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tools: add "blkdown" tool

Browse Source 
When developing from a Collapse OS environment, it's necessary to
be able to download blocks from it.
This commit is contained in:
Virgil Dupras 2020-12-21 16:55:36 -05:00
parent 45fbce4eb9
commit 8992cdbbf6
2 changed files with 63 additions and 1 deletions
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4
tools/Makefile
View File

@ -6,9 +6,10 @@ EXEC_TGT = exec
BLKPACK_TGT = blkpack BLKPACK_TGT = blkpack
BLKUNPACK_TGT = blkunpack BLKUNPACK_TGT = blkunpack
BLKUP_TGT = blkup BLKUP_TGT = blkup
BLKDOWN_TGT = blkdown
TARGETS = $(MEMDUMP_TGT) $(UPLOAD_TGT) \ TARGETS = $(MEMDUMP_TGT) $(UPLOAD_TGT) \
$(TTYSAFE_TGT) $(PINGPONG_TGT) $(EXEC_TGT) $(BLKPACK_TGT) \ $(TTYSAFE_TGT) $(PINGPONG_TGT) $(EXEC_TGT) $(BLKPACK_TGT) \
$(BLKUNPACK_TGT) $(BLKUP_TGT) $(BLKUNPACK_TGT) $(BLKUP_TGT) $(BLKDOWN_TGT)
OBJS = common.o OBJS = common.o
all: $(TARGETS) all: $(TARGETS)
@ -25,6 +26,7 @@ $(EXEC_TGT): $(EXEC_TGT).c
$(BLKPACK_TGT): $(BLKPACK_TGT).c $(BLKPACK_TGT): $(BLKPACK_TGT).c
$(BLKUNPACK_TGT): $(BLKUNPACK_TGT).c $(BLKUNPACK_TGT): $(BLKUNPACK_TGT).c
$(BLKUP_TGT): $(BLKUP_TGT).c $(BLKUP_TGT): $(BLKUP_TGT).c
$(BLKDOWN_TGT): $(BLKDOWN_TGT).c
$(TARGETS): $(OBJS) $(TARGETS): $(OBJS)
$(CC) $(CFLAGS) $@.c $(OBJS) -o $@ $(CC) $(CFLAGS) $@.c $(OBJS) -o $@

60
tools/blkdown.c Normal file
View File

@ -0,0 +1,60 @@
#include <stdlib.h>
#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>
#include <string.h>
#include "common.h"
/* Pull specified block no "srcblk" from "device" into block no "dstblk" in
* local "blkfs". If "dstblk" is omitted, it is the same as "srcblk"
*/
int main(int argc, char **argv)
{
if ((argc != 5) && (argc != 4)) {
fprintf(stderr, "Usage: ./blkdown device srcblk blkfs [dstblk]\n");
return 1;
}
unsigned int srcblk = strtol(argv[2], NULL, 10);
unsigned int dstblk = srcblk;
if (argc == 5) {
dstblk = strtol(argv[4], NULL, 10);
}
FILE *fp = fopen(argv[3], "r+");
if (!fp) {
fprintf(stderr, "Can't open %s.\n", argv[3]);
return 1;
}
int fd = ttyopen(argv[1]);
if (fd < 0) {
fprintf(stderr, "Could not open %s\n", argv[1]);
return 1;
}
fseek(fp, 1024 * dstblk, SEEK_SET);
char s[0x40];
sprintf(s, ": _ %d BLK@ 1024 0 DO I BLK( + C@ .x LOOP ; _", srcblk);
sendcmd(fd, s);
int returncode = 0;
for (int i=0; i<1024; i++) {
usleep(1000); // let it breathe
mread(fd, s, 2); // read hex pair
s[2] = 0; // null terminate
char *endptr = NULL;
unsigned char c = strtol(s, &endptr, 16);
if (endptr != &s[2]) {
fprintf(stderr, "Non-hex value (%s) at index %d.\n", s, i);
// we don't exit now because we need to "consume" our whole program.
returncode = 1;
}
if (returncode == 0) {
fwrite(&c, 1, 1, fp);
}
}
readprompt(fd);
sendcmdp(fd, "FORGET _");
printf("Done!\n");
fclose(fp);
return returncode;
}