1 /*@ S-nail - a mail user agent derived from Berkeley Mail.
2 *@ Command input, lexing and evaluation, resource file loading and `source'ing.
3 *@ TODO PS_ROBOT requires yet PS_SOURCING, which REALLY sucks.
4 *@ TODO Commands and ghosts deserve a hashmap. Or so.
6 * Copyright (c) 2000-2004 Gunnar Ritter, Freiburg i. Br., Germany.
7 * Copyright (c) 2012 - 2016 Steffen (Daode) Nurpmeso <steffen@sdaoden.eu>.
10 * Copyright (c) 1980, 1993
11 * The Regents of the University of California. All rights reserved.
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its contributors
22 * may be used to endorse or promote products derived from this software
23 * without specific prior written permission.
25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 #define n_FILE lex_input
40 #ifndef HAVE_AMALGAMATION
44 enum a_lex_input_flags
{
46 a_LEX_FREE
= 1<<0, /* Structure was allocated, free() it */
47 a_LEX_PIPE
= 1<<1, /* Open on a pipe */
48 a_LEX_MACRO
= 1<<2, /* Running a macro */
49 a_LEX_MACRO_FREE_DATA
= 1<<3, /* Lines are allocated, free(3) once done */
50 a_LEX_MACRO_X_OPTION
= 1<<4, /* Macro indeed command line -X option */
51 a_LEX_MACRO_CMD
= 1<<5, /* Macro indeed single-line: ~:COMMAND */
53 a_LEX_SUPER_MACRO
= 1<<16 /* *Not* inheriting PS_SOURCING state */
57 char const *lc_name
; /* Name of command */
58 int (*lc_func
)(void*); /* Implementor of command */
59 enum argtype lc_argtype
; /* Arglist type (see below) */
60 si16_t lc_msgflag
; /* Required flags of msgs */
61 si16_t lc_msgmask
; /* Relevant flags of msgs */
62 #ifdef HAVE_DOCSTRINGS
63 char const *lc_doc
; /* One line doc for command */
66 /* Yechh, can't initialize unions */
67 #define lc_minargs lc_msgflag /* Minimum argcount for RAWLIST */
68 #define lc_maxargs lc_msgmask /* Max argcount for RAWLIST */
71 struct a_lex_ghost
*lg_next
;
72 struct str lg_cmd
; /* Data follows after .lg_name */
73 char lg_name
[n_VFIELD_SIZE(0)];
76 struct a_lex_eval_ctx
{
77 struct str le_line
; /* The terminated data to _evaluate() */
78 ui32_t le_line_size
; /* May be used to store line memory size */
79 bool_t le_is_recursive
; /* Evaluation in evaluation? (collect ~:) */
81 bool_t le_add_history
; /* Add command to history (TRUM1=gabby)? */
82 char const *le_new_content
; /* History: reenter line, start with this */
85 struct a_lex_input_stack
{
86 struct a_lex_input_stack
*li_outer
;
87 FILE *li_file
; /* File we were in */
88 void *li_cond
; /* Saved state of conditional stack */
89 ui32_t li_flags
; /* enum a_lex_input_flags */
90 ui32_t li_loff
; /* Pseudo (macro): index in .li_lines */
91 char **li_lines
; /* Pseudo content, lines unfolded */
92 char li_autorecmem
[n_MEMORY_AUTOREC_TYPE_SIZEOF
];
93 char li_name
[n_VFIELD_SIZE(0)]; /* Name of file or macro */
95 n_CTA(n_MEMORY_AUTOREC_TYPE_SIZEOF
% sizeof(void*) == 0,
96 "Inacceptible size of structure buffer");
98 static sighandler_type a_lex_oldpipe
;
99 static struct a_lex_ghost
*a_lex_ghosts
;
100 /* a_lex_cmd_tab[] after fun protos */
103 static struct a_lex_input_stack
*a_lex_input
;
105 /* Isolate the command from the arguments */
106 static char *a_lex_isolate(char const *comm
);
108 /* Command ghost handling */
109 static int a_lex_c_ghost(void *v
);
110 static int a_lex_c_unghost(void *v
);
112 /* Print a list of all commands */
113 static int a_lex_c_list(void *v
);
115 static int a_lex__pcmd_cmp(void const *s1
, void const *s2
);
117 /* `help' / `?' command */
118 static int a_lex_c_help(void *v
);
121 static int a_lex_c_quit(void *v
);
123 /* Print the binaries version number */
124 static int a_lex_c_version(void *v
);
126 static int a_lex__version_cmp(void const *s1
, void const *s2
);
128 /* PS_STATE_PENDMASK requires some actions */
129 static void a_lex_update_pstate(void);
131 /* Evaluate a single command.
132 * .le_add_history and .le_new_content will be updated upon success.
133 * Command functions return 0 for success, 1 for error, and -1 for abort.
134 * 1 or -1 aborts a load or source, a -1 aborts the interactive command loop */
135 static int a_lex_evaluate(struct a_lex_eval_ctx
*evp
);
137 /* Get first-fit, or NULL */
138 static struct a_lex_cmd
const *a_lex__firstfit(char const *comm
);
140 /* Branch here on hangup signal and simulate "exit" */
141 static void a_lex_hangup(int s
);
143 /* The following gets called on receipt of an interrupt. Close all open files
144 * except 0, 1, 2, and the temporary. Also, unstack all source files */
145 static void a_lex_onintr(int s
);
147 /* Pop the current input back to the previous level. Update the program state.
148 * If the argument is TRUM1 then we don't alert and error out if the stack
149 * doesn't exist at all */
150 static void a_lex_unstack(bool_t eval_error
);
152 /* `source' and `source_if' (if silent_error: no pipes allowed, then) */
153 static bool_t
a_lex_source_file(char const *file
, bool_t silent_error
);
155 /* System resource file load()ing or -X command line option array traversal */
156 static bool_t
a_lex_load(struct a_lex_input_stack
*lip
);
158 /* A simplified command loop for recursed state machines */
159 static bool_t
a_commands_recursive(enum n_lexinput_flags lif
);
161 /* List of all commands, and list of commands which are specially treated
162 * and deduced in _evaluate(), but we need a list for _c_list() and
163 * print_comm_docstr() */
164 #ifdef HAVE_DOCSTRINGS
169 static struct a_lex_cmd
const a_lex_cmd_tab
[] = {
172 a_lex_special_cmd_tab
[] = {
174 DS(N_("Comment command: ignore remaining (continuable) line")) },
176 DS(N_("Print out the preceding message")) }
181 a_lex_isolate(char const *comm
){
183 while(*comm
!= '\0' &&
184 strchr("~|? \t0123456789&%@$^.:/-+*'\",;(`", *comm
) == NULL
)
187 return n_UNCONST(comm
);
191 a_lex_c_ghost(void *v
){
192 struct a_lex_ghost
*lgp
, *gp
;
204 if((fp
= Ftmp(NULL
, "ghost", OF_RDWR
| OF_UNLINK
| OF_REGISTER
)) == NULL
)
207 for(i
= 0, gp
= a_lex_ghosts
; gp
!= NULL
; gp
= gp
->lg_next
)
208 fprintf(fp
, "wysh ghost %s %s\n",
209 gp
->lg_name
, n_shexp_quote_cp(gp
->lg_cmd
.s
, TRU1
));
212 page_or_print(fp
, i
);
218 /* Verify the ghost name is a valid one */
219 if(*argv
[0] == '\0' || *a_lex_isolate(argv
[0]) != '\0'){
220 n_err(_("`ghost': can't canonicalize %s\n"),
221 n_shexp_quote_cp(argv
[0], FAL0
));
226 /* Show command of single ghost? */
228 for(gp
= a_lex_ghosts
; gp
!= NULL
; gp
= gp
->lg_next
)
229 if(!strcmp(argv
[0], gp
->lg_name
)){
230 printf("wysh ghost %s %s\n",
231 gp
->lg_name
, n_shexp_quote_cp(gp
->lg_cmd
.s
, TRU1
));
234 n_err(_("`ghost': no such alias: %s\n"), argv
[0]);
239 /* Define command for ghost: verify command content */
240 for(cl
= 0, i
= 1; (cp
= n_UNCONST(argv
[i
])) != NULL
; ++i
)
242 cl
+= strlen(cp
) +1; /* SP or NUL */
244 n_err(_("`ghost': empty command arguments after %s\n"), argv
[0]);
249 /* If the ghost already exists, recreate */
250 for(lgp
= NULL
, gp
= a_lex_ghosts
; gp
!= NULL
; lgp
= gp
, gp
= gp
->lg_next
)
251 if(!strcmp(gp
->lg_name
, argv
[0])){
253 lgp
->lg_next
= gp
->lg_next
;
255 a_lex_ghosts
= gp
->lg_next
;
260 nl
= strlen(argv
[0]) +1;
261 gp
= smalloc(sizeof(*gp
) - n_VFIELD_SIZEOF(struct a_lex_ghost
, lg_name
) +
263 gp
->lg_next
= a_lex_ghosts
;
265 memcpy(gp
->lg_name
, argv
[0], nl
);
266 cp
= gp
->lg_cmd
.s
= gp
->lg_name
+ nl
;
269 while(*++argv
!= NULL
)
270 if((i
= strlen(*argv
)) > 0){
271 memcpy(cp
, *argv
, i
);
282 a_lex_c_unghost(void *v
){
283 struct a_lex_ghost
*lgp
, *gp
;
284 char const **argv
, *cp
;
291 while((cp
= *argv
++) != NULL
){
292 if(cp
[0] == '*' && cp
[1] == '\0'){
293 while((gp
= a_lex_ghosts
) != NULL
){
294 a_lex_ghosts
= gp
->lg_next
;
298 for(lgp
= NULL
, gp
= a_lex_ghosts
; gp
!= NULL
;
299 lgp
= gp
, gp
= gp
->lg_next
)
300 if(!strcmp(gp
->lg_name
, cp
)){
302 lgp
->lg_next
= gp
->lg_next
;
304 a_lex_ghosts
= gp
->lg_next
;
308 n_err(_("`unghost': no such alias: %s\n"),
309 n_shexp_quote_cp(cp
, FAL0
));
319 a_lex_c_list(void *v
){
321 struct a_lex_cmd
const **cpa
, *cp
, **cursor
;
325 i
= n_NELEM(a_lex_cmd_tab
) + n_NELEM(a_lex_special_cmd_tab
) +1;
326 cpa
= salloc(sizeof(cp
) * i
);
328 for(i
= 0; i
< n_NELEM(a_lex_cmd_tab
); ++i
)
329 cpa
[i
] = &a_lex_cmd_tab
[i
];
333 for(j
= 0; j
< n_NELEM(a_lex_special_cmd_tab
); ++i
, ++j
)
334 cpa
[i
] = &a_lex_special_cmd_tab
[j
];
342 qsort(cpa
, i
, sizeof(xcp
), &a_lex__pcmd_cmp
);
345 if((fp
= Ftmp(NULL
, "list", OF_RDWR
| OF_UNLINK
| OF_REGISTER
)) == NULL
)
348 fprintf(fp
, _("Commands are:\n"));
350 for(i
= 0, cursor
= cpa
; (cp
= *cursor
++) != NULL
;){
351 if(cp
->lc_func
== &c_cmdnotsupp
)
353 if(options
& OPT_D_V
){
356 switch(cp
->lc_argtype
& ARG_ARGMASK
){
357 case ARG_MSGLIST
: argt
= N_("message-list"); break;
358 case ARG_STRLIST
: argt
= N_("a \"string\""); break;
359 case ARG_RAWLIST
: argt
= N_("old-style quoting"); break;
360 case ARG_NOLIST
: argt
= N_("no arguments"); break;
361 case ARG_NDMLIST
: argt
= N_("message-list (without a default)"); break;
362 case ARG_WYSHLIST
: argt
= N_("sh(1)ell-style quoting"); break;
363 default: argt
= N_("`wysh' for sh(1)ell-style quoting"); break;
365 #ifdef HAVE_DOCSTRINGS
366 fprintf(fp
, _("`%s'. Argument type: %s.\n\t%s\n"),
367 cp
->lc_name
, V_(argt
), V_(cp
->lc_doc
));
370 fprintf(fp
, "`%s' (%s)\n", cp
->lc_name
, argt
);
374 size_t j
= strlen(cp
->lc_name
) + 2;
381 fprintf(fp
, (*cursor
!= NULL
? "%s, " : "%s\n"), cp
->lc_name
);
386 page_or_print(fp
, l
);
394 a_lex__pcmd_cmp(void const *s1
, void const *s2
){
395 struct a_lex_cmd
const * const *cp1
, * const *cp2
;
401 rv
= strcmp((*cp1
)->lc_name
, (*cp2
)->lc_name
);
407 a_lex_c_help(void *v
){
412 /* Help for a single command? */
413 if((arg
= *(char**)v
) != NULL
){
414 struct a_lex_ghost
const *gp
;
415 struct a_lex_cmd
const *cp
, *cpmax
;
417 /* Ghosts take precedence */
418 for(gp
= a_lex_ghosts
; gp
!= NULL
; gp
= gp
->lg_next
)
419 if(!strcmp(arg
, gp
->lg_name
)){
420 printf("%s -> ", arg
);
425 cpmax
= &(cp
= a_lex_cmd_tab
)[n_NELEM(a_lex_cmd_tab
)];
427 for(; PTRCMP(cp
, <, cpmax
); ++cp
){
428 #ifdef HAVE_DOCSTRINGS
429 # define a_DS V_(cp->lc_doc)
433 if(!strcmp(arg
, cp
->lc_name
))
434 printf("%s: %s", arg
, a_DS
);
435 else if(is_prefix(arg
, cp
->lc_name
))
436 printf("%s (%s): %s", arg
, cp
->lc_name
, a_DS
);
440 if(options
& OPT_D_V
){
443 switch(cp
->lc_argtype
& ARG_ARGMASK
){
444 case ARG_MSGLIST
: atp
= N_("message-list"); break;
445 case ARG_STRLIST
: atp
= N_("a \"string\""); break;
446 case ARG_RAWLIST
: atp
= N_("old-style quoting"); break;
447 case ARG_NOLIST
: atp
= N_("no arguments"); break;
448 case ARG_NDMLIST
: atp
= N_("message-list (no default)"); break;
449 case ARG_WYSHLIST
: atp
= N_("sh(1)ell-style quoting"); break;
450 default: atp
= N_("`wysh' for sh(1)ell-style quoting"); break;
452 #ifdef HAVE_DOCSTRINGS
453 printf(_("\n\tArgument type: %s"), V_(atp
));
455 printf(_("argument type: %s"), V_(atp
));
464 if(PTRCMP(cpmax
, ==, &a_lex_cmd_tab
[n_NELEM(a_lex_cmd_tab
)])){
465 cpmax
= &(cp
= a_lex_special_cmd_tab
)[n_NELEM(a_lex_special_cmd_tab
)];
470 printf("%s\n", n_shexp_quote_cp(arg
, TRU1
));
473 n_err(_("Unknown command: `%s'\n"), arg
);
477 /* Very ugly, but take care for compiler supported string lengths :( */
478 fputs(progname
, stdout
);
480 " commands -- <msglist> denotes message specifications,\n"
481 "e.g., 1-5, :n or ., separated by spaces:\n"), stdout
);
484 "type <msglist> type (alias: `print') messages (honour `retain' etc.)\n"
485 "Type <msglist> like `type' but always show all headers\n"
486 "next goto and type next message\n"
487 "from <msglist> (search and) print header summary for the given list\n"
488 "headers header summary for messages surrounding \"dot\"\n"
489 "delete <msglist> delete messages (can be `undelete'd)\n"),
494 "save <msglist> folder append messages to folder and mark as saved\n"
495 "copy <msglist> folder like `save', but don't mark them (`move' moves)\n"
496 "write <msglist> file write message contents to file (prompts for parts)\n"
497 "Reply <msglist> reply to message senders only\n"
498 "reply <msglist> like `Reply', but address all recipients\n"
499 "Lreply <msglist> forced mailing-list `reply' (see `mlist')\n"),
504 "mail <recipients> compose a mail for the given recipients\n"
505 "file folder change to another mailbox\n"
506 "File folder like `file', but open readonly\n"
507 "quit quit and apply changes to the current mailbox\n"
508 "xit or exit like `quit', but discard changes\n"
509 "!shell command shell escape\n"
510 "list [<anything>] all available commands [in search order]\n"),
513 rv
= (ferror(stdout
) != 0);
521 a_lex_c_quit(void *v
){
525 /* If we are PS_SOURCING, then return 1 so _evaluate() can handle it.
526 * Otherwise return -1 to abort command loop */
533 a_lex_c_version(void *v
){
536 char const *cp
, **arr
;
541 printf(_("%s version %s\nFeatures included (+) or not (-)\n"),
542 uagent
, ok_vlook(version
));
544 /* *features* starts with dummy byte to avoid + -> *folder* expansions */
545 i
= strlen(cp
= &ok_vlook(features
)[1]) +1;
549 arr
= salloc(sizeof(cp
) * VAL_FEATURES_CNT
);
550 for(longest
= 0, i
= 0; (cp
= n_strsep(&iop
, ',', TRU1
)) != NULL
; ++i
){
553 longest
= n_MAX(longest
, (int)i2
);
555 qsort(arr
, i
, sizeof(cp
), &a_lex__version_cmp
);
557 for(++longest
, i2
= 0; i
-- > 0;){
559 printf("%-*s ", longest
, cp
);
561 if(UICMP(z
, ++i2
+ longest
, >=, scrnwidth
) || i
== 0){
567 if((rv
= ferror(stdout
) != 0))
574 a_lex__version_cmp(void const *s1
, void const *s2
){
575 char const * const *cp1
, * const *cp2
;
581 rv
= strcmp(&(*cp1
)[1], &(*cp2
)[1]);
587 a_lex_update_pstate(void){
590 if(pstate
& PS_SIGWINCH_PEND
){
593 snprintf(buf
, sizeof buf
, "%d", scrnwidth
);
594 ok_vset(COLUMNS
, buf
);
595 snprintf(buf
, sizeof buf
, "%d", scrnheight
);
599 pstate
&= ~PS_PSTATE_PENDMASK
;
604 a_lex_evaluate(struct a_lex_eval_ctx
*evp
){
605 /* xxx old style(9), but also old code */
607 char _wordbuf
[2], *arglist
[MAXARGC
], *cp
, *word
;
608 struct a_lex_ghost
*gp
;
609 struct a_lex_cmd
const *cmd
;
618 line
= evp
->le_line
; /* XXX don't change original (buffer pointer) */
619 assert(line
.s
[line
.l
] == '\0');
620 evp
->le_add_history
= FAL0
;
621 evp
->le_new_content
= NULL
;
623 /* Command ghosts that refer to shell commands or macro expansion restart */
626 /* Strip the white space away from end and beginning of command */
630 for(cp
= &line
.s
[i
-1]; spacechar(*cp
); --cp
)
634 for(cp
= line
.s
; spacechar(*cp
); ++cp
)
636 line
.l
-= PTR2SIZE(cp
- line
.s
);
638 /* Ignore null commands (comments) */
642 /* Handle ! differently to get the correct lexical conventions */
646 /* Isolate the actual command; since it may not necessarily be
647 * separated from the arguments (as in `p1') we need to duplicate it to
648 * be able to create a NUL terminated version.
649 * We must be aware of several special one letter commands here */
650 else if((cp
= a_lex_isolate(cp
)) == arglist
[0] &&
651 (*cp
== '|' || *cp
== '~' || *cp
== '?'))
653 c
= (int)PTR2SIZE(cp
- arglist
[0]);
655 word
= UICMP(z
, c
, <, sizeof _wordbuf
) ? _wordbuf
: salloc(c
+1);
656 memcpy(word
, arglist
[0], c
);
659 /* Look up the command; if not found, bitch.
660 * Normally, a blank command would map to the first command in the
661 * table; while PS_SOURCING, however, we ignore blank lines to eliminate
662 * confusion; act just the same for ghosts */
664 if((pstate
& PS_ROBOT
) || gp
!= NULL
)
666 cmd
= a_lex_cmd_tab
+ 0;
670 /* XXX It may be the argument parse adjuster */
671 if(!wysh
&& c
== sizeof("wysh") -1 && !asccasecmp(word
, "wysh")){
677 /* If this is the first evaluation, check command ghosts */
679 /* TODO relink list head, so it's sorted on usage over time?
680 * TODO in fact, there should be one hashmap over all commands and ghosts
681 * TODO so that the lookup could be made much more efficient than it is
682 * TODO now (two adjacent list searches! */
683 for(gp
= a_lex_ghosts
; gp
!= NULL
; gp
= gp
->lg_next
)
684 if(!strcmp(word
, gp
->lg_name
)){
689 line
.s
= salloc(i
+ line
.l
+1);
690 memcpy(line
.s
, gp
->lg_cmd
.s
, i
);
691 memcpy(line
.s
+ i
, cp
, line
.l
);
692 line
.s
[i
+= line
.l
] = '\0';
695 line
.s
= gp
->lg_cmd
.s
;
696 line
.l
= gp
->lg_cmd
.l
;
702 if((cmd
= a_lex__firstfit(word
)) == NULL
|| cmd
->lc_func
== &c_cmdnotsupp
){
705 if(!(s
= condstack_isskip()) || (options
& OPT_D_V
))
706 n_err(_("Unknown command%s: `%s'\n"),
707 (s
? _(" (ignored due to `if' condition)") : ""), word
);
717 /* See if we should execute the command -- if a conditional we always
718 * execute it, otherwise, check the state of cond */
720 if(!(cmd
->lc_argtype
& ARG_F
) && condstack_isskip())
723 /* Process the arguments to the command, depending on the type it expects */
724 if(!(cmd
->lc_argtype
& ARG_M
) && (options
& OPT_SENDMODE
)){
725 n_err(_("May not execute `%s' while sending\n"), cmd
->lc_name
);
728 if((cmd
->lc_argtype
& ARG_S
) && !(pstate
& PS_STARTED
)){
729 n_err(_("May not execute `%s' during startup\n"), cmd
->lc_name
);
732 if((cmd
->lc_argtype
& ARG_I
) &&
733 !(options
& (OPT_INTERACTIVE
| OPT_BATCH_FLAG
))){
734 n_err(_("May not execute `%s' unless interactive or in batch mode\n"),
738 if((cmd
->lc_argtype
& ARG_R
) && (pstate
& PS_RECURSED
)){
739 n_err(_("Cannot invoke `%s' when in recursed mode (e.g., composing)\n"),
744 if((cmd
->lc_argtype
& ARG_W
) && !(mb
.mb_perm
& MB_DELE
)){
745 n_err(_("May not execute `%s' -- message file is read only\n"),
749 if((cmd
->lc_argtype
& ARG_A
) && mb
.mb_type
== MB_VOID
){
750 n_err(_("Cannot execute `%s' without active mailbox\n"), cmd
->lc_name
);
754 if(cmd
->lc_argtype
& ARG_O
)
755 OBSOLETE2(_("this command will be removed"), cmd
->lc_name
);
756 if(cmd
->lc_argtype
& ARG_V
)
757 temporary_arg_v_store
= NULL
;
759 if(wysh
&& (cmd
->lc_argtype
& ARG_ARGMASK
) != ARG_WYRALIST
)
760 n_err(_("`wysh' prefix doesn't affect `%s'\n"), cmd
->lc_name
);
761 /* TODO v15: strip PS_ARGLIST_MASK off, just in case the actual command
762 * TODO doesn't use any of those list commands which strip this mask,
763 * TODO and for now we misuse bits for checking relation to history;
764 * TODO argument state should be property of a per-command carrier instead */
765 pstate
&= ~PS_ARGLIST_MASK
;
766 switch(cmd
->lc_argtype
& ARG_ARGMASK
){
768 /* Message list defaulting to nearest forward legal message */
771 if((c
= getmsglist(cp
, n_msgvec
, cmd
->lc_msgflag
)) < 0)
774 if((n_msgvec
[0] = first(cmd
->lc_msgflag
, cmd
->lc_msgmask
)) != 0)
777 if(n_msgvec
[0] == 0){
778 if(!(pstate
& PS_HOOK_MASK
))
779 printf(_("No applicable messages\n"));
782 e
= (*cmd
->lc_func
)(n_msgvec
);
786 /* Message list with no defaults, but no error if none exist */
787 if(n_msgvec
== NULL
){
789 n_err(_("Invalid use of message list\n"));
792 if((c
= getmsglist(cp
, n_msgvec
, cmd
->lc_msgflag
)) < 0)
794 e
= (*cmd
->lc_func
)(n_msgvec
);
798 /* Just the straight string, with leading blanks removed */
799 while(whitechar(*cp
))
801 e
= (*cmd
->lc_func
)(cp
);
816 if((c
= getrawlist((c
!= 0), arglist
, n_NELEM(arglist
), cp
, line
.l
)) < 0){
817 n_err(_("Invalid argument list\n"));
820 if(c
< cmd
->lc_minargs
){
821 n_err(_("`%s' requires at least %d arg(s)\n"),
822 cmd
->lc_name
, cmd
->lc_minargs
);
826 if(c
> cmd
->lc_maxargs
){
827 n_err(_("`%s' takes no more than %d arg(s)\n"),
828 cmd
->lc_name
, cmd
->lc_maxargs
);
832 e
= (*cmd
->lc_func
)(arglist
);
836 /* Just the constant zero, for exiting, eg. */
837 e
= (*cmd
->lc_func
)(0);
841 DBG( n_panic(_("Implementation error: unknown argument type: %d"),
842 cmd
->lc_argtype
& ARG_ARGMASK
); )
846 if(e
== 0 && (cmd
->lc_argtype
& ARG_V
) &&
847 (cp
= temporary_arg_v_store
) != NULL
){
848 temporary_arg_v_store
= NULL
;
849 evp
->le_new_content
= cp
;
852 if(!(cmd
->lc_argtype
& ARG_H
))
853 evp
->le_add_history
= (((cmd
->lc_argtype
& ARG_G
) ||
854 (pstate
& PS_MSGLIST_GABBY
)) ? TRUM1
: TRU1
);
858 bool_t reset
= !(pstate
& PS_ROOT
);
861 ok_vset(_exit_status
, (e
== 0 ? "0" : "1")); /* TODO num=1 +real value! */
866 /* Exit the current source file on error TODO what a mess! */
868 pstate
&= ~PS_EVAL_ERROR
;
870 pstate
|= PS_EVAL_ERROR
;
871 if(e
< 0 || (pstate
& PS_ROBOT
)){ /* FIXME */
880 if((cmd
->lc_argtype
& ARG_P
) && ok_blook(autoprint
))
882 line
.s
= savestr("type");
883 line
.l
= sizeof("type") -1;
884 gp
= (struct a_lex_ghost
*)-1; /* Avoid `ghost' interpretation */
888 if(!(pstate
& (PS_SOURCING
| PS_HOOK_MASK
)) && !(cmd
->lc_argtype
& ARG_T
))
889 pstate
|= PS_SAW_COMMAND
;
891 pstate
&= ~PS_EVAL_ERROR
;
896 fprintf(stderr, "a_lex_evaluate returns %d for <%s>\n",e,line.s);
902 static struct a_lex_cmd
const *
903 a_lex__firstfit(char const *comm
){ /* TODO *hashtable*! linear list search!!! */
904 struct a_lex_cmd
const *cp
;
907 for(cp
= a_lex_cmd_tab
;
908 PTRCMP(cp
, <, &a_lex_cmd_tab
[n_NELEM(a_lex_cmd_tab
)]); ++cp
)
909 if(*comm
== *cp
->lc_name
&& is_prefix(comm
, cp
->lc_name
))
919 NYD_X
; /* Signal handler */
926 a_lex_onintr(int s
){ /* TODO block signals while acting */
927 NYD_X
; /* Signal handler */
930 safe_signal(SIGINT
, a_lex_onintr
);
932 termios_state_reset();
933 close_all_files(); /* FIXME .. of current level ONLU! */
939 a_lex_unstack(TRUM1
);
942 n_err_sighdl(_("Interrupt\n"));
943 safe_signal(SIGPIPE
, a_lex_oldpipe
);
944 siglongjmp(srbuf
, 0); /* FIXME get rid */
948 a_lex_unstack(bool_t eval_error
){
949 struct a_lex_input_stack
*lip
;
952 if((lip
= a_lex_input
) == NULL
){
955 /* If called from a_lex_onintr(), be silent FIXME */
956 pstate
&= ~(PS_SOURCING
| PS_ROBOT
);
957 if(eval_error
== TRUM1
|| !(pstate
& PS_STARTED
))
962 if(lip
->li_flags
& a_LEX_MACRO
){
963 if(lip
->li_flags
& a_LEX_MACRO_FREE_DATA
){
966 while(*(lp
= &lip
->li_lines
[lip
->li_loff
]) != NULL
){
970 /* Part of lip's memory chunk, then */
971 if(!(lip
->li_flags
& a_LEX_MACRO_CMD
))
975 if(lip
->li_flags
& a_LEX_PIPE
)
976 /* XXX command manager should -TERM then -KILL instead of hoping
977 * XXX for exit of provider due to EPIPE / SIGPIPE */
978 Pclose(lip
->li_file
, TRU1
);
980 Fclose(lip
->li_file
);
983 if(!condstack_take(lip
->li_cond
)){
984 n_err(_("Unmatched `if' at end of %s %s\n"),
985 ((lip
->li_flags
& a_LEX_MACRO
986 ? (lip
->li_flags
& a_LEX_MACRO_CMD
? _("command") : _("macro"))
987 : _("`source'd file"))),
992 n_memory_autorec_pop(&lip
->li_autorecmem
[0]);
994 if((a_lex_input
= lip
->li_outer
) == NULL
){
995 pstate
&= ~(PS_SOURCING
| PS_ROBOT
);
997 if((a_lex_input
->li_flags
& (a_LEX_MACRO
| a_LEX_SUPER_MACRO
)) ==
998 (a_LEX_MACRO
| a_LEX_SUPER_MACRO
))
999 pstate
&= ~PS_SOURCING
;
1000 assert(pstate
& PS_ROBOT
);
1006 if(lip
!= NULL
&& (lip
->li_flags
& a_LEX_FREE
))
1008 if(n_UNLIKELY(a_lex_input
!= NULL
&& eval_error
== TRUM1
))
1009 a_lex_unstack(TRUM1
);
1015 if(options
& OPT_D_V
)
1016 n_alert(_("Stopped %s %s due to errors%s"),
1017 (pstate
& PS_STARTED
1018 ? (lip
->li_flags
& a_LEX_MACRO
1019 ? (lip
->li_flags
& a_LEX_MACRO_CMD
1020 ? _("evaluating command") : _("evaluating macro"))
1021 : (lip
->li_flags
& a_LEX_PIPE
1022 ? _("executing `source'd pipe")
1023 : _("loading `source'd file")))
1024 : (lip
->li_flags
& a_LEX_MACRO
1025 ? (lip
->li_flags
& a_LEX_MACRO_X_OPTION
1026 ? _("evaluating command line") : _("evaluating macro"))
1027 : _("loading initialization resource"))),
1029 (options
& OPT_DEBUG
? "" : _(" (enable *debug* for trace)")));
1032 if(!(options
& OPT_INTERACTIVE
) && !(pstate
& PS_STARTED
)){
1033 if(options
& OPT_D_V
)
1034 n_alert(_("Non-interactive, bailing out due to errors "
1035 "in startup load phase"));
1042 a_lex_source_file(char const *file
, bool_t silent_error
){
1043 struct a_lex_input_stack
*lip
;
1052 /* Being a command argument file is space-trimmed *//* TODO v15 with
1053 * TODO WYRALIST this is no longer necessary true, and for that we
1054 * TODO don't set _PARSE_TRIMSPACE because we cannot! -> cmd_tab.h!! */
1056 ((ispipe
= (!silent_error
&& (nlen
= strlen(file
)) > 0 &&
1057 file
[--nlen
] == '|')))
1061 for(nlen
= strlen(file
); nlen
> 0;){
1067 nbuf
= savestrbuf(file
, nlen
);
1076 if((fip
= Popen(nbuf
/* #if 0 above = savestrbuf(file, nlen)*/, "r",
1077 ok_vlook(SHELL
), NULL
, COMMAND_FD_NULL
)) == NULL
){
1078 if(!silent_error
|| (options
& OPT_D_V
))
1082 }else if((nbuf
= fexpand(file
, FEXP_LOCAL
)) == NULL
)
1084 else if((fip
= Fopen(nbuf
, "r")) == NULL
){
1085 if(!silent_error
|| (options
& OPT_D_V
))
1090 lip
= smalloc(sizeof(*lip
) -
1091 n_VFIELD_SIZEOF(struct a_lex_input_stack
, li_name
) +
1092 (nlen
= strlen(nbuf
) +1));
1093 lip
->li_outer
= a_lex_input
;
1095 lip
->li_cond
= condstack_release();
1096 n_memory_autorec_push(&lip
->li_autorecmem
[0]);
1097 lip
->li_flags
= (ispipe
? a_LEX_FREE
| a_LEX_PIPE
: a_LEX_FREE
) |
1098 (a_lex_input
!= NULL
&& (a_lex_input
->li_flags
& a_LEX_SUPER_MACRO
)
1099 ? a_LEX_SUPER_MACRO
: 0);
1100 memcpy(lip
->li_name
, nbuf
, nlen
);
1102 pstate
|= PS_SOURCING
| PS_ROBOT
;
1104 a_commands_recursive(n_LEXINPUT_NONE
| n_LEXINPUT_NL_ESC
);
1105 /* FIXME return TRUM1 if file can't be opened, FAL0 on eval error */
1108 return silent_error
? TRU1
: (fip
!= NULL
);
1112 a_lex_load(struct a_lex_input_stack
*lip
){
1116 assert(!(pstate
& PS_STARTED
));
1117 assert(a_lex_input
== NULL
);
1120 * Any errors in the start-up file shall either cause mailx to terminate
1121 * with a diagnostic message and a non-zero status or to continue after
1122 * writing a diagnostic message, ignoring the remainder of the lines in
1123 * the start-up file. */
1124 lip
->li_cond
= condstack_release();
1125 n_memory_autorec_push(&lip
->li_autorecmem
[0]);
1127 /* FIXME won't work for now (PS_ROBOT needs PS_SOURCING anyway)
1128 pstate |= PS_ROBOT |
1129 (lip->li_flags & a_LEX_MACRO_X_OPTION ? 0 : PS_SOURCING);
1131 pstate
|= PS_ROBOT
| PS_SOURCING
;
1132 if(options
& OPT_D_V
)
1133 n_err(_("Loading %s\n"), n_shexp_quote_cp(lip
->li_name
, FAL0
));
1135 if(!(rv
= n_commands())){
1136 if(!(options
& OPT_INTERACTIVE
)){
1137 if(options
& OPT_D_V
)
1138 n_alert(_("Non-interactive program mode, forced exit"));
1142 /* PS_EXIT handled by callers */
1148 a_commands_recursive(enum n_lexinput_flags lif
){
1149 struct a_lex_eval_ctx ev
;
1153 memset(&ev
, 0, sizeof ev
);
1155 /* FIXME sigkondom */
1156 n_COLOUR( n_colour_env_push(); )
1161 /* Read a line of commands and handle end of file specially */
1162 ev
.le_line
.l
= ev
.le_line_size
;
1163 n
= n_lex_input(lif
, NULL
, &ev
.le_line
.s
, &ev
.le_line
.l
,
1165 ev
.le_line_size
= (ui32_t
)ev
.le_line
.l
;
1166 ev
.le_line
.l
= (ui32_t
)n
;
1171 if(a_lex_evaluate(&ev
)){
1177 if((options
& OPT_BATCH_FLAG
) && ok_blook(batch_exit_on_error
)){
1178 if(exit_status
!= EXIT_OK
)
1183 n_COLOUR( n_colour_env_pop(FAL0
); )
1185 if(ev
.le_line
.s
!= NULL
)
1192 n_commands(void){ /* FIXME */
1193 struct a_lex_eval_ctx ev
;
1200 if (!(pstate
& PS_SOURCING
)) {
1201 if (safe_signal(SIGINT
, SIG_IGN
) != SIG_IGN
)
1202 safe_signal(SIGINT
, &a_lex_onintr
);
1203 if (safe_signal(SIGHUP
, SIG_IGN
) != SIG_IGN
)
1204 safe_signal(SIGHUP
, &a_lex_hangup
);
1206 a_lex_oldpipe
= safe_signal(SIGPIPE
, SIG_IGN
);
1207 safe_signal(SIGPIPE
, a_lex_oldpipe
);
1209 memset(&ev
, 0, sizeof ev
);
1211 (void)sigsetjmp(srbuf
, 1); /* FIXME get rid */
1213 char *temporary_orig_line
; /* XXX eval_ctx.le_line not yet constant */
1215 n_COLOUR( n_colour_env_pop(TRU1
); )
1217 /* TODO Unless we have our signal manager (or however we do it) child
1218 * TODO processes may have time slots where their execution isn't
1219 * TODO protected by signal handlers (in between start and setup
1220 * TODO completed). close_all_files() is only called from onintr()
1221 * TODO so those may linger possibly forever */
1222 if(!(pstate
& PS_SOURCING
))
1227 temporary_localopts_free(); /* XXX intermediate hack */
1231 if (!(pstate
& PS_SOURCING
)) {
1234 /* TODO Note: this buffer may contain a password. We should redefine
1235 * TODO the code flow which has to do that */
1236 if ((cp
= termios_state
.ts_linebuf
) != NULL
) {
1237 termios_state
.ts_linebuf
= NULL
;
1238 termios_state
.ts_linesize
= 0;
1239 free(cp
); /* TODO pool give-back */
1241 /* TODO Due to expand-on-tab of NCL the buffer may grow */
1242 if (ev
.le_line
.l
> LINESIZE
* 3) {
1243 free(ev
.le_line
.s
); /* TODO pool! but what? */
1244 ev
.le_line
.s
= NULL
;
1245 ev
.le_line
.l
= ev
.le_line_size
= 0;
1249 if (!(pstate
& PS_SOURCING
) && (options
& OPT_INTERACTIVE
)) {
1252 cp
= ok_vlook(newmail
);
1253 if ((options
& OPT_TTYIN
) && cp
!= NULL
) {
1256 /* FIXME TEST WITH NOPOLL ETC. !!! */
1257 n
= (cp
!= NULL
&& strcmp(cp
, "nopoll"));
1258 if ((mb
.mb_type
== MB_FILE
&& !stat(mailname
, &st
) &&
1259 st
.st_size
> mailsize
) ||
1260 (mb
.mb_type
== MB_MAILDIR
&& n
!= 0)) {
1261 size_t odot
= PTR2SIZE(dot
- message
);
1262 ui32_t odid
= (pstate
& PS_DID_PRINT_DOT
);
1264 if (setfile(mailname
,
1266 ((mb
.mb_perm
& MB_DELE
) ? 0 : FEDIT_RDONLY
)) < 0) {
1267 exit_status
|= EXIT_ERR
;
1271 dot
= message
+ odot
;
1276 exit_status
= EXIT_OK
;
1279 /* Read a line of commands and handle end of file specially */
1281 ev
.le_line
.l
= ev
.le_line_size
;
1282 n
= n_lex_input(n_LEXINPUT_CTX_DEFAULT
| n_LEXINPUT_NL_ESC
, NULL
,
1283 &ev
.le_line
.s
, &ev
.le_line
.l
, ev
.le_new_content
);
1284 ev
.le_line_size
= (ui32_t
)ev
.le_line
.l
;
1285 ev
.le_line
.l
= (ui32_t
)n
;
1288 /* FIXME did unstack() when PS_SOURCING, only break with PS_LOADING*/
1289 if (!(pstate
& PS_ROBOT
) &&
1290 (options
& OPT_INTERACTIVE
) && ok_blook(ignoreeof
)) {
1291 printf(_("*ignoreeof* set, use `quit' to quit.\n"));
1292 n_msleep(500, FAL0
);
1298 temporary_orig_line
= ((pstate
& PS_SOURCING
) ||
1299 !(options
& OPT_INTERACTIVE
)) ? NULL
1300 : savestrbuf(ev
.le_line
.s
, ev
.le_line
.l
);
1301 pstate
&= ~PS_HOOK_MASK
;
1302 if (a_lex_evaluate(&ev
)) {
1303 if (!(pstate
& PS_STARTED
)) /* TODO mess; join PS_EVAL_ERROR.. */
1308 if ((options
& OPT_BATCH_FLAG
) && ok_blook(batch_exit_on_error
)) {
1309 if (exit_status
!= EXIT_OK
)
1311 if ((pstate
& (PS_SOURCING
| PS_EVAL_ERROR
)) == PS_EVAL_ERROR
) {
1312 exit_status
= EXIT_ERR
;
1316 if (!(pstate
& PS_SOURCING
) && (options
& OPT_INTERACTIVE
)) {
1317 if (ev
.le_new_content
!= NULL
)
1319 /* *Can* happen since _evaluate() n_unstack()s on error! XXX no more */
1320 if (temporary_orig_line
!= NULL
)
1321 n_tty_addhist(temporary_orig_line
, (ev
.le_add_history
!= TRU1
));
1324 if(pstate
& PS_EXIT
)
1330 if (ev
.le_line
.s
!= NULL
)
1337 (n_lex_input
)(enum n_lexinput_flags lif
, char const *prompt
, char **linebuf
,
1338 size_t *linesize
, char const *string n_MEMORY_DEBUG_ARGS
){
1339 /* TODO readline: linebuf pool!; n_lex_input should return si64_t */
1340 struct n_string xprompt
;
1342 bool_t doprompt
, dotty
;
1347 /* Special case macro mode: never need to prompt, lines have always been
1348 * unfolded already */
1349 if(a_lex_input
!= NULL
&& (a_lex_input
->li_flags
& a_LEX_MACRO
)){
1350 if(*linebuf
!= NULL
)
1353 if((*linebuf
= a_lex_input
->li_lines
[a_lex_input
->li_loff
]) == NULL
){
1359 ++a_lex_input
->li_loff
;
1360 *linesize
= strlen(*linebuf
);
1361 if(!(a_lex_input
->li_flags
& a_LEX_MACRO_FREE_DATA
))
1362 *linebuf
= sbufdup(*linebuf
, *linesize
);
1364 iftype
= (a_lex_input
->li_flags
& a_LEX_MACRO_X_OPTION
)
1365 ? "-X OPTION" : "MACRO";
1367 pstate
|= PS_READLINE_NL
;
1370 pstate
&= ~PS_READLINE_NL
;
1372 iftype
= (!(pstate
& PS_STARTED
) ? "LOAD"
1373 : (pstate
& PS_SOURCING
) ? "SOURCE" : "READ");
1374 doprompt
= ((pstate
& (PS_STARTED
| PS_ROBOT
)) == PS_STARTED
&&
1375 (options
& OPT_INTERACTIVE
));
1376 dotty
= (doprompt
&& !ok_blook(line_editor_disable
));
1378 lif
|= n_LEXINPUT_PROMPT_NONE
;
1381 n_string_creat_auto(&xprompt
);
1383 lif
|= n_LEXINPUT_PROMPT_EVAL
;
1386 /* Ensure stdout is flushed first anyway */
1387 if(!dotty
&& (lif
& n_LEXINPUT_PROMPT_NONE
))
1390 ifile
= (a_lex_input
!= NULL
) ? a_lex_input
->li_file
: stdin
;
1391 assert(ifile
!= NULL
);
1393 for(nold
= n
= 0;;){
1395 assert(ifile
== stdin
);
1396 if(string
!= NULL
&& (n
= (int)strlen(string
)) > 0){
1400 *linesize
= (size_t)n
+ LINESIZE
+1;
1401 *linebuf
= (n_realloc
)(*linebuf
, *linesize n_MEMORY_DEBUG_ARGSCALL
);
1402 memcpy(*linebuf
, string
, (size_t)n
+1);
1405 /* TODO if nold>0, don't redisplay the entire line!
1406 * TODO needs complete redesign ... */
1407 n
= (n_tty_readline
)(lif
, prompt
, linebuf
, linesize
, n
1408 n_MEMORY_DEBUG_ARGSCALL
);
1410 if(!(lif
& n_LEXINPUT_PROMPT_NONE
)){
1411 n_tty_create_prompt(&xprompt
, prompt
, lif
);
1412 if(xprompt
.s_len
> 0){
1413 fwrite(xprompt
.s_dat
, 1, xprompt
.s_len
, stdout
);
1418 n
= (readline_restart
)(ifile
, linebuf
, linesize
, n
1419 n_MEMORY_DEBUG_ARGSCALL
);
1421 if(n
> 0 && nold
> 0){
1423 char const *cp
= *linebuf
+ nold
;
1425 while(blankspacechar(*cp
) && nold
+ i
< n
)
1428 memmove(*linebuf
+ nold
, cp
, n
- nold
- i
);
1430 (*linebuf
)[n
] = '\0';
1439 * An unquoted <backslash> at the end of a command line shall
1440 * be discarded and the next line shall continue the command */
1441 if(!(lif
& n_LEXINPUT_NL_ESC
) || (*linebuf
)[n
- 1] != '\\'){
1443 pstate
|= PS_READLINE_NL
;
1446 /* Definitely outside of quotes, thus the quoting rules are so that an
1447 * uneven number of successive backslashs at EOL is a continuation */
1451 for(j
= 1, i
= (size_t)n
- 1; i
-- > 0; ++j
)
1452 if((*linebuf
)[i
] != '\\')
1457 (*linebuf
)[nold
= --n
] = '\0';
1458 lif
|= n_LEXINPUT_NL_FOLLOW
;
1463 (*linebuf
)[*linesize
= n
] = '\0';
1467 if(lif
& n_LEXINPUT_DROP_TRAIL_SPC
){
1471 for(cp
= &(*linebuf
)[i
= (size_t)n
];; --i
){
1473 if(!blankspacechar(c
))
1476 (*linebuf
)[n
= (int)i
] = '\0';
1479 if(lif
& n_LEXINPUT_DROP_LEAD_SPC
){
1483 for(cp
= &(*linebuf
)[0], j
= (size_t)n
, i
= 0; i
< j
; ++i
){
1485 if(!blankspacechar(c
))
1489 memcpy(&(*linebuf
)[0], &(*linebuf
)[i
], j
-= i
);
1490 (*linebuf
)[n
= (int)j
] = '\0';
1493 #endif /* 0 (notyet - must take care for backslash escaped space) */
1495 if(options
& OPT_D_VV
)
1496 n_err(_("%s %d bytes <%s>\n"), iftype
, n
, *linebuf
);
1498 if (pstate
& PS_PSTATE_PENDMASK
)
1499 a_lex_update_pstate();
1505 n_lex_input_cp(enum n_lexinput_flags lif
, char const *prompt
,
1506 char const *string
){
1507 /* FIXME n_lex_input_cp_addhist(): leaks on sigjmp without linepool */
1517 n
= n_lex_input(lif
, prompt
, &linebuf
, &linesize
, string
);
1518 if(n
> 0 && *(rv
= savestrbuf(linebuf
, (size_t)n
)) != '\0' &&
1519 (lif
& n_LEXINPUT_HIST_ADD
) && (options
& OPT_INTERACTIVE
))
1520 n_tty_addhist(rv
, ((lif
& n_LEXINPUT_HIST_GABBY
) != 0));
1529 n_load(char const *name
){
1530 struct a_lex_input_stack
*lip
;
1535 if(name
== NULL
|| *name
== '\0' || (fip
= Fopen(name
, "r")) == NULL
)
1538 i
= strlen(name
) +1;
1539 lip
= scalloc(1, sizeof(*lip
) -
1540 n_VFIELD_SIZEOF(struct a_lex_input_stack
, li_name
) + i
);
1542 lip
->li_flags
= a_LEX_FREE
;
1543 memcpy(lip
->li_name
, name
, i
);
1552 n_load_Xargs(char const **lines
, size_t cnt
){
1553 static char const name
[] = "-X";
1555 ui8_t buf
[sizeof(struct a_lex_input_stack
) + sizeof name
];
1556 char const *srcp
, *xsrcp
;
1558 size_t imax
, i
, len
;
1559 struct a_lex_input_stack
*lip
;
1562 memset(buf
, 0, sizeof buf
);
1564 lip
->li_flags
= a_LEX_MACRO
| a_LEX_MACRO_FREE_DATA
|
1565 a_LEX_MACRO_X_OPTION
| a_LEX_SUPER_MACRO
;
1566 memcpy(lip
->li_name
, name
, sizeof name
);
1568 /* The problem being that we want to support reverse solidus newline
1569 * escaping also within multiline -X, i.e., POSIX says:
1570 * An unquoted <backslash> at the end of a command line shall
1571 * be discarded and the next line shall continue the command
1572 * Therefore instead of "lip->li_lines = n_UNCONST(lines)", duplicate the
1573 * entire lines array and set _MACRO_FREE_DATA */
1575 lip
->li_lines
= smalloc(sizeof(*lip
->li_lines
) * imax
);
1577 /* For each of the input lines.. */
1578 for(i
= len
= 0, cp
= NULL
; cnt
> 0;){
1582 if((j
= strlen(srcp
= *lines
)) == 0){
1587 /* Separate one line from a possible multiline input string */
1588 if((xsrcp
= memchr(srcp
, '\n', j
)) != NULL
){
1590 j
= PTR2SIZE(xsrcp
- srcp
);
1594 /* The (separated) string may itself indicate soft newline escaping */
1595 if((keep
= (srcp
[j
- 1] == '\\'))){
1598 /* Need an uneven number of reverse solidus */
1599 for(xk
= 1, xj
= j
- 1; xj
-- > 0; ++xk
)
1600 if(srcp
[xj
] != '\\')
1608 /* Strip any leading WS from follow lines, then */
1610 while(j
> 0 && blankspacechar(*srcp
))
1614 if(i
+ 2 >= imax
){ /* TODO need a vector (main.c, here, ++) */
1616 lip
->li_lines
= n_realloc(lip
->li_lines
, sizeof(*lip
->li_lines
) *
1619 lip
->li_lines
[i
] = cp
= n_realloc(cp
, len
+ j
+1);
1620 memcpy(&cp
[len
], srcp
, j
);
1621 cp
[len
+= j
] = '\0';
1630 assert(i
+ 1 < imax
);
1631 lip
->li_lines
[i
++] = cp
;
1633 lip
->li_lines
[i
] = NULL
;
1636 if(pstate
& PS_EXIT
)
1646 rv
= (a_lex_source_file(*(char**)v
, FAL0
) == TRU1
) ? 0 : 1;
1652 c_source_if(void *v
){ /* XXX obsolete?, support file tests in `if' etc.! */
1656 rv
= (a_lex_source_file(*(char**)v
, TRU1
) != FAL0
) ? 0 : 1;
1662 n_source_macro(enum n_lexinput_flags lif
, char const *name
, char **lines
){
1663 struct a_lex_input_stack
*lip
;
1668 lip
= smalloc(sizeof(*lip
) -
1669 n_VFIELD_SIZEOF(struct a_lex_input_stack
, li_name
) +
1670 (i
= strlen(name
) +1));
1671 lip
->li_outer
= a_lex_input
;
1672 lip
->li_file
= NULL
;
1673 lip
->li_cond
= condstack_release();
1674 n_memory_autorec_push(&lip
->li_autorecmem
[0]);
1675 lip
->li_flags
= a_LEX_FREE
| a_LEX_MACRO
| a_LEX_MACRO_FREE_DATA
|
1676 (a_lex_input
== NULL
|| (a_lex_input
->li_flags
& a_LEX_SUPER_MACRO
)
1677 ? a_LEX_SUPER_MACRO
: 0);
1679 lip
->li_lines
= lines
;
1680 memcpy(lip
->li_name
, name
, i
);
1684 rv
= a_commands_recursive(lif
);
1690 n_source_command(enum n_lexinput_flags lif
, char const *cmd
){
1691 struct a_lex_input_stack
*lip
;
1697 cmd
= sbufdup(cmd
, i
++);
1700 lip
= smalloc(sizeof(*lip
) -
1701 n_VFIELD_SIZEOF(struct a_lex_input_stack
, li_name
) +
1702 ial
+ 2*sizeof(char*));
1703 lip
->li_outer
= a_lex_input
;
1704 lip
->li_file
= NULL
;
1705 lip
->li_cond
= condstack_release();
1706 n_memory_autorec_push(&lip
->li_autorecmem
[0]);
1707 lip
->li_flags
= a_LEX_FREE
| a_LEX_MACRO
| a_LEX_MACRO_FREE_DATA
|
1709 (a_lex_input
== NULL
|| (a_lex_input
->li_flags
& a_LEX_SUPER_MACRO
)
1710 ? a_LEX_SUPER_MACRO
: 0);
1712 lip
->li_lines
= (void*)(lip
->li_name
+ ial
);
1713 lip
->li_lines
[0] = n_UNCONST(cmd
); /* dup'ed above */
1714 lip
->li_lines
[1] = NULL
;
1715 memcpy(lip
->li_name
, cmd
, i
);
1719 rv
= a_commands_recursive(lif
);
1725 n_source_may_yield_control(void){
1726 return ((options
& OPT_INTERACTIVE
) &&
1727 (pstate
& PS_STARTED
) &&
1728 (!(pstate
& PS_ROBOT
) || (pstate
& PS_RECURSED
)) && /* Ok for ~: */
1729 (a_lex_input
== NULL
|| a_lex_input
->li_outer
== NULL
));