diff options
Diffstat (limited to 'sysdeps')
| -rw-r--r-- | sysdeps/generic/dl-origin.h | 47 | ||||
| -rw-r--r-- | sysdeps/mach/hurd/Makefile | 2 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/dl-origin.h | 67 |
3 files changed, 116 insertions, 0 deletions
diff --git a/sysdeps/generic/dl-origin.h b/sysdeps/generic/dl-origin.h new file mode 100644 index 0000000000..6d5a8da52e --- /dev/null +++ b/sysdeps/generic/dl-origin.h @@ -0,0 +1,47 @@ +/* Find path of executable. + Copyright (C) 1998 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 Library General Public License as + published by the Free Software Foundation; either version 2 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +/* Generally it is not possible to implement this. We have to fall + back on a solution where the user provides the information. */ +extern const char *_dl_origin_path; + +static inline const char * +get_origin (void) +{ + char *result = (char *) -1; + /* We use te environment variable LD_ORIGIN_PATH. If it is set make + a copy and strip out trailing slashes. */ + if (_dl_origin_path != NULL) + { + size_t len = strlen (_dl_origin_path); + result = malloc (len + 1); + if (result == NULL) + result = (char *) -1; + else + { + char *cp = __mempcpy (result, _dl_origin_path, len); + while (cp > result && cp[-1] == '/') + --cp; + *cp = '\0'; + } + } + + return result; +} diff --git a/sysdeps/mach/hurd/Makefile b/sysdeps/mach/hurd/Makefile index afd8473540..42e9a79e7b 100644 --- a/sysdeps/mach/hurd/Makefile +++ b/sysdeps/mach/hurd/Makefile @@ -124,6 +124,8 @@ $(inst_libdir)/libc.so: $(rpcuserlibs) # objects directly into the shared object. ifeq (elf,$(subdir)) $(objpfx)librtld.os: $(rpcuserlibs:.so=_pic.a) + +CFLAGS-dl-load.c = -DEXTERNAL_MAP_FROM_FD endif # We need these libs to link static programs in the libc source tree, too. diff --git a/sysdeps/unix/sysv/linux/dl-origin.h b/sysdeps/unix/sysv/linux/dl-origin.h new file mode 100644 index 0000000000..eef067814a --- /dev/null +++ b/sysdeps/unix/sysv/linux/dl-origin.h @@ -0,0 +1,67 @@ +/* Find path of executable. + Copyright (C) 1998 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 Library General Public License as + published by the Free Software Foundation; either version 2 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +/* 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. */ +extern const char *_dl_origin_path; + +static inline const char * +get_origin (void) +{ + char linkval[PATH_MAX]; + char *result; + + if (readlink ("/proc/self/exe", linkval, PATH_MAX) != -1 + && result[0] != '[') + { + /* We can use this value. */ + char *last_slash = strrchr (linkval, '/'); + result = (char *) malloc (linkval - last_slash + 1); + if (result == NULL) + result = (char *) -1; + else + *((char *) __mempcpy (result, linkval, linkval - last_slash)) = '\0'; + } + else + { + size_t len = 0; + + result = (char *) -1; + /* We use te environment variable LD_ORIGIN_PATH. If it is set make + a copy and strip out trailing slashes. */ + if (_dl_origin_path != NULL) + { + size_t len = strlen (_dl_origin_path); + result = malloc (len + 1); + if (result == NULL) + result = (char *) -1; + else + { + char *cp = __mempcpy (result, _dl_origin_path, len); + while (cp > result && cp[-1] == '/') + --cp; + *cp = '\0'; + } + } + } + + return result; +} |