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/* Convert between 'struct utmp' and 'struct utmx'.
Copyright (C) 2002 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Bruno Haible <bruno@clisp.org>, 2002.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
/* We reuse the 'struct utmp' file format also for 'struct utmpx' records.
The mapping from 'struct utmp' to 'struct utmpx' is injective; the
reverse mapping succeeds only when common conventions are respected. */
#include <utmp.h>
#include <utmpx.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
/* Compare two 'struct utmpx' records. */
int
__utmpx_equal (const struct utmpx *u1, const struct utmpx *u2)
{
return (u1->ut_type == u2->ut_type)
&& (u1->ut_pid == u2->ut_pid)
&& (strncmp (u1->ut_line, u2->ut_line, __UT_LINESIZE) == 0)
&& (strncmp (u1->ut_id, u2->ut_id, sizeof (u1->ut_id)) == 0)
&& (strncmp (u1->ut_user, u2->ut_user, __UT_NAMESIZE) == 0)
&& (strncmp (u1->ut_host, u2->ut_host, __UT_HOSTSIZE) == 0)
&& (u1->ut_exit.e_termination == u2->ut_exit.e_termination)
&& (u1->ut_exit.e_exit == u2->ut_exit.e_exit)
&& (u1->ut_session == u2->ut_session)
&& (u1->ut_tv.tv_sec == u2->ut_tv.tv_sec)
&& (u1->ut_tv.tv_usec == u2->ut_tv.tv_usec)
&& (memcmp (u1->ut_addr_v6, u2->ut_addr_v6, sizeof (u1->ut_addr_v6))
== 0);
}
int
__utmp_to_utmpx (const struct utmp *u, struct utmpx *ux)
{
memset (ux, '\0', sizeof (struct utmpx));
if (u->ut_line[0] == '\0' && u->ut_name[0] == '\0' && u->ut_host[0] == '\0')
{
ux->ut_type = EMPTY;
}
else
{
if (u->ut_line[0] == '~' && u->ut_line[1] == '\0')
{
if (strncmp (u->ut_name, "runlevel", UT_NAMESIZE) == 0)
ux->ut_type = RUN_LVL;
else if (strncmp (u->ut_name, "reboot", UT_NAMESIZE) == 0)
ux->ut_type = BOOT_TIME;
else if (strncmp (u->ut_name, "acct", UT_NAMESIZE) == 0)
ux->ut_type = ACCOUNTING;
else
return -1;
}
else if (u->ut_line[0] == '{' && u->ut_line[1] == '\0')
{
if (strncmp (u->ut_name, "date", UT_NAMESIZE) == 0)
ux->ut_type = NEW_TIME;
else
return -1;
}
else if (u->ut_line[0] == '|' && u->ut_line[1] == '\0')
{
if (strncmp (u->ut_name, "date", UT_NAMESIZE) == 0)
ux->ut_type = OLD_TIME;
else
return -1;
}
else
{
if (strncmp (u->ut_name, "INIT", UT_NAMESIZE) == 0)
ux->ut_type = INIT_PROCESS;
else if (strncmp (u->ut_name, "LOGIN", UT_NAMESIZE) == 0)
ux->ut_type = LOGIN_PROCESS;
else if (strncmp (u->ut_name, "", UT_NAMESIZE) == 0)
ux->ut_type = DEAD_PROCESS;
else
ux->ut_type = USER_PROCESS;
if (ux->ut_type == LOGIN_PROCESS || ux->ut_type == USER_PROCESS)
strncpy (ux->ut_user, u->ut_name, UT_NAMESIZE);
if (strncmp (u->ut_line, "tty", 3) == 0)
{
strncpy (ux->ut_line, u->ut_line, UT_LINESIZE);
strncpy (ux->ut_id, u->ut_line + 3, sizeof (ux->ut_id));
}
else
{
strncpy (ux->ut_id, u->ut_line, sizeof (ux->ut_id));
}
}
strncpy (ux->ut_host, u->ut_host, UT_HOSTSIZE);
/* Hack: Recover the ut_pid from the hidden place after the host. */
if (__strnlen (u->ut_host, UT_HOSTSIZE) < UT_HOSTSIZE - 2)
{
const char *hidden = u->ut_host + strlen (u->ut_host) + 1;
if (hidden[0] != '\0')
{
size_t n = UT_HOSTSIZE - strlen (u->ut_host) - 1;
char buf[UT_HOSTSIZE];
unsigned long pid;
char *endp;
strncpy (buf, hidden, n);
buf[n] = '\0';
pid = strtoul (buf, &endp, 10);
if (endp != buf && *endp == '\0')
ux->ut_pid = pid;
}
}
ux->ut_tv.tv_sec = u->ut_time;
ux->ut_tv.tv_usec = 0;
}
return 0;
}
int
__utmpx_to_utmp (const struct utmpx *ux, struct utmp *u)
{
char buf[10+1];
switch (ux->ut_type)
{
case EMPTY:
strncpy (u->ut_line, "", UT_LINESIZE);
strncpy (u->ut_name, "", UT_NAMESIZE);
strncpy (u->ut_host, "", UT_HOSTSIZE);
break;
case RUN_LVL:
strncpy (u->ut_line, "~", UT_LINESIZE);
strncpy (u->ut_name, "runlevel", UT_NAMESIZE);
strncpy (u->ut_host, ux->ut_host, UT_HOSTSIZE);
break;
case BOOT_TIME:
strncpy (u->ut_line, "~", UT_LINESIZE);
strncpy (u->ut_name, "reboot", UT_NAMESIZE);
strncpy (u->ut_host, ux->ut_host, UT_HOSTSIZE);
break;
case NEW_TIME:
strncpy (u->ut_line, "{", UT_LINESIZE);
strncpy (u->ut_name, "date", UT_NAMESIZE);
strncpy (u->ut_host, ux->ut_host, UT_HOSTSIZE);
break;
case OLD_TIME:
strncpy (u->ut_line, "|", UT_LINESIZE);
strncpy (u->ut_name, "date", UT_NAMESIZE);
strncpy (u->ut_host, ux->ut_host, UT_HOSTSIZE);
break;
case INIT_PROCESS:
case LOGIN_PROCESS:
case USER_PROCESS:
case DEAD_PROCESS:
if (ux->ut_line[0] != '\0')
strncpy (u->ut_line, ux->ut_line, UT_LINESIZE);
else
strncpy (u->ut_line, ux->ut_id, sizeof (ux->ut_id));
switch (ux->ut_type)
{
case INIT_PROCESS:
strncpy (u->ut_name, "INIT", UT_NAMESIZE);
break;
case LOGIN_PROCESS:
strncpy (u->ut_name, "LOGIN", UT_NAMESIZE);
break;
case USER_PROCESS:
strncpy (u->ut_name, ux->ut_user, UT_NAMESIZE);
break;
case DEAD_PROCESS:
strncpy (u->ut_name, "", UT_NAMESIZE);
break;
}
strncpy (u->ut_host, ux->ut_host, UT_HOSTSIZE);
break;
case ACCOUNTING:
strncpy (u->ut_line, "~", UT_LINESIZE);
strncpy (u->ut_name, "acct", UT_NAMESIZE);
strncpy (u->ut_host, ux->ut_host, UT_HOSTSIZE);
break;
default:
return -1;
}
u->ut_time = ux->ut_tv.tv_sec;
/* Hack: Put the ut_pid at a hidden place where there is likely room. */
if (ux->ut_pid != 0)
{
size_t room = UT_HOSTSIZE - strlen (u->ut_host) - 1;
sprintf (buf, "%lu", (unsigned long) ux->ut_pid);
if (strlen (buf) <= room)
strncpy (u->ut_host + strlen (u->ut_host) + 1, buf, room);
}
return 0;
}
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