/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ /* GTK - The GIMP Toolkit * Copyright (C) David Zeuthen * Copyright (C) 2001 Havoc Pennington * Copyright (C) 2005-2007 Vincent Untz * * This library 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. * * This library 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 this library; if not, write to the * Free Software Foundation, Inc., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. */ /* * Modified by the GTK+ Team and others 1997-2000. See the AUTHORS * file for a list of people on the GTK+ Team. See the ChangeLog * files for a list of changes. These files are distributed with * GTK+ at ftp://ftp.gtk.org/pub/gtk/. */ #include "config.h" #include #include #include #include "x11/gdkx.h" #include #include #include "gtkintl.h" /* for the kill(2) system call and errno - POSIX.1-2001 and later */ #include #include #include #include "gtkmountoperationprivate.h" #include "gtkalias.h" /* ---------------------------------------------------------------------------------------------------- */ /* these functions are based on code from libwnck (LGPLv2) */ static gboolean get_window_list (Display *xdisplay, Window xwindow, Atom atom, Window **windows, int *len); static char* get_utf8_property (Display *xdisplay, Window xwindow, Atom atom); static gboolean get_cardinal (Display *xdisplay, Window xwindow, Atom atom, int *val); static gboolean read_rgb_icon (Display *xdisplay, Window xwindow, int ideal_width, int ideal_height, int *width, int *height, guchar **pixdata); static gboolean get_cardinal (Display *xdisplay, Window xwindow, Atom atom, int *val) { Atom type; int format; gulong nitems; gulong bytes_after; gulong *num; int err, result; *val = 0; gdk_error_trap_push (); type = None; result = XGetWindowProperty (xdisplay, xwindow, atom, 0, G_MAXLONG, False, XA_CARDINAL, &type, &format, &nitems, &bytes_after, (void*)&num); XSync (xdisplay, False); err = gdk_error_trap_pop (); if (err != Success || result != Success) return FALSE; if (type != XA_CARDINAL) { XFree (num); return FALSE; } *val = *num; XFree (num); return TRUE; } static char* get_utf8_property (Display *xdisplay, Window xwindow, Atom atom) { Atom type; int format; gulong nitems; gulong bytes_after; gchar *val; int err, result; char *retval; Atom utf8_string; utf8_string = gdk_x11_get_xatom_by_name ("UTF8_STRING"); gdk_error_trap_push (); type = None; val = NULL; result = XGetWindowProperty (xdisplay, xwindow, atom, 0, G_MAXLONG, False, utf8_string, &type, &format, &nitems, &bytes_after, (guchar **)&val); XSync (xdisplay, False); err = gdk_error_trap_pop (); if (err != Success || result != Success) return NULL; if (type != utf8_string || format != 8 || nitems == 0) { if (val) XFree (val); return NULL; } if (!g_utf8_validate (val, nitems, NULL)) { g_warning ("Property %s contained invalid UTF-8\n", gdk_x11_get_xatom_name (atom)); XFree (val); return NULL; } retval = g_strndup (val, nitems); XFree (val); return retval; } static gboolean find_largest_sizes (gulong *data, gulong nitems, int *width, int *height) { *width = 0; *height = 0; while (nitems > 0) { int w, h; gboolean replace; replace = FALSE; if (nitems < 3) return FALSE; /* no space for w, h */ w = data[0]; h = data[1]; if (nitems < ((w * h) + 2)) return FALSE; /* not enough data */ *width = MAX (w, *width); *height = MAX (h, *height); data += (w * h) + 2; nitems -= (w * h) + 2; } return TRUE; } static gboolean find_best_size (gulong *data, gulong nitems, int ideal_width, int ideal_height, int *width, int *height, gulong **start) { int best_w; int best_h; gulong *best_start; int max_width, max_height; *width = 0; *height = 0; *start = NULL; if (!find_largest_sizes (data, nitems, &max_width, &max_height)) return FALSE; if (ideal_width < 0) ideal_width = max_width; if (ideal_height < 0) ideal_height = max_height; best_w = 0; best_h = 0; best_start = NULL; while (nitems > 0) { int w, h; gboolean replace; replace = FALSE; if (nitems < 3) return FALSE; /* no space for w, h */ w = data[0]; h = data[1]; if (nitems < ((w * h) + 2)) break; /* not enough data */ if (best_start == NULL) { replace = TRUE; } else { /* work with averages */ const int ideal_size = (ideal_width + ideal_height) / 2; int best_size = (best_w + best_h) / 2; int this_size = (w + h) / 2; /* larger than desired is always better than smaller */ if (best_size < ideal_size && this_size >= ideal_size) replace = TRUE; /* if we have too small, pick anything bigger */ else if (best_size < ideal_size && this_size > best_size) replace = TRUE; /* if we have too large, pick anything smaller * but still >= the ideal */ else if (best_size > ideal_size && this_size >= ideal_size && this_size < best_size) replace = TRUE; } if (replace) { best_start = data + 2; best_w = w; best_h = h; } data += (w * h) + 2; nitems -= (w * h) + 2; } if (best_start) { *start = best_start; *width = best_w; *height = best_h; return TRUE; } else return FALSE; } static void argbdata_to_pixdata (gulong *argb_data, int len, guchar **pixdata) { guchar *p; int i; *pixdata = g_new (guchar, len * 4); p = *pixdata; /* One could speed this up a lot. */ i = 0; while (i < len) { guint argb; guint rgba; argb = argb_data[i]; rgba = (argb << 8) | (argb >> 24); *p = rgba >> 24; ++p; *p = (rgba >> 16) & 0xff; ++p; *p = (rgba >> 8) & 0xff; ++p; *p = rgba & 0xff; ++p; ++i; } } static gboolean read_rgb_icon (Display *xdisplay, Window xwindow, int ideal_width, int ideal_height, int *width, int *height, guchar **pixdata) { Atom type; int format; gulong nitems; gulong bytes_after; int result, err; gulong *data; gulong *best; int w, h; gdk_error_trap_push (); type = None; data = NULL; result = XGetWindowProperty (xdisplay, xwindow, gdk_x11_get_xatom_by_name ("_NET_WM_ICON"), 0, G_MAXLONG, False, XA_CARDINAL, &type, &format, &nitems, &bytes_after, (void*)&data); XSync (xdisplay, False); err = gdk_error_trap_pop (); if (err != Success || result != Success) return FALSE; if (type != XA_CARDINAL) { XFree (data); return FALSE; } if (!find_best_size (data, nitems, ideal_width, ideal_height, &w, &h, &best)) { XFree (data); return FALSE; } *width = w; *height = h; argbdata_to_pixdata (best, w * h, pixdata); XFree (data); return TRUE; } static void free_pixels (guchar *pixels, gpointer data) { g_free (pixels); } static GdkPixbuf* scaled_from_pixdata (guchar *pixdata, int w, int h, int new_w, int new_h) { GdkPixbuf *src; GdkPixbuf *dest; src = gdk_pixbuf_new_from_data (pixdata, GDK_COLORSPACE_RGB, TRUE, 8, w, h, w * 4, free_pixels, NULL); if (src == NULL) return NULL; if (w != h) { GdkPixbuf *tmp; int size; size = MAX (w, h); tmp = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8, size, size); if (tmp != NULL) { gdk_pixbuf_fill (tmp, 0); gdk_pixbuf_copy_area (src, 0, 0, w, h, tmp, (size - w) / 2, (size - h) / 2); g_object_unref (src); src = tmp; } } if (w != new_w || h != new_h) { dest = gdk_pixbuf_scale_simple (src, new_w, new_h, GDK_INTERP_BILINEAR); g_object_unref (G_OBJECT (src)); } else { dest = src; } return dest; } static gboolean get_window_list (Display *xdisplay, Window xwindow, Atom atom, Window **windows, int *len) { Atom type; int format; gulong nitems; gulong bytes_after; Window *data; int err, result; *windows = NULL; *len = 0; gdk_error_trap_push (); type = None; result = XGetWindowProperty (xdisplay, xwindow, atom, 0, G_MAXLONG, False, XA_WINDOW, &type, &format, &nitems, &bytes_after, (void*)&data); XSync (xdisplay, False); err = gdk_error_trap_pop (); if (err != Success || result != Success) return FALSE; if (type != XA_WINDOW) { XFree (data); return FALSE; } *windows = g_new (Window, nitems); memcpy (*windows, data, sizeof (Window) * nitems); *len = nitems; XFree (data); return TRUE; } /* ---------------------------------------------------------------------------------------------------- */ struct _GtkMountOperationLookupContext { /* Hash from pid (gint) -> XID (gint) * * Note that XIDs are at most 27 bits - however, also note that sizeof(XID) == 8 on * x86_64 - that's just xlib brokenness. So it's safe to stuff the XID into a pointer. */ GHashTable *pid_to_window; GdkDisplay *display; }; GtkMountOperationLookupContext * _gtk_mount_operation_lookup_context_get (GdkDisplay *display) { GtkMountOperationLookupContext *context; Window *mapping; gint mapping_length; gint n; context = g_new0 (GtkMountOperationLookupContext, 1); context->pid_to_window = g_hash_table_new (g_direct_hash, g_direct_equal); context->display = display; mapping = NULL; mapping_length = 0; get_window_list (GDK_DISPLAY_XDISPLAY (context->display), GDK_ROOT_WINDOW(), gdk_x11_get_xatom_by_name_for_display (context->display, "_NET_CLIENT_LIST"), &mapping, &mapping_length); for (n = 0; n < mapping_length; n++) { gint pid; if (!get_cardinal (GDK_DISPLAY_XDISPLAY (context->display), mapping[n], gdk_x11_get_xatom_by_name_for_display (context->display, "_NET_WM_PID"), &pid)) continue; g_hash_table_insert (context->pid_to_window, GINT_TO_POINTER (pid), GINT_TO_POINTER ((gint) mapping[n])); } g_free (mapping); return context; } void _gtk_mount_operation_lookup_context_free (GtkMountOperationLookupContext *context) { g_hash_table_unref (context->pid_to_window); g_free (context); } /* ---------------------------------------------------------------------------------------------------- */ #ifdef __linux__ static GPid pid_get_parent (GPid pid) { GPid ppid; gchar **tokens; gchar *stat_filename; gchar *stat_contents; gsize stat_len; ppid = 0; tokens = NULL; stat_contents = NULL; stat_filename = NULL; /* fail if trying to get the parent of the init process (no such thing) */ if (pid == 1) goto out; stat_filename = g_strdup_printf ("/proc/%d/status", pid); if (g_file_get_contents (stat_filename, &stat_contents, &stat_len, NULL)) { guint n; tokens = g_strsplit (stat_contents, "\n", 0); for (n = 0; tokens[n] != NULL; n++) { if (g_str_has_prefix (tokens[n], "PPid:")) { gchar *endp; endp = NULL; ppid = strtoll (tokens[n] + sizeof "PPid:" - 1, &endp, 10); if (endp == NULL || *endp != '\0') { g_warning ("Error parsing contents of `%s'. Parent pid is malformed.", stat_filename); ppid = 0; goto out; } break; } } } out: g_strfreev (tokens); g_free (stat_contents); g_free (stat_filename); return ppid; } static gchar * pid_get_env (GPid pid, const gchar *key) { gchar *ret; gchar *env_filename; gchar *env; gsize env_len; gsize key_len; gchar *end; ret = NULL; key_len = strlen (key); env_filename = g_strdup_printf ("/proc/%d/environ", pid); if (g_file_get_contents (env_filename, &env, &env_len, NULL)) { guint n; /* /proc//environ in Linux is split at '\0' points, g_strsplit() can't handle that... */ n = 0; while (TRUE) { if (env[n] == '\0' || n >= env_len) break; if (g_str_has_prefix (env + n, key) && (*(env + n + key_len) == '=')) { ret = g_strdup (env + n + key_len + 1); /* skip invalid UTF-8 */ if (!g_utf8_validate (ret, -1, (const gchar **) &end)) *end = '\0'; break; } for (; env[n] != '\0' && n < env_len; n++) ; n++; } g_free (env); } g_free (env_filename); return ret; } static gchar * pid_get_command_line (GPid pid) { gchar *cmdline_filename; gchar *cmdline_contents; gsize cmdline_len; guint n; gchar *end; cmdline_contents = NULL; cmdline_filename = g_strdup_printf ("/proc/%d/cmdline", pid); if (!g_file_get_contents (cmdline_filename, &cmdline_contents, &cmdline_len, NULL)) goto out; /* /proc//cmdline separates args by NUL-bytes - replace with spaces */ for (n = 0; n < cmdline_len - 1; n++) { if (cmdline_contents[n] == '\0') cmdline_contents[n] = ' '; } /* skip invalid UTF-8 */ if (!g_utf8_validate (cmdline_contents, -1, (const gchar **) &end)) *end = '\0'; out: g_free (cmdline_filename); return cmdline_contents; } /* ---------------------------------------------------------------------------------------------------- */ #else /* TODO: please implement for your OS - must return valid UTF-8 */ static GPid pid_get_parent (GPid pid) { return 0; } static gchar * pid_get_env (GPid pid, const gchar *key) { return NULL; } static gchar * pid_get_command_line (GPid pid) { return NULL; } #endif /* ---------------------------------------------------------------------------------------------------- */ static gchar * get_name_for_window_with_pid (GtkMountOperationLookupContext *context, GPid pid) { Window window; Window windowid_window; gchar *ret; ret = NULL; window = GPOINTER_TO_INT (g_hash_table_lookup (context->pid_to_window, GINT_TO_POINTER (pid))); if (window == None) { gchar *windowid_value; /* check for $WINDOWID (set by terminals) and see if we can get the title that way */ windowid_value = pid_get_env (pid, "WINDOWID"); if (windowid_value != NULL) { gchar *endp; endp = NULL; windowid_window = (Window) g_ascii_strtoll (windowid_value, &endp, 10); if (endp != NULL || *endp == '\0') { window = windowid_window; } g_free (windowid_value); } /* otherwise, check for parents */ if (window == None) { do { pid = pid_get_parent (pid); if (pid == 0) break; window = GPOINTER_TO_INT (g_hash_table_lookup (context->pid_to_window, GINT_TO_POINTER (pid))); if (window != None) break; } while (TRUE); } } if (window != None) { ret = get_utf8_property (GDK_DISPLAY_XDISPLAY (context->display), window, gdk_x11_get_xatom_by_name_for_display (context->display, "_NET_WM_NAME")); if (ret == NULL) ret = get_utf8_property (GDK_DISPLAY_XDISPLAY (context->display), window, gdk_x11_get_xatom_by_name_for_display (context->display, "_NET_WM_ICON_NAME")); } return ret; } /* ---------------------------------------------------------------------------------------------------- */ static GdkPixbuf * get_pixbuf_for_window_with_pid (GtkMountOperationLookupContext *context, GPid pid, gint size_pixels) { Window window; GdkPixbuf *ret; ret = NULL; window = GPOINTER_TO_INT (g_hash_table_lookup (context->pid_to_window, GINT_TO_POINTER (pid))); if (window == None) { /* otherwise, check for parents */ do { pid = pid_get_parent (pid); if (pid == 0) break; window = GPOINTER_TO_INT (g_hash_table_lookup (context->pid_to_window, GINT_TO_POINTER (pid))); if (window != None) break; } while (TRUE); } if (window != None) { gint width; gint height; guchar *pixdata; if (read_rgb_icon (GDK_DISPLAY_XDISPLAY (context->display), window, size_pixels, size_pixels, &width, &height, &pixdata)) { /* steals pixdata */ ret = scaled_from_pixdata (pixdata, width, height, size_pixels, size_pixels); } } return ret; } /* ---------------------------------------------------------------------------------------------------- */ static const gchar *well_known_commands[] = { /* translators: this string is a name for the 'less' command */ "less", N_("Terminal Pager"), "top", N_("Top Command"), "bash", N_("Bourne Again Shell"), "sh", N_("Bourne Shell"), "zsh", N_("Z Shell"), NULL, }; gboolean _gtk_mount_operation_lookup_info (GtkMountOperationLookupContext *context, GPid pid, gint size_pixels, gchar **out_name, gchar **out_command_line, GdkPixbuf **out_pixbuf) { g_return_val_if_fail (out_name != NULL && *out_name == NULL, FALSE); g_return_val_if_fail (out_command_line != NULL && *out_command_line == NULL, FALSE); g_return_val_if_fail (out_pixbuf != NULL && *out_pixbuf == NULL, FALSE); /* We perform two different lookups for name and icon size.. this is * because we want the name from the window with WINDOWID and this * normally does not give you an icon * * (the canonical example is a tab in gnome-terminal - the shell/command running * in the shell will have WINDOWID set - but this window won't have an icon - so * we want to continue up until the gnome-terminal window so we can get that icon) */ *out_command_line = pid_get_command_line (pid); *out_name = get_name_for_window_with_pid (context, pid); *out_pixbuf = get_pixbuf_for_window_with_pid (context, pid, size_pixels); /* if we didn't manage to find the name via X, fall back to the basename * of the first element of the command line and, for maximum geek-comfort, * map a few well-known commands to proper translated names */ if (*out_name == NULL && *out_command_line != NULL && strlen (*out_command_line) > 0 && (*out_command_line)[0] != ' ') { guint n; gchar *s; gchar *p; /* find the first character after the first argument */ s = strchr (*out_command_line, ' '); if (s == NULL) s = *out_command_line + strlen (*out_command_line); for (p = s; p > *out_command_line; p--) { if (*p == '/') { p++; break; } } *out_name = g_strndup (p, s - p); for (n = 0; well_known_commands[n] != NULL; n += 2) { /* sometimes the command is prefixed with a -, e.g. '-bash' instead * of 'bash' - handle that as well */ if ((strcmp (well_known_commands[n], *out_name) == 0) || ((*out_name)[0] == '-' && (strcmp (well_known_commands[n], (*out_name) + 1) == 0))) { g_free (*out_name); *out_name = g_strdup (_(well_known_commands[n+1])); break; } } } return TRUE; } gboolean _gtk_mount_operation_kill_process (GPid pid, GError **error) { gboolean ret; ret = TRUE; if (kill ((pid_t) pid, SIGTERM) != 0) { int errsv = errno; /* TODO: On EPERM, we could use a setuid helper using polkit (very easy to implement * via pkexec(1)) to allow the user to e.g. authenticate to gain the authorization * to kill the process. But that's not how things currently work. */ ret = FALSE; g_set_error (error, G_IO_ERROR, g_io_error_from_errno (errsv), _("Cannot end process with PID %d: %s"), pid, g_strerror (errsv)); } return ret; }