300 lines
7.4 KiB
C
300 lines
7.4 KiB
C
/* tport.c
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Find a port in the Taylor UUCP configuration files.
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Copyright (C) 1992, 1993 Ian Lance Taylor
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This file is part of the Taylor UUCP uuconf library.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License
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as published by the Free Software Foundation; either version 2 of
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the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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The author of the program may be contacted at ian@airs.com or
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c/o Cygnus Support, Building 200, 1 Kendall Square, Cambridge, MA 02139.
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*/
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#include "uucnfi.h"
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#if USE_RCS_ID
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const char _uuconf_tport_rcsid[] = "$Id: tport.c,v 1.7 1994/01/30 21:14:29 ian Rel $";
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#endif
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#include <errno.h>
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static int ipport P((pointer pglobal, int argc, char **argv, pointer pvar,
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pointer pinfo));
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static int ipunknown P((pointer pglobal, int argc, char **argv,
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pointer pvar, pointer pinfo));
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/* Find a port in the Taylor UUCP configuration files by name, baud
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rate, and special purpose function. */
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int
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uuconf_taylor_find_port (pglobal, zname, ibaud, ihighbaud, pifn, pinfo,
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qport)
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pointer pglobal;
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const char *zname;
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long ibaud;
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long ihighbaud;
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int (*pifn) P((struct uuconf_port *, pointer));
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pointer pinfo;
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struct uuconf_port *qport;
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{
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struct sglobal *qglobal = (struct sglobal *) pglobal;
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FILE *e;
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pointer pblock;
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char *zfree;
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int iret;
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char **pz;
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if (ihighbaud == 0L)
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ihighbaud = ibaud;
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e = NULL;
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pblock = NULL;
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zfree = NULL;
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iret = UUCONF_NOT_FOUND;
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for (pz = qglobal->qprocess->pzportfiles; *pz != NULL; pz++)
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{
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struct uuconf_cmdtab as[2];
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char *zport;
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struct uuconf_port sdefault;
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int ilineno;
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e = fopen (*pz, "r");
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if (e == NULL)
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{
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if (FNO_SUCH_FILE ())
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continue;
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qglobal->ierrno = errno;
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iret = UUCONF_FOPEN_FAILED | UUCONF_ERROR_ERRNO;
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break;
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}
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qglobal->ilineno = 0;
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/* Gather the default information from the top of the file. We
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do this by handling the "port" command ourselves and passing
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every other command to _uuconf_iport_cmd via ipunknown. The
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value of zport will be an malloc block. */
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as[0].uuconf_zcmd = "port";
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as[0].uuconf_itype = UUCONF_CMDTABTYPE_FN | 2;
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as[0].uuconf_pvar = (pointer) &zport;
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as[0].uuconf_pifn = ipport;
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as[1].uuconf_zcmd = NULL;
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pblock = uuconf_malloc_block ();
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if (pblock == NULL)
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{
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qglobal->ierrno = errno;
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iret = UUCONF_MALLOC_FAILED | UUCONF_ERROR_ERRNO;
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break;
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}
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_uuconf_uclear_port (&sdefault);
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sdefault.uuconf_palloc = pblock;
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zport = NULL;
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iret = uuconf_cmd_file (pglobal, e, as, (pointer) &sdefault,
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ipunknown, UUCONF_CMDTABFLAG_BACKSLASH,
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pblock);
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if (iret != UUCONF_SUCCESS)
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{
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zfree = zport;
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break;
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}
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/* Now skip until we find a port with a matching name. If the
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zname argument is NULL, we will have to read every port. */
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iret = UUCONF_NOT_FOUND;
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while (zport != NULL)
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{
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uuconf_cmdtabfn piunknown;
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boolean fmatch;
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if (zname == NULL || strcmp (zname, zport) == 0)
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{
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piunknown = ipunknown;
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*qport = sdefault;
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qport->uuconf_zname = zport;
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zfree = zport;
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fmatch = TRUE;
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}
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else
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{
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piunknown = NULL;
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free ((pointer) zport);
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fmatch = FALSE;
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}
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zport = NULL;
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ilineno = qglobal->ilineno;
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iret = uuconf_cmd_file (pglobal, e, as, (pointer) qport,
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piunknown, UUCONF_CMDTABFLAG_BACKSLASH,
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pblock);
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qglobal->ilineno += ilineno;
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if (iret != UUCONF_SUCCESS)
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break;
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iret = UUCONF_NOT_FOUND;
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/* We may have just gathered information about a port. See
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if it matches the name, the baud rate and the special
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function. */
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if (fmatch)
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{
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if (ibaud != 0)
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{
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if (qport->uuconf_ttype == UUCONF_PORTTYPE_MODEM)
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{
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long imbaud, imhigh, imlow;
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imbaud = qport->uuconf_u.uuconf_smodem.uuconf_ibaud;
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imhigh = qport->uuconf_u.uuconf_smodem.uuconf_ihighbaud;
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imlow = qport->uuconf_u.uuconf_smodem.uuconf_ilowbaud;
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if (imbaud == 0 && imlow == 0)
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;
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else if (ibaud <= imbaud && imbaud <= ihighbaud)
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;
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else if (imlow != 0
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&& imlow <= ihighbaud
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&& imhigh >= ibaud)
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;
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else
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fmatch = FALSE;
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}
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else if (qport->uuconf_ttype == UUCONF_PORTTYPE_DIRECT)
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{
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long idbaud;
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idbaud = qport->uuconf_u.uuconf_sdirect.uuconf_ibaud;
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if (idbaud != 0 && idbaud != ibaud)
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fmatch = FALSE;
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}
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}
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}
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if (fmatch)
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{
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if (pifn != NULL)
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{
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iret = (*pifn) (qport, pinfo);
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if (iret == UUCONF_NOT_FOUND)
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fmatch = FALSE;
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else if (iret != UUCONF_SUCCESS)
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break;
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}
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}
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if (fmatch)
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{
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if (uuconf_add_block (pblock, zfree) == 0)
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{
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zfree = NULL;
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iret = UUCONF_SUCCESS;
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}
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else
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{
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qglobal->ierrno = errno;
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iret = UUCONF_MALLOC_FAILED | UUCONF_ERROR_ERRNO;
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}
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break;
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}
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if (zfree != NULL)
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{
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free ((pointer) zfree);
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zfree = NULL;
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}
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}
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(void) fclose (e);
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e = NULL;
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if (iret != UUCONF_NOT_FOUND)
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break;
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uuconf_free_block (pblock);
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pblock = NULL;
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}
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if (e != NULL)
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(void) fclose (e);
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if (zfree != NULL)
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free ((pointer) zfree);
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if (iret != UUCONF_SUCCESS && pblock != NULL)
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uuconf_free_block (pblock);
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if (iret != UUCONF_SUCCESS && iret != UUCONF_NOT_FOUND)
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{
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qglobal->zfilename = *pz;
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iret |= UUCONF_ERROR_FILENAME;
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}
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return iret;
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}
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/* Handle a "port" command. This copies the string onto the heap and
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returns the pointer in *pvar. It returns UUCONF_CMDTABRET_EXIT to
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force uuconf_cmd_file to stop reading and return to the code above,
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which will then check the port just read to see if it matches. */
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/*ARGSUSED*/
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static int
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ipport (pglobal, argc, argv, pvar, pinfo)
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pointer pglobal;
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int argc;
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char **argv;
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pointer pvar;
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pointer pinfo;
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{
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struct sglobal *qglobal = (struct sglobal *) pglobal;
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char **pz = (char **) pvar;
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size_t csize;
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csize = strlen (argv[1]) + 1;
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*pz = malloc (csize);
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if (*pz == NULL)
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{
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qglobal->ierrno = errno;
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return (UUCONF_MALLOC_FAILED
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| UUCONF_ERROR_ERRNO
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| UUCONF_CMDTABRET_EXIT);
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}
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memcpy ((pointer) *pz, (pointer) argv[1], csize);
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return UUCONF_CMDTABRET_EXIT;
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}
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/* Handle an unknown command by passing it on to _uuconf_iport_cmd,
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which will parse it into the port structure. */
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/*ARGSUSED*/
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static int
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ipunknown (pglobal, argc, argv, pvar, pinfo)
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pointer pglobal;
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int argc;
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char **argv;
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pointer pvar;
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pointer pinfo;
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{
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struct sglobal *qglobal = (struct sglobal *) pglobal;
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struct uuconf_port *qport = (struct uuconf_port *) pinfo;
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int iret;
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iret = _uuconf_iport_cmd (qglobal, argc, argv, qport);
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if (UUCONF_ERROR_VALUE (iret) != UUCONF_SUCCESS)
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iret |= UUCONF_CMDTABRET_EXIT;
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return iret;
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}
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