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* dlfcn.cc (gfpod_helper): Helper function to search DLL using

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a given DLL name.  Change default search path to allow /usr/bin.
	(get_full_path_of_dll): Find DLLs even if the caller used a ".so"
	suffix or a "lib" prefix for the DLL.
This commit is contained in:
Corinna Vinschen 2011-09-01 08:17:07 +00:00
parent 52a5f8cc1a
commit e2d88014ac
2 changed files with 53 additions and 6 deletions
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7
winsup/cygwin/ChangeLog
View File

@ -1,3 +1,10 @@
2011-09-01 Corinna Vinschen <corinna@vinschen.de>
* dlfcn.cc (gfpod_helper): Helper function to search DLL using
a given DLL name. Change default search path to allow /usr/bin.
(get_full_path_of_dll): Find DLLs even if the caller used a ".so"
suffix or a "lib" prefix for the DLL.
2011-08-31 Corinna Vinschen <corinna@vinschen.de>
* flock.cc (inode_t::unlock_and_remove_if_unused): Rename from

52
winsup/cygwin/dlfcn.cc
View File

@ -36,8 +36,20 @@ check_path_access (const char *mywinenv, const char *name, path_conv& buf)
return find_exec (name, buf, mywinenv, FE_NNF | FE_NATIVE | FE_CWD | FE_DLL);
}
/* Search LD_LIBRARY_PATH for dll, if it exists.
Return Windows version of given path. */
/* Search LD_LIBRARY_PATH for dll, if it exists. Search /usr/bin and /usr/lib
by default. Return valid full path in path_conv real_filename. */
static inline bool
gfpod_helper (const char *name, path_conv &real_filename)
{
if (isabspath (name))
real_filename.check (name, PC_SYM_FOLLOW | PC_NULLEMPTY);
else if (!check_path_access ("LD_LIBRARY_PATH=", name, real_filename))
check_path_access ("/usr/bin:/usr/lib", name, real_filename);
if (!real_filename.exists ())
real_filename.error = ENOENT;
return !real_filename.error;
}
static bool __stdcall
get_full_path_of_dll (const char* str, path_conv &real_filename)
{
@ -55,11 +67,39 @@ get_full_path_of_dll (const char* str, path_conv &real_filename)
strcpy (name, str); /* Put it somewhere where we can manipulate it. */
if (isabspath (name) ||
(check_path_access ("LD_LIBRARY_PATH=", name, real_filename)
?: check_path_access ("/usr/lib", name, real_filename)) == NULL)
real_filename.check (name, PC_SYM_FOLLOW | PC_NOFULL | PC_NULLEMPTY);
char *basename = strrchr (name, '/');
basename = basename ? basename + 1 : name;
char *suffix = strrchr (name, '.');
if (suffix && suffix < basename)
suffix = NULL;
/* Is suffix ".so"? */
if (suffix && !strcmp (suffix, ".so"))
{
/* Does the file exist? */
if (gfpod_helper (name, real_filename))
return true;
/* No, replace ".so" with ".dll". */
strcpy (suffix, ".dll");
}
/* Does the filename start with "lib"? */
if (!strncmp (basename, "lib", 3))
{
/* Yes, replace "lib" with "cyg". */
strncpy (basename, "cyg", 3);
/* Does the file exist? */
if (gfpod_helper (name, real_filename))
return true;
/* No, revert back to "lib". */
strncpy (basename, "lib", 3);
}
if (gfpod_helper (name, real_filename))
return true;
/* If nothing worked, create a relative path from the original incoming
filename and let LoadLibrary search for it using the system default
DLL search path. */
real_filename.check (str, PC_SYM_FOLLOW | PC_NOFULL | PC_NULLEMPTY);
if (!real_filename.error)
return true;