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c.sexchat
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Improve scrollback file handling 

- Properly use filesystem encoding
- Validate utf8 when loading (hopefully fixing crashes)
- Use Gio
- Handle Windows line endings
- Remove dead code
- Fix respecting max length of scrollback files
This commit is contained in:
Patrick Griffis 2016-01-31 15:13:18 -05:00
parent 089fe95a42
commit 650bddcfd1
3 changed files with 111 additions and 120 deletions
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1
src/common/hexchat.c
View File

@ -447,7 +447,6 @@ session_new (server *serv, char *from, int type, int focus)
sess->server = serv;
sess->logfd = -1;
sess->scrollfd = -1;
sess->type = type;
sess->alert_beep = SET_DEFAULT;

3
src/common/hexchat.h
View File

@ -377,7 +377,8 @@ typedef struct session
char channelkey[64]; /* XXX correct max length? */
int limit; /* channel user limit */
int logfd;
int scrollfd; /* scrollback filedes */
GFile *scrollfile; /* scrollback file */
int scrollwritten; /* number of lines written */
char lastnick[NICKLEN]; /* last nick you /msg'ed */

221
src/common/text.c
View File

@ -65,13 +65,15 @@ struct pevt_stage1
static ca_context *ca_con;
#endif
#define SCROLLBACK_MAX 32000
static void mkdir_p (char *filename);
static char *log_create_filename (char *channame);
static char *
scrollback_get_filename (session *sess)
{
char *net, *chan, *buf;
char *net, *chan, *buf, *ret = NULL;
net = server_get_network (sess->server, FALSE);
if (!net)
@ -88,54 +90,19 @@ scrollback_get_filename (session *sess)
buf = NULL;
g_free (chan);
return buf;
if (buf)
{
ret = g_filename_from_utf8 (buf, -1, NULL, NULL, NULL);
g_free (buf);
}
return ret;
}
#if 0
static void
scrollback_unlock (session *sess)
{
char buf[1024];
if (scrollback_get_filename (sess, buf, sizeof (buf) - 6) == NULL)
return;
strcat (buf, ".lock");
unlink (buf);
}
static gboolean
scrollback_lock (session *sess)
{
char buf[1024];
int fh;
if (scrollback_get_filename (sess, buf, sizeof (buf) - 6) == NULL)
return FALSE;
strcat (buf, ".lock");
if (access (buf, F_OK) == 0)
return FALSE; /* can't get lock */
fh = open (buf, O_CREAT | O_TRUNC | O_APPEND | O_WRONLY, 0644);
if (fh == -1)
return FALSE;
return TRUE;
}
#endif
void
scrollback_close (session *sess)
{
if (sess->scrollfd != -1)
{
close (sess->scrollfd);
sess->scrollfd = -1;
}
g_clear_object (&sess->scrollfile);
}
/* shrink the file to roughly prefs.hex_text_max_lines */
@ -143,29 +110,13 @@ scrollback_close (session *sess)
static void
scrollback_shrink (session *sess)
{
char *file;
char *buf;
int fh;
int lines;
int line;
char *buf, *p;
gsize len;
char *p;
gint offset, lines = 0;
const gint max_lines = MIN(prefs.hex_text_max_lines, SCROLLBACK_MAX);
scrollback_close (sess);
sess->scrollwritten = 0;
lines = 0;
if ((file = scrollback_get_filename (sess)) == NULL)
{
g_free (file);
if (!g_file_load_contents (sess->scrollfile, NULL, &buf, &len, NULL, NULL))
return;
}
if (!g_file_get_contents (file, &buf, &len, NULL))
{
g_free (file);
return;
}
/* count all lines */
p = buf;
@ -176,41 +127,37 @@ scrollback_shrink (session *sess)
p++;
}
fh = g_open (file, O_CREAT | O_TRUNC | O_APPEND | O_WRONLY | OFLAGS, 0644);
g_free (file);
if (fh == -1)
{
g_free (buf);
return;
}
offset = lines - max_lines;
line = 0;
/* now just go back to where we want to start the file */
p = buf;
lines = 0;
while (p != buf + len)
{
if (*p == '\n')
{
line++;
if (line >= lines - prefs.hex_text_max_lines &&
p + 1 != buf + len)
lines++;
if (lines == offset)
{
p++;
write (fh, p, len - (p - buf));
break;
}
}
p++;
}
close (fh);
if (g_file_replace_contents (sess->scrollfile, p, strlen(p), NULL, FALSE,
G_FILE_CREATE_PRIVATE, NULL, NULL, NULL))
sess->scrollwritten = lines;
g_free (buf);
}
static void
scrollback_save (session *sess, char *text, time_t stamp)
{
GOutputStream *ostream;
char *buf;
int len;
if (sess->type == SESS_SERVER && prefs.hex_gui_tab_server == 1)
return;
@ -226,16 +173,25 @@ scrollback_save (session *sess, char *text, time_t stamp)
return;
}
if (sess->scrollfd == -1)
if (!sess->scrollfile)
{
if ((buf = scrollback_get_filename (sess)) == NULL)
return;
sess->scrollfd = g_open (buf, O_CREAT | O_APPEND | O_WRONLY | OFLAGS, 0644);
sess->scrollfile = g_file_new_for_path (buf);
g_free (buf);
if (sess->scrollfd == -1)
return;
}
else
{
/* Users can delete the folder after it's created... */
GFile *parent = g_file_get_parent (sess->scrollfile);
g_file_make_directory_with_parents (parent, NULL, NULL);
g_object_unref (parent);
}
ostream = G_OUTPUT_STREAM(g_file_append_to (sess->scrollfile, G_FILE_CREATE_PRIVATE, NULL, NULL));
if (!ostream)
return;
if (!stamp)
stamp = time(0);
@ -243,31 +199,30 @@ scrollback_save (session *sess, char *text, time_t stamp)
buf = g_strdup_printf ("T %d ", (int) stamp);
else
buf = g_strdup_printf ("T %" G_GINT64_FORMAT " ", (gint64)stamp);
write (sess->scrollfd, buf, strlen (buf));
g_free (buf);
len = strlen (text);
write (sess->scrollfd, text, len);
if (len && text[len - 1] != '\n')
write (sess->scrollfd, "\n", 1);
g_output_stream_write (ostream, buf, strlen (buf), NULL, NULL);
g_output_stream_write (ostream, text, strlen (text), NULL, NULL);
if (!g_str_has_suffix (text, "\n"))
g_output_stream_write (ostream, "\n", 1, NULL, NULL);
g_free (buf);
g_object_unref (ostream);
sess->scrollwritten++;
if ((sess->scrollwritten * 2 > prefs.hex_text_max_lines && prefs.hex_text_max_lines > 0) ||
sess->scrollwritten > 32000)
if ((sess->scrollwritten > prefs.hex_text_max_lines && prefs.hex_text_max_lines > 0) ||
sess->scrollwritten > SCROLLBACK_MAX)
scrollback_shrink (sess);
}
void
scrollback_load (session *sess)
{
char *buf;
char *text;
GInputStream *stream;
GDataInputStream *istream;
gchar *buf, *text;
gint lines = 0;
time_t stamp;
int lines;
GIOChannel *io;
GError *file_error = NULL;
GError *io_err = NULL;
if (sess->text_scrollback == SET_DEFAULT)
{
@ -280,32 +235,37 @@ scrollback_load (session *sess)
return;
}
if (!sess->scrollfile)
{
if ((buf = scrollback_get_filename (sess)) == NULL)
return;
io = g_io_channel_new_file (buf, "r", &file_error);
sess->scrollfile = g_file_new_for_path (buf);
g_free (buf);
if (!io)
}
stream = G_INPUT_STREAM(g_file_read (sess->scrollfile, NULL, NULL));
if (!stream)
return;
lines = 0;
istream = g_data_input_stream_new (stream);
/*
* This is to avoid any issues moving between windows/unix
* but the docs mention an invalid \r without a following \n
* can lock up the program... (Our write() always adds \n)
*/
g_data_input_stream_set_newline_type (istream, G_DATA_STREAM_NEWLINE_TYPE_ANY);
g_object_unref (stream);
while (1)
{
GError *err = NULL;
gsize n_bytes;
GIOStatus io_status;
io_status = g_io_channel_read_line (io, &buf, &n_bytes, NULL, &io_err);
buf = g_data_input_stream_read_line_utf8 (istream, &n_bytes, NULL, &err);
if (io_status == G_IO_STATUS_NORMAL)
if (!err && buf)
{
char *buf_tmp;
n_bytes--;
buf_tmp = buf;
buf = g_strndup (buf_tmp, n_bytes);
g_free (buf_tmp);
/*
* Some scrollback lines have three blanks after the timestamp and a newline
* Some have only one blank and a newline
@ -349,12 +309,27 @@ scrollback_load (session *sess)
g_free (buf);
}
else
break;
else if (err)
{
/* If its only an encoding error it may be specific to the line */
if (g_error_matches (err, G_CONVERT_ERROR, G_CONVERT_ERROR_ILLEGAL_SEQUENCE))
{
g_warning ("Invalid utf8 in scrollback file\n");
g_clear_error (&err);
continue;
}
g_io_channel_unref (io);
/* For general errors just give up */
g_clear_error (&err);
break;
}
else /* No new line */
{
break;
}
}
g_object_unref (istream);
sess->scrollwritten = lines;
@ -386,14 +361,30 @@ log_close (session *sess)
}
}
/*
* filename should be in utf8 encoding and will be
* converted to filesystem encoding automatically.
*/
static void
mkdir_p (char *filename)
{
char *dirname = g_path_get_dirname (filename);
char *dirname, *dirname_fs;
GError *err = NULL;
g_mkdir_with_parents (dirname, 0700);
dirname = g_path_get_dirname (filename);
dirname_fs = g_filename_from_utf8 (dirname, -1, NULL, NULL, &err);
if (!dirname_fs)
{
g_warning ("%s", err->message);
g_error_free (err);
g_free (dirname);
return;
}
g_mkdir_with_parents (dirname_fs, 0700);
g_free (dirname);
g_free (dirname_fs);
}
static char *