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Top Forums UNIX for Dummies Questions & Answers How to find All Primary and Secondary Group ID's for a user Post 18314 by sanjay92 on Wednesday 27th of March 2002 01:35:06 AM
Old 03-27-2002
Bug

Thanks !
I always looked in the default id command and I did not look in the options.
This will work for me.

Sanjay

Quote:
Originally posted by killerserv
Have you try the id command ?

id [-gnruG] [--group] [--name] [--real] [--user] [--groups] [--help] [--version] [username]

By default, it prints the real user ID, real group ID, effective user ID if different from the real user ID, effective group ID if dif ferent from the real group ID, and supplemental group IDs. It prints each of these values preceded by a string identifying it and followed by the corresponding user or group name in parentheses. Post back if this doesnt help..
sanjay92
 

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

NAME
setreuid, setregid - set real and/or effective user or group ID SYNOPSIS
#include <sys/types.h> #include <unistd.h> int setreuid(uid_t ruid, uid_t euid); int setregid(gid_t rgid, gid_t egid); DESCRIPTION
setreuid sets real and effective user IDs of the current process. Unprivileged users may only set the real user ID to the real user ID or the effective user ID, and may only set the effective user ID to the real user ID, the effective user ID or the saved user ID. Supplying a value of -1 for either the real or effective user ID forces the system to leave that ID unchanged. If the real user ID is set or the effective user ID is set to a value not equal to the previous real user ID, the saved user ID will be set to the new effective user ID. Completely analogously, setregid sets real and effective group ID's of the current process, and all of the above holds with "group" instead of "user". RETURN VALUE
On success, zero is returned. On error, -1 is returned, and errno is set appropriately. ERRORS
EPERM The current process is not the super-user and changes other than (i) swapping the effective user (group) ID with the real user (group) ID, or (ii) setting one to the value of the other or (iii) setting the effective user (group) ID to the value of the saved user (group) ID was specified. NOTES
Setting the effective user (group) ID to the saved user ID is possible since Linux 1.1.37 (1.1.38). CONFORMING TO
BSD 4.3 (the setreuid and setregid function calls first appeared in 4.2BSD). SEE ALSO
getuid(2), getgid(2), setuid(2), setgid(2), seteuid(2), setresuid(2) Linux 1.1.38 1994-08-02 SETREUID(2)

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