option or cat filename > /dev/tty0?.
BUGS
Upon rescaling, truncation of the least significant bits of RGB values may result in poor color conversion. If the original PPM maxval was
greater than 100, rescaling also reduces the image depth. While the actual RGB values from the ppm file are more or less retained, the
color palette of the LJ250 may not match the colors on your screen. This seems to be a printer limitation.
SEE ALSO
ppm(5)
AUTHOR
Copyright (C) 1991 by Rick Vinci.
26 April 1991 ppmtosixel(1)