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-rw-r--r--libXau/AuFileName.c159
1 files changed, 87 insertions, 72 deletions
diff --git a/libXau/AuFileName.c b/libXau/AuFileName.c
index 4419070bc..bc7b177db 100644
--- a/libXau/AuFileName.c
+++ b/libXau/AuFileName.c
@@ -1,72 +1,87 @@
-/*
-
-Copyright 1988, 1998 The Open Group
-
-Permission to use, copy, modify, distribute, and sell this software and its
-documentation for any purpose is hereby granted without fee, provided that
-the above copyright notice appear in all copies and that both that
-copyright notice and this permission notice appear in supporting
-documentation.
-
-The above copyright notice and this permission notice shall be included in
-all copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
-AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
-CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-
-Except as contained in this notice, the name of The Open Group shall not be
-used in advertising or otherwise to promote the sale, use or other dealings
-in this Software without prior written authorization from The Open Group.
-
-*/
-
-#ifdef HAVE_CONFIG_H
-#include <config.h>
-#endif
-#include <X11/Xauth.h>
-#include <X11/Xos.h>
-#include <stdlib.h>
-
-char *
-XauFileName (void)
-{
- const char *slashDotXauthority = "/.Xauthority";
- char *name;
- static char *buf;
- static int bsize;
-#ifdef WIN32
- char dir[128];
-#endif
- int size;
-
- if ((name = getenv ("XAUTHORITY")))
- return name;
- name = getenv ("HOME");
- if (!name) {
-#ifdef WIN32
- (void) strcpy (dir, "/users/");
- if ((name = getenv("USERNAME"))) {
- (void) strcat (dir, name);
- name = dir;
- }
- if (!name)
-#endif
- return NULL;
- }
- size = strlen (name) + strlen(&slashDotXauthority[1]) + 2;
- if (size > bsize) {
- if (buf)
- free (buf);
- buf = malloc ((unsigned) size);
- if (!buf)
- return NULL;
- bsize = size;
- }
- strcpy (buf, name);
- strcat (buf, slashDotXauthority + (name[1] == '\0' ? 1 : 0));
- return buf;
-}
+/*
+
+Copyright 1988, 1998 The Open Group
+
+Permission to use, copy, modify, distribute, and sell this software and its
+documentation for any purpose is hereby granted without fee, provided that
+the above copyright notice appear in all copies and that both that
+copyright notice and this permission notice appear in supporting
+documentation.
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+Except as contained in this notice, the name of The Open Group shall not be
+used in advertising or otherwise to promote the sale, use or other dealings
+in this Software without prior written authorization from The Open Group.
+
+*/
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+#include <X11/Xauth.h>
+#include <X11/Xos.h>
+#include <stdlib.h>
+
+static char *buf = NULL;
+
+static void
+free_filename_buffer(void)
+{
+ free(buf);
+ buf = NULL;
+}
+
+char *
+XauFileName (void)
+{
+ const char *slashDotXauthority = "/.Xauthority";
+ char *name;
+ static int bsize;
+ static int atexit_registered = 0;
+#ifdef WIN32
+ char dir[128];
+#endif
+ int size;
+
+ if ((name = getenv ("XAUTHORITY")))
+ return name;
+ name = getenv ("HOME");
+ if (!name) {
+#ifdef WIN32
+ (void) strcpy (dir, "/users/");
+ if ((name = getenv("USERNAME"))) {
+ (void) strcat (dir, name);
+ name = dir;
+ }
+ if (!name)
+#endif
+ return NULL;
+ }
+ size = strlen (name) + strlen(&slashDotXauthority[1]) + 2;
+ if (size > bsize) {
+ if (buf)
+ free (buf);
+ buf = malloc ((unsigned) size);
+ if (!buf)
+ return NULL;
+
+ if (!atexit_registered) {
+ atexit(free_filename_buffer);
+ atexit_registered = 1;
+ }
+
+ bsize = size;
+ }
+ strcpy (buf, name);
+ strcat (buf, slashDotXauthority + (name[1] == '\0' ? 1 : 0));
+ return buf;
+}