Linux and UNIX Man Pages

Linux & Unix Commands - Search Man Pages

geteuid(2) [bsd man page]

GETUID(2)							System Calls Manual							 GETUID(2)

getuid, geteuid - get user identity SYNOPSIS
#include <sys/types.h> uid = getuid() uid_t uid; euid = geteuid() uid_t euid; DESCRIPTION
Getuid returns the real user ID of the current process, geteuid the effective user ID. The real user ID identifies the person who is logged in. The effective user ID gives the process additional permissions during execution of "set-user-ID" mode processes, which use getuid to determine the real-user-id of the process that invoked them. SEE ALSO
getgid(2), setreuid(2) 4th Berkeley Distribution January 7, 1986 GETUID(2)

Check Out this Related Man Page

GETUID(2)						     Linux Programmer's Manual							 GETUID(2)

getuid, geteuid - get user identity SYNOPSIS
#include <unistd.h> #include <sys/types.h> uid_t getuid(void); uid_t geteuid(void); DESCRIPTION
getuid() returns the real user ID of the calling process. geteuid() returns the effective user ID of the calling process. When a normal program is executed, the effective and real user ID of the process are set to the ID of the user executing the file. When a set ID program is executed the real user ID is set to the calling user and the effective user ID corresponds to the set ID bit on the file being executed. ERRORS
These functions are always successful. CONFORMING TO
POSIX.1-2001, 4.3BSD. NOTES
History In Unix V6 the getuid() call returned (euid << 8) + uid. Unix V7 introduced separate calls getuid() and geteuid(). SEE ALSO
getresuid(2), setreuid(2), setuid(2), credentials(7) COLOPHON
This page is part of release 3.27 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at Linux 1993-07-23 GETUID(2)
Man Page

11 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Help on these two needed ...!!

Folks I need help on following two. 1. Say i am getting two values like this ::1:953 and :::8005 I need to replace "::" (first two colons with a * ).I can get these values in a variable.How to tweak this variable to separate out the way i want? Anything after third ":" should be set... (9 Replies)
Discussion started by: ak835
9 Replies

2. UNIX for Dummies Questions & Answers

Beginner:user ID's and group ID's

Hello Gurus, I just started Unix, i am neither a student nor a proffessional. i just completed my masters degree and looking for a career in Unix/Linux. so i will be preparing for myself with the help of different forum's guru's. i just completed the os basics and going through baiscs of... (3 Replies)
Discussion started by: juststarted
3 Replies

3. Cybersecurity

the SUID of lpq

Hello My system is Debian-503-amd64. After I installed the "lpr" package, I found that some files with SUID bit come from this package. As: ls -l /usr/bin/lp* .... -rwsr-sr-x 1 root lp 31800 2008-05-20 /usr/bin/lpq -rwsr-sr-x 1 root lp 28504 2008-05-20 /usr/bin/lpr -rwsr-sr-x 1... (1 Reply)
Discussion started by: ZR_Lang
1 Replies

4. Shell Programming and Scripting

Question: Automatic launching of a CLI menu upon login (OpenBSD)

Hi all, I am OpenBSD newbie and currently need to manage some OpenBSD firewalls running pf. The OpenBSD version is 4.8 As the other sys admins are not so familiar with OpenBSD, so I have an idea across in my mind on how to minimize the root account usage and other unnecessary access and make... (9 Replies)
Discussion started by: lcxpics
9 Replies

5. UNIX for Dummies Questions & Answers

[Solved] effective user id upon exec

Hello all. Despite the exec man page, the exec system call seems to turn my effective-user-id into my real-user-id. I coded and compiled 2 very simple c programs as user 1 (uid=501) The first one (A) prints real and effective user IDs and then execs the second one (B), which in turn prints... (7 Replies)
Discussion started by: oviv
7 Replies

6. Solaris

Unable to login password less authentication

Hi, I am facing strange problem in solaris 10. My requirement is that on server A using user test, any user which is created on Server B will be able to login wihtout password (ssh) from Server A All the users which are on Server B are able able to login from Server A using test user. ... (8 Replies)
Discussion started by: manoj.solaris
8 Replies

7. Linux

Sendmail takes too long to start and the host is unable to send emails

Hello All, Sendmail takes too long to start and the host is unable to send emails, below are the steps followed, Please let me know if I'm missing anything, is there a debug mode for mailx? # time service sendmail restart Shutting down sm-client: Shutting... (6 Replies)
Discussion started by: lovesaikrishna
6 Replies

8. Cybersecurity

How to diff between 2 users with uid 0?

Hello, I created a new user "rootNew" After creation I manually change the file /etc/passwd and gave the new user "rootNew" uid 0. Now I have 2 users with uid 0 (root,rootNew) how can I know which user is log in the system? "whoami" command return "root" for both users. Thanks, Uri (10 Replies)
Discussion started by: urip
10 Replies

9. UNIX for Advanced & Expert Users

Allow user without dir write permission to execute a script that creates files

In our project we have several unix scripts that trigger different processes. These scripts write logs to a particular folder 'sesslogs', create output data files in a separate directory called 'datafiles' etc. Usually L1 support team re-run these scripts . We donot want L1 support team to have... (14 Replies)
Discussion started by: waavman
14 Replies

10. Shell Programming and Scripting

Moving XML tag/contents after specific XML tag within same file

Hi Forum. I have an XML file with the following requirement to move the <AdditionalAccountHolders> tag and its content right after the <accountHolderName> tag within the same file but I'm not sure how to accomplish this through a Unix script. Any feedback will be greatly appreciated. ... (19 Replies)
Discussion started by: pchang
19 Replies

11. UNIX for Beginners Questions & Answers

NTP synchronised problem in our Centos 7.6 node

Someone, please help on this issue:- Note : for security reason i didn't mention hostnames and ips. ============================================================================== # ntpstat unsynchronised polling server every 1024 s Ntpstat showing unsynchronised. ... (29 Replies)
Discussion started by: shanmugaraj
29 Replies