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/* The ps_user type, for per-user info.
Copyright (C) 1995,96,2001 Free Software Foundation, Inc.
Written by Miles Bader <miles@gnu.org>
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2, or (at
your option) any later version.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
#include <hurd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include "ps.h"
#include "common.h"
static error_t
install_passwd (struct ps_user *u, struct passwd *pw)
{
int needed = 0;
#define COUNT(field) if (pw->field != NULL) (needed += strlen(pw->field) + 1)
COUNT (pw_name);
COUNT (pw_passwd);
COUNT (pw_gecos);
COUNT (pw_dir);
COUNT (pw_shell);
u->storage = malloc (needed);
if (u->storage != NULL)
{
char *p = u->storage;
/* Copy each string field into storage allocated in the u
structure and point the fields at that instead of the static
storage that pw currently points to. */
#define COPY(field) \
if (pw->field != NULL) \
strcpy(p, pw->field), (pw->field = p), (p += strlen (p) + 1)
COPY (pw_name);
COPY (pw_passwd);
COPY (pw_gecos);
COPY (pw_dir);
COPY (pw_shell);
u->passwd = *pw;
return 0;
}
else
return ENOMEM;
}
/* Create a ps_user for the user referred to by UID, returning it in U.
If a memory allocation error occurs, ENOMEM is returned, otherwise 0. */
error_t
ps_user_create (uid_t uid, struct ps_user **u)
{
*u = NEW (struct ps_user);
if (*u == NULL)
return ENOMEM;
(*u)->uid = uid;
(*u)->passwd_state = PS_USER_PASSWD_PENDING;
return 0;
}
/* Create a ps_user for the user referred to by UNAME, returning it in U.
If a memory allocation error occurs, ENOMEM is returned. If no such user
is known, EINVAL is returned. */
error_t
ps_user_uname_create (char *uname, struct ps_user **u)
{
struct passwd *pw = getpwnam (uname);
if (pw)
return ps_user_passwd_create (pw, u);
else
return EINVAL;
}
/* Makes makes a ps_user containing PW (which is copied). */
error_t
ps_user_passwd_create (struct passwd *pw, struct ps_user **u)
{
error_t err = 0;
*u = NEW (struct ps_user);
if (*u == NULL)
err = ENOMEM;
else
{
err = install_passwd (*u, pw);
if (err)
FREE (*u);
else
{
(*u)->passwd_state = PS_USER_PASSWD_OK;
(*u)->uid = pw->pw_uid;
}
}
return err;
}
/* Free U and any resources it consumes. */
void
ps_user_free (struct ps_user *u)
{
if (u->passwd_state == PS_USER_PASSWD_OK)
free (u->storage);
free (u);
}
/* ---------------------------------------------------------------- */
/* Returns the password file entry (struct passwd, from <pwd.h>) for the user
referred to by U, or NULL if it can't be gotten. */
struct passwd *ps_user_passwd (struct ps_user *u)
{
if (u->passwd_state == PS_USER_PASSWD_OK)
return &u->passwd;
else if (u->passwd_state == PS_USER_PASSWD_ERROR)
return NULL;
else
{
struct passwd *pw = getpwuid (u->uid);
if (pw != NULL && install_passwd (u, pw) == 0)
{
u->passwd_state = PS_USER_PASSWD_OK;
return &u->passwd;
}
else
{
u->passwd_state = PS_USER_PASSWD_ERROR;
return NULL;
}
}
}
/* Returns the user name for the user referred to by U, or NULL if it can't
be gotten. */
char *ps_user_name (struct ps_user *u)
{
struct passwd *pw = ps_user_passwd (u);
if (pw)
return pw->pw_name;
else
return NULL;
}
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