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common: Fix gnupg_inotify_has_name.

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* common/sysutils.c (gnupg_inotify_has_name): Take care of the
alignment.

--

Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
This commit is contained in:
NIIBE Yutaka 2016-10-27 10:16:48 +09:00
parent 96414baf36
commit bc28f320fa
1 changed files with 22 additions and 14 deletions
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36
common/sysutils.c
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@ -1037,40 +1037,48 @@ int
gnupg_inotify_has_name (int fd, const char *name) gnupg_inotify_has_name (int fd, const char *name)
{ {
#if USE_NPTH && HAVE_INOTIFY_INIT #if USE_NPTH && HAVE_INOTIFY_INIT
union { #define BUFSIZE_FOR_INOTIFY (sizeof (struct inotify_event) + 255 + 1)
struct inotify_event ev; char buf[BUFSIZE_FOR_INOTIFY];
char _buf[sizeof (struct inotify_event) + 255 + 1]; char *p;
} buf;
struct inotify_event *evp;
int n; int n;
n = npth_read (fd, &buf, sizeof buf); n = npth_read (fd, buf, sizeof buf);
p = buf;
/* log_debug ("notify read: n=%d\n", n); */ /* log_debug ("notify read: n=%d\n", n); */
evp = &buf.ev;
while (n >= sizeof (struct inotify_event)) while (n >= sizeof (struct inotify_event))
{ {
struct inotify_event ev;
const char *ev_name;
memcpy (&ev, p, sizeof (struct inotify_event));
if (ev.len > 255 + 1) /* Something goes wrong, skip this data. */
break;
ev_name = p + sizeof (struct inotify_event);
p += sizeof (struct inotify_event) + ev.len;
n -= sizeof (struct inotify_event) + ev.len;
/* log_debug (" mask=%x len=%u name=(%s)\n", */ /* log_debug (" mask=%x len=%u name=(%s)\n", */
/* evp->mask, (unsigned int)evp->len, evp->len? evp->name:""); */ /* ev.mask, (unsigned int)ev.len, ev.len? ev.name:""); */
if ((evp->mask & IN_UNMOUNT)) if ((ev.mask & IN_UNMOUNT))
{ {
/* log_debug (" found (dir unmounted)\n"); */ /* log_debug (" found (dir unmounted)\n"); */
return 3; /* Directory was unmounted. */ return 3; /* Directory was unmounted. */
} }
if ((evp->mask & IN_DELETE_SELF)) if ((ev.mask & IN_DELETE_SELF))
{ {
/* log_debug (" found (dir removed)\n"); */ /* log_debug (" found (dir removed)\n"); */
return 2; /* Directory was removed. */ return 2; /* Directory was removed. */
} }
if ((evp->mask & IN_DELETE)) if ((ev.mask & IN_DELETE))
{ {
if (evp->len >= strlen (name) && !strcmp (evp->name, name)) if (ev.len >= strlen (name) && !strcmp (ev_name, name))
{ {
/* log_debug (" found (file removed)\n"); */ /* log_debug (" found (file removed)\n"); */
return 1; /* File was removed. */ return 1; /* File was removed. */
} }
} }
n -= sizeof (*evp) + evp->len;
evp = (struct inotify_event *)((char*)evp + sizeof (*evp) + evp->len);
} }
#else /*!(USE_NPTH && HAVE_INOTIFY_INIT)*/ #else /*!(USE_NPTH && HAVE_INOTIFY_INIT)*/