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telescope.c
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/*
* Copyright (c) 2021, 2024 Omar Polo <[email protected]>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include "compat.h"
#include <sys/socket.h>
#include <sys/time.h>
#include <sys/un.h>
#include <sys/wait.h>
#include <errno.h>
#include <fcntl.h>
#include <getopt.h>
#include <limits.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "certs.h"
#include "cmd.h"
#include "control.h"
#include "defaults.h"
#include "ev.h"
#include "exec.h"
#include "fs.h"
#include "hist.h"
#include "imsgev.h"
#include "iri.h"
#include "keymap.h"
#include "mailcap.h"
#include "mcache.h"
#include "minibuffer.h"
#include "parser.h"
#include "parser.h"
#include "session.h"
#include "telescope.h"
#include "tofu.h"
#include "ui.h"
#include "utils.h"
#include "xwrapper.h"
static const struct option longopts[] = {
{"help", no_argument, NULL, 'h'},
{"safe", no_argument, NULL, 'S'},
{"version", no_argument, NULL, 'v'},
{NULL, 0, NULL, 0},
};
static const char *opts = "c:hnST:v";
static int has_url;
static char url[GEMINI_URL_LEN];
/*
* Used to know when we're finished loading.
*/
int operating;
/*
* "Safe" (or "sandobox") mode. If enabled, Telescope shouldn't write
* anything to the filesystem or execute external programs.
*/
int safe_mode;
static struct imsgev *iev_net;
struct tabshead tabshead = TAILQ_HEAD_INITIALIZER(tabshead);
struct tabshead ktabshead = TAILQ_HEAD_INITIALIZER(ktabshead);
struct proxylist proxies = TAILQ_HEAD_INITIALIZER(proxies);
enum telescope_process {
PROC_UI,
PROC_NET,
};
#define CANNOT_FETCH 0
#define TOO_MANY_REDIRECTS 1
#define MALFORMED_RESPONSE 2
#define UNKNOWN_TYPE_OR_CSET 3
#define UNKNOWN_PROTOCOL 4
/* XXX: keep in sync with normalize_code */
const char *err_pages[70] = {
[CANNOT_FETCH] = "# Couldn't load the page\n",
[TOO_MANY_REDIRECTS] = "# Too many redirects\n",
[MALFORMED_RESPONSE] = "# Got a malformed response\n",
[UNKNOWN_TYPE_OR_CSET] = "# Unsupported document format or charset\n",
[UNKNOWN_PROTOCOL] = "# Unknown protocol\n",
[10] = "# Input required\n",
[11] = "# Input required\n",
[40] = "# Temporary failure\n",
[41] = "# Server unavailable\n",
[42] = "# CGI error\n",
[43] = "# Proxy error\n",
[44] = "# Slow down\n",
[50] = "# Permanent failure\n",
[51] = "# Not found\n",
[52] = "# Gone\n",
[53] = "# Proxy request refused\n",
[59] = "# Bad request\n",
[60] = "# Client certificate required\n",
[61] = "# Certificate not authorised\n",
[62] = "# Certificate not valid\n"
};
static void die(void) __attribute__((__noreturn__));
static struct tab *tab_by_id(uint32_t);
static void handle_imsg_check_cert(struct imsg *);
static void handle_check_cert_user_choice(int, void *);
static void handle_maybe_save_new_cert(int, void *);
static void handle_maybe_save_page(int, void *);
static void handle_save_page_path(const char *, struct tab *);
static void handle_dispatch_imsg(int, int, void *);
static void load_about_url(struct tab *, const char *);
static void load_file_url(struct tab *, const char *);
static void load_finger_url(struct tab *, const char *);
static void load_gemini_url(struct tab *, const char *);
static void load_gopher_url(struct tab *, const char *);
static void load_via_proxy(struct tab *, const char *,
struct proxy *);
static void make_request(struct tab *, struct get_req *, int,
const char *);
static void do_load_url(struct tab *, const char *, const char *, int);
static pid_t start_child(enum telescope_process, const char *, int);
static void send_url(const char *);
static const struct proto {
const char *schema;
const char *port;
void (*loadfn)(struct tab *, const char *);
} protos[] = {
{"about", NULL, load_about_url},
{"file", NULL, load_file_url},
{"finger", "79", load_finger_url},
{"gemini", "1965", load_gemini_url},
{"gopher", "70", load_gopher_url},
{NULL, NULL, NULL},
};
static struct ohash certs;
static void __attribute__((__noreturn__))
die(void)
{
abort(); /* TODO */
}
static struct tab *
tab_by_id(uint32_t id)
{
struct tab *t;
TAILQ_FOREACH(t, &tabshead, tabs) {
if (t->id == id)
return t;
}
return NULL;
}
static void
handle_imsg_check_cert(struct imsg *imsg)
{
char *hash;
const char *host, *port;
int tofu_res;
struct ibuf ibuf;
struct tofu_entry *e;
struct tab *tab;
size_t datalen;
if (imsg_get_ibuf(imsg, &ibuf) == -1 ||
ibuf_borrow_str(&ibuf, &hash) == -1)
abort();
datalen = strlen(hash);
if ((tab = tab_by_id(imsg_get_id(imsg))) == NULL)
return;
if (tab->proxy != NULL) {
host = tab->proxy->host;
port = tab->proxy->port;
} else {
host = tab->iri.iri_host;
port = tab->iri.iri_portstr;
}
if ((e = tofu_lookup(&certs, host, port)) == NULL) {
/* TODO: an update in libressl/libretls changed
* significantly. Find a better approach at storing
* the certs! */
if (datalen > sizeof(e->hash))
abort();
tofu_res = 1; /* trust on first use */
e = xcalloc(1, sizeof(*e));
strlcpy(e->domain, host, sizeof(e->domain));
if (*port != '\0' && strcmp(port, "1965")) {
strlcat(e->domain, ":", sizeof(e->domain));
strlcat(e->domain, port, sizeof(e->domain));
}
strlcpy(e->hash, hash, sizeof(e->hash));
tofu_save(&certs, e);
} else
tofu_res = !strcmp(hash, e->hash);
if (tofu_res) {
if (e->verified == -1)
tab->trust = TS_TEMP_TRUSTED;
else if (e->verified == 1)
tab->trust = TS_VERIFIED;
else
tab->trust = TS_TRUSTED;
ui_send_net(IMSG_CERT_STATUS, imsg->hdr.peerid, -1,
&tofu_res, sizeof(tofu_res));
} else {
tab->trust = TS_UNTRUSTED;
load_page_from_str(tab, "# Certificate mismatch\n");
tab->cert = xstrdup(hash);
ui_yornp("Certificate mismatch. Proceed?",
handle_check_cert_user_choice, tab);
}
}
static void
handle_check_cert_user_choice(int accept, void *d)
{
struct tab *tab = d;
ui_send_net(IMSG_CERT_STATUS, tab->id, -1, &accept,
sizeof(accept));
if (accept) {
const char *host, *port;
host = tab->iri.iri_host;
port = tab->iri.iri_portstr;
/*
* trust the certificate for this session only. If
* the page results in a redirect while we're asking
* the user to save, we'll end up with an invalid
* tabid (one request == one tab id). It also makes
* sense to save it for the current session if the
* user accepted it.
*/
tofu_temp_trust(&certs, host, port, tab->cert);
if (!safe_mode)
ui_yornp("Save the new certificate?",
handle_maybe_save_new_cert, tab);
else
message("Certificate temporarly trusted");
} else {
free(tab->cert);
tab->cert = NULL;
}
}
static void
handle_maybe_save_new_cert(int accept, void *data)
{
struct tab *tab = data;
struct tofu_entry *e;
const char *host, *port;
if (tab->proxy != NULL) {
host = tab->proxy->host;
port = tab->proxy->port;
} else {
host = tab->iri.iri_host;
port = tab->iri.iri_portstr;
}
if (!accept)
goto end;
e = xcalloc(1, sizeof(*e));
strlcpy(e->domain, host, sizeof(e->domain));
if (*port != '\0' && strcmp(port, "1965")) {
strlcat(e->domain, ":", sizeof(e->domain));
strlcat(e->domain, port, sizeof(e->domain));
}
strlcpy(e->hash, tab->cert, sizeof(e->hash));
tofu_update_persist(&certs, e);
tab->trust = TS_TRUSTED;
end:
free(tab->cert);
tab->cert = NULL;
}
static inline int
normalize_code(int n)
{
if (n < 20) {
if (n == 10 || n == 11)
return n;
return 10;
} else if (n < 30) {
return 20;
} else if (n < 40) {
if (n == 30 || n == 31)
return n;
return 30;
} else if (n < 50) {
if (n <= 44)
return n;
return 40;
} else if (n < 60) {
if (n <= 53 || n == 59)
return n;
return 50;
} else if (n < 70) {
if (n <= 62)
return n;
return 60;
} else
return MALFORMED_RESPONSE;
}
static void
handle_request_response(struct tab *tab)
{
char buf[128];
if (tab->code != 30 && tab->code != 31)
tab->redirect_count = 0;
if (tab->code < 10) { /* internal errors */
load_page_from_str(tab, err_pages[tab->code]);
} else if (tab->code < 20) { /* 1x */
free(tab->last_input_url);
tab->last_input_url = xstrdup(hist_cur(tab->hist));
load_page_from_str(tab, err_pages[tab->code]);
ui_require_input(tab, tab->code == 11, ir_select_gemini);
} else if (tab->code == 20) {
history_add(hist_cur(tab->hist));
if (setup_parser_for(tab)) {
ui_send_net(IMSG_PROCEED, tab->id, -1, NULL, 0);
} else if (safe_mode) {
load_page_from_str(tab,
err_pages[UNKNOWN_TYPE_OR_CSET]);
} else {
hist_prev(tab->hist);
snprintf(buf, sizeof(buf),
"Can't display \"%s\", save it?", tab->meta);
ui_yornp(buf, handle_maybe_save_page, tab);
}
} else if (tab->code < 40) { /* 3x */
tab->redirect_count++;
/* TODO: make customizable? */
if (tab->redirect_count > 5) {
load_page_from_str(tab,
err_pages[TOO_MANY_REDIRECTS]);
} else
do_load_url(tab, tab->meta, hist_cur(tab->hist),
LU_MODE_NOCACHE);
} else { /* 4x, 5x & 6x */
load_page_from_str(tab, err_pages[tab->code]);
if (tab->code >= 60) {
cmd_use_certificate(&tab->buffer);
ui_force_tab_refresh(tab);
}
}
}
static void
handle_maybe_save_page(int dosave, void *data)
{
struct tab *tab = data;
const char *f;
char input[PATH_MAX];
/* XXX: this print a message that is confusing */
ui_on_tab_loaded(tab);
if (!dosave) {
stop_tab(tab);
return;
}
if ((f = strrchr(tab->iri.iri_path, '/')) == NULL)
f = "";
else
f++;
strlcpy(input, download_path, sizeof(input));
strlcat(input, f, sizeof(input));
ui_read("Save to path", handle_save_page_path, tab, input);
}
static void
handle_save_page_path(const char *path, struct tab *tab)
{
struct download *d;
int fd;
if (path == NULL) {
stop_tab(tab);
return;
}
if ((fd = open(path, O_WRONLY|O_TRUNC|O_CREAT, 0644)) == -1) {
message("Can't open file %s: %s", path, strerror(errno));
stop_tab(tab);
return;
}
ui_show_downloads_pane();
d = enqueue_download(tab->id, path, tab->meta);
d->fd = fd;
ui_send_net(IMSG_PROCEED, d->id, -1, NULL, 0);
/*
* Change this tab id, the old one is associated with the
* download now.
*/
tab->id = tab_new_id();
}
static void
handle_dispatch_imsg(int fd, int event, void *data)
{
struct imsgev *iev = data;
struct imsgbuf *imsgbuf = &iev->ibuf;
struct imsg imsg;
struct ibuf ibuf;
struct tab *tab;
struct download *d;
const char *h;
char *str, *page;
ssize_t n;
int code;
if (event & EV_READ) {
if (imsgbuf_read(imsgbuf) == -1)
err(1, "imsg_read");
}
if (event & EV_WRITE) {
if (imsgbuf_write(imsgbuf) == -1)
err(1, "msgbuf_write");
}
for (;;) {
if ((n = imsg_get(imsgbuf, &imsg)) == -1)
err(1, "imsg_get");
if (n == 0)
break;
switch (imsg_get_type(&imsg)) {
case IMSG_ERR:
if ((tab = tab_by_id(imsg_get_id(&imsg))) == NULL)
break;
if (imsg_get_ibuf(&imsg, &ibuf) == -1 ||
ibuf_borrow_str(&ibuf, &str) == -1)
die();
xasprintf(&page, "# Error loading %s\n\n> %s\n",
hist_cur(tab->hist), str);
load_page_from_str(tab, page);
free(page);
break;
case IMSG_CHECK_CERT:
handle_imsg_check_cert(&imsg);
break;
case IMSG_REPLY:
if ((tab = tab_by_id(imsg_get_id(&imsg))) == NULL)
break;
if (imsg_get_ibuf(&imsg, &ibuf) == -1 ||
ibuf_get(&ibuf, &code, sizeof(code)) == -1 ||
ibuf_borrow_str(&ibuf, &str) == -1)
die();
if (strlcpy(tab->meta, str, sizeof(tab->meta)) >=
sizeof(tab->meta))
die();
tab->code = normalize_code(code);
handle_request_response(tab);
break;
case IMSG_BUF:
if ((tab = tab_by_id(imsg_get_id(&imsg))) == NULL &&
((d = download_by_id(imsg_get_id(&imsg)))) == NULL)
return;
if (tab) {
if (!parser_parse(&tab->buffer, imsg.data,
imsg_get_len(&imsg)))
die();
ui_on_tab_refresh(tab);
} else {
size_t datalen = imsg_get_len(&imsg);
d->bytes += datalen;
write(d->fd, imsg.data, datalen);
ui_on_download_refresh();
}
break;
case IMSG_FAULTY_GEMSERVER:
if ((tab = tab_by_id(imsg_get_id(&imsg))) == NULL &&
((d = download_by_id(imsg_get_id(&imsg)))) == NULL)
return;
if (tab) {
tab->faulty_gemserver = 1;
ui_on_tab_refresh(tab);
} else {
message("Download interrupted!");
}
break;
case IMSG_EOF:
if ((tab = tab_by_id(imsg_get_id(&imsg))) == NULL &&
((d = download_by_id(imsg_get_id(&imsg)))) == NULL)
return;
if (tab == NULL && d != NULL) {
download_finished(d);
return;
}
if (tab != NULL) {
if (!parser_free(tab))
die();
h = hist_cur(tab->hist);
if (!strncmp(h, "gemini://", 9) ||
!strncmp(h, "gopher://", 9) ||
!strncmp(h, "finger://", 9))
mcache_tab(tab);
/*
* Gemini is handled as soon as a 2x
* reply is got.
*/
if (!strncmp(h, "finger://", 9) ||
!strncmp(h, "gopher://", 9))
history_add(h);
ui_on_tab_refresh(tab);
ui_on_tab_loaded(tab);
}
break;
default:
errx(1, "got unknown imsg %d", imsg_get_type(&imsg));
}
imsg_free(&imsg);
}
imsg_event_add(iev);
}
static void
load_about_url(struct tab *tab, const char *url)
{
tab->trust = TS_TRUSTED;
fs_load_url(tab, url);
ui_on_tab_refresh(tab);
ui_on_tab_loaded(tab);
}
static void
load_file_url(struct tab *tab, const char *url)
{
tab->trust = TS_TRUSTED;
fs_load_url(tab, url);
ui_on_tab_refresh(tab);
ui_on_tab_loaded(tab);
}
static void
load_finger_url(struct tab *tab, const char *url)
{
struct get_req req;
const char *path;
memset(&req, 0, sizeof(req));
strlcpy(req.host, tab->iri.iri_host, sizeof(req.host));
strlcpy(req.port, tab->iri.iri_portstr, sizeof(req.port));
/*
* Sometimes the finger url have the user as path component
* (e.g. finger://thelambdalab.xyz/plugd), sometimes as
* userinfo (e.g. finger://[email protected]).
*/
if (tab->iri.iri_flags & IH_UINFO) {
strlcpy(req.req, tab->iri.iri_uinfo, sizeof(req.req));
} else {
path = tab->iri.iri_path;
while (*path == '/')
++path;
strlcpy(req.req, path, sizeof(req.req));
}
strlcat(req.req, "\r\n", sizeof(req.req));
parser_init(&tab->buffer, &textplain_parser);
make_request(tab, &req, PROTO_FINGER, NULL);
}
static void
load_gemini_url(struct tab *tab, const char *url)
{
struct get_req req;
memset(&req, 0, sizeof(req));
strlcpy(req.host, tab->iri.iri_host, sizeof(req.host));
strlcpy(req.port, tab->iri.iri_portstr, sizeof(req.port));
make_request(tab, &req, PROTO_GEMINI, hist_cur(tab->hist));
}
static inline const char *
gopher_skip_selector(const char *path, int *ret_type)
{
*ret_type = 0;
if (!strcmp(path, "/") || *path == '\0') {
*ret_type = '1';
return path;
}
if (*path != '/')
return path;
path++;
switch (*ret_type = *path) {
case '0':
case '1':
case '7':
break;
default:
*ret_type = 0;
path -= 1;
return path;
}
return ++path;
}
static void
load_gopher_url(struct tab *tab, const char *url)
{
struct get_req req;
int type;
const char *path;
memset(&req, 0, sizeof(req));
strlcpy(req.host, tab->iri.iri_host, sizeof(req.host));
strlcpy(req.port, tab->iri.iri_portstr, sizeof(req.port));
path = gopher_skip_selector(tab->iri.iri_path, &type);
switch (type) {
case '0':
parser_init(&tab->buffer, &textplain_parser);
break;
case '1':
parser_init(&tab->buffer, &gophermap_parser);
break;
case '7':
free(tab->last_input_url);
tab->last_input_url = xstrdup(url);
ui_require_input(tab, 0, ir_select_gopher);
load_page_from_str(tab, err_pages[10]);
return;
default:
load_page_from_str(tab, "Unknown gopher selector");
return;
}
if (iri_urlunescape(path, req.req, sizeof(req.req)) == -1)
strlcpy(req.req, path, sizeof(req.req));
if (tab->iri.iri_flags & IH_QUERY) {
strlcat(req.req, "?", sizeof(req.req));
strlcat(req.req, tab->iri.iri_query, sizeof(req.req));
}
strlcat(req.req, "\r\n", sizeof(req.req));
make_request(tab, &req, PROTO_GOPHER, NULL);
}
static void
load_via_proxy(struct tab *tab, const char *url, struct proxy *p)
{
struct get_req req;
memset(&req, 0, sizeof(req));
strlcpy(req.host, p->host, sizeof(req.host));
strlcpy(req.port, p->port, sizeof(req.port));
tab->proxy = p;
make_request(tab, &req, p->proto, hist_cur(tab->hist));
}
static void
make_request(struct tab *tab, struct get_req *req, int proto, const char *r)
{
int use_cert = 0, fd = -1;
if (proto == PROTO_GEMINI) {
tab->client_cert = cert_for(&tab->iri, &tab->client_cert_temp);
use_cert = (tab->client_cert != NULL);
}
stop_tab(tab);
tab->id = tab_new_id();
tab->faulty_gemserver = 0;
req->proto = proto;
if (r != NULL) {
strlcpy(req->req, r, sizeof(req->req));
strlcat(req->req, "\r\n", sizeof(req->req));
}
start_loading_anim(tab);
if (!use_cert)
tab->client_cert = NULL;
if (use_cert && (fd = cert_open(tab->client_cert)) == -1) {
tab->client_cert = NULL;
message("failed to open certificate: %s", strerror(errno));
}
ui_send_net(IMSG_GET, tab->id, fd, req, sizeof(*req));
}
void
gopher_send_search_req(struct tab *tab, const char *text)
{
struct get_req req;
memset(&req, 0, sizeof(req));
strlcpy(req.host, tab->iri.iri_host, sizeof(req.host));
strlcpy(req.port, tab->iri.iri_portstr, sizeof(req.port));
/* +2 to skip /7 */
strlcpy(req.req, tab->iri.iri_path+2, sizeof(req.req));
if (tab->iri.iri_flags & IH_QUERY) {
strlcat(req.req, "?", sizeof(req.req));
strlcat(req.req, tab->iri.iri_query, sizeof(req.req));
}
strlcat(req.req, "\t", sizeof(req.req));
strlcat(req.req, text, sizeof(req.req));
strlcat(req.req, "\r\n", sizeof(req.req));
erase_buffer(&tab->buffer);
parser_init(&tab->buffer, &gophermap_parser);
make_request(tab, &req, PROTO_GOPHER, NULL);
}
void
load_page_from_str(struct tab *tab, const char *page)
{
parser_init(&tab->buffer, &gemtext_parser);
if (!parser_parse(&tab->buffer, page, strlen(page)))
abort();
if (!parser_free(tab))
abort();
ui_on_tab_refresh(tab);
ui_on_tab_loaded(tab);
}
static void
do_load_url_cmd(int res, void *d)
{
struct tab *tab = d;
const char *argv[3];
if (!res)
return;
argv[0] = DEFAULT_OPENER;
argv[1] = hist_cur(tab->hist);
argv[2] = NULL;
exec_cmd((char **)argv, EXEC_BACKGROUND);
message("Link opened with %s", DEFAULT_OPENER);
}
/*
* Effectively load the given url in the given tab.
*/
static void
do_load_url(struct tab *tab, const char *url, const char *base, int mode)
{
const struct proto *p;
struct proxy *proxy;
int nocache = mode & LU_MODE_NOCACHE;
char *t;
char buf[1025];
tab->proxy = NULL;
tab->trust = TS_UNKNOWN;
if (iri_parse(base, url, &tab->iri) == -1) {
xasprintf(&t, "# error loading %s\n>%s\n", url,
"Can't parse the IRI");
hist_set_cur(tab->hist, url);
load_page_from_str(tab, t);
free(t);
return;
}
iri_unparse(&tab->iri, buf, sizeof(buf));
hist_set_cur(tab->hist, buf);
if (!nocache && mcache_lookup(buf, tab)) {
ui_on_tab_refresh(tab);
ui_on_tab_loaded(tab);
return;
}
for (p = protos; p->schema != NULL; ++p) {
if (!strcmp(tab->iri.iri_scheme, p->schema)) {
/* patch the port */
if (*tab->iri.iri_portstr == '\0' &&
p->port != NULL)
iri_setport(&tab->iri, p->port);
p->loadfn(tab, buf);
return;
}
}
TAILQ_FOREACH(proxy, &proxies, proxies) {
if (!strcmp(tab->iri.iri_scheme, proxy->match_proto)) {
load_via_proxy(tab, url, proxy);
return;
}
}
load_page_from_str(tab, err_pages[UNKNOWN_PROTOCOL]);
ui_yornp("Open page with "DEFAULT_OPENER"?",
do_load_url_cmd, tab);
}
/*
* Load url in tab and handle history. If a tab is marked as lazy, only
* prepare the url but don't load it.
*/
void
load_url(struct tab *tab, const char *url, const char *base, int mode)
{
size_t line_off, curr_off;
int lazy = tab->flags & TAB_LAZY;
int dohist = !(mode & LU_MODE_NOHIST);
if (operating && lazy) {
tab->flags ^= TAB_LAZY;
lazy = 0;
} else if (hist_size(tab->hist) != 0) {
get_scroll_position(tab, &line_off, &curr_off);
hist_set_offs(tab->hist, line_off, curr_off);
}
if (dohist) {
if (hist_push(tab->hist, url) == -1) {
ev_break();
return;
}
strlcpy(tab->buffer.title, url, sizeof(tab->buffer.title));
}
if (!lazy)
do_load_url(tab, url, base, mode);
}
void
load_url_in_tab(struct tab *tab, const char *url, const char *base, int mode)
{
if (operating) {
autosave_hook();
message("Loading %s...", url);
}
if (base == NULL)
base = hist_cur(tab->hist);
load_url(tab, url, base, mode);
}
int
load_previous_page(struct tab *tab)
{
const char *h;
if ((h = hist_prev(tab->hist)) == NULL)
return 0;
do_load_url(tab, h, NULL, LU_MODE_NONE);
return 1;
}
int
load_next_page(struct tab *tab)
{
const char *h;
if ((h = hist_next(tab->hist)) == NULL)
return 0;
do_load_url(tab, h, NULL, LU_MODE_NONE);
return 1;
}
void
write_buffer(const char *path, struct tab *tab)
{
FILE *fp;
if (path == NULL)
return;
if ((fp = fopen(path, "w")) == NULL)
return;
if (!parser_serialize(&tab->buffer, fp))
message("Failed to save the page.");
fclose(fp);
}
/*
* Given a user-entered URL, apply some heuristics to use it if
* load-url-use-heuristic allows it.
*
* - if it's a proper url use it
* - if it starts with a `./' or a `/' assume its a file:// url
* - assume it's a default-protocol:// url
*
* `ret' (of which len is the size) will be filled with the resulting
* url.
*/
void
humanify_url(const char *raw, const char *base, char *ret, size_t len)
{
static struct iri iri;
if (load_url_use_heuristic)
base = NULL;
if (iri_parse(base, raw, &iri) == 0) {
iri_unparse(&iri, ret, len);
return;
}
if (!strncmp(raw, "./", 2)) {
strlcpy(ret, "file://", len);
strlcat(ret, cwd, len);
strlcat(ret, "/", len);
strlcat(ret, raw+2, len);
return;
}
if (*raw == '/') {
strlcpy(ret, "file://", len);
strlcat(ret, raw, len);
return;
}
strlcpy(ret, default_protocol, len);
strlcat(ret, "://", len);
strlcat(ret, raw, len);
}
int
bookmark_page(const char *url)
{
FILE *fp;
if ((fp = fopen(bookmark_file, "a")) == NULL)
return -1;
fprintf(fp, "=> %s\n", url);
fclose(fp);
return 0;
}
static pid_t
start_child(enum telescope_process p, const char *argv0, int fd)
{
const char *argv[5];