Best way to check for system user and password in C Post: 302383998

9 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

password check

Hi While using Pipe concept ,if a user enters a "login name" and "paswword" ,then how does a child process check for user password is correct or not and give notification to parent process.

2. Solaris

How to check the last login user were doing in the system

Hi, I'm new to solaris/ Unix and would like to know how to check in the system what was the last login user were doing. Is there any way to check this? Thanks in advanced.

3. UNIX for Advanced & Expert Users

password verification verify password of a user for only first 8 characters

Helo , I m using linux pam library for user and its password authentication. I m creating new user and giving its password.I m giving password of 10 characters.now when I login in as that newly created user its ask me $ su - ram Password: You are required to change your password immediately...

4. Cybersecurity

Periodic check of user password strength

I need to periodically run a check on the passwords of the users (Redhat 5.0) to verify that all passwords meet minimal standards. I remember seeing a script years ago that grabbed the encrypted passwords from the file and checked if they matched any of the encrypted strings in another file, plus...

5. UNIX for Dummies Questions & Answers

Check password strength

For moderator: I made a new thread in a proper part of the forum now https://www.unix.com/homework-coursework-questions/137119-user-processes.html But now i wan't to make something which isn't related to a homework, so i hope you won't close this one. Thanks to those two answers, you helped me!...

6. UNIX for Advanced & Expert Users

Check EOF char in Unix. OR To check file has been received completely from a remote system

Advance Thanks. (1) I would like to know any unix/Linux command to check EOF char in a file. (2) Or Any way I can check a file has been reached completely at machine B from machine A. Note that machine A ftp/scp the file to machine B at unknown time.

7. Shell Programming and Scripting

How to scp File from root user in one server to say crt user in another server and avoid password?

Can someone help in writing some script through which I can transfer file (scp) from root user in abc server to crt user in hfg server and can give the crt user password in script itself so that it doesn't prompt me every time for password

8. HP-UX

How to check password expiration date of particular user?

Hi Guys, I am new to HP-UX and want to find expiration date of particular user please also note i don't have root access on that server. for e.g. i have user abc on my HP box and want to know when its password going to expire and also when its password changed last time. I also try to...

9. UNIX and Linux Applications

Oracle Database - How to check if user roles and system roles are separated?

I have these two table. How do I see if user roles and system roles are seperated? SQL> desc DBA_ROLES; Name Null? Type ----------------------------------------- -------- ---------------------------- ROLE NOT NULL...

LEARN ABOUT V7

pam_authenticate

PAM_AUTHENTICATE(3)						 Linux-PAM Manual					       PAM_AUTHENTICATE(3)

NAME

       pam_authenticate - account authentication

SYNOPSIS

       #include <security/pam_appl.h>

       int pam_authenticate(pam_handle_t *pamh, int flags);

DESCRIPTION

       The pam_authenticate function is used to authenticate the user. The user is required to provide an authentication token depending upon the
       authentication service, usually this is a password, but could also be a finger print.

       The PAM service module may request that the user enter their username vio the the conversation mechanism (see pam_start(3) and
       pam_conv(3)). The name of the authenticated user will be present in the PAM item PAM_USER. This item may be recovered with a call to
       pam_get_item(3).

       The pamh argument is an authentication handle obtained by a prior call to pam_start(). The flags argument is the binary or of zero or more
       of the following values:

       PAM_SILENT
	   Do not emit any messages.

       PAM_DISALLOW_NULL_AUTHTOK
	   The PAM module service should return PAM_AUTH_ERR if the user does not have a registered authentication token.

RETURN VALUES

       PAM_ABORT
	   The application should exit immediately after calling pam_end(3) first.

       PAM_AUTH_ERR
	   The user was not authenticated.

       PAM_CRED_INSUFFICIENT
	   For some reason the application does not have sufficient credentials to authenticate the user.

       PAM_AUTHINFO_UNVAIL
	   The modules were not able to access the authentication information. This might be due to a network or hardware failure etc.

       PAM_MAXTRIES
	   One or more of the authentication modules has reached its limit of tries authenticating the user. Do not try again.

       PAM_SUCCESS
	   The user was successfully authenticated.

       PAM_USER_UNKNOWN
	   User unknown to authentication service.

SEE ALSO

       pam_start(3), pam_setcred(3), pam_chauthtok(3), pam_strerror(3), pam(7)

Linux-PAM Manual						    06/04/2011						       PAM_AUTHENTICATE(3)