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/*
* SCCS: @(#)sysent.c 1.9 (98/08/28)
*
* UniSoft Ltd., London, England
*
* (C) Copyright 1992 X/Open Company Limited
*
* All rights reserved. No part of this source code may be reproduced,
* stored in a retrieval system, or transmitted, in any form or by any
* means, electronic, mechanical, photocopying, recording or otherwise,
* except as stated in the end-user licence agreement, without the prior
* permission of the copyright owners.
*
* X/Open and the 'X' symbol are trademarks of X/Open Company Limited in
* the UK and other countries.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
/************************************************************************
SCCS: @(#)sysent.c 1.9 98/08/28 TETware release 3.3
NAME: sysent.c
PRODUCT: TETware
AUTHOR: Andrew Dingwall, UniSoft Ltd.
DATE CREATED: April 1992
DESCRIPTION:
systems file search function
MODIFICATIONS:
Denis McConalogue, DTET Development, May 1993
XTI support - allow TCCD XTI addresses to be included in
the systems file.
Andrew Dingwall, UniSoft Ltd., July 1997
added support the MT DLL version of the C runtime support library
on Win32 systems
Andrew Dingwall, UniSoft Ltd., July 1998
Added support for shared API libraries.
************************************************************************/
#ifndef TET_LITE /* -START-LITE-CUT- */
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include "dtmac.h"
#include "sysent.h"
#include "error.h"
#include "globals.h"
#include "dtetlib.h"
static FILE *sfp = NULL; /* systems file stream pointer */
/*
** tet_libgetsysent() - get an entry from the systems file
** and return a pointer thereto
**
** return (struct sysent *) 0 on error
**
** warning: the string pointed to by sy.sy_name is stored in the static
** buffer owned by fgetargs() so, if it is needed, it should be copied
** to somewhere less exposed soon after a call to tet_libgetsysent()
*/
struct sysent *tet_libgetsysent()
{
static struct sysent sysent;
char *args[3];
register int rc;
if (sfp == NULL && tet_libsetsysent() < 0)
return((struct sysent *) 0);
rc = 0;
while (rc < 2)
if ((rc = tet_fgetargs(sfp, args, 3)) == EOF)
return((struct sysent *) 0);
sysent.sy_sysid = atoi(args[0]);
sysent.sy_name = args[1];
if (rc > 2)
sysent.sy_tccd = args[2];
else
sysent.sy_tccd = (char *)0;
return(&sysent);
}
/*
** tet_libsetsysent() - rewind to the start of the systems file,
** opening it if necessary
**
** return 0 if successful or -1 on error
*/
int tet_libsetsysent()
{
static char file[] = "systems";
char path[MAXPATH + 1];
if (sfp != NULL) {
rewind(sfp);
return(0);
}
ASSERT(tet_root[0]);
(void) sprintf(path, "%.*s/%s",
(int) sizeof path - (int) sizeof file - 1, tet_root, file);
if ((sfp = fopen(path, "r")) == NULL) {
error(errno, "can't open", path);
return(-1);
}
(void) tet_fioclex(FILENO(sfp));
return(0);
}
/*
** tet_libendsysent() - close the systems file
*/
void tet_libendsysent()
{
if (sfp != NULL) {
(void) fclose(sfp);
sfp = NULL;
}
}
#else /* -END-LITE-CUT- */
int tet_sysent_c_not_empty;
#endif /* !TET_LITE */ /* -LITE-CUT-LINE- */
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