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-rw-r--r--commands/memcmp.c16
1 files changed, 8 insertions, 8 deletions
diff --git a/commands/memcmp.c b/commands/memcmp.c
index 981c8cb..48957b4 100644
--- a/commands/memcmp.c
+++ b/commands/memcmp.c
@@ -34,8 +34,6 @@
#include <linux/stat.h>
#include <xfuncs.h>
-extern char *mem_rw_buf;
-
static char *devmem = "/dev/mem";
static int do_memcmp(int argc, char *argv[])
@@ -45,7 +43,7 @@ static int do_memcmp(int argc, char *argv[])
char *sourcefile = devmem;
char *destfile = devmem;
int sourcefd, destfd;
- char *rw_buf1;
+ char *buf, *source_data, *dest_data;
int ret = 1;
int offset = 0;
struct stat statbuf;
@@ -84,20 +82,22 @@ static int do_memcmp(int argc, char *argv[])
return 1;
}
- rw_buf1 = xmalloc(RW_BUF_SIZE);
+ buf = xmalloc(RW_BUF_SIZE + RW_BUF_SIZE);
+ source_data = buf;
+ dest_data = buf + RW_BUF_SIZE;
while (count > 0) {
int now, r1, r2, i;
now = min((loff_t)RW_BUF_SIZE, count);
- r1 = read_full(sourcefd, mem_rw_buf, now);
+ r1 = read_full(sourcefd, source_data, now);
if (r1 < 0) {
perror("read");
goto out;
}
- r2 = read_full(destfd, rw_buf1, now);
+ r2 = read_full(destfd, dest_data, now);
if (r2 < 0) {
perror("read");
goto out;
@@ -109,7 +109,7 @@ static int do_memcmp(int argc, char *argv[])
}
for (i = 0; i < now; i++) {
- if (mem_rw_buf[i] != rw_buf1[i]) {
+ if (source_data[i] != dest_data[i]) {
printf("files differ at offset %d\n", offset);
goto out;
}
@@ -124,7 +124,7 @@ static int do_memcmp(int argc, char *argv[])
out:
close(sourcefd);
close(destfd);
- free(rw_buf1);
+ free(buf);
return ret;
}