SETUID(3) Library Functions Manual SETUID(3)NAME
setuid, seteuid, setruid, setgid, setegid, setrgid - set user and group ID
SYNOPSIS
#include <sys/types.h>
setuid(uid)
seteuid(euid)
setruid(ruid)
uid_t uid, euid, ruid;
setgid(gid)
setegid(egid)
setrgid(rgid)
gid_t gid, egid, rgid;
DESCRIPTION
Setuid (setgid) sets both the real and effective user ID (group ID) of the current process to as specified.
Seteuid (setegid) sets the effective user ID (group ID) of the current process.
Setruid (setrgid) sets the real user ID (group ID) of the current process.
These calls are only permitted to the super-user or if the argument is the real or effective ID.
SEE ALSO setreuid(2), setregid(2), getuid(2), getgid(2)DIAGNOSTICS
Zero is returned if the user (group) ID is set; -1 is returned otherwise.
4.2 Berkeley Distribution May 12, 1986 SETUID(3)
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setuid(3) Library Functions Manual setuid(3)Name
setuid, seteuid, setruid, setgid, setegid, setrgid - set user and group ID
Syntax
#include <sys/types.h>
#include <unistd.h>
setuid(uid)
uid_t uid;
seteuid(euid)
uid_t euid;
setruid(ruid)
uid_t ruid;
setgid(gid)
gid_t gid;
setegid(egid)
gid_t egid;
setrgid(rgid)
gid_t rgid;
Description
The subroutine sets both the real and effective user ID of the current process to the ID specified. Likewise, the subroutine sets the real
and effective group ID of the current process to the ID specified.
The subroutine sets the effective user ID of the current process, while the subroutine sets the effective group ID of the current process.
The subroutine sets the real user ID of the current process, while the subroutine sets the real group ID of the current process.
These calls are only permitted to the super-user or if the argument is the real or effective ID.
Environment
POSIX
SYSTEM_FIVE
When your program is compiled in POSIX or System V mode the following semantics apply when using the or functions:
If the process is the super-user the real, effective, and saved set (as described in user/group ID are set to uid.
If the process is not the super-user, but uid is equal to the real or the saved set user/group ID, the effective user/group ID is set to
uid. The real and saved set user/group ID remain unchanged.
POSIX
In POSIX mode, the function returns a value of type uid_t. The function returns a value of type gid_t.
Return Values
Zero is returned if the user ID or group ID is set; -1 is returned otherwise.
See Alsosetreuid(2), setregid(2), getuid(2), getgid(2)setuid(3)
I would like to give execution rights for a script to one user. (that's the easy part...)
When that user is running the script, I would like the effective user ID to be that of the file-owner. Is this possible? (6 Replies)
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)
Hi,
I have a program with the following suid setup
-rwsr-sr-x 1 root other 653 Aug 16 17:00 restart_server
It basically starts up a service that has to be started by root. I just want the normal users to be able to restart the service using the script above.
But when the... (7 Replies)
hi all,
i have a critical and specific problem with respect to set uid bit on user and the dll's
for a binary, (under the userid A)
it needs libraries from /usr/lib and informix libraries from $INFORMIXDIR/lib/esql
but this binary should be kicked off from id B,
hence s-bit on user is... (5 Replies)
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)
Hi All,
How to prevent root user from doing setuid().
In otherwords, if the root(any user) is trying to do setuid in a program it should fail. (5 Replies)
According to Security standards given in
https://www.stanford.edu/dept/as/ia/security/policies_standards/AS_standards/RH_linux_prod_sec_std_1.0.1.html
Being a production system i want to implement the same on our server.
but when i tried finding other files i got following output.
# ls... (5 Replies)
Hi,
OS : Linux
I have an executable (P1) owned by user say "abcd" and the setuid bit is set. And there is another executable (P2) which brings up the process (P1).
When the setuid bit is set, the process P1 is failing, if the setuid bit is not set there is no issue.
I was wondering if... (6 Replies)
Hi Gurus,
I need your suggestions,to implement setuid.
Here is the situation. I have a user xyz on a solaris zone.He needs to install a package using a pkgadd command but i guess only a root can run that .Is there any way I can set the setuid bit on the pkgadd which is in the location... (6 Replies)
Dear all,
I am newbie with linux, i dont understand any code. I have googled a long time. Please help me explain about setuid bit on linux (Centos 6)
Here:
1/ I chmod u+s for /sbin/iptables but normal user still cannot perform command (ex: /sbin/iptables -L)
2/Someone says : setuid only... (6 Replies)
While I was looking for tips for hardening the security of my MAC OSX I found the following posting:
"<How to disable Setuid and Setgid Binaries >
Setuid programs run with the privileges of the file's owner
(which is often root), no matter which user executes them.
Bugs in these programs... (6 Replies)
Hi,
I have the following 3 test files to test setuid bit which if it works I would like to implement in our application. However setuid doesnot seem to be having any impact on my test below.Following are the 3 files of interest in /tmp/ folder.
$ ls -ltr *env*
-rw------- 1 g332008 users 6... (23 Replies)
I have a user AAA who's who is part of a group call clserv and techsupp, His userfiles have the following permissions:-
drwxrwx--- 16 AAA clserv 1858 Aug 22 12:48 UserFiles
he has a link in his UserFiles/
lrwxrwxrwx 1 root root 36 Mar 9 2013 TECHSUPP_GLOBAL... (5 Replies)
I'm trying - as an ordinary user - to create a file in the root directory of my system. For that purpose I wrote a simple script that echoes a string into a file. I made the file executable, used sudo to change ownership to root. Like this:
$ cat hello
#!/bin/bash
echo hello > /hello
$... (5 Replies)