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101a03ee30
Various errors in DEBUG code. List parser for devices and labels used unchecked fixed-size arrays. Make dynamic, and deal with ", " Add some paranoia checks to diskio. Fix memory leak under WIN32. In phynt, write in the right direction (from Larry Baker notes)
125 lines
3.3 KiB
C
125 lines
3.3 KiB
C
/* PHYUNIX.c v1.3 Physical I/O module for Unix */
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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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/*
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If the user mounts cd0 we open up /dev/cd0 for access.
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*/
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#ifndef _FILE_OFFSET_BITS
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#define _FILE_OFFSET_BITS 64
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#endif
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#include <inttypes.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <sys/types.h>
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#include "phyio.h"
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#include "ssdef.h"
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#include "compat.h"
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#if defined(__digital__) && defined(__unix__)
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#define DEV_PREFIX "/devices/rdisk/%s"
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#else
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#ifdef sun
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#define DEV_PREFIX "/dev/dsk/%s"
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#else
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#define DEV_PREFIX "/dev/%s"
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#endif
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#endif
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unsigned init_count = 0;
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unsigned read_count = 0;
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unsigned write_count = 0;
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void phyio_show(void)
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{
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printf("PHYIO_SHOW Initializations: %d Reads: %d Writes: %d\n",
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init_count,read_count,write_count);
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}
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void phyio_help(FILE *fp ) {
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fprintf( fp, "Specify the device to be mounted as using the format:\n" );
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fprintf( fp, " mount %s%s\n\n", DEV_PREFIX, "device" );
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fprintf( fp, "For example, if you are using " DEV_PREFIX "\n", "cdrom0" );
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fprintf( fp, " ODS2$> mount cdrom0\n\n" );
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fprintf( fp, "Use ODS2-Image to work with disk images such as .ISO or simulator files.\n" );
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fprintf( fp, "Alternatively, you can mount the image on a loop device.\n" );
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return;
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}
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unsigned phyio_init(int devlen,char *devnam,unsigned *handle,struct phyio_info *info)
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{
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int vmsfd;
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char *cp,devbuf[200];
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UNUSED(devlen);
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init_count++;
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info->status = 0; /* We don't know anything about this device! */
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info->sectors = 0;
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info->sectorsize = 0;
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snprintf(devbuf,sizeof(devbuf),DEV_PREFIX,devnam);
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cp = strchr(devbuf,':');
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if (cp != NULL) *cp = '\0';
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vmsfd = open(devbuf,O_RDWR);
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if (vmsfd < 0) vmsfd = open(devbuf,O_RDONLY);
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if (vmsfd < 0) return SS$_NOSUCHDEV;
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*handle = vmsfd;
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return SS$_NORMAL;
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}
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unsigned phyio_close(unsigned handle)
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{
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close(handle);
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return SS$_NORMAL;
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}
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unsigned phyio_read(unsigned handle,unsigned block,unsigned length,char *buffer)
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{
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off_t res;
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#ifdef DEBUG
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printf("Phyio read block: %d into %p (%d bytes)\n",block,buffer,length);
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#endif
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read_count++;
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if ((res = lseek(handle,block*512,0)) < 0) {
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perror("lseek ");
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printf("lseek failed %" PRIuMAX "u\n",(uintmax_t)res);
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return SS$_PARITY;
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}
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if ((res = read(handle,buffer,length)) != (ssize_t)length) {
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perror("read ");
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printf("read failed %" PRIuMAX "u\n",(uintmax_t)res);
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return SS$_PARITY;
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}
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return SS$_NORMAL;
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}
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unsigned phyio_write(unsigned handle,unsigned block,unsigned length,char *buffer)
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{
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#ifdef DEBUG
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printf("Phyio write block: %d from %p (%d bytes)\n",block,buffer,length);
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#endif
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write_count++;
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if (lseek(handle,block*512,0) < 0) return SS$_PARITY;
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if (write(handle,buffer,length) != length) return SS$_PARITY;
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return SS$_NORMAL;
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}
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