gtkmountoperation-x11.c 26 KB
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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* GTK - The GIMP Toolkit
 * Copyright (C) David Zeuthen <davidz@redhat.com>
 * 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
Javier Jardón's avatar
Javier Jardón committed
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 * License along with this library. If not, see <http://www.gnu.org/licenses/>.
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 */

/*
 * 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 <string.h>
#include <stdlib.h>
#include <gio/gio.h>
#include "x11/gdkx.h"
#include <X11/Xatom.h>
#include <gtk/gtkicontheme.h>
#include "gtkintl.h"

/* for the kill(2) system call and errno - POSIX.1-2001 and later */
#include <sys/types.h>
#include <signal.h>
#include <errno.h>

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#if defined(__OpenBSD__)
#include <sys/sysctl.h>
#endif

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#include "gtkmountoperationprivate.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;

      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/<pid>/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 */
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              if (!g_utf8_validate (ret, -1, (const gchar **) &end))
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                *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/<pid>/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 */
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  if (!g_utf8_validate (cmdline_contents, -1, (const gchar **) &end))
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      *end = '\0';

 out:
  g_free (cmdline_filename);

  return cmdline_contents;
}

/* ---------------------------------------------------------------------------------------------------- */
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#elif defined(__OpenBSD__)

/* ---------------------------------------------------------------------------------------------------- */

static GPid
pid_get_parent (GPid pid)
{
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  struct kinfo_proc kp;
  size_t len;
  GPid ppid;

  int mib[] = { CTL_KERN, KERN_PROC, KERN_PROC_PID, pid,
                sizeof(struct kinfo_proc), 0 };
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  if (sysctl (mib, G_N_ELEMENTS (mib), NULL, &len, NULL, 0) == -1)
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      return (-1);
  mib[5] = (len / sizeof(struct kinfo_proc));
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  if (sysctl (mib, G_N_ELEMENTS (mib), &kp, &len, NULL, 0) < 0)
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      return -1;

  ppid = kp.p_ppid;
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  return ppid;
}

static gchar *
pid_get_env (GPid pid, const gchar *key)
{
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  size_t len;
  char **strs;
  char *ret = NULL;
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  char *end;
  int key_len;
  int i;

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  int mib[] = { CTL_KERN, KERN_PROC_ARGS, pid, KERN_PROC_ENV };

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  if (sysctl (mib, G_N_ELEMENTS (mib), NULL, &len, NULL, 0) == -1)
    return ret;

  strs = g_malloc0 (len);
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  key_len = strlen (key);

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  if (sysctl (mib, G_N_ELEMENTS (mib), strs, &len, NULL, 0) != -1)
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    {
      for (i = 0; strs[i] != NULL; i++)
	{
	  if (g_str_has_prefix (strs[i], key) && (*(strs[i] + key_len) == '='))
	    {
	      ret = g_strdup (strs[i] + key_len + 1);

	      /* skip invalid UTF-8 */
	      if (!g_utf8_validate (ret, -1, (const gchar **) &end))
		*end = '\0';
	      break;
	    }
	}
    }

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  g_free (strs);
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  return ret;
}

static gchar *
pid_get_command_line (GPid pid)
{
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  size_t len;
  char **strs;
  char *ret, *end;
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  int mib[] = { CTL_KERN, KERN_PROC_ARGS, pid, KERN_PROC_ARGV };
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  if (sysctl (mib, G_N_ELEMENTS (mib), NULL, &len, NULL, 0) == -1)
    return NULL;

  strs = g_malloc0 (len);
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  if (sysctl (mib, G_N_ELEMENTS (mib), strs, &len, NULL, 0) == -1) {
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    g_free (strs);
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    return NULL;
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  }
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  ret = g_strjoinv (" ", strs);
  /* skip invalid UTF-8 */
  if (!g_utf8_validate (ret, -1, (const gchar **) &end))
    *end = '\0';

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  g_free (strs);
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  return ret;
}

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#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[] =
{
954
  /* translators: this string is a name for the 'less' command */
955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044
  "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)
    {
1045 1046
      int errsv = errno;

1047 1048 1049 1050 1051 1052 1053 1054
      /* 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,
1055
                   g_io_error_from_errno (errsv),
1056
                   _("Cannot end process with PID %d: %s"),
1057
                   pid,
1058
                   g_strerror (errsv));
1059 1060 1061 1062
    }

  return ret;
}