[Glibc-bsd-commits] r3031 - trunk/glibc-ports/kfreebsd
Petr Salinger
ps-guest at alioth.debian.org
Fri Apr 16 11:57:14 UTC 2010
Author: ps-guest
Date: 2010-04-16 11:57:14 +0000 (Fri, 16 Apr 2010)
New Revision: 3031
Added:
trunk/glibc-ports/kfreebsd/dl-origin.c
Log:
handle $ORIGIN in the same way as linux
Added: trunk/glibc-ports/kfreebsd/dl-origin.c
===================================================================
--- trunk/glibc-ports/kfreebsd/dl-origin.c (rev 0)
+++ trunk/glibc-ports/kfreebsd/dl-origin.c 2010-04-16 11:57:14 UTC (rev 3031)
@@ -0,0 +1,80 @@
+/* Find path of executable.
+ Copyright (C) 1998, 1999, 2000, 2002, 2004 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Ulrich Drepper <drepper at cygnus.com>, 1998.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <assert.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/param.h>
+#include <ldsodefs.h>
+#include <sysdep.h>
+
+#include <dl-dst.h>
+
+/* On Linux >= 2.1 systems which have the dcache implementation we can get
+ the path of the application from the /proc/self/exe symlink. Try this
+ first and fall back on the generic method if necessary. */
+
+const char *
+_dl_get_origin (void)
+{
+ char linkval[PATH_MAX];
+ char *result;
+ int len;
+
+ len = readlink("/proc/self/exe", linkval, sizeof (linkval));
+
+ if (len > 0 && linkval[0] != '[')
+ {
+ /* We can use this value. */
+ assert (linkval[0] == '/');
+ while (len > 1 && linkval[len - 1] != '/')
+ --len;
+ result = (char *) malloc (len + 1);
+ if (result == NULL)
+ result = (char *) -1;
+ else if (len == 1)
+ memcpy (result, "/", 2);
+ else
+ *((char *) __mempcpy (result, linkval, len - 1)) = '\0';
+ }
+ else
+ {
+ result = (char *) -1;
+ /* We use the environment variable LD_ORIGIN_PATH. If it is set make
+ a copy and strip out trailing slashes. */
+ if (GLRO(dl_origin_path) != NULL)
+ {
+ size_t len = strlen (GLRO(dl_origin_path));
+ result = (char *) malloc (len + 1);
+ if (result == NULL)
+ result = (char *) -1;
+ else
+ {
+ char *cp = __mempcpy (result, GLRO(dl_origin_path), len);
+ while (cp > result + 1 && cp[-1] == '/')
+ --cp;
+ *cp = '\0';
+ }
+ }
+ }
+
+ return result;
+}
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