mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-23 05:20:06 +00:00
581c785bf3
I used these shell commands: ../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright (cd ../glibc && git commit -am"[this commit message]") and then ignored the output, which consisted lines saying "FOO: warning: copyright statement not found" for each of 7061 files FOO. I then removed trailing white space from math/tgmath.h, support/tst-support-open-dev-null-range.c, and sysdeps/x86_64/multiarch/strlen-vec.S, to work around the following obscure pre-commit check failure diagnostics from Savannah. I don't know why I run into these diagnostics whereas others evidently do not. remote: *** 912-#endif remote: *** 913: remote: *** 914- remote: *** error: lines with trailing whitespace found ... remote: *** error: sysdeps/unix/sysv/linux/statx_cp.c: trailing lines
79 lines
2.3 KiB
C
79 lines
2.3 KiB
C
/* Find path of executable.
|
|
Copyright (C) 1998-2022 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
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, see
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#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 = INTERNAL_SYSCALL_CALL (readlink, "/proc/self/exe", linkval,
|
|
sizeof (linkval));
|
|
if (! INTERNAL_SYSCALL_ERROR_P (len) && 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;
|
|
}
|