Browser
/* $Id$ */
							/* Copyright (c) 2007-2020 Pierre Pronchery <khorben@defora.org> */
							/* This file is part of DeforaOS Desktop Browser */
							/* Redistribution and use in source and binary forms, with or without
							 * modification, are permitted provided that the following conditions are
							 * met:
							 *
							 * 1. Redistributions of source code must retain the above copyright notice,
							 *    this list of conditions and the following disclaimer.
							 *
							 * 2. Redistributions in binary form must reproduce the above copyright notice,
							 *    this list of conditions and the following disclaimer in the documentation
							 *    and/or other materials provided with the distribution.
							 *
							 * THIS SOFTWARE IS PROVIDED BY ITS AUTHORS AND CONTRIBUTORS "AS IS" AND ANY
							 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
							 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
							 * DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE FOR ANY
							 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
							 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
							 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
							 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
							 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
							 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
							/* TODO:
							 * - re-implement recursive copies */
							#include <sys/types.h>
							#include <sys/stat.h>
							#include <sys/time.h>
							#include <limits.h>
							#include <unistd.h>
							#include <fcntl.h>
							#include <dirent.h>
							#include <stdlib.h>
							#include <stdio.h>
							#include <string.h>
							#include <time.h>
							#include <libgen.h>
							#include <errno.h>
							#include <locale.h>
							#include <libintl.h>
							#include <gtk/gtk.h>
							#include <Desktop.h>
							#include "Browser/vfs.h"
							#include "../config.h"
							#define _(string) gettext(string)
							/* constants */
							#ifndef PROGNAME_COPY
							# define PROGNAME_COPY	"copy"
							#endif
							#ifndef PREFIX
							# define PREFIX		"/usr/local"
							#endif
							#ifndef DATADIR
							# define DATADIR	PREFIX "/share"
							#endif
							#ifndef LOCALEDIR
							# define LOCALEDIR	DATADIR "/locale"
							#endif
							/* Copy */
							/* private */
							/* types */
							typedef int Prefs;
							#define PREFS_f 0x01
							#define PREFS_i 0x02
							#define PREFS_p 0x04
							#define PREFS_R 0x08
							#define PREFS_H 0x10
							#define PREFS_L 0x20
							#define PREFS_P 0x40
							typedef struct _Copy
							{
								Prefs * prefs;
								unsigned int filec;
								char ** filev;
								unsigned int cur;
								struct timeval tv;
								size_t size;
								size_t cnt;
								char buf[65536];
								size_t buf_cnt;
								int eof;
								GIOChannel * in_channel;
								guint in_id;
								GIOChannel * out_channel;
								guint out_id;
								/* widgets */
								GtkWidget * window;
								GtkWidget * filename;
								GtkWidget * progress;
								GtkWidget * flabel;
								GtkWidget * fspeed;
								GtkWidget * fremaining;
								GtkWidget * fprogress;
								int fpulse;			/* tells when to pulse */
							} Copy;
							/* prototypes */
							static int _copy_error(Copy * copy, char const * message, int ret);
							static void _copy_info(Copy * copy, char const * message, char const * info);
							static int _copy_filename_confirm(Copy * copy, char const * filename);
							static int _copy_filename_error(Copy * copy, char const * filename, int ret);
							static void _copy_filename_info(Copy * copy, char const * filename,
									char const * info);
							/* functions */
							/* copy */
							static void _copy_refresh(Copy * copy);
							/* callbacks */
							static void _copy_on_closex(void);
							static void _copy_on_cancel(void);
							static gboolean _copy_idle_first(gpointer data);
							static int _copy(Prefs * prefs, unsigned int filec, char * filev[])
							{
								static Copy copy;
								GtkWidget * vbox;
								GtkWidget * hbox;
								GtkSizeGroup * left;
								GtkSizeGroup * right;
								GtkWidget * widget;
								PangoFontDescription * bold;
								if(filec < 2 || filev == NULL)
									return 1; /* FIXME report error */
								copy.prefs = prefs;
								copy.filec = filec;
								copy.filev = filev;
								copy.cur = 0;
								/* graphical interface */
								copy.window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
								gtk_window_set_icon_name(GTK_WINDOW(copy.window), "stock_copy");
								gtk_window_set_resizable(GTK_WINDOW(copy.window), FALSE);
								gtk_window_set_title(GTK_WINDOW(copy.window), _("Copy file(s)"));
								g_signal_connect(G_OBJECT(copy.window), "delete-event", G_CALLBACK(
										_copy_on_closex), NULL);
								vbox = gtk_box_new(GTK_ORIENTATION_VERTICAL, 4);
								left = gtk_size_group_new(GTK_SIZE_GROUP_HORIZONTAL);
								right = gtk_size_group_new(GTK_SIZE_GROUP_HORIZONTAL);
								/* current argument */
								hbox = gtk_box_new(GTK_ORIENTATION_HORIZONTAL, 4);
								widget = gtk_label_new(_("Copying: "));
								bold = pango_font_description_new();
								pango_font_description_set_weight(bold, PANGO_WEIGHT_BOLD);
							#if GTK_CHECK_VERSION(3, 0, 0)
								gtk_widget_override_font(widget, bold);
								g_object_set(widget, "halign", GTK_ALIGN_START, NULL);
							#else
								gtk_widget_modify_font(widget, bold);
								gtk_misc_set_alignment(GTK_MISC(widget), 0.0, 0.5);
							#endif
								gtk_size_group_add_widget(left, widget);
								gtk_box_pack_start(GTK_BOX(hbox), widget, FALSE, TRUE, 0);
								copy.filename = gtk_entry_new();
								gtk_editable_set_editable(GTK_EDITABLE(copy.filename), FALSE);
								gtk_size_group_add_widget(right, copy.filename);
								gtk_box_pack_start(GTK_BOX(hbox), copy.filename, TRUE, TRUE, 0);
								gtk_box_pack_start(GTK_BOX(vbox), hbox, TRUE, TRUE, 0);
								/* progress bar */
								copy.progress = gtk_progress_bar_new();
							#if GTK_CHECK_VERSION(3, 0, 0)
								gtk_progress_bar_set_show_text(GTK_PROGRESS_BAR(copy.progress), TRUE);
							#endif
								gtk_progress_bar_set_text(GTK_PROGRESS_BAR(copy.progress), "");
								gtk_box_pack_start(GTK_BOX(vbox), copy.progress, TRUE, TRUE, 0);
								/* file copy */
								hbox = gtk_box_new(GTK_ORIENTATION_HORIZONTAL, 4);
								widget = gtk_label_new(_("Filename: "));
							#if GTK_CHECK_VERSION(3, 0, 0)
								gtk_widget_override_font(widget, bold);
								g_object_set(widget, "halign", GTK_ALIGN_START, NULL);
							#else
								gtk_widget_modify_font(widget, bold);
								gtk_misc_set_alignment(GTK_MISC(widget), 0.0, 0.5);
							#endif
								gtk_size_group_add_widget(left, widget);
								gtk_box_pack_start(GTK_BOX(hbox), widget, FALSE, TRUE, 0);
								copy.flabel = gtk_label_new("");
								gtk_label_set_ellipsize(GTK_LABEL(copy.flabel), PANGO_ELLIPSIZE_START);
								gtk_label_set_width_chars(GTK_LABEL(copy.flabel), 25);
							#if GTK_CHECK_VERSION(3, 0, 0)
								g_object_set(copy.flabel, "halign", GTK_ALIGN_START, NULL);
							#else
								gtk_misc_set_alignment(GTK_MISC(copy.flabel), 0.0, 0.5);
							#endif
								gtk_size_group_add_widget(right, copy.flabel);
								gtk_box_pack_start(GTK_BOX(hbox), copy.flabel, TRUE, TRUE, 0);
								gtk_box_pack_start(GTK_BOX(vbox), hbox, TRUE, TRUE, 0);
								/* file copy speed */
								hbox = gtk_box_new(GTK_ORIENTATION_HORIZONTAL, 4);
								widget = gtk_label_new(_("Copied: "));
							#if GTK_CHECK_VERSION(3, 0, 0)
								gtk_widget_override_font(widget, bold);
								g_object_set(widget, "halign", GTK_ALIGN_START, NULL);
							#else
								gtk_widget_modify_font(widget, bold);
								gtk_misc_set_alignment(GTK_MISC(widget), 0.0, 0.5);
							#endif
								gtk_size_group_add_widget(left, widget);
								gtk_box_pack_start(GTK_BOX(hbox), widget, FALSE, TRUE, 0);
								copy.fspeed = gtk_label_new("");
							#if GTK_CHECK_VERSION(3, 0, 0)
								g_object_set(copy.fspeed, "halign", GTK_ALIGN_START, NULL);
							#else
								gtk_misc_set_alignment(GTK_MISC(copy.fspeed), 0.0, 0.5);
							#endif
								gtk_size_group_add_widget(right, copy.fspeed);
								gtk_box_pack_start(GTK_BOX(hbox), copy.fspeed, TRUE, TRUE, 0);
								gtk_box_pack_start(GTK_BOX(vbox), hbox, TRUE, TRUE, 0);
								/* file copy remaining */
								hbox = gtk_box_new(GTK_ORIENTATION_HORIZONTAL, 4);
								widget = gtk_label_new(_("Remaining: "));
							#if GTK_CHECK_VERSION(3, 0, 0)
								gtk_widget_override_font(widget, bold);
								g_object_set(widget, "halign", GTK_ALIGN_START, NULL);
							#else
								gtk_widget_modify_font(widget, bold);
								gtk_misc_set_alignment(GTK_MISC(widget), 0.0, 0.5);
							#endif
								gtk_size_group_add_widget(left, widget);
								gtk_box_pack_start(GTK_BOX(hbox), widget, FALSE, TRUE, 0);
								copy.fremaining = gtk_label_new("");
							#if GTK_CHECK_VERSION(3, 0, 0)
								g_object_set(copy.fremaining, "halign", GTK_ALIGN_START, NULL);
							#else
								gtk_misc_set_alignment(GTK_MISC(copy.fremaining), 0.0, 0.5);
							#endif
								gtk_size_group_add_widget(right, copy.fremaining);
								gtk_box_pack_start(GTK_BOX(hbox), copy.fremaining, TRUE, TRUE, 0);
								gtk_box_pack_start(GTK_BOX(vbox), hbox, TRUE, TRUE, 0);
								/* file progress bar */
								copy.fprogress = gtk_progress_bar_new();
							#if GTK_CHECK_VERSION(3, 0, 0)
								gtk_progress_bar_set_show_text(GTK_PROGRESS_BAR(copy.fprogress), TRUE);
							#endif
								gtk_progress_bar_set_text(GTK_PROGRESS_BAR(copy.fprogress), "");
								gtk_box_pack_start(GTK_BOX(vbox), copy.fprogress, TRUE, TRUE, 0);
								hbox = gtk_box_new(GTK_ORIENTATION_HORIZONTAL, 4);
								widget = gtk_button_new_from_stock(GTK_STOCK_CANCEL);
								g_signal_connect_swapped(G_OBJECT(widget), "clicked", G_CALLBACK(
											_copy_on_cancel), NULL);
								gtk_box_pack_end(GTK_BOX(hbox), widget, FALSE, FALSE, 0);
								gtk_box_pack_start(GTK_BOX(vbox), hbox, FALSE, TRUE, 0);
								gtk_container_set_border_width(GTK_CONTAINER(copy.window), 4);
								gtk_container_add(GTK_CONTAINER(copy.window), vbox);
								g_idle_add(_copy_idle_first, ©);
								_copy_refresh(©);
								gtk_widget_show_all(copy.window);
								pango_font_description_free(bold);
								return 0;
							}
							static void _copy_refresh(Copy * copy)
							{
								char const * filename = copy->filev[copy->cur];
								char * p;
								char buf[64];
								double fraction;
								if((p = g_filename_to_utf8(filename, -1, NULL, NULL, NULL)) != NULL)
									filename = p;
								gtk_entry_set_text(GTK_ENTRY(copy->filename), filename);
								free(p);
								snprintf(buf, sizeof(buf), _("File %u of %u"), copy->cur + 1,
										copy->filec - 1);
								fraction = copy->cur;
								fraction /= copy->filec - 1;
								gtk_progress_bar_set_text(GTK_PROGRESS_BAR(copy->progress), buf);
								gtk_progress_bar_set_fraction(GTK_PROGRESS_BAR(copy->progress),
										fraction);
							}
							static void _copy_on_closex(void)
							{
								/* FIXME does not work anymore */
								gtk_main_quit();
							}
							static void _copy_on_cancel(void)
							{
								/* FIXME does not work anymore */
								gtk_main_quit();
							}
							static int _copy_single(Copy * copy, char const * src, char const * dst);
							static gboolean _copy_idle_multiple(gpointer data);
							static gboolean _copy_idle_first(gpointer data)
							{
								Copy * copy = data;
								char const * filename = copy->filev[copy->filec - 1];
								struct stat st;
								if(browser_vfs_stat(filename, &st) != 0)
								{
									if(errno != ENOENT)
										_copy_filename_error(copy, filename, 0);
									else if(copy->filec > 2)
									{
										errno = ENOTDIR;
										_copy_filename_error(copy, filename, 0);
									}
									else
										_copy_single(copy, copy->filev[0], copy->filev[1]);
								}
								else if(S_ISDIR(st.st_mode))
								{
									g_idle_add(_copy_idle_multiple, copy);
									return FALSE;
								}
								else if(copy->filec > 2)
								{
									errno = ENOTDIR;
									_copy_filename_error(copy, filename, 0);
								}
								else
									_copy_single(copy, copy->filev[0], copy->filev[1]);
								gtk_main_quit();
								return FALSE;
							}
							/* copy_single
							 * XXX TOCTOU all over the place (*stat) but seems impossible to avoid */
							static int _single_dir(Copy * copy, char const * src, char const * dst,
									mode_t mode);
							static int _single_fifo(Copy * copy, char const * dst, mode_t mode);
							static int _single_nod(Copy * copy, char const * src, char const * dst,
									mode_t mode, dev_t rdev);
							static int _single_symlink(Copy * copy, char const * src, char const * dst);
							static int _single_regular(Copy * copy, char const * src, char const * dst,
									mode_t mode);
							static int _single_p(Copy * copy, char const * dst, struct stat const * st);
							static void _single_remaining(Copy * copy, guint64 rate);
							static gboolean _single_timeout(gpointer data);
							static void _single_unit(guint64 size, double * fraction, char const ** unit,
									double * current);
							static int _copy_single(Copy * copy, char const * src, char const * dst)
							{
								int ret;
								char * p;
								struct stat st;
								struct stat st2;
								guint timeout;
								if((p = g_filename_to_utf8(src, -1, NULL, NULL, NULL)) != NULL)
									gtk_label_set_text(GTK_LABEL(copy->flabel), p);
								else
									gtk_label_set_text(GTK_LABEL(copy->flabel), src);
								free(p);
								gtk_progress_bar_set_fraction(GTK_PROGRESS_BAR(copy->fprogress), 0.0);
								gtk_progress_bar_set_text(GTK_PROGRESS_BAR(copy->fprogress), "");
								if(*(copy->prefs) & PREFS_P)
								{
									/* do not follow symlinks */
									if(browser_vfs_lstat(src, &st) != 0 && errno == ENOENT)
										return _copy_filename_error(copy, src, 1);
								}
								else if(browser_vfs_stat(src, &st) != 0 && errno == ENOENT)
									/* follow symlinks */
									return _copy_filename_error(copy, src, 1);
								if(browser_vfs_lstat(dst, &st2) == 0)
								{
									if(st.st_dev == st2.st_dev && st.st_ino == st2.st_ino)
									{
										fprintf(stderr, "%s: %s: \"%s\"%s\n", PROGNAME_COPY,
												dst, src,
												_(" is identical (not copied)"));
										return 0;
									}
									if(*(copy->prefs) & PREFS_i
											&& _copy_filename_confirm(copy, dst) != 1)
										return 0;
									if(unlink(dst) != 0)
										return _copy_filename_error(copy, dst, 1);
								}
								if(S_ISDIR(st.st_mode))
									ret = _single_dir(copy, src, dst, st.st_mode & 0777);
								else if(S_ISFIFO(st.st_mode))
									ret = _single_fifo(copy, dst, st.st_mode & 0666);
								else if(S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode))
									ret = _single_nod(copy, src, dst, st.st_mode, st.st_rdev);
								else if(S_ISLNK(st.st_mode))
									ret = _single_symlink(copy, src, dst);
								else if(S_ISREG(st.st_mode))
								{
									ret = _single_regular(copy, src, dst, st.st_mode & 0777);
									timeout = g_timeout_add(250, _single_timeout, copy);
									gtk_main(); /* XXX ugly */
									g_source_remove(timeout);
								}
								else
								{
									errno = ENOSYS;
									return _copy_error(copy, src, 1);
								}
								if(ret != 0)
									return ret;
								if(*(copy->prefs) & PREFS_p) /* XXX TOCTOU */
									_single_p(copy, dst, &st);
								return 0;
							}
							/* single_dir */
							static int _single_recurse(Copy * copy, char const * src, char const * dst,
									mode_t mode);
							static int _single_dir(Copy * copy, char const * src, char const * dst,
									mode_t mode)
							{
								if(*(copy->prefs) & PREFS_R)
									return _single_recurse(copy, src, dst, mode);
								_copy_filename_info(copy, src, _("Omitting directory"));
								return 0;
							}
							static int _single_recurse(Copy * copy, char const * src, char const * dst,
									mode_t mode)
							{
								int ret = 0;
								Copy copy2;
								Prefs prefs2 = *(copy->prefs);
								size_t srclen;
								size_t dstlen;
								DIR * dir;
								struct dirent * de;
								char * ssrc = NULL;
								char * sdst = NULL;
								char * p;
								memcpy(©2, copy, sizeof(copy2));
								copy2.prefs = &prefs2;
								if(browser_vfs_mkdir(dst, mode) != 0 && errno != EEXIST)
									return _copy_filename_error(copy, dst, 1);
								srclen = strlen(src);
								dstlen = strlen(dst);
								if((dir = browser_vfs_opendir(src, NULL)) == NULL)
									return _copy_filename_error(copy, src, 1);
								prefs2 |= (prefs2 & PREFS_H) ? PREFS_P : 0;
								while((de = browser_vfs_readdir(dir)) != NULL)
								{
									if(de->d_name[0] == '.' && (de->d_name[1] == '\0'
												|| (de->d_name[1] == '.'
													&& de->d_name[2] == '\0')))
										continue;
									if((p = realloc(ssrc, srclen + strlen(de->d_name) + 2)) == NULL)
									{
										ret |= _copy_filename_error(copy, src, 1);
										continue;
									}
									ssrc = p;
									if((p = realloc(sdst, dstlen + strlen(de->d_name) + 2)) == NULL)
									{
										ret |= _copy_filename_error(copy, src, 1);
										continue;
									}
									sdst = p;
									sprintf(ssrc, "%s/%s", src, de->d_name);
									sprintf(sdst, "%s/%s", dst, de->d_name);
									ret |= _copy_single(©2, ssrc, sdst);
								}
								browser_vfs_closedir(dir);
								free(ssrc);
								free(sdst);
								return ret;
							}
							static int _single_fifo(Copy * copy, char const * dst, mode_t mode)
							{
								if(mkfifo(dst, mode) != 0)
									return _copy_filename_error(copy, dst, 1);
								return 0;
							}
							static int _single_nod(Copy * copy, char const * src, char const * dst,
									mode_t mode, dev_t rdev)
							{
								if(mknod(dst, mode, rdev) != 0)
									return _copy_error(copy, dst, 1);
								if(unlink(src) != 0)
									_copy_error(copy, src, 0);
								return 0;
							}
							static int _single_symlink(Copy * copy, char const * src, char const * dst)
							{
								char buf[PATH_MAX];
								ssize_t len;
								if((len = readlink(src, buf, sizeof(buf) - 1)) == -1)
									return _copy_filename_error(copy, src, 1);
								buf[len] = '\0';
								if(symlink(buf, dst) != 0)
									return _copy_filename_error(copy, dst, 1);
								return 0;
							}
							static gboolean _regular_idle_in(gpointer data);
							static gboolean _regular_idle_out(gpointer data);
							static int _single_regular(Copy * copy, char const * src, char const * dst,
									mode_t mode)
							{
								int ret = 0;
								int in_fd;
								int out_fd;
								struct stat st;
								if(gettimeofday(©->tv, NULL) != 0)
									return _copy_error(copy, "gettimeofday", 1);
								if((in_fd = open(src, O_RDONLY)) < 0)
									return _copy_filename_error(copy, src, 1);
								if((out_fd = open(dst, O_WRONLY | O_CREAT | O_TRUNC, mode)) < 0)
								{
									ret = _copy_filename_error(copy, src, 1);
									close(in_fd);
									return ret;
								}
								copy->size = 0;
								if(fstat(in_fd, &st) == 0)
									copy->size = st.st_size;
								copy->cnt = 0;
								copy->buf_cnt = 0;
								copy->eof = 0;
								copy->in_channel = g_io_channel_unix_new(in_fd);
								g_io_channel_set_encoding(copy->in_channel, NULL, NULL);
								copy->in_id = 0;
								g_idle_add(_regular_idle_in, copy);
								copy->out_channel = g_io_channel_unix_new(out_fd);
								g_io_channel_set_encoding(copy->out_channel, NULL, NULL);
								copy->out_id = 0;
								return ret;
							}
							static gboolean _regular_channel(GIOChannel * source, GIOCondition condition,
									gpointer data);
							static gboolean _channel_in(Copy * copy, GIOChannel * source);
							static gboolean _channel_in_error(Copy * copy, GIOChannel * source,
									GError * error);
							static gboolean _channel_out(Copy * copy, GIOChannel * source);
							static gboolean _channel_out_error(Copy * copy, GIOChannel * source,
									GError * error);
							static void _out_rate(Copy * copy);
							static gboolean _regular_idle_in(gpointer data)
							{
								Copy * copy = data;
								if(copy->in_id == 0)
									copy->in_id = g_io_add_watch(copy->in_channel, G_IO_IN,
											_regular_channel, copy);
								return FALSE;
							}
							static gboolean _regular_channel(GIOChannel * source, GIOCondition condition,
									gpointer data)
							{
								Copy * copy = data;
								if(condition == G_IO_IN)
									return _channel_in(copy, source);
								else if(condition == G_IO_OUT)
									return _channel_out(copy, source);
								_copy_filename_error(copy, copy->filev[copy->cur], 0);
								gtk_main_quit();
								return FALSE;
							}
							static gboolean _channel_in(Copy * copy, GIOChannel * source)
							{
								GIOStatus status;
								gsize read;
								GError * error = NULL;
								copy->in_id = 0;
								status = g_io_channel_read_chars(source, ©->buf[copy->buf_cnt],
										sizeof(copy->buf) - copy->buf_cnt, &read, &error);
								if(status == G_IO_STATUS_ERROR)
									return _channel_in_error(copy, source, error);
								else if(status == G_IO_STATUS_EOF)
								{
									copy->eof = 1; /* reached end of input file */
									if(g_io_channel_shutdown(source, TRUE, &error)
											== G_IO_STATUS_ERROR)
										return _channel_in_error(copy, source, error);
								}
								else if(copy->buf_cnt + read != sizeof(copy->buf))
									g_idle_add(_regular_idle_in, copy); /* continue to read */
								if(copy->buf_cnt == 0)
									g_idle_add(_regular_idle_out, copy); /* begin to write */
								copy->buf_cnt += read;
								return FALSE;
							}
							static gboolean _channel_in_error(Copy * copy, GIOChannel * source,
									GError * error)
							{
								_copy_filename_error(copy, copy->filev[copy->cur], 0);
								g_error_free(error);
								g_io_channel_unref(source);
								gtk_main_quit(); /* XXX ugly */
								return FALSE;
							}
							static gboolean _channel_out(Copy * copy, GIOChannel * source)
							{
								gsize written;
								GError * error = NULL;
								copy->out_id = 0;
								/* write data */
								if(g_io_channel_write_chars(source, copy->buf, copy->buf_cnt, &written,
											&error) == G_IO_STATUS_ERROR)
									return _channel_out_error(copy, source, error);
								if(fsync(g_io_channel_unix_get_fd(source)) != 0)
									_copy_error(NULL, "fsync", -errno);
								if(copy->buf_cnt == sizeof(copy->buf))
									g_idle_add(_regular_idle_in, copy); /* read again */
								copy->buf_cnt -= written;
								memmove(copy->buf, ©->buf[written], copy->buf_cnt);
								copy->cnt += written;
								_out_rate(copy);
								if(copy->buf_cnt > 0)
									g_idle_add(_regular_idle_out, copy); /* continue to write */
								else if(copy->eof == 1) /* reached end of input */
								{
									if(g_io_channel_shutdown(copy->out_channel, TRUE, &error)
											== G_IO_STATUS_ERROR)
										return _channel_out_error(copy, source, error);
									gtk_main_quit(); /* XXX ugly */
								}
								return FALSE;
							}
							static gboolean _channel_out_error(Copy * copy, GIOChannel * source,
									GError * error)
							{
								(void) source;
								_copy_filename_error(copy, copy->filev[copy->cur], 0);
								g_error_free(error);
								gtk_main_quit(); /* XXX ugly */
								return FALSE;
							}
							static void _out_rate(Copy * copy)
							{
								gdouble fraction;
								GtkProgressBar * bar = GTK_PROGRESS_BAR(copy->fprogress);
								char buf[16];
								if(copy->size == 0 || copy->cnt == 0)
								{
									copy->fpulse = 1;
									return;
								}
								fraction = copy->cnt;
								fraction /= copy->size;
								if(gtk_progress_bar_get_fraction(bar) == fraction)
									return;
								gtk_progress_bar_set_fraction(bar, fraction);
								snprintf(buf, sizeof(buf), "%.1f%%", fraction * 100);
								gtk_progress_bar_set_text(bar, buf);
							}
							static gboolean _regular_idle_out(gpointer data)
							{
								Copy * copy = data;
								if(copy->out_id == 0)
									copy->out_id = g_io_add_watch(copy->out_channel, G_IO_OUT,
											_regular_channel, copy);
								return FALSE;
							}
							static int _single_p(Copy * copy, char const * dst, struct stat const * st)
							{
								struct timeval tv[2];
								if(lchown(dst, st->st_uid, st->st_gid) != 0)
								{
									_copy_filename_error(copy, dst, 0);
									if(lchmod(dst, st->st_mode & ~(S_ISUID | S_ISGID)) != 0)
										_copy_filename_error(copy, dst, 0);
								}
								else if(lchmod(dst, st->st_mode) != 0)
									_copy_filename_error(copy, dst, 0);
								tv[0].tv_sec = st->st_atime;
								tv[0].tv_usec = 0;
								tv[1].tv_sec = st->st_mtime;
								tv[1].tv_usec = 0;
								if(lutimes(dst, tv) != 0)
									_copy_filename_error(copy, dst, 0);
								return 0;
							}
							static void _single_remaining(Copy * copy, guint64 rate)
							{
								char buf[32];
								guint64 remaining;
								struct tm tm;
								if(rate == 0)
									return;
								remaining = (copy->size - copy->cnt) / rate;
								memset(&tm, 0, sizeof(tm));
								tm.tm_sec = remaining;
								/* minutes */
								if(tm.tm_sec > 60)
								{
									tm.tm_min = tm.tm_sec / 60;
									tm.tm_sec = tm.tm_sec - (tm.tm_min * 60);
								}
								/* hours */
								if(tm.tm_min > 60)
								{
									tm.tm_hour = tm.tm_min / 60;
									tm.tm_min = tm.tm_min - (tm.tm_hour * 60);
								}
								strftime(buf, sizeof(buf), "%H:%M:%S", &tm);
								gtk_label_set_text(GTK_LABEL(copy->fremaining), buf);
							}
							static gboolean _single_timeout(gpointer data)
							{
								Copy * copy = data;
								struct timeval tv;
								char buf[32];
								guint64 rate;
								double rate_fraction;
								char const * rate_unit;
								double total_fraction;
								char const * total_unit;
								double current_fraction;
								if(copy->fpulse == 1)
								{
									gtk_progress_bar_pulse(GTK_PROGRESS_BAR(copy->fprogress));
									copy->fpulse = 0;
								}
								if(copy->cnt == 0)
								{
									gtk_label_set_text(GTK_LABEL(copy->fspeed), _("0 bytes"));
									return TRUE;
								}
								if(gettimeofday(&tv, NULL) != 0)
									return _copy_error(copy, "gettimeofday", FALSE);
								if((tv.tv_sec = tv.tv_sec - copy->tv.tv_sec) < 0)
									tv.tv_sec = 0;
								if((tv.tv_usec = tv.tv_usec - copy->tv.tv_usec) < 0)
								{
									tv.tv_sec--;
									tv.tv_usec += 1000000;
								}
								rate = (copy->cnt * 1024) / ((tv.tv_sec * 1000) + (tv.tv_usec / 1000));
								_single_unit(rate, &rate_fraction, &rate_unit, NULL);
								current_fraction = copy->cnt;
								_single_unit(copy->size, &total_fraction, &total_unit,
										¤t_fraction);
								snprintf(buf, sizeof(buf), _("%.1f of %.1f %s (%.1f %s/s)"),
										current_fraction, total_fraction, total_unit,
										rate_fraction, rate_unit);
								gtk_label_set_text(GTK_LABEL(copy->fspeed), buf);
								_single_remaining(copy, rate);
								return TRUE;
							}
							static void _single_unit(guint64 size, double * fraction, char const ** unit,
									double * current)
							{
								/* bytes */
								*fraction = size;
								*unit = _("bytes");
								if(*fraction < 1024)
									return;
								/* kilobytes */
								*fraction /= 1024;
								if(current)
									*current /= 1024;
								*unit = _("kB");
								if(*fraction < 1024)
									return;
								/* megabytes */
								*fraction /= 1024;
								if(current)
									*current /= 1024;
								*unit = _("MB");
								if(*fraction < 1024)
									return;
								/* gigabytes */
								*fraction /= 1024;
								if(current)
									*current /= 1024;
								*unit = _("GB");
							}
							static int _copy_multiple(Copy * copy, char const * src, char const * dst);
							static gboolean _copy_idle_multiple(gpointer data)
							{
								Copy * copy = data;
								_copy_multiple(copy, copy->filev[copy->cur],
										copy->filev[copy->filec - 1]);
								copy->cur++;
								if(copy->cur == copy->filec - 1)
								{
									gtk_main_quit();
									return FALSE;
								}
								_copy_refresh(copy);
								return TRUE;
							}
							static int _copy_multiple(Copy * copy, char const * src, char const * dst)
							{
								int ret;
								char * to;
								size_t len;
								char * p;
								char * q;
								if((p = strdup(src)) == NULL)
									return _copy_filename_error(copy, src, 1);
								to = basename(p);
								len = strlen(dst) + strlen(to) + 2;
								if((q = malloc(len)) == NULL)
								{
									free(p);
									return _copy_filename_error(copy, src, 1);
								}
								snprintf(q, len, "%s/%s", dst, to);
								ret = _copy_single(copy, src, q);
								free(p);
								free(q);
								return ret;
							}
							/* copy_error */
							static int _error_text(char const * message, int ret);
							static int _copy_error(Copy * copy, char const * message, int ret)
							{
								GtkWidget * dialog;
								int error = errno;
								if(copy == NULL)
									return _error_text(message, ret);
								dialog = gtk_message_dialog_new(GTK_WINDOW(copy->window),
										GTK_DIALOG_MODAL, GTK_MESSAGE_ERROR, GTK_BUTTONS_OK,
							#if GTK_CHECK_VERSION(2, 6, 0)
										"%s", _("Error"));
								gtk_message_dialog_format_secondary_text(GTK_MESSAGE_DIALOG(dialog),
							#endif
										"%s: %s", message, strerror(error));
								gtk_window_set_title(GTK_WINDOW(dialog), _("Error"));
								gtk_dialog_run(GTK_DIALOG(dialog));
								gtk_widget_destroy(dialog);
								return ret;
							}
							static int _error_text(char const * message, int ret)
							{
								fputs(PROGNAME_COPY ": ", stderr);
								perror(message);
								return ret;
							}
							/* copy_filename_confirm */
							static int _copy_filename_confirm(Copy * copy, char const * filename)
							{
								char * p;
								GtkWidget * dialog;
								int res;
								if((p = g_filename_to_utf8(filename, -1, NULL, NULL, NULL)) != NULL)
									filename = p;
								dialog = gtk_message_dialog_new(GTK_WINDOW(copy->window),
										GTK_DIALOG_MODAL, GTK_MESSAGE_QUESTION,
										GTK_BUTTONS_YES_NO,
							#if GTK_CHECK_VERSION(2, 6, 0)
										"%s", _("Question"));
								gtk_message_dialog_format_secondary_text(GTK_MESSAGE_DIALOG(dialog),
							#endif
										_("%s will be overwritten\nProceed?"), filename);
								gtk_window_set_title(GTK_WINDOW(dialog), _("Question"));
								res = gtk_dialog_run(GTK_DIALOG(dialog));
								gtk_widget_destroy(dialog);
								free(p);
								return (res == GTK_RESPONSE_YES) ? 1 : 0;
							}
							/* copy_filename_error */
							static int _copy_filename_error(Copy * copy, char const * filename, int ret)
							{
								char * p;
								int error = errno;
								if((p = g_filename_to_utf8(filename, -1, NULL, NULL, NULL)) != NULL)
									filename = p;
								errno = error;
								ret = _copy_error(copy, filename, ret);
								free(p);
								return ret;
							}
							/* copy_info */
							static void _copy_info(Copy * copy, char const * message, char const * info)
							{
								GtkWidget * dialog;
								dialog = gtk_message_dialog_new(GTK_WINDOW(copy->window),
										GTK_DIALOG_MODAL, GTK_MESSAGE_INFO, GTK_BUTTONS_OK,
							#if GTK_CHECK_VERSION(2, 6, 0)
										"%s", _("Information"));
								gtk_message_dialog_format_secondary_text(GTK_MESSAGE_DIALOG(dialog),
							#endif
										"%s: %s", message, info);
								gtk_window_set_title(GTK_WINDOW(dialog), _("Information"));
								gtk_dialog_run(GTK_DIALOG(dialog));
								gtk_widget_destroy(dialog);
							}
							/* copy_filename_info */
							static void _copy_filename_info(Copy * copy, char const * filename,
									char const * info)
							{
								char * p;
								if((p = g_filename_to_utf8(filename, -1, NULL, NULL, NULL)) != NULL)
									filename = p;
								_copy_info(copy, filename, info);
								free(p);
							}
							/* usage */
							static int _usage(void)
							{
								fprintf(stderr, _("Usage: %s [-fip] source_file target_file\n\
							       %s [-fip] source_file ... target\n\
							       %s -R [-H | -L | -P][-fip] source_file ... target\n\
							       %s -r [-H | -L | -P][-fip] source_file ... target\n\
							  -f	Do not prompt for confirmation if the destination path exists\n\
							  -i	Prompt for confirmation if the destination path exists\n\
							  -p	Duplicate characteristics of the source files\n\
							  -R	Copy file hierarchies\n\
							  -r	Copy file hierarchies\n"), PROGNAME_COPY, PROGNAME_COPY, PROGNAME_COPY,
										PROGNAME_COPY);
								return 1;
							}
							/* public */
							/* functions */
							/* main */
							int main(int argc, char * argv[])
							{
								Prefs prefs;
								int o;
								if(setlocale(LC_ALL, "") == NULL)
									_copy_error(NULL, "setlocale", 1);
								bindtextdomain(PACKAGE, LOCALEDIR);
								textdomain(PACKAGE);
								memset(&prefs, 0, sizeof(prefs));
								prefs = PREFS_i;
								gtk_init(&argc, &argv);
								while((o = getopt(argc, argv, "fipRrHLP")) != -1)
									switch(o)
									{
										case 'f':
											prefs -= prefs & PREFS_i;
											prefs |= PREFS_f;
											break;
										case 'i':
											prefs -= prefs & PREFS_f;
											prefs |= PREFS_i;
											break;
										case 'p':
											prefs |= PREFS_p;
											break;
										case 'R':
										case 'r':
											prefs |= PREFS_R;
											break;
										case 'H':
											prefs -= prefs & (PREFS_L | PREFS_P);
											prefs |= PREFS_H;
											break;
										case 'L':
											prefs -= prefs & (PREFS_H | PREFS_P);
											prefs |= PREFS_L;
											break;
										case 'P':
											prefs -= prefs & (PREFS_H | PREFS_L);
											prefs |= PREFS_P;
											break;
										default:
											return _usage();
									}
								if(argc - optind < 2)
									return _usage();
								if((prefs & (PREFS_H | PREFS_L | PREFS_P)) == 0)
									prefs |= (prefs & PREFS_R) ? PREFS_P : PREFS_H;
								_copy(&prefs, argc - optind, &argv[optind]);
								gtk_main();
								return 0;
							}
							