NetBSD/gnu/libexec/uucp/libuuconf/tport.c

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/* tport.c
Find a port in the Taylor UUCP configuration files.
Copyright (C) 1992 Ian Lance Taylor
This file is part of the Taylor UUCP uuconf library.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License
as published by the Free Software Foundation; either version 2 of
the License, or (at your option) any later version.
This 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
The author of the program may be contacted at ian@airs.com or
c/o Infinity Development Systems, P.O. Box 520, Waltham, MA 02254.
*/
#include "uucnfi.h"
#if USE_RCS_ID
const char _uuconf_tport_rcsid[] = "$Id: tport.c,v 1.1 1993/08/04 19:35:15 jtc Exp $";
#endif
#include <errno.h>
static int ipport P((pointer pglobal, int argc, char **argv, pointer pvar,
pointer pinfo));
static int ipunknown P((pointer pglobal, int argc, char **argv,
pointer pvar, pointer pinfo));
/* Find a port in the Taylor UUCP configuration files by name, baud
rate, and special purpose function. */
int
uuconf_taylor_find_port (pglobal, zname, ibaud, ihighbaud, pifn, pinfo,
qport)
pointer pglobal;
const char *zname;
long ibaud;
long ihighbaud;
int (*pifn) P((struct uuconf_port *, pointer));
pointer pinfo;
struct uuconf_port *qport;
{
struct sglobal *qglobal = (struct sglobal *) pglobal;
FILE *e;
pointer pblock;
char *zfree;
int iret;
char **pz;
if (ihighbaud == 0L)
ihighbaud = ibaud;
e = NULL;
pblock = NULL;
zfree = NULL;
iret = UUCONF_NOT_FOUND;
for (pz = qglobal->qprocess->pzportfiles; *pz != NULL; pz++)
{
struct uuconf_cmdtab as[2];
char *zport;
struct uuconf_port sdefault;
int ilineno;
e = fopen (*pz, "r");
if (e == NULL)
{
if (FNO_SUCH_FILE ())
continue;
qglobal->ierrno = errno;
iret = UUCONF_FOPEN_FAILED | UUCONF_ERROR_ERRNO;
break;
}
qglobal->ilineno = 0;
/* Gather the default information from the top of the file. We
do this by handling the "port" command ourselves and passing
every other command to _uuconf_iport_cmd via ipunknown. The
value of zport will be an malloc block. */
as[0].uuconf_zcmd = "port";
as[0].uuconf_itype = UUCONF_CMDTABTYPE_FN | 2;
as[0].uuconf_pvar = (pointer) &zport;
as[0].uuconf_pifn = ipport;
as[1].uuconf_zcmd = NULL;
pblock = uuconf_malloc_block ();
if (pblock == NULL)
{
qglobal->ierrno = errno;
iret = UUCONF_MALLOC_FAILED | UUCONF_ERROR_ERRNO;
break;
}
_uuconf_uclear_port (&sdefault);
sdefault.uuconf_palloc = pblock;
zport = NULL;
iret = uuconf_cmd_file (pglobal, e, as, (pointer) &sdefault,
ipunknown, UUCONF_CMDTABFLAG_BACKSLASH,
pblock);
if (iret != UUCONF_SUCCESS)
{
zfree = zport;
break;
}
/* Now skip until we find a port with a matching name. If the
zname argument is NULL, we will have to read every port. */
iret = UUCONF_NOT_FOUND;
while (zport != NULL)
{
uuconf_cmdtabfn piunknown;
boolean fmatch;
if (zname == NULL || strcmp (zname, zport) == 0)
{
piunknown = ipunknown;
*qport = sdefault;
qport->uuconf_zname = zport;
zfree = zport;
fmatch = TRUE;
}
else
{
piunknown = NULL;
free ((pointer) zport);
fmatch = FALSE;
}
zport = NULL;
ilineno = qglobal->ilineno;
iret = uuconf_cmd_file (pglobal, e, as, (pointer) qport,
piunknown, UUCONF_CMDTABFLAG_BACKSLASH,
pblock);
qglobal->ilineno += ilineno;
if (iret != UUCONF_SUCCESS)
break;
iret = UUCONF_NOT_FOUND;
/* We may have just gathered information about a port. See
if it matches the name, the baud rate and the special
function. */
if (fmatch)
{
if (ibaud != 0)
{
if (qport->uuconf_ttype == UUCONF_PORTTYPE_MODEM)
{
long imbaud, imhigh, imlow;
imbaud = qport->uuconf_u.uuconf_smodem.uuconf_ibaud;
imhigh = qport->uuconf_u.uuconf_smodem.uuconf_ihighbaud;
imlow = qport->uuconf_u.uuconf_smodem.uuconf_ilowbaud;
if (imbaud == 0 && imlow == 0)
;
else if (ibaud <= imbaud && imbaud <= ihighbaud)
;
else if (imlow != 0
&& imlow <= ihighbaud
&& imhigh >= ibaud)
;
else
fmatch = FALSE;
}
else if (qport->uuconf_ttype == UUCONF_PORTTYPE_DIRECT)
{
long idbaud;
idbaud = qport->uuconf_u.uuconf_sdirect.uuconf_ibaud;
if (idbaud != 0 && idbaud != ibaud)
fmatch = FALSE;
}
}
}
if (fmatch)
{
if (pifn != NULL)
{
iret = (*pifn) (qport, pinfo);
if (iret == UUCONF_NOT_FOUND)
fmatch = FALSE;
else if (iret != UUCONF_SUCCESS)
break;
}
}
if (fmatch)
{
if (uuconf_add_block (pblock, zfree) == 0)
{
zfree = NULL;
iret = UUCONF_SUCCESS;
}
else
{
qglobal->ierrno = errno;
iret = UUCONF_MALLOC_FAILED | UUCONF_ERROR_ERRNO;
}
break;
}
if (zfree != NULL)
{
free ((pointer) zfree);
zfree = NULL;
}
}
(void) fclose (e);
e = NULL;
if (iret != UUCONF_NOT_FOUND)
break;
uuconf_free_block (pblock);
pblock = NULL;
}
if (e != NULL)
(void) fclose (e);
if (zfree != NULL)
free ((pointer) zfree);
if (iret != UUCONF_SUCCESS && pblock != NULL)
uuconf_free_block (pblock);
if (iret != UUCONF_SUCCESS && iret != UUCONF_NOT_FOUND)
{
qglobal->zfilename = *pz;
iret |= UUCONF_ERROR_FILENAME;
}
return iret;
}
/* Handle a "port" command. This copies the string onto the heap and
returns the pointer in *pvar. It returns UUCONF_CMDTABRET_EXIT to
force uuconf_cmd_file to stop reading and return to the code above,
which will then check the port just read to see if it matches. */
/*ARGSUSED*/
static int
ipport (pglobal, argc, argv, pvar, pinfo)
pointer pglobal;
int argc;
char **argv;
pointer pvar;
pointer pinfo;
{
struct sglobal *qglobal = (struct sglobal *) pglobal;
char **pz = (char **) pvar;
size_t csize;
csize = strlen (argv[1]) + 1;
*pz = malloc (csize);
if (*pz == NULL)
{
qglobal->ierrno = errno;
return (UUCONF_MALLOC_FAILED
| UUCONF_ERROR_ERRNO
| UUCONF_CMDTABRET_EXIT);
}
memcpy ((pointer) *pz, (pointer) argv[1], csize);
return UUCONF_CMDTABRET_EXIT;
}
/* Handle an unknown command by passing it on to _uuconf_iport_cmd,
which will parse it into the port structure. */
/*ARGSUSED*/
static int
ipunknown (pglobal, argc, argv, pvar, pinfo)
pointer pglobal;
int argc;
char **argv;
pointer pvar;
pointer pinfo;
{
struct sglobal *qglobal = (struct sglobal *) pglobal;
struct uuconf_port *qport = (struct uuconf_port *) pinfo;
return _uuconf_iport_cmd (qglobal, argc, argv, qport);
}