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/* $OpenBSD$ */
/*
* 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 <util.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);
}
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_condition(const char *path, size_t line, const char *p, int *skip)
{
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);
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 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_condition(path, line, p, &cond->skip);
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 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_condition(path, line, p, &cond->skip);
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)
{
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);
else if (strncmp(p, "%elif", n) == 0)
cfg_handle_elif(path, line, conds, p + n);
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;
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') {
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