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-rw-r--r--elf/dl-origin.c51
1 files changed, 51 insertions, 0 deletions
diff --git a/elf/dl-origin.c b/elf/dl-origin.c
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index 0000000..8761937
--- /dev/null
+++ b/elf/dl-origin.c
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+/* 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@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 <stdlib.h>
+#include <string.h>
+#include <sys/param.h>
+#include <ldsodefs.h>
+
+#include <dl-dst.h>
+
+
+const char *
+_dl_get_origin (void)
+{
+ char *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;
+}