332 lines
7.6 KiB
C
332 lines
7.6 KiB
C
/* Utility to update paths from internal to external forms.
|
|
Copyright (C) 1997, 1998 Free Software Foundation, Inc.
|
|
|
|
This file is part of GNU CC.
|
|
|
|
GNU CC 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.
|
|
|
|
GCC 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 GCC; see the file COPYING. If not, write to the Free
|
|
Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
Boston, MA 02111-1307, USA. */
|
|
|
|
/* This file contains routines to update a path, both to canonicalize
|
|
the directory format and to handle any prefix translation.
|
|
|
|
This file must be compiled with -DPREFIX= to specify the "prefix"
|
|
value used by configure. If a filename does not begin with this
|
|
prefix, it will not be affected other than by directory canonicalization.
|
|
|
|
Each caller of 'update_path' may specify both a filename and
|
|
a translation prefix and consist of the name of the package that contains
|
|
the file ("@GCC", "@BINUTIL", "@GNU", etc).
|
|
|
|
If the prefix is not specified, the filename will only undergo
|
|
directory canonicalization.
|
|
|
|
If it is specified, the string given by PREFIX will be replaced
|
|
by the specified prefix (with a '@' in front unless the prefix begins
|
|
with a '$') and further translation will be done as follows
|
|
until none of the two conditions below are met:
|
|
|
|
1) If the filename begins with '@', the string between the '@' and
|
|
the end of the name or the first '/' or directory separator will
|
|
be considered a "key" and looked up as follows:
|
|
|
|
-- If this is a Win32 OS, then the Registry will be examined for
|
|
an entry of "key" in
|
|
|
|
HKEY_LOCAL_MACHINE\SOFTWARE\Free Software Foundation\
|
|
|
|
if found, that value will be used.
|
|
|
|
-- If not found (or not a Win32 OS), the environment variable
|
|
key_ROOT (the value of "key" concatenated with the constant "_ROOT")
|
|
is tried. If that fails, then PREFIX (see above) is used.
|
|
|
|
2) If the filename begins with a '$', the rest of the string up
|
|
to the end or the first '/' or directory separator will be used
|
|
as an environment variable, whose value will be returned.
|
|
|
|
Once all this is done, any '/' will be converted to DIR_SEPARATOR,
|
|
if they are different.
|
|
|
|
NOTE: using resolve_keyed_path under Win32 requires linking with
|
|
advapi32.dll. */
|
|
|
|
|
|
#include "config.h"
|
|
#ifdef __STDC__
|
|
#include <stdarg.h>
|
|
#else
|
|
#include <varargs.h>
|
|
#endif
|
|
#include "system.h"
|
|
#ifdef _WIN32
|
|
#include <windows.h>
|
|
#endif
|
|
|
|
#include "gansidecl.h"
|
|
|
|
static char *std_prefix = PREFIX;
|
|
|
|
static char *get_key_value PROTO((char *));
|
|
static char *translate_name PROTO((char *));
|
|
static char *concat PVPROTO((char *, ...));
|
|
static char *save_string PROTO((char *, int));
|
|
|
|
#ifdef _WIN32
|
|
static char *lookup_key PROTO((char *));
|
|
static HKEY reg_key = (HKEY) INVALID_HANDLE_VALUE;
|
|
#endif
|
|
|
|
/* Given KEY, as above, return its value. */
|
|
|
|
static char *
|
|
get_key_value (key)
|
|
char *key;
|
|
{
|
|
char *prefix = 0;
|
|
char *temp = 0;
|
|
|
|
#ifdef _WIN32
|
|
prefix = lookup_key (key);
|
|
#endif
|
|
|
|
if (prefix == 0)
|
|
prefix = getenv (temp = concat (key, "_ROOT", NULL_PTR));
|
|
|
|
if (prefix == 0)
|
|
prefix = std_prefix;
|
|
|
|
if (temp)
|
|
free (temp);
|
|
|
|
return prefix;
|
|
}
|
|
|
|
/* Concatenate a sequence of strings, returning the result.
|
|
|
|
This function is based on the one in libiberty. */
|
|
|
|
static char *
|
|
concat VPROTO((char *first, ...))
|
|
{
|
|
register int length;
|
|
register char *newstr;
|
|
register char *end;
|
|
register char *arg;
|
|
va_list args;
|
|
#ifndef __STDC__
|
|
char *first;
|
|
#endif
|
|
|
|
/* First compute the size of the result and get sufficient memory. */
|
|
|
|
VA_START (args, first);
|
|
#ifndef __STDC__
|
|
first = va_arg (args, char *);
|
|
#endif
|
|
|
|
arg = first;
|
|
length = 0;
|
|
|
|
while (arg != 0)
|
|
{
|
|
length += strlen (arg);
|
|
arg = va_arg (args, char *);
|
|
}
|
|
|
|
newstr = (char *) malloc (length + 1);
|
|
va_end (args);
|
|
|
|
/* Now copy the individual pieces to the result string. */
|
|
|
|
VA_START (args, first);
|
|
#ifndef __STDC__
|
|
first = va_arg (args, char *);
|
|
#endif
|
|
|
|
end = newstr;
|
|
arg = first;
|
|
while (arg != 0)
|
|
{
|
|
while (*arg)
|
|
*end++ = *arg++;
|
|
arg = va_arg (args, char *);
|
|
}
|
|
*end = '\000';
|
|
va_end (args);
|
|
|
|
return (newstr);
|
|
}
|
|
|
|
/* Return a copy of a string that has been placed in the heap. */
|
|
|
|
static char *
|
|
save_string (s, len)
|
|
char *s;
|
|
int len;
|
|
{
|
|
register char *result = (char *) malloc (len + 1);
|
|
|
|
bcopy (s, result, len);
|
|
result[len] = 0;
|
|
return result;
|
|
}
|
|
|
|
#ifdef _WIN32
|
|
|
|
/* Look up "key" in the registry, as above. */
|
|
|
|
static char *
|
|
lookup_key (key)
|
|
char *key;
|
|
{
|
|
char *dst;
|
|
DWORD size;
|
|
DWORD type;
|
|
LONG res;
|
|
|
|
if (reg_key == (HKEY) INVALID_HANDLE_VALUE)
|
|
{
|
|
res = RegOpenKeyExA (HKEY_LOCAL_MACHINE, "SOFTWARE", 0,
|
|
KEY_READ, ®_key);
|
|
|
|
if (res == ERROR_SUCCESS)
|
|
res = RegOpenKeyExA (reg_key, "Free Software Foundation", 0,
|
|
KEY_READ, ®_key);
|
|
|
|
if (res != ERROR_SUCCESS)
|
|
{
|
|
reg_key = (HKEY) INVALID_HANDLE_VALUE;
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
size = 32;
|
|
dst = (char *) malloc (size);
|
|
|
|
res = RegQueryValueExA (reg_key, key, 0, &type, dst, &size);
|
|
if (res == ERROR_MORE_DATA && type == REG_SZ)
|
|
{
|
|
dst = (char *) realloc (dst, size);
|
|
res = RegQueryValueExA (reg_key, key, 0, &type, dst, &size);
|
|
}
|
|
|
|
if (type != REG_SZ || res != ERROR_SUCCESS)
|
|
{
|
|
free (dst);
|
|
dst = 0;
|
|
}
|
|
|
|
return dst;
|
|
}
|
|
#endif
|
|
|
|
/* If NAME starts with a '@' or '$', apply the translation rules above
|
|
and return a new name. Otherwise, return the given name. */
|
|
|
|
static char *
|
|
translate_name (name)
|
|
char *name;
|
|
{
|
|
char code = name[0];
|
|
char *key, *prefix = 0;
|
|
int keylen;
|
|
|
|
if (code != '@' && code != '$')
|
|
return name;
|
|
|
|
for (keylen = 0;
|
|
(name[keylen + 1] != 0 && name[keylen + 1] != '/'
|
|
#ifdef DIR_SEPARATOR
|
|
&& name[keylen + 1] != DIR_SEPARATOR
|
|
#endif
|
|
);
|
|
keylen++)
|
|
;
|
|
|
|
key = alloca (keylen + 1);
|
|
strncpy (key, &name[1], keylen);
|
|
key[keylen] = 0;
|
|
|
|
name = &name[keylen + 1];
|
|
|
|
if (code == '@')
|
|
{
|
|
prefix = get_key_value (key);
|
|
if (prefix == 0)
|
|
prefix = std_prefix;
|
|
}
|
|
else
|
|
prefix = getenv (key);
|
|
|
|
if (prefix == 0)
|
|
prefix = PREFIX;
|
|
|
|
/* Remove any trailing directory separator from what we got. */
|
|
if (prefix[strlen (prefix) - 1] == '/'
|
|
#ifdef DIR_SEPARATOR
|
|
|| prefix[strlen (prefix) - 1] == DIR_SEPARATOR
|
|
#endif
|
|
)
|
|
{
|
|
prefix = save_string (prefix, strlen (prefix));
|
|
prefix[strlen (prefix) - 1] = 0;
|
|
}
|
|
|
|
return concat (prefix, name, NULL_PTR);
|
|
}
|
|
|
|
/* Update PATH using KEY if PATH starts with PREFIX. */
|
|
|
|
char *
|
|
update_path (path, key)
|
|
char *path;
|
|
char *key;
|
|
{
|
|
if (! strncmp (path, std_prefix, strlen (std_prefix)) && key != 0)
|
|
{
|
|
if (key[0] != '$')
|
|
key = concat ("@", key, NULL_PTR);
|
|
|
|
path = concat (key, &path[strlen (std_prefix)], NULL_PTR);
|
|
|
|
while (path[0] == '@' || path[0] == '$')
|
|
path = translate_name (path);
|
|
}
|
|
|
|
#ifdef DIR_SEPARATOR
|
|
if (DIR_SEPARATOR != '/')
|
|
{
|
|
int i;
|
|
int len = strlen (path);
|
|
|
|
path = save_string (path, len);
|
|
for (i = 0; i < len; i++)
|
|
if (path[i] == '/')
|
|
path[i] = DIR_SEPARATOR;
|
|
}
|
|
#endif
|
|
|
|
return path;
|
|
}
|
|
|
|
/* Reset the standard prefix */
|
|
void
|
|
set_std_prefix (prefix, len)
|
|
char *prefix;
|
|
int len;
|
|
{
|
|
std_prefix = save_string (prefix, len);
|
|
}
|