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i-bash/pcomplete.c
Chet Ramey 2b76266c88 Bash-4.3 patch 10
2014-04-11 11:05:05 -04:00

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/* pcomplete.c - functions to generate lists of matches for programmable completion. */
/* Copyright (C) 1999-2012 Free Software Foundation, Inc.
This file is part of GNU Bash, the Bourne Again SHell.
Bash is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
Bash is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with Bash. If not, see <http://www.gnu.org/licenses/>.
*/
#include <config.h>
#if defined (PROGRAMMABLE_COMPLETION)
#include "bashtypes.h"
#include "posixstat.h"
#if defined (HAVE_UNISTD_H)
# include <unistd.h>
#endif
#include <signal.h>
#if defined (PREFER_STDARG)
# include <stdarg.h>
#else
# include <varargs.h>
#endif
#include <sys/time.h>
#include <stdio.h>
#include "bashansi.h"
#include "bashintl.h"
#include "shell.h"
#include "pcomplete.h"
#include "alias.h"
#include "bashline.h"
#include "execute_cmd.h"
#include "pathexp.h"
#if defined (JOB_CONTROL)
# include "jobs.h"
#endif
#if !defined (NSIG)
# include "trap.h"
#endif
#include "shmbutil.h"
#include "builtins.h"
#include "builtins/common.h"
#include "builtins/builtext.h"
#include <glob/glob.h>
#include <glob/strmatch.h>
#include <readline/rlconf.h>
#include <readline/readline.h>
#include <readline/history.h>
#define PCOMP_RETRYFAIL 256
#ifdef STRDUP
# undef STRDUP
#endif
#define STRDUP(x) ((x) ? savestring (x) : (char *)NULL)
typedef SHELL_VAR **SVFUNC ();
#ifndef HAVE_STRPBRK
extern char *strpbrk __P((char *, char *));
#endif
extern int array_needs_making;
extern STRING_INT_ALIST word_token_alist[];
extern char *signal_names[];
extern sh_builtin_func_t *last_shell_builtin, *this_shell_builtin;
#if defined (DEBUG)
#if defined (PREFER_STDARG)
static void debug_printf (const char *, ...) __attribute__((__format__ (printf, 1, 2)));
#endif
#endif /* DEBUG */
static int it_init_joblist __P((ITEMLIST *, int));
static int it_init_aliases __P((ITEMLIST *));
static int it_init_arrayvars __P((ITEMLIST *));
static int it_init_bindings __P((ITEMLIST *));
static int it_init_builtins __P((ITEMLIST *));
static int it_init_disabled __P((ITEMLIST *));
static int it_init_enabled __P((ITEMLIST *));
static int it_init_exported __P((ITEMLIST *));
static int it_init_functions __P((ITEMLIST *));
static int it_init_helptopics __P((ITEMLIST *));
static int it_init_hostnames __P((ITEMLIST *));
static int it_init_jobs __P((ITEMLIST *));
static int it_init_running __P((ITEMLIST *));
static int it_init_stopped __P((ITEMLIST *));
static int it_init_keywords __P((ITEMLIST *));
static int it_init_signals __P((ITEMLIST *));
static int it_init_variables __P((ITEMLIST *));
static int it_init_setopts __P((ITEMLIST *));
static int it_init_shopts __P((ITEMLIST *));
static int shouldexp_filterpat __P((char *));
static char *preproc_filterpat __P((char *, char *));
static void init_itemlist_from_varlist __P((ITEMLIST *, SVFUNC *));
static STRINGLIST *gen_matches_from_itemlist __P((ITEMLIST *, const char *));
static STRINGLIST *gen_action_completions __P((COMPSPEC *, const char *));
static STRINGLIST *gen_globpat_matches __P((COMPSPEC *, const char *));
static STRINGLIST *gen_wordlist_matches __P((COMPSPEC *, const char *));
static STRINGLIST *gen_shell_function_matches __P((COMPSPEC *, const char *,
const char *,
char *, int, WORD_LIST *,
int, int, int *));
static STRINGLIST *gen_command_matches __P((COMPSPEC *, const char *,
const char *,
char *, int, WORD_LIST *,
int, int));
static STRINGLIST *gen_progcomp_completions __P((const char *, const char *,
const char *,
int, int, int *, int *,
COMPSPEC **));
static char *pcomp_filename_completion_function __P((const char *, int));
#if defined (ARRAY_VARS)
static SHELL_VAR *bind_comp_words __P((WORD_LIST *));
#endif
static void bind_compfunc_variables __P((char *, int, WORD_LIST *, int, int));
static void unbind_compfunc_variables __P((int));
static WORD_LIST *build_arg_list __P((char *, const char *, const char *, WORD_LIST *, int));
static WORD_LIST *command_line_to_word_list __P((char *, int, int, int *, int *));
#ifdef DEBUG
static int progcomp_debug = 0;
#endif
int prog_completion_enabled = 1;
/* These are used to manage the arrays of strings for possible completions. */
ITEMLIST it_aliases = { 0, it_init_aliases, (STRINGLIST *)0 };
ITEMLIST it_arrayvars = { LIST_DYNAMIC, it_init_arrayvars, (STRINGLIST *)0 };
ITEMLIST it_bindings = { 0, it_init_bindings, (STRINGLIST *)0 };
ITEMLIST it_builtins = { 0, it_init_builtins, (STRINGLIST *)0 };
ITEMLIST it_commands = { LIST_DYNAMIC }; /* unused */
ITEMLIST it_directories = { LIST_DYNAMIC }; /* unused */
ITEMLIST it_disabled = { 0, it_init_disabled, (STRINGLIST *)0 };
ITEMLIST it_enabled = { 0, it_init_enabled, (STRINGLIST *)0 };
ITEMLIST it_exports = { LIST_DYNAMIC, it_init_exported, (STRINGLIST *)0 };
ITEMLIST it_files = { LIST_DYNAMIC }; /* unused */
ITEMLIST it_functions = { 0, it_init_functions, (STRINGLIST *)0 };
ITEMLIST it_helptopics = { 0, it_init_helptopics, (STRINGLIST *)0 };
ITEMLIST it_hostnames = { LIST_DYNAMIC, it_init_hostnames, (STRINGLIST *)0 };
ITEMLIST it_groups = { LIST_DYNAMIC }; /* unused */
ITEMLIST it_jobs = { LIST_DYNAMIC, it_init_jobs, (STRINGLIST *)0 };
ITEMLIST it_keywords = { 0, it_init_keywords, (STRINGLIST *)0 };
ITEMLIST it_running = { LIST_DYNAMIC, it_init_running, (STRINGLIST *)0 };
ITEMLIST it_services = { LIST_DYNAMIC }; /* unused */
ITEMLIST it_setopts = { 0, it_init_setopts, (STRINGLIST *)0 };
ITEMLIST it_shopts = { 0, it_init_shopts, (STRINGLIST *)0 };
ITEMLIST it_signals = { 0, it_init_signals, (STRINGLIST *)0 };
ITEMLIST it_stopped = { LIST_DYNAMIC, it_init_stopped, (STRINGLIST *)0 };
ITEMLIST it_users = { LIST_DYNAMIC }; /* unused */
ITEMLIST it_variables = { LIST_DYNAMIC, it_init_variables, (STRINGLIST *)0 };
COMPSPEC *pcomp_curcs;
const char *pcomp_curcmd;
const char *pcomp_curtxt;
#ifdef DEBUG
/* Debugging code */
static void
#if defined (PREFER_STDARG)
debug_printf (const char *format, ...)
#else
debug_printf (format, va_alist)
const char *format;
va_dcl
#endif
{
va_list args;
if (progcomp_debug == 0)
return;
SH_VA_START (args, format);
fprintf (stdout, "DEBUG: ");
vfprintf (stdout, format, args);
fprintf (stdout, "\n");
rl_on_new_line ();
va_end (args);
}
#endif
/* Functions to manage the item lists */
void
set_itemlist_dirty (it)
ITEMLIST *it;
{
it->flags |= LIST_DIRTY;
}
void
initialize_itemlist (itp)
ITEMLIST *itp;
{
(*itp->list_getter) (itp);
itp->flags |= LIST_INITIALIZED;
itp->flags &= ~LIST_DIRTY;
}
void
clean_itemlist (itp)
ITEMLIST *itp;
{
STRINGLIST *sl;
sl = itp->slist;
if (sl)
{
if ((itp->flags & (LIST_DONTFREEMEMBERS|LIST_DONTFREE)) == 0)
strvec_flush (sl->list);
if ((itp->flags & LIST_DONTFREE) == 0)
free (sl->list);
free (sl);
}
itp->slist = (STRINGLIST *)NULL;
itp->flags &= ~(LIST_DONTFREE|LIST_DONTFREEMEMBERS|LIST_INITIALIZED|LIST_DIRTY);
}
static int
shouldexp_filterpat (s)
char *s;
{
register char *p;
for (p = s; p && *p; p++)
{
if (*p == '\\')
p++;
else if (*p == '&')
return 1;
}
return 0;
}
/* Replace any instance of `&' in PAT with TEXT. Backslash may be used to
quote a `&' and inhibit substitution. Returns a new string. This just
calls stringlib.c:strcreplace(). */
static char *
preproc_filterpat (pat, text)
char *pat;
char *text;
{
char *ret;
ret = strcreplace (pat, '&', text, 1);
return ret;
}
/* Remove any match of FILTERPAT from SL. A `&' in FILTERPAT is replaced by
TEXT. A leading `!' in FILTERPAT negates the pattern; in this case
any member of SL->list that does *not* match will be removed. This returns
a new STRINGLIST with the matching members of SL *copied*. Any
non-matching members of SL->list are *freed*. */
STRINGLIST *
filter_stringlist (sl, filterpat, text)
STRINGLIST *sl;
char *filterpat, *text;
{
int i, m, not;
STRINGLIST *ret;
char *npat, *t;
if (sl == 0 || sl->list == 0 || sl->list_len == 0)
return sl;
npat = shouldexp_filterpat (filterpat) ? preproc_filterpat (filterpat, text) : filterpat;
not = (npat[0] == '!');
t = not ? npat + 1 : npat;
ret = strlist_create (sl->list_size);
for (i = 0; i < sl->list_len; i++)
{
m = strmatch (t, sl->list[i], FNMATCH_EXTFLAG);
if ((not && m == FNM_NOMATCH) || (not == 0 && m != FNM_NOMATCH))
free (sl->list[i]);
else
ret->list[ret->list_len++] = sl->list[i];
}
ret->list[ret->list_len] = (char *)NULL;
if (npat != filterpat)
free (npat);
return ret;
}
/* Turn an array of strings returned by rl_completion_matches into a STRINGLIST.
This understands how rl_completion_matches sets matches[0] (the lcd of the
strings in the list, unless it's the only match). */
STRINGLIST *
completions_to_stringlist (matches)
char **matches;
{
STRINGLIST *sl;
int mlen, i, n;
mlen = (matches == 0) ? 0 : strvec_len (matches);
sl = strlist_create (mlen + 1);
if (matches == 0 || matches[0] == 0)
return sl;
if (matches[1] == 0)
{
sl->list[0] = STRDUP (matches[0]);
sl->list[sl->list_len = 1] = (char *)NULL;
return sl;
}
for (i = 1, n = 0; i < mlen; i++, n++)
sl->list[n] = STRDUP (matches[i]);
sl->list_len = n;
sl->list[n] = (char *)NULL;
return sl;
}
/* Functions to manage the various ITEMLISTs that we populate internally.
The caller is responsible for setting ITP->flags correctly. */
static int
it_init_aliases (itp)
ITEMLIST *itp;
{
#ifdef ALIAS
alias_t **alias_list;
register int i, n;
STRINGLIST *sl;
alias_list = all_aliases ();
if (alias_list == 0)
{
itp->slist = (STRINGLIST *)NULL;
return 0;
}
for (n = 0; alias_list[n]; n++)
;
sl = strlist_create (n+1);
for (i = 0; i < n; i++)
sl->list[i] = STRDUP (alias_list[i]->name);
sl->list[n] = (char *)NULL;
sl->list_size = sl->list_len = n;
itp->slist = sl;
#else
itp->slist = (STRINGLIST *)NULL;
#endif
free (alias_list);
return 1;
}
static void
init_itemlist_from_varlist (itp, svfunc)
ITEMLIST *itp;
SVFUNC *svfunc;
{
SHELL_VAR **vlist;
STRINGLIST *sl;
register int i, n;
vlist = (*svfunc) ();
if (vlist == 0)
{
itp->slist = (STRINGLIST *)NULL;
return;
}
for (n = 0; vlist[n]; n++)
;
sl = strlist_create (n+1);
for (i = 0; i < n; i++)
sl->list[i] = savestring (vlist[i]->name);
sl->list[sl->list_len = n] = (char *)NULL;
itp->slist = sl;
}
static int
it_init_arrayvars (itp)
ITEMLIST *itp;
{
#if defined (ARRAY_VARS)
init_itemlist_from_varlist (itp, all_array_variables);
return 1;
#else
return 0;
#endif
}
static int
it_init_bindings (itp)
ITEMLIST *itp;
{
char **blist;
STRINGLIST *sl;
/* rl_funmap_names allocates blist, but not its members */
blist = (char **)rl_funmap_names (); /* XXX fix const later */
sl = strlist_create (0);
sl->list = blist;
sl->list_size = 0;
sl->list_len = strvec_len (sl->list);
itp->flags |= LIST_DONTFREEMEMBERS;
itp->slist = sl;
return 0;
}
static int
it_init_builtins (itp)
ITEMLIST *itp;
{
STRINGLIST *sl;
register int i, n;
sl = strlist_create (num_shell_builtins);
for (i = n = 0; i < num_shell_builtins; i++)
if (shell_builtins[i].function)
sl->list[n++] = shell_builtins[i].name;
sl->list[sl->list_len = n] = (char *)NULL;
itp->flags |= LIST_DONTFREEMEMBERS;
itp->slist = sl;
return 0;
}
static int
it_init_enabled (itp)
ITEMLIST *itp;
{
STRINGLIST *sl;
register int i, n;
sl = strlist_create (num_shell_builtins);
for (i = n = 0; i < num_shell_builtins; i++)
{
if (shell_builtins[i].function && (shell_builtins[i].flags & BUILTIN_ENABLED))
sl->list[n++] = shell_builtins[i].name;
}
sl->list[sl->list_len = n] = (char *)NULL;
itp->flags |= LIST_DONTFREEMEMBERS;
itp->slist = sl;
return 0;
}
static int
it_init_disabled (itp)
ITEMLIST *itp;
{
STRINGLIST *sl;
register int i, n;
sl = strlist_create (num_shell_builtins);
for (i = n = 0; i < num_shell_builtins; i++)
{
if (shell_builtins[i].function && ((shell_builtins[i].flags & BUILTIN_ENABLED) == 0))
sl->list[n++] = shell_builtins[i].name;
}
sl->list[sl->list_len = n] = (char *)NULL;
itp->flags |= LIST_DONTFREEMEMBERS;
itp->slist = sl;
return 0;
}
static int
it_init_exported (itp)
ITEMLIST *itp;
{
init_itemlist_from_varlist (itp, all_exported_variables);
return 0;
}
static int
it_init_functions (itp)
ITEMLIST *itp;
{
init_itemlist_from_varlist (itp, all_visible_functions);
return 0;
}
/* Like it_init_builtins, but includes everything the help builtin looks at,
not just builtins with an active implementing function. */
static int
it_init_helptopics (itp)
ITEMLIST *itp;
{
STRINGLIST *sl;
register int i, n;
sl = strlist_create (num_shell_builtins);
for (i = n = 0; i < num_shell_builtins; i++)
sl->list[n++] = shell_builtins[i].name;
sl->list[sl->list_len = n] = (char *)NULL;
itp->flags |= LIST_DONTFREEMEMBERS;
itp->slist = sl;
return 0;
}
static int
it_init_hostnames (itp)
ITEMLIST *itp;
{
STRINGLIST *sl;
sl = strlist_create (0);
sl->list = get_hostname_list ();
sl->list_len = sl->list ? strvec_len (sl->list) : 0;
sl->list_size = sl->list_len;
itp->slist = sl;
itp->flags |= LIST_DONTFREEMEMBERS|LIST_DONTFREE;
return 0;
}
static int
it_init_joblist (itp, jstate)
ITEMLIST *itp;
int jstate;
{
#if defined (JOB_CONTROL)
STRINGLIST *sl;
register int i;
register PROCESS *p;
char *s, *t;
JOB *j;
JOB_STATE ws; /* wanted state */
ws = JNONE;
if (jstate == 0)
ws = JRUNNING;
else if (jstate == 1)
ws = JSTOPPED;
sl = strlist_create (js.j_jobslots);
for (i = js.j_jobslots - 1; i >= 0; i--)
{
j = get_job_by_jid (i);
if (j == 0)
continue;
p = j->pipe;
if (jstate == -1 || JOBSTATE(i) == ws)
{
s = savestring (p->command);
t = strpbrk (s, " \t\n");
if (t)
*t = '\0';
sl->list[sl->list_len++] = s;
}
}
itp->slist = sl;
#else
itp->slist = (STRINGLIST *)NULL;
#endif
return 0;
}
static int
it_init_jobs (itp)
ITEMLIST *itp;
{
return (it_init_joblist (itp, -1));
}
static int
it_init_running (itp)
ITEMLIST *itp;
{
return (it_init_joblist (itp, 0));
}
static int
it_init_stopped (itp)
ITEMLIST *itp;
{
return (it_init_joblist (itp, 1));
}
static int
it_init_keywords (itp)
ITEMLIST *itp;
{
STRINGLIST *sl;
register int i, n;
for (n = 0; word_token_alist[n].word; n++)
;
sl = strlist_create (n);
for (i = 0; i < n; i++)
sl->list[i] = word_token_alist[i].word;
sl->list[sl->list_len = i] = (char *)NULL;
itp->flags |= LIST_DONTFREEMEMBERS;
itp->slist = sl;
return 0;
}
static int
it_init_signals (itp)
ITEMLIST *itp;
{
STRINGLIST *sl;
sl = strlist_create (0);
sl->list = signal_names;
sl->list_len = strvec_len (sl->list);
itp->flags |= LIST_DONTFREE;
itp->slist = sl;
return 0;
}
static int
it_init_variables (itp)
ITEMLIST *itp;
{
init_itemlist_from_varlist (itp, all_visible_variables);
return 0;
}
static int
it_init_setopts (itp)
ITEMLIST *itp;
{
STRINGLIST *sl;
sl = strlist_create (0);
sl->list = get_minus_o_opts ();
sl->list_len = strvec_len (sl->list);
itp->slist = sl;
itp->flags |= LIST_DONTFREEMEMBERS;
return 0;
}
static int
it_init_shopts (itp)
ITEMLIST *itp;
{
STRINGLIST *sl;
sl = strlist_create (0);
sl->list = get_shopt_options ();
sl->list_len = strvec_len (sl->list);
itp->slist = sl;
itp->flags |= LIST_DONTFREEMEMBERS;
return 0;
}
/* Generate a list of all matches for TEXT using the STRINGLIST in itp->slist
as the list of possibilities. If the itemlist has been marked dirty or
it should be regenerated every time, destroy the old STRINGLIST and make a
new one before trying the match. TEXT is dequoted before attempting a
match. */
static STRINGLIST *
gen_matches_from_itemlist (itp, text)
ITEMLIST *itp;
const char *text;
{
STRINGLIST *ret, *sl;
int tlen, i, n;
char *ntxt;
if ((itp->flags & (LIST_DIRTY|LIST_DYNAMIC)) ||
(itp->flags & LIST_INITIALIZED) == 0)
{
if (itp->flags & (LIST_DIRTY|LIST_DYNAMIC))
clean_itemlist (itp);
if ((itp->flags & LIST_INITIALIZED) == 0)
initialize_itemlist (itp);
}
if (itp->slist == 0)
return ((STRINGLIST *)NULL);
ret = strlist_create (itp->slist->list_len+1);
sl = itp->slist;
ntxt = bash_dequote_text (text);
tlen = STRLEN (ntxt);
for (i = n = 0; i < sl->list_len; i++)
{
if (tlen == 0 || STREQN (sl->list[i], ntxt, tlen))
ret->list[n++] = STRDUP (sl->list[i]);
}
ret->list[ret->list_len = n] = (char *)NULL;
FREE (ntxt);
return ret;
}
/* A wrapper for rl_filename_completion_function that dequotes the filename
before attempting completions. */
static char *
pcomp_filename_completion_function (text, state)
const char *text;
int state;
{
static char *dfn; /* dequoted filename */
int qc;
int iscompgen, iscompleting;
if (state == 0)
{
FREE (dfn);
/* remove backslashes quoting special characters in filenames. */
/* There are roughly three paths we can follow to get here:
1. complete -f
2. compgen -f "$word" from a completion function
3. compgen -f "$word" from the command line
They all need to be handled.
In the first two cases, readline will run the filename dequoting
function in rl_filename_completion_function if it found a filename
quoting character in the word to be completed
(rl_completion_found_quote). We run the dequoting function here
if we're running compgen, we're not completing, and the
rl_filename_completion_function won't dequote the filename
(rl_completion_found_quote == 0). */
iscompgen = this_shell_builtin == compgen_builtin;
iscompleting = RL_ISSTATE (RL_STATE_COMPLETING);
if (iscompgen && iscompleting == 0 && rl_completion_found_quote == 0
&& rl_filename_dequoting_function)
{
/* Use rl_completion_quote_character because any single or
double quotes have been removed by the time TEXT makes it
here, and we don't want to remove backslashes inside
quoted strings. */
dfn = (*rl_filename_dequoting_function) ((char *)text, rl_completion_quote_character);
}
/* Intended to solve a mismatched assumption by bash-completion. If
the text to be completed is empty, but bash-completion turns it into
a quoted string ('') assuming that this code will dequote it before
calling readline, do the dequoting. */
else if (iscompgen && iscompleting &&
pcomp_curtxt && *pcomp_curtxt == 0 &&
text && (*text == '\'' || *text == '"') && text[1] == text[0] && text[2] == 0 &&
rl_filename_dequoting_function)
dfn = (*rl_filename_dequoting_function) ((char *)text, rl_completion_quote_character);
/* Another mismatched assumption by bash-completion. If compgen is being
run as part of bash-completion, and the argument to compgen is not
the same as the word originally passed to the programmable completion
code, dequote the argument if it has quote characters. It's an
attempt to detect when bash-completion is quoting its filename
argument before calling compgen. */
/* We could check whether gen_shell_function_matches is in the call
stack by checking whether the gen-shell-function-matches tag is in
the unwind-protect stack, but there's no function to do that yet.
We could simply check whether we're executing in a function by
checking variable_context, and may end up doing that. */
else if (iscompgen && iscompleting && rl_filename_dequoting_function &&
pcomp_curtxt && text &&
STREQ (pcomp_curtxt, text) == 0 &&
variable_context &&
sh_contains_quotes (text)) /* guess */
dfn = (*rl_filename_dequoting_function) ((char *)text, rl_completion_quote_character);
else
dfn = savestring (text);
}
return (rl_filename_completion_function (dfn, state));
}
#define GEN_COMPS(bmap, flag, it, text, glist, tlist) \
do { \
if (bmap & flag) \
{ \
tlist = gen_matches_from_itemlist (it, text); \
if (tlist) \
{ \
glist = strlist_append (glist, tlist); \
strlist_dispose (tlist); \
} \
} \
} while (0)
#define GEN_XCOMPS(bmap, flag, text, func, cmatches, glist, tlist) \
do { \
if (bmap & flag) \
{ \
cmatches = rl_completion_matches (text, func); \
tlist = completions_to_stringlist (cmatches); \
glist = strlist_append (glist, tlist); \
strvec_dispose (cmatches); \
strlist_dispose (tlist); \
} \
} while (0)
/* Functions to generate lists of matches from the actions member of CS. */
static STRINGLIST *
gen_action_completions (cs, text)
COMPSPEC *cs;
const char *text;
{
STRINGLIST *ret, *tmatches;
char **cmatches; /* from rl_completion_matches ... */
unsigned long flags;
int t;
ret = tmatches = (STRINGLIST *)NULL;
flags = cs->actions;
GEN_COMPS (flags, CA_ALIAS, &it_aliases, text, ret, tmatches);
GEN_COMPS (flags, CA_ARRAYVAR, &it_arrayvars, text, ret, tmatches);
GEN_COMPS (flags, CA_BINDING, &it_bindings, text, ret, tmatches);
GEN_COMPS (flags, CA_BUILTIN, &it_builtins, text, ret, tmatches);
GEN_COMPS (flags, CA_DISABLED, &it_disabled, text, ret, tmatches);
GEN_COMPS (flags, CA_ENABLED, &it_enabled, text, ret, tmatches);
GEN_COMPS (flags, CA_EXPORT, &it_exports, text, ret, tmatches);
GEN_COMPS (flags, CA_FUNCTION, &it_functions, text, ret, tmatches);
GEN_COMPS (flags, CA_HELPTOPIC, &it_helptopics, text, ret, tmatches);
GEN_COMPS (flags, CA_HOSTNAME, &it_hostnames, text, ret, tmatches);
GEN_COMPS (flags, CA_JOB, &it_jobs, text, ret, tmatches);
GEN_COMPS (flags, CA_KEYWORD, &it_keywords, text, ret, tmatches);
GEN_COMPS (flags, CA_RUNNING, &it_running, text, ret, tmatches);
GEN_COMPS (flags, CA_SETOPT, &it_setopts, text, ret, tmatches);
GEN_COMPS (flags, CA_SHOPT, &it_shopts, text, ret, tmatches);
GEN_COMPS (flags, CA_SIGNAL, &it_signals, text, ret, tmatches);
GEN_COMPS (flags, CA_STOPPED, &it_stopped, text, ret, tmatches);
GEN_COMPS (flags, CA_VARIABLE, &it_variables, text, ret, tmatches);
GEN_XCOMPS(flags, CA_COMMAND, text, command_word_completion_function, cmatches, ret, tmatches);
GEN_XCOMPS(flags, CA_FILE, text, pcomp_filename_completion_function, cmatches, ret, tmatches);
GEN_XCOMPS(flags, CA_USER, text, rl_username_completion_function, cmatches, ret, tmatches);
GEN_XCOMPS(flags, CA_GROUP, text, bash_groupname_completion_function, cmatches, ret, tmatches);
GEN_XCOMPS(flags, CA_SERVICE, text, bash_servicename_completion_function, cmatches, ret, tmatches);
/* And lastly, the special case for directories */
if (flags & CA_DIRECTORY)
{
t = rl_filename_completion_desired;
rl_completion_mark_symlink_dirs = 1; /* override user preference */
cmatches = bash_directory_completion_matches (text);
/* If we did not want filename completion before this, and there are
no matches, turn off rl_filename_completion_desired so whatever
matches we get are not treated as filenames (it gets turned on by
rl_filename_completion_function unconditionally). */
if (t == 0 && cmatches == 0 && rl_filename_completion_desired == 1)
rl_filename_completion_desired = 0;
tmatches = completions_to_stringlist (cmatches);
ret = strlist_append (ret, tmatches);
strvec_dispose (cmatches);
strlist_dispose (tmatches);
}
return ret;
}
/* Generate a list of matches for CS->globpat. Unresolved: should this use
TEXT as a match prefix, or just go without? Currently, the code does not
use TEXT, just globs CS->globpat and returns the results. If we do decide
to use TEXT, we should call quote_string_for_globbing before the call to
glob_filename. */
static STRINGLIST *
gen_globpat_matches (cs, text)
COMPSPEC *cs;
const char *text;
{
STRINGLIST *sl;
sl = strlist_create (0);
sl->list = glob_filename (cs->globpat, 0);
if (GLOB_FAILED (sl->list))
sl->list = (char **)NULL;
if (sl->list)
sl->list_len = sl->list_size = strvec_len (sl->list);
return sl;
}
/* Perform the shell word expansions on CS->words and return the results.
Again, this ignores TEXT. */
static STRINGLIST *
gen_wordlist_matches (cs, text)
COMPSPEC *cs;
const char *text;
{
WORD_LIST *l, *l2;
STRINGLIST *sl;
int nw, tlen;
char *ntxt; /* dequoted TEXT to use in comparisons */
if (cs->words == 0 || cs->words[0] == '\0')
return ((STRINGLIST *)NULL);
/* This used to be a simple expand_string(cs->words, 0), but that won't
do -- there's no way to split a simple list into individual words
that way, since the shell semantics say that word splitting is done
only on the results of expansion. split_at_delims also handles embedded
quoted strings and preserves the quotes for the expand_words_shellexp
function call that follows. */
/* XXX - this is where this function spends most of its time */
l = split_at_delims (cs->words, strlen (cs->words), (char *)NULL, -1, 0, (int *)NULL, (int *)NULL);
if (l == 0)
return ((STRINGLIST *)NULL);
/* This will jump back to the top level if the expansion fails... */
l2 = expand_words_shellexp (l);
dispose_words (l);
nw = list_length (l2);
sl = strlist_create (nw + 1);
ntxt = bash_dequote_text (text);
tlen = STRLEN (ntxt);
for (nw = 0, l = l2; l; l = l->next)
{
if (tlen == 0 || STREQN (l->word->word, ntxt, tlen))
sl->list[nw++] = STRDUP (l->word->word);
}
sl->list[sl->list_len = nw] = (char *)NULL;
dispose_words (l2);
FREE (ntxt);
return sl;
}
#ifdef ARRAY_VARS
static SHELL_VAR *
bind_comp_words (lwords)
WORD_LIST *lwords;
{
SHELL_VAR *v;
v = find_variable ("COMP_WORDS");
if (v == 0)
v = make_new_array_variable ("COMP_WORDS");
if (readonly_p (v))
VUNSETATTR (v, att_readonly);
if (array_p (v) == 0)
v = convert_var_to_array (v);
v = assign_array_var_from_word_list (v, lwords, 0);
VUNSETATTR (v, att_invisible);
return v;
}
#endif /* ARRAY_VARS */
static void
bind_compfunc_variables (line, ind, lwords, cw, exported)
char *line;
int ind;
WORD_LIST *lwords;
int cw, exported;
{
char ibuf[INT_STRLEN_BOUND(int) + 1];
char *value;
SHELL_VAR *v;
size_t llen;
int c;
/* Set the variables that the function expects while it executes. Maybe
these should be in the function environment (temporary_env). */
v = bind_variable ("COMP_LINE", line, 0);
if (v && exported)
VSETATTR(v, att_exported);
/* Post bash-4.2: COMP_POINT is characters instead of bytes. */
c = line[ind];
line[ind] = '\0';
llen = MB_STRLEN (line);
line[ind] = c;
value = inttostr (llen, ibuf, sizeof(ibuf));
v = bind_int_variable ("COMP_POINT", value);
if (v && exported)
VSETATTR(v, att_exported);
value = inttostr (rl_completion_type, ibuf, sizeof (ibuf));
v = bind_int_variable ("COMP_TYPE", value);
if (v && exported)
VSETATTR(v, att_exported);
value = inttostr (rl_completion_invoking_key, ibuf, sizeof (ibuf));
v = bind_int_variable ("COMP_KEY", value);
if (v && exported)
VSETATTR(v, att_exported);
/* Since array variables can't be exported, we don't bother making the
array of words. */
if (exported == 0)
{
#ifdef ARRAY_VARS
v = bind_comp_words (lwords);
value = inttostr (cw, ibuf, sizeof(ibuf));
bind_int_variable ("COMP_CWORD", value);
#endif
}
else
array_needs_making = 1;
}
static void
unbind_compfunc_variables (exported)
int exported;
{
unbind_variable ("COMP_LINE");
unbind_variable ("COMP_POINT");
unbind_variable ("COMP_TYPE");
unbind_variable ("COMP_KEY");
#ifdef ARRAY_VARS
unbind_variable ("COMP_WORDS");
unbind_variable ("COMP_CWORD");
#endif
if (exported)
array_needs_making = 1;
}
/* Build the list of words to pass to a function or external command
as arguments. When the function or command is invoked,
$0 == function or command being invoked
$1 == command name
$2 == word to be completed (possibly null)
$3 == previous word
Functions can access all of the words in the current command line
with the COMP_WORDS array. External commands cannot; they have to
make do with the COMP_LINE and COMP_POINT variables. */
static WORD_LIST *
build_arg_list (cmd, cname, text, lwords, ind)
char *cmd;
const char *cname;
const char *text;
WORD_LIST *lwords;
int ind;
{
WORD_LIST *ret, *cl, *l;
WORD_DESC *w;
int i;
ret = (WORD_LIST *)NULL;
w = make_word (cmd);
ret = make_word_list (w, (WORD_LIST *)NULL); /* $0 */
w = make_word (cname); /* $1 */
cl = ret->next = make_word_list (w, (WORD_LIST *)NULL);
w = make_word (text);
cl->next = make_word_list (w, (WORD_LIST *)NULL); /* $2 */
cl = cl->next;
/* Search lwords for current word */
for (l = lwords, i = 1; l && i < ind-1; l = l->next, i++)
;
w = (l && l->word) ? copy_word (l->word) : make_word ("");
cl->next = make_word_list (w, (WORD_LIST *)NULL);
return ret;
}
/* Build a command string with
$0 == cs->funcname (function to execute for completion list)
$1 == command name (command being completed)
$2 = word to be completed (possibly null)
$3 = previous word
and run in the current shell. The function should put its completion
list into the array variable COMPREPLY. We build a STRINGLIST
from the results and return it.
Since the shell function should return its list of matches in an array
variable, this does nothing if arrays are not compiled into the shell. */
static STRINGLIST *
gen_shell_function_matches (cs, cmd, text, line, ind, lwords, nw, cw, foundp)
COMPSPEC *cs;
const char *cmd;
const char *text;
char *line;
int ind;
WORD_LIST *lwords;
int nw, cw;
int *foundp;
{
char *funcname;
STRINGLIST *sl;
SHELL_VAR *f, *v;
WORD_LIST *cmdlist;
int fval, found;
sh_parser_state_t ps;
sh_parser_state_t * restrict pps;
#if defined (ARRAY_VARS)
ARRAY *a;
#endif
found = 0;
if (foundp)
*foundp = found;
funcname = cs->funcname;
f = find_function (funcname);
if (f == 0)
{
internal_error (_("completion: function `%s' not found"), funcname);
rl_ding ();
rl_on_new_line ();
return ((STRINGLIST *)NULL);
}
#if !defined (ARRAY_VARS)
return ((STRINGLIST *)NULL);
#else
/* We pass cw - 1 because command_line_to_word_list returns indices that are
1-based, while bash arrays are 0-based. */
bind_compfunc_variables (line, ind, lwords, cw - 1, 0);
cmdlist = build_arg_list (funcname, cmd, text, lwords, cw);
pps = &ps;
save_parser_state (pps);
begin_unwind_frame ("gen-shell-function-matches");
add_unwind_protect (restore_parser_state, (char *)pps);
add_unwind_protect (dispose_words, (char *)cmdlist);
add_unwind_protect (unbind_compfunc_variables, (char *)0);
fval = execute_shell_function (f, cmdlist);
discard_unwind_frame ("gen-shell-function-matches");
restore_parser_state (pps);
found = fval != EX_NOTFOUND;
if (fval == EX_RETRYFAIL)
found |= PCOMP_RETRYFAIL;
if (foundp)
*foundp = found;
/* Now clean up and destroy everything. */
dispose_words (cmdlist);
unbind_compfunc_variables (0);
/* The list of completions is returned in the array variable COMPREPLY. */
v = find_variable ("COMPREPLY");
if (v == 0)
return ((STRINGLIST *)NULL);
if (array_p (v) == 0)
v = convert_var_to_array (v);
VUNSETATTR (v, att_invisible);
a = array_cell (v);
if (found == 0 || (found & PCOMP_RETRYFAIL) || a == 0 || array_empty (a))
sl = (STRINGLIST *)NULL;
else
{
/* XXX - should we filter the list of completions so only those matching
TEXT are returned? Right now, we do not. */
sl = strlist_create (0);
sl->list = array_to_argv (a);
sl->list_len = sl->list_size = array_num_elements (a);
}
/* XXX - should we unbind COMPREPLY here? */
unbind_variable ("COMPREPLY");
return (sl);
#endif
}
/* Build a command string with
$0 == cs->command (command to execute for completion list)
$1 == command name (command being completed)
$2 = word to be completed (possibly null)
$3 = previous word
and run in with command substitution. Parse the results, one word
per line, with backslashes allowed to escape newlines. Build a
STRINGLIST from the results and return it. */
static STRINGLIST *
gen_command_matches (cs, cmd, text, line, ind, lwords, nw, cw)
COMPSPEC *cs;
const char *cmd;
const char *text;
char *line;
int ind;
WORD_LIST *lwords;
int nw, cw;
{
char *csbuf, *cscmd, *t;
int cmdlen, cmdsize, n, ws, we;
WORD_LIST *cmdlist, *cl;
WORD_DESC *tw;
STRINGLIST *sl;
bind_compfunc_variables (line, ind, lwords, cw, 1);
cmdlist = build_arg_list (cs->command, cmd, text, lwords, cw);
/* Estimate the size needed for the buffer. */
n = strlen (cs->command);
cmdsize = n + 1;
for (cl = cmdlist->next; cl; cl = cl->next)
cmdsize += STRLEN (cl->word->word) + 3;
cmdsize += 2;
/* allocate the string for the command and fill it in. */
cscmd = (char *)xmalloc (cmdsize + 1);
strcpy (cscmd, cs->command); /* $0 */
cmdlen = n;
cscmd[cmdlen++] = ' ';
for (cl = cmdlist->next; cl; cl = cl->next) /* $1, $2, $3, ... */
{
t = sh_single_quote (cl->word->word ? cl->word->word : "");
n = strlen (t);
RESIZE_MALLOCED_BUFFER (cscmd, cmdlen, n + 2, cmdsize, 64);
strcpy (cscmd + cmdlen, t);
cmdlen += n;
if (cl->next)
cscmd[cmdlen++] = ' ';
free (t);
}
cscmd[cmdlen] = '\0';
tw = command_substitute (cscmd, 0);
csbuf = tw ? tw->word : (char *)NULL;
if (tw)
dispose_word_desc (tw);
/* Now clean up and destroy everything. */
dispose_words (cmdlist);
free (cscmd);
unbind_compfunc_variables (1);
if (csbuf == 0 || *csbuf == '\0')
{
FREE (csbuf);
return ((STRINGLIST *)NULL);
}
/* Now break CSBUF up at newlines, with backslash allowed to escape a
newline, and put the individual words into a STRINGLIST. */
sl = strlist_create (16);
for (ws = 0; csbuf[ws]; )
{
we = ws;
while (csbuf[we] && csbuf[we] != '\n')
{
if (csbuf[we] == '\\' && csbuf[we+1] == '\n')
we++;
we++;
}
t = substring (csbuf, ws, we);
if (sl->list_len >= sl->list_size - 1)
strlist_resize (sl, sl->list_size + 16);
sl->list[sl->list_len++] = t;
while (csbuf[we] == '\n') we++;
ws = we;
}
sl->list[sl->list_len] = (char *)NULL;
free (csbuf);
return (sl);
}
static WORD_LIST *
command_line_to_word_list (line, llen, sentinel, nwp, cwp)
char *line;
int llen, sentinel, *nwp, *cwp;
{
WORD_LIST *ret;
char *delims;
#if 0
delims = "()<>;&| \t\n"; /* shell metacharacters break words */
#else
delims = rl_completer_word_break_characters;
#endif
ret = split_at_delims (line, llen, delims, sentinel, SD_NOQUOTEDELIM, nwp, cwp);
return (ret);
}
/* Evaluate COMPSPEC *cs and return all matches for WORD. */
STRINGLIST *
gen_compspec_completions (cs, cmd, word, start, end, foundp)
COMPSPEC *cs;
const char *cmd;
const char *word;
int start, end;
int *foundp;
{
STRINGLIST *ret, *tmatches;
char *line;
int llen, nw, cw, found, foundf;
WORD_LIST *lwords;
WORD_DESC *lw;
COMPSPEC *tcs;
found = 1;
#ifdef DEBUG
debug_printf ("gen_compspec_completions (%s, %s, %d, %d)", cmd, word, start, end);
debug_printf ("gen_compspec_completions: %s -> %p", cmd, cs);
#endif
ret = gen_action_completions (cs, word);
#ifdef DEBUG
if (ret && progcomp_debug)
{
debug_printf ("gen_action_completions (%p, %s) -->", cs, word);
strlist_print (ret, "\t");
rl_on_new_line ();
}
#endif
/* Now we start generating completions based on the other members of CS. */
if (cs->globpat)
{
tmatches = gen_globpat_matches (cs, word);
if (tmatches)
{
#ifdef DEBUG
if (progcomp_debug)
{
debug_printf ("gen_globpat_matches (%p, %s) -->", cs, word);
strlist_print (tmatches, "\t");
rl_on_new_line ();
}
#endif
ret = strlist_append (ret, tmatches);
strlist_dispose (tmatches);
rl_filename_completion_desired = 1;
}
}
if (cs->words)
{
tmatches = gen_wordlist_matches (cs, word);
if (tmatches)
{
#ifdef DEBUG
if (progcomp_debug)
{
debug_printf ("gen_wordlist_matches (%p, %s) -->", cs, word);
strlist_print (tmatches, "\t");
rl_on_new_line ();
}
#endif
ret = strlist_append (ret, tmatches);
strlist_dispose (tmatches);
}
}
lwords = (WORD_LIST *)NULL;
line = (char *)NULL;
if (cs->command || cs->funcname)
{
/* If we have a command or function to execute, we need to first break
the command line into individual words, find the number of words,
and find the word in the list containing the word to be completed. */
line = substring (rl_line_buffer, start, end);
llen = end - start;
#ifdef DEBUG
debug_printf ("command_line_to_word_list (%s, %d, %d, %p, %p)",
line, llen, rl_point - start, &nw, &cw);
#endif
lwords = command_line_to_word_list (line, llen, rl_point - start, &nw, &cw);
/* If we skipped a NULL word at the beginning of the line, add it back */
if (lwords && lwords->word && cmd[0] == 0 && lwords->word->word[0] != 0)
{
lw = make_bare_word (cmd);
lwords = make_word_list (lw, lwords);
nw++;
cw++;
}
#ifdef DEBUG
if (lwords == 0 && llen > 0)
debug_printf ("ERROR: command_line_to_word_list returns NULL");
else if (progcomp_debug)
{
debug_printf ("command_line_to_word_list -->");
printf ("\t");
print_word_list (lwords, "!");
printf ("\n");
fflush(stdout);
rl_on_new_line ();
}
#endif
}
if (cs->funcname)
{
foundf = 0;
tmatches = gen_shell_function_matches (cs, cmd, word, line, rl_point - start, lwords, nw, cw, &foundf);
if (foundf != 0)
found = foundf;
if (tmatches)
{
#ifdef DEBUG
if (progcomp_debug)
{
debug_printf ("gen_shell_function_matches (%p, %s, %s, %p, %d, %d) -->", cs, cmd, word, lwords, nw, cw);
strlist_print (tmatches, "\t");
rl_on_new_line ();
}
#endif
ret = strlist_append (ret, tmatches);
strlist_dispose (tmatches);
}
}
if (cs->command)
{
tmatches = gen_command_matches (cs, cmd, word, line, rl_point - start, lwords, nw, cw);
if (tmatches)
{
#ifdef DEBUG
if (progcomp_debug)
{
debug_printf ("gen_command_matches (%p, %s, %s, %p, %d, %d) -->", cs, cmd, word, lwords, nw, cw);
strlist_print (tmatches, "\t");
rl_on_new_line ();
}
#endif
ret = strlist_append (ret, tmatches);
strlist_dispose (tmatches);
}
}
if (cs->command || cs->funcname)
{
if (lwords)
dispose_words (lwords);
FREE (line);
}
if (foundp)
*foundp = found;
if (found == 0 || (found & PCOMP_RETRYFAIL))
{
strlist_dispose (ret);
return NULL;
}
if (cs->filterpat)
{
tmatches = filter_stringlist (ret, cs->filterpat, word);
#ifdef DEBUG
if (progcomp_debug)
{
debug_printf ("filter_stringlist (%p, %s, %s) -->", ret, cs->filterpat, word);
strlist_print (tmatches, "\t");
rl_on_new_line ();
}
#endif
if (ret && ret != tmatches)
{
FREE (ret->list);
free (ret);
}
ret = tmatches;
}
if (cs->prefix || cs->suffix)
ret = strlist_prefix_suffix (ret, cs->prefix, cs->suffix);
/* If no matches have been generated and the user has specified that
directory completion should be done as a default, call
gen_action_completions again to generate a list of matching directory
names. */
if ((ret == 0 || ret->list_len == 0) && (cs->options & COPT_DIRNAMES))
{
tcs = compspec_create ();
tcs->actions = CA_DIRECTORY;
FREE (ret);
ret = gen_action_completions (tcs, word);
compspec_dispose (tcs);
}
else if (cs->options & COPT_PLUSDIRS)
{
tcs = compspec_create ();
tcs->actions = CA_DIRECTORY;
tmatches = gen_action_completions (tcs, word);
ret = strlist_append (ret, tmatches);
strlist_dispose (tmatches);
compspec_dispose (tcs);
}
return (ret);
}
void
pcomp_set_readline_variables (flags, nval)
int flags, nval;
{
/* If the user specified that the compspec returns filenames, make
sure that readline knows it. */
if (flags & COPT_FILENAMES)
rl_filename_completion_desired = nval;
/* If the user doesn't want a space appended, tell readline. */
if (flags & COPT_NOSPACE)
rl_completion_suppress_append = nval;
/* The value here is inverted, since the default is on and the `noquote'
option is supposed to turn it off */
if (flags & COPT_NOQUOTE)
rl_filename_quoting_desired = 1 - nval;
}
/* Set or unset FLAGS in the options word of the current compspec.
SET_OR_UNSET is 1 for setting, 0 for unsetting. */
void
pcomp_set_compspec_options (cs, flags, set_or_unset)
COMPSPEC *cs;
int flags, set_or_unset;
{
if (cs == 0 && ((cs = pcomp_curcs) == 0))
return;
if (set_or_unset)
cs->options |= flags;
else
cs->options &= ~flags;
}
static STRINGLIST *
gen_progcomp_completions (ocmd, cmd, word, start, end, foundp, retryp, lastcs)
const char *ocmd;
const char *cmd;
const char *word;
int start, end;
int *foundp, *retryp;
COMPSPEC **lastcs;
{
COMPSPEC *cs, *oldcs;
const char *oldcmd, *oldtxt;
STRINGLIST *ret;
cs = progcomp_search (ocmd);
if (cs == 0 || cs == *lastcs)
{
#if 0
if (foundp)
*foundp = 0;
#endif
return (NULL);
}
if (*lastcs)
compspec_dispose (*lastcs);
cs->refcount++; /* XXX */
*lastcs = cs;
cs = compspec_copy (cs);
oldcs = pcomp_curcs;
oldcmd = pcomp_curcmd;
oldtxt = pcomp_curtxt;
pcomp_curcs = cs;
pcomp_curcmd = cmd;
pcomp_curtxt = word;
ret = gen_compspec_completions (cs, cmd, word, start, end, foundp);
pcomp_curcs = oldcs;
pcomp_curcmd = oldcmd;
pcomp_curtxt = oldtxt;
/* We need to conditionally handle setting *retryp here */
if (retryp)
*retryp = foundp && (*foundp & PCOMP_RETRYFAIL);
if (foundp)
{
*foundp &= ~PCOMP_RETRYFAIL;
*foundp |= cs->options;
}
compspec_dispose (cs);
return ret;
}
/* The driver function for the programmable completion code. Returns a list
of matches for WORD, which is an argument to command CMD. START and END
bound the command currently being completed in rl_line_buffer. */
char **
programmable_completions (cmd, word, start, end, foundp)
const char *cmd;
const char *word;
int start, end, *foundp;
{
COMPSPEC *cs, *lastcs;
STRINGLIST *ret;
char **rmatches, *t;
int found, retry, count;
lastcs = 0;
found = count = 0;
do
{
retry = 0;
/* We look at the basename of CMD if the full command does not have
an associated COMPSPEC. */
ret = gen_progcomp_completions (cmd, cmd, word, start, end, &found, &retry, &lastcs);
if (found == 0)
{
t = strrchr (cmd, '/');
if (t && *(++t))
ret = gen_progcomp_completions (t, cmd, word, start, end, &found, &retry, &lastcs);
}
if (found == 0)
ret = gen_progcomp_completions (DEFAULTCMD, cmd, word, start, end, &found, &retry, &lastcs);
count++;
if (count > 32)
{
internal_warning ("programmable_completion: %s: possible retry loop", cmd);
break;
}
}
while (retry);
if (ret)
{
rmatches = ret->list;
free (ret);
}
else
rmatches = (char **)NULL;
if (foundp)
*foundp = found;
if (lastcs) /* XXX - should be while? */
compspec_dispose (lastcs);
return (rmatches);
}
#endif /* PROGRAMMABLE_COMPLETION */
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