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 /* TODO For simplicity this is yet _MACRO plus specialization overlay
51 * TODO (_X_OPTION, _CMD) -- these should be types on their own! */
52 a_LEX_MACRO_X_OPTION
= 1<<4, /* Macro indeed command line -X option */
53 a_LEX_MACRO_CMD
= 1<<5, /* Macro indeed single-line: ~:COMMAND */
54 /* TODO a_LEX_SLICE: the right way to support *on-compose-done-shell* would
55 * TODO be a command_loop object that emits an on_read_line event, and
56 * TODO have a special handler for the compose mode; with that, then,
57 * TODO commands_recursive() would not call lex_evaluate() but
58 * TODO CTX->on_read_line, and lex_evaluate() would be the standard impl.,
59 * TODO whereas the COMMAND ESCAPE switch in collect.c would be another one.
60 * TODO With this generic approach accmacvar.c:call_compose_mode_hook()
61 * TODO could be dropped, and n_source_macro() could become extended,
62 * TODO and/or we would add a n_source_anything(), which would allow special
63 * TODO input handlers, special I/O input and output, special `localopts'
64 * TODO etc., to be glued to the new execution context. And all I/O all
65 * TODO over this software should not use stdin/stdout, but CTX->in/out.
66 * TODO The pstate must be a property of the current execution context, too.
67 * TODO This not today. :( For now we invent a special SLICE execution
68 * TODO context overlay that at least allows to temporarily modify the
69 * TODO global pstate, and the global stdin and stdout pointers. HACK!
70 * TODO This slice thing is very special and has to go again. HACK!!
71 * TODO a_lex_input() will drop it once it sees EOF (HACK!), but care for
72 * TODO jumps must be taken by slice creators. HACK!!! But works. ;} */
75 a_LEX_SUPER_MACRO
= 1<<16 /* *Not* inheriting PS_SOURCING state */
79 char const *lc_name
; /* Name of command */
80 int (*lc_func
)(void*); /* Implementor of command */
81 enum argtype lc_argtype
; /* Arglist type (see below) */
82 si16_t lc_msgflag
; /* Required flags of msgs */
83 si16_t lc_msgmask
; /* Relevant flags of msgs */
84 #ifdef HAVE_DOCSTRINGS
85 char const *lc_doc
; /* One line doc for command */
88 /* Yechh, can't initialize unions */
89 #define lc_minargs lc_msgflag /* Minimum argcount for RAWLIST */
90 #define lc_maxargs lc_msgmask /* Max argcount for RAWLIST */
93 struct a_lex_ghost
*lg_next
;
94 struct str lg_cmd
; /* Data follows after .lg_name */
95 char lg_name
[n_VFIELD_SIZE(0)];
98 struct a_lex_eval_ctx
{
99 struct str le_line
; /* The terminated data to _evaluate() */
100 ui32_t le_line_size
; /* May be used to store line memory size */
101 bool_t le_is_recursive
; /* Evaluation in evaluation? (collect ~:) */
103 bool_t le_add_history
; /* Add command to history (TRUM1=gabby)? */
104 char const *le_new_content
; /* History: reenter line, start with this */
107 struct a_lex_input_stack
{
108 struct a_lex_input_stack
*li_outer
;
109 FILE *li_file
; /* File we were in */
110 void *li_cond
; /* Saved state of conditional stack */
111 ui32_t li_flags
; /* enum a_lex_input_flags */
112 ui32_t li_loff
; /* Pseudo (macro): index in .li_lines */
113 char **li_lines
; /* Pseudo content, lines unfolded */
114 void (*li_on_finalize
)(void *);
115 void *li_finalize_arg
;
116 char li_autorecmem
[n_MEMORY_AUTOREC_TYPE_SIZEOF
];
117 sigjmp_buf li_cmdrec_jmp
; /* TODO one day... for command_recursive */
118 /* SLICE hacks: saved stdin/stdout, saved pstate */
119 FILE *li_slice_stdin
;
120 FILE *li_slice_stdout
;
121 ui32_t li_slice_options
;
122 ui8_t li_slice__dummy
[4];
123 char li_name
[n_VFIELD_SIZE(0)]; /* Name of file or macro */
125 n_CTA(n_MEMORY_AUTOREC_TYPE_SIZEOF
% sizeof(void*) == 0,
126 "Inacceptible size of structure buffer");
128 static sighandler_type a_lex_oldpipe
;
129 static struct a_lex_ghost
*a_lex_ghosts
;
130 /* a_lex_cmd_tab[] after fun protos */
133 static struct a_lex_input_stack
*a_lex_input
;
135 static sigjmp_buf a_lex_srbuf
; /* TODO GET RID */
137 /* Isolate the command from the arguments */
138 static char *a_lex_isolate(char const *comm
);
140 /* Command ghost handling */
141 static int a_lex_c_ghost(void *v
);
142 static int a_lex_c_unghost(void *v
);
144 /* Print a list of all commands */
145 static int a_lex_c_list(void *v
);
147 static int a_lex__pcmd_cmp(void const *s1
, void const *s2
);
149 /* `help' / `?' command */
150 static int a_lex_c_help(void *v
);
153 static int a_lex_c_quit(void *v
);
155 /* Print the binaries version number */
156 static int a_lex_c_version(void *v
);
158 static int a_lex__version_cmp(void const *s1
, void const *s2
);
160 /* PS_STATE_PENDMASK requires some actions */
161 static void a_lex_update_pstate(void);
163 /* Evaluate a single command.
164 * .le_add_history and .le_new_content will be updated upon success.
165 * Command functions return 0 for success, 1 for error, and -1 for abort.
166 * 1 or -1 aborts a load or source, a -1 aborts the interactive command loop */
167 static int a_lex_evaluate(struct a_lex_eval_ctx
*evp
);
169 /* Get first-fit, or NULL */
170 static struct a_lex_cmd
const *a_lex__firstfit(char const *comm
);
172 /* Branch here on hangup signal and simulate "exit" */
173 static void a_lex_hangup(int s
);
175 /* The following gets called on receipt of an interrupt. Close all open files
176 * except 0, 1, 2, and the temporary. Also, unstack all source files */
177 static void a_lex_onintr(int s
);
179 /* Pop the current input back to the previous level. Update the program state.
180 * If the argument is TRUM1 then we don't alert and error out if the stack
181 * doesn't exist at all */
182 static void a_lex_unstack(bool_t eval_error
);
184 /* `source' and `source_if' (if silent_error: no pipes allowed, then) */
185 static bool_t
a_lex_source_file(char const *file
, bool_t silent_error
);
187 /* System resource file load()ing or -X command line option array traversal */
188 static bool_t
a_lex_load(struct a_lex_input_stack
*lip
);
190 /* A simplified command loop for recursed state machines */
191 static bool_t
a_commands_recursive(enum n_lexinput_flags lif
);
193 /* List of all commands, and list of commands which are specially treated
194 * and deduced in _evaluate(), but we need a list for _c_list() and
195 * print_comm_docstr() */
196 #ifdef HAVE_DOCSTRINGS
201 static struct a_lex_cmd
const a_lex_cmd_tab
[] = {
204 a_lex_special_cmd_tab
[] = {
206 DS(N_("Comment command: ignore remaining (continuable) line")) },
208 DS(N_("Print out the preceding message")) }
213 a_lex_isolate(char const *comm
){
215 while(*comm
!= '\0' &&
216 strchr("~|? \t0123456789&%@$^.:/-+*'\",;(`", *comm
) == NULL
)
219 return n_UNCONST(comm
);
223 a_lex_c_ghost(void *v
){
224 struct a_lex_ghost
*lgp
, *gp
;
236 if((fp
= Ftmp(NULL
, "ghost", OF_RDWR
| OF_UNLINK
| OF_REGISTER
)) == NULL
)
239 for(i
= 0, gp
= a_lex_ghosts
; gp
!= NULL
; gp
= gp
->lg_next
)
240 fprintf(fp
, "wysh ghost %s %s\n",
241 gp
->lg_name
, n_shexp_quote_cp(gp
->lg_cmd
.s
, TRU1
));
244 page_or_print(fp
, i
);
250 /* Verify the ghost name is a valid one */
251 if(*argv
[0] == '\0' || *a_lex_isolate(argv
[0]) != '\0'){
252 n_err(_("`ghost': can't canonicalize %s\n"),
253 n_shexp_quote_cp(argv
[0], FAL0
));
258 /* Show command of single ghost? */
260 for(gp
= a_lex_ghosts
; gp
!= NULL
; gp
= gp
->lg_next
)
261 if(!strcmp(argv
[0], gp
->lg_name
)){
262 printf("wysh ghost %s %s\n",
263 gp
->lg_name
, n_shexp_quote_cp(gp
->lg_cmd
.s
, TRU1
));
266 n_err(_("`ghost': no such alias: %s\n"), argv
[0]);
271 /* Define command for ghost: verify command content */
272 for(cl
= 0, i
= 1; (cp
= n_UNCONST(argv
[i
])) != NULL
; ++i
)
274 cl
+= strlen(cp
) +1; /* SP or NUL */
276 n_err(_("`ghost': empty command arguments after %s\n"), argv
[0]);
281 /* If the ghost already exists, recreate */
282 for(lgp
= NULL
, gp
= a_lex_ghosts
; gp
!= NULL
; lgp
= gp
, gp
= gp
->lg_next
)
283 if(!strcmp(gp
->lg_name
, argv
[0])){
285 lgp
->lg_next
= gp
->lg_next
;
287 a_lex_ghosts
= gp
->lg_next
;
292 nl
= strlen(argv
[0]) +1;
293 gp
= smalloc(n_VSTRUCT_SIZEOF(struct a_lex_ghost
, lg_name
) + nl
+ cl
);
294 gp
->lg_next
= a_lex_ghosts
;
296 memcpy(gp
->lg_name
, argv
[0], nl
);
297 cp
= gp
->lg_cmd
.s
= gp
->lg_name
+ nl
;
300 while(*++argv
!= NULL
)
301 if((i
= strlen(*argv
)) > 0){
302 memcpy(cp
, *argv
, i
);
313 a_lex_c_unghost(void *v
){
314 struct a_lex_ghost
*lgp
, *gp
;
315 char const **argv
, *cp
;
322 while((cp
= *argv
++) != NULL
){
323 if(cp
[0] == '*' && cp
[1] == '\0'){
324 while((gp
= a_lex_ghosts
) != NULL
){
325 a_lex_ghosts
= gp
->lg_next
;
329 for(lgp
= NULL
, gp
= a_lex_ghosts
; gp
!= NULL
;
330 lgp
= gp
, gp
= gp
->lg_next
)
331 if(!strcmp(gp
->lg_name
, cp
)){
333 lgp
->lg_next
= gp
->lg_next
;
335 a_lex_ghosts
= gp
->lg_next
;
339 n_err(_("`unghost': no such alias: %s\n"),
340 n_shexp_quote_cp(cp
, FAL0
));
350 a_lex_c_list(void *v
){
352 struct a_lex_cmd
const **cpa
, *cp
, **cursor
;
356 i
= n_NELEM(a_lex_cmd_tab
) + n_NELEM(a_lex_special_cmd_tab
) +1;
357 cpa
= salloc(sizeof(cp
) * i
);
359 for(i
= 0; i
< n_NELEM(a_lex_cmd_tab
); ++i
)
360 cpa
[i
] = &a_lex_cmd_tab
[i
];
364 for(j
= 0; j
< n_NELEM(a_lex_special_cmd_tab
); ++i
, ++j
)
365 cpa
[i
] = &a_lex_special_cmd_tab
[j
];
373 qsort(cpa
, i
, sizeof(xcp
), &a_lex__pcmd_cmp
);
376 if((fp
= Ftmp(NULL
, "list", OF_RDWR
| OF_UNLINK
| OF_REGISTER
)) == NULL
)
379 fprintf(fp
, _("Commands are:\n"));
381 for(i
= 0, cursor
= cpa
; (cp
= *cursor
++) != NULL
;){
382 if(cp
->lc_func
== &c_cmdnotsupp
)
384 if(options
& OPT_D_V
){
387 switch(cp
->lc_argtype
& ARG_ARGMASK
){
388 case ARG_MSGLIST
: argt
= N_("message-list"); break;
389 case ARG_STRLIST
: argt
= N_("a \"string\""); break;
390 case ARG_RAWLIST
: argt
= N_("old-style quoting"); break;
391 case ARG_NOLIST
: argt
= N_("no arguments"); break;
392 case ARG_NDMLIST
: argt
= N_("message-list (without a default)"); break;
393 case ARG_WYSHLIST
: argt
= N_("sh(1)ell-style quoting"); break;
394 default: argt
= N_("`wysh' for sh(1)ell-style quoting"); break;
396 #ifdef HAVE_DOCSTRINGS
397 fprintf(fp
, _("`%s'. Argument type: %s.\n\t%s\n"),
398 cp
->lc_name
, V_(argt
), V_(cp
->lc_doc
));
401 fprintf(fp
, "`%s' (%s)\n", cp
->lc_name
, argt
);
405 size_t j
= strlen(cp
->lc_name
) + 2;
412 fprintf(fp
, (*cursor
!= NULL
? "%s, " : "%s\n"), cp
->lc_name
);
417 page_or_print(fp
, l
);
425 a_lex__pcmd_cmp(void const *s1
, void const *s2
){
426 struct a_lex_cmd
const * const *cp1
, * const *cp2
;
432 rv
= strcmp((*cp1
)->lc_name
, (*cp2
)->lc_name
);
438 a_lex_c_help(void *v
){
443 /* Help for a single command? */
444 if((arg
= *(char**)v
) != NULL
){
445 struct a_lex_ghost
const *gp
;
446 struct a_lex_cmd
const *cp
, *cpmax
;
448 /* Ghosts take precedence */
449 for(gp
= a_lex_ghosts
; gp
!= NULL
; gp
= gp
->lg_next
)
450 if(!strcmp(arg
, gp
->lg_name
)){
451 printf("%s -> ", arg
);
456 cpmax
= &(cp
= a_lex_cmd_tab
)[n_NELEM(a_lex_cmd_tab
)];
458 for(; PTRCMP(cp
, <, cpmax
); ++cp
){
459 #ifdef HAVE_DOCSTRINGS
460 # define a_DS V_(cp->lc_doc)
462 # define a_DS n_empty
464 if(!strcmp(arg
, cp
->lc_name
))
465 printf("%s: %s", arg
, a_DS
);
466 else if(is_prefix(arg
, cp
->lc_name
))
467 printf("%s (%s): %s", arg
, cp
->lc_name
, a_DS
);
471 if(options
& OPT_D_V
){
474 switch(cp
->lc_argtype
& ARG_ARGMASK
){
475 case ARG_MSGLIST
: atp
= N_("message-list"); break;
476 case ARG_STRLIST
: atp
= N_("a \"string\""); break;
477 case ARG_RAWLIST
: atp
= N_("old-style quoting"); break;
478 case ARG_NOLIST
: atp
= N_("no arguments"); break;
479 case ARG_NDMLIST
: atp
= N_("message-list (no default)"); break;
480 case ARG_WYSHLIST
: atp
= N_("sh(1)ell-style quoting"); break;
481 default: atp
= N_("`wysh' for sh(1)ell-style quoting"); break;
483 #ifdef HAVE_DOCSTRINGS
484 printf(_("\n\tArgument type: %s"), V_(atp
));
486 printf(_("argument type: %s"), V_(atp
));
495 if(PTRCMP(cpmax
, ==, &a_lex_cmd_tab
[n_NELEM(a_lex_cmd_tab
)])){
496 cpmax
= &(cp
= a_lex_special_cmd_tab
)[n_NELEM(a_lex_special_cmd_tab
)];
501 printf("%s\n", n_shexp_quote_cp(arg
, TRU1
));
504 n_err(_("Unknown command: `%s'\n"), arg
);
508 /* Very ugly, but take care for compiler supported string lengths :( */
509 fputs(progname
, stdout
);
511 " commands -- <msglist> denotes message specifications,\n"
512 "e.g., 1-5, :n or ., separated by spaces:\n"), stdout
);
515 "type <msglist> type (alias: `print') messages (honour `retain' etc.)\n"
516 "Type <msglist> like `type' but always show all headers\n"
517 "next goto and type next message\n"
518 "from <msglist> (search and) print header summary for the given list\n"
519 "headers header summary for messages surrounding \"dot\"\n"
520 "delete <msglist> delete messages (can be `undelete'd)\n"),
525 "save <msglist> folder append messages to folder and mark as saved\n"
526 "copy <msglist> folder like `save', but don't mark them (`move' moves)\n"
527 "write <msglist> file write message contents to file (prompts for parts)\n"
528 "Reply <msglist> reply to message senders only\n"
529 "reply <msglist> like `Reply', but address all recipients\n"
530 "Lreply <msglist> forced mailing-list `reply' (see `mlist')\n"),
535 "mail <recipients> compose a mail for the given recipients\n"
536 "file folder change to another mailbox\n"
537 "File folder like `file', but open readonly\n"
538 "quit quit and apply changes to the current mailbox\n"
539 "xit or exit like `quit', but discard changes\n"
540 "!shell command shell escape\n"
541 "list [<anything>] all available commands [in search order]\n"),
544 rv
= (ferror(stdout
) != 0);
552 a_lex_c_quit(void *v
){
556 /* If we are PS_SOURCING, then return 1 so _evaluate() can handle it.
557 * Otherwise return -1 to abort command loop */
564 a_lex_c_version(void *v
){
567 char const *cp
, **arr
;
572 printf(_("%s version %s\nFeatures included (+) or not (-)\n"),
573 uagent
, ok_vlook(version
));
575 /* *features* starts with dummy byte to avoid + -> *folder* expansions */
576 i
= strlen(cp
= &ok_vlook(features
)[1]) +1;
580 arr
= salloc(sizeof(cp
) * VAL_FEATURES_CNT
);
581 for(longest
= 0, i
= 0; (cp
= n_strsep(&iop
, ',', TRU1
)) != NULL
; ++i
){
584 longest
= n_MAX(longest
, (int)i2
);
586 qsort(arr
, i
, sizeof(cp
), &a_lex__version_cmp
);
588 for(++longest
, i2
= 0; i
-- > 0;){
590 printf("%-*s ", longest
, cp
);
592 if(UICMP(z
, ++i2
+ longest
, >=, scrnwidth
) || i
== 0){
598 if((rv
= ferror(stdout
) != 0))
605 a_lex__version_cmp(void const *s1
, void const *s2
){
606 char const * const *cp1
, * const *cp2
;
612 rv
= strcmp(&(*cp1
)[1], &(*cp2
)[1]);
618 a_lex_update_pstate(void){
621 if(pstate
& PS_SIGWINCH_PEND
){
624 snprintf(buf
, sizeof buf
, "%d", scrnwidth
);
625 ok_vset(COLUMNS
, buf
);
626 snprintf(buf
, sizeof buf
, "%d", scrnheight
);
630 pstate
&= ~PS_PSTATE_PENDMASK
;
635 a_lex_evaluate(struct a_lex_eval_ctx
*evp
){
636 /* xxx old style(9), but also old code */
638 char _wordbuf
[2], *arglist
[MAXARGC
], *cp
, *word
;
639 struct a_lex_ghost
*gp
;
640 struct a_lex_cmd
const *cmd
;
649 line
= evp
->le_line
; /* XXX don't change original (buffer pointer) */
650 assert(line
.s
[line
.l
] == '\0');
651 evp
->le_add_history
= FAL0
;
652 evp
->le_new_content
= NULL
;
654 /* Command ghosts that refer to shell commands or macro expansion restart */
657 /* Strip the white space away from end and beginning of command */
661 for(cp
= &line
.s
[i
-1]; spacechar(*cp
); --cp
)
665 for(cp
= line
.s
; spacechar(*cp
); ++cp
)
667 line
.l
-= PTR2SIZE(cp
- line
.s
);
669 /* Ignore null commands (comments) */
673 /* Handle ! differently to get the correct lexical conventions */
677 /* Isolate the actual command; since it may not necessarily be
678 * separated from the arguments (as in `p1') we need to duplicate it to
679 * be able to create a NUL terminated version.
680 * We must be aware of several special one letter commands here */
681 else if((cp
= a_lex_isolate(cp
)) == arglist
[0] &&
682 (*cp
== '|' || *cp
== '~' || *cp
== '?'))
684 c
= (int)PTR2SIZE(cp
- arglist
[0]);
686 word
= UICMP(z
, c
, <, sizeof _wordbuf
) ? _wordbuf
: salloc(c
+1);
687 memcpy(word
, arglist
[0], c
);
690 /* Look up the command; if not found, bitch.
691 * Normally, a blank command would map to the first command in the
692 * table; while PS_SOURCING, however, we ignore blank lines to eliminate
693 * confusion; act just the same for ghosts */
695 if((pstate
& PS_ROBOT
) || gp
!= NULL
)
697 cmd
= a_lex_cmd_tab
+ 0;
701 /* XXX It may be the argument parse adjuster */
702 if(!wysh
&& c
== sizeof("wysh") -1 && !asccasecmp(word
, "wysh")){
708 /* If this is the first evaluation, check command ghosts */
710 /* TODO relink list head, so it's sorted on usage over time?
711 * TODO in fact, there should be one hashmap over all commands and ghosts
712 * TODO so that the lookup could be made much more efficient than it is
713 * TODO now (two adjacent list searches! */
714 for(gp
= a_lex_ghosts
; gp
!= NULL
; gp
= gp
->lg_next
)
715 if(!strcmp(word
, gp
->lg_name
)){
720 line
.s
= salloc(i
+ line
.l
+1);
721 memcpy(line
.s
, gp
->lg_cmd
.s
, i
);
722 memcpy(line
.s
+ i
, cp
, line
.l
);
723 line
.s
[i
+= line
.l
] = '\0';
726 line
.s
= gp
->lg_cmd
.s
;
727 line
.l
= gp
->lg_cmd
.l
;
733 if((cmd
= a_lex__firstfit(word
)) == NULL
|| cmd
->lc_func
== &c_cmdnotsupp
){
736 if(!(s
= condstack_isskip()) || (options
& OPT_D_V
))
737 n_err(_("Unknown command%s: `%s'\n"),
738 (s
? _(" (ignored due to `if' condition)") : n_empty
), word
);
748 /* See if we should execute the command -- if a conditional we always
749 * execute it, otherwise, check the state of cond */
751 if(!(cmd
->lc_argtype
& ARG_F
) && condstack_isskip())
754 /* Process the arguments to the command, depending on the type it expects */
755 if(!(cmd
->lc_argtype
& ARG_M
) && (options
& OPT_SENDMODE
)){
756 n_err(_("May not execute `%s' while sending\n"), cmd
->lc_name
);
759 if((cmd
->lc_argtype
& ARG_S
) && !(pstate
& PS_STARTED
)){
760 n_err(_("May not execute `%s' during startup\n"), cmd
->lc_name
);
763 if((cmd
->lc_argtype
& ARG_I
) &&
764 !(options
& (OPT_INTERACTIVE
| OPT_BATCH_FLAG
))){
765 n_err(_("May not execute `%s' unless interactive or in batch mode\n"),
769 if(cmd
->lc_argtype
& ARG_R
){
770 if(pstate
& PS_RECURSED
){
771 /* TODO PS_RECURSED: should allow `reply' in compose mode: ~:reply! */
772 n_err(_("Cannot invoke `%s' when in compose mode\n"), cmd
->lc_name
);
775 /* TODO Nothing should prevent ARG_R in conjunction with
776 * TODO PS_ROBOT|_SOURCING; see a.._may_yield_control()! */
777 if(pstate
& (PS_ROBOT
| PS_SOURCING
)){
778 n_err(_("Cannot invoke `%s' from a macro or during file inclusion\n"),
784 if((cmd
->lc_argtype
& ARG_W
) && !(mb
.mb_perm
& MB_DELE
)){
785 n_err(_("May not execute `%s' -- message file is read only\n"),
789 if((cmd
->lc_argtype
& ARG_A
) && mb
.mb_type
== MB_VOID
){
790 n_err(_("Cannot execute `%s' without active mailbox\n"), cmd
->lc_name
);
794 if(cmd
->lc_argtype
& ARG_O
)
795 OBSOLETE2(_("this command will be removed"), cmd
->lc_name
);
796 if(cmd
->lc_argtype
& ARG_V
)
797 temporary_arg_v_store
= NULL
;
799 if(wysh
&& (cmd
->lc_argtype
& ARG_ARGMASK
) != ARG_WYRALIST
)
800 n_err(_("`wysh' prefix doesn't affect `%s'\n"), cmd
->lc_name
);
801 /* TODO v15: strip PS_ARGLIST_MASK off, just in case the actual command
802 * TODO doesn't use any of those list commands which strip this mask,
803 * TODO and for now we misuse bits for checking relation to history;
804 * TODO argument state should be property of a per-command carrier instead */
805 pstate
&= ~PS_ARGLIST_MASK
;
806 switch(cmd
->lc_argtype
& ARG_ARGMASK
){
808 /* Message list defaulting to nearest forward legal message */
811 if((c
= getmsglist(cp
, n_msgvec
, cmd
->lc_msgflag
)) < 0)
814 if((n_msgvec
[0] = first(cmd
->lc_msgflag
, cmd
->lc_msgmask
)) != 0)
817 if(n_msgvec
[0] == 0){
818 if(!(pstate
& PS_HOOK_MASK
))
819 printf(_("No applicable messages\n"));
822 e
= (*cmd
->lc_func
)(n_msgvec
);
826 /* Message list with no defaults, but no error if none exist */
827 if(n_msgvec
== NULL
){
829 n_err(_("Invalid use of message list\n"));
832 if((c
= getmsglist(cp
, n_msgvec
, cmd
->lc_msgflag
)) < 0)
834 e
= (*cmd
->lc_func
)(n_msgvec
);
838 /* Just the straight string, with leading blanks removed */
839 while(whitechar(*cp
))
841 e
= (*cmd
->lc_func
)(cp
);
856 if((c
= getrawlist((c
!= 0), arglist
, n_NELEM(arglist
), cp
, line
.l
)) < 0){
857 n_err(_("Invalid argument list\n"));
860 if(c
< cmd
->lc_minargs
){
861 n_err(_("`%s' requires at least %d arg(s)\n"),
862 cmd
->lc_name
, cmd
->lc_minargs
);
866 if(c
> cmd
->lc_maxargs
){
867 n_err(_("`%s' takes no more than %d arg(s)\n"),
868 cmd
->lc_name
, cmd
->lc_maxargs
);
872 e
= (*cmd
->lc_func
)(arglist
);
876 /* Just the constant zero, for exiting, eg. */
877 e
= (*cmd
->lc_func
)(0);
881 DBG( n_panic(_("Implementation error: unknown argument type: %d"),
882 cmd
->lc_argtype
& ARG_ARGMASK
); )
886 if(e
== 0 && (cmd
->lc_argtype
& ARG_V
) &&
887 (cp
= temporary_arg_v_store
) != NULL
){
888 temporary_arg_v_store
= NULL
;
889 evp
->le_new_content
= cp
;
892 if(!(cmd
->lc_argtype
& ARG_H
))
893 evp
->le_add_history
= (((cmd
->lc_argtype
& ARG_G
) ||
894 (pstate
& PS_MSGLIST_GABBY
)) ? TRUM1
: TRU1
);
898 bool_t reset
= !(pstate
& PS_ROOT
);
901 ok_vset(_exit_status
, (e
== 0 ? "0" : "1")); /* TODO num=1 +real value! */
906 /* Exit the current source file on error TODO what a mess! */
908 pstate
&= ~PS_EVAL_ERROR
;
910 pstate
|= PS_EVAL_ERROR
;
911 if(e
< 0 || (pstate
& PS_ROBOT
)){ /* FIXME */
920 if((cmd
->lc_argtype
& ARG_P
) && ok_blook(autoprint
))
922 line
.s
= savestr("type");
923 line
.l
= sizeof("type") -1;
924 gp
= (struct a_lex_ghost
*)-1; /* Avoid `ghost' interpretation */
928 if(!(pstate
& (PS_SOURCING
| PS_HOOK_MASK
)) && !(cmd
->lc_argtype
& ARG_T
))
929 pstate
|= PS_SAW_COMMAND
;
931 pstate
&= ~PS_EVAL_ERROR
;
936 fprintf(stderr, "a_lex_evaluate returns %d for <%s>\n",e,line.s);
942 static struct a_lex_cmd
const *
943 a_lex__firstfit(char const *comm
){ /* TODO *hashtable*! linear list search!!! */
944 struct a_lex_cmd
const *cp
;
947 for(cp
= a_lex_cmd_tab
;
948 PTRCMP(cp
, <, &a_lex_cmd_tab
[n_NELEM(a_lex_cmd_tab
)]); ++cp
)
949 if(*comm
== *cp
->lc_name
&& is_prefix(comm
, cp
->lc_name
))
959 NYD_X
; /* Signal handler */
966 a_lex_onintr(int s
){ /* TODO block signals while acting */
967 NYD_X
; /* Signal handler */
970 safe_signal(SIGINT
, a_lex_onintr
);
972 termios_state_reset();
973 close_all_files(); /* FIXME .. of current level ONLU! */
979 a_lex_unstack(TRUM1
);
982 n_err_sighdl(_("Interrupt\n"));
983 safe_signal(SIGPIPE
, a_lex_oldpipe
);
984 siglongjmp(a_lex_srbuf
, 0); /* FIXME get rid */
988 a_lex_unstack(bool_t eval_error
){
989 struct a_lex_input_stack
*lip
;
992 if((lip
= a_lex_input
) == NULL
){
995 /* If called from a_lex_onintr(), be silent FIXME */
996 pstate
&= ~(PS_SOURCING
| PS_ROBOT
);
997 if(eval_error
== TRUM1
|| !(pstate
& PS_STARTED
))
1002 if(lip
->li_flags
& a_LEX_SLICE
){ /* TODO Temporary hack */
1003 stdin
= lip
->li_slice_stdin
;
1004 stdout
= lip
->li_slice_stdout
;
1005 options
= lip
->li_slice_options
;
1006 goto jthe_slice_hack
;
1009 if(lip
->li_flags
& a_LEX_MACRO
){
1010 if(lip
->li_flags
& a_LEX_MACRO_FREE_DATA
){
1013 while(*(lp
= &lip
->li_lines
[lip
->li_loff
]) != NULL
){
1017 /* Part of lip's memory chunk, then */
1018 if(!(lip
->li_flags
& a_LEX_MACRO_CMD
))
1019 free(lip
->li_lines
);
1022 if(lip
->li_flags
& a_LEX_PIPE
)
1023 /* XXX command manager should -TERM then -KILL instead of hoping
1024 * XXX for exit of provider due to EPIPE / SIGPIPE */
1025 Pclose(lip
->li_file
, TRU1
);
1027 Fclose(lip
->li_file
);
1030 if(!condstack_take(lip
->li_cond
)){
1031 n_err(_("Unmatched `if' at end of %s %s\n"),
1032 ((lip
->li_flags
& a_LEX_MACRO
1033 ? (lip
->li_flags
& a_LEX_MACRO_CMD
? _("command") : _("macro"))
1034 : _("`source'd file"))),
1039 n_memory_autorec_pop(&lip
->li_autorecmem
[0]);
1042 if(lip
->li_on_finalize
!= NULL
)
1043 (*lip
->li_on_finalize
)(lip
->li_finalize_arg
);
1045 if((a_lex_input
= lip
->li_outer
) == NULL
){
1046 pstate
&= ~(PS_SOURCING
| PS_ROBOT
);
1048 if((a_lex_input
->li_flags
& (a_LEX_MACRO
| a_LEX_SUPER_MACRO
)) ==
1049 (a_LEX_MACRO
| a_LEX_SUPER_MACRO
))
1050 pstate
&= ~PS_SOURCING
;
1051 assert(pstate
& PS_ROBOT
);
1057 if(lip
!= NULL
&& (lip
->li_flags
& a_LEX_FREE
))
1059 if(n_UNLIKELY(a_lex_input
!= NULL
&& eval_error
== TRUM1
))
1060 a_lex_unstack(TRUM1
);
1066 if(options
& OPT_D_V
)
1067 n_alert(_("Stopped %s %s due to errors%s"),
1068 (pstate
& PS_STARTED
1069 ? (lip
->li_flags
& a_LEX_SLICE
? _("sliced in program")
1070 : (lip
->li_flags
& a_LEX_MACRO
1071 ? (lip
->li_flags
& a_LEX_MACRO_CMD
1072 ? _("evaluating command") : _("evaluating macro"))
1073 : (lip
->li_flags
& a_LEX_PIPE
1074 ? _("executing `source'd pipe")
1075 : _("loading `source'd file")))
1077 : (lip
->li_flags
& a_LEX_MACRO
1078 ? (lip
->li_flags
& a_LEX_MACRO_X_OPTION
1079 ? _("evaluating command line") : _("evaluating macro"))
1080 : _("loading initialization resource"))),
1082 (options
& OPT_DEBUG
? n_empty
: _(" (enable *debug* for trace)")));
1085 if(!(options
& OPT_INTERACTIVE
) && !(pstate
& PS_STARTED
)){
1086 if(options
& OPT_D_V
)
1087 n_alert(_("Non-interactive, bailing out due to errors "
1088 "in startup load phase"));
1095 a_lex_source_file(char const *file
, bool_t silent_error
){
1096 struct a_lex_input_stack
*lip
;
1105 /* Being a command argument file is space-trimmed *//* TODO v15 with
1106 * TODO WYRALIST this is no longer necessary true, and for that we
1107 * TODO don't set _PARSE_TRIMSPACE because we cannot! -> cmd_tab.h!! */
1109 ((ispipe
= (!silent_error
&& (nlen
= strlen(file
)) > 0 &&
1110 file
[--nlen
] == '|')))
1114 for(nlen
= strlen(file
); nlen
> 0;){
1120 nbuf
= savestrbuf(file
, nlen
);
1129 if((fip
= Popen(nbuf
/* #if 0 above = savestrbuf(file, nlen)*/, "r",
1130 ok_vlook(SHELL
), NULL
, COMMAND_FD_NULL
)) == NULL
){
1131 if(!silent_error
|| (options
& OPT_D_V
))
1135 }else if((nbuf
= fexpand(file
, FEXP_LOCAL
)) == NULL
)
1137 else if((fip
= Fopen(nbuf
, "r")) == NULL
){
1138 if(!silent_error
|| (options
& OPT_D_V
))
1143 lip
= smalloc(n_VSTRUCT_SIZEOF(struct a_lex_input_stack
, li_name
) +
1144 (nlen
= strlen(nbuf
) +1));
1145 memset(lip
, 0, n_VSTRUCT_SIZEOF(struct a_lex_input_stack
, li_name
));
1146 lip
->li_outer
= a_lex_input
;
1148 lip
->li_cond
= condstack_release();
1149 n_memory_autorec_push(&lip
->li_autorecmem
[0]);
1150 lip
->li_flags
= (ispipe
? a_LEX_FREE
| a_LEX_PIPE
: a_LEX_FREE
) |
1151 (a_lex_input
!= NULL
&& (a_lex_input
->li_flags
& a_LEX_SUPER_MACRO
)
1152 ? a_LEX_SUPER_MACRO
: 0);
1153 memcpy(lip
->li_name
, nbuf
, nlen
);
1155 pstate
|= PS_SOURCING
| PS_ROBOT
;
1157 a_commands_recursive(n_LEXINPUT_NONE
| n_LEXINPUT_NL_ESC
);
1158 /* FIXME return TRUM1 if file can't be opened, FAL0 on eval error */
1161 return silent_error
? TRU1
: (fip
!= NULL
);
1165 a_lex_load(struct a_lex_input_stack
*lip
){
1169 assert(!(pstate
& PS_STARTED
));
1170 assert(a_lex_input
== NULL
);
1173 * Any errors in the start-up file shall either cause mailx to terminate
1174 * with a diagnostic message and a non-zero status or to continue after
1175 * writing a diagnostic message, ignoring the remainder of the lines in
1176 * the start-up file. */
1177 lip
->li_cond
= condstack_release();
1178 n_memory_autorec_push(&lip
->li_autorecmem
[0]);
1180 /* FIXME won't work for now (PS_ROBOT needs PS_SOURCING anyway)
1181 pstate |= PS_ROBOT |
1182 (lip->li_flags & a_LEX_MACRO_X_OPTION ? 0 : PS_SOURCING);
1184 pstate
|= PS_ROBOT
| PS_SOURCING
;
1185 if(options
& OPT_D_V
)
1186 n_err(_("Loading %s\n"), n_shexp_quote_cp(lip
->li_name
, FAL0
));
1188 if(!(rv
= n_commands())){
1189 if(!(options
& OPT_INTERACTIVE
)){
1190 if(options
& OPT_D_V
)
1191 n_alert(_("Non-interactive program mode, forced exit"));
1195 /* PS_EXIT handled by callers */
1201 a_lex__cmdrecint(int sig
){ /* TODO one day, we don't need it no more */
1202 NYD_X
; /* Signal handler */
1204 siglongjmp(a_lex_input
->li_cmdrec_jmp
, 1);
1208 a_commands_recursive(enum n_lexinput_flags lif
){
1209 volatile int hadint
; /* TODO get rid of shitty signal stuff (see signal.c) */
1210 sighandler_type soldhdl
;
1211 sigset_t sintset
, soldset
;
1212 struct a_lex_eval_ctx ev
;
1216 memset(&ev
, 0, sizeof ev
);
1218 sigfillset(&sintset
);
1219 sigprocmask(SIG_BLOCK
, &sintset
, &soldset
);
1221 if((soldhdl
= safe_signal(SIGINT
, SIG_IGN
)) != SIG_IGN
){
1222 safe_signal(SIGINT
, &a_lex__cmdrecint
);
1223 if(sigsetjmp(a_lex_input
->li_cmdrec_jmp
, 1)){
1228 sigprocmask(SIG_SETMASK
, &soldset
, NULL
);
1230 n_COLOUR( n_colour_env_push(); )
1235 /* Read a line of commands and handle end of file specially */
1236 ev
.le_line
.l
= ev
.le_line_size
;
1237 n
= n_lex_input(lif
, NULL
, &ev
.le_line
.s
, &ev
.le_line
.l
,
1239 ev
.le_line_size
= (ui32_t
)ev
.le_line
.l
;
1240 ev
.le_line
.l
= (ui32_t
)n
;
1245 if(a_lex_evaluate(&ev
)){
1251 if((options
& OPT_BATCH_FLAG
) && ok_blook(batch_exit_on_error
)){
1252 if(exit_status
!= EXIT_OK
)
1258 n_COLOUR( n_colour_env_pop(FAL0
); )
1260 if(ev
.le_line
.s
!= NULL
)
1263 if(soldhdl
!= SIG_IGN
)
1264 safe_signal(SIGINT
, soldhdl
);
1267 sigprocmask(SIG_SETMASK
, &soldset
, NULL
);
1274 n_commands(void){ /* FIXME */
1275 struct a_lex_eval_ctx ev
;
1282 if (!(pstate
& PS_SOURCING
)) {
1283 if (safe_signal(SIGINT
, SIG_IGN
) != SIG_IGN
)
1284 safe_signal(SIGINT
, &a_lex_onintr
);
1285 if (safe_signal(SIGHUP
, SIG_IGN
) != SIG_IGN
)
1286 safe_signal(SIGHUP
, &a_lex_hangup
);
1288 a_lex_oldpipe
= safe_signal(SIGPIPE
, SIG_IGN
);
1289 safe_signal(SIGPIPE
, a_lex_oldpipe
);
1291 memset(&ev
, 0, sizeof ev
);
1293 (void)sigsetjmp(a_lex_srbuf
, 1); /* FIXME get rid */
1295 char *temporary_orig_line
; /* XXX eval_ctx.le_line not yet constant */
1297 n_COLOUR( n_colour_env_pop(TRU1
); )
1299 /* TODO Unless we have our signal manager (or however we do it) child
1300 * TODO processes may have time slots where their execution isn't
1301 * TODO protected by signal handlers (in between start and setup
1302 * TODO completed). close_all_files() is only called from onintr()
1303 * TODO so those may linger possibly forever */
1304 if(!(pstate
& PS_SOURCING
))
1311 if (!(pstate
& PS_SOURCING
)) {
1314 /* TODO Note: this buffer may contain a password. We should redefine
1315 * TODO the code flow which has to do that */
1316 if ((cp
= termios_state
.ts_linebuf
) != NULL
) {
1317 termios_state
.ts_linebuf
= NULL
;
1318 termios_state
.ts_linesize
= 0;
1319 free(cp
); /* TODO pool give-back */
1321 /* TODO Due to expand-on-tab of NCL the buffer may grow */
1322 if (ev
.le_line
.l
> LINESIZE
* 3) {
1323 free(ev
.le_line
.s
); /* TODO pool! but what? */
1324 ev
.le_line
.s
= NULL
;
1325 ev
.le_line
.l
= ev
.le_line_size
= 0;
1329 if (!(pstate
& PS_SOURCING
) && (options
& OPT_INTERACTIVE
)) {
1332 cp
= ok_vlook(newmail
);
1333 if ((options
& OPT_TTYIN
) && cp
!= NULL
) {
1336 /* FIXME TEST WITH NOPOLL ETC. !!! */
1337 n
= (cp
!= NULL
&& strcmp(cp
, "nopoll"));
1338 if ((mb
.mb_type
== MB_FILE
&& !stat(mailname
, &st
) &&
1339 st
.st_size
> mailsize
) ||
1340 (mb
.mb_type
== MB_MAILDIR
&& n
!= 0)) {
1341 size_t odot
= PTR2SIZE(dot
- message
);
1342 ui32_t odid
= (pstate
& PS_DID_PRINT_DOT
);
1344 if (setfile(mailname
,
1346 ((mb
.mb_perm
& MB_DELE
) ? 0 : FEDIT_RDONLY
)) < 0) {
1347 exit_status
|= EXIT_ERR
;
1351 dot
= message
+ odot
;
1356 exit_status
= EXIT_OK
;
1359 /* Read a line of commands and handle end of file specially */
1361 ev
.le_line
.l
= ev
.le_line_size
;
1362 n
= n_lex_input(n_LEXINPUT_CTX_DEFAULT
| n_LEXINPUT_NL_ESC
, NULL
,
1363 &ev
.le_line
.s
, &ev
.le_line
.l
, ev
.le_new_content
);
1364 ev
.le_line_size
= (ui32_t
)ev
.le_line
.l
;
1365 ev
.le_line
.l
= (ui32_t
)n
;
1368 /* FIXME did unstack() when PS_SOURCING, only break with PS_LOADING*/
1369 if (!(pstate
& PS_ROBOT
) &&
1370 (options
& OPT_INTERACTIVE
) && ok_blook(ignoreeof
)) {
1371 printf(_("*ignoreeof* set, use `quit' to quit.\n"));
1372 n_msleep(500, FAL0
);
1378 temporary_orig_line
= ((pstate
& PS_SOURCING
) ||
1379 !(options
& OPT_INTERACTIVE
)) ? NULL
1380 : savestrbuf(ev
.le_line
.s
, ev
.le_line
.l
);
1381 pstate
&= ~PS_HOOK_MASK
;
1382 if (a_lex_evaluate(&ev
)) {
1383 if (!(pstate
& PS_STARTED
)) /* TODO mess; join PS_EVAL_ERROR.. */
1388 if ((options
& OPT_BATCH_FLAG
) && ok_blook(batch_exit_on_error
)) {
1389 if (exit_status
!= EXIT_OK
)
1391 if ((pstate
& (PS_SOURCING
| PS_EVAL_ERROR
)) == PS_EVAL_ERROR
) {
1392 exit_status
= EXIT_ERR
;
1396 if (!(pstate
& PS_SOURCING
) && (options
& OPT_INTERACTIVE
)) {
1397 if (ev
.le_new_content
!= NULL
)
1399 /* *Can* happen since _evaluate() n_unstack()s on error! XXX no more */
1400 if (temporary_orig_line
!= NULL
)
1401 n_tty_addhist(temporary_orig_line
, (ev
.le_add_history
!= TRU1
));
1404 if(pstate
& PS_EXIT
)
1410 if (ev
.le_line
.s
!= NULL
)
1417 (n_lex_input
)(enum n_lexinput_flags lif
, char const *prompt
, char **linebuf
,
1418 size_t *linesize
, char const *string n_MEMORY_DEBUG_ARGS
){
1419 /* TODO readline: linebuf pool!; n_lex_input should return si64_t */
1420 struct n_string xprompt
;
1422 bool_t doprompt
, dotty
;
1427 /* Special case macro mode: never need to prompt, lines have always been
1428 * unfolded already */
1429 if(!(lif
& n_LEXINPUT_FORCE_STDIN
) &&
1430 a_lex_input
!= NULL
&& (a_lex_input
->li_flags
& a_LEX_MACRO
)){
1431 if(*linebuf
!= NULL
)
1434 if((*linebuf
= a_lex_input
->li_lines
[a_lex_input
->li_loff
]) == NULL
){
1440 ++a_lex_input
->li_loff
;
1441 *linesize
= strlen(*linebuf
);
1442 if(!(a_lex_input
->li_flags
& a_LEX_MACRO_FREE_DATA
))
1443 *linebuf
= sbufdup(*linebuf
, *linesize
);
1445 iftype
= (a_lex_input
->li_flags
& a_LEX_MACRO_X_OPTION
)
1447 : (a_lex_input
->li_flags
& a_LEX_MACRO_CMD
) ? "CMD" : "MACRO";
1449 pstate
|= PS_READLINE_NL
;
1452 pstate
&= ~PS_READLINE_NL
;
1454 iftype
= (!(pstate
& PS_STARTED
) ? "LOAD"
1455 : (pstate
& PS_SOURCING
) ? "SOURCE" : "READ");
1456 doprompt
= ((pstate
& (PS_STARTED
| PS_ROBOT
)) == PS_STARTED
&&
1457 (options
& OPT_INTERACTIVE
));
1458 dotty
= (doprompt
&& !ok_blook(line_editor_disable
));
1460 lif
|= n_LEXINPUT_PROMPT_NONE
;
1463 n_string_creat_auto(&xprompt
);
1465 lif
|= n_LEXINPUT_PROMPT_EVAL
;
1468 /* Ensure stdout is flushed first anyway */
1469 if(!dotty
&& (lif
& n_LEXINPUT_PROMPT_NONE
))
1472 ifile
= (a_lex_input
!= NULL
) ? a_lex_input
->li_file
: stdin
;
1473 assert(ifile
!= NULL
);
1475 for(nold
= n
= 0;;){
1477 assert(ifile
== stdin
);
1478 if(string
!= NULL
&& (n
= (int)strlen(string
)) > 0){
1482 *linesize
= (size_t)n
+ LINESIZE
+1;
1483 *linebuf
= (n_realloc
)(*linebuf
, *linesize n_MEMORY_DEBUG_ARGSCALL
);
1484 memcpy(*linebuf
, string
, (size_t)n
+1);
1487 /* TODO if nold>0, don't redisplay the entire line!
1488 * TODO needs complete redesign ... */
1489 n
= (n_tty_readline
)(lif
, prompt
, linebuf
, linesize
, n
1490 n_MEMORY_DEBUG_ARGSCALL
);
1492 if(!(lif
& n_LEXINPUT_PROMPT_NONE
)){
1493 n_tty_create_prompt(&xprompt
, prompt
, lif
);
1494 if(xprompt
.s_len
> 0){
1495 fwrite(xprompt
.s_dat
, 1, xprompt
.s_len
, stdout
);
1500 n
= (readline_restart
)(ifile
, linebuf
, linesize
, n
1501 n_MEMORY_DEBUG_ARGSCALL
);
1503 if(n
> 0 && nold
> 0){
1505 char const *cp
= *linebuf
+ nold
;
1507 while(blankspacechar(*cp
) && nold
+ i
< n
)
1510 memmove(*linebuf
+ nold
, cp
, n
- nold
- i
);
1512 (*linebuf
)[n
] = '\0';
1521 * An unquoted <backslash> at the end of a command line shall
1522 * be discarded and the next line shall continue the command */
1523 if(!(lif
& n_LEXINPUT_NL_ESC
) || (*linebuf
)[n
- 1] != '\\'){
1525 pstate
|= PS_READLINE_NL
;
1528 /* Definitely outside of quotes, thus the quoting rules are so that an
1529 * uneven number of successive backslashs at EOL is a continuation */
1533 for(j
= 1, i
= (size_t)n
- 1; i
-- > 0; ++j
)
1534 if((*linebuf
)[i
] != '\\')
1539 (*linebuf
)[nold
= --n
] = '\0';
1540 lif
|= n_LEXINPUT_NL_FOLLOW
;
1545 (*linebuf
)[*linesize
= n
] = '\0';
1549 if(lif
& n_LEXINPUT_DROP_TRAIL_SPC
){
1553 for(cp
= &(*linebuf
)[i
= (size_t)n
];; --i
){
1555 if(!blankspacechar(c
))
1558 (*linebuf
)[n
= (int)i
] = '\0';
1561 if(lif
& n_LEXINPUT_DROP_LEAD_SPC
){
1565 for(cp
= &(*linebuf
)[0], j
= (size_t)n
, i
= 0; i
< j
; ++i
){
1567 if(!blankspacechar(c
))
1571 memcpy(&(*linebuf
)[0], &(*linebuf
)[i
], j
-= i
);
1572 (*linebuf
)[n
= (int)j
] = '\0';
1575 #endif /* 0 (notyet - must take care for backslash escaped space) */
1577 if(options
& OPT_D_VV
)
1578 n_err(_("%s %d bytes <%s>\n"), iftype
, n
, *linebuf
);
1580 if (pstate
& PS_PSTATE_PENDMASK
)
1581 a_lex_update_pstate();
1583 /* TODO We need to special case a_LEX_SLICE, since that is not managed by us
1584 * TODO but only established from the outside and we need to drop this
1585 * TODO overlay context somehow */
1586 if(n
< 0 && a_lex_input
!= NULL
&& (a_lex_input
->li_flags
& a_LEX_SLICE
))
1587 a_lex_unstack(FAL0
);
1593 n_lex_input_cp(enum n_lexinput_flags lif
, char const *prompt
,
1594 char const *string
){
1595 /* FIXME n_lex_input_cp_addhist(): leaks on sigjmp without linepool */
1605 n
= n_lex_input(lif
, prompt
, &linebuf
, &linesize
, string
);
1606 if(n
> 0 && *(rv
= savestrbuf(linebuf
, (size_t)n
)) != '\0' &&
1607 (lif
& n_LEXINPUT_HIST_ADD
) && (options
& OPT_INTERACTIVE
))
1608 n_tty_addhist(rv
, ((lif
& n_LEXINPUT_HIST_GABBY
) != 0));
1617 c_read(void *v
){ /* TODO IFS? how? -r */
1618 char const **argv
, *cp
, *cp2
;
1623 for(argv
= v
; (cp
= *argv
++) != NULL
;)
1624 if(!n_shexp_is_valid_varname(cp
)){
1625 n_err(_("`read': not a valid variable name: %s\n"),
1626 n_shexp_quote_cp(cp
, FAL0
));
1632 cp
= n_lex_input_cp(((pstate
& PS_RECURSED
/* TODO this IS compose-mode! */
1633 ? n_LEXINPUT_CTX_COMPOSE
: n_LEXINPUT_CTX_DEFAULT
) |
1634 n_LEXINPUT_FORCE_STDIN
| n_LEXINPUT_NL_ESC
|
1635 n_LEXINPUT_PROMPT_NONE
/* XXX POSIX: PS2: yes! */),
1640 for(argv
= v
; *argv
!= NULL
; ++argv
){
1643 while(blankchar(*cp
))
1648 /* The last variable gets the remaining line less trailing IFS */
1649 if(argv
[1] == NULL
){
1650 for(cp2
= cp
; *cp2
!= '\0'; ++cp2
)
1652 for(; cp2
> cp
; --cp2
){
1658 for(cp2
= cp
; (c
= *++cp2
) != '\0';)
1662 vok_vset(*argv
, savestrbuf(cp
, PTR2SIZE(cp2
- cp
)));
1666 /* Set the remains to the empty string */
1667 for(; *argv
!= NULL
; ++argv
)
1668 vok_vset(*argv
, "");
1677 n_load(char const *name
){
1678 struct a_lex_input_stack
*lip
;
1683 if(name
== NULL
|| *name
== '\0' || (fip
= Fopen(name
, "r")) == NULL
)
1686 i
= strlen(name
) +1;
1687 lip
= smalloc(n_VSTRUCT_SIZEOF(struct a_lex_input_stack
, li_name
) + i
);
1688 memset(lip
, 0, n_VSTRUCT_SIZEOF(struct a_lex_input_stack
, li_name
));
1690 lip
->li_flags
= a_LEX_FREE
;
1691 memcpy(lip
->li_name
, name
, i
);
1700 n_load_Xargs(char const **lines
, size_t cnt
){
1701 static char const name
[] = "-X";
1703 ui8_t buf
[sizeof(struct a_lex_input_stack
) + sizeof name
];
1704 char const *srcp
, *xsrcp
;
1706 size_t imax
, i
, len
;
1707 struct a_lex_input_stack
*lip
;
1711 memset(lip
, 0, n_VSTRUCT_SIZEOF(struct a_lex_input_stack
, li_name
));
1712 lip
->li_flags
= a_LEX_MACRO
| a_LEX_MACRO_FREE_DATA
|
1713 a_LEX_MACRO_X_OPTION
| a_LEX_SUPER_MACRO
;
1714 memcpy(lip
->li_name
, name
, sizeof name
);
1716 /* The problem being that we want to support reverse solidus newline
1717 * escaping also within multiline -X, i.e., POSIX says:
1718 * An unquoted <backslash> at the end of a command line shall
1719 * be discarded and the next line shall continue the command
1720 * Therefore instead of "lip->li_lines = n_UNCONST(lines)", duplicate the
1721 * entire lines array and set _MACRO_FREE_DATA */
1723 lip
->li_lines
= smalloc(sizeof(*lip
->li_lines
) * imax
);
1725 /* For each of the input lines.. */
1726 for(i
= len
= 0, cp
= NULL
; cnt
> 0;){
1730 if((j
= strlen(srcp
= *lines
)) == 0){
1735 /* Separate one line from a possible multiline input string */
1736 if((xsrcp
= memchr(srcp
, '\n', j
)) != NULL
){
1738 j
= PTR2SIZE(xsrcp
- srcp
);
1742 /* The (separated) string may itself indicate soft newline escaping */
1743 if((keep
= (srcp
[j
- 1] == '\\'))){
1746 /* Need an uneven number of reverse solidus */
1747 for(xk
= 1, xj
= j
- 1; xj
-- > 0; ++xk
)
1748 if(srcp
[xj
] != '\\')
1756 /* Strip any leading WS from follow lines, then */
1758 while(j
> 0 && blankspacechar(*srcp
))
1762 if(i
+ 2 >= imax
){ /* TODO need a vector (main.c, here, ++) */
1764 lip
->li_lines
= n_realloc(lip
->li_lines
, sizeof(*lip
->li_lines
) *
1767 lip
->li_lines
[i
] = cp
= n_realloc(cp
, len
+ j
+1);
1768 memcpy(&cp
[len
], srcp
, j
);
1769 cp
[len
+= j
] = '\0';
1778 assert(i
+ 1 < imax
);
1779 lip
->li_lines
[i
++] = cp
;
1781 lip
->li_lines
[i
] = NULL
;
1784 if(pstate
& PS_EXIT
)
1794 rv
= (a_lex_source_file(*(char**)v
, FAL0
) == TRU1
) ? 0 : 1;
1800 c_source_if(void *v
){ /* XXX obsolete?, support file tests in `if' etc.! */
1804 rv
= (a_lex_source_file(*(char**)v
, TRU1
) != FAL0
) ? 0 : 1;
1810 n_source_macro(enum n_lexinput_flags lif
, char const *name
, char **lines
,
1811 void (*on_finalize
)(void*), void *finalize_arg
){
1812 struct a_lex_input_stack
*lip
;
1817 lip
= smalloc(n_VSTRUCT_SIZEOF(struct a_lex_input_stack
, li_name
) +
1818 (i
= strlen(name
) +1));
1819 memset(lip
, 0, n_VSTRUCT_SIZEOF(struct a_lex_input_stack
, li_name
));
1820 lip
->li_outer
= a_lex_input
;
1821 lip
->li_file
= NULL
;
1822 lip
->li_cond
= condstack_release();
1823 n_memory_autorec_push(&lip
->li_autorecmem
[0]);
1824 lip
->li_flags
= a_LEX_FREE
| a_LEX_MACRO
| a_LEX_MACRO_FREE_DATA
|
1825 (a_lex_input
== NULL
|| (a_lex_input
->li_flags
& a_LEX_SUPER_MACRO
)
1826 ? a_LEX_SUPER_MACRO
: 0);
1827 lip
->li_lines
= lines
;
1828 lip
->li_on_finalize
= on_finalize
;
1829 lip
->li_finalize_arg
= finalize_arg
;
1830 memcpy(lip
->li_name
, name
, i
);
1834 rv
= a_commands_recursive(lif
);
1840 n_source_command(enum n_lexinput_flags lif
, char const *cmd
){
1841 struct a_lex_input_stack
*lip
;
1849 lip
= smalloc(n_VSTRUCT_SIZEOF(struct a_lex_input_stack
, li_name
) +
1850 ial
+ 2*sizeof(char*));
1851 memset(lip
, 0, n_VSTRUCT_SIZEOF(struct a_lex_input_stack
, li_name
));
1852 lip
->li_outer
= a_lex_input
;
1853 lip
->li_cond
= condstack_release();
1854 n_memory_autorec_push(&lip
->li_autorecmem
[0]);
1855 lip
->li_flags
= a_LEX_FREE
| a_LEX_MACRO
| a_LEX_MACRO_CMD
|
1856 (a_lex_input
== NULL
|| (a_lex_input
->li_flags
& a_LEX_SUPER_MACRO
)
1857 ? a_LEX_SUPER_MACRO
: 0);
1858 lip
->li_lines
= (void*)&lip
->li_name
[ial
];
1859 memcpy(lip
->li_lines
[0] = &lip
->li_name
[0], cmd
, i
);
1860 lip
->li_lines
[1] = NULL
;
1864 rv
= a_commands_recursive(lif
);
1870 n_source_slice_hack(char const *cmd
, FILE *new_stdin
, FILE *new_stdout
,
1871 ui32_t new_options
, void (*on_finalize
)(void*), void *finalize_arg
){
1872 struct a_lex_input_stack
*lip
;
1876 lip
= smalloc(n_VSTRUCT_SIZEOF(struct a_lex_input_stack
, li_name
) +
1877 (i
= strlen(cmd
) +1));
1878 memset(lip
, 0, n_VSTRUCT_SIZEOF(struct a_lex_input_stack
, li_name
));
1879 lip
->li_outer
= a_lex_input
;
1880 lip
->li_file
= new_stdin
;
1881 lip
->li_flags
= a_LEX_FREE
| a_LEX_SLICE
;
1882 lip
->li_on_finalize
= on_finalize
;
1883 lip
->li_finalize_arg
= finalize_arg
;
1884 lip
->li_slice_stdin
= stdin
;
1885 lip
->li_slice_stdout
= stdout
;
1886 lip
->li_slice_options
= options
;
1887 memcpy(lip
->li_name
, cmd
, i
);
1890 stdout
= new_stdout
;
1891 options
= new_options
;
1898 n_source_slice_hack_remove_after_jump(void){
1899 a_lex_unstack(FAL0
);
1903 n_source_may_yield_control(void){
1904 return ((options
& OPT_INTERACTIVE
) &&
1905 (pstate
& PS_STARTED
) &&
1906 (!(pstate
& PS_ROBOT
) ||
1907 /* But: ok for ~:, yet: unless in a hook.
1908 * TODO This is obviously hacky in that it depends on _input_stack not
1909 * TODO loosing any flags when creating new contexts... Maybe this
1910 * TODO function should instead walk all up the context stack when
1911 * TODO there is one, and verify neither level prevents yielding! */
1912 ((pstate
& PS_RECURSED
) && (a_lex_input
== NULL
||
1913 !(a_lex_input
->li_flags
& a_LEX_SLICE
)))) &&
1914 (a_lex_input
== NULL
|| a_lex_input
->li_outer
== NULL
));