int64_t
do_inotify_add_watch (const char *path, int mask)
{
#ifdef HAVE_SYS_INOTIFY_H
int64_t r;
char *buf;
NEED_INOTIFY (-1);
buf = sysroot_path (path);
if (!buf) {
reply_with_perror ("malloc");
return -1;
}
r = inotify_add_watch (inotify_fd, buf, mask);
free (buf);
if (r == -1) {
reply_with_perror ("%s", path);
return -1;
}
return r;
#else
NOT_AVAILABLE (-1);
#endif
}
int
do_inotify_rm_watch (int wd)
{
NEED_INOTIFY (-1);
if (inotify_rm_watch (inotify_fd, wd) == -1) {
reply_with_perror ("%d", wd);
return -1;
}
return 0;
}
int
do_inotify_rm_watch (int wd)
{
#ifdef HAVE_SYS_INOTIFY_H
NEED_INOTIFY (-1);
if (inotify_rm_watch (inotify_fd, wd) == -1) {
reply_with_perror ("%d", wd);
return -1;
}
return 0;
#else
NOT_AVAILABLE (-1);
#endif
}
int
do_inotify_close (void)
{
NEED_INOTIFY (-1);
if (inotify_fd == -1) {
reply_with_error ("handle is not open");
return -1;
}
if (close (inotify_fd) == -1) {
reply_with_perror ("close");
return -1;
}
inotify_fd = -1;
inotify_posn = 0;
return 0;
}
int64_t
do_inotify_add_watch (const char *path, int mask)
{
int64_t r;
CLEANUP_FREE char *buf = NULL;
NEED_INOTIFY (-1);
buf = sysroot_path (path);
if (!buf) {
reply_with_perror ("malloc");
return -1;
}
r = inotify_add_watch (inotify_fd, buf, mask);
if (r == -1) {
reply_with_perror ("%s", path);
return -1;
}
return r;
}
int
do_inotify_close (void)
{
#ifdef HAVE_SYS_INOTIFY_H
NEED_INOTIFY (-1);
if (inotify_fd == -1) {
reply_with_error ("handle is not open");
return -1;
}
if (close (inotify_fd) == -1) {
reply_with_perror ("close");
return -1;
}
inotify_fd = -1;
inotify_posn = 0;
return 0;
#else
NOT_AVAILABLE (-1);
#endif
}
guestfs_int_inotify_event_list *
do_inotify_read (void)
{
int space;
guestfs_int_inotify_event_list *ret;
NEED_INOTIFY (NULL);
ret = malloc (sizeof *ret);
if (ret == NULL) {
reply_with_perror ("malloc");
return NULL;
}
ret->guestfs_int_inotify_event_list_len = 0;
ret->guestfs_int_inotify_event_list_val = NULL;
/* Read events that are available, but make sure we won't exceed
* maximum message size. In order to achieve this we have to
* guesstimate the remaining space available.
*/
space = GUESTFS_MESSAGE_MAX / 2;
while (space > 0) {
struct inotify_event *event;
int r;
size_t n;
r = read (inotify_fd, inotify_buf + inotify_posn,
sizeof (inotify_buf) - inotify_posn);
if (r == -1) {
if (errno == EWOULDBLOCK || errno == EAGAIN) /* End of list. */
break;
reply_with_perror ("read");
goto error;
}
if (r == 0) { /* End of file - we're not expecting it. */
reply_with_error ("unexpected end of file");
goto error;
}
inotify_posn += r;
/* Read complete events from the buffer and add them to the result. */
n = 0;
while (n < inotify_posn) {
guestfs_int_inotify_event *np;
guestfs_int_inotify_event *in;
event = (struct inotify_event *) &inotify_buf[n];
/* Have we got a complete event in the buffer? */
#ifdef __GNUC__
if (n + sizeof (struct inotify_event) > inotify_posn ||
n + sizeof (struct inotify_event) + event->len > inotify_posn)
break;
#else
#error "this code needs fixing so it works on non-GCC compilers"
#endif
/* Check event->len is reasonable (note the field is uint32_t). */
if (event->len > PATH_MAX) {
reply_with_error ("event->len = %" PRIu32 " > PATH_MAX", event->len);
goto error;
}
np = realloc (ret->guestfs_int_inotify_event_list_val,
(ret->guestfs_int_inotify_event_list_len + 1) *
sizeof (guestfs_int_inotify_event));
if (np == NULL) {
reply_with_perror ("realloc");
goto error;
}
ret->guestfs_int_inotify_event_list_val = np;
in = &ret->guestfs_int_inotify_event_list_val[ret->guestfs_int_inotify_event_list_len];
ret->guestfs_int_inotify_event_list_len++;
in->in_wd = event->wd;
in->in_mask = event->mask;
in->in_cookie = event->cookie;
if (event->len > 0)
in->in_name = strdup (event->name);
else
in->in_name = strdup (""); /* Should have optional string fields XXX. */
if (in->in_name == NULL) {
reply_with_perror ("strdup");
goto error;
}
/* Estimate space used by this event in the message. */
space -= 16 + 4 + strlen (in->in_name) + 4;
/* Move pointer to next event. */
#ifdef __GNUC__
n += sizeof (struct inotify_event) + event->len;
#else
#error "this code needs fixing so it works on non-GCC compilers"
#endif
}
/* 'n' now points to the first unprocessed/incomplete
* message in the buffer. Copy that to offset 0 in the buffer.
*/
memmove (inotify_buf, &inotify_buf[n], inotify_posn - n);
inotify_posn -= n;
}
/* Return the messages. */
return ret;
error:
xdr_free ((xdrproc_t) xdr_guestfs_int_inotify_event_list, (char *) ret);
free (ret);
return NULL;
}
