mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-03 04:12:10 +08:00
fd67aa1129
Adds two new external authors to etc/update-copyright.py to cover bfd/ax_tls.m4, and adds gprofng to dirs handled automatically, then updates copyright messages as follows: 1) Update cgen/utils.scm emitted copyrights. 2) Run "etc/update-copyright.py --this-year" with an extra external author I haven't committed, 'Kalray SA.', to cover gas testsuite files (which should have their copyright message removed). 3) Build with --enable-maintainer-mode --enable-cgen-maint=yes. 4) Check out */po/*.pot which we don't update frequently.
307 lines
8.1 KiB
C
307 lines
8.1 KiB
C
/* Libiberty realpath. Like realpath, but more consistent behavior.
|
|
Based on gdb_realpath from GDB.
|
|
|
|
Copyright (C) 2003-2024 Free Software Foundation, Inc.
|
|
|
|
This file is part of the libiberty library.
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program 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 General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, write to the Free Software
|
|
Foundation, Inc., 51 Franklin Street - Fifth Floor,
|
|
Boston, MA 02110-1301, USA. */
|
|
|
|
/*
|
|
|
|
@deftypefn Replacement {const char*} lrealpath (const char *@var{name})
|
|
|
|
Given a pointer to a string containing a pathname, returns a canonical
|
|
version of the filename. Symlinks will be resolved, and ``.'' and ``..''
|
|
components will be simplified. The returned value will be allocated using
|
|
@code{malloc}, or @code{NULL} will be returned on a memory allocation error.
|
|
|
|
@end deftypefn
|
|
|
|
*/
|
|
|
|
#include "config.h"
|
|
#include "ansidecl.h"
|
|
#include "libiberty.h"
|
|
|
|
#ifdef HAVE_LIMITS_H
|
|
#include <limits.h>
|
|
#endif
|
|
#ifdef HAVE_STDLIB_H
|
|
#include <stdlib.h>
|
|
#endif
|
|
#ifdef HAVE_UNISTD_H
|
|
#include <unistd.h>
|
|
#endif
|
|
#ifdef HAVE_STRING_H
|
|
#include <string.h>
|
|
#endif
|
|
|
|
/* On GNU libc systems the declaration is only visible with _GNU_SOURCE. */
|
|
#if defined(HAVE_CANONICALIZE_FILE_NAME) \
|
|
&& defined(NEED_DECLARATION_CANONICALIZE_FILE_NAME)
|
|
extern char *canonicalize_file_name (const char *);
|
|
#endif
|
|
|
|
#if defined(HAVE_REALPATH)
|
|
# if defined (PATH_MAX)
|
|
# define REALPATH_LIMIT PATH_MAX
|
|
# else
|
|
# if defined (MAXPATHLEN)
|
|
# define REALPATH_LIMIT MAXPATHLEN
|
|
# endif
|
|
# endif
|
|
#else
|
|
/* cygwin has realpath, so it won't get here. */
|
|
# if defined (_WIN32)
|
|
# define WIN32_LEAN_AND_MEAN
|
|
# include <windows.h> /* for GetFullPathName/GetFinalPathNameByHandle/
|
|
CreateFile/CloseHandle */
|
|
# define WIN32_REPLACE_SLASHES(_ptr, _len) \
|
|
for (unsigned i = 0; i != (_len); ++i) \
|
|
if ((_ptr)[i] == '\\') (_ptr)[i] = '/';
|
|
|
|
# define WIN32_UNC_PREFIX "//?/UNC/"
|
|
# define WIN32_UNC_PREFIX_LEN (sizeof(WIN32_UNC_PREFIX)-1)
|
|
# define WIN32_IS_UNC_PREFIX(ptr) \
|
|
(0 == memcmp(ptr, WIN32_UNC_PREFIX, WIN32_UNC_PREFIX_LEN))
|
|
|
|
# define WIN32_NON_UNC_PREFIX "//?/"
|
|
# define WIN32_NON_UNC_PREFIX_LEN (sizeof(WIN32_NON_UNC_PREFIX)-1)
|
|
# define WIN32_IS_NON_UNC_PREFIX(ptr) \
|
|
(0 == memcmp(ptr, WIN32_NON_UNC_PREFIX, WIN32_NON_UNC_PREFIX_LEN))
|
|
|
|
/* Get full path name without symlinks resolution.
|
|
It also converts all forward slashes to back slashes.
|
|
*/
|
|
char* get_full_path_name(const char *filename) {
|
|
DWORD len;
|
|
char *buf, *ptr, *res;
|
|
|
|
/* determining the required buffer size.
|
|
from the man: `If the lpBuffer buffer is too small to contain
|
|
the path, the return value is the size, in TCHARs, of the buffer
|
|
that is required to hold the path _and_the_terminating_null_character_`
|
|
*/
|
|
len = GetFullPathName(filename, 0, NULL, NULL);
|
|
|
|
if ( len == 0 )
|
|
return strdup(filename);
|
|
|
|
buf = (char *)malloc(len);
|
|
|
|
/* no point to check the result again */
|
|
len = GetFullPathName(filename, len, buf, NULL);
|
|
buf[len] = 0;
|
|
|
|
/* replace slashes */
|
|
WIN32_REPLACE_SLASHES(buf, len);
|
|
|
|
/* calculate offset based on prefix type */
|
|
len = WIN32_IS_UNC_PREFIX(buf)
|
|
? (WIN32_UNC_PREFIX_LEN - 2)
|
|
: WIN32_IS_NON_UNC_PREFIX(buf)
|
|
? WIN32_NON_UNC_PREFIX_LEN
|
|
: 0
|
|
;
|
|
|
|
ptr = buf + len;
|
|
if ( WIN32_IS_UNC_PREFIX(buf) ) {
|
|
ptr[0] = '/';
|
|
ptr[1] = '/';
|
|
}
|
|
|
|
res = strdup(ptr);
|
|
|
|
free(buf);
|
|
|
|
return res;
|
|
}
|
|
|
|
# if _WIN32_WINNT >= 0x0600
|
|
|
|
/* Get full path name WITH symlinks resolution.
|
|
It also converts all forward slashes to back slashes.
|
|
*/
|
|
char* get_final_path_name(HANDLE fh) {
|
|
DWORD len;
|
|
char *buf, *ptr, *res;
|
|
|
|
/* determining the required buffer size.
|
|
from the man: `If the function fails because lpszFilePath is too
|
|
small to hold the string plus the terminating null character,
|
|
the return value is the required buffer size, in TCHARs. This
|
|
value _includes_the_size_of_the_terminating_null_character_`.
|
|
but in my testcase I have path with 26 chars, the function
|
|
returns 26 also, ie without the trailing zero-char...
|
|
*/
|
|
len = GetFinalPathNameByHandle(
|
|
fh
|
|
,NULL
|
|
,0
|
|
,FILE_NAME_NORMALIZED | VOLUME_NAME_DOS
|
|
);
|
|
|
|
if ( len == 0 )
|
|
return NULL;
|
|
|
|
len += 1; /* for zero-char */
|
|
buf = (char *)malloc(len);
|
|
|
|
/* no point to check the result again */
|
|
len = GetFinalPathNameByHandle(
|
|
fh
|
|
,buf
|
|
,len
|
|
,FILE_NAME_NORMALIZED | VOLUME_NAME_DOS
|
|
);
|
|
buf[len] = 0;
|
|
|
|
/* replace slashes */
|
|
WIN32_REPLACE_SLASHES(buf, len);
|
|
|
|
/* calculate offset based on prefix type */
|
|
len = WIN32_IS_UNC_PREFIX(buf)
|
|
? (WIN32_UNC_PREFIX_LEN - 2)
|
|
: WIN32_IS_NON_UNC_PREFIX(buf)
|
|
? WIN32_NON_UNC_PREFIX_LEN
|
|
: 0
|
|
;
|
|
|
|
ptr = buf + len;
|
|
if ( WIN32_IS_UNC_PREFIX(buf) ) {
|
|
ptr[0] = '/';
|
|
ptr[1] = '/';
|
|
}
|
|
|
|
res = strdup(ptr);
|
|
|
|
free(buf);
|
|
|
|
return res;
|
|
}
|
|
|
|
# endif // _WIN32_WINNT >= 0x0600
|
|
|
|
# endif // _WIN32
|
|
#endif
|
|
|
|
char *
|
|
lrealpath (const char *filename)
|
|
{
|
|
/* Method 1: The system has a compile time upper bound on a filename
|
|
path. Use that and realpath() to canonicalize the name. This is
|
|
the most common case. Note that, if there isn't a compile time
|
|
upper bound, you want to avoid realpath() at all costs. */
|
|
#if defined(REALPATH_LIMIT)
|
|
{
|
|
char buf[REALPATH_LIMIT];
|
|
const char *rp = realpath (filename, buf);
|
|
if (rp == NULL)
|
|
rp = filename;
|
|
return strdup (rp);
|
|
}
|
|
#endif /* REALPATH_LIMIT */
|
|
|
|
/* Method 2: The host system (i.e., GNU) has the function
|
|
canonicalize_file_name() which malloc's a chunk of memory and
|
|
returns that, use that. */
|
|
#if defined(HAVE_CANONICALIZE_FILE_NAME)
|
|
{
|
|
char *rp = canonicalize_file_name (filename);
|
|
if (rp == NULL)
|
|
return strdup (filename);
|
|
else
|
|
return rp;
|
|
}
|
|
#endif
|
|
|
|
/* Method 3: Now we're getting desperate! The system doesn't have a
|
|
compile time buffer size and no alternative function. Query the
|
|
OS, using pathconf(), for the buffer limit. Care is needed
|
|
though, some systems do not limit PATH_MAX (return -1 for
|
|
pathconf()) making it impossible to pass a correctly sized buffer
|
|
to realpath() (it could always overflow). On those systems, we
|
|
skip this. */
|
|
#if defined (HAVE_REALPATH) && defined (HAVE_UNISTD_H)
|
|
{
|
|
/* Find out the max path size. */
|
|
long path_max = pathconf ("/", _PC_PATH_MAX);
|
|
if (path_max > 0)
|
|
{
|
|
/* PATH_MAX is bounded. */
|
|
char *buf, *rp, *ret;
|
|
buf = (char *) malloc (path_max);
|
|
if (buf == NULL)
|
|
return NULL;
|
|
rp = realpath (filename, buf);
|
|
ret = strdup (rp ? rp : filename);
|
|
free (buf);
|
|
return ret;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
/* The MS Windows method */
|
|
#if defined (_WIN32)
|
|
{
|
|
char *res;
|
|
|
|
/* For Windows Vista and greater */
|
|
#if _WIN32_WINNT >= 0x0600
|
|
|
|
/* For some reason the function receives just empty `filename`, but not NULL.
|
|
What should we do in that case?
|
|
According to `strdup()` implementation
|
|
(https://elixir.bootlin.com/glibc/latest/source/string/strdup.c)
|
|
it will alloc 1 byte even for empty but non NULL string.
|
|
OK, will use `strdup()` for that case.
|
|
*/
|
|
if ( 0 == strlen(filename) )
|
|
return strdup(filename);
|
|
|
|
HANDLE fh = CreateFile(
|
|
filename
|
|
,FILE_READ_ATTRIBUTES
|
|
,FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE
|
|
,NULL
|
|
,OPEN_EXISTING
|
|
,FILE_FLAG_BACKUP_SEMANTICS
|
|
,NULL
|
|
);
|
|
|
|
if ( fh == INVALID_HANDLE_VALUE ) {
|
|
res = get_full_path_name(filename);
|
|
} else {
|
|
res = get_final_path_name(fh);
|
|
CloseHandle(fh);
|
|
|
|
if ( !res )
|
|
res = get_full_path_name(filename);
|
|
}
|
|
|
|
#else
|
|
|
|
/* For Windows XP */
|
|
res = get_full_path_name(filename);
|
|
|
|
#endif // _WIN32_WINNT >= 0x0600
|
|
|
|
return res;
|
|
}
|
|
#endif // _WIN32
|
|
}
|