diff options
Diffstat (limited to 'libltdl/ltdl.c')
| -rw-r--r-- | libltdl/ltdl.c | 2392 |
1 files changed, 0 insertions, 2392 deletions
diff --git a/libltdl/ltdl.c b/libltdl/ltdl.c deleted file mode 100644 index a89c6bb..0000000 --- a/libltdl/ltdl.c +++ /dev/null @@ -1,2392 +0,0 @@ -/* ltdl.c -- system independent dlopen wrapper - - Copyright (C) 1998, 1999, 2000, 2004, 2005, 2006, - 2007, 2008 Free Software Foundation, Inc. - Written by Thomas Tanner, 1998 - - NOTE: The canonical source of this file is maintained with the - GNU Libtool package. Report bugs to bug-libtool@gnu.org. - -GNU Libltdl is free software; you can redistribute it and/or -modify it under the terms of the GNU Lesser General Public -License as published by the Free Software Foundation; either -version 2 of the License, or (at your option) any later version. - -As a special exception to the GNU Lesser General Public License, -if you distribute this file as part of a program or library that -is built using GNU Libtool, you may include this file under the -same distribution terms that you use for the rest of that program. - -GNU Libltdl 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 Lesser General Public License for more details. - -You should have received a copy of the GNU Lesser General Public -License along with GNU Libltdl; see the file COPYING.LIB. If not, a -copy can be downloaded from http://www.gnu.org/licenses/lgpl.html, -or obtained by writing to the Free Software Foundation, Inc., -51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. -*/ - -#include "lt__private.h" -#include "lt_system.h" -#include "lt_dlloader.h" - - -/* --- MANIFEST CONSTANTS --- */ - - -/* Standard libltdl search path environment variable name */ -#undef LTDL_SEARCHPATH_VAR -#define LTDL_SEARCHPATH_VAR "LTDL_LIBRARY_PATH" - -/* Standard libtool archive file extension. */ -#undef LT_ARCHIVE_EXT -#define LT_ARCHIVE_EXT ".la" - -/* max. filename length */ -#if !defined(LT_FILENAME_MAX) -# define LT_FILENAME_MAX 1024 -#endif - -/* This is the maximum symbol size that won't require malloc/free */ -#undef LT_SYMBOL_LENGTH -#define LT_SYMBOL_LENGTH 128 - -/* This accounts for the _LTX_ separator */ -#undef LT_SYMBOL_OVERHEAD -#define LT_SYMBOL_OVERHEAD 5 - -/* Various boolean flags can be stored in the flags field of an - lt_dlhandle... */ -#define LT_DLIS_RESIDENT(handle) ((handle)->info.is_resident) -#define LT_DLIS_SYMGLOBAL(handle) ((handle)->info.is_symglobal) -#define LT_DLIS_SYMLOCAL(handle) ((handle)->info.is_symlocal) - - -static const char objdir[] = LT_OBJDIR; -static const char archive_ext[] = LT_ARCHIVE_EXT; -#if defined(LT_MODULE_EXT) -static const char shlib_ext[] = LT_MODULE_EXT; -#endif -#if defined(LT_DLSEARCH_PATH) -static const char sys_dlsearch_path[] = LT_DLSEARCH_PATH; -#endif - - - - -/* --- DYNAMIC MODULE LOADING --- */ - - -/* The type of a function used at each iteration of foreach_dirinpath(). */ -typedef int foreach_callback_func (char *filename, void *data1, - void *data2); -/* foreachfile_callback itself calls a function of this type: */ -typedef int file_worker_func (const char *filename, void *data); - - -static int foreach_dirinpath (const char *search_path, - const char *base_name, - foreach_callback_func *func, - void *data1, void *data2); -static int find_file_callback (char *filename, void *data1, - void *data2); -static int find_handle_callback (char *filename, void *data, - void *ignored); -static int foreachfile_callback (char *filename, void *data1, - void *data2); - - -static int canonicalize_path (const char *path, char **pcanonical); -static int argzize_path (const char *path, - char **pargz, size_t *pargz_len); -static FILE *find_file (const char *search_path, - const char *base_name, char **pdir); -static lt_dlhandle *find_handle (const char *search_path, - const char *base_name, - lt_dlhandle *handle, - lt_dladvise advise); -static int find_module (lt_dlhandle *handle, const char *dir, - const char *libdir, const char *dlname, - const char *old_name, int installed, - lt_dladvise advise); -static int has_library_ext (const char *filename); -static int load_deplibs (lt_dlhandle handle, char *deplibs); -static int trim (char **dest, const char *str); -static int try_dlopen (lt_dlhandle *handle, - const char *filename, const char *ext, - lt_dladvise advise); -static int tryall_dlopen (lt_dlhandle *handle, - const char *filename, - lt_dladvise padvise, - const lt_dlvtable *vtable); -static int unload_deplibs (lt_dlhandle handle); -static int lt_argz_insert (char **pargz, size_t *pargz_len, - char *before, const char *entry); -static int lt_argz_insertinorder (char **pargz, size_t *pargz_len, - const char *entry); -static int lt_argz_insertdir (char **pargz, size_t *pargz_len, - const char *dirnam, struct dirent *dp); -static int lt_dlpath_insertdir (char **ppath, char *before, - const char *dir); -static int list_files_by_dir (const char *dirnam, - char **pargz, size_t *pargz_len); -static int file_not_found (void); - -#ifdef HAVE_LIBDLLOADER -static int loader_init_callback (lt_dlhandle handle); -#endif /* HAVE_LIBDLLOADER */ - -static int loader_init (lt_get_vtable *vtable_func, - lt_user_data data); - -static char *user_search_path= 0; -static lt_dlhandle handles = 0; -static int initialized = 0; - -/* Our memory failure callback sets the error message to be passed back - up to the client, so we must be careful to return from mallocation - callers if allocation fails (as this callback returns!!). */ -void -lt__alloc_die_callback (void) -{ - LT__SETERROR (NO_MEMORY); -} - -#ifdef HAVE_LIBDLLOADER -/* This function is called to initialise each preloaded module loader, - and hook it into the list of loaders to be used when attempting to - dlopen an application module. */ -static int -loader_init_callback (lt_dlhandle handle) -{ - lt_get_vtable *vtable_func = (lt_get_vtable *) lt_dlsym (handle, "get_vtable"); - return loader_init (vtable_func, 0); -} -#endif /* HAVE_LIBDLLOADER */ - -static int -loader_init (lt_get_vtable *vtable_func, lt_user_data data) -{ - const lt_dlvtable *vtable = 0; - int errors = 0; - - if (vtable_func) - { - vtable = (*vtable_func) (data); - } - - /* lt_dlloader_add will LT__SETERROR if it fails. */ - errors += lt_dlloader_add (vtable); - - assert (errors || vtable); - - if ((!errors) && vtable->dlloader_init) - { - if ((*vtable->dlloader_init) (vtable->dlloader_data)) - { - LT__SETERROR (INIT_LOADER); - ++errors; - } - } - - return errors; -} - -/* Bootstrap the loader loading with the preopening loader. */ -#define get_vtable preopen_LTX_get_vtable -#define preloaded_symbols LT_CONC3(lt_, LTDLOPEN, _LTX_preloaded_symbols) - -LT_BEGIN_C_DECLS -LT_SCOPE const lt_dlvtable * get_vtable (lt_user_data data); -LT_END_C_DECLS -#ifdef HAVE_LIBDLLOADER -extern lt_dlsymlist preloaded_symbols; -#endif - -/* Initialize libltdl. */ -int -lt_dlinit (void) -{ - int errors = 0; - - /* Initialize only at first call. */ - if (++initialized == 1) - { - lt__alloc_die = lt__alloc_die_callback; - handles = 0; - user_search_path = 0; /* empty search path */ - - /* First set up the statically loaded preload module loader, so - we can use it to preopen the other loaders we linked in at - compile time. */ - errors += loader_init (get_vtable, 0); - - /* Now open all the preloaded module loaders, so the application - can use _them_ to lt_dlopen its own modules. */ -#ifdef HAVE_LIBDLLOADER - if (!errors) - { - errors += lt_dlpreload (&preloaded_symbols); - } - - if (!errors) - { - errors += lt_dlpreload_open (LT_STR(LTDLOPEN), loader_init_callback); - } -#endif /* HAVE_LIBDLLOADER */ - } - -#ifdef LT_DEBUG_LOADERS - lt_dlloader_dump(); -#endif - - return errors; -} - -int -lt_dlexit (void) -{ - /* shut down libltdl */ - lt_dlloader *loader = 0; - lt_dlhandle handle = handles; - int errors = 0; - - if (!initialized) - { - LT__SETERROR (SHUTDOWN); - ++errors; - goto done; - } - - /* shut down only at last call. */ - if (--initialized == 0) - { - int level; - - while (handles && LT_DLIS_RESIDENT (handles)) - { - handles = handles->next; - } - - /* close all modules */ - for (level = 1; handle; ++level) - { - lt_dlhandle cur = handles; - int saw_nonresident = 0; - - while (cur) - { - lt_dlhandle tmp = cur; - cur = cur->next; - if (!LT_DLIS_RESIDENT (tmp)) - { - saw_nonresident = 1; - if (tmp->info.ref_count <= level) - { - if (lt_dlclose (tmp)) - { - ++errors; - } - /* Make sure that the handle pointed to by 'cur' still exists. - lt_dlclose recursively closes dependent libraries which removes - them from the linked list. One of these might be the one - pointed to by 'cur'. */ - if (cur) - { - for (tmp = handles; tmp; tmp = tmp->next) - if (tmp == cur) - break; - if (! tmp) - cur = handles; - } - } - } - } - /* done if only resident modules are left */ - if (!saw_nonresident) - break; - } - - /* When removing loaders, we can only find out failure by testing - the error string, so avoid a spurious one from an earlier - failed command. */ - if (!errors) - LT__SETERRORSTR (0); - - /* close all loaders */ - for (loader = (lt_dlloader *) lt_dlloader_next (NULL); loader;) - { - lt_dlloader *next = (lt_dlloader *) lt_dlloader_next (loader); - lt_dlvtable *vtable = (lt_dlvtable *) lt_dlloader_get (loader); - - if ((vtable = lt_dlloader_remove ((char *) vtable->name))) - { - FREE (vtable); - } - else - { - /* ignore errors due to resident modules */ - const char *err; - LT__GETERROR (err); - if (err) - ++errors; - } - - loader = next; - } - - FREE(user_search_path); - } - - done: - return errors; -} - - -/* Try VTABLE or, if VTABLE is NULL, all available loaders for FILENAME. - If the library is not successfully loaded, return non-zero. Otherwise, - the dlhandle is stored at the address given in PHANDLE. */ -static int -tryall_dlopen (lt_dlhandle *phandle, const char *filename, - lt_dladvise advise, const lt_dlvtable *vtable) -{ - lt_dlhandle handle = handles; - const char * saved_error = 0; - int errors = 0; - -#ifdef LT_DEBUG_LOADERS - fprintf (stderr, "tryall_dlopen (%s, %s)\n", - filename ? filename : "(null)", - vtable ? vtable->name : "(ALL)"); -#endif - - LT__GETERROR (saved_error); - - /* check whether the module was already opened */ - for (;handle; handle = handle->next) - { - if ((handle->info.filename == filename) /* dlopen self: 0 == 0 */ - || (handle->info.filename && filename - && streq (handle->info.filename, filename))) - { - break; - } - } - - if (handle) - { - ++handle->info.ref_count; - *phandle = handle; - goto done; - } - - handle = *phandle; - if (filename) - { - /* Comment out the check of file permissions using access. - This call seems to always return -1 with error EACCES. - */ - /* We need to catch missing file errors early so that - file_not_found() can detect what happened. - if (access (filename, R_OK) != 0) - { - LT__SETERROR (FILE_NOT_FOUND); - ++errors; - goto done; - } */ - - handle->info.filename = lt__strdup (filename); - if (!handle->info.filename) - { - ++errors; - goto done; - } - } - else - { - handle->info.filename = 0; - } - - { - lt_dlloader loader = lt_dlloader_next (0); - const lt_dlvtable *loader_vtable; - - do - { - if (vtable) - loader_vtable = vtable; - else - loader_vtable = lt_dlloader_get (loader); - -#ifdef LT_DEBUG_LOADERS - fprintf (stderr, "Calling %s->module_open (%s)\n", - (loader_vtable && loader_vtable->name) ? loader_vtable->name : "(null)", - filename ? filename : "(null)"); -#endif - handle->module = (*loader_vtable->module_open) (loader_vtable->dlloader_data, - filename, advise); -#ifdef LT_DEBUG_LOADERS - fprintf (stderr, " Result: %s\n", - handle->module ? "Success" : "Failed"); -#endif - - if (handle->module != 0) - { - if (advise) - { - handle->info.is_resident = advise->is_resident; - handle->info.is_symglobal = advise->is_symglobal; - handle->info.is_symlocal = advise->is_symlocal; - } - break; - } - } - while (!vtable && (loader = lt_dlloader_next (loader))); - - /* If VTABLE was given but couldn't open the module, or VTABLE wasn't - given but we exhausted all loaders without opening the module, bail - out! */ - if ((vtable && !handle->module) - || (!vtable && !loader)) - { - FREE (handle->info.filename); - ++errors; - goto done; - } - - handle->vtable = loader_vtable; - } - - LT__SETERRORSTR (saved_error); - - done: - return errors; -} - - -static int -tryall_dlopen_module (lt_dlhandle *handle, const char *prefix, - const char *dirname, const char *dlname, - lt_dladvise advise) -{ - int error = 0; - char *filename = 0; - size_t filename_len = 0; - size_t dirname_len = LT_STRLEN (dirname); - - assert (handle); - assert (dirname); - assert (dlname); -#if defined(LT_DIRSEP_CHAR) - /* Only canonicalized names (i.e. with DIRSEP chars already converted) - should make it into this function: */ - assert (strchr (dirname, LT_DIRSEP_CHAR) == 0); -#endif - - if (dirname_len > 0) - if (dirname[dirname_len -1] == '/') - --dirname_len; - filename_len = dirname_len + 1 + LT_STRLEN (dlname); - - /* Allocate memory, and combine DIRNAME and MODULENAME into it. - The PREFIX (if any) is handled below. */ - filename = MALLOC (char, filename_len + 1); - if (!filename) - return 1; - - sprintf (filename, "%.*s/%s", (int) dirname_len, dirname, dlname); - - /* Now that we have combined DIRNAME and MODULENAME, if there is - also a PREFIX to contend with, simply recurse with the arguments - shuffled. Otherwise, attempt to open FILENAME as a module. */ - if (prefix) - { - error += tryall_dlopen_module (handle, (const char *) 0, - prefix, filename, advise); - } - else if (tryall_dlopen (handle, filename, advise, 0) != 0) - { - ++error; - } - - FREE (filename); - return error; -} - -static int -find_module (lt_dlhandle *handle, const char *dir, const char *libdir, - const char *dlname, const char *old_name, int installed, - lt_dladvise advise) -{ - /* Try to open the old library first; if it was dlpreopened, - we want the preopened version of it, even if a dlopenable - module is available. */ - if (old_name && tryall_dlopen (handle, old_name, advise, 0) == 0) - { - return 0; - } - - /* Try to open the dynamic library. */ - if (dlname) - { - /* try to open the installed module */ - if (installed && libdir) - { - if (tryall_dlopen_module (handle, (const char *) 0, - libdir, dlname, advise) == 0) - return 0; - } - - /* try to open the not-installed module */ - if (!installed) - { - if (tryall_dlopen_module (handle, dir, objdir, - dlname, advise) == 0) - return 0; - } - - /* maybe it was moved to another directory */ - { - if (dir && (tryall_dlopen_module (handle, (const char *) 0, - dir, dlname, advise) == 0)) - return 0; - } - } - - return 1; -} - - -static int -canonicalize_path (const char *path, char **pcanonical) -{ - char *canonical = 0; - - assert (path && *path); - assert (pcanonical); - - canonical = MALLOC (char, 1+ LT_STRLEN (path)); - if (!canonical) - return 1; - - { - size_t dest = 0; - size_t src; - for (src = 0; path[src] != LT_EOS_CHAR; ++src) - { - /* Path separators are not copied to the beginning or end of - the destination, or if another separator would follow - immediately. */ - if (path[src] == LT_PATHSEP_CHAR) - { - if ((dest == 0) - || (path[1+ src] == LT_PATHSEP_CHAR) - || (path[1+ src] == LT_EOS_CHAR)) - continue; - } - - /* Anything other than a directory separator is copied verbatim. */ - if ((path[src] != '/') -#if defined(LT_DIRSEP_CHAR) - && (path[src] != LT_DIRSEP_CHAR) -#endif - ) - { - canonical[dest++] = path[src]; - } - /* Directory separators are converted and copied only if they are - not at the end of a path -- i.e. before a path separator or - NULL terminator. */ - else if ((path[1+ src] != LT_PATHSEP_CHAR) - && (path[1+ src] != LT_EOS_CHAR) -#if defined(LT_DIRSEP_CHAR) - && (path[1+ src] != LT_DIRSEP_CHAR) -#endif - && (path[1+ src] != '/')) - { - canonical[dest++] = '/'; - } - } - - /* Add an end-of-string marker at the end. */ - canonical[dest] = LT_EOS_CHAR; - } - - /* Assign new value. */ - *pcanonical = canonical; - - return 0; -} - -static int -argzize_path (const char *path, char **pargz, size_t *pargz_len) -{ - error_t error; - - assert (path); - assert (pargz); - assert (pargz_len); - - if ((error = argz_create_sep (path, LT_PATHSEP_CHAR, pargz, pargz_len))) - { - switch (error) - { - case ENOMEM: - LT__SETERROR (NO_MEMORY); - break; - default: - LT__SETERROR (UNKNOWN); - break; - } - - return 1; - } - - return 0; -} - -/* Repeatedly call FUNC with each LT_PATHSEP_CHAR delimited element - of SEARCH_PATH and references to DATA1 and DATA2, until FUNC returns - non-zero or all elements are exhausted. If BASE_NAME is non-NULL, - it is appended to each SEARCH_PATH element before FUNC is called. */ -static int -foreach_dirinpath (const char *search_path, const char *base_name, - foreach_callback_func *func, void *data1, void *data2) -{ - int result = 0; - size_t filenamesize = 0; - size_t lenbase = LT_STRLEN (base_name); - size_t argz_len = 0; - char *argz = 0; - char *filename = 0; - char *canonical = 0; - - if (!search_path || !*search_path) - { - LT__SETERROR (FILE_NOT_FOUND); - goto cleanup; - } - - if (canonicalize_path (search_path, &canonical) != 0) - goto cleanup; - - if (argzize_path (canonical, &argz, &argz_len) != 0) - goto cleanup; - - { - char *dir_name = 0; - while ((dir_name = argz_next (argz, argz_len, dir_name))) - { - size_t lendir = LT_STRLEN (dir_name); - - if (1+ lendir + lenbase >= filenamesize) - { - FREE (filename); - filenamesize = 1+ lendir + 1+ lenbase; /* "/d" + '/' + "f" + '\0' */ - filename = MALLOC (char, filenamesize); - if (!filename) - goto cleanup; - } - - assert (filenamesize > lendir); - strcpy (filename, dir_name); - - if (base_name && *base_name) - { - if (filename[lendir -1] != '/') - filename[lendir++] = '/'; - strcpy (filename +lendir, base_name); - } - - if ((result = (*func) (filename, data1, data2))) - { - break; - } - } - } - - cleanup: - FREE (argz); - FREE (canonical); - FREE (filename); - - return result; -} - -/* If FILEPATH can be opened, store the name of the directory component - in DATA1, and the opened FILE* structure address in DATA2. Otherwise - DATA1 is unchanged, but DATA2 is set to a pointer to NULL. */ -static int -find_file_callback (char *filename, void *data1, void *data2) -{ - char **pdir = (char **) data1; - FILE **pfile = (FILE **) data2; - int is_done = 0; - - assert (filename && *filename); - assert (pdir); - assert (pfile); - - if ((*pfile = fopen (filename, LT_READTEXT_MODE))) - { - char *dirend = strrchr (filename, '/'); - - if (dirend > filename) - *dirend = LT_EOS_CHAR; - - FREE (*pdir); - *pdir = lt__strdup (filename); - is_done = (*pdir == 0) ? -1 : 1; - } - - return is_done; -} - -static FILE * -find_file (const char *search_path, const char *base_name, char **pdir) -{ - FILE *file = 0; - - foreach_dirinpath (search_path, base_name, find_file_callback, pdir, &file); - - return file; -} - -static int -find_handle_callback (char *filename, void *data, void *data2) -{ - lt_dlhandle *phandle = (lt_dlhandle *) data; - int notfound = access (filename, R_OK); - lt_dladvise advise = (lt_dladvise) data2; - - /* Bail out if file cannot be read... */ - if (notfound) - return 0; - - /* Try to dlopen the file, but do not continue searching in any - case. */ - if (tryall_dlopen (phandle, filename, advise, 0) != 0) - *phandle = 0; - - return 1; -} - -/* If HANDLE was found return it, otherwise return 0. If HANDLE was - found but could not be opened, *HANDLE will be set to 0. */ -static lt_dlhandle * -find_handle (const char *search_path, const char *base_name, - lt_dlhandle *phandle, lt_dladvise advise) -{ - if (!search_path) - return 0; - - if (!foreach_dirinpath (search_path, base_name, find_handle_callback, - phandle, advise)) - return 0; - - return phandle; -} - -#if !defined(LTDL_DLOPEN_DEPLIBS) -static int -load_deplibs (lt_dlhandle handle, char * LT__UNUSED deplibs) -{ - handle->depcount = 0; - return 0; -} - -#else /* defined(LTDL_DLOPEN_DEPLIBS) */ -static int -load_deplibs (lt_dlhandle handle, char *deplibs) -{ - char *p, *save_search_path = 0; - int depcount = 0; - int i; - char **names = 0; - int errors = 0; - - handle->depcount = 0; - - if (!deplibs) - { - return errors; - } - ++errors; - - if (user_search_path) - { - save_search_path = lt__strdup (user_search_path); - if (!save_search_path) - goto cleanup; - } - - /* extract search paths and count deplibs */ - p = deplibs; - while (*p) - { - if (!isspace ((unsigned char) *p)) - { - char *end = p+1; - while (*end && !isspace((unsigned char) *end)) - { - ++end; - } - - if (strncmp(p, "-L", 2) == 0 || strncmp(p, "-R", 2) == 0) - { - char save = *end; - *end = 0; /* set a temporary string terminator */ - if (lt_dladdsearchdir(p+2)) - { - goto cleanup; - } - *end = save; - } - else - { - ++depcount; - } - - p = end; - } - else - { - ++p; - } - } - - - if (!depcount) - { - errors = 0; - goto cleanup; - } - - names = MALLOC (char *, depcount); - if (!names) - goto cleanup; - - /* now only extract the actual deplibs */ - depcount = 0; - p = deplibs; - while (*p) - { - if (isspace ((unsigned char) *p)) - { - ++p; - } - else - { - char *end = p+1; - while (*end && !isspace ((unsigned char) *end)) - { - ++end; - } - - if (strncmp(p, "-L", 2) != 0 && strncmp(p, "-R", 2) != 0) - { - char *name; - char save = *end; - *end = 0; /* set a temporary string terminator */ - if (strncmp(p, "-l", 2) == 0) - { - size_t name_len = 3+ /* "lib" */ LT_STRLEN (p + 2); - name = MALLOC (char, 1+ name_len); - if (name) - sprintf (name, "lib%s", p+2); - } - else - name = lt__strdup(p); - - if (!name) - goto cleanup_names; - - names[depcount++] = name; - *end = save; - } - p = end; - } - } - - /* load the deplibs (in reverse order) - At this stage, don't worry if the deplibs do not load correctly, - they may already be statically linked into the loading application - for instance. There will be a more enlightening error message - later on if the loaded module cannot resolve all of its symbols. */ - if (depcount) - { - lt_dlhandle cur = handle; - int j = 0; - - cur->deplibs = MALLOC (lt_dlhandle, depcount); - if (!cur->deplibs) - goto cleanup_names; - - for (i = 0; i < depcount; ++i) - { - cur->deplibs[j] = lt_dlopenext(names[depcount-1-i]); - if (cur->deplibs[j]) - { - ++j; - } - } - - cur->depcount = j; /* Number of successfully loaded deplibs */ - errors = 0; - } - - cleanup_names: - for (i = 0; i < depcount; ++i) - { - FREE (names[i]); - } - - cleanup: - FREE (names); - /* restore the old search path */ - if (save_search_path) { - MEMREASSIGN (user_search_path, save_search_path); - } - - return errors; -} -#endif /* defined(LTDL_DLOPEN_DEPLIBS) */ - -static int -unload_deplibs (lt_dlhandle handle) -{ - int i; - int errors = 0; - lt_dlhandle cur = handle; - - if (cur->depcount) - { - for (i = 0; i < cur->depcount; ++i) - { - if (!LT_DLIS_RESIDENT (cur->deplibs[i])) - { - errors += lt_dlclose (cur->deplibs[i]); - } - } - FREE (cur->deplibs); - } - - return errors; -} - -static int -trim (char **dest, const char *str) -{ - /* remove the leading and trailing "'" from str - and store the result in dest */ - const char *end = strrchr (str, '\''); - size_t len = LT_STRLEN (str); - char *tmp; - - FREE (*dest); - - if (!end) - return 1; - - if (len > 3 && str[0] == '\'') - { - tmp = MALLOC (char, end - str); - if (!tmp) - return 1; - - memcpy(tmp, &str[1], (end - str) - 1); - tmp[(end - str) - 1] = LT_EOS_CHAR; - *dest = tmp; - } - else - { - *dest = 0; - } - - return 0; -} - -/* Read the .la file FILE. */ -static int -parse_dotla_file(FILE *file, char **dlname, char **libdir, char **deplibs, - char **old_name, int *installed) -{ - int errors = 0; - size_t line_len = LT_FILENAME_MAX; - char * line = MALLOC (char, line_len); - - if (!line) - { - LT__SETERROR (FILE_NOT_FOUND); - return 1; - } - - while (!feof (file)) - { - line[line_len-2] = '\0'; - if (!fgets (line, (int) line_len, file)) - { - break; - } - - /* Handle the case where we occasionally need to read a line - that is longer than the initial buffer size. - Behave even if the file contains NUL bytes due to corruption. */ - while (line[line_len-2] != '\0' && line[line_len-2] != '\n' && !feof (file)) - { - line = REALLOC (char, line, line_len *2); - if (!line) - { - ++errors; - goto cleanup; - } - line[line_len * 2 - 2] = '\0'; - if (!fgets (&line[line_len -1], (int) line_len +1, file)) - { - break; - } - line_len *= 2; - } - - if (line[0] == '\n' || line[0] == '#') - { - continue; - } - -#undef STR_DLNAME -#define STR_DLNAME "dlname=" - if (strncmp (line, STR_DLNAME, sizeof (STR_DLNAME) - 1) == 0) - { - errors += trim (dlname, &line[sizeof (STR_DLNAME) - 1]); - } - -#undef STR_OLD_LIBRARY -#define STR_OLD_LIBRARY "old_library=" - else if (strncmp (line, STR_OLD_LIBRARY, - sizeof (STR_OLD_LIBRARY) - 1) == 0) - { - errors += trim (old_name, &line[sizeof (STR_OLD_LIBRARY) - 1]); - } -#undef STR_LIBDIR -#define STR_LIBDIR "libdir=" - else if (strncmp (line, STR_LIBDIR, sizeof (STR_LIBDIR) - 1) == 0) - { - errors += trim (libdir, &line[sizeof(STR_LIBDIR) - 1]); - } - -#undef STR_DL_DEPLIBS -#define STR_DL_DEPLIBS "dependency_libs=" - else if (strncmp (line, STR_DL_DEPLIBS, - sizeof (STR_DL_DEPLIBS) - 1) == 0) - { - errors += trim (deplibs, &line[sizeof (STR_DL_DEPLIBS) - 1]); - } - else if (streq (line, "installed=yes\n")) - { - *installed = 1; - } - else if (streq (line, "installed=no\n")) - { - *installed = 0; - } - -#undef STR_LIBRARY_NAMES -#define STR_LIBRARY_NAMES "library_names=" - else if (!*dlname && strncmp (line, STR_LIBRARY_NAMES, - sizeof (STR_LIBRARY_NAMES) - 1) == 0) - { - char *last_libname; - errors += trim (dlname, &line[sizeof (STR_LIBRARY_NAMES) - 1]); - if (!errors - && *dlname - && (last_libname = strrchr (*dlname, ' ')) != 0) - { - last_libname = lt__strdup (last_libname + 1); - if (!last_libname) - { - ++errors; - goto cleanup; - } - MEMREASSIGN (*dlname, last_libname); - } - } - - if (errors) - break; - } -cleanup: - FREE (line); - return errors; -} - - -/* Try to open FILENAME as a module. */ -static int -try_dlopen (lt_dlhandle *phandle, const char *filename, const char *ext, - lt_dladvise advise) -{ - const char * saved_error = 0; - char * canonical = 0; - char * base_name = 0; - char * dir = 0; - char * name = 0; - char * attempt = 0; - int errors = 0; - lt_dlhandle newhandle; - - assert (phandle); - assert (*phandle == 0); - -#ifdef LT_DEBUG_LOADERS - fprintf (stderr, "try_dlopen (%s, %s)\n", - filename ? filename : "(null)", - ext ? ext : "(null)"); -#endif - - LT__GETERROR (saved_error); - - /* dlopen self? */ - if (!filename) - { - *phandle = (lt_dlhandle) lt__zalloc (sizeof (struct lt__handle)); - if (*phandle == 0) - return 1; - - newhandle = *phandle; - - /* lt_dlclose()ing yourself is very bad! Disallow it. */ - newhandle->info.is_resident = 1; - - if (tryall_dlopen (&newhandle, 0, advise, 0) != 0) - { - FREE (*phandle); - return 1; - } - - goto register_handle; - } - - assert (filename && *filename); - - if (ext) - { - attempt = MALLOC (char, LT_STRLEN (filename) + LT_STRLEN (ext) + 1); - if (!attempt) - return 1; - - sprintf(attempt, "%s%s", filename, ext); - } - else - { - attempt = lt__strdup (filename); - if (!attempt) - return 1; - } - - /* Doing this immediately allows internal functions to safely - assume only canonicalized paths are passed. */ - if (canonicalize_path (attempt, &canonical) != 0) - { - ++errors; - goto cleanup; - } - - /* If the canonical module name is a path (relative or absolute) - then split it into a directory part and a name part. */ - base_name = strrchr (canonical, '/'); - if (base_name) - { - size_t dirlen = (1+ base_name) - canonical; - - dir = MALLOC (char, 1+ dirlen); - if (!dir) - { - ++errors; - goto cleanup; - } - - strncpy (dir, canonical, dirlen); - dir[dirlen] = LT_EOS_CHAR; - - ++base_name; - } - else - MEMREASSIGN (base_name, canonical); - - assert (base_name && *base_name); - - ext = strrchr (base_name, '.'); - if (!ext) - { - ext = base_name + LT_STRLEN (base_name); - } - - /* extract the module name from the file name */ - name = MALLOC (char, ext - base_name + 1); - if (!name) - { - ++errors; - goto cleanup; - } - - /* canonicalize the module name */ - { - int i; - for (i = 0; i < ext - base_name; ++i) - { - if (isalnum ((unsigned char)(base_name[i]))) - { - name[i] = base_name[i]; - } - else - { - name[i] = '_'; - } - } - name[ext - base_name] = LT_EOS_CHAR; - } - - /* Before trawling through the filesystem in search of a module, - check whether we are opening a preloaded module. */ - if (!dir) - { - const lt_dlvtable *vtable = lt_dlloader_find ("lt_preopen"); - - if (vtable) - { - *phandle = (lt_dlhandle) lt__zalloc (sizeof (struct lt__handle)); - - if (*phandle == NULL) - { - ++errors; - goto cleanup; - } - newhandle = *phandle; - - if (tryall_dlopen (&newhandle, attempt, advise, vtable) == 0) - { - goto register_handle; - } - - /* If we're still here, there was no matching preloaded module, - so put things back as we found them, and continue searching. */ - FREE (*phandle); - newhandle = NULL; - } - } - - /* Check whether we are opening a libtool module (.la extension). */ - if (ext && streq (ext, archive_ext)) - { - /* this seems to be a libtool module */ - FILE * file = 0; - char * dlname = 0; - char * old_name = 0; - char * libdir = 0; - char * deplibs = 0; - - /* if we can't find the installed flag, it is probably an - installed libtool archive, produced with an old version - of libtool */ - int installed = 1; - - /* Now try to open the .la file. If there is no directory name - component, try to find it first in user_search_path and then other - prescribed paths. Otherwise (or in any case if the module was not - yet found) try opening just the module name as passed. */ - if (!dir) - { - const char *search_path = user_search_path; - - if (search_path) - file = find_file (user_search_path, base_name, &dir); - - if (!file) - { - search_path = getenv (LTDL_SEARCHPATH_VAR); - if (search_path) - file = find_file (search_path, base_name, &dir); - } - -#if defined(LT_MODULE_PATH_VAR) - if (!file) - { - search_path = getenv (LT_MODULE_PATH_VAR); - if (search_path) - file = find_file (search_path, base_name, &dir); - } -#endif -#if defined(LT_DLSEARCH_PATH) - if (!file && *sys_dlsearch_path) - { - file = find_file (sys_dlsearch_path, base_name, &dir); - } -#endif - } - if (!file) - { - file = fopen (attempt, LT_READTEXT_MODE); - } - - /* If we didn't find the file by now, it really isn't there. Set - the status flag, and bail out. */ - if (!file) - { - LT__SETERROR (FILE_NOT_FOUND); - ++errors; - goto cleanup; - } - - /* read the .la file */ - if (parse_dotla_file(file, &dlname, &libdir, &deplibs, - &old_name, &installed) != 0) - ++errors; - - fclose (file); - - /* allocate the handle */ - *phandle = (lt_dlhandle) lt__zalloc (sizeof (struct lt__handle)); - if (*phandle == 0) - ++errors; - - if (errors) - { - FREE (dlname); - FREE (old_name); - FREE (libdir); - FREE (deplibs); - FREE (*phandle); - goto cleanup; - } - - assert (*phandle); - - if (load_deplibs (*phandle, deplibs) == 0) - { - newhandle = *phandle; - /* find_module may replace newhandle */ - if (find_module (&newhandle, dir, libdir, dlname, old_name, - installed, advise)) - { - unload_deplibs (*phandle); - ++errors; - } - } - else - { - ++errors; - } - - FREE (dlname); - FREE (old_name); - FREE (libdir); - FREE (deplibs); - - if (errors) - { - FREE (*phandle); - goto cleanup; - } - - if (*phandle != newhandle) - { - unload_deplibs (*phandle); - } - } - else - { - /* not a libtool module */ - *phandle = (lt_dlhandle) lt__zalloc (sizeof (struct lt__handle)); - if (*phandle == 0) - { - ++errors; - goto cleanup; - } - - newhandle = *phandle; - - /* If the module has no directory name component, try to find it - first in user_search_path and then other prescribed paths. - Otherwise (or in any case if the module was not yet found) try - opening just the module name as passed. */ - if ((dir || (!find_handle (user_search_path, base_name, - &newhandle, advise) - && !find_handle (getenv (LTDL_SEARCHPATH_VAR), base_name, - &newhandle, advise) -#if defined(LT_MODULE_PATH_VAR) - && !find_handle (getenv (LT_MODULE_PATH_VAR), base_name, - &newhandle, advise) -#endif -#if defined(LT_DLSEARCH_PATH) - && !find_handle (sys_dlsearch_path, base_name, - &newhandle, advise) -#endif - ))) - { - if (tryall_dlopen (&newhandle, attempt, advise, 0) != 0) - { - newhandle = NULL; - } - } - - if (!newhandle) - { - FREE (*phandle); - ++errors; - goto cleanup; - } - } - - register_handle: - MEMREASSIGN (*phandle, newhandle); - - if ((*phandle)->info.ref_count == 0) - { - (*phandle)->info.ref_count = 1; - MEMREASSIGN ((*phandle)->info.name, name); - - (*phandle)->next = handles; - handles = *phandle; - } - - LT__SETERRORSTR (saved_error); - - cleanup: - FREE (dir); - FREE (attempt); - FREE (name); - if (!canonical) /* was MEMREASSIGNed */ - FREE (base_name); - FREE (canonical); - - return errors; -} - - -/* If the last error messge store was `FILE_NOT_FOUND', then return - non-zero. */ -static int -file_not_found (void) -{ - const char *error = 0; - - LT__GETERROR (error); - if (error == LT__STRERROR (FILE_NOT_FOUND)) - return 1; - - return 0; -} - - -/* Unless FILENAME already bears a suitable library extension, then - return 0. */ -static int -has_library_ext (const char *filename) -{ - char * ext = 0; - - assert (filename); - - ext = strrchr (filename, '.'); - - if (ext && ((streq (ext, archive_ext)) -#if defined(LT_MODULE_EXT) - || (streq (ext, shlib_ext)) -#endif - )) - { - return 1; - } - - return 0; -} - - -/* Initialise and configure a user lt_dladvise opaque object. */ - -int -lt_dladvise_init (lt_dladvise *padvise) -{ - lt_dladvise advise = (lt_dladvise) lt__zalloc (sizeof (struct lt__advise)); - *padvise = advise; - return (advise ? 0 : 1); -} - -int -lt_dladvise_destroy (lt_dladvise *padvise) -{ - if (padvise) - FREE(*padvise); - return 0; -} - -int -lt_dladvise_ext (lt_dladvise *padvise) -{ - assert (padvise && *padvise); - (*padvise)->try_ext = 1; - return 0; -} - -int -lt_dladvise_resident (lt_dladvise *padvise) -{ - assert (padvise && *padvise); - (*padvise)->is_resident = 1; - return 0; -} - -int -lt_dladvise_local (lt_dladvise *padvise) -{ - assert (padvise && *padvise); - (*padvise)->is_symlocal = 1; - return 0; -} - -int -lt_dladvise_global (lt_dladvise *padvise) -{ - assert (padvise && *padvise); - (*padvise)->is_symglobal = 1; - return 0; -} - -/* Libtool-1.5.x interface for loading a new module named FILENAME. */ -lt_dlhandle -lt_dlopen (const char *filename) -{ - return lt_dlopenadvise (filename, NULL); -} - - -/* If FILENAME has an ARCHIVE_EXT or MODULE_EXT extension, try to - open the FILENAME as passed. Otherwise try appending ARCHIVE_EXT, - and if a file is still not found try again with MODULE_EXT appended - instead. */ -lt_dlhandle -lt_dlopenext (const char *filename) -{ - lt_dlhandle handle = 0; - lt_dladvise advise; - - if (!lt_dladvise_init (&advise) && !lt_dladvise_ext (&advise)) - handle = lt_dlopenadvise (filename, advise); - - lt_dladvise_destroy (&advise); - return handle; -} - - -lt_dlhandle -lt_dlopenadvise (const char *filename, lt_dladvise advise) -{ - lt_dlhandle handle = 0; - int errors = 0; - - /* Can't have symbols hidden and visible at the same time! */ - if (advise && advise->is_symlocal && advise->is_symglobal) - { - LT__SETERROR (CONFLICTING_FLAGS); - return 0; - } - - if (!filename - || !advise - || !advise->try_ext - || has_library_ext (filename)) - { - /* Just incase we missed a code path in try_dlopen() that reports - an error, but forgot to reset handle... */ - if (try_dlopen (&handle, filename, NULL, advise) != 0) - return 0; - - return handle; - } - else if (filename && *filename) - { - - /* First try appending ARCHIVE_EXT. */ - errors += try_dlopen (&handle, filename, archive_ext, advise); - - /* If we found FILENAME, stop searching -- whether we were able to - load the file as a module or not. If the file exists but loading - failed, it is better to return an error message here than to - report FILE_NOT_FOUND when the alternatives (foo.so etc) are not - in the module search path. */ - if (handle || ((errors > 0) && !file_not_found ())) - return handle; - -#if defined(LT_MODULE_EXT) - /* Try appending SHLIB_EXT. */ - errors = try_dlopen (&handle, filename, shlib_ext, advise); - - /* As before, if the file was found but loading failed, return now - with the current error message. */ - if (handle || ((errors > 0) && !file_not_found ())) - return handle; -#endif - } - - /* Still here? Then we really did fail to locate any of the file - names we tried. */ - LT__SETERROR (FILE_NOT_FOUND); - return 0; -} - - -static int -lt_argz_insert (char **pargz, size_t *pargz_len, char *before, - const char *entry) -{ - error_t error; - - /* Prior to Sep 8, 2005, newlib had a bug where argz_insert(pargz, - pargz_len, NULL, entry) failed with EINVAL. */ - if (before) - error = argz_insert (pargz, pargz_len, before, entry); - else - error = argz_append (pargz, pargz_len, entry, 1 + strlen (entry)); - - if (error) - { - switch (error) - { - case ENOMEM: - LT__SETERROR (NO_MEMORY); - break; - default: - LT__SETERROR (UNKNOWN); - break; - } - return 1; - } - - return 0; -} - -static int -lt_argz_insertinorder (char **pargz, size_t *pargz_len, const char *entry) -{ - char *before = 0; - - assert (pargz); - assert (pargz_len); - assert (entry && *entry); - - if (*pargz) - while ((before = argz_next (*pargz, *pargz_len, before))) - { - int cmp = strcmp (entry, before); - - if (cmp < 0) break; - if (cmp == 0) return 0; /* No duplicates! */ - } - - return lt_argz_insert (pargz, pargz_len, before, entry); -} - -static int -lt_argz_insertdir (char **pargz, size_t *pargz_len, const char *dirnam, - struct dirent *dp) -{ - char *buf = 0; - size_t buf_len = 0; - char *end = 0; - size_t end_offset = 0; - size_t dir_len = 0; - int errors = 0; - - assert (pargz); - assert (pargz_len); - assert (dp); - - dir_len = LT_STRLEN (dirnam); - end = dp->d_name + D_NAMLEN(dp); - - /* Ignore version numbers. */ - { - char *p; - for (p = end; p -1 > dp->d_name; --p) - if (strchr (".0123456789", p[-1]) == 0) - break; - - if (*p == '.') - end = p; - } - - /* Ignore filename extension. */ - { - char *p; - for (p = end -1; p > dp->d_name; --p) - if (*p == '.') - { - end = p; - break; - } - } - - /* Prepend the directory name. */ - end_offset = end - dp->d_name; - buf_len = dir_len + 1+ end_offset; - buf = MALLOC (char, 1+ buf_len); - if (!buf) - return ++errors; - - assert (buf); - - strcpy (buf, dirnam); - strcat (buf, "/"); - strncat (buf, dp->d_name, end_offset); - buf[buf_len] = LT_EOS_CHAR; - - /* Try to insert (in order) into ARGZ/ARGZ_LEN. */ - if (lt_argz_insertinorder (pargz, pargz_len, buf) != 0) - ++errors; - - FREE (buf); - - return errors; -} - -static int -list_files_by_dir (const char *dirnam, char **pargz, size_t *pargz_len) -{ - DIR *dirp = 0; - int errors = 0; - - assert (dirnam && *dirnam); - assert (pargz); - assert (pargz_len); - assert (dirnam[LT_STRLEN(dirnam) -1] != '/'); - - dirp = opendir (dirnam); - if (dirp) - { - struct dirent *dp = 0; - - while ((dp = readdir (dirp))) - if (dp->d_name[0] != '.') - if (lt_argz_insertdir (pargz, pargz_len, dirnam, dp)) - { - ++errors; - break; - } - - closedir (dirp); - } - else - ++errors; - - return errors; -} - - -/* If there are any files in DIRNAME, call the function passed in - DATA1 (with the name of each file and DATA2 as arguments). */ -static int -foreachfile_callback (char *dirname, void *data1, void *data2) -{ - file_worker_func *func = *(file_worker_func **) data1; - - int is_done = 0; - char *argz = 0; - size_t argz_len = 0; - - if (list_files_by_dir (dirname, &argz, &argz_len) != 0) - goto cleanup; - if (!argz) - goto cleanup; - - { - char *filename = 0; - while ((filename = argz_next (argz, argz_len, filename))) - if ((is_done = (*func) (filename, data2))) - break; - } - - cleanup: - FREE (argz); - - return is_done; -} - - -/* Call FUNC for each unique extensionless file in SEARCH_PATH, along - with DATA. The filenames passed to FUNC would be suitable for - passing to lt_dlopenext. The extensions are stripped so that - individual modules do not generate several entries (e.g. libfoo.la, - libfoo.so, libfoo.so.1, libfoo.so.1.0.0). If SEARCH_PATH is NULL, - then the same directories that lt_dlopen would search are examined. */ -int -lt_dlforeachfile (const char *search_path, - int (*func) (const char *filename, void *data), - void *data) -{ - int is_done = 0; - file_worker_func **fpptr = &func; - - if (search_path) - { - /* If a specific path was passed, search only the directories - listed in it. */ - is_done = foreach_dirinpath (search_path, 0, - foreachfile_callback, fpptr, data); - } - else - { - /* Otherwise search the default paths. */ - is_done = foreach_dirinpath (user_search_path, 0, - foreachfile_callback, fpptr, data); - if (!is_done) - { - is_done = foreach_dirinpath (getenv(LTDL_SEARCHPATH_VAR), 0, - foreachfile_callback, fpptr, data); - } - -#if defined(LT_MODULE_PATH_VAR) - if (!is_done) - { - is_done = foreach_dirinpath (getenv(LT_MODULE_PATH_VAR), 0, - foreachfile_callback, fpptr, data); - } -#endif -#if defined(LT_DLSEARCH_PATH) - if (!is_done && *sys_dlsearch_path) - { - is_done = foreach_dirinpath (sys_dlsearch_path, 0, - foreachfile_callback, fpptr, data); - } -#endif - } - - return is_done; -} - -int -lt_dlclose (lt_dlhandle handle) -{ - lt_dlhandle cur, last; - int errors = 0; - - /* check whether the handle is valid */ - last = cur = handles; - while (cur && handle != cur) - { - last = cur; - cur = cur->next; - } - - if (!cur) - { - LT__SETERROR (INVALID_HANDLE); - ++errors; - goto done; - } - - cur = handle; - cur->info.ref_count--; - - /* Note that even with resident modules, we must track the ref_count - correctly incase the user decides to reset the residency flag - later (even though the API makes no provision for that at the - moment). */ - if (cur->info.ref_count <= 0 && !LT_DLIS_RESIDENT (cur)) - { - lt_user_data data = cur->vtable->dlloader_data; - - if (cur != handles) - { - last->next = cur->next; - } - else - { - handles = cur->next; - } - - errors += cur->vtable->module_close (data, cur->module); - errors += unload_deplibs (handle); - - /* It is up to the callers to free the data itself. */ - FREE (cur->interface_data); - - FREE (cur->info.filename); - FREE (cur->info.name); - FREE (cur); - - goto done; - } - - if (LT_DLIS_RESIDENT (handle)) - { - LT__SETERROR (CLOSE_RESIDENT_MODULE); - ++errors; - } - - done: - return errors; -} - -void * -lt_dlsym (lt_dlhandle place, const char *symbol) -{ - size_t lensym; - char lsym[LT_SYMBOL_LENGTH]; - char *sym; - void *address; - lt_user_data data; - lt_dlhandle handle; - - if (!place) - { - LT__SETERROR (INVALID_HANDLE); - return 0; - } - - handle = place; - - if (!symbol) - { - LT__SETERROR (SYMBOL_NOT_FOUND); - return 0; - } - - lensym = LT_STRLEN (symbol) + LT_STRLEN (handle->vtable->sym_prefix) - + LT_STRLEN (handle->info.name); - - if (lensym + LT_SYMBOL_OVERHEAD < LT_SYMBOL_LENGTH) - { - sym = lsym; - } - else - { - sym = MALLOC (char, lensym + LT_SYMBOL_OVERHEAD + 1); - if (!sym) - { - LT__SETERROR (BUFFER_OVERFLOW); - return 0; - } - } - - data = handle->vtable->dlloader_data; - if (handle->info.name) - { - const char *saved_error; - - LT__GETERROR (saved_error); - - /* this is a libtool module */ - if (handle->vtable->sym_prefix) - { - strcpy(sym, handle->vtable->sym_prefix); - strcat(sym, handle->info.name); - } - else - { - strcpy(sym, handle->info.name); - } - - strcat(sym, "_LTX_"); - strcat(sym, symbol); - - /* try "modulename_LTX_symbol" */ - address = handle->vtable->find_sym (data, handle->module, sym); - if (address) - { - if (sym != lsym) - { - FREE (sym); - } - return address; - } - LT__SETERRORSTR (saved_error); - } - - /* otherwise try "symbol" */ - if (handle->vtable->sym_prefix) - { - strcpy(sym, handle->vtable->sym_prefix); - strcat(sym, symbol); - } - else - { - strcpy(sym, symbol); - } - - address = handle->vtable->find_sym (data, handle->module, sym); - if (sym != lsym) - { - FREE (sym); - } - - return address; -} - -const char * -lt_dlerror (void) -{ - const char *error; - - LT__GETERROR (error); - LT__SETERRORSTR (0); - - return error ? error : NULL; -} - -static int -lt_dlpath_insertdir (char **ppath, char *before, const char *dir) -{ - int errors = 0; - char *canonical = 0; - char *argz = 0; - size_t argz_len = 0; - - assert (ppath); - assert (dir && *dir); - - if (canonicalize_path (dir, &canonical) != 0) - { - ++errors; - goto cleanup; - } - - assert (canonical && *canonical); - - /* If *PPATH is empty, set it to DIR. */ - if (*ppath == 0) - { - assert (!before); /* BEFORE cannot be set without PPATH. */ - assert (dir); /* Without DIR, don't call this function! */ - - *ppath = lt__strdup (dir); - if (*ppath == 0) - ++errors; - - goto cleanup; - } - - assert (ppath && *ppath); - - if (argzize_path (*ppath, &argz, &argz_len) != 0) - { - ++errors; - goto cleanup; - } - - /* Convert BEFORE into an equivalent offset into ARGZ. This only works - if *PPATH is already canonicalized, and hence does not change length - with respect to ARGZ. We canonicalize each entry as it is added to - the search path, and don't call this function with (uncanonicalized) - user paths, so this is a fair assumption. */ - if (before) - { - assert (*ppath <= before); - assert ((int) (before - *ppath) <= (int) strlen (*ppath)); - - before = before - *ppath + argz; - } - - if (lt_argz_insert (&argz, &argz_len, before, dir) != 0) - { - ++errors; - goto cleanup; - } - - argz_stringify (argz, argz_len, LT_PATHSEP_CHAR); - MEMREASSIGN(*ppath, argz); - - cleanup: - FREE (argz); - FREE (canonical); - - return errors; -} - -int -lt_dladdsearchdir (const char *search_dir) -{ - int errors = 0; - - if (search_dir && *search_dir) - { - if (lt_dlpath_insertdir (&user_search_path, 0, search_dir) != 0) - ++errors; - } - - return errors; -} - -int -lt_dlinsertsearchdir (const char *before, const char *search_dir) -{ - int errors = 0; - - if (before) - { - if ((before < user_search_path) - || (before >= user_search_path + LT_STRLEN (user_search_path))) - { - LT__SETERROR (INVALID_POSITION); - return 1; - } - } - - if (search_dir && *search_dir) - { - if (lt_dlpath_insertdir (&user_search_path, - (char *) before, search_dir) != 0) - { - ++errors; - } - } - - return errors; -} - -int -lt_dlsetsearchpath (const char *search_path) -{ - int errors = 0; - - FREE (user_search_path); - - if (!search_path || !LT_STRLEN (search_path)) - { - return errors; - } - - if (canonicalize_path (search_path, &user_search_path) != 0) - ++errors; - - return errors; -} - -const char * -lt_dlgetsearchpath (void) -{ - const char *saved_path; - - saved_path = user_search_path; - - return saved_path; -} - -int -lt_dlmakeresident (lt_dlhandle handle) -{ - int errors = 0; - - if (!handle) - { - LT__SETERROR (INVALID_HANDLE); - ++errors; - } - else - { - handle->info.is_resident = 1; - } - - return errors; -} - -int -lt_dlisresident (lt_dlhandle handle) -{ - if (!handle) - { - LT__SETERROR (INVALID_HANDLE); - return -1; - } - - return LT_DLIS_RESIDENT (handle); -} - - - -/* --- MODULE INFORMATION --- */ - -typedef struct { - const char *id_string; - lt_dlhandle_interface *iface; -} lt__interface_id; - -lt_dlinterface_id -lt_dlinterface_register (const char *id_string, lt_dlhandle_interface *iface) -{ - lt__interface_id *interface_id = (lt__interface_id *) lt__malloc (sizeof *interface_id); - - /* If lt__malloc fails, it will LT__SETERROR (NO_MEMORY), which - can then be detected with lt_dlerror() if we return 0. */ - if (interface_id) - { - interface_id->id_string = lt__strdup (id_string); - if (!interface_id->id_string) - FREE (interface_id); - else - interface_id->iface = iface; - } - - return (lt_dlinterface_id) interface_id; -} - -void lt_dlinterface_free (lt_dlinterface_id key) -{ - lt__interface_id *interface_id = (lt__interface_id *)key; - FREE (interface_id->id_string); - FREE (interface_id); -} - -void * -lt_dlcaller_set_data (lt_dlinterface_id key, lt_dlhandle handle, void *data) -{ - int n_elements = 0; - void *stale = (void *) 0; - lt_dlhandle cur = handle; - int i; - - if (cur->interface_data) - while (cur->interface_data[n_elements].key) - ++n_elements; - - for (i = 0; i < n_elements; ++i) - { - if (cur->interface_data[i].key == key) - { - stale = cur->interface_data[i].data; - break; - } - } - - /* Ensure that there is enough room in this handle's interface_data - array to accept a new element (and an empty end marker). */ - if (i == n_elements) - { - lt_interface_data *temp - = REALLOC (lt_interface_data, cur->interface_data, 2+ n_elements); - - if (!temp) - { - stale = 0; - goto done; - } - - cur->interface_data = temp; - - /* We only need this if we needed to allocate a new interface_data. */ - cur->interface_data[i].key = key; - cur->interface_data[1+ i].key = 0; - } - - cur->interface_data[i].data = data; - - done: - return stale; -} - -void * -lt_dlcaller_get_data (lt_dlinterface_id key, lt_dlhandle handle) -{ - void *result = (void *) 0; - lt_dlhandle cur = handle; - - /* Locate the index of the element with a matching KEY. */ - if (cur->interface_data) - { - int i; - for (i = 0; cur->interface_data[i].key; ++i) - { - if (cur->interface_data[i].key == key) - { - result = cur->interface_data[i].data; - break; - } - } - } - - return result; -} - -const lt_dlinfo * -lt_dlgetinfo (lt_dlhandle handle) -{ - if (!handle) - { - LT__SETERROR (INVALID_HANDLE); - return 0; - } - - return &(handle->info); -} - - -lt_dlhandle -lt_dlhandle_iterate (lt_dlinterface_id iface, lt_dlhandle place) -{ - lt_dlhandle handle = place; - lt__interface_id *iterator = (lt__interface_id *) iface; - - assert (iface); /* iface is a required argument */ - - if (!handle) - handle = handles; - else - handle = handle->next; - - /* advance while the interface check fails */ - while (handle && iterator->iface - && ((*iterator->iface) (handle, iterator->id_string) != 0)) - { - handle = handle->next; - } - - return handle; -} - - -lt_dlhandle -lt_dlhandle_fetch (lt_dlinterface_id iface, const char *module_name) -{ - lt_dlhandle handle = 0; - - assert (iface); /* iface is a required argument */ - - while ((handle = lt_dlhandle_iterate (iface, handle))) - { - lt_dlhandle cur = handle; - if (cur && cur->info.name && streq (cur->info.name, module_name)) - break; - } - - return handle; -} - - -int -lt_dlhandle_map (lt_dlinterface_id iface, - int (*func) (lt_dlhandle handle, void *data), void *data) -{ - lt__interface_id *iterator = (lt__interface_id *) iface; - lt_dlhandle cur = handles; - - assert (iface); /* iface is a required argument */ - - while (cur) - { - int errorcode = 0; - - /* advance while the interface check fails */ - while (cur && iterator->iface - && ((*iterator->iface) (cur, iterator->id_string) != 0)) - { - cur = cur->next; - } - - if ((errorcode = (*func) (cur, data)) != 0) - return errorcode; - } - - return 0; -} |