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