(k_hasafs_recheck): new function, allow rechecking if AFS client have

started now, internaly it resets the internal state from k_hasafs()
and retry retry the probing. The problem with calling k_hasaf() is
that is plays around with signals, and that cases problem for some
systems/applications.


git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@16199 ec53bebd-3082-4978-b11e-865c3cabbd6b

lib/kafs/afssys.c

@@ -164,11 +164,38 @@ map_syscall_name_to_number (const char *str, int *res)
 static int 
 try_ioctlpath(const char *path, int entrypoint)
 {
-    int fd;
+    int fd, ret, saved_errno;
+
     fd = open(path, O_RDWR);
     if (fd < 0)
 	return 1;
+    switch (entrypoint) {
+    case LINUX_PROC_POINT: {
+	struct procdata data = { 0, 0, 0, 0, AFSCALL_PIOCTL };
+	data.param2 = (unsigned long)VIOCGETTOK;
+	ret = ioctl(fd, VIOC_SYSCALL_PROC, &data);
+	break;
+    }
+    case MACOS_DEV_POINT: {
+	struct devdata data = { AFSCALL_PIOCTL, 0, 0, 0, 0, 0, 0, 0 };
+	data.param2 = (unsigned long)VIOCGETTOK;
+	ret = ioctl(fd, VIOC_SYSCALL_DEV, &data);
+	break;
+    }
+    default:
+	abort();
+    }
+    saved_errno = errno;
     close(fd);
+    /* 
+     * Be quite liberal in what error are ok, the first is the one
+     * that should trigger given that params is NULL.
+     */
+    if (ret && 
+	(saved_errno != EFAULT &&
+	 saved_errno != EDOM && 
+	 saved_errno != ENOTCONN))
+	return 1;
     afs_ioctlpath = strdup(path);
     if (afs_ioctlpath == NULL)
 	return 1;
@@ -545,3 +572,10 @@ done:
     errno = saved_errno;
     return afs_entry_point != NO_ENTRY_POINT;
 }
+
+int
+k_hasafs_recheck(void)
+{
+    afs_entry_point = UNKNOWN_ENTRY_POINT;
+    return k_hasafs();
+}