Edit
IABSD.fr/xenocara/app/twm/src/session.c
matthieu
- app/twm/src/session.c
-
/****************************************************************************** Copyright 1994, 1998 The Open Group Permission to use, copy, modify, distribute, and sell this software and its documentation for any purpose is hereby granted without fee, provided that the above copyright notice appear in all copies and that both that copyright notice and this permission notice appear in supporting documentation. The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. Except as contained in this notice, the name of The Open Group shall not be used in advertising or otherwise to promote the sale, use or other dealings in this Software without prior written authorization from The Open Group. Author: Ralph Mor, X Consortium ******************************************************************************/ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include <X11/Xos.h> #ifndef X_NOT_POSIX #ifdef _POSIX_SOURCE #include <limits.h> #else #define _POSIX_SOURCE #include <limits.h> #undef _POSIX_SOURCE #endif #endif /* X_NOT_POSIX */ #ifndef PATH_MAX #include <sys/param.h> #ifndef PATH_MAX #ifdef MAXPATHLEN #define PATH_MAX MAXPATHLEN #else #define PATH_MAX 1024 #endif #endif #endif /* PATH_MAX */ #ifdef HAVE_MKSTEMP #include <unistd.h> #endif #include <X11/Xlib.h> #include <X11/SM/SMlib.h> #include <X11/Xatom.h> #include <stdio.h> #include "twm.h" #include "screen.h" #include "session.h" SmcConn smcConn = NULL; static XtInputId iceInputId; static char *twm_clientId; static TWMWinConfigEntry *winConfigHead = NULL; static Bool sent_save_done = 0; static SmProp *props[5]; #define SAVEFILE_VERSION 2 #ifndef HAVE_MKSTEMP static char *unique_filename(const char *path, const char *prefix); #else static char *unique_filename(const char *path, const char *prefix, int *pFd); #endif static char * GetClientID(Window window) { char *client_id = NULL; Window client_leader; XTextProperty tp; Atom actual_type; int actual_format; unsigned long nitems; unsigned long bytes_after; unsigned char *prop = NULL; if (XGetWindowProperty(dpy, window, _XA_WM_CLIENT_LEADER, 0L, 1L, False, AnyPropertyType, &actual_type, &actual_format, &nitems, &bytes_after, &prop) == Success) { if (actual_type == XA_WINDOW && actual_format == 32 && nitems == 1 && bytes_after == 0) { client_leader = *((Window *) prop); if (XGetTextProperty(dpy, client_leader, &tp, _XA_SM_CLIENT_ID)) { if (tp.encoding == XA_STRING && tp.format == 8 && tp.nitems != 0) client_id = (char *) tp.value; } } if (prop) XFree(prop); } return client_id; } static char * GetWindowRole(Window window) { XTextProperty tp; if (XGetTextProperty(dpy, window, &tp, _XA_WM_WINDOW_ROLE)) { if (tp.encoding == XA_STRING && tp.format == 8 && tp.nitems != 0) return ((char *) tp.value); } return NULL; } static int write_byte(FILE *file, unsigned char b) { if (fwrite((char *) &b, 1, 1, file) != 1) return 0; return 1; } static int write_ushort(FILE *file, unsigned short s) { unsigned char file_short[2]; file_short[0] = (unsigned char) ((s & (unsigned) 0xff00) >> 8); file_short[1] = (unsigned char) (s & 0xff); if (fwrite((char *) file_short, (int) sizeof(file_short), 1, file) != 1) return 0; return 1; } static int write_short(FILE *file, short s) { unsigned char file_short[2]; file_short[0] = (unsigned char) (((unsigned) s & (unsigned) 0xff00) >> 8); file_short[1] = (unsigned char) (s & 0xff); if (fwrite((char *) file_short, (int) sizeof(file_short), 1, file) != 1) return 0; return 1; } static int write_counted_string(FILE *file, char *string) { if (string) { unsigned char count = (unsigned char) strlen(string); if (write_byte(file, count) == 0) return 0; if (fwrite(string, (int) sizeof(char), (int) count, file) != count) return 0; } else { if (write_byte(file, 0) == 0) return 0; } return 1; } static int read_byte(FILE *file, unsigned char *bp) { if (fread((char *) bp, 1, 1, file) != 1) return 0; return 1; } static int read_ushort(FILE *file, unsigned short *shortp) { unsigned char file_short[2]; if (fread((char *) file_short, (int) sizeof(file_short), 1, file) != 1) return 0; *shortp = (unsigned short) (file_short[0] * 256 + file_short[1]); return 1; } static int read_short(FILE *file, short *shortp) { unsigned char file_short[2]; if (fread((char *) file_short, (int) sizeof(file_short), 1, file) != 1) return 0; *shortp = (short) (file_short[0] * 256 + file_short[1]); return 1; } static int read_counted_string(FILE *file, char **stringp) { unsigned char len; char *data; if (read_byte(file, &len) == 0) return 0; if (len == 0) { data = NULL; } else { data = (char *) malloc((unsigned) len + 1); if (!data) return 0; if (fread(data, (int) sizeof(char), (int) len, file) != len) { free(data); return 0; } data[len] = '\0'; } *stringp = data; return 1; } /* * An entry in the saved window config file looks like this: * * FIELD BYTES * ----- ---- * SM_CLIENT_ID ID len 1 (may be 0) * SM_CLIENT_ID LIST of bytes (may be NULL) * * WM_WINDOW_ROLE length 1 (may be 0) * WM_WINDOW_ROLE LIST of bytes (may be NULL) * * if no WM_WINDOW_ROLE (length = 0) * * WM_CLASS "res name" length 1 * WM_CLASS "res name" LIST of bytes * WM_CLASS "res class" length 1 * WM_CLASS "res class" LIST of bytes * WM_NAME length 1 (0 if name changed) * WM_NAME LIST of bytes * WM_COMMAND arg count 1 (0 if no SM_CLIENT_ID) * For each arg in WM_COMMAND * arg length 1 * arg LIST of bytes * * Iconified bool 1 * Icon info present bool 1 * * if icon info present * icon x 2 * icon y 2 * * Geom x 2 * Geom y 2 * Geom width 2 * Geom height 2 * * Width ever changed by user 1 * Height ever changed by user 1 */ static int WriteWinConfigEntry(FILE *configFile, TwmWindow *theWindow, char *clientId, char *windowRole) { char **wm_command; int wm_command_count; unsigned udummy = 0; if (!write_counted_string(configFile, clientId)) return 0; if (!write_counted_string(configFile, windowRole)) return 0; if (!windowRole) { if (!write_counted_string(configFile, theWindow->xclass.res_name)) return 0; if (!write_counted_string(configFile, theWindow->xclass.res_class)) return 0; if (theWindow->nameChanged) { /* * If WM_NAME changed on this window, we can't use it as * a criteria for looking up window configurations. See the * longer explanation in the GetWindowConfig() function below. */ if (!write_counted_string(configFile, NULL)) return 0; } else { if (!write_counted_string(configFile, theWindow->name)) return 0; } wm_command = NULL; wm_command_count = 0; XGetCommand(dpy, theWindow->w, &wm_command, &wm_command_count); if (clientId || !wm_command || wm_command_count == 0) { if (!write_byte(configFile, 0)) return 0; } else { int i; if (!write_byte(configFile, (unsigned char) wm_command_count)) return 0; for (i = 0; i < wm_command_count; i++) if (!write_counted_string(configFile, wm_command[i])) return 0; XFreeStringList(wm_command); } } if (!write_byte(configFile, theWindow->icon ? 1 : 0)) /* iconified */ return 0; if (!write_byte(configFile, theWindow->icon_w ? 1 : 0)) /* icon exists */ return 0; if (theWindow->icon_w) { int icon_x, icon_y; Window wdummy = None; XGetGeometry(dpy, theWindow->icon_w, &wdummy, &icon_x, &icon_y, &udummy, &udummy, &udummy, &udummy); if (!write_short(configFile, (short) icon_x)) return 0; if (!write_short(configFile, (short) icon_y)) return 0; } if (!write_short(configFile, (short) theWindow->frame_x)) return 0; if (!write_short(configFile, (short) theWindow->frame_y)) return 0; if (!write_ushort(configFile, (unsigned short) theWindow->attr.width)) return 0; if (!write_ushort(configFile, (unsigned short) theWindow->attr.height)) return 0; if (!write_byte(configFile, theWindow->widthEverChangedByUser ? 1 : 0)) return 0; if (!write_byte(configFile, theWindow->heightEverChangedByUser ? 1 : 0)) return 0; return 1; } static int ReadWinConfigEntry(FILE *configFile, unsigned short version, TWMWinConfigEntry **pentry) { TWMWinConfigEntry *entry; unsigned char byte; int i; *pentry = entry = (TWMWinConfigEntry *) malloc(sizeof(TWMWinConfigEntry)); if (!*pentry) return 0; entry->tag = 0; entry->client_id = NULL; entry->window_role = NULL; entry->xclass.res_name = NULL; entry->xclass.res_class = NULL; entry->wm_name = NULL; entry->wm_command = NULL; entry->wm_command_count = 0; if (!read_counted_string(configFile, &entry->client_id)) goto give_up; if (!read_counted_string(configFile, &entry->window_role)) goto give_up; if (!entry->window_role) { if (!read_counted_string(configFile, &entry->xclass.res_name)) goto give_up; if (!read_counted_string(configFile, &entry->xclass.res_class)) goto give_up; if (!read_counted_string(configFile, &entry->wm_name)) goto give_up; if (!read_byte(configFile, &byte)) goto give_up; entry->wm_command_count = byte; if (entry->wm_command_count == 0) entry->wm_command = NULL; else { entry->wm_command = (char **) malloc((size_t) entry->wm_command_count * sizeof(char *)); if (!entry->wm_command) goto give_up; for (i = 0; i < entry->wm_command_count; i++) if (!read_counted_string(configFile, &entry->wm_command[i])) goto give_up; } } if (!read_byte(configFile, &byte)) goto give_up; entry->iconified = byte; if (!read_byte(configFile, &byte)) goto give_up; entry->icon_info_present = byte; if (entry->icon_info_present) { if (!read_short(configFile, (short *) &entry->icon_x)) goto give_up; if (!read_short(configFile, (short *) &entry->icon_y)) goto give_up; } if (!read_short(configFile, (short *) &entry->x)) goto give_up; if (!read_short(configFile, (short *) &entry->y)) goto give_up; if (!read_ushort(configFile, &entry->width)) goto give_up; if (!read_ushort(configFile, &entry->height)) goto give_up; if (version > 1) { if (!read_byte(configFile, &byte)) goto give_up; entry->width_ever_changed_by_user = byte; if (!read_byte(configFile, &byte)) goto give_up; entry->height_ever_changed_by_user = byte; } else { entry->width_ever_changed_by_user = False; entry->height_ever_changed_by_user = False; } return 1; give_up: if (entry->client_id) free(entry->client_id); if (entry->window_role) free(entry->window_role); if (entry->xclass.res_name) free(entry->xclass.res_name); if (entry->xclass.res_class) free(entry->xclass.res_class); if (entry->wm_name) free(entry->wm_name); if (entry->wm_command_count && entry->wm_command) { for (i = 0; i < entry->wm_command_count; i++) if (entry->wm_command[i]) free(entry->wm_command[i]); } if (entry->wm_command) free(entry->wm_command); free(entry); *pentry = NULL; return 0; } void ReadWinConfigFile(char *filename) { FILE *configFile; TWMWinConfigEntry *entry; int done = 0; unsigned short version = 0; configFile = fopen(filename, "rb"); if (!configFile) return; if (!read_ushort(configFile, &version) || version > SAVEFILE_VERSION) { done = 1; } while (!done) { if (ReadWinConfigEntry(configFile, version, &entry)) { entry->next = winConfigHead; winConfigHead = entry; } else done = 1; } fclose(configFile); } int GetWindowConfig(TwmWindow *theWindow, short *x, short *y, unsigned short *width, unsigned short *height, Bool *iconified, Bool *icon_info_present, short *icon_x, short *icon_y, Bool *width_ever_changed_by_user, Bool *height_ever_changed_by_user) { char *clientId, *windowRole; TWMWinConfigEntry *ptr; int found = 0; ptr = winConfigHead; if (!ptr) return 0; clientId = GetClientID(theWindow->w); windowRole = GetWindowRole(theWindow->w); while (ptr && !found) { int client_id_match = (!clientId && !ptr->client_id) || (clientId && ptr->client_id && strcmp(clientId, ptr->client_id) == 0); if (!ptr->tag && client_id_match) { if (windowRole || ptr->window_role) { found = (windowRole && ptr->window_role && strcmp(windowRole, ptr->window_role) == 0); } else { /* * Compare WM_CLASS + only compare WM_NAME if the * WM_NAME in the saved file is non-NULL. If the * WM_NAME in the saved file is NULL, this means that * the client changed the value of WM_NAME during the * session, and we can not use it as a criteria for * our search. For example, with xmh, at save time * the window name might be "xmh: folderY". However, * if xmh does not properly restore state when it is * restarted, the initial window name might be * "xmh: folderX". This would cause the window manager * to fail in finding the saved window configuration. * The best we can do is ignore WM_NAME if its value * changed in the previous session. */ if (strcmp(theWindow->xclass.res_name, ptr->xclass.res_name) == 0 && strcmp(theWindow->xclass.res_class, ptr->xclass.res_class) == 0 && (ptr->wm_name == NULL || strcmp(theWindow->name, ptr->wm_name) == 0)) { if (clientId) { /* * If a client ID was present, we should not check * WM_COMMAND because Xt will put a -xtsessionID arg * on the command line. */ found = 1; } else { /* * For non-XSMP clients, also check WM_COMMAND. */ char **wm_command = NULL; int wm_command_count = 0; XGetCommand(dpy, theWindow->w, &wm_command, &wm_command_count); if (wm_command_count == ptr->wm_command_count) { int i; for (i = 0; i < wm_command_count; i++) if (strcmp(wm_command[i], ptr->wm_command[i]) != 0) break; if (i == wm_command_count) found = 1; } } } } } if (!found) ptr = ptr->next; } if (found) { *x = ptr->x; *y = ptr->y; *width = ptr->width; *height = ptr->height; *iconified = ptr->iconified; *icon_info_present = ptr->icon_info_present; *width_ever_changed_by_user = ptr->width_ever_changed_by_user; *height_ever_changed_by_user = ptr->height_ever_changed_by_user; if (*icon_info_present) { *icon_x = ptr->icon_x; *icon_y = ptr->icon_y; } ptr->tag = 1; } else *iconified = 0; if (clientId) XFree(clientId); if (windowRole) XFree(windowRole); return found; } #ifndef HAVE_MKSTEMP static char * unique_filename(const char *path, const char *prefix) #else static char * unique_filename(const char *path, const char *prefix, int *pFd) #endif { #ifndef HAVE_MKSTEMP #ifndef X_NOT_POSIX return ((char *) tempnam(path, prefix)); #else char tempFile[PATH_MAX]; char *tmp; snprintf(tempFile, sizeof(tempFile), "%s/%sXXXXXX", path, prefix); tmp = (char *) mktemp(tempFile); if (tmp) return strdup(tmp); else return (NULL); #endif #else char tempFile[PATH_MAX]; char *ptr; snprintf(tempFile, sizeof(tempFile), "%s/%sXXXXXX", path, prefix); ptr = strdup(tempFile); if (ptr != NULL) *pFd = mkstemp(ptr); return ptr; #endif } static void SaveYourselfPhase2CB(SmcConn smcConn2, SmPointer clientData _X_UNUSED) { int scrnum; ScreenInfo *theScreen; TwmWindow *theWindow; char *clientId, *windowRole; FILE *configFile = NULL; const char *path; char *filename = NULL; Bool success = False; char discardCommand[80]; int numVals, i; static int first_time = 1; #ifdef HAVE_MKSTEMP int fd; #endif if (first_time) { char userId[20]; char *hint; props[0] = (SmProp *) calloc(1, sizeof(SmProp)); props[0]->name = strdup(SmProgram); props[0]->type = strdup(SmARRAY8); props[0]->num_vals = 1; props[0]->vals = (SmPropValue *) calloc(1, sizeof(SmPropValue)); props[0]->vals[0].value = strdup(Argv[0]); props[0]->vals[0].length = (int) strlen(Argv[0]); snprintf(userId, sizeof(userId), "%ld", (long) getuid()); props[1] = (SmProp *) calloc(1, sizeof(SmProp)); props[1]->name = strdup(SmUserID); props[1]->type = strdup(SmARRAY8); props[1]->num_vals = 1; props[1]->vals = (SmPropValue *) calloc(1, sizeof(SmPropValue)); props[1]->vals[0].value = strdup(userId); props[1]->vals[0].length = (int) strlen(userId); hint = (char *) malloc(1); hint[0] = SmRestartIfRunning; props[2] = (SmProp *) calloc(1, sizeof(SmProp)); props[2]->name = strdup(SmRestartStyleHint); props[2]->type = strdup(SmCARD8); props[2]->num_vals = 1; props[2]->vals = (SmPropValue *) calloc(1, sizeof(SmPropValue)); props[2]->vals[0].value = hint; props[2]->vals[0].length = 1; SmcSetProperties(smcConn2, 3, props); first_time = 0; } path = getenv("SM_SAVE_DIR"); if (!path) { path = getenv("HOME"); if (!path) path = "."; } #ifndef HAVE_MKSTEMP if ((filename = unique_filename(path, ".twm")) == NULL) goto bad; if (!(configFile = fopen(filename, "wb"))) goto bad; #else if ((filename = unique_filename(path, ".twm", &fd)) == NULL) goto bad; if (!(configFile = fdopen(fd, "wb"))) goto bad; #endif if (!write_ushort(configFile, SAVEFILE_VERSION)) goto bad; success = True; for (scrnum = 0; scrnum < NumScreens && success; scrnum++) { if (ScreenList[scrnum] != NULL) { theScreen = ScreenList[scrnum]; theWindow = theScreen->TwmRoot.next; while (theWindow && success) { clientId = GetClientID(theWindow->w); windowRole = GetWindowRole(theWindow->w); if (!WriteWinConfigEntry(configFile, theWindow, clientId, windowRole)) success = False; if (clientId) XFree(clientId); if (windowRole) XFree(windowRole); theWindow = theWindow->next; } } } props[3] = (SmProp *) calloc(1, sizeof(SmProp)); props[3]->name = strdup(SmRestartCommand); props[3]->type = strdup(SmLISTofARRAY8); props[3]->vals = (SmPropValue *) calloc((size_t)(Argc + 4), sizeof(SmPropValue)); if (!props[3]->vals) { success = False; goto bad; } numVals = 0; for (i = 0; i < Argc; i++) { if (strcmp(Argv[i], "-clientId") == 0 || strcmp(Argv[i], "-restore") == 0) { i++; } else { props[3]->vals[numVals].value = (SmPointer) strdup(Argv[i]); props[3]->vals[numVals++].length = (int) strlen(Argv[i]); } } props[3]->vals[numVals].value = strdup("-clientId"); props[3]->vals[numVals++].length = 9; props[3]->vals[numVals].value = strdup(twm_clientId); props[3]->vals[numVals++].length = (int) strlen(twm_clientId); props[3]->vals[numVals].value = strdup("-restore"); props[3]->vals[numVals++].length = 8; props[3]->vals[numVals].value = strdup(filename); props[3]->vals[numVals++].length = (int) strlen(filename); props[3]->num_vals = numVals; snprintf(discardCommand, sizeof(discardCommand), "rm %s", filename); props[4] = (SmProp *) calloc(1, sizeof(SmProp)); props[4]->name = strdup(SmDiscardCommand); props[4]->type = strdup(SmARRAY8); props[4]->num_vals = 1; props[4]->vals = (SmPropValue *) calloc(1, sizeof(SmPropValue)); props[4]->vals[0].value = strdup(discardCommand); props[4]->vals[0].length = (int) strlen(discardCommand); SmcSetProperties(smcConn2, 2, props + 3); bad: SmcSaveYourselfDone(smcConn2, success); sent_save_done = 1; if (configFile) fclose(configFile); if (filename) free(filename); } static void SaveYourselfCB(SmcConn smcConn2, SmPointer clientData _X_UNUSED, int saveType _X_UNUSED, Bool shutdown _X_UNUSED, int interactStyle _X_UNUSED, Bool fast _X_UNUSED) { if (!SmcRequestSaveYourselfPhase2(smcConn2, SaveYourselfPhase2CB, NULL)) { SmcSaveYourselfDone(smcConn2, False); sent_save_done = 1; } else sent_save_done = 0; } static _X_NORETURN void DieCB(SmcConn smcConn2, SmPointer clientData _X_UNUSED) { SmcCloseConnection(smcConn2, 0, NULL); XtRemoveInput(iceInputId); Done(NULL, NULL); } static void SaveCompleteCB(SmcConn smcConnm _X_UNUSED, SmPointer clientData _X_UNUSED) { ; } static void ShutdownCancelledCB(SmcConn smcConn2, SmPointer clientData _X_UNUSED) { if (!sent_save_done) { SmcSaveYourselfDone(smcConn2, False); sent_save_done = 1; } } static void ProcessIceMsgProc(XtPointer client_data, int *source _X_UNUSED, XtInputId *id _X_UNUSED) { IceConn ice_conn = (IceConn) client_data; IceProcessMessages(ice_conn, NULL, NULL); } void ConnectToSessionManager(char *previous_id, XtAppContext appContext) { char errorMsg[256]; unsigned long mask; SmcCallbacks callbacks; IceConn iceConn; mask = SmcSaveYourselfProcMask | SmcDieProcMask | SmcSaveCompleteProcMask | SmcShutdownCancelledProcMask; callbacks.save_yourself.callback = SaveYourselfCB; callbacks.save_yourself.client_data = (SmPointer) NULL; callbacks.die.callback = DieCB; callbacks.die.client_data = (SmPointer) NULL; callbacks.save_complete.callback = SaveCompleteCB; callbacks.save_complete.client_data = (SmPointer) NULL; callbacks.shutdown_cancelled.callback = ShutdownCancelledCB; callbacks.shutdown_cancelled.client_data = (SmPointer) NULL; smcConn = SmcOpenConnection(NULL, /* use SESSION_MANAGER env */ (SmPointer) appContext, SmProtoMajor, SmProtoMinor, mask, &callbacks, previous_id, &twm_clientId, 256, errorMsg); if (smcConn == NULL) return; iceConn = SmcGetIceConnection(smcConn); iceInputId = XtAppAddInput(appContext, IceConnectionNumber(iceConn), (XtPointer) XtInputReadMask, ProcessIceMsgProc, (XtPointer) iceConn); } void DestroySession(void) { int i; for (i = 0; i < 5; ++i) { if (props[i]) { SmFreeProperty(props[i]); } } }