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path: root/erts/emulator/drivers/common/efile_drv.c
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Diffstat (limited to 'erts/emulator/drivers/common/efile_drv.c')
-rw-r--r--erts/emulator/drivers/common/efile_drv.c244
1 files changed, 145 insertions, 99 deletions
diff --git a/erts/emulator/drivers/common/efile_drv.c b/erts/emulator/drivers/common/efile_drv.c
index 5aa5f60d0f..ac73897cf2 100644
--- a/erts/emulator/drivers/common/efile_drv.c
+++ b/erts/emulator/drivers/common/efile_drv.c
@@ -111,11 +111,11 @@ void erl_exit(int n, char *fmt, ...);
static ErlDrvSysInfo sys_info;
-/*#define TRACE 1*/
+/* #define TRACE 1 */
#ifdef TRACE
-# define TRACE_C(c) (putchar(c))
-# define TRACE_S(s) (fputs((s), stdout))
-# define TRACE_F(args) (printf args)
+# define TRACE_C(c) do { putchar(c); fflush(stdout); } while (0)
+# define TRACE_S(s) do { fputs((s), stdout); fflush(stdout); } while (0)
+# define TRACE_F(args) do { printf args ;fflush(stdout); } while (0)
#else
# define TRACE_C(c) ((void)(0))
# define TRACE_S(s) ((void)(0))
@@ -139,24 +139,54 @@ static ErlDrvSysInfo sys_info;
#define MUTEX_UNLOCK(m)
#endif
-
-
#if 0
/* Experimental, for forcing all file operations to use the same thread. */
-static unsigned file_fixed_key = 1;
-#define KEY(desc) (&file_fixed_key)
+ static unsigned file_fixed_key = 1;
+# define KEY(desc) (&file_fixed_key)
#else
-#define KEY(desc) (&(desc)->key)
+# define KEY(desc) (&(desc)->key)
#endif
+#ifdef FILENAMES_16BIT
+# define FILENAME_BYTELEN(Str) filename_len_16bit(Str)
+# define FILENAME_COPY(To,From) filename_cpy_16bit((To),(From))
+# define FILENAME_CHARSIZE 2
+
+ static int filename_len_16bit(char *str)
+ {
+ char *p = str;
+ while(*p != '\0' || p[1] != '\0') {
+ p += 2;
+ }
+ return (p - str);
+ }
+
+ static void filename_cpy_16bit(char *to, char *from)
+ {
+ while(*from != '\0' || from[1] != '\0') {
+ *to++ = *from++;
+ *to++ = *from++;
+ }
+ *to++ = *from++;
+ *to++ = *from++;
+ }
+
+#else
+# define FILENAME_BYTELEN(Str) strlen(Str)
+# define FILENAME_COPY(To,From) strcpy(To,From)
+# define FILENAME_CHARSIZE 1
+#endif
-#if MAXPATHLEN >= BUFSIZ
-#define RESBUFSIZE MAXPATHLEN+1
+#if (MAXPATHLEN+1)*FILENAME_CHARSIZE+1 > BUFSIZ
+# define RESBUFSIZE ((MAXPATHLEN+1)*FILENAME_CHARSIZE+1)
#else
-#define RESBUFSIZE BUFSIZ
+# define RESBUFSIZE BUFSIZ
#endif
+
+
+
#define GET_TIME(i, b) \
(i).year = get_int32((b) + 0 * 4); \
(i).month = get_int32((b) + 1 * 4); \
@@ -288,9 +318,9 @@ struct t_preadv {
};
#define READDIR_BUFSIZE (8*1024)
-#if READDIR_BUFSIZE < (2*MAXPATHLEN)
-#undef READDIR_BUFSIZE
-#define READDIR_BUFSIZE (2*MAXPATHLEN)
+#if READDIR_BUFSIZE < (FILENAME_CHARSIZE*2*(MAXPATHLEN+1))
+# undef READDIR_BUFSIZE
+# define READDIR_BUFSIZE (FILENAME_CHARSIZE*2*(MAXPATHLEN+1))
#endif
struct t_readdir_buf {
@@ -371,6 +401,7 @@ struct t_data
};
+
#define EF_ALLOC(S) driver_alloc((S))
#define EF_REALLOC(P, S) driver_realloc((P), (S))
#define EF_SAFE_ALLOC(S) ef_safe_alloc((S))
@@ -1290,7 +1321,7 @@ static void invoke_writev(void *data) {
p < size && iovcnt < iovlen;
p += iov0[iovcnt++].iov_len)
;
- iov = EF_ALLOC(sizeof(SysIOVec)*iovcnt);
+ iov = EF_SAFE_ALLOC(sizeof(SysIOVec)*iovcnt);
memcpy(iov,iov0,iovcnt*sizeof(SysIOVec));
MUTEX_UNLOCK(d->c.writev.q_mtx);
/* Let go of lock until we deque from original vector */
@@ -1407,7 +1438,7 @@ static void invoke_pwritev(void *data) {
/* Lock the queue just for a while, we don't want it locked during write */
MUTEX_LOCK(c->q_mtx);
iov0 = driver_peekq(c->port, &iovlen);
- iov = EF_ALLOC(sizeof(SysIOVec)*iovlen);
+ iov = EF_SAFE_ALLOC(sizeof(SysIOVec)*iovlen);
memcpy(iov,iov0,sizeof(SysIOVec)*iovlen);
MUTEX_UNLOCK(c->q_mtx);
@@ -1501,7 +1532,7 @@ static void invoke_link(void *data)
char *new_name;
d->again = 0;
- new_name = name+strlen(name)+1;
+ new_name = name+FILENAME_BYTELEN(name)+FILENAME_CHARSIZE;
d->result_ok = efile_link(&d->errInfo, name, new_name);
}
@@ -1512,7 +1543,7 @@ static void invoke_symlink(void *data)
char *new_name;
d->again = 0;
- new_name = name+strlen(name)+1;
+ new_name = name+FILENAME_BYTELEN(name)+FILENAME_CHARSIZE;
d->result_ok = efile_symlink(&d->errInfo, name, new_name);
}
@@ -1523,7 +1554,7 @@ static void invoke_rename(void *data)
char *new_name;
d->again = 0;
- new_name = name+strlen(name)+1;
+ new_name = name+FILENAME_BYTELEN(name)+FILENAME_CHARSIZE;
d->result_ok = efile_rename(&d->errInfo, name, new_name);
}
@@ -1571,13 +1602,15 @@ static void invoke_readdir(void *data)
int s;
char *p = NULL;
int buf_sz = 0;
+ size_t tmp_bs;
d->again = 0;
d->errInfo.posix_errno = 0;
while (1) {
char *str;
- if (buf_sz < (4 /* sz */ + 1 /* cmd */ + MAXPATHLEN + 1 /* '\0' */)) {
+ if (buf_sz < (4 /* sz */ + 1 /* cmd */ +
+ FILENAME_CHARSIZE*(MAXPATHLEN + 1))) {
struct t_readdir_buf *b;
if (p) {
put_int32(0, p); /* EOB */
@@ -1597,14 +1630,14 @@ static void invoke_readdir(void *data)
buf_sz -= 4 + 1;
str = p + 4 + 1;
ASSERT(buf_sz >= MAXPATHLEN + 1);
- s = efile_readdir(&d->errInfo, d->b, &d->dir_handle, str, buf_sz);
+ tmp_bs = buf_sz;
+ s = efile_readdir(&d->errInfo, d->b, &d->dir_handle, str, &tmp_bs);
if (s) {
- int str_sz = strlen(str);
- int sz = str_sz + 1;
- put_int32(sz, p);
- p += 4 + sz;
- buf_sz -= str_sz;
+ put_int32(tmp_bs + 1 /* 1 byte for opcode */, p);
+ p += 4 + tmp_bs + 1;
+ ASSERT(p == (str + tmp_bs));
+ buf_sz -= tmp_bs;
}
else {
put_int32(1, p);
@@ -1971,7 +2004,7 @@ file_async_ready(ErlDrvData e, ErlDrvThreadData data)
reply_error(desc, &d->errInfo);
else {
resbuf[0] = FILE_RESP_FNAME;
- length = 1+strlen((char*) resbuf+1);
+ length = 1+FILENAME_BYTELEN((char*) resbuf+1);
TRACE_C('R');
driver_output2(desc->port, resbuf, 1, resbuf+1, length-1);
}
@@ -2033,13 +2066,18 @@ file_async_ready(ErlDrvData e, ErlDrvThreadData data)
int sz = get_int32(p);
while (sz) { /* 0 == EOB */
p += 4;
- driver_output2(desc->port, p, 1, p+1, sz-1);
+ if (sz - 1 > 0) {
+ driver_output2(desc->port, p, 1, p+1, sz-1);
+ } else {
+ driver_output2(desc->port, p, 1, NULL, 0);
+ }
p += sz;
sz = get_int32(p);
}
b1 = b1->next;
EF_FREE(b2);
}
+
d->c.read_dir.first_buf = NULL;
d->c.read_dir.last_buf = NULL;
}
@@ -2115,9 +2153,9 @@ file_output(ErlDrvData e, char* buf, int count)
case FILE_MKDIR:
{
- d = EF_SAFE_ALLOC(sizeof(struct t_data) - 1 + strlen(name) + 1);
+ d = EF_SAFE_ALLOC(sizeof(struct t_data) - 1 + FILENAME_BYTELEN(name) + FILENAME_CHARSIZE);
- strcpy(d->b, name);
+ FILENAME_COPY(d->b, name);
d->command = command;
d->invoke = invoke_mkdir;
d->free = free_data;
@@ -2126,9 +2164,9 @@ file_output(ErlDrvData e, char* buf, int count)
}
case FILE_RMDIR:
{
- d = EF_SAFE_ALLOC(sizeof(struct t_data) - 1 + strlen(name) + 1);
+ d = EF_SAFE_ALLOC(sizeof(struct t_data) - 1 + FILENAME_BYTELEN(name) + FILENAME_CHARSIZE);
- strcpy(d->b, name);
+ FILENAME_COPY(d->b, name);
d->command = command;
d->invoke = invoke_rmdir;
d->free = free_data;
@@ -2137,9 +2175,9 @@ file_output(ErlDrvData e, char* buf, int count)
}
case FILE_DELETE:
{
- d = EF_SAFE_ALLOC(sizeof(struct t_data) - 1 + strlen(name) + 1);
+ d = EF_SAFE_ALLOC(sizeof(struct t_data) - 1 + FILENAME_BYTELEN(name) + FILENAME_CHARSIZE);
- strcpy(d->b, name);
+ FILENAME_COPY(d->b, name);
d->command = command;
d->invoke = invoke_delete_file;
d->free = free_data;
@@ -2149,14 +2187,14 @@ file_output(ErlDrvData e, char* buf, int count)
case FILE_RENAME:
{
char* new_name;
-
- new_name = name+strlen(name)+1;
+ int namelen = FILENAME_BYTELEN(name)+FILENAME_CHARSIZE;
+ new_name = name+namelen;
d = EF_SAFE_ALLOC(sizeof(struct t_data) - 1
- + strlen(name) + 1
- + strlen(new_name) + 1);
+ + namelen
+ + FILENAME_BYTELEN(new_name) + FILENAME_CHARSIZE);
- strcpy(d->b, name);
- strcpy(d->b + strlen(name) + 1, new_name);
+ FILENAME_COPY(d->b, name);
+ FILENAME_COPY(d->b + namelen, new_name);
d->flags = desc->flags;
d->fd = fd;
d->command = command;
@@ -2167,9 +2205,9 @@ file_output(ErlDrvData e, char* buf, int count)
}
case FILE_CHDIR:
{
- d = EF_SAFE_ALLOC(sizeof(struct t_data) - 1 + strlen(name) + 1);
+ d = EF_SAFE_ALLOC(sizeof(struct t_data) - 1 + FILENAME_BYTELEN(name) + FILENAME_CHARSIZE);
- strcpy(d->b, name);
+ FILENAME_COPY(d->b, name);
d->command = command;
d->invoke = invoke_chdir;
d->free = free_data;
@@ -2192,9 +2230,10 @@ file_output(ErlDrvData e, char* buf, int count)
#ifdef USE_THREADS
if (sys_info.async_threads > 0)
{
- d = EF_SAFE_ALLOC(sizeof(struct t_data) - 1 + strlen(name) + 1);
+ d = EF_SAFE_ALLOC(sizeof(struct t_data) - 1 + FILENAME_BYTELEN(name) +
+ FILENAME_CHARSIZE);
- strcpy(d->b, name);
+ FILENAME_COPY(d->b, name);
d->dir_handle = NULL;
d->command = command;
d->invoke = invoke_readdir;
@@ -2207,17 +2246,19 @@ file_output(ErlDrvData e, char* buf, int count)
else
#endif
{
+ size_t resbufsize;
char resbuf[RESBUFSIZE+1];
EFILE_DIR_HANDLE dir_handle; /* Handle to open directory. */
errInfo.posix_errno = 0;
dir_handle = NULL;
resbuf[0] = FILE_RESP_FNAME;
+ resbufsize = RESBUFSIZE;
while (efile_readdir(&errInfo, name, &dir_handle,
- resbuf+1, RESBUFSIZE)) {
- int length = strlen(resbuf+1);
- driver_output2(desc->port, resbuf, 1, resbuf+1, length);
+ resbuf+1, &resbufsize)) {
+ driver_output2(desc->port, resbuf, 1, resbuf+1, resbufsize);
+ resbufsize = RESBUFSIZE;
}
if (errInfo.posix_errno != 0) {
reply_error(desc, &errInfo);
@@ -2229,11 +2270,12 @@ file_output(ErlDrvData e, char* buf, int count)
}
case FILE_OPEN:
{
- d = EF_SAFE_ALLOC(sizeof(struct t_data) - 1 + strlen(buf+4) + 1);
+ d = EF_SAFE_ALLOC(sizeof(struct t_data) - 1 + FILENAME_BYTELEN(buf+4) +
+ FILENAME_CHARSIZE);
d->flags = get_int32((uchar*)buf);
name = buf+4;
- strcpy(d->b, name);
+ FILENAME_COPY(d->b, name);
d->command = command;
d->invoke = invoke_open;
d->free = free_data;
@@ -2242,44 +2284,45 @@ file_output(ErlDrvData e, char* buf, int count)
}
case FILE_FDATASYNC:
- {
+ {
d = EF_SAFE_ALLOC(sizeof(struct t_data));
-
+
d->fd = fd;
d->command = command;
d->invoke = invoke_fdatasync;
d->free = free_data;
d->level = 2;
goto done;
- }
+ }
case FILE_FSYNC:
- {
- d = EF_SAFE_ALLOC(sizeof(struct t_data));
-
- d->fd = fd;
- d->command = command;
- d->invoke = invoke_fsync;
- d->free = free_data;
- d->level = 2;
- goto done;
- }
+ {
+ d = EF_SAFE_ALLOC(sizeof(struct t_data));
+
+ d->fd = fd;
+ d->command = command;
+ d->invoke = invoke_fsync;
+ d->free = free_data;
+ d->level = 2;
+ goto done;
+ }
case FILE_FSTAT:
case FILE_LSTAT:
- {
- d = EF_SAFE_ALLOC(sizeof(struct t_data) - 1 + strlen(name) + 1);
+ {
+ d = EF_SAFE_ALLOC(sizeof(struct t_data) - 1 + FILENAME_BYTELEN(name) +
+ FILENAME_CHARSIZE);
+
+ FILENAME_COPY(d->b, name);
+ d->fd = fd;
+ d->command = command;
+ d->invoke = invoke_flstat;
+ d->free = free_data;
+ d->level = 2;
+ goto done;
+ }
- strcpy(d->b, name);
- d->fd = fd;
- d->command = command;
- d->invoke = invoke_flstat;
- d->free = free_data;
- d->level = 2;
- goto done;
- }
-
case FILE_TRUNCATE:
{
d = EF_SAFE_ALLOC(sizeof(struct t_data));
@@ -2296,7 +2339,7 @@ file_output(ErlDrvData e, char* buf, int count)
case FILE_WRITE_INFO:
{
d = EF_SAFE_ALLOC(sizeof(struct t_data) - 1
- + strlen(buf+21*4) + 1);
+ + FILENAME_BYTELEN(buf+21*4) + FILENAME_CHARSIZE);
d->info.mode = get_int32(buf + 0 * 4);
d->info.uid = get_int32(buf + 1 * 4);
@@ -2304,7 +2347,7 @@ file_output(ErlDrvData e, char* buf, int count)
GET_TIME(d->info.accessTime, buf + 3 * 4);
GET_TIME(d->info.modifyTime, buf + 9 * 4);
GET_TIME(d->info.cTime, buf + 15 * 4);
- strcpy(d->b, buf+21*4);
+ FILENAME_COPY(d->b, buf+21*4);
d->command = command;
d->invoke = invoke_write_info;
d->free = free_data;
@@ -2316,7 +2359,7 @@ file_output(ErlDrvData e, char* buf, int count)
{
d = EF_SAFE_ALLOC(sizeof(struct t_data) - 1 + RESBUFSIZE + 1);
- strcpy(d->b, name);
+ FILENAME_COPY(d->b, name);
d->command = command;
d->invoke = invoke_readlink;
d->free = free_data;
@@ -2325,28 +2368,29 @@ file_output(ErlDrvData e, char* buf, int count)
}
case FILE_ALTNAME:
- {
- d = EF_SAFE_ALLOC(sizeof(struct t_data) - 1 + RESBUFSIZE + 1);
- strcpy(d->b, name);
- d->command = command;
- d->invoke = invoke_altname;
- d->free = free_data;
- d->level = 2;
- goto done;
- }
+ {
+ d = EF_SAFE_ALLOC(sizeof(struct t_data) - 1 + RESBUFSIZE + 1);
+ FILENAME_COPY(d->b, name);
+ d->command = command;
+ d->invoke = invoke_altname;
+ d->free = free_data;
+ d->level = 2;
+ goto done;
+ }
case FILE_LINK:
{
char* new_name;
+ int namelen = FILENAME_BYTELEN(name) + FILENAME_CHARSIZE;
- new_name = name+strlen(name)+1;
+ new_name = name+namelen;
d = EF_SAFE_ALLOC(sizeof(struct t_data) - 1
- + strlen(name) + 1
- + strlen(new_name) + 1);
+ + namelen
+ + FILENAME_BYTELEN(new_name) + FILENAME_CHARSIZE);
- strcpy(d->b, name);
- strcpy(d->b + strlen(name) + 1, new_name);
+ FILENAME_COPY(d->b, name);
+ FILENAME_COPY(d->b + namelen, new_name);
d->flags = desc->flags;
d->fd = fd;
d->command = command;
@@ -2359,14 +2403,15 @@ file_output(ErlDrvData e, char* buf, int count)
case FILE_SYMLINK:
{
char* new_name;
+ int namelen = FILENAME_BYTELEN(name) + FILENAME_CHARSIZE;
- new_name = name+strlen(name)+1;
+ new_name = name+namelen;
d = EF_SAFE_ALLOC(sizeof(struct t_data) - 1
- + strlen(name) + 1
- + strlen(new_name) + 1);
+ + namelen
+ + FILENAME_BYTELEN(new_name) + FILENAME_CHARSIZE);
- strcpy(d->b, name);
- strcpy(d->b + strlen(name) + 1, new_name);
+ FILENAME_COPY(d->b, name);
+ FILENAME_COPY(d->b + namelen, new_name);
d->flags = desc->flags;
d->fd = fd;
d->command = command;
@@ -3006,6 +3051,7 @@ file_outputv(ErlDrvData e, ErlIOVec *ev) {
case FILE_READ_FILE: {
struct t_data *d;
+ char *filename;
if (ev->size < 1+1) {
/* Buffer contains empty name */
reply_posix_error(desc, ENOENT);
@@ -3016,7 +3062,8 @@ file_outputv(ErlDrvData e, ErlIOVec *ev) {
reply_posix_error(desc, EINVAL);
goto done;
}
- d = EF_ALLOC(sizeof(struct t_data) + ev->size);
+ filename = EV_CHAR_P(ev, p, q);
+ d = EF_ALLOC(sizeof(struct t_data) -1 + FILENAME_BYTELEN(filename) + FILENAME_CHARSIZE);
if (! d) {
reply_posix_error(desc, ENOMEM);
goto done;
@@ -3024,8 +3071,7 @@ file_outputv(ErlDrvData e, ErlIOVec *ev) {
d->command = command;
d->reply = !0;
/* Copy name */
- memcpy(d->c.read_file.name, EV_CHAR_P(ev, p, q), ev->size-1);
- d->c.read_file.name[ev->size-1] = '\0';
+ FILENAME_COPY(d->c.read_file.name, filename);
d->c.read_file.binp = NULL;
d->invoke = invoke_read_file;
d->free = free_read_file;
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-13 13:41:37 +0000