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Diffstat (limited to 'winsup/cygwin/dlfcn.cc')
| -rw-r--r-- | winsup/cygwin/dlfcn.cc | 236 |
1 files changed, 0 insertions, 236 deletions
diff --git a/winsup/cygwin/dlfcn.cc b/winsup/cygwin/dlfcn.cc deleted file mode 100644 index 21c6e5bd0..000000000 --- a/winsup/cygwin/dlfcn.cc +++ /dev/null @@ -1,236 +0,0 @@ -/* dlfcn.cc - - Copyright 1998, 2000 Cygnus Solutions - -This file is part of Cygwin. - -This software is a copyrighted work licensed under the terms of the -Cygwin license. Please consult the file "CYGWIN_LICENSE" for -details. */ - -#include <stdio.h> -#include <stdlib.h> -#include <unistd.h> -#include "winsup.h" -#include <ctype.h> -#include "dlfcn.h" -#include "dll_init.h" - -#ifdef _MT_SAFE -#define _dl_error _reent_winsup()->_dl_error -#define _dl_buffer _reent_winsup()->_dl_buffer -#else -static int _dl_error = 0; -static char _dl_buffer[256]; -#endif - -static void __stdcall -set_dl_error (const char *str) -{ - __small_sprintf (_dl_buffer, "%s: %E", str); - _dl_error = 1; -} - -// -// this function checks for existence of a file specified by the -// directory and name components. If successful, return a pointer -// the full pathname (static buffer), or else return 0. -// -static const char * __stdcall -check_access (const char *dir, const char *name) -{ - static char buf[MAX_PATH]; - const char *ret = 0; - - buf[0] = 0; - strcpy (buf, dir); - strcat (buf, "\\"); - strcat (buf, name); - - if (!access (buf, F_OK)) - ret = buf; - return ret; -} - -// -// this function looks for an executable file given the name and the -// environment variable to use for searching (eg., PATH); returns -// the full pathname (static buffer) if found or NULL if not. -// -static const char * __stdcall -check_path_access (const char *mywinenv, const char *name) -{ - static char buf[MAX_PATH]; - return find_exec (name, buf, mywinenv, TRUE); -} - -// -// This function simulates the same search as LoadLibary + check -// environment variable LD_LIBRARY_PATH. If found, return the full -// pathname (static buffer); if illegal, return the input string -// unchanged and let the caller deal with it; return NULL otherwise. -// -// Note that this should never be called with a NULL string, since -// that is the introspective case, and the caller should not call -// this function at all. -// -static const char * __stdcall -get_full_path_of_dll (const char* str) -{ - int len = (str) ? strlen (str) : 0; - - // NULL or empty string or too long to be legal win32 pathname? - if (len == 0 || len >= MAX_PATH - 1) - return str; - - char buf[MAX_PATH]; - static char name[MAX_PATH]; - const char *ret = 0; - - strcpy (name, str); - - // add extension if necessary, but leave a trailing '.', if any, alone. - // Files with trailing '.'s are handled differently by win32 API. - if (str[len - 1] != '.') - { - // add .dll only if no extension provided. Handle various cases: - // - // ./shlib --> ./shlib.dll - // ./dir/shlib.so --> ./dir/shlib.so - // shlib --> shlib.dll - // shlib.dll --> shlib.dll - // shlib.so --> shlib.so - // - const char *p = strrchr (str, '.'); - if (!p || isdirsep (p[1])) - strcat (name, ".dll"); - } - - // deal with fully qualified filename right away. Do the actual - // conversion to win32 filename just before returning however. - if (isabspath (str)) - ret = name; - - // current directory - if (!ret) - { - if (GetCurrentDirectory (MAX_PATH, buf) == 0) - small_printf ("WARNING: get_full_path_of_dll can't get current directory win32 %E\n"); - else - ret = check_access (buf, name); - } - - // LD_LIBRARY_PATH - if (!ret) - ret = check_path_access ("LD_LIBRARY_PATH=", name); - - if (!ret) - { - // system directory - if (GetSystemDirectory (buf, MAX_PATH) == 0) - small_printf ("WARNING: get_full_path_of_dll can't get system directory win32 %E\n"); - else - ret = check_access (buf, name); - } - - // 16 bits system directory - if (!ret && (os_being_run == winNT)) - { - // we assume last dir was xxxxx\SYSTEM32, so we remove 32 - len = strlen (buf); - buf[len - 2] = 0; - ret = check_access (buf, name); - } - - // windows directory - if (!ret) - { - if (GetWindowsDirectory (buf, MAX_PATH) == 0) - small_printf ("WARNING: get_full_path_of_dll can't get Windows directory win32 %E\n"); - else - ret = check_access (buf, name); - } - - // PATH - if (!ret) - ret = check_path_access ("PATH=", name); - - // - // now do a final conversion to win32 pathname. This step is necessary - // to resolve symlinks etc so that win32 API finds the underlying file. - // - if (ret) - { - path_conv real_filename (ret, SYMLINK_FOLLOW, 1); - if (real_filename.error) - ret = 0; - else - { - strcpy (name, real_filename.get_win32 ()); - ret = name; - } - } - return ret; -} - -void * -dlopen (const char *name, int) -{ - SetResourceLock(LOCK_DLL_LIST,READ_LOCK|WRITE_LOCK," dlopen"); - - void *ret = 0; - - if (!name) - { - // handle for the current module - ret = (void *) GetModuleHandle (0); - } - else - { - // handle for the named library - const char *fullpath = get_full_path_of_dll (name); - DllList::the().currentDlOpenedLib (fullpath); - ret = (void *) LoadLibrary (fullpath); - } - - if (!ret) - set_dl_error ("dlopen"); - debug_printf ("ret %p", ret); - - ReleaseResourceLock(LOCK_DLL_LIST,READ_LOCK|WRITE_LOCK," dlopen"); - return ret; -} - -void * -dlsym (void *handle, const char *name) -{ - void *ret = (void *) GetProcAddress ((HMODULE) handle, name); - if (!ret) - set_dl_error ("dlsym"); - debug_printf ("ret %p", ret); - return ret; -} - -int -dlclose (void *handle) -{ - SetResourceLock(LOCK_DLL_LIST,READ_LOCK|WRITE_LOCK," dlclose"); - - int ret = -1; - if (FreeLibrary ((HMODULE) handle)) - ret = 0; - if (ret) - set_dl_error ("dlclose"); - - ReleaseResourceLock(LOCK_DLL_LIST,READ_LOCK|WRITE_LOCK," dlclose"); - return ret; -} - -char * -dlerror () -{ - char *ret = 0; - if (_dl_error) - ret = _dl_buffer; - return ret; -} |