cfg.c - tmux - Rivoreo Source Code Repositories

 /* $OpenBSD$ */

 /*
  * Copyright (c) 2008 Nicholas Marriott <nicholas.marriott@gmail.com>
  *
  * Permission to use, copy, modify, and distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above
  * copyright notice and this permission notice appear in all copies.
  *
  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
  * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
  * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */

 #include <sys/types.h>

 #include <ctype.h>
 #include <errno.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>

 #include "tmux.h"

 /* Condition for %if, %elif, %else and %endif. */
 struct cfg_cond {
 	size_t			line;		/* line number of %if */
 	int			met;		/* condition was met */
 	int			skip;		/* skip later %elif/%else */
 	int			saw_else;	/* saw a %else */

 	TAILQ_ENTRY(cfg_cond)	entry;
 };
 TAILQ_HEAD(cfg_conds, cfg_cond);

 struct client		 *cfg_client;
 static char		 *cfg_file;
 int			  cfg_finished;
 static char		**cfg_causes;
 static u_int		  cfg_ncauses;
 static struct cmdq_item	 *cfg_item;

 static enum cmd_retval
 cfg_client_done(__unused struct cmdq_item *item, __unused void *data)
 {
 	if (!cfg_finished)
 		return (CMD_RETURN_WAIT);
 	return (CMD_RETURN_NORMAL);
 }

 static enum cmd_retval
 cfg_done(__unused struct cmdq_item *item, __unused void *data)
 {
 	if (cfg_finished)
 		return (CMD_RETURN_NORMAL);
 	cfg_finished = 1;

 	if (!RB_EMPTY(&sessions))
 		cfg_show_causes(RB_MIN(sessions, &sessions));

 	if (cfg_item != NULL)
 		cfg_item->flags &= ~CMDQ_WAITING;

 	status_prompt_load_history();

 	return (CMD_RETURN_NORMAL);
 }

 void
 set_cfg_file(const char *path)
 {
 	free(cfg_file);
 	cfg_file = xstrdup(path);
 }

 void
 start_cfg(void)
 {
 	const char	*home;
 	int		 quiet = 0;
 	struct client	*c;

 	/*
 	 * Configuration files are loaded without a client, so NULL is passed
 	 * into load_cfg() and commands run in the global queue with
 	 * item->client NULL.
 	 *
 	 * However, we must block the initial client (but just the initial
 	 * client) so that its command runs after the configuration is loaded.
 	 * Because start_cfg() is called so early, we can be sure the client's
 	 * command queue is currently empty and our callback will be at the
 	 * front - we need to get in before MSG_COMMAND.
 	 */
 	cfg_client = c = TAILQ_FIRST(&clients);
 	if (c != NULL) {
 		cfg_item = cmdq_get_callback(cfg_client_done, NULL);
 		cmdq_append(c, cfg_item);
 	}

 	if (cfg_file == NULL)
 		load_cfg(TMUX_CONF, NULL, NULL, 1);

 	if (cfg_file == NULL && (home = find_home()) != NULL) {
 		xasprintf(&cfg_file, "%s/.tmux.conf", home);
 		quiet = 1;
 	}
 	if (cfg_file != NULL)
 		load_cfg(cfg_file, NULL, NULL, quiet);

 	cmdq_append(NULL, cmdq_get_callback(cfg_done, NULL));
 }

 static int
 cfg_check_cond(const char *path, size_t line, const char *p, int *skip,
     struct client *c, struct cmd_find_state *fs)
 {
 	struct format_tree	*ft;
 	char			*s;
 	int			 result;

 	while (isspace((u_char)*p))
 		p++;
 	if (p[0] == '\0') {
 		cfg_add_cause("%s:%zu: invalid condition", path, line);
 		*skip = 1;
 		return (0);
 	}

 	ft = format_create(NULL, NULL, FORMAT_NONE, FORMAT_NOJOBS);
 	if (fs != NULL)
 		format_defaults(ft, c, fs->s, fs->wl, fs->wp);
 	else
 		format_defaults(ft, c, NULL, NULL, NULL);
 	s = format_expand(ft, p);
 	result = format_true(s);
 	free(s);
 	format_free(ft);

 	*skip = result;
 	return (result);
 }

 static void
 cfg_handle_if(const char *path, size_t line, struct cfg_conds *conds,
     const char *p, struct client *c, struct cmd_find_state *fs)
 {
 	struct cfg_cond	*cond;
 	struct cfg_cond	*parent = TAILQ_FIRST(conds);

 	/*
 	 * Add a new condition. If a previous condition exists and isn't
 	 * currently met, this new one also can't be met.
 	 */
 	cond = xcalloc(1, sizeof *cond);
 	cond->line = line;
 	if (parent == NULL || parent->met)
 		cond->met = cfg_check_cond(path, line, p, &cond->skip, c, fs);
 	else
 		cond->skip = 1;
 	cond->saw_else = 0;
 	TAILQ_INSERT_HEAD(conds, cond, entry);
 }

 static void
 cfg_handle_elif(const char *path, size_t line, struct cfg_conds *conds,
     const char *p, struct client *c, struct cmd_find_state *fs)
 {
 	struct cfg_cond	*cond = TAILQ_FIRST(conds);

 	/*
 	 * If a previous condition exists and wasn't met, check this
 	 * one instead and change the state.
 	 */
 	if (cond == NULL || cond->saw_else)
 		cfg_add_cause("%s:%zu: unexpected %%elif", path, line);
 	else if (!cond->skip)
 		cond->met = cfg_check_cond(path, line, p, &cond->skip, c, fs);
 	else
 		cond->met = 0;
 }

 static void
 cfg_handle_else(const char *path, size_t line, struct cfg_conds *conds)
 {
 	struct cfg_cond	*cond = TAILQ_FIRST(conds);

 	/*
 	 * If a previous condition exists and wasn't met and wasn't already
 	 * %else, use this one instead.
 	 */
 	if (cond == NULL || cond->saw_else) {
 		cfg_add_cause("%s:%zu: unexpected %%else", path, line);
 		return;
 	}
 	cond->saw_else = 1;
 	cond->met = !cond->skip;
 	cond->skip = 1;
 }

 static void
 cfg_handle_endif(const char *path, size_t line, struct cfg_conds *conds)
 {
 	struct cfg_cond	*cond = TAILQ_FIRST(conds);

 	/*
 	 * Remove previous condition if one exists.
 	 */
 	if (cond == NULL) {
 		cfg_add_cause("%s:%zu: unexpected %%endif", path, line);
 		return;
 	}
 	TAILQ_REMOVE(conds, cond, entry);
 	free(cond);
 }

 static void
 cfg_handle_directive(const char *p, const char *path, size_t line,
     struct cfg_conds *conds, struct client *c, struct cmd_find_state *fs)
 {
 	int	n = 0;

 	while (p[n] != '\0' && !isspace((u_char)p[n]))
 		n++;
 	if (strncmp(p, "%if", n) == 0)
 		cfg_handle_if(path, line, conds, p + n, c, fs);
 	else if (strncmp(p, "%elif", n) == 0)
 		cfg_handle_elif(path, line, conds, p + n, c, fs);
 	else if (strcmp(p, "%else") == 0)
 		cfg_handle_else(path, line, conds);
 	else if (strcmp(p, "%endif") == 0)
 		cfg_handle_endif(path, line, conds);
 	else
 		cfg_add_cause("%s:%zu: invalid directive: %s", path, line, p);
 }

 int
 load_cfg(const char *path, struct client *c, struct cmdq_item *item, int quiet)
 {
 	FILE			*f;
 	const char		 delim[3] = { '\\', '\\', '\0' };
 	u_int			 found = 0;
 	size_t			 line = 0;
 	char			*buf, *cause1, *p, *q;
 	struct cmd_list		*cmdlist;
 	struct cmdq_item	*new_item;
 	struct cfg_cond		*cond, *cond1;
 	struct cfg_conds	 conds;
 	struct cmd_find_state	*fs = NULL;
 	struct client		*fc = NULL;

 	if (item != NULL) {
 		fs = &item->target;
 		fc = cmd_find_client(item, NULL, 1);
 	}

 	TAILQ_INIT(&conds);

 	log_debug("loading %s", path);
 	if ((f = fopen(path, "rb")) == NULL) {
 		if (errno == ENOENT && quiet)
 			return (0);
 		cfg_add_cause("%s: %s", path, strerror(errno));
 		return (-1);
 	}

 	while ((buf = fparseln(f, NULL, &line, delim, 0)) != NULL) {
 		log_debug("%s: %s", path, buf);

 		p = buf;
 		while (isspace((u_char)*p))
 			p++;
 		if (*p == '\0') {
 			free(buf);
 			continue;
 		}
 		q = p + strlen(p) - 1;
 		while (q != p && isspace((u_char)*q))
 			*q-- = '\0';

 		if (*p == '%') {
 			cfg_handle_directive(p, path, line, &conds, fc, fs);
 			continue;
 		}
 		cond = TAILQ_FIRST(&conds);
 		if (cond != NULL && !cond->met)
 			continue;

 		cmdlist = cmd_string_parse(p, path, line, &cause1);
 		if (cmdlist == NULL) {
 			free(buf);
 			if (cause1 == NULL)
 				continue;
 			cfg_add_cause("%s:%zu: %s", path, line, cause1);
 			free(cause1);
 			continue;
 		}
 		free(buf);

 		new_item = cmdq_get_command(cmdlist, NULL, NULL, 0);
 		if (item != NULL)
 			cmdq_insert_after(item, new_item);
 		else
 			cmdq_append(c, new_item);
 		cmd_list_free(cmdlist);

 		found++;
 	}
 	fclose(f);

 	TAILQ_FOREACH_REVERSE_SAFE(cond, &conds, cfg_conds, entry, cond1) {
 		cfg_add_cause("%s:%zu: unterminated %%if", path, cond->line);
 		TAILQ_REMOVE(&conds, cond, entry);
 		free(cond);
 	}

 	return (found);
 }

 void
 cfg_add_cause(const char *fmt, ...)
 {
 	va_list	 ap;
 	char	*msg;

 	va_start(ap, fmt);
 	xvasprintf(&msg, fmt, ap);
 	va_end(ap);

 	cfg_ncauses++;
 	cfg_causes = xreallocarray(cfg_causes, cfg_ncauses, sizeof *cfg_causes);
 	cfg_causes[cfg_ncauses - 1] = msg;
 }

 void
 cfg_print_causes(struct cmdq_item *item)
 {
 	u_int	 i;

 	for (i = 0; i < cfg_ncauses; i++) {
 		cmdq_print(item, "%s", cfg_causes[i]);
 		free(cfg_causes[i]);
 	}

 	free(cfg_causes);
 	cfg_causes = NULL;
 	cfg_ncauses = 0;
 }

 void
 cfg_show_causes(struct session *s)
 {
 	struct window_pane		*wp;
 	struct window_mode_entry	*wme;
 	u_int				 i;

 	if (s == NULL || cfg_ncauses == 0)
 		return;
 	wp = s->curw->window->active;

 	wme = TAILQ_FIRST(&wp->modes);
 	if (wme == NULL || wme->mode != &window_view_mode)
 		window_pane_set_mode(wp, &window_view_mode, NULL, NULL);
 	for (i = 0; i < cfg_ncauses; i++) {
 		window_copy_add(wp, "%s", cfg_causes[i]);
 		free(cfg_causes[i]);
 	}

 	free(cfg_causes);
 	cfg_causes = NULL;
 	cfg_ncauses = 0;
 }
	/* $OpenBSD$ */

	/*
	* Copyright (c) 2008 Nicholas Marriott <nicholas.marriott@gmail.com>
	*
	* Permission to use, copy, modify, and distribute this software for any
	* purpose with or without fee is hereby granted, provided that the above
	* copyright notice and this permission notice appear in all copies.
	*
	* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
	* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
	* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
	* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
	* WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
	* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
	* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
	*/

	#include <sys/types.h>

	#include <ctype.h>
	#include <errno.h>
	#include <stdio.h>
	#include <stdlib.h>
	#include <string.h>

	#include "tmux.h"

	/* Condition for %if, %elif, %else and %endif. */
	struct cfg_cond {
	size_t line; /* line number of %if */
	int met; /* condition was met */
	int skip; /* skip later %elif/%else */
	int saw_else; /* saw a %else */

	TAILQ_ENTRY(cfg_cond) entry;
	};
	TAILQ_HEAD(cfg_conds, cfg_cond);

	struct client *cfg_client;
	static char *cfg_file;
	int cfg_finished;
	static char **cfg_causes;
	static u_int cfg_ncauses;
	static struct cmdq_item *cfg_item;

	static enum cmd_retval
	cfg_client_done(__unused struct cmdq_item item, __unused void data)
	{
	if (!cfg_finished)
	return (CMD_RETURN_WAIT);
	return (CMD_RETURN_NORMAL);
	}

	static enum cmd_retval
	cfg_done(__unused struct cmdq_item item, __unused void data)
	{
	if (cfg_finished)
	return (CMD_RETURN_NORMAL);
	cfg_finished = 1;

	if (!RB_EMPTY(&sessions))
	cfg_show_causes(RB_MIN(sessions, &sessions));

	if (cfg_item != NULL)
	cfg_item->flags &= ~CMDQ_WAITING;

	status_prompt_load_history();

	return (CMD_RETURN_NORMAL);
	}

	void
	set_cfg_file(const char *path)
	{
	free(cfg_file);
	cfg_file = xstrdup(path);
	}

	void
	start_cfg(void)
	{
	const char *home;
	int quiet = 0;
	struct client *c;

	/*
	* Configuration files are loaded without a client, so NULL is passed
	* into load_cfg() and commands run in the global queue with
	* item->client NULL.
	*
	* However, we must block the initial client (but just the initial
	* client) so that its command runs after the configuration is loaded.
	* Because start_cfg() is called so early, we can be sure the client's
	* command queue is currently empty and our callback will be at the
	* front - we need to get in before MSG_COMMAND.
	*/
	cfg_client = c = TAILQ_FIRST(&clients);
	if (c != NULL) {
	cfg_item = cmdq_get_callback(cfg_client_done, NULL);
	cmdq_append(c, cfg_item);
	}

	if (cfg_file == NULL)
	load_cfg(TMUX_CONF, NULL, NULL, 1);

	if (cfg_file == NULL && (home = find_home()) != NULL) {
	xasprintf(&cfg_file, "%s/.tmux.conf", home);
	quiet = 1;
	}
	if (cfg_file != NULL)
	load_cfg(cfg_file, NULL, NULL, quiet);

	cmdq_append(NULL, cmdq_get_callback(cfg_done, NULL));
	}

	static int
	cfg_check_cond(const char path, size_t line, const char p, int *skip,
	struct client c, struct cmd_find_state fs)
	{
	struct format_tree *ft;
	char *s;
	int result;

	while (isspace((u_char)*p))
	p++;
	if (p[0] == '\0') {
	cfg_add_cause("%s:%zu: invalid condition", path, line);
	*skip = 1;
	return (0);
	}

	ft = format_create(NULL, NULL, FORMAT_NONE, FORMAT_NOJOBS);
	if (fs != NULL)
	format_defaults(ft, c, fs->s, fs->wl, fs->wp);
	else
	format_defaults(ft, c, NULL, NULL, NULL);
	s = format_expand(ft, p);
	result = format_true(s);
	free(s);
	format_free(ft);

	*skip = result;
	return (result);
	}

	static void
	cfg_handle_if(const char path, size_t line, struct cfg_conds conds,
	const char p, struct client c, struct cmd_find_state *fs)
	{
	struct cfg_cond *cond;
	struct cfg_cond *parent = TAILQ_FIRST(conds);

	/*
	* Add a new condition. If a previous condition exists and isn't
	* currently met, this new one also can't be met.
	*/
	cond = xcalloc(1, sizeof *cond);
	cond->line = line;
	if (parent == NULL \|\| parent->met)
	cond->met = cfg_check_cond(path, line, p, &cond->skip, c, fs);
	else
	cond->skip = 1;
	cond->saw_else = 0;
	TAILQ_INSERT_HEAD(conds, cond, entry);
	}

	static void
	cfg_handle_elif(const char path, size_t line, struct cfg_conds conds,
	const char p, struct client c, struct cmd_find_state *fs)
	{
	struct cfg_cond *cond = TAILQ_FIRST(conds);

	/*
	* If a previous condition exists and wasn't met, check this
	* one instead and change the state.
	*/
	if (cond == NULL \|\| cond->saw_else)
	cfg_add_cause("%s:%zu: unexpected %%elif", path, line);
	else if (!cond->skip)
	cond->met = cfg_check_cond(path, line, p, &cond->skip, c, fs);
	else
	cond->met = 0;
	}

	static void
	cfg_handle_else(const char path, size_t line, struct cfg_conds conds)
	{
	struct cfg_cond *cond = TAILQ_FIRST(conds);

	/*
	* If a previous condition exists and wasn't met and wasn't already
	* %else, use this one instead.
	*/
	if (cond == NULL \|\| cond->saw_else) {
	cfg_add_cause("%s:%zu: unexpected %%else", path, line);
	return;
	}
	cond->saw_else = 1;
	cond->met = !cond->skip;
	cond->skip = 1;
	}

	static void
	cfg_handle_endif(const char path, size_t line, struct cfg_conds conds)
	{
	struct cfg_cond *cond = TAILQ_FIRST(conds);

	/*
	* Remove previous condition if one exists.
	*/
	if (cond == NULL) {
	cfg_add_cause("%s:%zu: unexpected %%endif", path, line);
	return;
	}
	TAILQ_REMOVE(conds, cond, entry);
	free(cond);
	}

	static void
	cfg_handle_directive(const char p, const char path, size_t line,
	struct cfg_conds conds, struct client c, struct cmd_find_state *fs)
	{
	int n = 0;

	while (p[n] != '\0' && !isspace((u_char)p[n]))
	n++;
	if (strncmp(p, "%if", n) == 0)
	cfg_handle_if(path, line, conds, p + n, c, fs);
	else if (strncmp(p, "%elif", n) == 0)
	cfg_handle_elif(path, line, conds, p + n, c, fs);
	else if (strcmp(p, "%else") == 0)
	cfg_handle_else(path, line, conds);
	else if (strcmp(p, "%endif") == 0)
	cfg_handle_endif(path, line, conds);
	else
	cfg_add_cause("%s:%zu: invalid directive: %s", path, line, p);
	}

	int
	load_cfg(const char path, struct client c, struct cmdq_item *item, int quiet)
	{
	FILE *f;
	const char delim[3] = { '\\', '\\', '\0' };
	u_int found = 0;
	size_t line = 0;
	char buf, cause1, p, q;
	struct cmd_list *cmdlist;
	struct cmdq_item *new_item;
	struct cfg_cond cond, cond1;
	struct cfg_conds conds;
	struct cmd_find_state *fs = NULL;
	struct client *fc = NULL;

	if (item != NULL) {
	fs = &item->target;
	fc = cmd_find_client(item, NULL, 1);
	}

	TAILQ_INIT(&conds);

	log_debug("loading %s", path);
	if ((f = fopen(path, "rb")) == NULL) {
	if (errno == ENOENT && quiet)
	return (0);
	cfg_add_cause("%s: %s", path, strerror(errno));
	return (-1);
	}

	while ((buf = fparseln(f, NULL, &line, delim, 0)) != NULL) {
	log_debug("%s: %s", path, buf);

	p = buf;
	while (isspace((u_char)*p))
	p++;
	if (*p == '\0') {
	free(buf);
	continue;
	}
	q = p + strlen(p) - 1;
	while (q != p && isspace((u_char)*q))
	*q-- = '\0';

	if (*p == '%') {
	cfg_handle_directive(p, path, line, &conds, fc, fs);
	continue;
	}
	cond = TAILQ_FIRST(&conds);
	if (cond != NULL && !cond->met)
	continue;

	cmdlist = cmd_string_parse(p, path, line, &cause1);
	if (cmdlist == NULL) {
	free(buf);
	if (cause1 == NULL)
	continue;
	cfg_add_cause("%s:%zu: %s", path, line, cause1);
	free(cause1);
	continue;
	}
	free(buf);

	new_item = cmdq_get_command(cmdlist, NULL, NULL, 0);
	if (item != NULL)
	cmdq_insert_after(item, new_item);
	else
	cmdq_append(c, new_item);
	cmd_list_free(cmdlist);

	found++;
	}
	fclose(f);

	TAILQ_FOREACH_REVERSE_SAFE(cond, &conds, cfg_conds, entry, cond1) {
	cfg_add_cause("%s:%zu: unterminated %%if", path, cond->line);
	TAILQ_REMOVE(&conds, cond, entry);
	free(cond);
	}

	return (found);
	}

	void
	cfg_add_cause(const char *fmt, ...)
	{
	va_list ap;
	char *msg;

	va_start(ap, fmt);
	xvasprintf(&msg, fmt, ap);
	va_end(ap);

	cfg_ncauses++;
	cfg_causes = xreallocarray(cfg_causes, cfg_ncauses, sizeof *cfg_causes);
	cfg_causes[cfg_ncauses - 1] = msg;
	}

	void
	cfg_print_causes(struct cmdq_item *item)
	{
	u_int i;

	for (i = 0; i < cfg_ncauses; i++) {
	cmdq_print(item, "%s", cfg_causes[i]);
	free(cfg_causes[i]);
	}

	free(cfg_causes);
	cfg_causes = NULL;
	cfg_ncauses = 0;
	}

	void
	cfg_show_causes(struct session *s)
	{
	struct window_pane *wp;
	struct window_mode_entry *wme;
	u_int i;

	if (s == NULL \|\| cfg_ncauses == 0)
	return;
	wp = s->curw->window->active;

	wme = TAILQ_FIRST(&wp->modes);
	if (wme == NULL \|\| wme->mode != &window_view_mode)
	window_pane_set_mode(wp, &window_view_mode, NULL, NULL);
	for (i = 0; i < cfg_ncauses; i++) {
	window_copy_add(wp, "%s", cfg_causes[i]);
	free(cfg_causes[i]);
	}

	free(cfg_causes);
	cfg_causes = NULL;
	cfg_ncauses = 0;
	}