From 156ee39478bd361111d80ae349ecadab04fa5afb Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Love=20H=C3=B6rnquist=20=C3=85strand?= <lha@kth.se>
Date: Thu, 20 Oct 2005 14:52:18 +0000
Subject: [PATCH] (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 | 36 +++++++++++++++++++++++++++++++++++-
 1 file changed, 35 insertions(+), 1 deletion(-)

diff --git a/lib/kafs/afssys.c b/lib/kafs/afssys.c
index 9b1e85a98..d3a6dab31 100644
--- a/lib/kafs/afssys.c
+++ b/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();
+}