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EnigmA Amiga Run 1996 February
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EnigmA AMIGA RUN 04 (1996)(G.R. Edizioni)(IT)[!][issue 1996-02][Skylink CD III].iso
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usergroup
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loginname.c
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1992-09-02
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RCS_ID_C="$Id: loginname.c,v 2.1 1994/02/17 02:21:58 ppessi Exp $";
/*
* loginname.c - Login name handling
*
* Author: ppessi <Pekka.Pessi@hut.fi>
*
* This file is part of the AmiTCP/IP User Library.
*
* Copyright © 1993 AmiTCP/IP Group, <AmiTCP-Group@hut.fi>
* Helsinki University of Technology, Finland.
*
* Created : Sun Nov 28 17:45:55 1993 ppessi
* Last modified: Thu Jan 27 08:39:51 1994 ppessi
*
* $Log: loginname.c,v $
* Revision 2.1 1994/02/17 02:21:58 ppessi
* *** empty log message ***
*
* Revision 1.2 1994/01/21 08:13:47 ppessi
* Updated documentation
*
* Revision 1.1 1994/01/19 10:05:48 ppessi
* Initial revision
*
*/
#include "base.h"
#include "credential.h"
#include "libfunc.h"
#include <string.h>
#include <exec/memory.h>
/****** usergroup.library/getlogin *******************************************
NAME
getlogin - get login name
SYNOPSIS
name = getlogin()
D0
char *getlogin(void)
FUNCTION
The getlogin() routine returns the login name of the user associated
with the current session, as previously set by setlogin(). The name
is normally associated with a console at the time a session is
created, and is inherited by all processes descended from the login
process. (This is true even if some of those processes assume
another user ID, for example when su is used.)
INPUTS
RESULT
name - pointer to login name
SEE ALSO
setlogin()
****************************************************************************
*/
SAVEDS ASM char *R_getlogin(void)
{
static char buffer[MAXLOGNAME];
struct proc *p;
lock(proc_list);
p = procfind(NULL);
memcpy(buffer, p->p_session->s_login, MAXLOGNAME);
unlock(proc_list);
return buffer;
}
/****** usergroup.library/setlogin *******************************************
NAME
setlogin - set login name
SYNOPSIS
success = setlogin(name)
D0 A1
int setlogin(const char *);
FUNCTION
The function setlogin() sets the login name of the user associated
with the current session to name. This call is restricted to the
super-user, and is normally used only when a new session is being
created on behalf of the named user (for example, at login time, or
when a remote shell is invoked).
INPUTS
name - Buffer to hold login name
RESULT
If a call to setlogin() succeeds, a value of 0 is returned. If
setlogin() fails, a value of -1 is returned and an error code is
placed into global errno location.
ERRORS
[EPERM] - The caller has got no necessary privileges.
[EFAULT] - The name parameter gave an invalid address.
[EINVAL] - The name parameter pointed to a string that was too long.
Login names are limited to MAXLOGNAME (from <sys/param.h>)
characters, currently 16.
BUGS
SEE ALSO
getlogin()
**********************************************************************
*/
SAVEDS ASM int R_setlogin(REG(a1) const char *buffer)
{
struct proc *p;
int error;
if (buffer == NULL) {
error = EFAULT;
} else if (strlen(buffer) > MAXLOGNAME - 1) {
error = EINVAL;
} else {
p = procfind(NULL);
error = suser(p->p_cred->pc_ucred);
if (!error) {
strncpy(p->p_session->s_login, buffer, MAXLOGNAME);
p->p_session->s_login[MAXLOGNAME - 1] = '\0';
return 0;
}
}
SetErrno(error);
return -1;
}