e6caf4e12e
2002-03-01 Ulrich Drepper <drepper@redhat.com> * elf/Makefile (dl-routines): Add dl-origin. (elide-routines.os): Add dl-origin. * elf/Versions [ld] (GLIBC_PRIVATE): Add _dl_get_origin. * elf/dl-debug.c (_dl_debug_initialize): Add missing INTUSE around _dl_debug_state. * include/libc-symbols.c: Define attribute_hidden depending on HAVE_VISIBILITY_ATTRIBUTE. Add definition of INTVARDEF. * elf/dl-deps.c: Use INTUSE with __libc_enable_secure. * elf/dl-load.c: Likewise. * elf/rtld.c: Likewise. * include/unistd.h: Declare __libc_enable_secure_internal. * sysdeps/generic/dl-sysdep.c: Use INTVARDEF with __libc_enable_secure. Use INTUSE with __libc_enable_secure. * sysdeps/mach/hurd/dl-sysdep.c: Likewise. * elf/dl-deps.c: Use INTUSE with _dl_out_of_memory. * elf/dl-error.c: Likewise, * sysdeps/generic/ldsodefs.h: Declare _dl_out_of_memory_internal. * elf/dl-dst.h [_RTLD_GLOBAL]: Define _dl_get_origin to use INTUSE. * sysdeps/generic/dl-origin.c: Undefine _dl_get_origin macro before function definition. Use INTDEF with _dl_get_origin. * sysdeps/unix/sysv/linux/dl-origin.c: Likewise. * elf/dl-init.c: Use INTUSE with _dl_starting_up. * elf/rtld.c: Likewise. Use INTVARDEF for _dl_starting_up. * elf/dl-profile.c: Use INTDEF for _dl_mcount. * elf/dl-runtime.c: Use INTUSE with _dl_mcount. * sysdeps/generic/ldsodefs.h: Declare _dl_mcount_internal. * elf/dl-conflict.c: Use rtld_progrname instead of _dl_argv[0]. * elf/dl-deps.c: Likewise. * elf/dl-error.c: Likewise. * elf/dl-fini.c: Likewise. * elf/dl-init.c: Likewise. * elf/dl-load.c: Likewise. * elf/dl-lookup.c: Likewise. * elf/dl-reloc.c: Likewise. * elf/dl-version.c: Likewise. * elf/do-lookup.h: Likewise. * sysdeps/arm/dl-machine.h: Likewise. * sysdeps/cris/dl-machine.h: Likewise. * sysdeps/hppa/dl-machine.h: Likewise. * sysdeps/i386/dl-machine.h: Likewise. * sysdeps/m68k/dl-machine.h: Likewise. * sysdeps/powerpc/dl-machine.h: Likewise. * sysdeps/s390/s390-32/dl-machine.h: Likewise. * sysdeps/s390/s390-64/dl-machine.h: Likewise. * sysdeps/sh/dl-machine.h: Likewise. * sysdeps/sparc/sparc-32/dl-machine.h: Likewise. * sysdeps/sparc/sparc-64/dl-machine.h: Likewise. * sysdeps/x86_64/dl-machine.h: Likewise. * elf/rtld.c: Use INTDEF for _dl_argv. Use rtld_progrname instead of _dl_argv[0]. Use INTUSE with _dl_argv. * sysdeps/generic/dl-sysdep.c: Use INTUSE with _dl_argv. * sysdeps/generic/ldsodefs.h: Define rtld_progname macro.
81 lines
2.4 KiB
C
81 lines
2.4 KiB
C
/* Find path of executable.
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Copyright (C) 1998, 1999, 2000, 2002 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#include <assert.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/param.h>
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#include <ldsodefs.h>
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#include <dl-dst.h>
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/* On Linux >= 2.1 systems which have the dcache implementation we can get
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the path of the application from the /proc/self/exe symlink. Try this
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first and fall back on the generic method if necessary. */
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#undef _dl_get_origin
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const char *
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_dl_get_origin (void)
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{
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char linkval[PATH_MAX];
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char *result;
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int len;
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if ((len = __readlink ("/proc/self/exe", linkval, sizeof (linkval))) > 0
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&& linkval[0] != '[')
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{
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/* We can use this value. */
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assert (linkval[0] == '/');
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while (len > 1 && linkval[len - 1] != '/')
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--len;
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result = (char *) malloc (len + 1);
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if (result == NULL)
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result = (char *) -1;
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else if (len == 1)
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memcpy (result, "/", 2);
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else
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*((char *) __mempcpy (result, linkval, len - 1)) = '\0';
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}
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else
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{
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result = (char *) -1;
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/* We use the environment variable LD_ORIGIN_PATH. If it is set make
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a copy and strip out trailing slashes. */
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if (GL(dl_origin_path) != NULL)
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{
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size_t len = strlen (GL(dl_origin_path));
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result = (char *) malloc (len + 1);
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if (result == NULL)
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result = (char *) -1;
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else
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{
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char *cp = __mempcpy (result, GL(dl_origin_path), len);
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while (cp > result + 1 && cp[-1] == '/')
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--cp;
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*cp = '\0';
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}
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}
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}
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return result;
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}
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INTDEF(_dl_get_origin)
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