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/* The ps_tty type, for per-tty info.
Copyright (C) 1995, 1996 Free Software Foundation, Inc.
Written by Miles Bader <miles@gnu.ai.mit.edu>
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 <hurd/term.h>
#include "ps.h"
#include "common.h"
#include "ps_term.h"
/* ---------------------------------------------------------------- */
/* Create a ps_tty for the tty referred to by PORT, returning it in TTY.
If a memory allocation error occurs, ENOMEM is returned, otherwise 0. */
error_t
ps_tty_create (file_t port, struct ps_tty **tty)
{
*tty = NEW (struct ps_tty);
if (*tty == NULL)
return ENOMEM;
(*tty)->port = port;
(*tty)->name_state = PS_TTY_NAME_PENDING;
(*tty)->short_name = NULL;
(*tty)->short_name_alloced = FALSE;
return 0;
}
/* Frees TTY and any resources it consumes. */
void
ps_tty_free (struct ps_tty *tty)
{
mach_port_deallocate(mach_task_self (), tty->port);
if (tty->name_state == PS_TTY_NAME_OK && tty->name != NULL)
free ((char *)tty->name);
if (tty->short_name_alloced)
free ((char *)tty->short_name);
free (tty);
}
/* ---------------------------------------------------------------- */
/* Returns the name of the tty, or NULL if it can't be figured out. */
const char *
ps_tty_name (struct ps_tty *tty)
{
if (tty->name_state == PS_TTY_NAME_PENDING)
{
string_t buf;
if (ps_term_get_nodename (tty->port, buf) != 0)
/* There is a terminal there, but we can't figure out its name. */
tty->name_state = PS_TTY_NAME_ERROR;
else
{
tty->name = strdup (buf);
tty->name_state = (tty->name ? PS_TTY_NAME_OK : PS_TTY_NAME_ERROR);
}
}
if (tty->name_state == PS_TTY_NAME_OK)
return tty->name;
else
return NULL;
}
/* ---------------------------------------------------------------- */
struct ps_tty_abbrev
{
char *pfx;
char *subst;
};
struct ps_tty_abbrev ps_tty_abbrevs[] =
{
{ "/tmp/console", "oc" }, /* temp hack */
{ "/dev/console", "co"},
{ "/dev/tty", ""},
{ "/dev/pty", ""},
{ "/dev/", ""},
{ 0 }
};
/* Returns the standard abbreviated name of the tty, the whole name if there
is no standard abbreviation, or NULL if it can't be figured out. */
const char *
ps_tty_short_name (struct ps_tty *tty)
{
if (tty->short_name != NULL)
return tty->short_name;
else
{
struct ps_tty_abbrev *abbrev;
const char *name = ps_tty_name (tty);
if (name)
for (abbrev = ps_tty_abbrevs; abbrev->pfx != NULL; abbrev++)
{
char *subst = abbrev->subst;
unsigned pfx_len = strlen (abbrev->pfx);
if (strncmp (name, abbrev->pfx, pfx_len) == 0)
{
if (name[pfx_len] == '\0')
tty->short_name = abbrev->subst;
else if (!subst || subst[0] == '\0')
tty->short_name = name + pfx_len;
else
{
char *n = malloc (strlen(subst) + strlen (name + pfx_len));
if (n)
{
strcpy (n, subst);
strcat (n, name + pfx_len);
tty->short_name = n;
tty->short_name_alloced = TRUE;
}
}
break;
}
}
if (tty->short_name == NULL)
tty->short_name = name;
return tty->short_name;
}
}
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