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Merge branch 'obsd-master'

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This commit is contained in:
Thomas Adam
2017-10-06 20:01:17 +01:00
parent 2be01ab4ec 9c4caf49a2
commit f069c0ba09
2 changed files with 164 additions and 33 deletions
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172
cfg.c
View File

@@ -26,6 +26,17 @@
#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);
static char *cfg_file;
int cfg_finished;
static char **cfg_causes;
@@ -101,6 +112,124 @@ start_cfg(void)
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)
{
@@ -108,11 +237,13 @@ load_cfg(const char *path, struct client *c, struct cmdq_item *item, int quiet)
const char delim[3] = { '\\', '\\', '\0' };
u_int found = 0;
size_t line = 0;
char *buf, *cause1, *p, *q, *s;
char *buf, *cause1, *p, *q;
struct cmd_list *cmdlist;
struct cmdq_item *new_item;
int condition = 0;
struct format_tree *ft;
struct cfg_cond *cond, *cond1;
struct cfg_conds conds;
TAILQ_INIT(&conds);
log_debug("loading %s", path);
if ((f = fopen(path, "rb")) == NULL) {
@@ -136,33 +267,12 @@ load_cfg(const char *path, struct client *c, struct cmdq_item *item, int quiet)
while (q != p && isspace((u_char)*q))
*q-- = '\0';
if (condition != 0 && strcmp(p, "%endif") == 0) {
condition = 0;
if (*p == '%') {
cfg_handle_directive(p, path, line, &conds);
continue;
}
if (strncmp(p, "%if ", 4) == 0) {
if (condition != 0) {
cfg_add_cause("%s:%zu: nested %%if", path,
line);
continue;
}
ft = format_create(NULL, NULL, FORMAT_NONE,
FORMAT_NOJOBS);
s = p + 3;
while (isspace((u_char)*s))
s++;
s = format_expand(ft, s);
if (*s != '\0' && (s[0] != '0' || s[1] != '\0'))
condition = 1;
else
condition = -1;
free(s);
format_free(ft);
continue;
}
if (condition == -1)
cond = TAILQ_FIRST(&conds);
if (cond != NULL && !cond->met)
continue;
cmdlist = cmd_string_parse(p, path, line, &cause1);
@@ -189,6 +299,12 @@ load_cfg(const char *path, struct client *c, struct cmdq_item *item, int quiet)
}
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);
}

25
tmux.1
View File

@@ -980,22 +980,37 @@ them with
and
.Em %endif
lines.
Additional
.Em %elif
and
.Em %else
lines may also be used.
The argument to
.Em %if
is expanded as a format and if it evaluates to false
(zero or empty), subsequent lines are ignored until
and
.Em %elif
is expanded as a format and if it evaluates to false (zero or empty),
subsequent lines are ignored until the next
.Em %elif ,
.Em %else
or
.Em %endif .
For example:
.Bd -literal -offset indent
%if #{==:#{host},myhost}
set -g status-style bg=red
%elif #{==:#{host},myotherhost}
set -g status-style bg=green
%else
set -g status-style bg=blue
%endif
.Ed
.Pp
Will change the status line to red if running on
.Ql myhost .
.Em %if
may not be nested.
.Ql myhost ,
green if running on
.Ql myotherhost ,
or blue if running on another host.
.It Ic start-server
.D1 (alias: Ic start )
Start the