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cmd-parse.y
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/* $OpenBSD$ */
/*
* Copyright (c) 2019 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 <pwd.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <wchar.h>
#include "tmux.h"
static int yylex(void);
static int yyparse(void);
static int printflike(1,2) yyerror(const char *, ...);
static char *yylex_token(int);
static char *yylex_format(void);
struct cmd_parse_scope {
int flag;
TAILQ_ENTRY (cmd_parse_scope) entry;
};
enum cmd_parse_argument_type {
CMD_PARSE_STRING,
CMD_PARSE_COMMANDS,
CMD_PARSE_PARSED_COMMANDS
};
struct cmd_parse_argument {
enum cmd_parse_argument_type type;
char *string;
struct cmd_parse_commands *commands;
struct cmd_list *cmdlist;
TAILQ_ENTRY(cmd_parse_argument) entry;
};
TAILQ_HEAD(cmd_parse_arguments, cmd_parse_argument);
struct cmd_parse_command {
u_int line;
struct cmd_parse_arguments arguments;
TAILQ_ENTRY(cmd_parse_command) entry;
};
TAILQ_HEAD(cmd_parse_commands, cmd_parse_command);
struct cmd_parse_state {
FILE *f;
const char *buf;
size_t len;
size_t off;
int condition;
int eol;
int eof;
struct cmd_parse_input *input;
u_int escapes;
char *error;
struct cmd_parse_commands *commands;
struct cmd_parse_scope *scope;
TAILQ_HEAD(, cmd_parse_scope) stack;
};
static struct cmd_parse_state parse_state;
static char *cmd_parse_get_error(const char *, u_int, const char *);
static void cmd_parse_free_command(struct cmd_parse_command *);
static struct cmd_parse_commands *cmd_parse_new_commands(void);
static void cmd_parse_free_commands(struct cmd_parse_commands *);
static void cmd_parse_build_commands(struct cmd_parse_commands *,
struct cmd_parse_input *, struct cmd_parse_result *);
static void cmd_parse_print_commands(struct cmd_parse_input *,
struct cmd_list *);
%}
%union
{
char *token;
struct cmd_parse_arguments *arguments;
struct cmd_parse_argument *argument;
int flag;
struct {
int flag;
struct cmd_parse_commands *commands;
} elif;
struct cmd_parse_commands *commands;
struct cmd_parse_command *command;
}
%token ERROR
%token HIDDEN
%token IF
%token ELSE
%token ELIF
%token ENDIF
%token <token> FORMAT TOKEN EQUALS
%type <token> expanded format
%type <arguments> arguments
%type <argument> argument
%type <flag> if_open if_elif
%type <elif> elif elif1
%type <commands> argument_statements statements statement
%type <commands> commands condition condition1
%type <command> command
%%
lines : /* empty */
| statements
{
struct cmd_parse_state *ps = &parse_state;
ps->commands = $1;
}
statements : statement '\n'
{
$$ = $1;
}
| statements statement '\n'
{
$$ = $1;
TAILQ_CONCAT($$, $2, entry);
free($2);
}
statement : /* empty */
{
$$ = xmalloc (sizeof *$$);
TAILQ_INIT($$);
}
| hidden_assignment
{
$$ = xmalloc (sizeof *$$);
TAILQ_INIT($$);
}
| condition
{
struct cmd_parse_state *ps = &parse_state;
if (ps->scope == NULL || ps->scope->flag)
$$ = $1;
else {
$$ = cmd_parse_new_commands();
cmd_parse_free_commands($1);
}
}
| commands
{
struct cmd_parse_state *ps = &parse_state;
if (ps->scope == NULL || ps->scope->flag)
$$ = $1;
else {
$$ = cmd_parse_new_commands();
cmd_parse_free_commands($1);
}
}
format : FORMAT
{
$$ = $1;
}
| TOKEN
{
$$ = $1;
}
expanded : format
{
struct cmd_parse_state *ps = &parse_state;
struct cmd_parse_input *pi = ps->input;
struct format_tree *ft;
struct client *c = pi->c;
struct cmd_find_state *fsp;
struct cmd_find_state fs;
int flags = FORMAT_NOJOBS;
if (cmd_find_valid_state(&pi->fs))
fsp = &pi->fs;
else {
cmd_find_from_client(&fs, c, 0);
fsp = &fs;
}
ft = format_create(NULL, pi->item, FORMAT_NONE, flags);
format_defaults(ft, c, fsp->s, fsp->wl, fsp->wp);
$$ = format_expand(ft, $1);
format_free(ft);
free($1);
}
optional_assignment : /* empty */
| assignment
assignment : EQUALS
{
struct cmd_parse_state *ps = &parse_state;
int flags = ps->input->flags;
int flag = 1;
struct cmd_parse_scope *scope;
if (ps->scope != NULL) {
flag = ps->scope->flag;
TAILQ_FOREACH(scope, &ps->stack, entry)
flag = flag && scope->flag;
}
if ((~flags & CMD_PARSE_PARSEONLY) && flag)
environ_put(global_environ, $1, 0);
free($1);
}
hidden_assignment : HIDDEN EQUALS
{
struct cmd_parse_state *ps = &parse_state;
int flags = ps->input->flags;
int flag = 1;
struct cmd_parse_scope *scope;
if (ps->scope != NULL) {
flag = ps->scope->flag;
TAILQ_FOREACH(scope, &ps->stack, entry)
flag = flag && scope->flag;
}
if ((~flags & CMD_PARSE_PARSEONLY) && flag)
environ_put(global_environ, $2, ENVIRON_HIDDEN);
free($2);
}
if_open : IF expanded
{
struct cmd_parse_state *ps = &parse_state;
struct cmd_parse_scope *scope;
scope = xmalloc(sizeof *scope);
$$ = scope->flag = format_true($2);
free($2);
if (ps->scope != NULL)
TAILQ_INSERT_HEAD(&ps->stack, ps->scope, entry);
ps->scope = scope;
}
if_else : ELSE
{
struct cmd_parse_state *ps = &parse_state;
struct cmd_parse_scope *scope;
scope = xmalloc(sizeof *scope);
scope->flag = !ps->scope->flag;
free(ps->scope);
ps->scope = scope;
}
if_elif : ELIF expanded
{
struct cmd_parse_state *ps = &parse_state;
struct cmd_parse_scope *scope;
scope = xmalloc(sizeof *scope);
$$ = scope->flag = format_true($2);
free($2);
free(ps->scope);
ps->scope = scope;
}
if_close : ENDIF
{
struct cmd_parse_state *ps = &parse_state;
free(ps->scope);
ps->scope = TAILQ_FIRST(&ps->stack);
if (ps->scope != NULL)
TAILQ_REMOVE(&ps->stack, ps->scope, entry);
}
condition : if_open '\n' statements if_close
{
if ($1)
$$ = $3;
else {
$$ = cmd_parse_new_commands();
cmd_parse_free_commands($3);
}
}
| if_open '\n' statements if_else '\n' statements if_close
{
if ($1) {
$$ = $3;
cmd_parse_free_commands($6);
} else {
$$ = $6;
cmd_parse_free_commands($3);
}
}
| if_open '\n' statements elif if_close
{
if ($1) {
$$ = $3;
cmd_parse_free_commands($4.commands);
} else if ($4.flag) {
$$ = $4.commands;
cmd_parse_free_commands($3);
} else {
$$ = cmd_parse_new_commands();
cmd_parse_free_commands($3);
cmd_parse_free_commands($4.commands);
}
}
| if_open '\n' statements elif if_else '\n' statements if_close
{
if ($1) {
$$ = $3;
cmd_parse_free_commands($4.commands);
cmd_parse_free_commands($7);
} else if ($4.flag) {
$$ = $4.commands;
cmd_parse_free_commands($3);
cmd_parse_free_commands($7);
} else {
$$ = $7;
cmd_parse_free_commands($3);
cmd_parse_free_commands($4.commands);
}
}
elif : if_elif '\n' statements
{
if ($1) {
$$.flag = 1;
$$.commands = $3;
} else {
$$.flag = 0;
$$.commands = cmd_parse_new_commands();
cmd_parse_free_commands($3);
}
}
| if_elif '\n' statements elif
{
if ($1) {
$$.flag = 1;
$$.commands = $3;
cmd_parse_free_commands($4.commands);
} else if ($4.flag) {
$$.flag = 1;
$$.commands = $4.commands;
cmd_parse_free_commands($3);
} else {
$$.flag = 0;
$$.commands = cmd_parse_new_commands();
cmd_parse_free_commands($3);
cmd_parse_free_commands($4.commands);
}
}
commands : command
{
struct cmd_parse_state *ps = &parse_state;
$$ = cmd_parse_new_commands();
if (!TAILQ_EMPTY(&$1->arguments) &&
(ps->scope == NULL || ps->scope->flag))
TAILQ_INSERT_TAIL($$, $1, entry);
else
cmd_parse_free_command($1);
}
| commands ';'
{
$$ = $1;
}
| commands ';' condition1
{
$$ = $1;
TAILQ_CONCAT($$, $3, entry);
free($3);
}
| commands ';' command
{
struct cmd_parse_state *ps = &parse_state;
if (!TAILQ_EMPTY(&$3->arguments) &&
(ps->scope == NULL || ps->scope->flag)) {
$$ = $1;
TAILQ_INSERT_TAIL($$, $3, entry);
} else {
$$ = cmd_parse_new_commands();
cmd_parse_free_commands($1);
cmd_parse_free_command($3);
}
}
| condition1
{
$$ = $1;
}
command : assignment
{
struct cmd_parse_state *ps = &parse_state;
$$ = xcalloc(1, sizeof *$$);
$$->line = ps->input->line;
TAILQ_INIT(&$$->arguments);
}
| optional_assignment TOKEN
{
struct cmd_parse_state *ps = &parse_state;
struct cmd_parse_argument *arg;
$$ = xcalloc(1, sizeof *$$);
$$->line = ps->input->line;
TAILQ_INIT(&$$->arguments);
arg = xcalloc(1, sizeof *arg);
arg->type = CMD_PARSE_STRING;
arg->string = $2;
TAILQ_INSERT_HEAD(&$$->arguments, arg, entry);
}
| optional_assignment TOKEN arguments
{
struct cmd_parse_state *ps = &parse_state;
struct cmd_parse_argument *arg;
$$ = xcalloc(1, sizeof *$$);
$$->line = ps->input->line;
TAILQ_INIT(&$$->arguments);
TAILQ_CONCAT(&$$->arguments, $3, entry);
free($3);
arg = xcalloc(1, sizeof *arg);
arg->type = CMD_PARSE_STRING;
arg->string = $2;
TAILQ_INSERT_HEAD(&$$->arguments, arg, entry);
}
condition1 : if_open commands if_close
{
if ($1)
$$ = $2;
else {
$$ = cmd_parse_new_commands();
cmd_parse_free_commands($2);
}
}
| if_open commands if_else commands if_close
{
if ($1) {
$$ = $2;
cmd_parse_free_commands($4);
} else {
$$ = $4;
cmd_parse_free_commands($2);
}
}
| if_open commands elif1 if_close
{
if ($1) {
$$ = $2;
cmd_parse_free_commands($3.commands);
} else if ($3.flag) {
$$ = $3.commands;
cmd_parse_free_commands($2);
} else {
$$ = cmd_parse_new_commands();
cmd_parse_free_commands($2);
cmd_parse_free_commands($3.commands);
}
}
| if_open commands elif1 if_else commands if_close
{
if ($1) {
$$ = $2;
cmd_parse_free_commands($3.commands);
cmd_parse_free_commands($5);
} else if ($3.flag) {
$$ = $3.commands;
cmd_parse_free_commands($2);
cmd_parse_free_commands($5);
} else {
$$ = $5;
cmd_parse_free_commands($2);
cmd_parse_free_commands($3.commands);
}
}
elif1 : if_elif commands
{
if ($1) {
$$.flag = 1;
$$.commands = $2;
} else {
$$.flag = 0;
$$.commands = cmd_parse_new_commands();
cmd_parse_free_commands($2);
}
}
| if_elif commands elif1
{
if ($1) {
$$.flag = 1;
$$.commands = $2;
cmd_parse_free_commands($3.commands);
} else if ($3.flag) {
$$.flag = 1;
$$.commands = $3.commands;
cmd_parse_free_commands($2);
} else {
$$.flag = 0;
$$.commands = cmd_parse_new_commands();
cmd_parse_free_commands($2);
cmd_parse_free_commands($3.commands);
}
}
arguments : argument
{
$$ = xcalloc(1, sizeof *$$);
TAILQ_INIT($$);
TAILQ_INSERT_HEAD($$, $1, entry);
}
| argument arguments
{
TAILQ_INSERT_HEAD($2, $1, entry);
$$ = $2;
}
argument : TOKEN
{
$$ = xcalloc(1, sizeof *$$);
$$->type = CMD_PARSE_STRING;
$$->string = $1;
}
| EQUALS
{
$$ = xcalloc(1, sizeof *$$);
$$->type = CMD_PARSE_STRING;
$$->string = $1;
}
| '{' argument_statements
{
$$ = xcalloc(1, sizeof *$$);
$$->type = CMD_PARSE_COMMANDS;
$$->commands = $2;
}
argument_statements : statement '}'
{
$$ = $1;
}
| statements statement '}'
{
$$ = $1;
TAILQ_CONCAT($$, $2, entry);
free($2);
}
%%
static char *
cmd_parse_get_error(const char *file, u_int line, const char *error)
{
char *s;
if (file == NULL)
s = xstrdup(error);
else
xasprintf(&s, "%s:%u: %s", file, line, error);
return (s);
}
static void
cmd_parse_print_commands(struct cmd_parse_input *pi, struct cmd_list *cmdlist)
{
char *s;
if (pi->item == NULL || (~pi->flags & CMD_PARSE_VERBOSE))
return;
s = cmd_list_print(cmdlist, 0);
if (pi->file != NULL)
cmdq_print(pi->item, "%s:%u: %s", pi->file, pi->line, s);
else
cmdq_print(pi->item, "%u: %s", pi->line, s);
free(s);
}
static void
cmd_parse_free_argument(struct cmd_parse_argument *arg)
{
switch (arg->type) {
case CMD_PARSE_STRING:
free(arg->string);
break;
case CMD_PARSE_COMMANDS:
cmd_parse_free_commands(arg->commands);
break;
case CMD_PARSE_PARSED_COMMANDS:
cmd_list_free(arg->cmdlist);
break;
}
free(arg);
}
static void
cmd_parse_free_arguments(struct cmd_parse_arguments *args)
{
struct cmd_parse_argument *arg, *arg1;
TAILQ_FOREACH_SAFE(arg, args, entry, arg1) {
TAILQ_REMOVE(args, arg, entry);
cmd_parse_free_argument(arg);
}
}
static void
cmd_parse_free_command(struct cmd_parse_command *cmd)
{
cmd_parse_free_arguments(&cmd->arguments);
free(cmd);
}
static struct cmd_parse_commands *
cmd_parse_new_commands(void)
{
struct cmd_parse_commands *cmds;
cmds = xmalloc(sizeof *cmds);
TAILQ_INIT(cmds);
return (cmds);
}
static void
cmd_parse_free_commands(struct cmd_parse_commands *cmds)
{
struct cmd_parse_command *cmd, *cmd1;
TAILQ_FOREACH_SAFE(cmd, cmds, entry, cmd1) {
TAILQ_REMOVE(cmds, cmd, entry);
cmd_parse_free_command(cmd);
}
free(cmds);
}
static struct cmd_parse_commands *
cmd_parse_run_parser(char **cause)
{
struct cmd_parse_state *ps = &parse_state;
struct cmd_parse_scope *scope, *scope1;
int retval;
ps->commands = NULL;
TAILQ_INIT(&ps->stack);
retval = yyparse();
TAILQ_FOREACH_SAFE(scope, &ps->stack, entry, scope1) {
TAILQ_REMOVE(&ps->stack, scope, entry);
free(scope);
}
if (retval != 0) {
*cause = ps->error;
return (NULL);
}
if (ps->commands == NULL)
return (cmd_parse_new_commands());
return (ps->commands);
}
static struct cmd_parse_commands *
cmd_parse_do_file(FILE *f, struct cmd_parse_input *pi, char **cause)
{
struct cmd_parse_state *ps = &parse_state;
memset(ps, 0, sizeof *ps);
ps->input = pi;
ps->f = f;
return (cmd_parse_run_parser(cause));
}
static struct cmd_parse_commands *
cmd_parse_do_buffer(const char *buf, size_t len, struct cmd_parse_input *pi,
char **cause)
{
struct cmd_parse_state *ps = &parse_state;
memset(ps, 0, sizeof *ps);
ps->input = pi;
ps->buf = buf;
ps->len = len;
return (cmd_parse_run_parser(cause));
}
static void
cmd_parse_log_commands(struct cmd_parse_commands *cmds, const char *prefix)
{
struct cmd_parse_command *cmd;
struct cmd_parse_argument *arg;
u_int i, j;
char *s;
i = 0;
TAILQ_FOREACH(cmd, cmds, entry) {
j = 0;
TAILQ_FOREACH(arg, &cmd->arguments, entry) {
switch (arg->type) {
case CMD_PARSE_STRING:
log_debug("%s %u:%u: %s", prefix, i, j,
arg->string);
break;
case CMD_PARSE_COMMANDS:
xasprintf(&s, "%s %u:%u", prefix, i, j);
cmd_parse_log_commands(arg->commands, s);
free(s);
break;
case CMD_PARSE_PARSED_COMMANDS:
s = cmd_list_print(arg->cmdlist, 0);
log_debug("%s %u:%u: %s", prefix, i, j, s);
free(s);
break;
}
j++;
}
i++;
}
}
static int
cmd_parse_expand_alias(struct cmd_parse_command *cmd,
struct cmd_parse_input *pi, struct cmd_parse_result *pr)
{
struct cmd_parse_argument *arg, *arg1, *first;
struct cmd_parse_commands *cmds;
struct cmd_parse_command *last;
char *alias, *name, *cause;
if (pi->flags & CMD_PARSE_NOALIAS)
return (0);
memset(pr, 0, sizeof *pr);
first = TAILQ_FIRST(&cmd->arguments);
if (first == NULL || first->type != CMD_PARSE_STRING) {
pr->status = CMD_PARSE_SUCCESS;
pr->cmdlist = cmd_list_new();
return (1);
}
name = first->string;
alias = cmd_get_alias(name);
if (alias == NULL)
return (0);
log_debug("%s: %u alias %s = %s", __func__, pi->line, name, alias);
cmds = cmd_parse_do_buffer(alias, strlen(alias), pi, &cause);
free(alias);
if (cmds == NULL) {
pr->status = CMD_PARSE_ERROR;
pr->error = cause;
return (1);
}
last = TAILQ_LAST(cmds, cmd_parse_commands);
if (last == NULL) {
pr->status = CMD_PARSE_SUCCESS;
pr->cmdlist = cmd_list_new();
return (1);
}
TAILQ_REMOVE(&cmd->arguments, first, entry);
cmd_parse_free_argument(first);
TAILQ_FOREACH_SAFE(arg, &cmd->arguments, entry, arg1) {
TAILQ_REMOVE(&cmd->arguments, arg, entry);
TAILQ_INSERT_TAIL(&last->arguments, arg, entry);
}
cmd_parse_log_commands(cmds, __func__);
pi->flags |= CMD_PARSE_NOALIAS;
cmd_parse_build_commands(cmds, pi, pr);
pi->flags &= ~CMD_PARSE_NOALIAS;
return (1);
}
static void
cmd_parse_build_command(struct cmd_parse_command *cmd,
struct cmd_parse_input *pi, struct cmd_parse_result *pr)
{
struct cmd_parse_argument *arg;
struct cmd *add;
char *cause;
struct args_value *values = NULL;
u_int count = 0, idx;
memset(pr, 0, sizeof *pr);
if (cmd_parse_expand_alias(cmd, pi, pr))
return;
TAILQ_FOREACH(arg, &cmd->arguments, entry) {
values = xrecallocarray(values, count, count + 1,
sizeof *values);
switch (arg->type) {
case CMD_PARSE_STRING:
values[count].type = ARGS_STRING;
values[count].string = xstrdup(arg->string);
break;
case CMD_PARSE_COMMANDS:
cmd_parse_build_commands(arg->commands, pi, pr);
if (pr->status != CMD_PARSE_SUCCESS)
goto out;
values[count].type = ARGS_COMMANDS;
values[count].cmdlist = pr->cmdlist;
break;
case CMD_PARSE_PARSED_COMMANDS:
values[count].type = ARGS_COMMANDS;
values[count].cmdlist = arg->cmdlist;
values[count].cmdlist->references++;
break;
}
count++;
}
add = cmd_parse(values, count, pi->file, pi->line, &cause);
if (add == NULL) {
pr->status = CMD_PARSE_ERROR;
pr->error = cmd_parse_get_error(pi->file, pi->line, cause);
free(cause);
goto out;
}
pr->status = CMD_PARSE_SUCCESS;
pr->cmdlist = cmd_list_new();
cmd_list_append(pr->cmdlist, add);
out:
for (idx = 0; idx < count; idx++)
args_free_value(&values[idx]);
free(values);
}
static void
cmd_parse_build_commands(struct cmd_parse_commands *cmds,
struct cmd_parse_input *pi, struct cmd_parse_result *pr)
{
struct cmd_parse_command *cmd;
u_int line = UINT_MAX;
struct cmd_list *current = NULL, *result;
char *s;
memset(pr, 0, sizeof *pr);
/* Check for an empty list. */
if (TAILQ_EMPTY(cmds)) {
pr->status = CMD_PARSE_SUCCESS;
pr->cmdlist = cmd_list_new();
return;
}
cmd_parse_log_commands(cmds, __func__);
/*
* Parse each command into a command list. Create a new command list
* for each line (unless the flag is set) so they get a new group (so
* the queue knows which ones to remove if a command fails when
* executed).
*/
result = cmd_list_new();
TAILQ_FOREACH(cmd, cmds, entry) {
if (((~pi->flags & CMD_PARSE_ONEGROUP) && cmd->line != line)) {
if (current != NULL) {
cmd_parse_print_commands(pi, current);
cmd_list_move(result, current);
cmd_list_free(current);
}
current = cmd_list_new();
}
if (current == NULL)
current = cmd_list_new();
line = pi->line = cmd->line;
cmd_parse_build_command(cmd, pi, pr);
if (pr->status != CMD_PARSE_SUCCESS) {
cmd_list_free(result);
cmd_list_free(current);
return;
}
cmd_list_append_all(current, pr->cmdlist);
cmd_list_free(pr->cmdlist);
}
if (current != NULL) {
cmd_parse_print_commands(pi, current);
cmd_list_move(result, current);
cmd_list_free(current);
}
s = cmd_list_print(result, 0);
log_debug("%s: %s", __func__, s);
free(s);
pr->status = CMD_PARSE_SUCCESS;
pr->cmdlist = result;
}
struct cmd_parse_result *
cmd_parse_from_file(FILE *f, struct cmd_parse_input *pi)
{
static struct cmd_parse_result pr;
struct cmd_parse_input input;
struct cmd_parse_commands *cmds;
char *cause;
if (pi == NULL) {
memset(&input, 0, sizeof input);
pi = &input;
}
memset(&pr, 0, sizeof pr);
cmds = cmd_parse_do_file(f, pi, &cause);
if (cmds == NULL) {
pr.status = CMD_PARSE_ERROR;
pr.error = cause;
return (&pr);
}
cmd_parse_build_commands(cmds, pi, &pr);
cmd_parse_free_commands(cmds);
return (&pr);
}
struct cmd_parse_result *
cmd_parse_from_string(const char *s, struct cmd_parse_input *pi)
{
struct cmd_parse_input input;
if (pi == NULL) {
memset(&input, 0, sizeof input);
pi = &input;
}
/*
* When parsing a string, put commands in one group even if there are
* multiple lines. This means { a \n b } is identical to "a ; b" when
* given as an argument to another command.
*/
pi->flags |= CMD_PARSE_ONEGROUP;
return (cmd_parse_from_buffer(s, strlen(s), pi));
}
enum cmd_parse_status
cmd_parse_and_insert(const char *s, struct cmd_parse_input *pi,
struct cmdq_item *after, struct cmdq_state *state, char **error)
{
struct cmd_parse_result *pr;
struct cmdq_item *item;
pr = cmd_parse_from_string(s, pi);
switch (pr->status) {
case CMD_PARSE_ERROR:
if (error != NULL)
*error = pr->error;
else
free(pr->error);
break;
case CMD_PARSE_SUCCESS:
item = cmdq_get_command(pr->cmdlist, state);
cmdq_insert_after(after, item);
cmd_list_free(pr->cmdlist);
break;
}
return (pr->status);
}
enum cmd_parse_status