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* Copyright (c) 2021 Omar Polo <op@omarpolo.com>
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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#include "compat.h"
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#include <errno.h>
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#include <fcntl.h>
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#include <limits.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#include <unistd.h>
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#include "defaults.h"
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#include "fs.h"
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#include "minibuffer.h"
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#include "session.h"
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#include "ui.h"
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struct history history;
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static struct event autosaveev;
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switch_to_tab(struct tab *tab)
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current_tab = tab;
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tab->flags &= ~TAB_URGENT;
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if (operating && tab->flags & TAB_LAZY)
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load_url_in_tab(tab, tab->hist_cur->h, NULL, LU_MODE_NOHIST);
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unsigned int
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tab_new_id(void)
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static uint32_t tab_counter;
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return tab_counter++;
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struct tab *
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new_tab(const char *url, const char *base, struct tab *after)
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struct tab *tab;
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ui_schedule_redraw();
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autosave_hook();
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if ((tab = calloc(1, sizeof(*tab))) == NULL) {
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event_loopbreak();
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return NULL;
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TAILQ_INIT(&tab->hist.head);
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TAILQ_INIT(&tab->buffer.head);
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TAILQ_INIT(&tab->buffer.page.head);
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evtimer_set(&tab->loadingev, NULL, NULL);
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tab->id = tab_new_id();
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if (after != NULL)
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TAILQ_INSERT_AFTER(&tabshead, after, tab, tabs);
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TAILQ_INSERT_TAIL(&tabshead, tab, tabs);
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if (!operating)
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tab->flags |= TAB_LAZY;
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load_url_in_tab(tab, url, base, 0);
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switch_to_tab(tab);
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return tab;
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* Move a tab from the tablist to the killed tab list and erase its
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* contents. Append should always be 0 to prepend tabs so unkill_tab
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* can work correctly; appending is only useful during startup when
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* receiving the list of killed tabs to keep the correct order.
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* NB: doesn't update the current_tab.
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kill_tab(struct tab *tab, int append)
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int count;
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stop_tab(tab);
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erase_buffer(&tab->buffer);
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TAILQ_REMOVE(&tabshead, tab, tabs);
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ui_schedule_redraw();
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autosave_hook();
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if (evtimer_pending(&tab->loadingev, NULL))
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evtimer_del(&tab->loadingev);
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if (append)
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TAILQ_INSERT_TAIL(&ktabshead, tab, tabs);
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TAILQ_INSERT_HEAD(&ktabshead, tab, tabs);
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/* gc closed tabs */
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count = 0;
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TAILQ_FOREACH(tab, &ktabshead, tabs)
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while (count > max_killed_tabs) {
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free_tab(TAILQ_LAST(&ktabshead, tabshead));
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* Resurrects the lastest killed tab and returns it. The tab is already
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* added to the tab list with the TAB_LAZY flag set. NB: this doesn't
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* update current_tab.
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struct tab *
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unkill_tab(void)
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struct tab *t;
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if (TAILQ_EMPTY(&ktabshead))
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return NULL;
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ui_schedule_redraw();
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autosave_hook();
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t = TAILQ_FIRST(&ktabshead);
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TAILQ_REMOVE(&ktabshead, t, tabs);
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TAILQ_INSERT_TAIL(&tabshead, t, tabs);
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t->flags |= TAB_LAZY;
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return t;
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* Free every resource linked to the tab, including the tab itself, and
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* removes it from the *killed* tablist.
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free_tab(struct tab *tab)
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TAILQ_REMOVE(&ktabshead, tab, tabs);
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hist_clear(&tab->hist);
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free(tab);
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stop_tab(struct tab *tab)
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ui_send_net(IMSG_STOP, tab->id, NULL, 0);
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static inline void
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savetab(FILE *fp, struct tab *tab, int killed)
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struct hist *h;
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size_t top_line, current_line;
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int future;
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get_scroll_position(tab, &top_line, ¤t_line);
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fprintf(fp, "%s ", tab->hist_cur->h);
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if (tab == current_tab)
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fprintf(fp, "current,");
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if (killed)
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fprintf(fp, "killed,");
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fprintf(fp, "top=%zu,cur=%zu %s\n", top_line, current_line,
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tab->buffer.page.title);
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future = 0;
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TAILQ_FOREACH(h, &tab->hist.head, entries) {
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if (h == tab->hist_cur) {
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future = 1;
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continue;
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fprintf(fp, "%s %s\n", future ? ">" : "<", h->h);
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static void
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save_tabs(void)
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FILE *fp;
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struct tab *tab;
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int fd, err;
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char sfn[PATH_MAX];
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strlcpy(sfn, session_file_tmp, sizeof(sfn));
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if ((fd = mkstemp(sfn)) == -1 ||
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(fp = fdopen(fd, "w")) == NULL) {
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if (fd != -1) {
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unlink(sfn);
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close(fd);
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TAILQ_FOREACH(tab, &tabshead, tabs)
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savetab(fp, tab, 0);
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TAILQ_FOREACH(tab, &ktabshead, tabs)
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savetab(fp, tab, 1);
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err = fflush(fp) == EOF;
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fclose(fp);
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if (err || rename(sfn, session_file) == -1)
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unlink(sfn);
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static void
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save_all_history(void)
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FILE *fp;
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size_t i;
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int fd, err;
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char sfn[PATH_MAX];
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strlcpy(sfn, history_file_tmp, sizeof(sfn));
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if ((fd = mkstemp(sfn)) == -1 ||
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(fp = fdopen(fd, "w")) == NULL) {
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if (fd != -1) {
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unlink(sfn);
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close(fd);
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for (i = 0; i < history.len; ++i) {
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history.items[i].dirty = 0;
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fprintf(fp, "%lld %s\n", (long long)history.items[i].ts,
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history.items[i].uri);
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err = fflush(fp) == EOF;
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fclose(fp);
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if (err || rename(sfn, history_file) == -1) {
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unlink(sfn);
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history.dirty = 0;
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history.extra = 0;
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static void
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save_dirty_history(void)
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FILE *fp;
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size_t i;
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if ((fp = fopen(history_file, "a")) == NULL)
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for (i = 0; i < history.len && history.dirty > 0; ++i) {
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if (!history.items[i].dirty)
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continue;
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history.dirty--;
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history.items[i].dirty = 0;
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fprintf(fp, "%lld %s\n", (long long)history.items[i].ts,
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history.items[i].uri);
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history.dirty = 0;
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fclose(fp);
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save_session(void)
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if (safe_mode)
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save_tabs();
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if (history.extra > HISTORY_CAP/2)
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save_all_history();
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else if (history.dirty)
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save_dirty_history();
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history_push(struct histitem *hi)
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size_t i, oldest = 0;
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char *uri;
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for (i = 0; i < history.len; ++i) {
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if (history.items[i].ts < history.items[oldest].ts)
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oldest = i;
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/* remove duplicates */
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if (!strcmp(history.items[i].uri, hi->uri))
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if ((uri = strdup(hi->uri)) == NULL)
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/* don't grow too much; replace the oldest */
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if (history.len == HISTORY_CAP) {
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history.items[oldest].ts = hi->ts;
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free(history.items[oldest].uri);
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history.items[oldest].uri = uri;
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/* Growed past the max value, signal to regen the file. */
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history.extra++;
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history.items[history.len].ts = hi->ts;
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history.items[history.len].uri = uri;
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history.len++;
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static int
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history_cmp(const void *a, const void *b)
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const struct history_item *i = a, *j = b;
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return strcmp(i->uri, j->uri);
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history_sort(void)
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qsort(history.items, history.len, sizeof(history.items[0]),
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history_cmp);
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history_add(const char *uri)
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size_t i, j, insert = 0, oldest = 0;
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for (i = 0; i < history.len; ++i) {
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if (history.items[i].ts < history.items[oldest].ts)
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oldest = i;
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if (insert != 0 && insert < i)
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continue;
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c = strcmp(uri, history.items[i].uri);
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if (c == 0) {
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history.items[i].ts = time(NULL);
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history.items[i].dirty = 1;
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history.dirty++;
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autosave_hook();
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if (c > 0)
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insert = i;
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if ((u = strdup(uri)) == NULL)
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/* if history is full, replace the oldest one */
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if (history.len == HISTORY_CAP) {
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free(history.items[oldest].uri);
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history.items[oldest].uri = u;
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history.items[oldest].ts = time(NULL);
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history.items[oldest].dirty = 1;
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history.dirty++;
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history_sort();
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autosave_hook();
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/* otherwise just insert in the right spot */
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for (j = history.len; j > insert; --j)
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memcpy(&history.items[j], &history.items[j-1],
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sizeof(history.items[j]));
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history.items[insert].ts = time(NULL);
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history.items[insert].uri = u;
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history.items[insert].dirty = 1;
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history.dirty++;
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history.len++;
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autosave_hook();
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autosave_init(void)
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evtimer_set(&autosaveev, autosave_timer, NULL);
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autosave_timer(int fd, short event, void *data)
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save_session();
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* Function to be called in "interesting" places where we may want to
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* schedule an autosave (like on new tab or before loading an url.)
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autosave_hook(void)
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struct timeval tv;
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if (autosave <= 0)
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if (!evtimer_pending(&autosaveev, NULL)) {
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tv.tv_sec = autosave;
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tv.tv_usec = 0;
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evtimer_add(&autosaveev, &tv);
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static inline int
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parse_khost_line(char *line, char *tmp[3])
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char **ap;
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for (ap = tmp; ap < &tmp[3] &&
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(*ap = strsep(&line, " \t\n")) != NULL;) {
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if (**ap != '\0')
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return ap == &tmp[3] && *line == '\0';
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static void
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load_certs(struct ohash *certs)
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char *tmp[3], *line = NULL;
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const char *errstr;
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size_t lineno = 0, linesize = 0;
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ssize_t linelen;
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struct tofu_entry *e;
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if ((f = fopen(known_hosts_file, "r")) == NULL)
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op
if ((e = calloc(1, sizeof(*e))) == NULL) {
460
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op
fclose(f);
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while ((linelen = getline(&line, &linesize, f)) != -1) {
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op
lineno++;
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op
if (parse_khost_line(line, tmp)) {
468
2022-04-24
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strlcpy(e->domain, tmp[0], sizeof(e->domain));
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2022-04-24
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strlcpy(e->hash, tmp[1], sizeof(e->hash));
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e->verified = strtonum(tmp[2], 0, 1, &errstr);
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if (errstr != NULL)
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errx(1, "%s:%zu verification for %s is %s: %s",
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known_hosts_file, lineno,
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op
e->domain, errstr, tmp[2]);
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tofu_add(certs, e);
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warnx("%s:%zu invalid entry",
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op
known_hosts_file, lineno);
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free(line);
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op
fclose(f);
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static void
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load_hist(void)
492
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FILE *hist;
493
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size_t linesize = 0;
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op
ssize_t linelen;
495
2022-04-24
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char *nl, *spc, *line = NULL;
496
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const char *errstr;
497
2022-04-24
op
struct histitem hi;
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2022-04-24
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if ((hist = fopen(history_file, "r")) == NULL)
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op
while ((linelen = getline(&line, &linesize, hist)) != -1) {
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2022-04-24
op
if ((nl = strchr(line, '\n')) != NULL)
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*nl = '\0';
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2022-04-24
op
if ((spc = strchr(line, ' ')) == NULL)
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op
continue;
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op
*spc = '\0';
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memset(&hi, 0, sizeof(hi));
511
2022-04-24
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hi.ts = strtonum(line, INT64_MIN, INT64_MAX, &errstr);
512
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op
if (errstr != NULL)
513
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op
continue;
514
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op
if (strlcpy(hi.uri, spc, sizeof(hi.uri)) >= sizeof(hi.uri))
515
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op
continue;
517
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op
history_push(&hi);
520
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op
fclose(hist);
521
2022-04-24
op
free(line);
523
2022-04-24
op
history_sort();
527
2022-04-24
op
* Check if the last time telescope crashed. The check is done by
528
2022-04-24
op
* looking at `crashed_file': if it exists then last time we crashed.
529
2022-04-24
op
* Then, while here, touch the file too, it's removed during the
530
2022-04-24
op
* teardown.
532
2022-04-24
op
static int
533
2022-04-24
op
last_time_crashed(void)
535
2022-04-24
op
int fd, crashed = 1;
537
2022-04-24
op
if (safe_mode)
538
2022-04-24
op
return 0;
540
2022-04-24
op
if (unlink(crashed_file) == -1 && errno == ENOENT)
541
2022-04-24
op
crashed = 0;
543
2022-04-24
op
if ((fd = open(crashed_file, O_CREAT|O_WRONLY, 0600)) == -1)
544
2022-04-24
op
return crashed;
545
2022-04-24
op
close(fd);
547
2022-04-24
op
return crashed;
551
2022-04-24
op
* Parse and restore a tab from the session file. The format is:
553
2022-04-24
op
* URL [flags,...] [title]\n
555
2022-04-24
op
static inline struct tab *
556
2022-04-24
op
parse_tab_line(char *line, struct tab **ct)
558
2022-04-24
op
struct tab *tab;
559
2022-04-24
op
char *s, *t, *ap;
560
2022-04-24
op
const char *uri, *title = "";
561
2022-04-24
op
int current = 0, killed = 0;
562
2022-04-24
op
size_t tline = 0, cline = 0;
564
2022-04-24
op
uri = line;
565
2022-04-24
op
if ((s = strchr(line, ' ')) == NULL)
566
2022-04-24
op
return NULL;
567
2022-04-24
op
*s++ = '\0';
569
2022-04-24
op
if ((t = strchr(s, ' ')) != NULL) {
570
2022-04-24
op
*t++ = '\0';
571
2022-04-24
op
title = t;
574
2022-04-24
op
while ((ap = strsep(&s, ",")) != NULL) {
575
2022-04-24
op
if (!strcmp(ap, "current"))
576
2022-04-24
op
current = 1;
577
2022-04-24
op
else if (!strcmp(ap, "killed"))
578
2022-04-24
op
killed = 1;
579
2022-04-24
op
else if (!strncmp(ap, "top=", 4))
580
2022-04-24
op
tline = strtonum(ap+4, 0, UINT32_MAX, NULL);
581
2022-04-24
op
else if (!strncmp(ap, "cur=", 4))
582
2022-04-24
op
cline = strtonum(ap + 4, 0, UINT32_MAX, NULL);
585
2022-04-24
op
if (tline > cline) {
586
2022-04-24
op
tline = 0;
587
2022-04-24
op
cline = 0;
590
2022-04-24
op
if ((tab = new_tab(uri, NULL, NULL)) == NULL)
591
2022-04-24
op
err(1, "new_tab");
592
2022-04-24
op
tab->hist_cur->line_off = tline;
593
2022-04-24
op
tab->hist_cur->current_off = cline;
594
2022-04-24
op
strlcpy(tab->buffer.page.title, title, sizeof(tab->buffer.page.title));
596
2022-04-24
op
if (current)
597
2022-04-24
op
*ct = tab;
598
2022-04-24
op
else if (killed)
599
2022-04-24
op
kill_tab(tab, 1);
601
2022-04-24
op
return tab;
604
2022-04-24
op
static void
605
2022-04-24
op
load_tabs(void)
607
2022-04-24
op
struct tab *tab = NULL, *ct = NULL;
608
2022-04-24
op
struct hist *h;
609
2022-04-24
op
FILE *session;
610
2022-04-24
op
size_t lineno = 0, linesize = 0;
611
2022-04-24
op
ssize_t linelen;
612
2022-04-24
op
char *uri, *line = NULL;
614
2022-04-24
op
if ((session = fopen(session_file, "r")) == NULL) {
615
2022-04-24
op
new_tab("about:new", NULL, NULL);
616
2022-04-24
op
new_tab("about:help", NULL, NULL);
620
2022-04-24
op
while ((linelen = getline(&line, &linesize, session)) != -1) {
621
2022-04-24
op
lineno++;
623
2022-04-24
op
if (linelen > 0 && line[linelen-1] == '\n')
624
2022-04-24
op
line[linelen-1] = '\0';
626
2022-04-24
op
if (*line == '<' || *line == '>') {
627
2022-04-24
op
uri = line + 1;
628
2022-04-24
op
if (*uri != ' ' || tab == NULL) {
629
2022-04-24
op
fprintf(stderr, "%s:%zu invalid line\n",
630
2022-04-24
op
session_file, lineno);
631
2022-04-24
op
continue;
635
2022-04-24
op
if ((h = calloc(1, sizeof(*h))) == NULL)
636
2022-04-24
op
err(1, "calloc");
637
2022-04-24
op
strlcpy(h->h, uri, sizeof(h->h));
639
2022-04-24
op
if (*line == '>') /* future hist */
640
2022-04-24
op
hist_push(&tab->hist, h);
642
2022-04-24
op
hist_add_before(&tab->hist, tab->hist_cur, h);
644
2022-04-24
op
tab = parse_tab_line(line, &ct);
647
2022-04-24
op
fclose(session);
648
2022-04-24
op
free(line);
650
2022-04-24
op
if (ct == NULL || TAILQ_EMPTY(&tabshead))
651
2022-04-24
op
ct = new_tab("about:new", NULL, NULL);
653
2022-04-24
op
switch_to_tab(ct);
655
2022-04-24
op
if (last_time_crashed())
656
2022-04-24
op
new_tab("about:crash", NULL, NULL);
660
2022-04-24
op
load_session(struct ohash *certs)
662
2022-04-24
op
load_certs(certs);
663
2022-04-24
op
load_hist();
664
2022-04-24
op
load_tabs();
665
2022-04-24
op
return 0;
669
2022-04-24
op
lock_session(void)
671
2022-04-24
op
struct flock lock;
674
2022-04-24
op
if ((fd = open(lockfile_path, O_WRONLY|O_CREAT, 0600)) == -1)
675
2022-04-24
op
return -1;
677
2022-04-24
op
lock.l_start = 0;
678
2022-04-24
op
lock.l_len = 0;
679
2022-04-24
op
lock.l_type = F_WRLCK;
680
2022-04-24
op
lock.l_whence = SEEK_SET;
682
2022-04-24
op
if (fcntl(fd, F_SETLK, &lock) == -1) {
683
2022-04-24
op
close(fd);
684
2022-04-24
op
return -1;
687
2022-04-24
op
return fd;
