1 /*@ S-nail - a mail user agent derived from Berkeley Mail.
2 *@ Shell "word", file- and other name expansions, incl. file globbing.
3 *@ TODO v15: peek signal states while opendir/readdir/etc.
5 * Copyright (c) 2000-2004 Gunnar Ritter, Freiburg i. Br., Germany.
6 * Copyright (c) 2012 - 2017 Steffen (Daode) Nurpmeso <steffen@sdaoden.eu>.
9 * Copyright (c) 1980, 1993
10 * The Regents of the University of California. All rights reserved.
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 * 3. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
39 #ifndef HAVE_AMALGAMATION
51 * Environment variable names used by the utilities in the Shell and
52 * Utilities volume of POSIX.1-2008 consist solely of uppercase
53 * letters, digits, and the <underscore> ('_') from the characters
54 * defined in Portable Character Set and do not begin with a digit.
55 * Other characters may be permitted by an implementation;
56 * applications shall tolerate the presence of such names.
57 * We do support the hyphen-minus "-" (except in last position for ${x[:]-y}).
58 * We support some special parameter names for one-letter(++) variable names;
59 * these have counterparts in the code that manages internal variables,
60 * and some more special treatment below! */
61 #define a_SHEXP_ISVARC(C) (alnumchar(C) || (C) == '_' || (C) == '-')
62 #define a_SHEXP_ISVARC_BAD1ST(C) (digitchar(C)) /* (Actually assumed below!) */
63 #define a_SHEXP_ISVARC_BADNST(C) ((C) == '-')
65 enum a_shexp_quote_flags
{
67 a_SHEXP_QUOTE_ROUNDTRIP
= 1u<<0, /* Result won't be consumed immediately */
69 a_SHEXP_QUOTE_T_REVSOL
= 1u<<8, /* Type: by reverse solidus */
70 a_SHEXP_QUOTE_T_SINGLE
= 1u<<9, /* Type: single-quotes */
71 a_SHEXP_QUOTE_T_DOUBLE
= 1u<<10, /* Type: double-quotes */
72 a_SHEXP_QUOTE_T_DOLLAR
= 1u<<11, /* Type: dollar-single-quotes */
73 a_SHEXP_QUOTE_T_MASK
= a_SHEXP_QUOTE_T_REVSOL
| a_SHEXP_QUOTE_T_SINGLE
|
74 a_SHEXP_QUOTE_T_DOUBLE
| a_SHEXP_QUOTE_T_DOLLAR
,
76 a_SHEXP_QUOTE__FREESHIFT
= 16u
80 struct a_shexp_glob_ctx
{
81 char const *sgc_patdat
; /* Remaining pattern (at and below level) */
83 struct n_string
*sgc_outer
; /* Resolved path up to this level */
89 struct a_shexp_quote_ctx
{
90 struct n_string
*sqc_store
; /* Result storage */
91 struct str sqc_input
; /* Input data, topmost level */
93 ui32_t sqc_cnt_single
;
94 ui32_t sqc_cnt_double
;
95 ui32_t sqc_cnt_dollar
;
96 enum a_shexp_quote_flags sqc_flags
;
100 struct a_shexp_quote_lvl
{
101 struct a_shexp_quote_lvl
*sql_link
; /* Outer level */
102 struct str sql_dat
; /* This level (has to) handle(d) */
103 enum a_shexp_quote_flags sql_flags
;
107 /* Locate the user's mailbox file (where new, unread mail is queued) */
108 static char *a_shexp_findmail(char const *user
, bool_t force
);
110 /* Expand ^~/? and ^~USER/? constructs.
111 * Returns the completely resolved (maybe empty or identical to input)
112 * salloc()ed string */
113 static char *a_shexp_tilde(char const *s
);
115 /* Perform fnmatch(3). May return NULL on error */
116 static char *a_shexp_globname(char const *name
, enum fexp_mode fexpm
);
118 static bool_t
a_shexp__glob(struct a_shexp_glob_ctx
*sgcp
,
119 struct n_strlist
**slpp
);
120 static int a_shexp__globsort(void const *cvpa
, void const *cvpb
);
123 /* Parse an input string and create a sh(1)ell-quoted result */
124 static void a_shexp__quote(struct a_shexp_quote_ctx
*sqcp
,
125 struct a_shexp_quote_lvl
*sqlp
);
128 a_shexp_findmail(char const *user
, bool_t force
){
134 if((cp
= ok_vlook(inbox
)) != NULL
&& *cp
!= '\0'){
135 /* Folder extra introduced to avoid % recursion loops */
136 if((rv
= fexpand(cp
, FEXP_NSPECIAL
| FEXP_NFOLDER
| FEXP_NSHELL
)
139 n_err(_("*inbox* expansion failed, using $MAIL / builtin: %s\n"), cp
);
142 if((cp
= ok_vlook(MAIL
)) != NULL
){
151 ul
= strlen(user
) +1;
152 i
= sizeof(VAL_MAIL
) -1 + 1 + ul
;
155 memcpy(rv
, VAL_MAIL
, (i
= sizeof(VAL_MAIL
) -1));
157 memcpy(&rv
[++i
], user
, ul
);
165 a_shexp_tilde(char const *s
){
172 if(*(rp
= &s
[1]) == '/' || *rp
== '\0'){
176 if((rp
= strchr(np
= rp
, '/')) != NULL
){
177 nl
= PTR2SIZE(rp
- np
);
178 np
= savestrbuf(np
, nl
);
183 if((pwp
= getpwnam(np
)) == NULL
){
191 rv
= salloc(nl
+ 1 + rl
+1);
194 memcpy(rv
+ nl
, rp
, rl
);
204 a_shexp_globname(char const *name
, enum fexp_mode fexpm
){
206 struct a_shexp_glob_ctx sgc
;
207 struct n_string outer
;
208 struct n_strlist
*slp
;
212 memset(&sgc
, 0, sizeof sgc
);
213 sgc
.sgc_patlen
= strlen(name
);
214 sgc
.sgc_patdat
= savestrbuf(name
, sgc
.sgc_patlen
);
215 sgc
.sgc_outer
= n_string_reserve(n_string_creat(&outer
), sgc
.sgc_patlen
);
216 sgc
.sgc_flags
= ((fexpm
& FEXP_SILENT
) != 0);
218 if(a_shexp__glob(&sgc
, &slp
))
222 n_string_gut(&outer
);
228 cp
= n_UNCONST(N_("File pattern does not match"));
230 }else if(slp
->sl_next
== NULL
)
231 cp
= savestrbuf(slp
->sl_dat
, slp
->sl_len
);
232 else if(fexpm
& FEXP_MULTIOK
){
233 struct n_strlist
**sorta
, *xslp
;
237 for(xslp
= slp
; xslp
!= NULL
; xslp
= xslp
->sl_next
){
239 l
+= xslp
->sl_len
+ 1;
242 sorta
= smalloc(sizeof(*sorta
) * no
);
244 for(xslp
= slp
; xslp
!= NULL
; xslp
= xslp
->sl_next
)
246 qsort(sorta
, no
, sizeof *sorta
, &a_shexp__globsort
);
250 for(i
= 0; i
< no
; ++i
){
252 memcpy(&cp
[l
], xslp
->sl_dat
, xslp
->sl_len
);
259 n_pstate
|= n_PS_EXPAND_MULTIRESULT
;
261 cp
= n_UNCONST(N_("File pattern matches multiple results"));
267 struct n_strlist
*tmp
= slp
;
276 if(!(fexpm
& FEXP_SILENT
)){
277 name
= n_shexp_quote_cp(name
, FAL0
);
278 n_err("%s: %s\n", V_(cp
), name
);
283 #else /* HAVE_FNMATCH */
286 if(!(fexpm
& FEXP_SILENT
))
287 n_err(_("No filename pattern (fnmatch(3)) support compiled in\n"));
288 return savestr(name
);
294 a_shexp__glob(struct a_shexp_glob_ctx
*sgcp
, struct n_strlist
**slpp
){
295 enum{a_SILENT
= 1<<0, a_DEEP
=1<<1, a_SALLOC
=1<<2};
297 struct a_shexp_glob_ctx nsgc
;
301 char const *ccp
, *myp
;
304 /* We need some special treatment for the outermost level */
305 if(!(sgcp
->sgc_flags
& a_DEEP
)){
306 if(sgcp
->sgc_patlen
> 0 && sgcp
->sgc_patdat
[0] == '/'){
307 myp
= n_string_cp(n_string_push_c(sgcp
->sgc_outer
, '/'));
313 myp
= n_string_cp(sgcp
->sgc_outer
);
314 old_outerlen
= sgcp
->sgc_outer
->s_len
;
316 /* Separate current directory/pattern level from any possible remaining
317 * pattern in order to be able to use it for fnmatch(3) */
318 if((ccp
= memchr(sgcp
->sgc_patdat
, '/', sgcp
->sgc_patlen
)) == NULL
)
322 nsgc
.sgc_flags
|= a_DEEP
;
323 sgcp
->sgc_patlen
= PTR2SIZE((nsgc
.sgc_patdat
= &ccp
[1]) -
324 &sgcp
->sgc_patdat
[0]);
325 nsgc
.sgc_patlen
-= sgcp
->sgc_patlen
;
327 if(sgcp
->sgc_patlen
> 0){
328 assert(sgcp
->sgc_patdat
[sgcp
->sgc_patlen
-1] == '/');
329 ((char*)n_UNCONST(sgcp
->sgc_patdat
))[--sgcp
->sgc_patlen
] = '\0';
333 /* Our current directory level */
334 /* xxx Plenty of room for optimizations, like quickshot lstat(2) which may
335 * xxx be the (sole) result depending on pattern surroundings, etc. */
336 if((dp
= opendir(myp
)) == NULL
){
339 switch((err
= n_err_no
)){
341 ccp
= N_("cannot access paths under non-directory");
344 ccp
= N_("path component of (sub)pattern non-existent");
347 ccp
= N_("file permission for file (sub)pattern denied");
350 ccp
= N_("cannot handle file (sub)pattern");
355 /* As necessary, quote bytes in the current pattern */
361 for(need
= FAL0
, i
= 0, myp
= sgcp
->sgc_patdat
; *myp
!= '\0'; ++myp
)
363 case '\'': case '"': case '\\': case '$':
375 for(i
= 0, myp
= sgcp
->sgc_patdat
; *myp
!= '\0'; ++myp
)
377 case '\'': case '"': case '\\': case '$':
388 myp
= sgcp
->sgc_patdat
;
391 while((dep
= readdir(dp
)) != NULL
){
392 switch(fnmatch(myp
, dep
->d_name
, FNM_PATHNAME
| FNM_PERIOD
)){
394 /* A match expresses the desire to recurse if there is more pattern */
395 if(nsgc
.sgc_patlen
> 0){
398 n_string_push_cp((sgcp
->sgc_outer
->s_len
> 1
399 ? n_string_push_c(sgcp
->sgc_outer
, '/') : sgcp
->sgc_outer
),
403 #ifdef HAVE_DIRENT_TYPE
404 if(dep
->d_type
== DT_DIR
)
406 else if(dep
->d_type
== DT_LNK
|| dep
->d_type
== DT_UNKNOWN
)
411 if(stat(n_string_cp(sgcp
->sgc_outer
), &sb
)){
412 ccp
= N_("I/O error when querying file status");
414 }else if(S_ISDIR(sb
.st_mode
))
418 /* TODO We recurse with current dir FD open, which could E[MN]FILE!
419 * TODO Instead save away a list of such n_string's for later */
420 if(isdir
&& !a_shexp__glob(&nsgc
, slpp
)){
425 n_string_trunc(sgcp
->sgc_outer
, old_outerlen
);
427 struct n_strlist
*slp
;
430 i
= strlen(dep
->d_name
);
431 j
= (old_outerlen
> 0) ? old_outerlen
+ 1 + i
: i
;
432 slp
= n_STRLIST_ALLOC(j
);
434 slpp
= &slp
->sl_next
;
436 if((j
= old_outerlen
) > 0){
437 memcpy(&slp
->sl_dat
[0], sgcp
->sgc_outer
->s_dat
, j
);
438 if(slp
->sl_dat
[j
-1] != '/')
439 slp
->sl_dat
[j
++] = '/';
441 memcpy(&slp
->sl_dat
[j
], dep
->d_name
, i
);
442 slp
->sl_dat
[j
+= i
] = '\0';
449 ccp
= N_("fnmatch(3) cannot handle file (sub)pattern");
459 return (ccp
== NULL
);
462 if(!(sgcp
->sgc_flags
& a_SILENT
)){
465 if(sgcp
->sgc_outer
->s_len
> 0){
466 s2
= n_shexp_quote_cp(n_string_cp(sgcp
->sgc_outer
), FAL0
);
471 n_err("%s: %s%s%s\n", V_(ccp
), s2
, s3
,
472 n_shexp_quote_cp(sgcp
->sgc_patdat
, FAL0
));
478 a_shexp__globsort(void const *cvpa
, void const *cvpb
){
480 struct n_strlist
const * const *slpa
, * const *slpb
;
485 rv
= asccasecmp((*slpa
)->sl_dat
, (*slpb
)->sl_dat
);
489 #endif /* HAVE_FNMATCH */
492 a_shexp__quote(struct a_shexp_quote_ctx
*sqcp
, struct a_shexp_quote_lvl
*sqlp
){
493 /* XXX Because of the problems caused by ISO C multibyte interface we cannot
494 * XXX use the recursive implementation because of stateful encodings.
495 * XXX I.e., if a quoted substring cannot be self-contained - the data after
496 * XXX the quote relies on "the former state", then this doesn't make sense.
497 * XXX Therefore this is not fully programmed out but instead only detects
498 * XXX the "most fancy" quoting necessary, and directly does that.
499 * XXX As a result of this, T_REVSOL and T_DOUBLE are not even considered.
500 * XXX Otherwise we rather have to convert to wide first and act on that,
501 * XXX e.g., call visual_info(n_VISUAL_INFO_WOUT_CREATE) on entire input */
502 #undef a_SHEXP_QUOTE_RECURSE /* XXX (Needs complete revisit, then) */
503 #ifdef a_SHEXP_QUOTE_RECURSE
504 # define jrecurse jrecurse
505 struct a_shexp_quote_lvl sql
;
507 # define jrecurse jstep
509 struct n_visual_info_ctx vic
;
510 union {struct a_shexp_quote_lvl
*head
; struct n_string
*store
;} u
;
513 char const *ib
, *ib_base
;
516 ib_base
= ib
= sqlp
->sql_dat
.s
;
517 il
= sqlp
->sql_dat
.l
;
518 flags
= sqlp
->sql_flags
;
520 /* Iterate over the entire input, classify characters and type of quotes
521 * along the way. Whenever a quote change has to be applied, adjust flags
522 * for the new situation -, setup sql.* and recurse- */
528 if(flags
& a_SHEXP_QUOTE_T_DOLLAR
)
530 if(c
== '\t' && (flags
& (a_SHEXP_QUOTE_T_REVSOL
|
531 a_SHEXP_QUOTE_T_SINGLE
| a_SHEXP_QUOTE_T_DOUBLE
)))
533 #ifdef a_SHEXP_QUOTE_RECURSE
534 ++sqcp
->sqc_cnt_dollar
;
536 flags
= (flags
& ~a_SHEXP_QUOTE_T_MASK
) | a_SHEXP_QUOTE_T_DOLLAR
;
538 }else if(blankspacechar(c
) || c
== '|' || c
== '&' || c
== ';' ||
539 /* Whereas we don't support those, quote them for the sh(1)ell */
540 c
== '(' || c
== ')' || c
== '<' || c
== '>' ||
541 c
== '"' || c
== '$'){
542 if(flags
& a_SHEXP_QUOTE_T_MASK
)
544 #ifdef a_SHEXP_QUOTE_RECURSE
545 ++sqcp
->sqc_cnt_single
;
547 flags
= (flags
& ~a_SHEXP_QUOTE_T_MASK
) | a_SHEXP_QUOTE_T_SINGLE
;
550 if(flags
& (a_SHEXP_QUOTE_T_MASK
& ~a_SHEXP_QUOTE_T_SINGLE
))
552 #ifdef a_SHEXP_QUOTE_RECURSE
553 ++sqcp
->sqc_cnt_dollar
;
555 flags
= (flags
& ~a_SHEXP_QUOTE_T_MASK
) | a_SHEXP_QUOTE_T_DOLLAR
;
557 }else if(c
== '\\' || (c
== '#' && ib
== ib_base
)){
558 if(flags
& a_SHEXP_QUOTE_T_MASK
)
560 #ifdef a_SHEXP_QUOTE_RECURSE
561 ++sqcp
->sqc_cnt_single
;
563 flags
= (flags
& ~a_SHEXP_QUOTE_T_MASK
) | a_SHEXP_QUOTE_T_SINGLE
;
565 }else if(!asciichar(c
)){
566 /* Need to keep together multibytes */
567 #ifdef a_SHEXP_QUOTE_RECURSE
568 memset(&vic
, 0, sizeof vic
);
572 n_VISUAL_INFO_ONE_CHAR
| n_VISUAL_INFO_SKIP_ERRORS
);
574 /* xxx check whether resulting \u would be ASCII */
575 if(!(flags
& a_SHEXP_QUOTE_ROUNDTRIP
) ||
576 (flags
& a_SHEXP_QUOTE_T_DOLLAR
)){
577 #ifdef a_SHEXP_QUOTE_RECURSE
585 #ifdef a_SHEXP_QUOTE_RECURSE
586 ++sqcp
->sqc_cnt_dollar
;
588 flags
= (flags
& ~a_SHEXP_QUOTE_T_MASK
) | a_SHEXP_QUOTE_T_DOLLAR
;
594 sqlp
->sql_flags
= flags
;
596 /* Level made the great and completed processing input. Reverse the list of
597 * levels, detect the "most fancy" quote type needed along this way */
598 /* XXX Due to restriction as above very crude */
599 for(flags
= 0, il
= 0, u
.head
= NULL
; sqlp
!= NULL
;){
600 struct a_shexp_quote_lvl
*tmp
;
602 tmp
= sqlp
->sql_link
;
603 sqlp
->sql_link
= u
.head
;
605 il
+= sqlp
->sql_dat
.l
;
606 if(sqlp
->sql_flags
& a_SHEXP_QUOTE_T_MASK
)
607 il
+= (sqlp
->sql_dat
.l
>> 1);
608 flags
|= sqlp
->sql_flags
;
613 /* Finally work the substrings in the correct order, adjusting quotes along
614 * the way as necessary. Start off with the "most fancy" quote, so that
615 * the user sees an overall boundary she can orientate herself on.
616 * We do it like that to be able to give the user some "encapsulation
617 * experience", to address what strikes me is a problem of sh(1)ell quoting:
618 * different to, e.g., perl(1), where you see at a glance where a string
619 * starts and ends, sh(1) quoting occurs at the "top level", disrupting the
620 * visual appearance of "a string" as such */
621 u
.store
= n_string_reserve(sqcp
->sqc_store
, il
);
623 if(flags
& a_SHEXP_QUOTE_T_DOLLAR
){
624 u
.store
= n_string_push_buf(u
.store
, "$'", sizeof("$'") -1);
625 flags
= (flags
& ~a_SHEXP_QUOTE_T_MASK
) | a_SHEXP_QUOTE_T_DOLLAR
;
626 }else if(flags
& a_SHEXP_QUOTE_T_DOUBLE
){
627 u
.store
= n_string_push_c(u
.store
, '"');
628 flags
= (flags
& ~a_SHEXP_QUOTE_T_MASK
) | a_SHEXP_QUOTE_T_DOUBLE
;
629 }else if(flags
& a_SHEXP_QUOTE_T_SINGLE
){
630 u
.store
= n_string_push_c(u
.store
, '\'');
631 flags
= (flags
& ~a_SHEXP_QUOTE_T_MASK
) | a_SHEXP_QUOTE_T_SINGLE
;
632 }else /*if(flags & a_SHEXP_QUOTE_T_REVSOL)*/
633 flags
&= ~a_SHEXP_QUOTE_T_MASK
;
635 /* Work all the levels */
636 for(; sqlp
!= NULL
; sqlp
= sqlp
->sql_link
){
637 /* As necessary update our mode of quoting */
638 #ifdef a_SHEXP_QUOTE_RECURSE
641 switch(sqlp
->sql_flags
& a_SHEXP_QUOTE_T_MASK
){
642 case a_SHEXP_QUOTE_T_DOLLAR
:
643 if(!(flags
& a_SHEXP_QUOTE_T_DOLLAR
))
644 il
= a_SHEXP_QUOTE_T_DOLLAR
;
646 case a_SHEXP_QUOTE_T_DOUBLE
:
647 if(!(flags
& (a_SHEXP_QUOTE_T_DOUBLE
| a_SHEXP_QUOTE_T_DOLLAR
)))
648 il
= a_SHEXP_QUOTE_T_DOLLAR
;
650 case a_SHEXP_QUOTE_T_SINGLE
:
651 if(!(flags
& (a_SHEXP_QUOTE_T_REVSOL
| a_SHEXP_QUOTE_T_SINGLE
|
652 a_SHEXP_QUOTE_T_DOUBLE
| a_SHEXP_QUOTE_T_DOLLAR
)))
653 il
= a_SHEXP_QUOTE_T_SINGLE
;
656 case a_SHEXP_QUOTE_T_REVSOL
:
657 if(!(flags
& (a_SHEXP_QUOTE_T_REVSOL
| a_SHEXP_QUOTE_T_SINGLE
|
658 a_SHEXP_QUOTE_T_DOUBLE
| a_SHEXP_QUOTE_T_DOLLAR
)))
659 il
= a_SHEXP_QUOTE_T_REVSOL
;
664 if(flags
& (a_SHEXP_QUOTE_T_SINGLE
| a_SHEXP_QUOTE_T_DOLLAR
))
665 u
.store
= n_string_push_c(u
.store
, '\'');
666 else if(flags
& a_SHEXP_QUOTE_T_DOUBLE
)
667 u
.store
= n_string_push_c(u
.store
, '"');
668 flags
&= ~a_SHEXP_QUOTE_T_MASK
;
671 if(flags
& a_SHEXP_QUOTE_T_DOLLAR
)
672 u
.store
= n_string_push_buf(u
.store
, "$'", sizeof("$'") -1);
673 else if(flags
& a_SHEXP_QUOTE_T_DOUBLE
)
674 u
.store
= n_string_push_c(u
.store
, '"');
675 else if(flags
& a_SHEXP_QUOTE_T_SINGLE
)
676 u
.store
= n_string_push_c(u
.store
, '\'');
678 #endif /* a_SHEXP_QUOTE_RECURSE */
680 /* Work the level's substring */
681 ib
= sqlp
->sql_dat
.s
;
682 il
= sqlp
->sql_dat
.l
;
690 assert(c
== '\t' || (flags
& a_SHEXP_QUOTE_T_DOLLAR
));
691 assert((flags
& (a_SHEXP_QUOTE_T_REVSOL
| a_SHEXP_QUOTE_T_SINGLE
|
692 a_SHEXP_QUOTE_T_DOUBLE
| a_SHEXP_QUOTE_T_DOLLAR
)));
694 case 0x07: c
= 'a'; break;
695 case 0x08: c
= 'b'; break;
696 case 0x0A: c
= 'n'; break;
697 case 0x0B: c
= 'v'; break;
698 case 0x0C: c
= 'f'; break;
699 case 0x0D: c
= 'r'; break;
700 case 0x1B: c
= 'E'; break;
703 if(flags
& a_SHEXP_QUOTE_T_DOLLAR
){
707 if(flags
& a_SHEXP_QUOTE_T_REVSOL
)
708 u
.store
= n_string_push_c(u
.store
, '\\');
711 u
.store
= n_string_push_c(u
.store
, '\\');
713 u
.store
= n_string_push_c(u
.store
, 'c');
717 }else if(blankspacechar(c
) || c
== '|' || c
== '&' || c
== ';' ||
718 /* Whereas we don't support those, quote them for the sh(1)ell */
719 c
== '(' || c
== ')' || c
== '<' || c
== '>' ||
720 c
== '"' || c
== '$'){
721 if(flags
& (a_SHEXP_QUOTE_T_SINGLE
| a_SHEXP_QUOTE_T_DOLLAR
))
723 assert(flags
& (a_SHEXP_QUOTE_T_REVSOL
| a_SHEXP_QUOTE_T_DOUBLE
));
724 u
.store
= n_string_push_c(u
.store
, '\\');
727 if(flags
& a_SHEXP_QUOTE_T_DOUBLE
)
729 assert(!(flags
& a_SHEXP_QUOTE_T_SINGLE
));
730 u
.store
= n_string_push_c(u
.store
, '\\');
732 }else if(c
== '\\' || (c
== '#' && ib
== ib_base
)){
733 if(flags
& a_SHEXP_QUOTE_T_SINGLE
)
735 assert(flags
& (a_SHEXP_QUOTE_T_REVSOL
| a_SHEXP_QUOTE_T_DOUBLE
|
736 a_SHEXP_QUOTE_T_DOLLAR
));
737 u
.store
= n_string_push_c(u
.store
, '\\');
739 }else if(asciichar(c
)){
740 /* Shorthand: we can simply push that thing out */
742 u
.store
= n_string_push_c(u
.store
, c
);
745 /* Not an ASCII character, take care not to split up multibyte
746 * sequences etc. For the sake of compile testing, don't enwrap in
747 * HAVE_ALWAYS_UNICODE_LOCALE || HAVE_NATCH_CHAR */
748 if(n_psonce
& n_PSO_UNICODE
){
755 if((uc
= n_utf8_to_utf32(&ib2
, &il2
)) != UI32_MAX
){
759 il2
= PTR2SIZE(&ib2
[0] - &ib
[0]);
760 if((flags
& a_SHEXP_QUOTE_ROUNDTRIP
) || uc
== 0xFFFDu
){
761 /* Use padding to make ambiguities impossible */
762 il3
= snprintf(itoa
, sizeof itoa
, "\\%c%0*X",
763 (uc
> 0xFFFFu
? 'U' : 'u'),
764 (int)(uc
> 0xFFFFu
? 8 : 4), uc
);
770 u
.store
= n_string_push_buf(u
.store
, cp
, il3
);
771 ib
+= il2
, il
-= il2
;
776 memset(&vic
, 0, sizeof vic
);
780 n_VISUAL_INFO_ONE_CHAR
| n_VISUAL_INFO_SKIP_ERRORS
);
782 /* Work this substring as sensitive as possible */
784 if(!(flags
& a_SHEXP_QUOTE_ROUNDTRIP
))
785 u
.store
= n_string_push_buf(u
.store
, ib
, il
);
787 else if((vic
.vic_indat
= n_iconv_onetime_cp(n_ICONV_NONE
,
788 "utf-8", ok_vlook(ttycharset
), savestrbuf(ib
, il
))) != NULL
){
793 il3
= il2
= strlen(ib2
= vic
.vic_indat
);
794 if((uc
= n_utf8_to_utf32(&ib2
, &il2
)) != UI32_MAX
){
797 il2
= PTR2SIZE(&ib2
[0] - &vic
.vic_indat
[0]);
798 /* Use padding to make ambiguities impossible */
799 il3
= snprintf(itoa
, sizeof itoa
, "\\%c%0*X",
800 (uc
> 0xFFFFu
? 'U' : 'u'),
801 (int)(uc
> 0xFFFFu
? 8 : 4), uc
);
802 u
.store
= n_string_push_buf(u
.store
, itoa
, il3
);
812 u
.store
= n_string_push_buf(u
.store
, "\\xFF",
814 n_c_to_hex_base16(&u
.store
->s_dat
[u
.store
->s_len
- 2], *ib
++);
823 /* Close an open quote */
824 if(flags
& (a_SHEXP_QUOTE_T_SINGLE
| a_SHEXP_QUOTE_T_DOLLAR
))
825 u
.store
= n_string_push_c(u
.store
, '\'');
826 else if(flags
& a_SHEXP_QUOTE_T_DOUBLE
)
827 u
.store
= n_string_push_c(u
.store
, '"');
828 #ifdef a_SHEXP_QUOTE_RECURSE
834 #ifdef a_SHEXP_QUOTE_RECURSE
836 sqlp
->sql_dat
.l
-= il
;
839 sql
.sql_dat
.s
= n_UNCONST(ib
);
841 sql
.sql_flags
= flags
;
842 a_shexp__quote(sqcp
, &sql
);
847 #undef a_SHEXP_QUOTE_RECURSE
851 fexpand(char const *name
, enum fexp_mode fexpm
) /* TODO in parts: -> URL::!! */
854 char const *res
, *cp
;
855 bool_t dyn
, haveproto
;
858 n_pstate
&= ~n_PS_EXPAND_MULTIRESULT
;
861 /* The order of evaluation is "%" and "#" expand into constants.
862 * "&" can expand into "+". "+" can expand into shell meta characters.
863 * Shell meta characters expand into constants.
864 * This way, we make no recursive expansion */
865 if ((fexpm
& FEXP_NSHORTCUT
) || (res
= shortcut_expand(name
)) == NULL
)
866 res
= n_UNCONST(name
);
869 n_UNINIT(proto
.s
, NULL
), n_UNINIT(proto
.l
, 0);
871 for(cp
= res
; *cp
&& *cp
!= ':'; ++cp
)
874 if(cp
[0] == ':' && cp
[1] == '/' && cp
[2] == '/'){
876 proto
.s
= n_UNCONST(res
);
878 proto
.l
= PTR2SIZE(cp
- res
);
883 if(!(fexpm
& FEXP_NSPECIAL
)){
888 if(res
[1] == ':' && res
[2] != '\0'){
894 force
= (res
[1] != '\0');
895 res
= a_shexp_findmail((force
? &res
[1] : ok_vlook(LOGNAME
)),
904 if (prevfile
[0] == '\0') {
905 n_err(_("No previous file\n"));
913 res
= ok_vlook(MBOX
);
918 /* POSIX: if *folder* unset or null, "+" shall be retained */
919 if (!(fexpm
& FEXP_NFOLDER
) && *res
== '+' &&
920 *(cp
= n_folder_query()) != '\0') {
921 res
= str_concat_csvl(&s
, cp
, &res
[1], NULL
)->s
;
924 /* TODO *folder* can't start with %[:], can it!?! */
925 if (res
[0] == '%' && res
[1] == ':') {
931 /* Do some meta expansions */
932 if((fexpm
& (FEXP_NSHELL
| FEXP_NVAR
)) != FEXP_NVAR
&&
933 ((fexpm
& FEXP_NSHELL
) ? (strchr(res
, '$') != NULL
)
934 : anyof(res
, "{}[]*?$"))){
937 if(fexpm
& FEXP_NOPROTO
)
940 cp
= haveproto
? savecat(savestrbuf(proto
.s
, proto
.l
), res
) : res
;
942 switch(which_protocol(cp
, TRU1
, FAL0
, NULL
)){
955 struct n_string shou
, *shoup
;
957 shin
.s
= n_UNCONST(res
);
959 shoup
= n_string_creat_auto(&shou
);
961 enum n_shexp_state shs
;
963 /* TODO shexp: take care to not include backtick eval once avail! */
964 shs
= n_shexp_parse_token((n_SHEXP_PARSE_LOG_D_V
|
965 n_SHEXP_PARSE_QUOTE_AUTO_FIXED
| n_SHEXP_PARSE_QUOTE_AUTO_DQ
|
966 n_SHEXP_PARSE_QUOTE_AUTO_CLOSE
), shoup
, &shin
, NULL
);
967 if(shs
& n_SHEXP_STATE_STOP
)
970 res
= n_string_cp(shoup
);
971 shoup
= n_string_drop_ownership(shoup
);
975 res
= a_shexp_tilde(res
);
977 if(!(fexpm
& FEXP_NSHELL
) &&
978 (res
= a_shexp_globname(res
, fexpm
)) == NULL
)
982 }else if(res
[0] == '~'){
983 res
= a_shexp_tilde(res
);
988 if(res
!= NULL
&& haveproto
){
989 res
= savecat(savestrbuf(proto
.s
, proto
.l
), res
);
993 if(fexpm
& FEXP_LOCAL
){
994 switch (which_protocol(res
, FAL0
, FAL0
, NULL
)) {
996 case PROTO_MAILDIR
: /* Cannot happen since we don't stat(2), but.. */
999 n_err(_("Not a local file or directory: %s\n"),
1000 n_shexp_quote_cp(name
, FAL0
));
1007 if(res
!= NULL
&& !dyn
)
1010 return n_UNCONST(res
);
1013 FL
enum n_shexp_state
1014 n_shexp_parse_token(enum n_shexp_parse_flags flags
, struct n_string
*store
,
1015 struct str
*input
, void const **cookie
){
1016 /* TODO shexp_parse_token: WCHAR; $IFS (sp20=' '; echo a $sp20 b; ..) */
1017 char c2
, c
, quotec
, utf
[8];
1018 enum n_shexp_state rv
;
1020 char const *ifs
, *ifs_ws
, *ib_save
, *ib
;
1023 a_SKIPQ
= 1u<<0, /* Skip rest of this quote (\u0 ..) */
1024 a_SKIPT
= 1u<<1, /* Skip entire token (\c@) */
1025 a_SKIPMASK
= a_SKIPQ
| a_SKIPT
,
1026 a_SURPLUS
= 1u<<2, /* Extended sequence interpretation */
1027 a_NTOKEN
= 1u<<3, /* "New token": e.g., comments are possible */
1028 a_BRACE
= 1u<<4, /* Variable substitution: brace enclosed */
1029 a_DIGIT1
= 1u<<5, /* ..first character was digit */
1030 a_NONDIGIT
= 1u<<6, /* ..has seen any non-digits */
1031 a_VARSUBST_MASK
= n_BITENUM_MASK(4, 6),
1033 a_ROUND_MASK
= a_SKIPT
| (int)~n_BITENUM_MASK(0, 7),
1036 a_CONSUME
= 1u<<10, /* When done, "consume" remaining input */
1041 assert((flags
& n_SHEXP_PARSE_DRYRUN
) || store
!= NULL
);
1042 assert(input
!= NULL
);
1043 assert(input
->l
== 0 || input
->s
!= NULL
);
1044 assert(!(flags
& n_SHEXP_PARSE_LOG
) || !(flags
& n_SHEXP_PARSE_LOG_D_V
));
1045 assert(!(flags
& n_SHEXP_PARSE_IFS_ADD_COMMA
) ||
1046 !(flags
& n_SHEXP_PARSE_IFS_IS_COMMA
));
1047 assert(!(flags
& n_SHEXP_PARSE_QUOTE_AUTO_FIXED
) ||
1048 (flags
& n__SHEXP_PARSE_QUOTE_AUTO_MASK
));
1050 if((flags
& n_SHEXP_PARSE_LOG_D_V
) && (n_poption
& n_PO_D_V
))
1051 flags
|= n_SHEXP_PARSE_LOG
;
1052 if(flags
& n_SHEXP_PARSE_QUOTE_AUTO_FIXED
)
1053 flags
|= n_SHEXP_PARSE_QUOTE_AUTO_CLOSE
;
1055 if((flags
& n_SHEXP_PARSE_TRUNC
) && store
!= NULL
)
1056 store
= n_string_trunc(store
, 0);
1058 if(flags
& n_SHEXP_PARSE_IFS_VAR
){
1059 ifs
= ok_vlook(ifs
);
1060 ifs_ws
= ok_vlook(ifs_ws
);
1065 if((il
= input
->l
) == UIZ_MAX
)
1066 input
->l
= il
= strlen(ib
);
1069 if(cookie
!= NULL
&& *cookie
!= NULL
){
1070 assert(!(flags
& n_SHEXP_PARSE_DRYRUN
));
1075 rv
= n_SHEXP_STATE_NONE
;
1076 state
&= a_ROUND_MASK
;
1078 /* In cookie mode, the next ARGV entry is the token already, unchanged,
1079 * since it has already been expanded before! */
1080 if(state
& a_COOKIE
){
1081 char const * const *xcookie
, *cp
;
1085 if((store
= n_string_push_cp(store
, *xcookie
))->s_len
> 0)
1086 rv
|= n_SHEXP_STATE_OUTPUT
;
1087 if(*++xcookie
== NULL
){
1090 flags
|= n_SHEXP_PARSE_QUOTE_AUTO_DQ
; /* ..why we are here! */
1092 *cookie
= n_UNCONST(xcookie
);
1094 for(cp
= &n_string_cp(store
)[i
]; (c
= *cp
++) != '\0';)
1096 rv
|= n_SHEXP_STATE_CONTROL
;
1100 /* The last exploded cookie will join with the yielded input token, so
1101 * simply fall through in this case */
1102 if(state
& a_COOKIE
)
1106 if(flags
& n_SHEXP_PARSE_TRIMSPACE
){
1107 if(flags
& n_SHEXP_PARSE_IFS_VAR
){
1108 for(; il
> 0; ++ib
, --il
)
1109 if(strchr(ifs_ws
, *ib
) == NULL
)
1112 for(; il
> 0; ++ib
, --il
)
1113 if(!blankspacechar(*ib
))
1117 input
->s
= n_UNCONST(ib
);
1122 rv
|= n_SHEXP_STATE_STOP
;
1127 store
= n_string_reserve(store
, n_MIN(il
, 32)); /* XXX */
1129 switch(flags
& n__SHEXP_PARSE_QUOTE_AUTO_MASK
){
1130 case n_SHEXP_PARSE_QUOTE_AUTO_SQ
:
1133 case n_SHEXP_PARSE_QUOTE_AUTO_DQ
:
1136 case n_SHEXP_PARSE_QUOTE_AUTO_DSQ
:
1150 /* If no quote-mode active.. */
1152 if(c
== '"' || c
== '\''){
1157 state
&= ~a_SURPLUS
;
1171 }else if(c
== '\\'){
1172 /* Outside of quotes this just escapes any next character, but a sole
1173 * <reverse solidus> at EOS is left unchanged */
1178 /* A comment may it be if no token has yet started */
1179 else if(c
== '#' && (state
& a_NTOKEN
)){
1180 rv
|= n_SHEXP_STATE_STOP
;
1183 /* Metacharacters which separate tokens must be turned on explicitly */
1185 rv
|= n_SHEXP_STATE_META_VERTBAR
;
1186 /* The parsed sequence may be _the_ output, so ensure we don't
1187 * include the metacharacter, then. */
1188 /*if(flags & n_SHEXP_PARSE_META_VERTBAR)*/
1189 if(flags
& (n_SHEXP_PARSE_DRYRUN
| n_SHEXP_PARSE_META_KEEP
))
1193 rv
|= n_SHEXP_STATE_META_AMPERSAND
;
1194 /* The parsed sequence may be _the_ output, so ensure we don't
1195 * include the metacharacter, then. */
1196 /*if(flags & n_SHEXP_PARSE_META_AMPERSAND)*/
1197 if(flags
& (n_SHEXP_PARSE_DRYRUN
| n_SHEXP_PARSE_META_KEEP
))
1201 rv
|= n_SHEXP_STATE_META_SEMICOLON
;
1202 /* The parsed sequence may be _the_ output, so ensure we don't
1203 * include the metacharacter, then. */
1204 if(flags
& n_SHEXP_PARSE_META_SEMICOLON
){
1206 n_go_input_inject(n_GO_INPUT_INJECT_COMMIT
, ib
, il
);
1208 rv
|= n_SHEXP_STATE_STOP
;
1210 if(flags
& (n_SHEXP_PARSE_DRYRUN
| n_SHEXP_PARSE_META_KEEP
))
1213 }else if(c
== ',' && (flags
&
1214 (n_SHEXP_PARSE_IFS_ADD_COMMA
| n_SHEXP_PARSE_IFS_IS_COMMA
))){
1215 /* The parsed sequence may be _the_ output, so ensure we don't
1216 * include the metacharacter, then. */
1217 if(flags
& (n_SHEXP_PARSE_DRYRUN
| n_SHEXP_PARSE_META_KEEP
))
1220 }else if((!(flags
& n_SHEXP_PARSE_IFS_VAR
) && blankchar(c
)) ||
1221 ((flags
& n_SHEXP_PARSE_IFS_VAR
) && strchr(ifs
, c
) != NULL
)){
1222 if(!(flags
& n_SHEXP_PARSE_IFS_IS_COMMA
)){
1223 /* The parsed sequence may be _the_ output, so ensure we don't
1224 * include the metacharacter, then. */
1225 if(flags
& (n_SHEXP_PARSE_DRYRUN
| n_SHEXP_PARSE_META_KEEP
))
1234 assert(!(state
& a_NTOKEN
));
1235 if(c
== quotec
&& !(flags
& n_SHEXP_PARSE_QUOTE_AUTO_FIXED
)){
1236 state
&= a_ROUND_MASK
;
1238 /* Users may need to recognize the presence of empty quotes */
1239 rv
|= n_SHEXP_STATE_OUTPUT
;
1241 }else if(c
== '\\' && (state
& a_SURPLUS
)){
1243 /* A sole <reverse solidus> at EOS is treated as-is! This is ok
1244 * since the "closing quote" error will occur next, anyway */
1247 else if((c2
= *ib
) == quotec
){
1250 }else if(quotec
== '"'){
1251 /* Double quotes, POSIX says:
1252 * The <backslash> shall retain its special meaning as an
1253 * escape character (see Section 2.2.1) only when followed
1254 * by one of the following characters when considered
1255 * special: $ ` " \ <newline> */
1259 /* case '"': already handled via c2 == quotec */
1268 /* Dollar-single-quote */
1272 /* case '\'': already handled via c2 == quotec */
1277 case 'b': c
= '\b'; break;
1278 case 'f': c
= '\f'; break;
1279 case 'n': c
= '\n'; break;
1280 case 'r': c
= '\r'; break;
1281 case 't': c
= '\t'; break;
1282 case 'v': c
= '\v'; break;
1285 case 'e': c
= '\033'; break;
1287 /* Control character */
1290 goto j_dollar_ungetc
;
1292 if(state
& a_SKIPMASK
)
1294 c
= upperconv(c2
) ^ 0x40;
1295 if((ui8_t
)c
> 0x1F && c
!= 0x7F){ /* ASCII C0: 0..1F, 7F */
1296 if(flags
& n_SHEXP_PARSE_LOG
)
1297 n_err(_("Invalid \\c notation: %.*s\n"),
1298 (int)input
->l
, input
->s
);
1299 rv
|= n_SHEXP_STATE_ERR_CONTROL
;
1301 /* As an implementation-defined extension, support \c@
1302 * EQ printf(1) alike \c */
1309 /* Octal sequence: 1 to 3 octal bytes */
1311 /* As an extension (dependent on where you look, echo(1), or
1312 * awk(1)/tr(1) etc.), allow leading "0" octal indicator */
1313 if(il
> 0 && (c
= *ib
) >= '0' && c
<= '7'){
1318 case '1': case '2': case '3':
1319 case '4': case '5': case '6': case '7':
1321 if(il
> 0 && (c
= *ib
) >= '0' && c
<= '7'){
1322 c2
= (c2
<< 3) | (c
- '0');
1325 if(il
> 0 && (c
= *ib
) >= '0' && c
<= '7'){
1326 if(!(state
& a_SKIPMASK
) && (ui8_t
)c2
> 0x1F){
1327 if(flags
& n_SHEXP_PARSE_LOG
)
1328 n_err(_("\\0 argument exceeds a byte: %.*s\n"),
1329 (int)input
->l
, input
->s
);
1330 rv
|= n_SHEXP_STATE_ERR_NUMBER
;
1332 /* Write unchanged */
1334 rv
|= n_SHEXP_STATE_OUTPUT
;
1335 if(!(flags
& n_SHEXP_PARSE_DRYRUN
))
1336 store
= n_string_push_buf(store
, ib_save
,
1337 PTR2SIZE(ib
- ib_save
));
1340 c2
= (c2
<< 3) | (c
-= '0');
1343 if(state
& a_SKIPMASK
)
1345 if((c
= c2
) == '\0'){
1351 /* ISO 10646 / Unicode sequence, 8 or 4 hexadecimal bytes */
1360 goto j_dollar_ungetc
;
1364 /* Hexadecimal sequence, 1 or 2 hexadecimal bytes */
1368 goto j_dollar_ungetc
;
1372 static ui8_t
const hexatoi
[] = { /* XXX uses ASCII */
1373 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15
1378 for(no
= j
= 0; i
-- > 0; --il
, ++ib
, ++j
){
1382 no
+= hexatoi
[(ui8_t
)((c
) - ((c
) <= '9' ? 48
1383 : ((c
) <= 'F' ? 55 : 87)))];
1385 if(state
& a_SKIPMASK
)
1387 c2
= (c2
== 'U' || c2
== 'u') ? 'u' : 'x';
1388 if(flags
& n_SHEXP_PARSE_LOG
)
1389 n_err(_("Invalid \\%c notation: %.*s\n"),
1390 c2
, (int)input
->l
, input
->s
);
1391 rv
|= n_SHEXP_STATE_ERR_NUMBER
;
1397 /* Unicode massage */
1398 if((c2
!= 'U' && c2
!= 'u') || n_uasciichar(no
)){
1399 if((c
= (char)no
) == '\0')
1403 else if(!(state
& a_SKIPMASK
)){
1404 if(!(flags
& n_SHEXP_PARSE_DRYRUN
))
1405 store
= n_string_reserve(store
, n_MAX(j
, 4));
1408 if(no
> 0x10FFFF){ /* XXX magic; CText */
1409 if(flags
& n_SHEXP_PARSE_LOG
)
1410 n_err(_("\\U argument exceeds 0x10FFFF: %.*s\n"),
1411 (int)input
->l
, input
->s
);
1412 rv
|= n_SHEXP_STATE_ERR_NUMBER
;
1413 /* But normalize the output anyway */
1417 j
= n_utf32_to_utf8(no
, utf
);
1419 if(n_psonce
& n_PSO_UNICODE
){
1420 rv
|= n_SHEXP_STATE_OUTPUT
| n_SHEXP_STATE_UNICODE
;
1421 if(!(flags
& n_SHEXP_PARSE_DRYRUN
))
1422 store
= n_string_push_buf(store
, utf
, j
);
1429 icp
= n_iconv_onetime_cp(n_ICONV_NONE
,
1432 rv
|= n_SHEXP_STATE_OUTPUT
;
1433 if(!(flags
& n_SHEXP_PARSE_DRYRUN
))
1434 store
= n_string_push_cp(store
, icp
);
1439 if(!(flags
& n_SHEXP_PARSE_DRYRUN
)) Je_uni_norm
:{
1442 rv
|= n_SHEXP_STATE_OUTPUT
|
1443 n_SHEXP_STATE_ERR_UNICODE
;
1444 i
= snprintf(itoa
, sizeof itoa
, "\\%c%0*X",
1445 (no
> 0xFFFFu
? 'U' : 'u'),
1446 (int)(no
> 0xFFFFu
? 8 : 4), (ui32_t
)no
);
1447 store
= n_string_push_buf(store
, itoa
, i
);
1451 if(state
& a_SKIPMASK
)
1456 /* Extension: \$ can be used to expand a variable.
1457 * Bug|ad effect: if conversion fails, not written "as-is" */
1460 goto j_dollar_ungetc
;
1465 /* Follow bash(1) behaviour, print sequence unchanged */
1470 }else if(c
== '$' && quotec
== '"' && il
> 0) J_var_expand
:{
1471 state
&= ~a_VARSUBST_MASK
;
1475 if(!(state
& a_BRACE
) || il
> 1){
1476 char const *cp
, *vp
;
1482 state
&= ~a_EXPLODE
;
1484 for(i
= 0; il
> 0; --il
, ++ib
, ++i
){
1485 /* We have some special cases regarding macro-local special
1486 * parameters, so ensure these don't cause failure.
1487 * This has counterparts in the code that manages internal
1490 if(!a_SHEXP_ISVARC(c
)){
1491 if(i
== 0 && (c
== '*' || c
== '@' || c
== '#' ||
1492 c
== '?' || c
== '!' || c
== '^')){
1493 /* Skip over multiplexer */
1504 }else if(a_SHEXP_ISVARC_BAD1ST(c
)){
1508 state
|= a_NONDIGIT
;
1511 if(state
& a_SKIPMASK
){
1512 if((state
& a_BRACE
) && il
> 0 && *ib
== '}')
1517 /* XXX Digit in first place is not supported, however we do
1518 * XXX support all digits because these refer to macro-local
1519 * XXX variables; if we would have a notion of whether we're in
1520 * XXX a macro this could be made more fine grained */
1521 if((state
& (a_DIGIT1
| a_NONDIGIT
)) == (a_DIGIT1
| a_NONDIGIT
)){
1522 if(state
& a_BRACE
){
1523 if(il
> 0 && *ib
== '}')
1526 rv
|= n_SHEXP_STATE_ERR_BRACE
;
1528 if(flags
& n_SHEXP_PARSE_LOG
)
1529 n_err(_("Invalid identifier for ${}: %.*s\n"),
1530 (int)input
->l
, input
->s
);
1531 rv
|= n_SHEXP_STATE_ERR_IDENTIFIER
;
1534 if(state
& a_BRACE
){
1535 if(flags
& n_SHEXP_PARSE_LOG
)
1536 n_err(_("Bad substitution for ${}: %.*s\n"),
1537 (int)input
->l
, input
->s
);
1538 rv
|= n_SHEXP_STATE_ERR_BADSUB
;
1539 if(il
> 0 && *ib
== '}')
1542 rv
|= n_SHEXP_STATE_ERR_BRACE
;
1547 if(state
& a_BRACE
){
1548 if(il
== 0 || *ib
!= '}'){
1549 if(flags
& n_SHEXP_PARSE_LOG
)
1550 n_err(_("No closing brace for ${}: %.*s\n"),
1551 (int)input
->l
, input
->s
);
1552 rv
|= n_SHEXP_STATE_ERR_QUOTEOPEN
|
1553 n_SHEXP_STATE_ERR_BRACE
;
1559 if(flags
& n_SHEXP_PARSE_DRYRUN
)
1562 /* We may shall explode "${@}" to a series of successive,
1563 * properly quoted tokens (instead). The first exploded
1564 * cookie will join with the current token */
1565 if((state
& a_EXPLODE
) && !(flags
& n_SHEXP_PARSE_DRYRUN
) &&
1566 cookie
!= NULL
&& n_var_vexplode(cookie
)){
1568 input
->s
= n_UNCONST(ib
);
1570 goto jrestart_empty
;
1573 /* Check getenv(3) shall no internal variable exist!
1574 * XXX We have some common idioms, avoid memory for them
1575 * XXX Even better would be var_vlook_buf()! */
1578 case '?': vp
= n_qm
; break;
1579 case '!': vp
= n_em
; break;
1580 case '*': vp
= n_star
; break;
1581 case '@': vp
= n_at
; break;
1582 case '#': vp
= n_ns
; break;
1583 default: goto j_var_look_buf
;
1587 vp
= savestrbuf(vp
, i
);
1589 if((cp
= n_var_vlook(vp
, TRU1
)) != NULL
){
1590 rv
|= n_SHEXP_STATE_OUTPUT
;
1591 store
= n_string_push_cp(store
, cp
);
1592 for(; (c
= *cp
) != '\0'; ++cp
)
1594 rv
|= n_SHEXP_STATE_CONTROL
;
1601 }else if(c
== '`' && quotec
== '"' && il
> 0){ /* TODO shell command */
1606 if(!(state
& a_SKIPMASK
)){
1607 rv
|= n_SHEXP_STATE_OUTPUT
;
1609 rv
|= n_SHEXP_STATE_CONTROL
;
1610 if(!(flags
& n_SHEXP_PARSE_DRYRUN
))
1611 store
= n_string_push_c(store
, c
);
1615 if(quotec
!= '\0' && !(flags
& n_SHEXP_PARSE_QUOTE_AUTO_CLOSE
)){
1616 if(flags
& n_SHEXP_PARSE_LOG
)
1617 n_err(_("No closing quote: %.*s\n"), (int)input
->l
, input
->s
);
1618 rv
|= n_SHEXP_STATE_ERR_QUOTEOPEN
;
1622 assert(!(state
& a_COOKIE
));
1623 if((flags
& n_SHEXP_PARSE_DRYRUN
) && store
!= NULL
){
1624 store
= n_string_push_buf(store
, input
->s
, PTR2SIZE(ib
- input
->s
));
1625 rv
|= n_SHEXP_STATE_OUTPUT
;
1628 if(state
& a_CONSUME
){
1629 input
->s
= n_UNCONST(&ib
[il
]);
1632 if(flags
& n_SHEXP_PARSE_TRIMSPACE
){
1633 if(flags
& n_SHEXP_PARSE_IFS_VAR
){
1634 for(; il
> 0; ++ib
, --il
)
1635 if(strchr(ifs_ws
, *ib
) == NULL
)
1638 for(; il
> 0; ++ib
, --il
)
1644 input
->s
= n_UNCONST(ib
);
1647 if(!(rv
& n_SHEXP_STATE_STOP
)){
1648 if(!(rv
& n_SHEXP_STATE_OUTPUT
) && (flags
& n_SHEXP_PARSE_IGNORE_EMPTY
) &&
1650 goto jrestart_empty
;
1651 if(/*!(rv & n_SHEXP_STATE_OUTPUT) &&*/ il
== 0)
1652 rv
|= n_SHEXP_STATE_STOP
;
1655 if((state
& a_SKIPT
) && !(rv
& n_SHEXP_STATE_STOP
) &&
1656 (flags
& n__SHEXP_PARSE_META_MASK
))
1659 assert((rv
& n_SHEXP_STATE_OUTPUT
) || !(rv
& n_SHEXP_STATE_UNICODE
));
1660 assert((rv
& n_SHEXP_STATE_OUTPUT
) || !(rv
& n_SHEXP_STATE_CONTROL
));
1666 n_shexp_parse_token_cp(enum n_shexp_parse_flags flags
, char const **cp
){
1668 struct n_string sou
, *soup
;
1670 enum n_shexp_state shs
;
1675 input
.s
= n_UNCONST(*cp
);
1677 soup
= n_string_creat_auto(&sou
);
1679 shs
= n_shexp_parse_token(flags
, soup
, &input
, NULL
);
1680 if(shs
& n_SHEXP_STATE_ERR_MASK
){
1681 soup
= n_string_assign_cp(soup
, *cp
);
1686 rv
= n_string_cp(soup
);
1687 /*n_string_gut(n_string_drop_ownership(soup));*/
1692 FL
struct n_string
*
1693 n_shexp_quote(struct n_string
*store
, struct str
const *input
, bool_t rndtrip
){
1694 struct a_shexp_quote_lvl sql
;
1695 struct a_shexp_quote_ctx sqc
;
1698 assert(store
!= NULL
);
1699 assert(input
!= NULL
);
1700 assert(input
->l
== 0 || input
->s
!= NULL
);
1702 memset(&sqc
, 0, sizeof sqc
);
1703 sqc
.sqc_store
= store
;
1704 sqc
.sqc_input
.s
= input
->s
;
1705 if((sqc
.sqc_input
.l
= input
->l
) == UIZ_MAX
)
1706 sqc
.sqc_input
.l
= strlen(input
->s
);
1707 sqc
.sqc_flags
= rndtrip
? a_SHEXP_QUOTE_ROUNDTRIP
: a_SHEXP_QUOTE_NONE
;
1709 if(sqc
.sqc_input
.l
== 0)
1710 store
= n_string_push_buf(store
, "''", sizeof("''") -1);
1712 memset(&sql
, 0, sizeof sql
);
1713 sql
.sql_dat
= sqc
.sqc_input
;
1714 sql
.sql_flags
= sqc
.sqc_flags
;
1715 a_shexp__quote(&sqc
, &sql
);
1722 n_shexp_quote_cp(char const *cp
, bool_t rndtrip
){
1723 struct n_string store
;
1730 input
.s
= n_UNCONST(cp
);
1732 rv
= n_string_cp(n_shexp_quote(n_string_creat_auto(&store
), &input
,
1734 n_string_gut(n_string_drop_ownership(&store
));
1740 n_shexp_is_valid_varname(char const *name
){
1747 for(lc
= '\0'; (c
= *name
++) != '\0'; lc
= c
)
1748 if(!a_SHEXP_ISVARC(c
))
1750 else if(lc
== '\0' && a_SHEXP_ISVARC_BAD1ST(c
))
1752 if(a_SHEXP_ISVARC_BADNST(lc
))
1764 struct n_string sou_b
, *soup
;
1768 char const **argv
, *varname
, *act
, *cp
;
1770 soup
= n_string_creat_auto(&sou_b
);
1772 varname
= (n_pstate
& n_PS_ARGMOD_VPUT
) ? *argv
++ : NULL
;
1775 for(cp
= act
; *cp
!= '\0' && !blankspacechar(*cp
); ++cp
)
1777 if((norndtrip
= (*act
== '+')))
1781 alen
= PTR2SIZE(cp
- act
);
1785 in
.l
= strlen(in
.s
= n_UNCONST(cp
));
1788 if(is_ascncaseprefix(act
, "encode", alen
))
1789 soup
= n_shexp_quote(soup
, &in
, !norndtrip
);
1790 else if(!norndtrip
&& is_ascncaseprefix(act
, "decode", alen
)){
1792 enum n_shexp_state shs
;
1794 shs
= n_shexp_parse_token((n_SHEXP_PARSE_LOG
|
1795 n_SHEXP_PARSE_IGNORE_EMPTY
), soup
, &in
, NULL
);
1796 if(shs
& n_SHEXP_STATE_ERR_MASK
){
1797 soup
= n_string_assign_cp(soup
, cp
);
1798 nerrn
= n_ERR_CANCELED
;
1802 if(shs
& n_SHEXP_STATE_STOP
)
1809 if(varname
!= NULL
){
1810 cp
= n_string_cp(soup
);
1811 if(!n_var_vset(varname
, (uintptr_t)cp
)){
1812 nerrn
= n_ERR_NOTSUP
;
1818 in
.s
= n_string_cp(soup
);
1820 makeprint(&in
, &out
);
1821 if(fprintf(n_stdout
, "%s\n", out
.s
) < 0){
1829 n_pstate_err_no
= nerrn
;
1831 return (cp
!= NULL
? 0 : 1);
1833 n_err(_("Synopsis: shcodec: <[+]e[ncode]|d[ecode]> <rest-of-line>\n"));
1834 nerrn
= n_ERR_INVAL
;