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886c1fae06
Many style/formatting edits. Bug fixes. Reverted some previous changes temporarily while reviewing new code. Merged Baker's "virtual device" in a simpler form. ODS2 will assign a sensible drive name when mounting /image (== /virtual). If a specific drive name is desired, mount /image drivename=filespec. Files can be quoted, or use set qualifier_style unix if slashes are a problem. Note that mount on the command line allows tab completion. Moved "statistics" command into show. Coded support for import/binary (fixed records, 512 bytes). Converted fgets to fgetline Added show devices for Unix (limited by standard APIs) Got rid of separate ODS2-Image build.
108 lines
3.1 KiB
C
108 lines
3.1 KiB
C
/* Device.c V2.1 Module to remember and find devices...*/
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/*
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This is part of ODS2 written by Paul Nankervis,
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email address: Paulnank@au1.ibm.com
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ODS2 is distributed freely for all members of the
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VMS community to use. However all derived works
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must maintain comments in their source to acknowledge
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the contibution of the original author.
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*/
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/* Should have mechanism to return actual device name... */
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/* This module is simple enough - it just keeps track of
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device names and initialization... */
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#include <ctype.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "access.h"
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#include "cache.h"
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#include "device.h"
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#include "ssdef.h"
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static void *device_create( unsigned devsiz, void *keyval, unsigned *retsts );
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static int device_compare( unsigned keylen, void *keyval, void *node );
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static struct DEV *dev_root = NULL;
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/************************************************************ device_create() */
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/* device_create() creates a device object... */
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static void *device_create( unsigned devsiz, void *keyval, unsigned *retsts ) {
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register struct DEV *dev;
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dev = (struct DEV *) malloc( sizeof( struct DEV ) + devsiz + 1 );
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if ( dev == NULL ) {
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*retsts = SS$_INSFMEM;
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return NULL;
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}
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dev->cache.objmanager = NULL;
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dev->cache.objtype = OBJTYPE_DEV;
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dev->vcb = NULL;
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dev->access = 0;
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memcpy( dev->devnam, keyval, devsiz );
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memcpy( dev->devnam + devsiz, ":", 2 );
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*retsts = SS$_NORMAL;
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return dev;
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}
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/*********************************************************** device_compare() */
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/* device_compare() compares a device name to that of a device object... */
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static int device_compare( unsigned keylen, void *keyval, void *node ) {
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register int cmp;
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register const char *keynam = (const char *) keyval;
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register const char *devnam = ((const struct DEV *) node)->devnam;
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cmp = 0;
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while ( keylen-- > 0 ) {
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cmp = toupper( *keynam++ ) - toupper( *devnam++ );
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if ( cmp != 0 ) {
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break;
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}
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}
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if ( cmp == 0 && *devnam != '\0' && *devnam != ':' ) {
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cmp = -1;
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}
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return cmp;
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}
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/************************************************************ device_lookup() */
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/* device_lookup() is to to find devices... */
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unsigned device_lookup( unsigned devlen, char *devnam, int create,
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struct DEV **retdev ) {
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unsigned sts, devsiz;
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register struct DEV *dev;
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for ( devsiz = 0; devsiz < devlen; devsiz++ ) {
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if ( devnam[devsiz] == ':' ) {
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break;
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}
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}
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dev = (struct DEV *) cache_find( (void *) &dev_root, devsiz, devnam, &sts,
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device_compare,
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create ? device_create : NULL );
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if ( dev == NULL ) {
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if ( sts == SS$_ITEMNOTFOUND ) {
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sts = SS$_NOSUCHDEV;
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}
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} else {
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*retdev = dev;
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sts = SS$_NORMAL;
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}
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return sts;
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}
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