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dos33: add utility for manipulating raw sectors

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This commit is contained in:
Vince Weaver 2020-08-20 12:50:46 -04:00
parent ba46a0de4d
commit feea160820
2 changed files with 90 additions and 2 deletions
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17
dos33fs-utils/Makefile
View File

@ -1,6 +1,7 @@
include ../Makefile.inc
all: dos33 mkdos33fs make_b \
dos33_raw \
dos33_text2ascii char2hex
@ -10,12 +11,24 @@ char2hex: char2hex.o
char2hex.o: char2hex.c
$(CC) $(CFLAGS) -c char2hex.c
###
dos33: dos33.o
$(CC) $(LFLAGS) -o dos33 dos33.o
dos33.o: dos33.c dos33.h
$(CC) $(CFLAGS) -g -c dos33.c
###
dos33_raw: dos33_raw.o
$(CC) $(LFLAGS) -o dos33_raw dos33_raw.o
dos33_raw.o: dos33_raw.c
$(CC) $(CFLAGS) -g -c dos33_raw.c
###
dos33_text2ascii: dos33_text2ascii.o
$(CC) $(LFLGAS) -o dos33_text2ascii dos33_text2ascii.o
@ -36,8 +49,8 @@ mkdos33fs.o: mkdos33fs.c dos33.h
install:
cp dos33 mkdos33fs make_b dos33_text2ascii char2hex $(INSTALL_LOC)
cp dos33 dos33_raw mkdos33fs make_b dos33_text2ascii char2hex $(INSTALL_LOC)
clean:
rm -f *~ *.o dos33 mkdos33fs make_b dos33_text2ascii char2hex
rm -f *~ *.o dos33 dos33_raw mkdos33fs make_b dos33_text2ascii char2hex
cd tests && make clean

75
dos33fs-utils/dos33_raw.c Normal file
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@ -0,0 +1,75 @@
#include <stdio.h>
#include <errno.h>
#include <stdlib.h>
#include <fcntl.h>
#include <string.h>
#include <unistd.h>
/* usage: dos33_raw track sector file */
static void usage(char *exe_name) {
printf("Usage:\n");
printf("\t%s disk_image track sector file\n\n",exe_name);
exit(1);
}
int main(int argc, char **argv) {
unsigned int track,sector;
int disk_image_fd;
int file_fd;
unsigned char buffer[256];
int result;
if (argc<4) {
usage(argv[0]);
}
track=atoi(argv[2]);
sector=atoi(argv[3]);
if (track>34) {
fprintf(stderr,"Warning! Unusual track number %d\n",track);
}
if (track>15) {
fprintf(stderr,"Warning! Unusual sector number %d\n",sector);
}
disk_image_fd=open(argv[1],O_RDWR);
if (disk_image_fd<0) {
fprintf(stderr,"Error opening %s: %s\n",
argv[1],strerror(errno));
exit(1);
}
file_fd=open(argv[4],O_RDONLY);
if (file_fd<0) {
fprintf(stderr,"Error opening %s: %s\n",
argv[4],strerror(errno));
exit(1);
}
result=lseek(disk_image_fd,(sector*256)+(track*16*256),SEEK_SET);
if (result<0) {
fprintf(stderr,"Error seeking: %s\n",strerror(errno));
exit(1);
}
/* write until out of space */
while(1) {
result=read(file_fd,buffer,256);
if (result<0) break;
result=write(disk_image_fd,buffer,result);
if (result<0) {
fprintf(stderr,"Error writing image: %s\n",
strerror(errno));
break;
}
}
close(file_fd);
close(disk_image_fd);
return 0;
}