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authorBjörn-Egil Dahlberg <[email protected]>2011-06-08 20:32:53 +0200
committerBjörn-Egil Dahlberg <[email protected]>2011-06-08 20:34:00 +0200
commita068de03751686d2eafdf754d643b8e945b6ba15 (patch)
treef570fef6c5ca1833c30cd99078cd8483df2b82bf /erts/emulator/drivers
parent3a975c8778ca5684596f0247e225544d0a96617e (diff)
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Fix boundry error where files might get lost
Diffstat (limited to 'erts/emulator/drivers')
-rw-r--r--erts/emulator/drivers/common/efile_drv.c34
1 files changed, 21 insertions, 13 deletions
diff --git a/erts/emulator/drivers/common/efile_drv.c b/erts/emulator/drivers/common/efile_drv.c
index 3c9007311f..68987b3493 100644
--- a/erts/emulator/drivers/common/efile_drv.c
+++ b/erts/emulator/drivers/common/efile_drv.c
@@ -1627,12 +1627,15 @@ static void invoke_readdir(void *data)
p[0] = FILE_RESP_LFNAME;
file_bs = READDIR_BUFSIZE - n;
- while ( (res = efile_readdir(&d->errInfo, d->b, &d->dir_handle, p + n + 2, &file_bs))
- && ((total - n - 2) >= MAXPATHLEN*FILENAME_CHARSIZE)) {
- put_int16((Uint16)file_bs, p + n);
- n += 2 + file_bs;
- file_bs = READDIR_BUFSIZE - n;
- }
+ do {
+ res = efile_readdir(&d->errInfo, d->b, &d->dir_handle, p + n + 2, &file_bs);
+
+ if (res) {
+ put_int16((Uint16)file_bs, p + n);
+ n += 2 + file_bs;
+ file_bs = READDIR_BUFSIZE - n;
+ }
+ } while( res && ((total - n - 2) >= MAXPATHLEN*FILENAME_CHARSIZE));
b->n = n;
} while(res);
@@ -2112,6 +2115,7 @@ file_async_ready(ErlDrvData e, ErlDrvThreadData data)
cq_execute(desc);
}
+
/*********************************************************************
* Driver entry point -> output
*/
@@ -2256,15 +2260,19 @@ file_output(ErlDrvData e, char* buf, int count)
do {
n = 1;
resbufsize = READDIR_BUFSIZE - n;
- while ( (res = efile_readdir(&errInfo, name, &dir_handle, resbuf + n + 2, &resbufsize))
- && ((total - n - 2) >= MAXPATHLEN*FILENAME_CHARSIZE)) {
- put_int16((Uint16)resbufsize, resbuf + n);
- n += 2 + resbufsize;
- resbufsize = READDIR_BUFSIZE - n;
- }
+
+ do {
+ res = efile_readdir(&errInfo, name, &dir_handle, resbuf + n + 2, &resbufsize);
+
+ if (res) {
+ put_int16((Uint16)resbufsize, resbuf + n);
+ n += 2 + resbufsize;
+ resbufsize = READDIR_BUFSIZE - n;
+ }
+ } while( res && ((total - n - 2) >= MAXPATHLEN*FILENAME_CHARSIZE));
if (n > 1) {
- driver_output2(desc->port, resbuf, 1, resbuf+1, n - 1);
+ driver_output2(desc->port, resbuf, 1, resbuf + 1, n - 1);
}
} while(res);