Fix a Gtk warning when checking path input in the log viewer.

[anjuta-git-plugin.git] / libanjuta / anjuta-launcher.c

/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 4; tab-width: 4 -*- */
/*
 * anjuta-launcher.c
 * Copyright (C) 2003 Naba Kumar  <naba@gnome.org>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the Free
 * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

/**
 * SECTION:anjuta-launcher
 * @short_description: External process launcher with async input/output
 * @see_also: 
 * @stability: Unstable
 * @include: libanjuta/anjuta-launcher.h
 * 
 */

#ifdef HAVE_CONFIG_H
#  include <config.h>
#endif

#include <errno.h>
#include <unistd.h>
#include <fcntl.h>
#include <signal.h>

#if defined(__FreeBSD__)
#  include <libutil.h>
#elif defined(__OpenBSD__) || defined(__NetBSD__)
#  include <util.h>
#elif !defined(__sun)
#  include <pty.h>
#endif

#include "anjuta-utils-priv.h"

#include <assert.h>
#include <termios.h>

#include <string.h>
#include <time.h>
#include <glib/gi18n.h>
#include <glib.h>

#include "anjuta-utils.h"
#include "anjuta-marshal.h"
#include "resources.h"
#include "anjuta-launcher.h"
#include "anjuta-debug.h"

#define ANJUTA_PIXMAP_PASSWORD "password.png"
#define FILE_BUFFER_SIZE 1024
#define FILE_INPUT_BUFFER_SIZE          1048576
#ifndef __MAX_BAUD
#  if defined(B460800)
#    define __MAX_BAUD B460800
#  elif defined(B307200)
#    define __MAX_BAUD B307200
#  elif defined(B256000)
#    define __MAX_BAUD B256000
#  else
#    define __MAX_BAUD B230400
#  endif
#endif

/*
static gboolean
anjuta_launcher_pty_check_child_exit_code (AnjutaLauncher *launcher,
                                                                                   const gchar* line);
*/
struct _AnjutaLauncherPriv
{
        /*
        *  Busy flag is TRUE if the Launcher
        *  is currently executing a child.
        */
        gboolean busy;
        
        /* These flags are used to synchronize the IO operations. */
        gboolean stdout_is_done;
        gboolean stderr_is_done;
        
        /* GIO channels */
        GIOChannel *stdout_channel;
        GIOChannel *stderr_channel;
        /*GIOChannel *stdin_channel;*/
        GIOChannel *pty_channel;

        /* GIO watch handles */
        guint stdout_watch;
        guint stderr_watch;
        guint pty_watch;
        
        /* Output line buffers */
        gchar *stdout_buffer;
        gchar *stderr_buffer;
        
        /* Output of the pty is constantly stored here.*/
        gchar *pty_output_buffer;

        /* Terminal echo */
        gboolean terminal_echo_on;
        
        /* The child */
        pid_t child_pid;
        guint source;
        gint child_status;
        gboolean child_has_terminated;
        
        /* Synchronization in progress */
        gboolean in_cleanup;
        guint completion_check_timeout;

        /* Terminate child on child exit */
        gboolean terminate_on_exit;

        /* Start time of execution */
        time_t start_time;
        
        /* Should the outputs be buffered */
        gboolean buffered_output;
        
        /* Should we check for password prompts in stdout and pty */
        gboolean check_for_passwd_prompt;
        
        /* Output callback */
        AnjutaLauncherOutputCallback output_callback;
        
        /* Callback data */
        gpointer callback_data;
        
        /* Encondig */
        gboolean custom_encoding;
        gchar* encoding;
        
        /* Env */
        GHashTable* env;
};

enum
{
        /* OUTPUT_ARRIVED_SIGNAL, */
        CHILD_EXITED_SIGNAL,
        BUSY_SIGNAL,
        LAST_SIGNAL
};

static void anjuta_launcher_class_init (AnjutaLauncherClass * klass);
static void anjuta_launcher_init (AnjutaLauncher * obj);
static gboolean anjuta_launcher_call_execution_done (gpointer data);
static gboolean anjuta_launcher_check_for_execution_done (gpointer data);
static void anjuta_launcher_execution_done_cleanup (AnjutaLauncher *launcher,
                                                                                                        gboolean emit_signal);

static gboolean is_password_prompt(const gchar* line);

static guint launcher_signals[LAST_SIGNAL] = { 0 };
static AnjutaLauncherClass *parent_class;

static void
anjuta_launcher_initialize (AnjutaLauncher *obj)
{
        /* Busy flag */
        obj->priv->busy = FALSE;
        
        /* These flags are used to synchronize the IO operations. */
        obj->priv->stdout_is_done = FALSE;
        obj->priv->stderr_is_done = FALSE;
        
        /* GIO channels */
        obj->priv->stdout_channel = NULL;
        obj->priv->stderr_channel = NULL;
        obj->priv->pty_channel = NULL;
        
        /* Output line buffers */
        obj->priv->stdout_buffer = NULL;
        obj->priv->stderr_buffer = NULL;
        
        /* Pty buffer */
        obj->priv->pty_output_buffer = NULL;
        
        obj->priv->terminal_echo_on = TRUE;
        
        /* The child */
        obj->priv->child_pid = 0;
        obj->priv->child_status = -1;
        obj->priv->child_has_terminated = TRUE;
        obj->priv->source = 0;
        
        /* Synchronization in progress */
        obj->priv->in_cleanup = FALSE;
        obj->priv->completion_check_timeout = -1;
        
        /* Terminate child on child exit */
        obj->priv->terminate_on_exit = FALSE;

        /* Start time of execution */
        obj->priv->start_time = 0;
        
        obj->priv->buffered_output = TRUE;
        obj->priv->check_for_passwd_prompt = TRUE;
        
        /* Output callback */
        obj->priv->output_callback = NULL;
        obj->priv->callback_data = NULL;
        
        /* Encoding */
        obj->priv->custom_encoding = FALSE;
        obj->priv->encoding = NULL;
        
        /* Env */
        obj->priv->env = g_hash_table_new_full (g_str_hash, g_str_equal,
                                                                                        g_free, g_free);
}

GType
anjuta_launcher_get_type ()
{
        static GType obj_type = 0;
        
        if (!obj_type)
        {
                static const GTypeInfo obj_info = 
                {
                        sizeof (AnjutaLauncherClass),
                        (GBaseInitFunc) NULL,
                        (GBaseFinalizeFunc) NULL,
                        (GClassInitFunc) anjuta_launcher_class_init,
                        (GClassFinalizeFunc) NULL,
                        NULL,           /* class_data */
                        sizeof (AnjutaLauncher),
                        0,              /* n_preallocs */
                        (GInstanceInitFunc) anjuta_launcher_init,
                        NULL            /* value_table */
                };
                obj_type = g_type_register_static (G_TYPE_OBJECT,
                                                   "AnjutaLauncher", &obj_info, 0);
        }
        return obj_type;
}

static void
anjuta_launcher_dispose (GObject *obj)
{
        AnjutaLauncher *launcher = ANJUTA_LAUNCHER (obj);
        if (anjuta_launcher_is_busy (launcher))
        {
                g_source_remove (launcher->priv->source);
                launcher->priv->source = 0;
                
                anjuta_launcher_execution_done_cleanup (launcher, FALSE);
                
                launcher->priv->busy = FALSE;
                
        }
        G_OBJECT_CLASS (parent_class)->dispose (obj);
}

static void
anjuta_launcher_finalize (GObject *obj)
{
        AnjutaLauncher *launcher = ANJUTA_LAUNCHER (obj);       
        if (launcher->priv->custom_encoding && launcher->priv->encoding)
                g_free (launcher->priv->encoding);
        
        g_hash_table_destroy (launcher->priv->env);
        
        g_free (launcher->priv);
        G_OBJECT_CLASS (parent_class)->finalize (obj);
}

static void
anjuta_launcher_class_init (AnjutaLauncherClass * klass)
{
        GObjectClass *object_class;
        g_return_if_fail (klass != NULL);
        object_class = (GObjectClass *) klass;
        
        /* DEBUG_PRINT ("Initializing launcher class"); */
        
        parent_class = g_type_class_peek_parent (klass);

        /**
         * AnjutaLauncher::child-exited
         * @launcher: a #AnjutaLancher object.
         * @child_pid: process ID of the child
         * @status: status as returned by waitpid function
         * @time: time in seconds taken by the child
         * 
         * Emitted when the child has exited and all i/o channels have
         * been closed. If the terminate on exit flag is set, the i/o
         * channels are automatically closed when the child exit.
         * You need to use WEXITSTATUS and friend to get the child exit
         * code from the status returned.
         **/
        launcher_signals[CHILD_EXITED_SIGNAL] =
                g_signal_new ("child-exited",
                                        G_TYPE_FROM_CLASS (object_class),
                                        G_SIGNAL_RUN_FIRST,
                                        G_STRUCT_OFFSET (AnjutaLauncherClass,
                                                                         child_exited),
                                        NULL, NULL,
                                        anjuta_cclosure_marshal_VOID__INT_INT_ULONG,
                                        G_TYPE_NONE, 3, G_TYPE_INT,
                                        G_TYPE_INT, G_TYPE_ULONG);
        
        /**
         * AnjutaLauncher::busy
         * @launcher: a #AnjutaLancher object.
         * @busy: TRUE is a child is currently running
         * 
         * Emitted when a child starts after a call to one execute function
         * (busy is TRUE) or when a child exits and all i/o channels are
         * closed (busy is FALSE).
         **/
        launcher_signals[BUSY_SIGNAL] =
                g_signal_new ("busy",
                                        G_TYPE_FROM_CLASS (object_class),
                                        G_SIGNAL_RUN_FIRST,
                                        G_STRUCT_OFFSET (AnjutaLauncherClass,
                                                                         busy),
                                        NULL, NULL,
                                        anjuta_cclosure_marshal_VOID__BOOLEAN,
                                        G_TYPE_NONE, 1, G_TYPE_BOOLEAN);
        
        object_class->dispose = anjuta_launcher_dispose;
        object_class->finalize = anjuta_launcher_finalize;
}

static void
anjuta_launcher_init (AnjutaLauncher * obj)
{
        g_return_if_fail (obj != NULL);
        obj->priv = g_new0 (AnjutaLauncherPriv, 1);
        anjuta_launcher_initialize (obj);
}

/**
 * anjuta_launcher_is_busy:
 * @launcher: a #AnjutaLancher object.
 *
 * Tells if the laucher is currently executing any command.
 *
 * Return value: TRUE if launcher is busy, otherwisee FALSE.
 */
gboolean
anjuta_launcher_is_busy (AnjutaLauncher *launcher)
{
        return launcher->priv->busy;
}

static void
anjuta_launcher_set_busy (AnjutaLauncher *launcher, gboolean flag)
{
        gboolean old_busy = launcher->priv->busy;
        launcher->priv->busy = flag;
        if (old_busy != flag)
                g_signal_emit_by_name (G_OBJECT (launcher), "busy", flag);
}

/**
 * anjuta_launcher_send_stdin:
 * @launcher: a #AnjutaLancher object.
 * @input_str: The string to send to STDIN of the process.
 * 
 * Sends a string to Standard input of the process currently being executed.
 */
void
anjuta_launcher_send_stdin (AnjutaLauncher *launcher, const gchar * input_str)
{
        g_return_if_fail (launcher);
        g_return_if_fail (input_str);

        anjuta_launcher_send_ptyin (launcher, input_str);
}

/**
 * anjuta_launcher_send_stdin:
 * @launcher: a #AnjutaLancher object.
 * 
 * Sends a EOF to Standard input of the process currently being executed.
 */

void 
anjuta_launcher_send_stdin_eof (AnjutaLauncher *launcher)
{
        GError* err = NULL;
        g_io_channel_shutdown (launcher->priv->pty_channel, TRUE,
                                                   &err);
        g_io_channel_unref (launcher->priv->pty_channel);
        launcher->priv->pty_channel = NULL;
        
        if (err)
        {
                g_warning ("g_io_channel_shutdown () failed: %s", err->message);
        }
}

/**
 * anjuta_launcher_send_ptyin:
 * @launcher: a #AnjutaLancher object.
 * @input_str: The string to send to PTY of the process.
 * 
 * Sends a string to TTY input of the process currently being executed.
 * Mostly useful for entering passwords and other inputs which are directly
 * read from TTY input of the process.
 */
void
anjuta_launcher_send_ptyin (AnjutaLauncher *launcher, const gchar * input_str)
{
        gsize bytes_written;
        GError *err = NULL;
        
        if (!input_str || strlen (input_str) == 0) return;

        do
        {       
                g_io_channel_write_chars (launcher->priv->pty_channel,
                                                          input_str, strlen (input_str),
                                                          &bytes_written, &err);
                g_io_channel_flush (launcher->priv->pty_channel, NULL);
                if (err)
                {
                        g_warning ("Error encountered while writing to PTY!. %s",
                                           err->message);
                        g_error_free (err);

                        return;
                }
                input_str += bytes_written;
        }
        while (*input_str);
}

/**
 * anjuta_launcher_reset:
 * @launcher: a #AnjutaLancher object.
 * 
 * Resets the launcher and kills (SIGTERM) current process, if it is still
 * executing.
 */
void
anjuta_launcher_reset (AnjutaLauncher *launcher)
{
        if (anjuta_launcher_is_busy (launcher))
                kill (launcher->priv->child_pid, SIGTERM);
}

/**
 * anjuta_launcher_signal:
 * @launcher: a #AnjutaLancher object.
 * @sig: kernel signal ID (e.g. SIGTERM).
 *
 * Sends a kernel signal to the process that is being executed.
 */
void
anjuta_launcher_signal (AnjutaLauncher *launcher, int sig)
{
        kill (launcher->priv->child_pid, sig);
}

/**
 * anjuta_launcher_get_child_pid:
 * @launcher: a #AnjutaLancher object.
 * 
 * Gets the Process ID of the child being executed.
 *
 * Return value: Process ID of the child.
 */
pid_t
anjuta_launcher_get_child_pid (AnjutaLauncher *launcher)
{
  if (anjuta_launcher_is_busy (launcher))
    return launcher->priv->child_pid;
  else
    return -1;
}

static void
anjuta_launcher_synchronize (AnjutaLauncher *launcher)
{
        if (launcher->priv->in_cleanup) return;

        if (launcher->priv->child_has_terminated &&
                launcher->priv->stdout_is_done &&
                launcher->priv->stderr_is_done)
        {
                if (launcher->priv->completion_check_timeout >= 0)
                        g_source_remove (launcher->priv->completion_check_timeout);
                launcher->priv->completion_check_timeout = 
                    g_timeout_add (50, anjuta_launcher_check_for_execution_done,
                                                         launcher);
        }
        
        /* This case is not very good, but it blocks the whole IDE
        because we never new if the child has finished */
        else if (launcher->priv->stdout_is_done &&
                         launcher->priv->stderr_is_done)
        {
                /* DEBUG_PRINT ("Child has't exited yet waiting for 200ms"); */
                if (launcher->priv->completion_check_timeout >= 0)
                        g_source_remove (launcher->priv->completion_check_timeout);
                launcher->priv->completion_check_timeout = 
                    g_timeout_add(200, anjuta_launcher_check_for_execution_done,
                                                        launcher);
        }
        /* Add this case for gdb. It creates child inheriting gdb
         * pipes which are not closed if gdb crashes */
        else if (launcher->priv->child_has_terminated &&
                        launcher->priv->terminate_on_exit)
        {
                if (launcher->priv->completion_check_timeout >= 0)
                        g_source_remove (launcher->priv->completion_check_timeout);
                launcher->priv->completion_check_timeout = 
                    g_timeout_add(0, anjuta_launcher_call_execution_done,
                                                        launcher);
        }
}

/* Password dialog */
static GtkWidget*
create_password_dialog (const gchar* prompt)
{
        GtkWidget *dialog;
        GtkWidget *hbox;
        GtkWidget *box;
        GtkWidget *icon;
        GtkWidget *label;
        GtkWidget *entry;
        
        g_return_val_if_fail (prompt, NULL);
        
        dialog = gtk_dialog_new_with_buttons (prompt,
                                NULL, //FIXME: Pass the parent window here
                                                        // for transient purpose.
                                GTK_DIALOG_DESTROY_WITH_PARENT,
                                GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
                                GTK_STOCK_OK, GTK_RESPONSE_OK, NULL);
        gtk_dialog_set_default_response (GTK_DIALOG (dialog), GTK_RESPONSE_OK);

        gtk_window_set_wmclass (GTK_WINDOW (dialog), "launcher-password-prompt",
                                                        "anjuta");
        hbox = gtk_hbox_new (FALSE, 10);
        gtk_widget_show (hbox);
        gtk_container_add (GTK_CONTAINER (GTK_DIALOG(dialog)->vbox), hbox);
        
        icon = anjuta_res_get_image (ANJUTA_PIXMAP_PASSWORD);
        gtk_widget_show (icon);
        gtk_box_pack_start_defaults (GTK_BOX(hbox), icon);
        
        if (strlen (prompt) < 20) {
                box = gtk_hbox_new (FALSE, 5);
        } else {
                box = gtk_vbox_new (FALSE, 5);
        }
        gtk_widget_show (box);
        gtk_box_pack_start_defaults (GTK_BOX (hbox), box);
        
        label = gtk_label_new (_(prompt));
        gtk_widget_show (label);
        gtk_box_pack_start (GTK_BOX (box), label, FALSE, FALSE, 0);
        
        entry = gtk_entry_new ();
        gtk_widget_show (entry);
        gtk_entry_set_visibility (GTK_ENTRY (entry), FALSE);
        gtk_box_pack_start (GTK_BOX (box), entry, FALSE, FALSE, 0);
        
        gtk_widget_ref (entry);
        g_object_set_data_full (G_OBJECT (dialog), "password_entry",
                                                          gtk_widget_ref (entry),
                                                          (GDestroyNotify) gtk_widget_unref);
        gtk_widget_grab_focus (entry);
        gtk_entry_set_activates_default (GTK_ENTRY (entry), TRUE);
        
        return dialog;
}

/* pty buffer check for password authentication */
static void
anjuta_launcher_check_password_real (AnjutaLauncher *launcher,
                                                                         const gchar* last_line)
{       
        if (anjuta_launcher_is_busy (launcher) == FALSE) 
                return;
        
        if (last_line) {

                /* DEBUG_PRINT ("(In password) Last line = %s", last_line); */
                if (is_password_prompt(last_line)) {
                        /* Password prompt detected */
                        GtkWidget* dialog;
                        gint button;
                        const gchar* passwd;
                        gchar* line;
                        
                        dialog = create_password_dialog (last_line);
                        button = gtk_dialog_run (GTK_DIALOG(dialog));
                        switch (button) {
                                case GTK_RESPONSE_OK:
                                        passwd = gtk_entry_get_text (
                                                GTK_ENTRY (g_object_get_data (G_OBJECT (dialog),
                                                                        "password_entry")));
                                        line = g_strconcat (passwd, "\n", NULL);
                                        anjuta_launcher_send_ptyin (launcher, line);
                                        g_free (line);
                                        break;
                                case GTK_RESPONSE_CANCEL:
                                        anjuta_launcher_reset (launcher);
                                        break;
                                default:
                                        break;
                        }
                        gtk_widget_destroy (dialog);
                }
        }
}

static void
anjuta_launcher_check_password (AnjutaLauncher *launcher, const gchar *chars)
{
        glong start, end;
        gchar *last_line;

        if (!chars || strlen(chars) <= 0)
                return;
        
        /* DEBUG_PRINT ("Chars buffer = %s", chars); */
        start = end = strlen (chars);
        while (start > 0 && chars[start-1] != '\n') start--;

        if (end > start)
        {
                last_line = g_strndup (&chars[start], end - start + 1);

                /* DEBUG_PRINT ("Last line = %s", last_line); */
                /* Checks for password, again */
                anjuta_launcher_check_password_real (launcher, last_line);
                g_free (last_line);
        }
}

static gboolean
is_password_prompt (const gchar* line)
{
        const gchar* password = "assword";
        const gchar* passphrase = "assphrase";
        
        if (strlen (line) < strlen (password)
                || strlen (line) < strlen (passphrase))
                        return FALSE;
        
        if (g_strstr_len(line, 80, password) != NULL
                || g_strstr_len(line, 80, passphrase) != NULL)
        {
                int i;
                for (i = strlen(line) - 1; i != 0; --i)
                {
                        if (line[i] == ':')
                                        return TRUE;
                        if (g_ascii_isspace(line[i]))
                                continue;
                        else
                                return FALSE;
                }
        }
        return FALSE;
}

static void
anjuta_launcher_buffered_output (AnjutaLauncher *launcher,
                                                                 AnjutaLauncherOutputType output_type,
                                                                 const gchar *chars)
{
        gchar *all_lines;
        gchar *incomplete_line;
        gchar **buffer;

        g_return_if_fail (chars != NULL);
        g_return_if_fail (strlen (chars) > 0);

        if (launcher->priv->output_callback == NULL)
                return;
        if (launcher->priv->buffered_output == FALSE)
        {
                (launcher->priv->output_callback)(launcher, output_type, chars,
                                                                                  launcher->priv->callback_data);
                return;
        }
        switch (output_type)
        {
        case ANJUTA_LAUNCHER_OUTPUT_STDOUT:
                buffer = &launcher->priv->stdout_buffer;
                break;
        case ANJUTA_LAUNCHER_OUTPUT_STDERR:
                buffer = &launcher->priv->stderr_buffer;
                break;
        default:
                g_warning ("Should not reach here");
                return;
        }
        if (*buffer) 
                all_lines = g_strconcat (*buffer, chars, NULL);
        else
                all_lines = g_strdup (chars);
        
        /* Buffer the last incomplete line */
        incomplete_line = all_lines + strlen (all_lines);
        while (incomplete_line > all_lines &&
                   *incomplete_line != '\n')
        {
                incomplete_line = g_utf8_prev_char (incomplete_line);
        }
        if (*incomplete_line == '\n')
                incomplete_line++;
        
        /* Update line buffer */
        g_free(*buffer);
        *buffer = NULL;
        if (strlen(incomplete_line))
        {
                *buffer = g_strdup (incomplete_line);
                /* DEBUG_PRINT ("Line buffer for %d: %s", output_type, incomplete_line); */
        }
        /* Check for password prompt */
        if (launcher->priv->check_for_passwd_prompt)
                anjuta_launcher_check_password (launcher, incomplete_line);
        
        /* Deliver complete lines */
        *incomplete_line = '\0';
        if (strlen (all_lines) > 0)
                (launcher->priv->output_callback)(launcher, output_type, all_lines,
                                                                                  launcher->priv->callback_data);
        g_free (all_lines);
}

static gboolean
anjuta_launcher_scan_output (GIOChannel *channel, GIOCondition condition,
                                                         AnjutaLauncher *launcher)
{
        gsize n;
        gchar buffer[FILE_BUFFER_SIZE];
        gboolean ret = TRUE;

        if (condition & G_IO_IN)
        {
                GError *err = NULL;
                do
                {
                        g_io_channel_read_chars (channel, buffer, FILE_BUFFER_SIZE-1, &n, &err);
                        if (n > 0) /* There is output */
                        {
                                gchar *utf8_chars = NULL;
                                buffer[n] = '\0';
                                if (!launcher->priv->custom_encoding)
                                        utf8_chars = anjuta_util_convert_to_utf8 (buffer);
                                else
                                        utf8_chars = g_strdup(buffer);
                                anjuta_launcher_buffered_output (launcher,
                                                                                                 ANJUTA_LAUNCHER_OUTPUT_STDOUT,
                                                                                                 utf8_chars);
                                g_free (utf8_chars);
                        }
                        /* Ignore illegal characters */
                        if (err && err->domain == G_CONVERT_ERROR)
                        {
                                g_error_free (err);
                                err = NULL;
                        }
                        /* The pipe is closed on the other side */
                        /* if not related to non blocking read or interrupted syscall */
                        else if (err && errno != EAGAIN && errno != EINTR)
                        {
                                launcher->priv->stdout_is_done = TRUE;
                                anjuta_launcher_synchronize (launcher);
                                ret = FALSE;
                        }
                /* Read next chars if buffer was too small
                 * (the maximum length of one character is 6 bytes) */
                } while (!err && (n > FILE_BUFFER_SIZE - 7));
                if (err)
                        g_error_free (err);
        }
        if ((condition & G_IO_ERR) || (condition & G_IO_HUP))
        {
                DEBUG_PRINT ("launcher.c: STDOUT pipe closed");
                launcher->priv->stdout_is_done = TRUE;
                anjuta_launcher_synchronize (launcher);
                ret = FALSE;
        }
        return ret;
}

static gboolean
anjuta_launcher_scan_error (GIOChannel *channel, GIOCondition condition,
                                                        AnjutaLauncher *launcher)
{
        gsize n;
        gchar buffer[FILE_BUFFER_SIZE];
        gboolean ret = TRUE;
        
        if (condition & G_IO_IN)
        {
                GError *err = NULL;
                do
                {
                        g_io_channel_read_chars (channel, buffer, FILE_BUFFER_SIZE-1, &n, &err);
                        if (n > 0) /* There is stderr output */
                        {
                                gchar *utf8_chars;
                                buffer[n] = '\0';
                                utf8_chars = anjuta_util_convert_to_utf8 (buffer);
                                anjuta_launcher_buffered_output (launcher,
                                                                                                 ANJUTA_LAUNCHER_OUTPUT_STDERR,
                                                                                                 utf8_chars);
                                g_free (utf8_chars);
                        }
                        /* Ignore illegal characters */
                        if (err && err->domain == G_CONVERT_ERROR)
                        {
                                g_error_free (err);
                                err = NULL;
                        }
                        /* The pipe is closed on the other side */
                        /* if not related to non blocking read or interrupted syscall */
                        else if (err && errno != EAGAIN && errno != EINTR)
                        {
                                
                                launcher->priv->stderr_is_done = TRUE;
                                anjuta_launcher_synchronize (launcher);
                                ret = FALSE;
                        }
                /* Read next chars if buffer was too small
                 * (the maximum length of one character is 6 bytes) */
                } while (!err && (n > FILE_BUFFER_SIZE - 7));
                if (err)
                        g_error_free (err);
        }
        if ((condition & G_IO_ERR) || (condition & G_IO_HUP))
        {
                DEBUG_PRINT ("launcher.c: STDERR pipe closed");
                launcher->priv->stderr_is_done = TRUE;
                anjuta_launcher_synchronize (launcher);
                ret = FALSE;
        }
        return ret;
}

static gboolean
anjuta_launcher_scan_pty (GIOChannel *channel, GIOCondition condition,
                                                  AnjutaLauncher *launcher)
{
        gsize n;
        gchar buffer[FILE_BUFFER_SIZE];
        gboolean ret = TRUE;
        
        if (condition & G_IO_IN)
        {
                GError *err = NULL;
                do
                {
                        g_io_channel_read_chars (channel, buffer, FILE_BUFFER_SIZE-1, &n, &err);
                        if (n > 0) /* There is stderr output */
                        {
                                gchar *utf8_chars;
                                gchar *old_str = launcher->priv->pty_output_buffer;
                                buffer[n] = '\0';
                                utf8_chars = anjuta_util_convert_to_utf8 (buffer);
                                if (old_str)
                                {
                                        gchar *str = g_strconcat (old_str, utf8_chars, NULL);
                                        launcher->priv->pty_output_buffer = str;
                                        g_free (old_str);
                                }
                                else
                                        launcher->priv->pty_output_buffer = g_strdup (utf8_chars);
                                g_free (utf8_chars);
                        }
                        /* Ignore illegal characters */
                        if (err && err->domain == G_CONVERT_ERROR)
                        {
                                g_error_free (err);
                                err = NULL;
                        }
                        /* The pipe is closed on the other side */
                        /* if not related to non blocking read or interrupted syscall */
                        else if (err && errno != EAGAIN && errno != EINTR)
                        {
                                ret = FALSE;
                        }
                /* Read next chars if buffer was too small
                 * (the maximum length of one character is 6 bytes) */
                } while (!err && (n > FILE_BUFFER_SIZE - 7));
                if (err)
                        g_error_free (err);
                if (launcher->priv->check_for_passwd_prompt
                        && launcher->priv->pty_output_buffer
                        && strlen (launcher->priv->pty_output_buffer) > 0)
                {
                        anjuta_launcher_check_password (launcher,
                                                                                        launcher->priv->pty_output_buffer);
                }
        }
        /* In pty case, we handle the cases in different invocations */
        /* Do not hook up for G_IO_HUP */
        if (condition & G_IO_ERR)
        {
                DEBUG_PRINT ("launcher.c: PTY pipe error!");
                ret = FALSE;
        }
        return ret;
}

static void
anjuta_launcher_execution_done_cleanup (AnjutaLauncher *launcher,
                                                                                gboolean emit_signal)
{
        gint child_status, child_pid;
        time_t start_time;

        if (launcher->priv->in_cleanup)
                return;

        launcher->priv->in_cleanup = TRUE;

        /* Remove pending timeout */
        if (launcher->priv->completion_check_timeout >= 0)
                g_source_remove (launcher->priv->completion_check_timeout);
        
        /* Make sure all pending I/O are flushed out */
        while (g_main_context_pending (NULL))
                g_main_context_iteration (NULL, FALSE);
        
        /* Can be called again, while waiting in the previous line
         * Do nothing if clean up is already done */
        if (launcher->priv->stdout_channel)
        {       
                g_io_channel_shutdown (launcher->priv->stdout_channel, emit_signal, NULL);
                g_io_channel_unref (launcher->priv->stdout_channel);
                g_source_remove (launcher->priv->stdout_watch);
        }

        if (launcher->priv->stderr_channel)
        {
                g_io_channel_shutdown (launcher->priv->stderr_channel, emit_signal, NULL);
                g_io_channel_unref (launcher->priv->stderr_channel);
                g_source_remove (launcher->priv->stderr_watch);
        }

        if (launcher->priv->pty_channel)
        {
                g_io_channel_shutdown (launcher->priv->pty_channel, emit_signal, NULL);
                g_io_channel_unref (launcher->priv->pty_channel);
        
                g_source_remove (launcher->priv->pty_watch);
        }

        if (launcher->priv->pty_output_buffer)
                g_free (launcher->priv->pty_output_buffer);
        if (launcher->priv->stdout_buffer)
                g_free (launcher->priv->stdout_buffer);
        if (launcher->priv->stderr_buffer)
                g_free (launcher->priv->stdout_buffer);
        
        /* Save them before we re-initialize */
        child_status = launcher->priv->child_status;
        child_pid = launcher->priv->child_pid;
        start_time = launcher->priv->start_time;
        
        if (emit_signal)
                anjuta_launcher_set_busy (launcher, FALSE);
        
        anjuta_launcher_initialize (launcher);
        
        
        /* Call this here, after set_busy (FALSE) so we are able to 
           launch a new child from the terminate function.
           (by clubfan 2002-04-07)
        */
        /* DEBUG_PRINT ("Exit status: %d", child_status); */
        if (emit_signal)
                g_signal_emit_by_name (launcher, "child-exited", child_pid,
                                                           child_status,
                                                           time (NULL) - start_time);
}

/* Using this function is necessary because
 * anjuta_launcher_execution_done_cleanup needs to be called in the same
 * thread than the gtk main loop */
static gboolean
anjuta_launcher_call_execution_done (gpointer data)
{
        AnjutaLauncher *launcher = data;

        launcher->priv->completion_check_timeout = -1;
        anjuta_launcher_execution_done_cleanup (launcher, TRUE);
        return FALSE;
}

/* monitors closure of stdout stderr and pty through a gtk_timeout_add setup */
static gboolean
anjuta_launcher_check_for_execution_done (gpointer data)
{
        AnjutaLauncher *launcher = data;
        /*
        DEBUG_PRINT ("launcher_execution_done STDOUT:%d, STDERR:%d",
                                 launcher->priv->stdout_is_done ? 1 : 0,
                                 launcher->priv->stderr_is_done ? 1 : 0);
        */
        if (launcher->priv->stdout_is_done == FALSE ||
            launcher->priv->stderr_is_done == FALSE)
                return TRUE;
        if (launcher->priv->child_has_terminated == FALSE)
        {
                /* DEBUG_PRINT ("launcher: We missed the exit of the child"); */
        }
        launcher->priv->completion_check_timeout = -1;
        anjuta_launcher_execution_done_cleanup (launcher, TRUE);
        return FALSE;
}

static void
anjuta_launcher_child_terminated (GPid pid, gint status, gpointer data)
{
        AnjutaLauncher *launcher = data;
        
        g_return_if_fail(ANJUTA_IS_LAUNCHER(launcher));
        
        /* Save child exit code */
        launcher->priv->child_status = status;
        launcher->priv->child_has_terminated = TRUE;
        anjuta_launcher_synchronize (launcher);
}


static gboolean
anjuta_launcher_set_encoding_real (AnjutaLauncher *launcher, const gchar *charset)
{
        GIOStatus s;
        gboolean r = TRUE;

        g_return_val_if_fail (launcher != NULL, FALSE);
        // charset can be NULL
                
        s = g_io_channel_set_encoding (launcher->priv->stderr_channel, charset, NULL);
        if (s != G_IO_STATUS_NORMAL) r = FALSE;
        s = g_io_channel_set_encoding (launcher->priv->stdout_channel, charset, NULL);
        if (s != G_IO_STATUS_NORMAL) r = FALSE;
        s = g_io_channel_set_encoding (launcher->priv->pty_channel, charset, NULL);
        if (s != G_IO_STATUS_NORMAL) r = FALSE;

        if (! r)
        {
                g_warning ("launcher.c: Failed to set channel encoding!");
        }
        return r;
}


/**
 * anjuta_launcher_set_encoding:
 * @launcher: a #AnjutaLancher object.
 * @charset: Character set to use for Input/Output with the process.
 * 
 * Sets the character set to use for Input/Output with the process.
 *
 */
void
anjuta_launcher_set_encoding (AnjutaLauncher *launcher, const gchar *charset)
{
        if (launcher->priv->custom_encoding)
                g_free (launcher->priv->encoding);
        
        launcher->priv->custom_encoding = TRUE;
        if (charset)
          launcher->priv->encoding = g_strdup(charset);
        else
          launcher->priv->encoding = NULL;              
}

static pid_t
anjuta_launcher_fork (AnjutaLauncher *launcher, gchar *const args[], gchar *const envp[])
{
        char *working_dir;
        int pty_master_fd, md;
        int stdout_pipe[2], stderr_pipe[2];
        pid_t child_pid;
        struct termios termios_flags;
        gchar * const *env;
        
        working_dir = g_get_current_dir ();
        
        /* The pipes */
        pipe (stderr_pipe);
        pipe (stdout_pipe);

        /* Fork the command */
        child_pid = forkpty (&pty_master_fd, NULL, NULL, NULL);
        if (child_pid == 0)
        {
                close (2);
                dup (stderr_pipe[1]);
                close (1);
                dup (stdout_pipe[1]);
                
                /* Close unnecessary pipes */
                close (stderr_pipe[0]);
                close (stdout_pipe[0]);
                
                /*
                if ((ioctl(pty_slave_fd, TIOCSCTTY, NULL))
                        perror ("Could not set new controlling tty");
                */
                /* Set no delays for the write pipes (non_buffered) so
                that we get all the outputs immidiately */
                if ((md = fcntl (stdout_pipe[1], F_GETFL)) != -1)
                        fcntl (stdout_pipe[1], F_SETFL, O_SYNC | md);
                if ((md = fcntl (stderr_pipe[1], F_GETFL)) != -1)
                        fcntl (stderr_pipe[1], F_SETFL, O_SYNC | md);
                
                /* Set up environment */
                if (envp != NULL)
                {
                        GString *variable = g_string_new (NULL);
                        for (env = envp; *env != NULL; env++)
                        {
                                gchar *value = strchr (*env, '=');

                                if (value == NULL)
                                {
                                        g_setenv (*env, NULL, TRUE);
                                }
                                else
                                {
                                        g_string_truncate (variable, 0);
                                        g_string_append_len (variable, *env, value - *env);
                                        g_setenv (variable->str, value + 1, TRUE);
                                }
                        }
                }
        
                execvp (args[0], args);
                g_warning (_("Cannot execute command: \"%s\""), args[0]);
                perror(_("execvp failed"));
                _exit(-1);
        }
        g_free (working_dir);
        
        /* Close parent's side pipes */
        close (stderr_pipe[1]);
        close (stdout_pipe[1]);
        
        if (child_pid < 0)
        {
                g_warning ("launcher.c: Fork failed!");
                /* Close parent's side pipes */
                close (stderr_pipe[0]);
                close (stdout_pipe[0]);
                return child_pid;
        }
        
        /*
        *  Set pipes none blocking, so we can read big buffers
        *  in the callback without having to use FIONREAD
        *  to make sure the callback doesn't block.
        */
        if ((md = fcntl (stdout_pipe[0], F_GETFL)) != -1)
                fcntl (stdout_pipe[0], F_SETFL, O_NONBLOCK | md);
        if ((md = fcntl (stderr_pipe[0], F_GETFL)) != -1)
                fcntl (stderr_pipe[0], F_SETFL, O_NONBLOCK | md);
        if ((md = fcntl (pty_master_fd, F_GETFL)) != -1)
                fcntl (pty_master_fd, F_SETFL, O_NONBLOCK | md);
        
        launcher->priv->child_pid = child_pid;
        launcher->priv->stderr_channel = g_io_channel_unix_new (stderr_pipe[0]);
        launcher->priv->stdout_channel = g_io_channel_unix_new (stdout_pipe[0]);
        launcher->priv->pty_channel = g_io_channel_unix_new (pty_master_fd);

        g_io_channel_set_buffer_size (launcher->priv->pty_channel, FILE_INPUT_BUFFER_SIZE);

        if (!launcher->priv->custom_encoding)
          g_get_charset ((const gchar**)&launcher->priv->encoding);
        anjuta_launcher_set_encoding_real (launcher, launcher->priv->encoding);
        
        tcgetattr(pty_master_fd, &termios_flags);
        termios_flags.c_iflag &= ~(IGNPAR | INPCK | INLCR | IGNCR | ICRNL | IXON |
                                        IXOFF | ISTRIP);
        termios_flags.c_iflag |= IGNBRK | BRKINT | IMAXBEL | IXANY;
        termios_flags.c_oflag &= ~OPOST;
//      termios_flags.c_oflag |= 0;
        termios_flags.c_cflag &= ~(CSTOPB | PARENB | HUPCL);
        termios_flags.c_cflag |= CS8 | CLOCAL;

        if (!launcher->priv->terminal_echo_on)
        {
                termios_flags.c_lflag &= ~(ECHOKE | ECHOE | ECHO | ECHONL | 
#ifdef ECHOPRT
                                                ECHOPRT |
#endif
                                                ECHOCTL | ISIG | ICANON | IEXTEN | NOFLSH | TOSTOP);
        }
//      termios_flags.c_lflag |= 0;
        termios_flags.c_cc[VMIN] = 0;
        cfsetospeed(&termios_flags, __MAX_BAUD);
        tcsetattr(pty_master_fd, TCSANOW, &termios_flags);

        launcher->priv->stderr_watch = 
                g_io_add_watch (launcher->priv->stderr_channel,
                                                G_IO_IN | G_IO_ERR | G_IO_HUP,
                                                (GIOFunc)anjuta_launcher_scan_error, launcher);
        launcher->priv->stdout_watch = 
                g_io_add_watch (launcher->priv->stdout_channel,
                                                G_IO_IN | G_IO_ERR | G_IO_HUP,
                                                (GIOFunc)anjuta_launcher_scan_output, launcher);
        launcher->priv->pty_watch = 
                g_io_add_watch (launcher->priv->pty_channel,
                                                G_IO_IN | G_IO_ERR, /* Do not hook up for G_IO_HUP */
                                                (GIOFunc)anjuta_launcher_scan_pty, launcher);
        
        /* DEBUG_PRINT ("Terminal child forked: %d", launcher->priv->child_pid); */
        launcher->priv->source = g_child_watch_add (launcher->priv->child_pid,
                        anjuta_launcher_child_terminated, launcher);
        return child_pid;
}

/**
 * anjuta_launcher_execute_v:
 * @launcher: a #AnjutaLancher object.
 * @argv: Command args.
 * @envp: Additional environment variable.
 * @callback: The callback for delivering output from the process.
 * @callback_data: Callback data for the above callback.
 * 
 * The first of the @args is the command itself. The rest are sent to the
 * as it's arguments. This function works similar to anjuta_launcher_execute().
 * 
 * Return value: TRUE if successfully launched, otherwise FALSE.
 */
gboolean
anjuta_launcher_execute_v (AnjutaLauncher *launcher, gchar *const argv[],
                                                   gchar *const envp[],
                                                   AnjutaLauncherOutputCallback callback,
                                                   gpointer callback_data)
{
        if (anjuta_launcher_is_busy (launcher))
                return FALSE;
        
        anjuta_launcher_set_busy (launcher, TRUE);
        
        launcher->priv->start_time = time (NULL);
        launcher->priv->child_status = 0;
        launcher->priv->stdout_is_done = FALSE;
        launcher->priv->stderr_is_done = FALSE;
        launcher->priv->child_has_terminated = FALSE;
        launcher->priv->in_cleanup = FALSE;
        launcher->priv->output_callback = callback;
        launcher->priv->callback_data = callback_data;
        
        /* On a fork error perform a cleanup and return */
        if (anjuta_launcher_fork (launcher, argv, envp) < 0)
        {
                anjuta_launcher_initialize (launcher);
                return FALSE;
        }
        return TRUE;
}

/**
 * anjuta_launcher_execute:
 * @launcher: a #AnjutaLancher object.
 * @command_str: The command to execute.
 * @callback: The callback for delivering output from the process.
 * @callback_data: Callback data for the above callback.
 * 
 * Executes a command in the launcher. Both outputs (STDOUT and STDERR) are
 * delivered to the above callback. The data are delivered as they arrive
 * from the process and could be of any lenght. If the process asks for
 * passwords, the user will be automatically prompted with a dialog to enter
 * it. Please note that not all formats of the password are recognized. Those
 * with the standard 'assword:' substring in the prompt should work well.
 * 
 * Return value: TRUE if successfully launched, otherwise FALSE.
 */
gboolean
anjuta_launcher_execute (AnjutaLauncher *launcher, const gchar *command_str,
                                                 AnjutaLauncherOutputCallback callback,
                                                 gpointer callback_data)
{
        GList *args_list, *args_list_ptr;
        gchar **args, **args_ptr;
        gboolean ret;
        
        /* Prepare command args */
        args_list = anjuta_util_parse_args_from_string (command_str);
        args = g_new (char*, g_list_length (args_list) + 1);
        args_list_ptr = args_list;
        args_ptr = args;
        while (args_list_ptr)
        {
                *args_ptr = (char*) args_list_ptr->data;
                args_list_ptr = g_list_next (args_list_ptr);
                args_ptr++;
        }
        *args_ptr = NULL;

        ret = anjuta_launcher_execute_v (launcher, args, NULL,
                callback, callback_data);
        g_free (args);
        anjuta_util_glist_strings_free (args_list);
        return ret;
}

/**
 * anjuta_launcher_set_buffered_output:
 * @launcher: a #AnjutaLancher object.
 * @buffered: buffer output.
 * 
 * Sets if output should buffered or not. By default, it is buffered.
 *
 * Return value: Previous flag value
 */
gboolean
anjuta_launcher_set_buffered_output (AnjutaLauncher *launcher, gboolean buffered)
{
        gboolean past_value = launcher->priv->buffered_output;
        launcher->priv->buffered_output = buffered;
        return past_value;
}

/**
 * anjuta_launcher_set_check_passwd_prompt:
 * @launcher: a #AnjutaLancher object.
 * @check_passwd: check for password.
 * 
 * Set if output is checked for a password prompti. A special dialog box
 * is use to enter it in this case. By default, this behavior is enabled.
 *
 * Return value: Previous flag value
 */
gboolean
anjuta_launcher_set_check_passwd_prompt (AnjutaLauncher *launcher, gboolean check_passwd)
{
        gboolean past_value = launcher->priv->check_for_passwd_prompt;
        launcher->priv->check_for_passwd_prompt = check_passwd;
        return past_value;
}

/**
 * anjuta_launcher_set_terminal_echo:
 * @launcher: a #AnjutaLancher object.
 * @echo_on: Echo ON flag.
 * 
 * Sets if input (those given in STDIN) should enabled or disabled. By default,
 * it is disabled.
 *
 * Return value: Previous flag value
 */
gboolean
anjuta_launcher_set_terminal_echo (AnjutaLauncher *launcher,
                                                                   gboolean echo_on)
{
        gboolean past_value = launcher->priv->terminal_echo_on;
        launcher->priv->terminal_echo_on = echo_on;
        return past_value;
}

/**
 * anjuta_launcher_set_terminate_on_exit:
 * @launcher: a #AnjutaLancher object.
 * @terminate_on_exit: terminate on exit flag
 * 
 * When this flag is set, al i/o channels are closed and the child-exit
 * signal is emitted as soon as the child exit. By default, or when this
 * flag is clear, the launcher object wait until the i/o channels are
 * closed.
 *
 * Return value: Previous flag value
 */
gboolean
anjuta_launcher_set_terminate_on_exit (AnjutaLauncher *launcher,
                                                gboolean terminate_on_exit)
{
        gboolean past_value = launcher->priv->terminate_on_exit;
        launcher->priv->terminate_on_exit = terminate_on_exit;
        return past_value;
}

/**
 * anjuta_launcher_new:
 * 
 * Sets if input (those given in STDIN) should enabled or disabled. By default,
 * it is disabled.
 *
 * Return value: a new instance of #AnjutaLancher class.
 */
AnjutaLauncher*
anjuta_launcher_new ()
{
        return g_object_new (ANJUTA_TYPE_LAUNCHER, NULL);
}