diff --git a/src/job.c b/src/job.c
new file mode 100644
index 0000000..0e73b1c
--- /dev/null
+++ b/src/job.c
@@ -0,0 +1,1918 @@
+/* vi:set ts=8 sts=4 sw=4 noet:
+ *
+ * VIM - Vi IMproved	by Bram Moolenaar
+ *
+ * Do ":help uganda"  in Vim to read copying and usage conditions.
+ * Do ":help credits" in Vim to see a list of people who contributed.
+ */
+
+/*
+ * Implements starting jobs and controlling them.
+ */
+
+#include "vim.h"
+
+#if defined(FEAT_JOB_CHANNEL) || defined(PROTO)
+
+#define FOR_ALL_JOBS(job) \
+    for ((job) = first_job; (job) != NULL; (job) = (job)->jv_next)
+
+    static int
+handle_mode(typval_T *item, jobopt_T *opt, ch_mode_T *modep, int jo)
+{
+    char_u	*val = tv_get_string(item);
+
+    opt->jo_set |= jo;
+    if (STRCMP(val, "nl") == 0)
+	*modep = MODE_NL;
+    else if (STRCMP(val, "raw") == 0)
+	*modep = MODE_RAW;
+    else if (STRCMP(val, "js") == 0)
+	*modep = MODE_JS;
+    else if (STRCMP(val, "json") == 0)
+	*modep = MODE_JSON;
+    else
+    {
+	semsg(_(e_invarg2), val);
+	return FAIL;
+    }
+    return OK;
+}
+
+    static int
+handle_io(typval_T *item, ch_part_T part, jobopt_T *opt)
+{
+    char_u	*val = tv_get_string(item);
+
+    opt->jo_set |= JO_OUT_IO << (part - PART_OUT);
+    if (STRCMP(val, "null") == 0)
+	opt->jo_io[part] = JIO_NULL;
+    else if (STRCMP(val, "pipe") == 0)
+	opt->jo_io[part] = JIO_PIPE;
+    else if (STRCMP(val, "file") == 0)
+	opt->jo_io[part] = JIO_FILE;
+    else if (STRCMP(val, "buffer") == 0)
+	opt->jo_io[part] = JIO_BUFFER;
+    else if (STRCMP(val, "out") == 0 && part == PART_ERR)
+	opt->jo_io[part] = JIO_OUT;
+    else
+    {
+	semsg(_(e_invarg2), val);
+	return FAIL;
+    }
+    return OK;
+}
+
+/*
+ * Clear a jobopt_T before using it.
+ */
+    void
+clear_job_options(jobopt_T *opt)
+{
+    CLEAR_POINTER(opt);
+}
+
+/*
+ * Free any members of a jobopt_T.
+ */
+    void
+free_job_options(jobopt_T *opt)
+{
+    if (opt->jo_callback.cb_partial != NULL)
+	partial_unref(opt->jo_callback.cb_partial);
+    else if (opt->jo_callback.cb_name != NULL)
+	func_unref(opt->jo_callback.cb_name);
+    if (opt->jo_out_cb.cb_partial != NULL)
+	partial_unref(opt->jo_out_cb.cb_partial);
+    else if (opt->jo_out_cb.cb_name != NULL)
+	func_unref(opt->jo_out_cb.cb_name);
+    if (opt->jo_err_cb.cb_partial != NULL)
+	partial_unref(opt->jo_err_cb.cb_partial);
+    else if (opt->jo_err_cb.cb_name != NULL)
+	func_unref(opt->jo_err_cb.cb_name);
+    if (opt->jo_close_cb.cb_partial != NULL)
+	partial_unref(opt->jo_close_cb.cb_partial);
+    else if (opt->jo_close_cb.cb_name != NULL)
+	func_unref(opt->jo_close_cb.cb_name);
+    if (opt->jo_exit_cb.cb_partial != NULL)
+	partial_unref(opt->jo_exit_cb.cb_partial);
+    else if (opt->jo_exit_cb.cb_name != NULL)
+	func_unref(opt->jo_exit_cb.cb_name);
+    if (opt->jo_env != NULL)
+	dict_unref(opt->jo_env);
+}
+
+/*
+ * Get the PART_ number from the first character of an option name.
+ */
+    static int
+part_from_char(int c)
+{
+    return c == 'i' ? PART_IN : c == 'o' ? PART_OUT: PART_ERR;
+}
+
+/*
+ * Get the option entries from the dict in "tv", parse them and put the result
+ * in "opt".
+ * Only accept JO_ options in "supported" and JO2_ options in "supported2".
+ * If an option value is invalid return FAIL.
+ */
+    int
+get_job_options(typval_T *tv, jobopt_T *opt, int supported, int supported2)
+{
+    typval_T	*item;
+    char_u	*val;
+    dict_T	*dict;
+    int		todo;
+    hashitem_T	*hi;
+    ch_part_T	part;
+
+    if (tv->v_type == VAR_UNKNOWN)
+	return OK;
+    if (tv->v_type != VAR_DICT)
+    {
+	emsg(_(e_dictreq));
+	return FAIL;
+    }
+    dict = tv->vval.v_dict;
+    if (dict == NULL)
+	return OK;
+
+    todo = (int)dict->dv_hashtab.ht_used;
+    for (hi = dict->dv_hashtab.ht_array; todo > 0; ++hi)
+	if (!HASHITEM_EMPTY(hi))
+	{
+	    item = &dict_lookup(hi)->di_tv;
+
+	    if (STRCMP(hi->hi_key, "mode") == 0)
+	    {
+		if (!(supported & JO_MODE))
+		    break;
+		if (handle_mode(item, opt, &opt->jo_mode, JO_MODE) == FAIL)
+		    return FAIL;
+	    }
+	    else if (STRCMP(hi->hi_key, "in_mode") == 0)
+	    {
+		if (!(supported & JO_IN_MODE))
+		    break;
+		if (handle_mode(item, opt, &opt->jo_in_mode, JO_IN_MODE)
+								      == FAIL)
+		    return FAIL;
+	    }
+	    else if (STRCMP(hi->hi_key, "out_mode") == 0)
+	    {
+		if (!(supported & JO_OUT_MODE))
+		    break;
+		if (handle_mode(item, opt, &opt->jo_out_mode, JO_OUT_MODE)
+								      == FAIL)
+		    return FAIL;
+	    }
+	    else if (STRCMP(hi->hi_key, "err_mode") == 0)
+	    {
+		if (!(supported & JO_ERR_MODE))
+		    break;
+		if (handle_mode(item, opt, &opt->jo_err_mode, JO_ERR_MODE)
+								      == FAIL)
+		    return FAIL;
+	    }
+	    else if (STRCMP(hi->hi_key, "noblock") == 0)
+	    {
+		if (!(supported & JO_MODE))
+		    break;
+		opt->jo_noblock = tv_get_bool(item);
+	    }
+	    else if (STRCMP(hi->hi_key, "in_io") == 0
+		    || STRCMP(hi->hi_key, "out_io") == 0
+		    || STRCMP(hi->hi_key, "err_io") == 0)
+	    {
+		if (!(supported & JO_OUT_IO))
+		    break;
+		if (handle_io(item, part_from_char(*hi->hi_key), opt) == FAIL)
+		    return FAIL;
+	    }
+	    else if (STRCMP(hi->hi_key, "in_name") == 0
+		    || STRCMP(hi->hi_key, "out_name") == 0
+		    || STRCMP(hi->hi_key, "err_name") == 0)
+	    {
+		part = part_from_char(*hi->hi_key);
+
+		if (!(supported & JO_OUT_IO))
+		    break;
+		opt->jo_set |= JO_OUT_NAME << (part - PART_OUT);
+		opt->jo_io_name[part] = tv_get_string_buf_chk(item,
+						   opt->jo_io_name_buf[part]);
+	    }
+	    else if (STRCMP(hi->hi_key, "pty") == 0)
+	    {
+		if (!(supported & JO_MODE))
+		    break;
+		opt->jo_pty = tv_get_bool(item);
+	    }
+	    else if (STRCMP(hi->hi_key, "in_buf") == 0
+		    || STRCMP(hi->hi_key, "out_buf") == 0
+		    || STRCMP(hi->hi_key, "err_buf") == 0)
+	    {
+		part = part_from_char(*hi->hi_key);
+
+		if (!(supported & JO_OUT_IO))
+		    break;
+		opt->jo_set |= JO_OUT_BUF << (part - PART_OUT);
+		opt->jo_io_buf[part] = tv_get_number(item);
+		if (opt->jo_io_buf[part] <= 0)
+		{
+		    semsg(_(e_invargNval), hi->hi_key, tv_get_string(item));
+		    return FAIL;
+		}
+		if (buflist_findnr(opt->jo_io_buf[part]) == NULL)
+		{
+		    semsg(_(e_nobufnr), (long)opt->jo_io_buf[part]);
+		    return FAIL;
+		}
+	    }
+	    else if (STRCMP(hi->hi_key, "out_modifiable") == 0
+		    || STRCMP(hi->hi_key, "err_modifiable") == 0)
+	    {
+		part = part_from_char(*hi->hi_key);
+
+		if (!(supported & JO_OUT_IO))
+		    break;
+		opt->jo_set |= JO_OUT_MODIFIABLE << (part - PART_OUT);
+		opt->jo_modifiable[part] = tv_get_bool(item);
+	    }
+	    else if (STRCMP(hi->hi_key, "out_msg") == 0
+		    || STRCMP(hi->hi_key, "err_msg") == 0)
+	    {
+		part = part_from_char(*hi->hi_key);
+
+		if (!(supported & JO_OUT_IO))
+		    break;
+		opt->jo_set2 |= JO2_OUT_MSG << (part - PART_OUT);
+		opt->jo_message[part] = tv_get_bool(item);
+	    }
+	    else if (STRCMP(hi->hi_key, "in_top") == 0
+		    || STRCMP(hi->hi_key, "in_bot") == 0)
+	    {
+		linenr_T *lp;
+
+		if (!(supported & JO_OUT_IO))
+		    break;
+		if (hi->hi_key[3] == 't')
+		{
+		    lp = &opt->jo_in_top;
+		    opt->jo_set |= JO_IN_TOP;
+		}
+		else
+		{
+		    lp = &opt->jo_in_bot;
+		    opt->jo_set |= JO_IN_BOT;
+		}
+		*lp = tv_get_number(item);
+		if (*lp < 0)
+		{
+		    semsg(_(e_invargNval), hi->hi_key, tv_get_string(item));
+		    return FAIL;
+		}
+	    }
+	    else if (STRCMP(hi->hi_key, "channel") == 0)
+	    {
+		if (!(supported & JO_OUT_IO))
+		    break;
+		opt->jo_set |= JO_CHANNEL;
+		if (item->v_type != VAR_CHANNEL)
+		{
+		    semsg(_(e_invargval), "channel");
+		    return FAIL;
+		}
+		opt->jo_channel = item->vval.v_channel;
+	    }
+	    else if (STRCMP(hi->hi_key, "callback") == 0)
+	    {
+		if (!(supported & JO_CALLBACK))
+		    break;
+		opt->jo_set |= JO_CALLBACK;
+		opt->jo_callback = get_callback(item);
+		if (opt->jo_callback.cb_name == NULL)
+		{
+		    semsg(_(e_invargval), "callback");
+		    return FAIL;
+		}
+	    }
+	    else if (STRCMP(hi->hi_key, "out_cb") == 0)
+	    {
+		if (!(supported & JO_OUT_CALLBACK))
+		    break;
+		opt->jo_set |= JO_OUT_CALLBACK;
+		opt->jo_out_cb = get_callback(item);
+		if (opt->jo_out_cb.cb_name == NULL)
+		{
+		    semsg(_(e_invargval), "out_cb");
+		    return FAIL;
+		}
+	    }
+	    else if (STRCMP(hi->hi_key, "err_cb") == 0)
+	    {
+		if (!(supported & JO_ERR_CALLBACK))
+		    break;
+		opt->jo_set |= JO_ERR_CALLBACK;
+		opt->jo_err_cb = get_callback(item);
+		if (opt->jo_err_cb.cb_name == NULL)
+		{
+		    semsg(_(e_invargval), "err_cb");
+		    return FAIL;
+		}
+	    }
+	    else if (STRCMP(hi->hi_key, "close_cb") == 0)
+	    {
+		if (!(supported & JO_CLOSE_CALLBACK))
+		    break;
+		opt->jo_set |= JO_CLOSE_CALLBACK;
+		opt->jo_close_cb = get_callback(item);
+		if (opt->jo_close_cb.cb_name == NULL)
+		{
+		    semsg(_(e_invargval), "close_cb");
+		    return FAIL;
+		}
+	    }
+	    else if (STRCMP(hi->hi_key, "drop") == 0)
+	    {
+		int never = FALSE;
+		val = tv_get_string(item);
+
+		if (STRCMP(val, "never") == 0)
+		    never = TRUE;
+		else if (STRCMP(val, "auto") != 0)
+		{
+		    semsg(_(e_invargNval), "drop", val);
+		    return FAIL;
+		}
+		opt->jo_drop_never = never;
+	    }
+	    else if (STRCMP(hi->hi_key, "exit_cb") == 0)
+	    {
+		if (!(supported & JO_EXIT_CB))
+		    break;
+		opt->jo_set |= JO_EXIT_CB;
+		opt->jo_exit_cb = get_callback(item);
+		if (opt->jo_exit_cb.cb_name == NULL)
+		{
+		    semsg(_(e_invargval), "exit_cb");
+		    return FAIL;
+		}
+	    }
+#ifdef FEAT_TERMINAL
+	    else if (STRCMP(hi->hi_key, "term_name") == 0)
+	    {
+		if (!(supported2 & JO2_TERM_NAME))
+		    break;
+		opt->jo_set2 |= JO2_TERM_NAME;
+		opt->jo_term_name = tv_get_string_buf_chk(item,
+						       opt->jo_term_name_buf);
+		if (opt->jo_term_name == NULL)
+		{
+		    semsg(_(e_invargval), "term_name");
+		    return FAIL;
+		}
+	    }
+	    else if (STRCMP(hi->hi_key, "term_finish") == 0)
+	    {
+		if (!(supported2 & JO2_TERM_FINISH))
+		    break;
+		val = tv_get_string(item);
+		if (STRCMP(val, "open") != 0 && STRCMP(val, "close") != 0)
+		{
+		    semsg(_(e_invargNval), "term_finish", val);
+		    return FAIL;
+		}
+		opt->jo_set2 |= JO2_TERM_FINISH;
+		opt->jo_term_finish = *val;
+	    }
+	    else if (STRCMP(hi->hi_key, "term_opencmd") == 0)
+	    {
+		char_u *p;
+
+		if (!(supported2 & JO2_TERM_OPENCMD))
+		    break;
+		opt->jo_set2 |= JO2_TERM_OPENCMD;
+		p = opt->jo_term_opencmd = tv_get_string_buf_chk(item,
+						    opt->jo_term_opencmd_buf);
+		if (p != NULL)
+		{
+		    // Must have %d and no other %.
+		    p = vim_strchr(p, '%');
+		    if (p != NULL && (p[1] != 'd'
+					    || vim_strchr(p + 2, '%') != NULL))
+			p = NULL;
+		}
+		if (p == NULL)
+		{
+		    semsg(_(e_invargval), "term_opencmd");
+		    return FAIL;
+		}
+	    }
+	    else if (STRCMP(hi->hi_key, "eof_chars") == 0)
+	    {
+		if (!(supported2 & JO2_EOF_CHARS))
+		    break;
+		opt->jo_set2 |= JO2_EOF_CHARS;
+		opt->jo_eof_chars = tv_get_string_buf_chk(item,
+						       opt->jo_eof_chars_buf);
+		if (opt->jo_eof_chars == NULL)
+		{
+		    semsg(_(e_invargval), "eof_chars");
+		    return FAIL;
+		}
+	    }
+	    else if (STRCMP(hi->hi_key, "term_rows") == 0)
+	    {
+		if (!(supported2 & JO2_TERM_ROWS))
+		    break;
+		opt->jo_set2 |= JO2_TERM_ROWS;
+		opt->jo_term_rows = tv_get_number(item);
+	    }
+	    else if (STRCMP(hi->hi_key, "term_cols") == 0)
+	    {
+		if (!(supported2 & JO2_TERM_COLS))
+		    break;
+		opt->jo_set2 |= JO2_TERM_COLS;
+		opt->jo_term_cols = tv_get_number(item);
+	    }
+	    else if (STRCMP(hi->hi_key, "vertical") == 0)
+	    {
+		if (!(supported2 & JO2_VERTICAL))
+		    break;
+		opt->jo_set2 |= JO2_VERTICAL;
+		opt->jo_vertical = tv_get_bool(item);
+	    }
+	    else if (STRCMP(hi->hi_key, "curwin") == 0)
+	    {
+		if (!(supported2 & JO2_CURWIN))
+		    break;
+		opt->jo_set2 |= JO2_CURWIN;
+		opt->jo_curwin = tv_get_number(item);
+	    }
+	    else if (STRCMP(hi->hi_key, "bufnr") == 0)
+	    {
+		int nr;
+
+		if (!(supported2 & JO2_CURWIN))
+		    break;
+		opt->jo_set2 |= JO2_BUFNR;
+		nr = tv_get_number(item);
+		if (nr <= 0)
+		{
+		    semsg(_(e_invargNval), hi->hi_key, tv_get_string(item));
+		    return FAIL;
+		}
+		opt->jo_bufnr_buf = buflist_findnr(nr);
+		if (opt->jo_bufnr_buf == NULL)
+		{
+		    semsg(_(e_nobufnr), (long)nr);
+		    return FAIL;
+		}
+		if (opt->jo_bufnr_buf->b_nwindows == 0
+			|| opt->jo_bufnr_buf->b_term == NULL)
+		{
+		    semsg(_(e_invarg2), "bufnr");
+		    return FAIL;
+		}
+	    }
+	    else if (STRCMP(hi->hi_key, "hidden") == 0)
+	    {
+		if (!(supported2 & JO2_HIDDEN))
+		    break;
+		opt->jo_set2 |= JO2_HIDDEN;
+		opt->jo_hidden = tv_get_bool(item);
+	    }
+	    else if (STRCMP(hi->hi_key, "norestore") == 0)
+	    {
+		if (!(supported2 & JO2_NORESTORE))
+		    break;
+		opt->jo_set2 |= JO2_NORESTORE;
+		opt->jo_term_norestore = tv_get_bool(item);
+	    }
+	    else if (STRCMP(hi->hi_key, "term_kill") == 0)
+	    {
+		if (!(supported2 & JO2_TERM_KILL))
+		    break;
+		opt->jo_set2 |= JO2_TERM_KILL;
+		opt->jo_term_kill = tv_get_string_buf_chk(item,
+						       opt->jo_term_kill_buf);
+		if (opt->jo_term_kill == NULL)
+		{
+		    semsg(_(e_invargval), "term_kill");
+		    return FAIL;
+		}
+	    }
+	    else if (STRCMP(hi->hi_key, "tty_type") == 0)
+	    {
+		char_u *p;
+
+		if (!(supported2 & JO2_TTY_TYPE))
+		    break;
+		opt->jo_set2 |= JO2_TTY_TYPE;
+		p = tv_get_string_chk(item);
+		if (p == NULL)
+		{
+		    semsg(_(e_invargval), "tty_type");
+		    return FAIL;
+		}
+		// Allow empty string, "winpty", "conpty".
+		if (!(*p == NUL || STRCMP(p, "winpty") == 0
+					          || STRCMP(p, "conpty") == 0))
+		{
+		    semsg(_(e_invargval), "tty_type");
+		    return FAIL;
+		}
+		opt->jo_tty_type = p[0];
+	    }
+# if defined(FEAT_GUI) || defined(FEAT_TERMGUICOLORS)
+	    else if (STRCMP(hi->hi_key, "ansi_colors") == 0)
+	    {
+		int		n = 0;
+		listitem_T	*li;
+		long_u		rgb[16];
+
+		if (!(supported2 & JO2_ANSI_COLORS))
+		    break;
+
+		if (item == NULL || item->v_type != VAR_LIST
+			|| item->vval.v_list == NULL)
+		{
+		    semsg(_(e_invargval), "ansi_colors");
+		    return FAIL;
+		}
+
+		CHECK_LIST_MATERIALIZE(item->vval.v_list);
+		li = item->vval.v_list->lv_first;
+		for (; li != NULL && n < 16; li = li->li_next, n++)
+		{
+		    char_u	*color_name;
+		    guicolor_T	guicolor;
+		    int		called_emsg_before = called_emsg;
+
+		    color_name = tv_get_string_chk(&li->li_tv);
+		    if (color_name == NULL)
+			return FAIL;
+
+		    guicolor = GUI_GET_COLOR(color_name);
+		    if (guicolor == INVALCOLOR)
+		    {
+			if (called_emsg_before == called_emsg)
+			    // may not get the error if the GUI didn't start
+			    semsg(_(e_alloc_color), color_name);
+			return FAIL;
+		    }
+
+		    rgb[n] = GUI_MCH_GET_RGB(guicolor);
+		}
+
+		if (n != 16 || li != NULL)
+		{
+		    semsg(_(e_invargval), "ansi_colors");
+		    return FAIL;
+		}
+
+		opt->jo_set2 |= JO2_ANSI_COLORS;
+		memcpy(opt->jo_ansi_colors, rgb, sizeof(rgb));
+	    }
+# endif
+	    else if (STRCMP(hi->hi_key, "term_highlight") == 0)
+	    {
+		char_u *p;
+
+		if (!(supported2 & JO2_TERM_HIGHLIGHT))
+		    break;
+		opt->jo_set2 |= JO2_TERM_HIGHLIGHT;
+		p = tv_get_string_buf_chk(item, opt->jo_term_highlight_buf);
+		if (p == NULL || *p == NUL)
+		{
+		    semsg(_(e_invargval), "term_highlight");
+		    return FAIL;
+		}
+		opt->jo_term_highlight = p;
+	    }
+	    else if (STRCMP(hi->hi_key, "term_api") == 0)
+	    {
+		if (!(supported2 & JO2_TERM_API))
+		    break;
+		opt->jo_set2 |= JO2_TERM_API;
+		opt->jo_term_api = tv_get_string_buf_chk(item,
+							opt->jo_term_api_buf);
+		if (opt->jo_term_api == NULL)
+		{
+		    semsg(_(e_invargval), "term_api");
+		    return FAIL;
+		}
+	    }
+#endif
+	    else if (STRCMP(hi->hi_key, "env") == 0)
+	    {
+		if (!(supported2 & JO2_ENV))
+		    break;
+		if (item->v_type != VAR_DICT)
+		{
+		    semsg(_(e_invargval), "env");
+		    return FAIL;
+		}
+		opt->jo_set2 |= JO2_ENV;
+		opt->jo_env = item->vval.v_dict;
+		if (opt->jo_env != NULL)
+		    ++opt->jo_env->dv_refcount;
+	    }
+	    else if (STRCMP(hi->hi_key, "cwd") == 0)
+	    {
+		if (!(supported2 & JO2_CWD))
+		    break;
+		opt->jo_cwd = tv_get_string_buf_chk(item, opt->jo_cwd_buf);
+		if (opt->jo_cwd == NULL || !mch_isdir(opt->jo_cwd)
+#ifndef MSWIN  // Win32 directories don't have the concept of "executable"
+				|| mch_access((char *)opt->jo_cwd, X_OK) != 0
+#endif
+				)
+		{
+		    semsg(_(e_invargval), "cwd");
+		    return FAIL;
+		}
+		opt->jo_set2 |= JO2_CWD;
+	    }
+	    else if (STRCMP(hi->hi_key, "waittime") == 0)
+	    {
+		if (!(supported & JO_WAITTIME))
+		    break;
+		opt->jo_set |= JO_WAITTIME;
+		opt->jo_waittime = tv_get_number(item);
+	    }
+	    else if (STRCMP(hi->hi_key, "timeout") == 0)
+	    {
+		if (!(supported & JO_TIMEOUT))
+		    break;
+		opt->jo_set |= JO_TIMEOUT;
+		opt->jo_timeout = tv_get_number(item);
+	    }
+	    else if (STRCMP(hi->hi_key, "out_timeout") == 0)
+	    {
+		if (!(supported & JO_OUT_TIMEOUT))
+		    break;
+		opt->jo_set |= JO_OUT_TIMEOUT;
+		opt->jo_out_timeout = tv_get_number(item);
+	    }
+	    else if (STRCMP(hi->hi_key, "err_timeout") == 0)
+	    {
+		if (!(supported & JO_ERR_TIMEOUT))
+		    break;
+		opt->jo_set |= JO_ERR_TIMEOUT;
+		opt->jo_err_timeout = tv_get_number(item);
+	    }
+	    else if (STRCMP(hi->hi_key, "part") == 0)
+	    {
+		if (!(supported & JO_PART))
+		    break;
+		opt->jo_set |= JO_PART;
+		val = tv_get_string(item);
+		if (STRCMP(val, "err") == 0)
+		    opt->jo_part = PART_ERR;
+		else if (STRCMP(val, "out") == 0)
+		    opt->jo_part = PART_OUT;
+		else
+		{
+		    semsg(_(e_invargNval), "part", val);
+		    return FAIL;
+		}
+	    }
+	    else if (STRCMP(hi->hi_key, "id") == 0)
+	    {
+		if (!(supported & JO_ID))
+		    break;
+		opt->jo_set |= JO_ID;
+		opt->jo_id = tv_get_number(item);
+	    }
+	    else if (STRCMP(hi->hi_key, "stoponexit") == 0)
+	    {
+		if (!(supported & JO_STOPONEXIT))
+		    break;
+		opt->jo_set |= JO_STOPONEXIT;
+		opt->jo_stoponexit = tv_get_string_buf_chk(item,
+						      opt->jo_stoponexit_buf);
+		if (opt->jo_stoponexit == NULL)
+		{
+		    semsg(_(e_invargval), "stoponexit");
+		    return FAIL;
+		}
+	    }
+	    else if (STRCMP(hi->hi_key, "block_write") == 0)
+	    {
+		if (!(supported & JO_BLOCK_WRITE))
+		    break;
+		opt->jo_set |= JO_BLOCK_WRITE;
+		opt->jo_block_write = tv_get_number(item);
+	    }
+	    else
+		break;
+	    --todo;
+	}
+    if (todo > 0)
+    {
+	semsg(_(e_invarg2), hi->hi_key);
+	return FAIL;
+    }
+
+    return OK;
+}
+
+static job_T *first_job = NULL;
+
+    static void
+job_free_contents(job_T *job)
+{
+    int		i;
+
+    ch_log(job->jv_channel, "Freeing job");
+    if (job->jv_channel != NULL)
+    {
+	// The link from the channel to the job doesn't count as a reference,
+	// thus don't decrement the refcount of the job.  The reference from
+	// the job to the channel does count the reference, decrement it and
+	// NULL the reference.  We don't set ch_job_killed, unreferencing the
+	// job doesn't mean it stops running.
+	job->jv_channel->ch_job = NULL;
+	channel_unref(job->jv_channel);
+    }
+    mch_clear_job(job);
+
+    vim_free(job->jv_tty_in);
+    vim_free(job->jv_tty_out);
+    vim_free(job->jv_stoponexit);
+#ifdef UNIX
+    vim_free(job->jv_termsig);
+#endif
+#ifdef MSWIN
+    vim_free(job->jv_tty_type);
+#endif
+    free_callback(&job->jv_exit_cb);
+    if (job->jv_argv != NULL)
+    {
+	for (i = 0; job->jv_argv[i] != NULL; i++)
+	    vim_free(job->jv_argv[i]);
+	vim_free(job->jv_argv);
+    }
+}
+
+/*
+ * Remove "job" from the list of jobs.
+ */
+    static void
+job_unlink(job_T *job)
+{
+    if (job->jv_next != NULL)
+	job->jv_next->jv_prev = job->jv_prev;
+    if (job->jv_prev == NULL)
+	first_job = job->jv_next;
+    else
+	job->jv_prev->jv_next = job->jv_next;
+}
+
+    static void
+job_free_job(job_T *job)
+{
+    job_unlink(job);
+    vim_free(job);
+}
+
+    static void
+job_free(job_T *job)
+{
+    if (!in_free_unref_items)
+    {
+	job_free_contents(job);
+	job_free_job(job);
+    }
+}
+
+static job_T *jobs_to_free = NULL;
+
+/*
+ * Put "job" in a list to be freed later, when it's no longer referenced.
+ */
+    static void
+job_free_later(job_T *job)
+{
+    job_unlink(job);
+    job->jv_next = jobs_to_free;
+    jobs_to_free = job;
+}
+
+    static void
+free_jobs_to_free_later(void)
+{
+    job_T *job;
+
+    while (jobs_to_free != NULL)
+    {
+	job = jobs_to_free;
+	jobs_to_free = job->jv_next;
+	job_free_contents(job);
+	vim_free(job);
+    }
+}
+
+#if defined(EXITFREE) || defined(PROTO)
+    void
+job_free_all(void)
+{
+    while (first_job != NULL)
+	job_free(first_job);
+    free_jobs_to_free_later();
+
+# ifdef FEAT_TERMINAL
+    free_unused_terminals();
+# endif
+}
+#endif
+
+/*
+ * Return TRUE if we need to check if the process of "job" has ended.
+ */
+    static int
+job_need_end_check(job_T *job)
+{
+    return job->jv_status == JOB_STARTED
+	    && (job->jv_stoponexit != NULL || job->jv_exit_cb.cb_name != NULL);
+}
+
+/*
+ * Return TRUE if the channel of "job" is still useful.
+ */
+    static int
+job_channel_still_useful(job_T *job)
+{
+    return job->jv_channel != NULL && channel_still_useful(job->jv_channel);
+}
+
+/*
+ * Return TRUE if the channel of "job" is closeable.
+ */
+    static int
+job_channel_can_close(job_T *job)
+{
+    return job->jv_channel != NULL && channel_can_close(job->jv_channel);
+}
+
+/*
+ * Return TRUE if the job should not be freed yet.  Do not free the job when
+ * it has not ended yet and there is a "stoponexit" flag, an exit callback
+ * or when the associated channel will do something with the job output.
+ */
+    static int
+job_still_useful(job_T *job)
+{
+    return job_need_end_check(job) || job_channel_still_useful(job);
+}
+
+#if defined(GUI_MAY_FORK) || defined(GUI_MAY_SPAWN) || defined(PROTO)
+/*
+ * Return TRUE when there is any running job that we care about.
+ */
+    int
+job_any_running()
+{
+    job_T	*job;
+
+    FOR_ALL_JOBS(job)
+	if (job_still_useful(job))
+	{
+	    ch_log(NULL, "GUI not forking because a job is running");
+	    return TRUE;
+	}
+    return FALSE;
+}
+#endif
+
+#if !defined(USE_ARGV) || defined(PROTO)
+/*
+ * Escape one argument for an external command.
+ * Returns the escaped string in allocated memory.  NULL when out of memory.
+ */
+    static char_u *
+win32_escape_arg(char_u *arg)
+{
+    int		slen, dlen;
+    int		escaping = 0;
+    int		i;
+    char_u	*s, *d;
+    char_u	*escaped_arg;
+    int		has_spaces = FALSE;
+
+    // First count the number of extra bytes required.
+    slen = (int)STRLEN(arg);
+    dlen = slen;
+    for (s = arg; *s != NUL; MB_PTR_ADV(s))
+    {
+	if (*s == '"' || *s == '\\')
+	    ++dlen;
+	if (*s == ' ' || *s == '\t')
+	    has_spaces = TRUE;
+    }
+
+    if (has_spaces)
+	dlen += 2;
+
+    if (dlen == slen)
+	return vim_strsave(arg);
+
+    // Allocate memory for the result and fill it.
+    escaped_arg = alloc(dlen + 1);
+    if (escaped_arg == NULL)
+	return NULL;
+    memset(escaped_arg, 0, dlen+1);
+
+    d = escaped_arg;
+
+    if (has_spaces)
+	*d++ = '"';
+
+    for (s = arg; *s != NUL;)
+    {
+	switch (*s)
+	{
+	    case '"':
+		for (i = 0; i < escaping; i++)
+		    *d++ = '\\';
+		escaping = 0;
+		*d++ = '\\';
+		*d++ = *s++;
+		break;
+	    case '\\':
+		escaping++;
+		*d++ = *s++;
+		break;
+	    default:
+		escaping = 0;
+		MB_COPY_CHAR(s, d);
+		break;
+	}
+    }
+
+    // add terminating quote and finish with a NUL
+    if (has_spaces)
+    {
+	for (i = 0; i < escaping; i++)
+	    *d++ = '\\';
+	*d++ = '"';
+    }
+    *d = NUL;
+
+    return escaped_arg;
+}
+
+/*
+ * Build a command line from a list, taking care of escaping.
+ * The result is put in gap->ga_data.
+ * Returns FAIL when out of memory.
+ */
+    int
+win32_build_cmd(list_T *l, garray_T *gap)
+{
+    listitem_T  *li;
+    char_u	*s;
+
+    CHECK_LIST_MATERIALIZE(l);
+    FOR_ALL_LIST_ITEMS(l, li)
+    {
+	s = tv_get_string_chk(&li->li_tv);
+	if (s == NULL)
+	    return FAIL;
+	s = win32_escape_arg(s);
+	if (s == NULL)
+	    return FAIL;
+	ga_concat(gap, s);
+	vim_free(s);
+	if (li->li_next != NULL)
+	    ga_append(gap, ' ');
+    }
+    return OK;
+}
+#endif
+
+/*
+ * NOTE: Must call job_cleanup() only once right after the status of "job"
+ * changed to JOB_ENDED (i.e. after job_status() returned "dead" first or
+ * mch_detect_ended_job() returned non-NULL).
+ * If the job is no longer used it will be removed from the list of jobs, and
+ * deleted a bit later.
+ */
+    void
+job_cleanup(job_T *job)
+{
+    if (job->jv_status != JOB_ENDED)
+	return;
+
+    // Ready to cleanup the job.
+    job->jv_status = JOB_FINISHED;
+
+    // When only channel-in is kept open, close explicitly.
+    if (job->jv_channel != NULL)
+	ch_close_part(job->jv_channel, PART_IN);
+
+    if (job->jv_exit_cb.cb_name != NULL)
+    {
+	typval_T	argv[3];
+	typval_T	rettv;
+
+	// Invoke the exit callback. Make sure the refcount is > 0.
+	ch_log(job->jv_channel, "Invoking exit callback %s",
+						      job->jv_exit_cb.cb_name);
+	++job->jv_refcount;
+	argv[0].v_type = VAR_JOB;
+	argv[0].vval.v_job = job;
+	argv[1].v_type = VAR_NUMBER;
+	argv[1].vval.v_number = job->jv_exitval;
+	call_callback(&job->jv_exit_cb, -1, &rettv, 2, argv);
+	clear_tv(&rettv);
+	--job->jv_refcount;
+	channel_need_redraw = TRUE;
+    }
+
+    if (job->jv_channel != NULL && job->jv_channel->ch_anonymous_pipe)
+	job->jv_channel->ch_killing = TRUE;
+
+    // Do not free the job in case the close callback of the associated channel
+    // isn't invoked yet and may get information by job_info().
+    if (job->jv_refcount == 0 && !job_channel_still_useful(job))
+	// The job was already unreferenced and the associated channel was
+	// detached, now that it ended it can be freed. However, a caller might
+	// still use it, thus free it a bit later.
+	job_free_later(job);
+}
+
+/*
+ * Mark references in jobs that are still useful.
+ */
+    int
+set_ref_in_job(int copyID)
+{
+    int		abort = FALSE;
+    job_T	*job;
+    typval_T	tv;
+
+    for (job = first_job; !abort && job != NULL; job = job->jv_next)
+	if (job_still_useful(job))
+	{
+	    tv.v_type = VAR_JOB;
+	    tv.vval.v_job = job;
+	    abort = abort || set_ref_in_item(&tv, copyID, NULL, NULL);
+	}
+    return abort;
+}
+
+/*
+ * Dereference "job".  Note that after this "job" may have been freed.
+ */
+    void
+job_unref(job_T *job)
+{
+    if (job != NULL && --job->jv_refcount <= 0)
+    {
+	// Do not free the job if there is a channel where the close callback
+	// may get the job info.
+	if (!job_channel_still_useful(job))
+	{
+	    // Do not free the job when it has not ended yet and there is a
+	    // "stoponexit" flag or an exit callback.
+	    if (!job_need_end_check(job))
+	    {
+		job_free(job);
+	    }
+	    else if (job->jv_channel != NULL)
+	    {
+		// Do remove the link to the channel, otherwise it hangs
+		// around until Vim exits. See job_free() for refcount.
+		ch_log(job->jv_channel, "detaching channel from job");
+		job->jv_channel->ch_job = NULL;
+		channel_unref(job->jv_channel);
+		job->jv_channel = NULL;
+	    }
+	}
+    }
+}
+
+    int
+free_unused_jobs_contents(int copyID, int mask)
+{
+    int		did_free = FALSE;
+    job_T	*job;
+
+    FOR_ALL_JOBS(job)
+	if ((job->jv_copyID & mask) != (copyID & mask)
+						    && !job_still_useful(job))
+	{
+	    // Free the channel and ordinary items it contains, but don't
+	    // recurse into Lists, Dictionaries etc.
+	    job_free_contents(job);
+	    did_free = TRUE;
+	}
+    return did_free;
+}
+
+    void
+free_unused_jobs(int copyID, int mask)
+{
+    job_T	*job;
+    job_T	*job_next;
+
+    for (job = first_job; job != NULL; job = job_next)
+    {
+	job_next = job->jv_next;
+	if ((job->jv_copyID & mask) != (copyID & mask)
+						    && !job_still_useful(job))
+	{
+	    // Free the job struct itself.
+	    job_free_job(job);
+	}
+    }
+}
+
+/*
+ * Allocate a job.  Sets the refcount to one and sets options default.
+ */
+    job_T *
+job_alloc(void)
+{
+    job_T *job;
+
+    job = ALLOC_CLEAR_ONE(job_T);
+    if (job != NULL)
+    {
+	job->jv_refcount = 1;
+	job->jv_stoponexit = vim_strsave((char_u *)"term");
+
+	if (first_job != NULL)
+	{
+	    first_job->jv_prev = job;
+	    job->jv_next = first_job;
+	}
+	first_job = job;
+    }
+    return job;
+}
+
+    void
+job_set_options(job_T *job, jobopt_T *opt)
+{
+    if (opt->jo_set & JO_STOPONEXIT)
+    {
+	vim_free(job->jv_stoponexit);
+	if (opt->jo_stoponexit == NULL || *opt->jo_stoponexit == NUL)
+	    job->jv_stoponexit = NULL;
+	else
+	    job->jv_stoponexit = vim_strsave(opt->jo_stoponexit);
+    }
+    if (opt->jo_set & JO_EXIT_CB)
+    {
+	free_callback(&job->jv_exit_cb);
+	if (opt->jo_exit_cb.cb_name == NULL || *opt->jo_exit_cb.cb_name == NUL)
+	{
+	    job->jv_exit_cb.cb_name = NULL;
+	    job->jv_exit_cb.cb_partial = NULL;
+	}
+	else
+	    copy_callback(&job->jv_exit_cb, &opt->jo_exit_cb);
+    }
+}
+
+/*
+ * Called when Vim is exiting: kill all jobs that have the "stoponexit" flag.
+ */
+    void
+job_stop_on_exit(void)
+{
+    job_T	*job;
+
+    FOR_ALL_JOBS(job)
+	if (job->jv_status == JOB_STARTED && job->jv_stoponexit != NULL)
+	    mch_signal_job(job, job->jv_stoponexit);
+}
+
+/*
+ * Return TRUE when there is any job that has an exit callback and might exit,
+ * which means job_check_ended() should be called more often.
+ */
+    int
+has_pending_job(void)
+{
+    job_T	    *job;
+
+    FOR_ALL_JOBS(job)
+	// Only should check if the channel has been closed, if the channel is
+	// open the job won't exit.
+	if ((job->jv_status == JOB_STARTED && !job_channel_still_useful(job))
+		    || (job->jv_status == JOB_FINISHED
+					      && job_channel_can_close(job)))
+	    return TRUE;
+    return FALSE;
+}
+
+#define MAX_CHECK_ENDED 8
+
+/*
+ * Called once in a while: check if any jobs that seem useful have ended.
+ * Returns TRUE if a job did end.
+ */
+    int
+job_check_ended(void)
+{
+    int		i;
+    int		did_end = FALSE;
+
+    // be quick if there are no jobs to check
+    if (first_job == NULL)
+	return did_end;
+
+    for (i = 0; i < MAX_CHECK_ENDED; ++i)
+    {
+	// NOTE: mch_detect_ended_job() must only return a job of which the
+	// status was just set to JOB_ENDED.
+	job_T	*job = mch_detect_ended_job(first_job);
+
+	if (job == NULL)
+	    break;
+	did_end = TRUE;
+	job_cleanup(job); // may add "job" to jobs_to_free
+    }
+
+    // Actually free jobs that were cleaned up.
+    free_jobs_to_free_later();
+
+    if (channel_need_redraw)
+    {
+	channel_need_redraw = FALSE;
+	redraw_after_callback(TRUE);
+    }
+    return did_end;
+}
+
+/*
+ * Create a job and return it.  Implements job_start().
+ * "argv_arg" is only for Unix.
+ * When "argv_arg" is NULL then "argvars" is used.
+ * The returned job has a refcount of one.
+ * Returns NULL when out of memory.
+ */
+    job_T *
+job_start(
+	typval_T    *argvars,
+	char	    **argv_arg UNUSED,
+	jobopt_T    *opt_arg,
+	job_T	    **term_job)
+{
+    job_T	*job;
+    char_u	*cmd = NULL;
+    char	**argv = NULL;
+    int		argc = 0;
+    int		i;
+#if defined(UNIX)
+# define USE_ARGV
+#else
+    garray_T	ga;
+#endif
+    jobopt_T	opt;
+    ch_part_T	part;
+
+    job = job_alloc();
+    if (job == NULL)
+	return NULL;
+
+    job->jv_status = JOB_FAILED;
+#ifndef USE_ARGV
+    ga_init2(&ga, (int)sizeof(char*), 20);
+#endif
+
+    if (opt_arg != NULL)
+	opt = *opt_arg;
+    else
+    {
+	// Default mode is NL.
+	clear_job_options(&opt);
+	opt.jo_mode = MODE_NL;
+	if (get_job_options(&argvars[1], &opt,
+		    JO_MODE_ALL + JO_CB_ALL + JO_TIMEOUT_ALL + JO_STOPONEXIT
+			 + JO_EXIT_CB + JO_OUT_IO + JO_BLOCK_WRITE,
+		     JO2_ENV + JO2_CWD) == FAIL)
+	    goto theend;
+    }
+
+    // Check that when io is "file" that there is a file name.
+    for (part = PART_OUT; part < PART_COUNT; ++part)
+	if ((opt.jo_set & (JO_OUT_IO << (part - PART_OUT)))
+		&& opt.jo_io[part] == JIO_FILE
+		&& (!(opt.jo_set & (JO_OUT_NAME << (part - PART_OUT)))
+		    || *opt.jo_io_name[part] == NUL))
+	{
+	    emsg(_("E920: _io file requires _name to be set"));
+	    goto theend;
+	}
+
+    if ((opt.jo_set & JO_IN_IO) && opt.jo_io[PART_IN] == JIO_BUFFER)
+    {
+	buf_T *buf = NULL;
+
+	// check that we can find the buffer before starting the job
+	if (opt.jo_set & JO_IN_BUF)
+	{
+	    buf = buflist_findnr(opt.jo_io_buf[PART_IN]);
+	    if (buf == NULL)
+		semsg(_(e_nobufnr), (long)opt.jo_io_buf[PART_IN]);
+	}
+	else if (!(opt.jo_set & JO_IN_NAME))
+	{
+	    emsg(_("E915: in_io buffer requires in_buf or in_name to be set"));
+	}
+	else
+	    buf = buflist_find_by_name(opt.jo_io_name[PART_IN], FALSE);
+	if (buf == NULL)
+	    goto theend;
+	if (buf->b_ml.ml_mfp == NULL)
+	{
+	    char_u	numbuf[NUMBUFLEN];
+	    char_u	*s;
+
+	    if (opt.jo_set & JO_IN_BUF)
+	    {
+		sprintf((char *)numbuf, "%d", opt.jo_io_buf[PART_IN]);
+		s = numbuf;
+	    }
+	    else
+		s = opt.jo_io_name[PART_IN];
+	    semsg(_("E918: buffer must be loaded: %s"), s);
+	    goto theend;
+	}
+	job->jv_in_buf = buf;
+    }
+
+    job_set_options(job, &opt);
+
+#ifdef USE_ARGV
+    if (argv_arg != NULL)
+    {
+	// Make a copy of argv_arg for job->jv_argv.
+	for (i = 0; argv_arg[i] != NULL; i++)
+	    argc++;
+	argv = ALLOC_MULT(char *, argc + 1);
+	if (argv == NULL)
+	    goto theend;
+	for (i = 0; i < argc; i++)
+	    argv[i] = (char *)vim_strsave((char_u *)argv_arg[i]);
+	argv[argc] = NULL;
+    }
+    else
+#endif
+    if (argvars[0].v_type == VAR_STRING)
+    {
+	// Command is a string.
+	cmd = argvars[0].vval.v_string;
+	if (cmd == NULL || *skipwhite(cmd) == NUL)
+	{
+	    emsg(_(e_invarg));
+	    goto theend;
+	}
+
+	if (build_argv_from_string(cmd, &argv, &argc) == FAIL)
+	    goto theend;
+    }
+    else if (argvars[0].v_type != VAR_LIST
+	    || argvars[0].vval.v_list == NULL
+	    || argvars[0].vval.v_list->lv_len < 1)
+    {
+	emsg(_(e_invarg));
+	goto theend;
+    }
+    else
+    {
+	list_T *l = argvars[0].vval.v_list;
+
+	if (build_argv_from_list(l, &argv, &argc) == FAIL)
+	    goto theend;
+
+	// Empty command is invalid.
+	if (argc == 0 || *skipwhite((char_u *)argv[0]) == NUL)
+	{
+	    emsg(_(e_invarg));
+	    goto theend;
+	}
+#ifndef USE_ARGV
+	if (win32_build_cmd(l, &ga) == FAIL)
+	    goto theend;
+	cmd = ga.ga_data;
+	if (cmd == NULL || *skipwhite(cmd) == NUL)
+	{
+	    emsg(_(e_invarg));
+	    goto theend;
+	}
+#endif
+    }
+
+    // Save the command used to start the job.
+    job->jv_argv = argv;
+
+    if (term_job != NULL)
+	*term_job = job;
+
+#ifdef USE_ARGV
+    if (ch_log_active())
+    {
+	garray_T    ga;
+
+	ga_init2(&ga, (int)sizeof(char), 200);
+	for (i = 0; i < argc; ++i)
+	{
+	    if (i > 0)
+		ga_concat(&ga, (char_u *)"  ");
+	    ga_concat(&ga, (char_u *)argv[i]);
+	}
+	ga_append(&ga, NUL);
+	ch_log(NULL, "Starting job: %s", (char *)ga.ga_data);
+	ga_clear(&ga);
+    }
+    mch_job_start(argv, job, &opt, term_job != NULL);
+#else
+    ch_log(NULL, "Starting job: %s", (char *)cmd);
+    mch_job_start((char *)cmd, job, &opt);
+#endif
+
+    // If the channel is reading from a buffer, write lines now.
+    if (job->jv_channel != NULL)
+	channel_write_in(job->jv_channel);
+
+theend:
+#ifndef USE_ARGV
+    vim_free(ga.ga_data);
+#endif
+    if (argv != NULL && argv != job->jv_argv)
+    {
+	for (i = 0; argv[i] != NULL; i++)
+	    vim_free(argv[i]);
+	vim_free(argv);
+    }
+    free_job_options(&opt);
+    return job;
+}
+
+/*
+ * Get the status of "job" and invoke the exit callback when needed.
+ * The returned string is not allocated.
+ */
+    char *
+job_status(job_T *job)
+{
+    char	*result;
+
+    if (job->jv_status >= JOB_ENDED)
+	// No need to check, dead is dead.
+	result = "dead";
+    else if (job->jv_status == JOB_FAILED)
+	result = "fail";
+    else
+    {
+	result = mch_job_status(job);
+	if (job->jv_status == JOB_ENDED)
+	    job_cleanup(job);
+    }
+    return result;
+}
+
+/*
+ * Send a signal to "job".  Implements job_stop().
+ * When "type" is not NULL use this for the type.
+ * Otherwise use argvars[1] for the type.
+ */
+    int
+job_stop(job_T *job, typval_T *argvars, char *type)
+{
+    char_u *arg;
+
+    if (type != NULL)
+	arg = (char_u *)type;
+    else if (argvars[1].v_type == VAR_UNKNOWN)
+	arg = (char_u *)"";
+    else
+    {
+	arg = tv_get_string_chk(&argvars[1]);
+	if (arg == NULL)
+	{
+	    emsg(_(e_invarg));
+	    return 0;
+	}
+    }
+    if (job->jv_status == JOB_FAILED)
+    {
+	ch_log(job->jv_channel, "Job failed to start, job_stop() skipped");
+	return 0;
+    }
+    if (job->jv_status == JOB_ENDED)
+    {
+	ch_log(job->jv_channel, "Job has already ended, job_stop() skipped");
+	return 0;
+    }
+    ch_log(job->jv_channel, "Stopping job with '%s'", (char *)arg);
+    if (mch_signal_job(job, arg) == FAIL)
+	return 0;
+
+    // Assume that only "kill" will kill the job.
+    if (job->jv_channel != NULL && STRCMP(arg, "kill") == 0)
+	job->jv_channel->ch_job_killed = TRUE;
+
+    // We don't try freeing the job, obviously the caller still has a
+    // reference to it.
+    return 1;
+}
+
+    void
+invoke_prompt_callback(void)
+{
+    typval_T	rettv;
+    typval_T	argv[2];
+    char_u	*text;
+    char_u	*prompt;
+    linenr_T	lnum = curbuf->b_ml.ml_line_count;
+
+    // Add a new line for the prompt before invoking the callback, so that
+    // text can always be inserted above the last line.
+    ml_append(lnum, (char_u  *)"", 0, FALSE);
+    curwin->w_cursor.lnum = lnum + 1;
+    curwin->w_cursor.col = 0;
+
+    if (curbuf->b_prompt_callback.cb_name == NULL
+	    || *curbuf->b_prompt_callback.cb_name == NUL)
+	return;
+    text = ml_get(lnum);
+    prompt = prompt_text();
+    if (STRLEN(text) >= STRLEN(prompt))
+	text += STRLEN(prompt);
+    argv[0].v_type = VAR_STRING;
+    argv[0].vval.v_string = vim_strsave(text);
+    argv[1].v_type = VAR_UNKNOWN;
+
+    call_callback(&curbuf->b_prompt_callback, -1, &rettv, 1, argv);
+    clear_tv(&argv[0]);
+    clear_tv(&rettv);
+}
+
+/*
+ * Return TRUE when the interrupt callback was invoked.
+ */
+    int
+invoke_prompt_interrupt(void)
+{
+    typval_T	rettv;
+    typval_T	argv[1];
+
+    if (curbuf->b_prompt_interrupt.cb_name == NULL
+	    || *curbuf->b_prompt_interrupt.cb_name == NUL)
+	return FALSE;
+    argv[0].v_type = VAR_UNKNOWN;
+
+    got_int = FALSE; // don't skip executing commands
+    call_callback(&curbuf->b_prompt_interrupt, -1, &rettv, 0, argv);
+    clear_tv(&rettv);
+    return TRUE;
+}
+
+/*
+ * Return the effective prompt for the specified buffer.
+ */
+    char_u *
+buf_prompt_text(buf_T* buf)
+{
+    if (buf->b_prompt_text == NULL)
+	return (char_u *)"% ";
+    return buf->b_prompt_text;
+}
+
+/*
+ * Return the effective prompt for the current buffer.
+ */
+    char_u *
+prompt_text(void)
+{
+    return buf_prompt_text(curbuf);
+}
+
+
+/*
+ * Prepare for prompt mode: Make sure the last line has the prompt text.
+ * Move the cursor to this line.
+ */
+    void
+init_prompt(int cmdchar_todo)
+{
+    char_u *prompt = prompt_text();
+    char_u *text;
+
+    curwin->w_cursor.lnum = curbuf->b_ml.ml_line_count;
+    text = ml_get_curline();
+    if (STRNCMP(text, prompt, STRLEN(prompt)) != 0)
+    {
+	// prompt is missing, insert it or append a line with it
+	if (*text == NUL)
+	    ml_replace(curbuf->b_ml.ml_line_count, prompt, TRUE);
+	else
+	    ml_append(curbuf->b_ml.ml_line_count, prompt, 0, FALSE);
+	curwin->w_cursor.lnum = curbuf->b_ml.ml_line_count;
+	coladvance((colnr_T)MAXCOL);
+	changed_bytes(curbuf->b_ml.ml_line_count, 0);
+    }
+
+    // Insert always starts after the prompt, allow editing text after it.
+    if (Insstart_orig.lnum != curwin->w_cursor.lnum
+				   || Insstart_orig.col != (int)STRLEN(prompt))
+	set_insstart(curwin->w_cursor.lnum, (int)STRLEN(prompt));
+
+    if (cmdchar_todo == 'A')
+	coladvance((colnr_T)MAXCOL);
+    if (cmdchar_todo == 'I' || curwin->w_cursor.col <= (int)STRLEN(prompt))
+	curwin->w_cursor.col = (int)STRLEN(prompt);
+    // Make sure the cursor is in a valid position.
+    check_cursor();
+}
+
+/*
+ * Return TRUE if the cursor is in the editable position of the prompt line.
+ */
+    int
+prompt_curpos_editable()
+{
+    return curwin->w_cursor.lnum == curbuf->b_ml.ml_line_count
+	&& curwin->w_cursor.col >= (int)STRLEN(prompt_text());
+}
+
+/*
+ * "prompt_setcallback({buffer}, {callback})" function
+ */
+    void
+f_prompt_setcallback(typval_T *argvars, typval_T *rettv UNUSED)
+{
+    buf_T	*buf;
+    callback_T	callback;
+
+    if (check_secure())
+	return;
+    buf = tv_get_buf(&argvars[0], FALSE);
+    if (buf == NULL)
+	return;
+
+    callback = get_callback(&argvars[1]);
+    if (callback.cb_name == NULL)
+	return;
+
+    free_callback(&buf->b_prompt_callback);
+    set_callback(&buf->b_prompt_callback, &callback);
+}
+
+/*
+ * "prompt_setinterrupt({buffer}, {callback})" function
+ */
+    void
+f_prompt_setinterrupt(typval_T *argvars, typval_T *rettv UNUSED)
+{
+    buf_T	*buf;
+    callback_T	callback;
+
+    if (check_secure())
+	return;
+    buf = tv_get_buf(&argvars[0], FALSE);
+    if (buf == NULL)
+	return;
+
+    callback = get_callback(&argvars[1]);
+    if (callback.cb_name == NULL)
+	return;
+
+    free_callback(&buf->b_prompt_interrupt);
+    set_callback(&buf->b_prompt_interrupt, &callback);
+}
+
+
+/*
+ * "prompt_getprompt({buffer})" function
+ */
+    void
+f_prompt_getprompt(typval_T *argvars, typval_T *rettv)
+{
+    buf_T	*buf;
+
+    // return an empty string by default, e.g. it's not a prompt buffer
+    rettv->v_type = VAR_STRING;
+    rettv->vval.v_string = NULL;
+
+    buf = tv_get_buf_from_arg(&argvars[0]);
+    if (buf == NULL)
+	return;
+
+    if (!bt_prompt(buf))
+	return;
+
+    rettv->vval.v_string = vim_strsave(buf_prompt_text(buf));
+}
+
+/*
+ * "prompt_setprompt({buffer}, {text})" function
+ */
+    void
+f_prompt_setprompt(typval_T *argvars, typval_T *rettv UNUSED)
+{
+    buf_T	*buf;
+    char_u	*text;
+
+    if (check_secure())
+	return;
+    buf = tv_get_buf(&argvars[0], FALSE);
+    if (buf == NULL)
+	return;
+
+    text = tv_get_string(&argvars[1]);
+    vim_free(buf->b_prompt_text);
+    buf->b_prompt_text = vim_strsave(text);
+}
+
+/*
+ * Get the job from the argument.
+ * Returns NULL if the job is invalid.
+ */
+    static job_T *
+get_job_arg(typval_T *tv)
+{
+    job_T *job;
+
+    if (tv->v_type != VAR_JOB)
+    {
+	semsg(_(e_invarg2), tv_get_string(tv));
+	return NULL;
+    }
+    job = tv->vval.v_job;
+
+    if (job == NULL)
+	emsg(_("E916: not a valid job"));
+    return job;
+}
+
+/*
+ * "job_getchannel()" function
+ */
+    void
+f_job_getchannel(typval_T *argvars, typval_T *rettv)
+{
+    job_T	*job = get_job_arg(&argvars[0]);
+
+    if (job != NULL)
+    {
+	rettv->v_type = VAR_CHANNEL;
+	rettv->vval.v_channel = job->jv_channel;
+	if (job->jv_channel != NULL)
+	    ++job->jv_channel->ch_refcount;
+    }
+}
+
+/*
+ * Implementation of job_info().
+ */
+    static void
+job_info(job_T *job, dict_T *dict)
+{
+    dictitem_T	*item;
+    varnumber_T	nr;
+    list_T	*l;
+    int		i;
+
+    dict_add_string(dict, "status", (char_u *)job_status(job));
+
+    item = dictitem_alloc((char_u *)"channel");
+    if (item == NULL)
+	return;
+    item->di_tv.v_type = VAR_CHANNEL;
+    item->di_tv.vval.v_channel = job->jv_channel;
+    if (job->jv_channel != NULL)
+	++job->jv_channel->ch_refcount;
+    if (dict_add(dict, item) == FAIL)
+	dictitem_free(item);
+
+#ifdef UNIX
+    nr = job->jv_pid;
+#else
+    nr = job->jv_proc_info.dwProcessId;
+#endif
+    dict_add_number(dict, "process", nr);
+    dict_add_string(dict, "tty_in", job->jv_tty_in);
+    dict_add_string(dict, "tty_out", job->jv_tty_out);
+
+    dict_add_number(dict, "exitval", job->jv_exitval);
+    dict_add_string(dict, "exit_cb", job->jv_exit_cb.cb_name);
+    dict_add_string(dict, "stoponexit", job->jv_stoponexit);
+#ifdef UNIX
+    dict_add_string(dict, "termsig", job->jv_termsig);
+#endif
+#ifdef MSWIN
+    dict_add_string(dict, "tty_type", job->jv_tty_type);
+#endif
+
+    l = list_alloc();
+    if (l != NULL)
+    {
+	dict_add_list(dict, "cmd", l);
+	if (job->jv_argv != NULL)
+	    for (i = 0; job->jv_argv[i] != NULL; i++)
+		list_append_string(l, (char_u *)job->jv_argv[i], -1);
+    }
+}
+
+/*
+ * Implementation of job_info() to return info for all jobs.
+ */
+    static void
+job_info_all(list_T *l)
+{
+    job_T	*job;
+    typval_T	tv;
+
+    FOR_ALL_JOBS(job)
+    {
+	tv.v_type = VAR_JOB;
+	tv.vval.v_job = job;
+
+	if (list_append_tv(l, &tv) != OK)
+	    return;
+    }
+}
+
+/*
+ * "job_info()" function
+ */
+    void
+f_job_info(typval_T *argvars, typval_T *rettv)
+{
+    if (argvars[0].v_type != VAR_UNKNOWN)
+    {
+	job_T	*job = get_job_arg(&argvars[0]);
+
+	if (job != NULL && rettv_dict_alloc(rettv) != FAIL)
+	    job_info(job, rettv->vval.v_dict);
+    }
+    else if (rettv_list_alloc(rettv) == OK)
+	job_info_all(rettv->vval.v_list);
+}
+
+/*
+ * "job_setoptions()" function
+ */
+    void
+f_job_setoptions(typval_T *argvars, typval_T *rettv UNUSED)
+{
+    job_T	*job = get_job_arg(&argvars[0]);
+    jobopt_T	opt;
+
+    if (job == NULL)
+	return;
+    clear_job_options(&opt);
+    if (get_job_options(&argvars[1], &opt, JO_STOPONEXIT + JO_EXIT_CB, 0) == OK)
+	job_set_options(job, &opt);
+    free_job_options(&opt);
+}
+
+/*
+ * "job_start()" function
+ */
+    void
+f_job_start(typval_T *argvars, typval_T *rettv)
+{
+    rettv->v_type = VAR_JOB;
+    if (check_restricted() || check_secure())
+	return;
+    rettv->vval.v_job = job_start(argvars, NULL, NULL, NULL);
+}
+
+/*
+ * "job_status()" function
+ */
+    void
+f_job_status(typval_T *argvars, typval_T *rettv)
+{
+    job_T	*job = get_job_arg(&argvars[0]);
+
+    if (job != NULL)
+    {
+	rettv->v_type = VAR_STRING;
+	rettv->vval.v_string = vim_strsave((char_u *)job_status(job));
+    }
+}
+
+/*
+ * "job_stop()" function
+ */
+    void
+f_job_stop(typval_T *argvars, typval_T *rettv)
+{
+    job_T	*job = get_job_arg(&argvars[0]);
+
+    if (job != NULL)
+	rettv->vval.v_number = job_stop(job, argvars, NULL);
+}
+
+#endif // FEAT_JOB_CHANNEL