// fifo_init_internal(path)
// If path is NULL, reopen existing fifo, else open anew.
static int fifo_init_internal(const char *fifo_path)
{
if (fifo_path) {
fifo_deinit();
fifo_name = expand_filename(fifo_path);
if (!check_fifo(fifo_name)) {
scr_LogPrint(LPRINT_LOGNORM, "WARNING: Cannot create the FIFO. "
"%s already exists and is not a pipe", fifo_name);
g_free(fifo_name);
fifo_name = NULL;
return -1;
}
} else if (fifo_name)
g_source_remove_by_user_data(fifo_channel);
else
return -1;
if (!attach_fifo(fifo_name)) {
scr_LogPrint(LPRINT_LOGNORM, "Error: Cannot open fifo");
return -1;
}
setenv(FIFO_ENV_NAME, fifo_name, 1);
scr_LogPrint(LPRINT_LOGNORM, "FIFO initialized (%s)", fifo_path);
return 1;
}
static guint fifo_callback(GIOChannel *channel,
GIOCondition condition,
gpointer data)
{
if (condition & (G_IO_IN|G_IO_PRI)) {
GIOStatus chstat;
gchar *buf;
gsize endpos;
chstat = g_io_channel_read_line(channel, &buf, NULL, &endpos, NULL);
if (chstat == G_IO_STATUS_ERROR || chstat == G_IO_STATUS_EOF) {
if (!attach_fifo(fifo_name))
scr_LogPrint(LPRINT_LOGNORM,
"Reopening fifo failed! Fifo will not work from now!");
return FALSE;
}
if (buf) {
guint logflag;
guint fifo_ignore = settings_opt_get_int("fifo_ignore");
if (endpos)
buf[endpos] = '\0';
if (settings_opt_get_int("fifo_hide_commands"))
logflag = LPRINT_LOG;
else
logflag = LPRINT_LOGNORM;
scr_LogPrint(logflag, "%s FIFO command: %s",
(fifo_ignore ? "Ignoring" : "Executing"), buf);
if (!fifo_ignore) {
process_command(buf, TRUE);
}
g_free(buf);
}
} else if (condition & (G_IO_ERR|G_IO_NVAL|G_IO_HUP)) {
if (!attach_fifo(fifo_name))
scr_LogPrint(LPRINT_LOGNORM,
"Reopening fifo failed! Fifo will not work from now!");
return FALSE;
}
return TRUE;
}
/*@null@*/ gchar*
init_fifo(gchar *dir) { /* return dir or, on error, free dir and return NULL */
if (uzbl.comm.fifo_path) { /* get rid of the old fifo if one exists */
if (unlink(uzbl.comm.fifo_path) == -1)
g_warning ("Fifo: Can't unlink old fifo at %s\n", uzbl.comm.fifo_path);
g_free(uzbl.comm.fifo_path);
uzbl.comm.fifo_path = NULL;
}
gchar *path = build_stream_name(FIFO, dir);
if (!file_exists(path)) {
if (mkfifo (path, 0666) == 0 && attach_fifo(path)) {
return dir;
} else g_warning ("init_fifo: can't create %s: %s\n", path, strerror(errno));
} else {
/* the fifo exists. but is anybody home? */
int fd = open(path, O_WRONLY|O_NONBLOCK);
if(fd < 0) {
/* some error occurred, presumably nobody's on the read end.
* we can attach ourselves to it. */
if(attach_fifo(path))
return dir;
else
g_warning("init_fifo: can't attach to %s: %s\n", path, strerror(errno));
} else {
/* somebody's there, we can't use that fifo. */
close(fd);
/* whatever, this instance can live without a fifo. */
g_warning ("init_fifo: can't create %s: file exists and is occupied\n", path);
}
}
/* if we got this far, there was an error; cleanup */
g_free(dir);
g_free(path);
return NULL;
}