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
);
145 static char const *a_lex_cmdinfo(struct a_lex_cmd
const *lcp
);
147 /* Print a list of all commands */
148 static int a_lex_c_list(void *v
);
150 static int a_lex__pcmd_cmp(void const *s1
, void const *s2
);
152 /* `help' / `?' command */
153 static int a_lex_c_help(void *v
);
156 static int a_lex_c_quit(void *v
);
158 /* Print the binaries version number */
159 static int a_lex_c_version(void *v
);
161 static int a_lex__version_cmp(void const *s1
, void const *s2
);
163 /* PS_STATE_PENDMASK requires some actions */
164 static void a_lex_update_pstate(void);
166 /* Evaluate a single command.
167 * .le_add_history and .le_new_content will be updated upon success.
168 * Command functions return 0 for success, 1 for error, and -1 for abort.
169 * 1 or -1 aborts a load or source, a -1 aborts the interactive command loop */
170 static int a_lex_evaluate(struct a_lex_eval_ctx
*evp
);
172 /* Get first-fit, or NULL */
173 static struct a_lex_cmd
const *a_lex__firstfit(char const *comm
);
175 /* Branch here on hangup signal and simulate "exit" */
176 static void a_lex_hangup(int s
);
178 /* The following gets called on receipt of an interrupt. Close all open files
179 * except 0, 1, 2, and the temporary. Also, unstack all source files */
180 static void a_lex_onintr(int s
);
182 /* Pop the current input back to the previous level. Update the program state.
183 * If the argument is TRUM1 then we don't alert and error out if the stack
184 * doesn't exist at all */
185 static void a_lex_unstack(bool_t eval_error
);
187 /* `source' and `source_if' (if silent_error: no pipes allowed, then) */
188 static bool_t
a_lex_source_file(char const *file
, bool_t silent_error
);
190 /* System resource file load()ing or -X command line option array traversal */
191 static bool_t
a_lex_load(struct a_lex_input_stack
*lip
);
193 /* A simplified command loop for recursed state machines */
194 static bool_t
a_commands_recursive(enum n_lexinput_flags lif
);
196 /* List of all commands, and list of commands which are specially treated
197 * and deduced in _evaluate(), but we need a list for _c_list() and
198 * print_comm_docstr() */
199 #ifdef HAVE_DOCSTRINGS
204 static struct a_lex_cmd
const a_lex_cmd_tab
[] = {
207 a_lex_special_cmd_tab
[] = {
209 DS(N_("Comment command: ignore remaining (continuable) line")) },
211 DS(N_("Print out the preceding message")) }
216 a_lex_isolate(char const *comm
){
218 while(*comm
!= '\0' &&
219 strchr("~|? \t0123456789&%@$^.:/-+*'\",;(`", *comm
) == NULL
)
222 return n_UNCONST(comm
);
226 a_lex_c_ghost(void *v
){
227 struct a_lex_ghost
*lgp
, *gp
;
239 if((fp
= Ftmp(NULL
, "ghost", OF_RDWR
| OF_UNLINK
| OF_REGISTER
)) == NULL
)
242 for(i
= 0, gp
= a_lex_ghosts
; gp
!= NULL
; gp
= gp
->lg_next
)
243 fprintf(fp
, "wysh ghost %s %s\n",
244 gp
->lg_name
, n_shexp_quote_cp(gp
->lg_cmd
.s
, TRU1
));
247 page_or_print(fp
, i
);
253 /* Verify the ghost name is a valid one */
254 if(*argv
[0] == '\0' || *a_lex_isolate(argv
[0]) != '\0'){
255 n_err(_("`ghost': can't canonicalize %s\n"),
256 n_shexp_quote_cp(argv
[0], FAL0
));
261 /* Show command of single ghost? */
263 for(gp
= a_lex_ghosts
; gp
!= NULL
; gp
= gp
->lg_next
)
264 if(!strcmp(argv
[0], gp
->lg_name
)){
265 printf("wysh ghost %s %s\n",
266 gp
->lg_name
, n_shexp_quote_cp(gp
->lg_cmd
.s
, TRU1
));
269 n_err(_("`ghost': no such alias: %s\n"), argv
[0]);
274 /* Define command for ghost: verify command content */
275 for(cl
= 0, i
= 1; (cp
= n_UNCONST(argv
[i
])) != NULL
; ++i
)
277 cl
+= strlen(cp
) +1; /* SP or NUL */
279 n_err(_("`ghost': empty command arguments after %s\n"), argv
[0]);
284 /* If the ghost already exists, recreate */
285 for(lgp
= NULL
, gp
= a_lex_ghosts
; gp
!= NULL
; lgp
= gp
, gp
= gp
->lg_next
)
286 if(!strcmp(gp
->lg_name
, argv
[0])){
288 lgp
->lg_next
= gp
->lg_next
;
290 a_lex_ghosts
= gp
->lg_next
;
295 nl
= strlen(argv
[0]) +1;
296 gp
= smalloc(n_VSTRUCT_SIZEOF(struct a_lex_ghost
, lg_name
) + nl
+ cl
);
297 gp
->lg_next
= a_lex_ghosts
;
299 memcpy(gp
->lg_name
, argv
[0], nl
);
300 cp
= gp
->lg_cmd
.s
= gp
->lg_name
+ nl
;
303 while(*++argv
!= NULL
)
304 if((i
= strlen(*argv
)) > 0){
305 memcpy(cp
, *argv
, i
);
316 a_lex_c_unghost(void *v
){
317 struct a_lex_ghost
*lgp
, *gp
;
318 char const **argv
, *cp
;
325 while((cp
= *argv
++) != NULL
){
326 if(cp
[0] == '*' && cp
[1] == '\0'){
327 while((gp
= a_lex_ghosts
) != NULL
){
328 a_lex_ghosts
= gp
->lg_next
;
332 for(lgp
= NULL
, gp
= a_lex_ghosts
; gp
!= NULL
;
333 lgp
= gp
, gp
= gp
->lg_next
)
334 if(!strcmp(gp
->lg_name
, cp
)){
336 lgp
->lg_next
= gp
->lg_next
;
338 a_lex_ghosts
= gp
->lg_next
;
342 n_err(_("`unghost': no such alias: %s\n"),
343 n_shexp_quote_cp(cp
, FAL0
));
353 a_lex_cmdinfo(struct a_lex_cmd
const *lcp
){
354 struct n_string rvb
, *rv
;
358 rv
= n_string_creat_auto(&rvb
);
359 rv
= n_string_reserve(rv
, 80);
361 switch(lcp
->lc_argtype
& ARG_ARGMASK
){
362 case ARG_MSGLIST
: cp
= N_("message-list"); break;
363 case ARG_STRLIST
: cp
= N_("string data"); break;
364 case ARG_RAWLIST
: cp
= N_("old-style quoting"); break;
365 case ARG_NOLIST
: cp
= N_("no arguments"); break;
366 case ARG_NDMLIST
: cp
= N_("message-list (no default)"); break;
367 case ARG_WYSHLIST
: cp
= N_("sh(1)ell-style quoting"); break;
368 default: cp
= N_("`wysh' for sh(1)ell-style quoting"); break;
370 rv
= n_string_push_cp(rv
, V_(cp
));
372 if(lcp
->lc_argtype
& (ARG_A
| ARG_I
| ARG_M
| ARG_R
| ARG_S
| ARG_X
))
373 rv
= n_string_push_buf(rv
, " |", 2);
375 if(lcp
->lc_argtype
& ARG_A
)
376 rv
= n_string_push_cp(rv
, _(" needs box"));
377 if(lcp
->lc_argtype
& ARG_I
)
378 rv
= n_string_push_cp(rv
, _(" only interactive"));
379 if(lcp
->lc_argtype
& ARG_M
)
380 rv
= n_string_push_cp(rv
, _(" send mode"));
381 if(lcp
->lc_argtype
& ARG_R
)
382 rv
= n_string_push_cp(rv
, _(" no compose mode"));
383 if(lcp
->lc_argtype
& ARG_S
)
384 rv
= n_string_push_cp(rv
, _(" after startup"));
385 if(lcp
->lc_argtype
& ARG_X
)
386 rv
= n_string_push_cp(rv
, _(" subprocess"));
388 cp
= n_string_cp(rv
);
394 a_lex_c_list(void *v
){
396 struct a_lex_cmd
const **cpa
, *cp
, **cursor
;
400 i
= n_NELEM(a_lex_cmd_tab
) + n_NELEM(a_lex_special_cmd_tab
) +1;
401 cpa
= salloc(sizeof(cp
) * i
);
403 for(i
= 0; i
< n_NELEM(a_lex_cmd_tab
); ++i
)
404 cpa
[i
] = &a_lex_cmd_tab
[i
];
408 for(j
= 0; j
< n_NELEM(a_lex_special_cmd_tab
); ++i
, ++j
)
409 cpa
[i
] = &a_lex_special_cmd_tab
[j
];
417 qsort(cpa
, i
, sizeof(xcp
), &a_lex__pcmd_cmp
);
420 if((fp
= Ftmp(NULL
, "list", OF_RDWR
| OF_UNLINK
| OF_REGISTER
)) == NULL
)
423 fprintf(fp
, _("Commands are:\n"));
425 for(i
= 0, cursor
= cpa
; (cp
= *cursor
++) != NULL
;){
426 if(cp
->lc_func
== &c_cmdnotsupp
)
428 if(options
& OPT_D_V
){
429 fprintf(fp
, "%s\n", cp
->lc_name
);
431 #ifdef HAVE_DOCSTRINGS
432 fprintf(fp
, " : %s\n", V_(cp
->lc_doc
));
435 fprintf(fp
, " : %s\n", a_lex_cmdinfo(cp
));
438 size_t j
= strlen(cp
->lc_name
) + 2;
445 fprintf(fp
, (*cursor
!= NULL
? "%s, " : "%s\n"), cp
->lc_name
);
450 page_or_print(fp
, l
);
458 a_lex__pcmd_cmp(void const *s1
, void const *s2
){
459 struct a_lex_cmd
const * const *cp1
, * const *cp2
;
465 rv
= strcmp((*cp1
)->lc_name
, (*cp2
)->lc_name
);
471 a_lex_c_help(void *v
){
476 /* Help for a single command? */
477 if((arg
= *(char**)v
) != NULL
){
478 struct a_lex_ghost
const *gp
;
479 struct a_lex_cmd
const *lcp
, *lcpmax
;
481 /* Ghosts take precedence */
482 for(gp
= a_lex_ghosts
; gp
!= NULL
; gp
= gp
->lg_next
)
483 if(!strcmp(arg
, gp
->lg_name
)){
484 printf("%s -> ", arg
);
489 lcpmax
= &(lcp
= a_lex_cmd_tab
)[n_NELEM(a_lex_cmd_tab
)];
491 for(; lcp
< lcpmax
; ++lcp
){
492 if(is_prefix(arg
, lcp
->lc_name
)){
494 if(strcmp(arg
, lcp
->lc_name
))
495 printf(" (%s)", lcp
->lc_name
);
499 #ifdef HAVE_DOCSTRINGS
500 printf(": %s", V_(lcp
->lc_doc
));
502 if(options
& OPT_D_V
)
503 printf("\n : %s", a_lex_cmdinfo(lcp
));
509 if(PTRCMP(lcpmax
, ==, &a_lex_cmd_tab
[n_NELEM(a_lex_cmd_tab
)])){
511 a_lex_special_cmd_tab
)[n_NELEM(a_lex_special_cmd_tab
)];
516 printf("%s\n", n_shexp_quote_cp(arg
, TRU1
));
519 n_err(_("Unknown command: `%s'\n"), arg
);
523 /* Very ugly, but take care for compiler supported string lengths :( */
524 fputs(progname
, stdout
);
526 " commands -- <msglist> denotes message specifications,\n"
527 "e.g., 1-5, :n or ., separated by spaces:\n"), stdout
);
530 "type <msglist> type (alias: `print') messages (honour `retain' etc.)\n"
531 "Type <msglist> like `type' but always show all headers\n"
532 "next goto and type next message\n"
533 "from <msglist> (search and) print header summary for the given list\n"
534 "headers header summary for messages surrounding \"dot\"\n"
535 "delete <msglist> delete messages (can be `undelete'd)\n"),
540 "save <msglist> folder append messages to folder and mark as saved\n"
541 "copy <msglist> folder like `save', but don't mark them (`move' moves)\n"
542 "write <msglist> file write message contents to file (prompts for parts)\n"
543 "Reply <msglist> reply to message senders only\n"
544 "reply <msglist> like `Reply', but address all recipients\n"
545 "Lreply <msglist> forced mailing-list `reply' (see `mlist')\n"),
550 "mail <recipients> compose a mail for the given recipients\n"
551 "file folder change to another mailbox\n"
552 "File folder like `file', but open readonly\n"
553 "quit quit and apply changes to the current mailbox\n"
554 "xit or exit like `quit', but discard changes\n"
555 "!shell command shell escape\n"
556 "list [<anything>] all available commands [in search order]\n"),
559 rv
= (ferror(stdout
) != 0);
567 a_lex_c_quit(void *v
){
571 /* If we are PS_SOURCING, then return 1 so _evaluate() can handle it.
572 * Otherwise return -1 to abort command loop */
579 a_lex_c_version(void *v
){
582 char const *cp
, **arr
;
587 printf(_("%s version %s\nFeatures included (+) or not (-)\n"),
588 uagent
, ok_vlook(version
));
590 /* *features* starts with dummy byte to avoid + -> *folder* expansions */
591 i
= strlen(cp
= &ok_vlook(features
)[1]) +1;
595 arr
= salloc(sizeof(cp
) * VAL_FEATURES_CNT
);
596 for(longest
= 0, i
= 0; (cp
= n_strsep(&iop
, ',', TRU1
)) != NULL
; ++i
){
599 longest
= n_MAX(longest
, (int)i2
);
601 qsort(arr
, i
, sizeof(cp
), &a_lex__version_cmp
);
603 for(++longest
, i2
= 0; i
-- > 0;){
605 printf("%-*s ", longest
, cp
);
607 if(UICMP(z
, ++i2
+ longest
, >=, scrnwidth
) || i
== 0){
613 if((rv
= ferror(stdout
) != 0))
620 a_lex__version_cmp(void const *s1
, void const *s2
){
621 char const * const *cp1
, * const *cp2
;
627 rv
= strcmp(&(*cp1
)[1], &(*cp2
)[1]);
633 a_lex_update_pstate(void){
636 if(pstate
& PS_SIGWINCH_PEND
){
639 snprintf(buf
, sizeof buf
, "%d", scrnwidth
);
640 ok_vset(COLUMNS
, buf
);
641 snprintf(buf
, sizeof buf
, "%d", scrnheight
);
645 pstate
&= ~PS_PSTATE_PENDMASK
;
650 a_lex_evaluate(struct a_lex_eval_ctx
*evp
){
651 /* xxx old style(9), but also old code */
653 char _wordbuf
[2], *arglist
[MAXARGC
], *cp
, *word
;
654 struct a_lex_ghost
*gp
;
655 struct a_lex_cmd
const *cmd
;
664 line
= evp
->le_line
; /* XXX don't change original (buffer pointer) */
665 assert(line
.s
[line
.l
] == '\0');
666 evp
->le_add_history
= FAL0
;
667 evp
->le_new_content
= NULL
;
669 /* Command ghosts that refer to shell commands or macro expansion restart */
672 /* Strip the white space away from end and beginning of command */
676 for(cp
= &line
.s
[i
-1]; spacechar(*cp
); --cp
)
680 for(cp
= line
.s
; spacechar(*cp
); ++cp
)
682 line
.l
-= PTR2SIZE(cp
- line
.s
);
684 /* Ignore null commands (comments) */
688 /* Handle ! differently to get the correct lexical conventions */
692 /* Isolate the actual command; since it may not necessarily be
693 * separated from the arguments (as in `p1') we need to duplicate it to
694 * be able to create a NUL terminated version.
695 * We must be aware of several special one letter commands here */
696 else if((cp
= a_lex_isolate(cp
)) == arglist
[0] &&
697 (*cp
== '|' || *cp
== '~' || *cp
== '?'))
699 c
= (int)PTR2SIZE(cp
- arglist
[0]);
701 word
= UICMP(z
, c
, <, sizeof _wordbuf
) ? _wordbuf
: salloc(c
+1);
702 memcpy(word
, arglist
[0], c
);
705 /* Look up the command; if not found, bitch.
706 * Normally, a blank command would map to the first command in the
707 * table; while PS_SOURCING, however, we ignore blank lines to eliminate
708 * confusion; act just the same for ghosts */
710 if((pstate
& PS_ROBOT
) || gp
!= NULL
)
712 cmd
= a_lex_cmd_tab
+ 0;
716 /* XXX It may be the argument parse adjuster */
717 if(!wysh
&& c
== sizeof("wysh") -1 && !asccasecmp(word
, "wysh")){
723 /* If this is the first evaluation, check command ghosts */
725 /* TODO relink list head, so it's sorted on usage over time?
726 * TODO in fact, there should be one hashmap over all commands and ghosts
727 * TODO so that the lookup could be made much more efficient than it is
728 * TODO now (two adjacent list searches! */
729 for(gp
= a_lex_ghosts
; gp
!= NULL
; gp
= gp
->lg_next
)
730 if(!strcmp(word
, gp
->lg_name
)){
735 line
.s
= salloc(i
+ line
.l
+1);
736 memcpy(line
.s
, gp
->lg_cmd
.s
, i
);
737 memcpy(line
.s
+ i
, cp
, line
.l
);
738 line
.s
[i
+= line
.l
] = '\0';
741 line
.s
= gp
->lg_cmd
.s
;
742 line
.l
= gp
->lg_cmd
.l
;
748 if((cmd
= a_lex__firstfit(word
)) == NULL
|| cmd
->lc_func
== &c_cmdnotsupp
){
751 if(!(s
= condstack_isskip()) || (options
& OPT_D_V
))
752 n_err(_("Unknown command%s: `%s'\n"),
753 (s
? _(" (ignored due to `if' condition)") : n_empty
), word
);
763 /* See if we should execute the command -- if a conditional we always
764 * execute it, otherwise, check the state of cond */
766 if(!(cmd
->lc_argtype
& ARG_F
) && condstack_isskip())
769 /* Process the arguments to the command, depending on the type it expects */
770 if((cmd
->lc_argtype
& ARG_I
) &&
771 !(options
& (OPT_INTERACTIVE
| OPT_BATCH_FLAG
))){
772 n_err(_("May not execute `%s' unless interactive or in batch mode\n"),
776 if(!(cmd
->lc_argtype
& ARG_M
) && (options
& OPT_SENDMODE
)){
777 n_err(_("May not execute `%s' while sending\n"), cmd
->lc_name
);
780 if(cmd
->lc_argtype
& ARG_R
){
781 if(pstate
& PS_COMPOSE_MODE
){
782 /* TODO PS_COMPOSE_MODE: should allow `reply': ~:reply! */
783 n_err(_("Cannot invoke `%s' when in compose mode\n"), cmd
->lc_name
);
786 /* TODO Nothing should prevent ARG_R in conjunction with
787 * TODO PS_ROBOT|_SOURCING; see a.._may_yield_control()! */
788 if(pstate
& (PS_ROBOT
| PS_SOURCING
)){
789 n_err(_("Cannot invoke `%s' from a macro or during file inclusion\n"),
794 if((cmd
->lc_argtype
& ARG_S
) && !(pstate
& PS_STARTED
)){
795 n_err(_("May not execute `%s' during startup\n"), cmd
->lc_name
);
798 if(!(cmd
->lc_argtype
& ARG_X
) && (pstate
& PS_COMPOSE_FORKHOOK
)){
799 n_err(_("Cannot invoke `%s' from a hook running in a child process\n"),
804 if((cmd
->lc_argtype
& ARG_A
) && mb
.mb_type
== MB_VOID
){
805 n_err(_("Cannot execute `%s' without active mailbox\n"), cmd
->lc_name
);
808 if((cmd
->lc_argtype
& ARG_W
) && !(mb
.mb_perm
& MB_DELE
)){
809 n_err(_("May not execute `%s' -- message file is read only\n"),
814 if(cmd
->lc_argtype
& ARG_O
)
815 OBSOLETE2(_("this command will be removed"), cmd
->lc_name
);
816 if(cmd
->lc_argtype
& ARG_V
)
817 temporary_arg_v_store
= NULL
;
819 if(wysh
&& (cmd
->lc_argtype
& ARG_ARGMASK
) != ARG_WYRALIST
)
820 n_err(_("`wysh' prefix doesn't affect `%s'\n"), cmd
->lc_name
);
821 /* TODO v15: strip PS_ARGLIST_MASK off, just in case the actual command
822 * TODO doesn't use any of those list commands which strip this mask,
823 * TODO and for now we misuse bits for checking relation to history;
824 * TODO argument state should be property of a per-command carrier instead */
825 pstate
&= ~PS_ARGLIST_MASK
;
826 switch(cmd
->lc_argtype
& ARG_ARGMASK
){
828 /* Message list defaulting to nearest forward legal message */
831 if((c
= getmsglist(cp
, n_msgvec
, cmd
->lc_msgflag
)) < 0)
834 if((n_msgvec
[0] = first(cmd
->lc_msgflag
, cmd
->lc_msgmask
)) != 0)
837 if(n_msgvec
[0] == 0){
838 if(!(pstate
& PS_HOOK_MASK
))
839 printf(_("No applicable messages\n"));
842 e
= (*cmd
->lc_func
)(n_msgvec
);
846 /* Message list with no defaults, but no error if none exist */
847 if(n_msgvec
== NULL
){
849 n_err(_("Invalid use of message list\n"));
852 if((c
= getmsglist(cp
, n_msgvec
, cmd
->lc_msgflag
)) < 0)
854 e
= (*cmd
->lc_func
)(n_msgvec
);
858 /* Just the straight string, with leading blanks removed */
859 while(whitechar(*cp
))
861 e
= (*cmd
->lc_func
)(cp
);
876 if((c
= getrawlist((c
!= 0), arglist
, n_NELEM(arglist
), cp
, line
.l
)) < 0){
877 n_err(_("Invalid argument list\n"));
880 if(c
< cmd
->lc_minargs
){
881 n_err(_("`%s' requires at least %d arg(s)\n"),
882 cmd
->lc_name
, cmd
->lc_minargs
);
886 if(c
> cmd
->lc_maxargs
){
887 n_err(_("`%s' takes no more than %d arg(s)\n"),
888 cmd
->lc_name
, cmd
->lc_maxargs
);
892 e
= (*cmd
->lc_func
)(arglist
);
896 /* Just the constant zero, for exiting, eg. */
897 e
= (*cmd
->lc_func
)(0);
901 DBG( n_panic(_("Implementation error: unknown argument type: %d"),
902 cmd
->lc_argtype
& ARG_ARGMASK
); )
906 if(e
== 0 && (cmd
->lc_argtype
& ARG_V
) &&
907 (cp
= temporary_arg_v_store
) != NULL
){
908 temporary_arg_v_store
= NULL
;
909 evp
->le_new_content
= cp
;
912 if(!(cmd
->lc_argtype
& ARG_H
))
913 evp
->le_add_history
= (((cmd
->lc_argtype
& ARG_G
) ||
914 (pstate
& PS_MSGLIST_GABBY
)) ? TRUM1
: TRU1
);
918 bool_t reset
= !(pstate
& PS_ROOT
);
921 ok_vset(_exit_status
, (e
== 0 ? "0" : "1")); /* TODO num=1 +real value! */
926 /* Exit the current source file on error TODO what a mess! */
928 pstate
&= ~PS_EVAL_ERROR
;
930 pstate
|= PS_EVAL_ERROR
;
931 if(e
< 0 || (pstate
& PS_ROBOT
)){ /* FIXME */
940 if((cmd
->lc_argtype
& ARG_P
) && ok_blook(autoprint
))
942 line
.s
= savestr("type");
943 line
.l
= sizeof("type") -1;
944 gp
= (struct a_lex_ghost
*)-1; /* Avoid `ghost' interpretation */
948 if(!(pstate
& (PS_SOURCING
| PS_HOOK_MASK
)) && !(cmd
->lc_argtype
& ARG_T
))
949 pstate
|= PS_SAW_COMMAND
;
951 pstate
&= ~PS_EVAL_ERROR
;
956 fprintf(stderr, "a_lex_evaluate returns %d for <%s>\n",e,line.s);
962 static struct a_lex_cmd
const *
963 a_lex__firstfit(char const *comm
){ /* TODO *hashtable*! linear list search!!! */
964 struct a_lex_cmd
const *cp
;
967 for(cp
= a_lex_cmd_tab
;
968 PTRCMP(cp
, <, &a_lex_cmd_tab
[n_NELEM(a_lex_cmd_tab
)]); ++cp
)
969 if(*comm
== *cp
->lc_name
&& is_prefix(comm
, cp
->lc_name
))
979 NYD_X
; /* Signal handler */
986 a_lex_onintr(int s
){ /* TODO block signals while acting */
987 NYD_X
; /* Signal handler */
990 safe_signal(SIGINT
, a_lex_onintr
);
992 termios_state_reset();
993 close_all_files(); /* FIXME .. of current level ONLU! */
999 a_lex_unstack(TRUM1
);
1002 n_err_sighdl(_("Interrupt\n"));
1003 safe_signal(SIGPIPE
, a_lex_oldpipe
);
1004 siglongjmp(a_lex_srbuf
, 0); /* FIXME get rid */
1008 a_lex_unstack(bool_t eval_error
){
1009 struct a_lex_input_stack
*lip
;
1012 if((lip
= a_lex_input
) == NULL
){
1015 /* If called from a_lex_onintr(), be silent FIXME */
1016 pstate
&= ~(PS_SOURCING
| PS_ROBOT
);
1017 if(eval_error
== TRUM1
|| !(pstate
& PS_STARTED
))
1022 if(lip
->li_flags
& a_LEX_SLICE
){ /* TODO Temporary hack */
1023 stdin
= lip
->li_slice_stdin
;
1024 stdout
= lip
->li_slice_stdout
;
1025 options
= lip
->li_slice_options
;
1026 goto jthe_slice_hack
;
1029 if(lip
->li_flags
& a_LEX_MACRO
){
1030 if(lip
->li_flags
& a_LEX_MACRO_FREE_DATA
){
1033 while(*(lp
= &lip
->li_lines
[lip
->li_loff
]) != NULL
){
1037 /* Part of lip's memory chunk, then */
1038 if(!(lip
->li_flags
& a_LEX_MACRO_CMD
))
1039 free(lip
->li_lines
);
1042 if(lip
->li_flags
& a_LEX_PIPE
)
1043 /* XXX command manager should -TERM then -KILL instead of hoping
1044 * XXX for exit of provider due to EPIPE / SIGPIPE */
1045 Pclose(lip
->li_file
, TRU1
);
1047 Fclose(lip
->li_file
);
1050 if(!condstack_take(lip
->li_cond
)){
1051 n_err(_("Unmatched `if' at end of %s %s\n"),
1052 ((lip
->li_flags
& a_LEX_MACRO
1053 ? (lip
->li_flags
& a_LEX_MACRO_CMD
? _("command") : _("macro"))
1054 : _("`source'd file"))),
1059 n_memory_autorec_pop(&lip
->li_autorecmem
[0]);
1062 if(lip
->li_on_finalize
!= NULL
)
1063 (*lip
->li_on_finalize
)(lip
->li_finalize_arg
);
1065 if((a_lex_input
= lip
->li_outer
) == NULL
){
1066 pstate
&= ~(PS_SOURCING
| PS_ROBOT
);
1068 if((a_lex_input
->li_flags
& (a_LEX_MACRO
| a_LEX_SUPER_MACRO
)) ==
1069 (a_LEX_MACRO
| a_LEX_SUPER_MACRO
))
1070 pstate
&= ~PS_SOURCING
;
1071 assert(pstate
& PS_ROBOT
);
1077 if(lip
!= NULL
&& (lip
->li_flags
& a_LEX_FREE
))
1079 if(n_UNLIKELY(a_lex_input
!= NULL
&& eval_error
== TRUM1
))
1080 a_lex_unstack(TRUM1
);
1086 if(options
& OPT_D_V
)
1087 n_alert(_("Stopped %s %s due to errors%s"),
1088 (pstate
& PS_STARTED
1089 ? (lip
->li_flags
& a_LEX_SLICE
? _("sliced in program")
1090 : (lip
->li_flags
& a_LEX_MACRO
1091 ? (lip
->li_flags
& a_LEX_MACRO_CMD
1092 ? _("evaluating command") : _("evaluating macro"))
1093 : (lip
->li_flags
& a_LEX_PIPE
1094 ? _("executing `source'd pipe")
1095 : _("loading `source'd file")))
1097 : (lip
->li_flags
& a_LEX_MACRO
1098 ? (lip
->li_flags
& a_LEX_MACRO_X_OPTION
1099 ? _("evaluating command line") : _("evaluating macro"))
1100 : _("loading initialization resource"))),
1102 (options
& OPT_DEBUG
? n_empty
: _(" (enable *debug* for trace)")));
1105 if(!(options
& OPT_INTERACTIVE
) && !(pstate
& PS_STARTED
)){
1106 if(options
& OPT_D_V
)
1107 n_alert(_("Non-interactive, bailing out due to errors "
1108 "in startup load phase"));
1115 a_lex_source_file(char const *file
, bool_t silent_error
){
1116 struct a_lex_input_stack
*lip
;
1125 /* Being a command argument file is space-trimmed *//* TODO v15 with
1126 * TODO WYRALIST this is no longer necessary true, and for that we
1127 * TODO don't set _PARSE_TRIMSPACE because we cannot! -> cmd_tab.h!! */
1129 ((ispipe
= (!silent_error
&& (nlen
= strlen(file
)) > 0 &&
1130 file
[--nlen
] == '|')))
1134 for(nlen
= strlen(file
); nlen
> 0;){
1140 nbuf
= savestrbuf(file
, nlen
);
1149 if((fip
= Popen(nbuf
/* #if 0 above = savestrbuf(file, nlen)*/, "r",
1150 ok_vlook(SHELL
), NULL
, COMMAND_FD_NULL
)) == NULL
){
1151 if(!silent_error
|| (options
& OPT_D_V
))
1155 }else if((nbuf
= fexpand(file
, FEXP_LOCAL
)) == NULL
)
1157 else if((fip
= Fopen(nbuf
, "r")) == NULL
){
1158 if(!silent_error
|| (options
& OPT_D_V
))
1163 lip
= smalloc(n_VSTRUCT_SIZEOF(struct a_lex_input_stack
, li_name
) +
1164 (nlen
= strlen(nbuf
) +1));
1165 memset(lip
, 0, n_VSTRUCT_SIZEOF(struct a_lex_input_stack
, li_name
));
1166 lip
->li_outer
= a_lex_input
;
1168 lip
->li_cond
= condstack_release();
1169 n_memory_autorec_push(&lip
->li_autorecmem
[0]);
1170 lip
->li_flags
= (ispipe
? a_LEX_FREE
| a_LEX_PIPE
: a_LEX_FREE
) |
1171 (a_lex_input
!= NULL
&& (a_lex_input
->li_flags
& a_LEX_SUPER_MACRO
)
1172 ? a_LEX_SUPER_MACRO
: 0);
1173 memcpy(lip
->li_name
, nbuf
, nlen
);
1175 pstate
|= PS_SOURCING
| PS_ROBOT
;
1177 a_commands_recursive(n_LEXINPUT_NONE
| n_LEXINPUT_NL_ESC
);
1178 /* FIXME return TRUM1 if file can't be opened, FAL0 on eval error */
1181 return silent_error
? TRU1
: (fip
!= NULL
);
1185 a_lex_load(struct a_lex_input_stack
*lip
){
1189 assert(!(pstate
& PS_STARTED
));
1190 assert(a_lex_input
== NULL
);
1193 * Any errors in the start-up file shall either cause mailx to terminate
1194 * with a diagnostic message and a non-zero status or to continue after
1195 * writing a diagnostic message, ignoring the remainder of the lines in
1196 * the start-up file. */
1197 lip
->li_cond
= condstack_release();
1198 n_memory_autorec_push(&lip
->li_autorecmem
[0]);
1200 /* FIXME won't work for now (PS_ROBOT needs PS_SOURCING anyway)
1201 pstate |= PS_ROBOT |
1202 (lip->li_flags & a_LEX_MACRO_X_OPTION ? 0 : PS_SOURCING);
1204 pstate
|= PS_ROBOT
| PS_SOURCING
;
1205 if(options
& OPT_D_V
)
1206 n_err(_("Loading %s\n"), n_shexp_quote_cp(lip
->li_name
, FAL0
));
1208 if(!(rv
= n_commands())){
1209 if(!(options
& OPT_INTERACTIVE
)){
1210 if(options
& OPT_D_V
)
1211 n_alert(_("Non-interactive program mode, forced exit"));
1215 /* PS_EXIT handled by callers */
1221 a_lex__cmdrecint(int sig
){ /* TODO one day, we don't need it no more */
1222 NYD_X
; /* Signal handler */
1224 siglongjmp(a_lex_input
->li_cmdrec_jmp
, 1);
1228 a_commands_recursive(enum n_lexinput_flags lif
){
1229 volatile int hadint
; /* TODO get rid of shitty signal stuff (see signal.c) */
1230 sighandler_type soldhdl
;
1231 sigset_t sintset
, soldset
;
1232 struct a_lex_eval_ctx ev
;
1236 memset(&ev
, 0, sizeof ev
);
1238 sigfillset(&sintset
);
1239 sigprocmask(SIG_BLOCK
, &sintset
, &soldset
);
1241 if((soldhdl
= safe_signal(SIGINT
, SIG_IGN
)) != SIG_IGN
){
1242 safe_signal(SIGINT
, &a_lex__cmdrecint
);
1243 if(sigsetjmp(a_lex_input
->li_cmdrec_jmp
, 1)){
1248 sigprocmask(SIG_SETMASK
, &soldset
, NULL
);
1250 n_COLOUR( n_colour_env_push(); )
1255 /* Read a line of commands and handle end of file specially */
1256 ev
.le_line
.l
= ev
.le_line_size
;
1257 n
= n_lex_input(lif
, NULL
, &ev
.le_line
.s
, &ev
.le_line
.l
,
1259 ev
.le_line_size
= (ui32_t
)ev
.le_line
.l
;
1260 ev
.le_line
.l
= (ui32_t
)n
;
1265 if(a_lex_evaluate(&ev
)){
1271 if((options
& OPT_BATCH_FLAG
) && ok_blook(batch_exit_on_error
)){
1272 if(exit_status
!= EXIT_OK
)
1278 n_COLOUR( n_colour_env_pop(FAL0
); )
1280 if(ev
.le_line
.s
!= NULL
)
1283 if(soldhdl
!= SIG_IGN
)
1284 safe_signal(SIGINT
, soldhdl
);
1287 sigprocmask(SIG_SETMASK
, &soldset
, NULL
);
1294 c_cmdnotsupp(void *vp
){
1297 n_err(_("The requested feature is not compiled in\n"));
1303 n_commands(void){ /* FIXME */
1304 struct a_lex_eval_ctx ev
;
1311 if (!(pstate
& PS_SOURCING
)) {
1312 if (safe_signal(SIGINT
, SIG_IGN
) != SIG_IGN
)
1313 safe_signal(SIGINT
, &a_lex_onintr
);
1314 if (safe_signal(SIGHUP
, SIG_IGN
) != SIG_IGN
)
1315 safe_signal(SIGHUP
, &a_lex_hangup
);
1317 a_lex_oldpipe
= safe_signal(SIGPIPE
, SIG_IGN
);
1318 safe_signal(SIGPIPE
, a_lex_oldpipe
);
1320 memset(&ev
, 0, sizeof ev
);
1322 (void)sigsetjmp(a_lex_srbuf
, 1); /* FIXME get rid */
1324 char *temporary_orig_line
; /* XXX eval_ctx.le_line not yet constant */
1326 n_COLOUR( n_colour_env_pop(TRU1
); )
1328 /* TODO Unless we have our signal manager (or however we do it) child
1329 * TODO processes may have time slots where their execution isn't
1330 * TODO protected by signal handlers (in between start and setup
1331 * TODO completed). close_all_files() is only called from onintr()
1332 * TODO so those may linger possibly forever */
1333 if(!(pstate
& PS_SOURCING
))
1340 if (!(pstate
& PS_SOURCING
)) {
1343 /* TODO Note: this buffer may contain a password. We should redefine
1344 * TODO the code flow which has to do that */
1345 if ((cp
= termios_state
.ts_linebuf
) != NULL
) {
1346 termios_state
.ts_linebuf
= NULL
;
1347 termios_state
.ts_linesize
= 0;
1348 free(cp
); /* TODO pool give-back */
1350 /* TODO Due to expand-on-tab of NCL the buffer may grow */
1351 if (ev
.le_line
.l
> LINESIZE
* 3) {
1352 free(ev
.le_line
.s
); /* TODO pool! but what? */
1353 ev
.le_line
.s
= NULL
;
1354 ev
.le_line
.l
= ev
.le_line_size
= 0;
1358 if (!(pstate
& PS_SOURCING
) && (options
& OPT_INTERACTIVE
)) {
1361 cp
= ok_vlook(newmail
);
1362 if ((options
& OPT_TTYIN
) && cp
!= NULL
) {
1365 /* FIXME TEST WITH NOPOLL ETC. !!! */
1366 n
= (cp
!= NULL
&& strcmp(cp
, "nopoll"));
1367 if ((mb
.mb_type
== MB_FILE
&& !stat(mailname
, &st
) &&
1368 st
.st_size
> mailsize
) ||
1369 (mb
.mb_type
== MB_MAILDIR
&& n
!= 0)) {
1370 size_t odot
= PTR2SIZE(dot
- message
);
1371 ui32_t odid
= (pstate
& PS_DID_PRINT_DOT
);
1373 if (setfile(mailname
,
1375 ((mb
.mb_perm
& MB_DELE
) ? 0 : FEDIT_RDONLY
)) < 0) {
1376 exit_status
|= EXIT_ERR
;
1380 dot
= message
+ odot
;
1385 exit_status
= EXIT_OK
;
1388 /* Read a line of commands and handle end of file specially */
1390 ev
.le_line
.l
= ev
.le_line_size
;
1391 n
= n_lex_input(n_LEXINPUT_CTX_DEFAULT
| n_LEXINPUT_NL_ESC
, NULL
,
1392 &ev
.le_line
.s
, &ev
.le_line
.l
, ev
.le_new_content
);
1393 ev
.le_line_size
= (ui32_t
)ev
.le_line
.l
;
1394 ev
.le_line
.l
= (ui32_t
)n
;
1397 /* FIXME did unstack() when PS_SOURCING, only break with PS_LOADING*/
1398 if (!(pstate
& PS_ROBOT
) &&
1399 (options
& OPT_INTERACTIVE
) && ok_blook(ignoreeof
)) {
1400 printf(_("*ignoreeof* set, use `quit' to quit.\n"));
1401 n_msleep(500, FAL0
);
1407 temporary_orig_line
= ((pstate
& PS_SOURCING
) ||
1408 !(options
& OPT_INTERACTIVE
)) ? NULL
1409 : savestrbuf(ev
.le_line
.s
, ev
.le_line
.l
);
1410 pstate
&= ~PS_HOOK_MASK
;
1411 if (a_lex_evaluate(&ev
)) {
1412 if (!(pstate
& PS_STARTED
)) /* TODO mess; join PS_EVAL_ERROR.. */
1417 if ((options
& OPT_BATCH_FLAG
) && ok_blook(batch_exit_on_error
)) {
1418 if (exit_status
!= EXIT_OK
)
1420 if ((pstate
& (PS_SOURCING
| PS_EVAL_ERROR
)) == PS_EVAL_ERROR
) {
1421 exit_status
= EXIT_ERR
;
1425 if (!(pstate
& PS_SOURCING
) && (options
& OPT_INTERACTIVE
)) {
1426 if (ev
.le_new_content
!= NULL
)
1428 /* *Can* happen since _evaluate() n_unstack()s on error! XXX no more */
1429 if (temporary_orig_line
!= NULL
)
1430 n_tty_addhist(temporary_orig_line
, (ev
.le_add_history
!= TRU1
));
1433 if(pstate
& PS_EXIT
)
1439 if (ev
.le_line
.s
!= NULL
)
1446 (n_lex_input
)(enum n_lexinput_flags lif
, char const *prompt
, char **linebuf
,
1447 size_t *linesize
, char const *string n_MEMORY_DEBUG_ARGS
){
1448 /* TODO readline: linebuf pool!; n_lex_input should return si64_t */
1449 struct n_string xprompt
;
1451 bool_t doprompt
, dotty
;
1456 /* Special case macro mode: never need to prompt, lines have always been
1457 * unfolded already */
1458 if(!(lif
& n_LEXINPUT_FORCE_STDIN
) &&
1459 a_lex_input
!= NULL
&& (a_lex_input
->li_flags
& a_LEX_MACRO
)){
1460 if(*linebuf
!= NULL
)
1463 if((*linebuf
= a_lex_input
->li_lines
[a_lex_input
->li_loff
]) == NULL
){
1469 ++a_lex_input
->li_loff
;
1470 *linesize
= strlen(*linebuf
);
1471 if(!(a_lex_input
->li_flags
& a_LEX_MACRO_FREE_DATA
))
1472 *linebuf
= sbufdup(*linebuf
, *linesize
);
1474 iftype
= (a_lex_input
->li_flags
& a_LEX_MACRO_X_OPTION
)
1476 : (a_lex_input
->li_flags
& a_LEX_MACRO_CMD
) ? "CMD" : "MACRO";
1478 pstate
|= PS_READLINE_NL
;
1481 pstate
&= ~PS_READLINE_NL
;
1483 iftype
= (!(pstate
& PS_STARTED
) ? "LOAD"
1484 : (pstate
& PS_SOURCING
) ? "SOURCE" : "READ");
1485 doprompt
= ((pstate
& (PS_STARTED
| PS_ROBOT
)) == PS_STARTED
&&
1486 (options
& OPT_INTERACTIVE
));
1487 dotty
= (doprompt
&& !ok_blook(line_editor_disable
));
1489 lif
|= n_LEXINPUT_PROMPT_NONE
;
1492 n_string_creat_auto(&xprompt
);
1494 lif
|= n_LEXINPUT_PROMPT_EVAL
;
1497 /* Ensure stdout is flushed first anyway */
1498 if(!dotty
&& (lif
& n_LEXINPUT_PROMPT_NONE
))
1501 ifile
= (a_lex_input
!= NULL
) ? a_lex_input
->li_file
: stdin
;
1503 assert((pstate
& PS_COMPOSE_FORKHOOK
) &&
1504 a_lex_input
!= NULL
&& (a_lex_input
->li_flags
& a_LEX_MACRO
));
1508 for(nold
= n
= 0;;){
1510 assert(ifile
== stdin
);
1511 if(string
!= NULL
&& (n
= (int)strlen(string
)) > 0){
1515 *linesize
= (size_t)n
+ LINESIZE
+1;
1516 *linebuf
= (n_realloc
)(*linebuf
, *linesize n_MEMORY_DEBUG_ARGSCALL
);
1517 memcpy(*linebuf
, string
, (size_t)n
+1);
1520 /* TODO if nold>0, don't redisplay the entire line!
1521 * TODO needs complete redesign ... */
1522 n
= (n_tty_readline
)(lif
, prompt
, linebuf
, linesize
, n
1523 n_MEMORY_DEBUG_ARGSCALL
);
1525 if(!(lif
& n_LEXINPUT_PROMPT_NONE
)){
1526 n_tty_create_prompt(&xprompt
, prompt
, lif
);
1527 if(xprompt
.s_len
> 0){
1528 fwrite(xprompt
.s_dat
, 1, xprompt
.s_len
, stdout
);
1533 n
= (readline_restart
)(ifile
, linebuf
, linesize
, n
1534 n_MEMORY_DEBUG_ARGSCALL
);
1536 if(n
> 0 && nold
> 0){
1538 char const *cp
= *linebuf
+ nold
;
1540 while(blankspacechar(*cp
) && nold
+ i
< n
)
1543 memmove(*linebuf
+ nold
, cp
, n
- nold
- i
);
1545 (*linebuf
)[n
] = '\0';
1554 * An unquoted <backslash> at the end of a command line shall
1555 * be discarded and the next line shall continue the command */
1556 if(!(lif
& n_LEXINPUT_NL_ESC
) || (*linebuf
)[n
- 1] != '\\'){
1558 pstate
|= PS_READLINE_NL
;
1561 /* Definitely outside of quotes, thus the quoting rules are so that an
1562 * uneven number of successive backslashs at EOL is a continuation */
1566 for(j
= 1, i
= (size_t)n
- 1; i
-- > 0; ++j
)
1567 if((*linebuf
)[i
] != '\\')
1572 (*linebuf
)[nold
= --n
] = '\0';
1573 lif
|= n_LEXINPUT_NL_FOLLOW
;
1578 (*linebuf
)[*linesize
= n
] = '\0';
1582 if(lif
& n_LEXINPUT_DROP_TRAIL_SPC
){
1586 for(cp
= &(*linebuf
)[i
= (size_t)n
];; --i
){
1588 if(!blankspacechar(c
))
1591 (*linebuf
)[n
= (int)i
] = '\0';
1594 if(lif
& n_LEXINPUT_DROP_LEAD_SPC
){
1598 for(cp
= &(*linebuf
)[0], j
= (size_t)n
, i
= 0; i
< j
; ++i
){
1600 if(!blankspacechar(c
))
1604 memcpy(&(*linebuf
)[0], &(*linebuf
)[i
], j
-= i
);
1605 (*linebuf
)[n
= (int)j
] = '\0';
1608 #endif /* 0 (notyet - must take care for backslash escaped space) */
1610 if(options
& OPT_D_VV
)
1611 n_err(_("%s %d bytes <%s>\n"), iftype
, n
, *linebuf
);
1613 if (pstate
& PS_PSTATE_PENDMASK
)
1614 a_lex_update_pstate();
1616 /* TODO We need to special case a_LEX_SLICE, since that is not managed by us
1617 * TODO but only established from the outside and we need to drop this
1618 * TODO overlay context somehow */
1619 if(n
< 0 && a_lex_input
!= NULL
&& (a_lex_input
->li_flags
& a_LEX_SLICE
))
1620 a_lex_unstack(FAL0
);
1626 n_lex_input_cp(enum n_lexinput_flags lif
, char const *prompt
,
1627 char const *string
){
1628 /* FIXME n_lex_input_cp_addhist(): leaks on sigjmp without linepool */
1638 n
= n_lex_input(lif
, prompt
, &linebuf
, &linesize
, string
);
1639 if(n
> 0 && *(rv
= savestrbuf(linebuf
, (size_t)n
)) != '\0' &&
1640 (lif
& n_LEXINPUT_HIST_ADD
) && (options
& OPT_INTERACTIVE
))
1641 n_tty_addhist(rv
, ((lif
& n_LEXINPUT_HIST_GABBY
) != 0));
1650 c_read(void *v
){ /* TODO IFS? how? -r */
1651 char const **argv
, *cp
, *cp2
;
1656 for(argv
= v
; (cp
= *argv
++) != NULL
;)
1657 if(!n_shexp_is_valid_varname(cp
)){
1658 n_err(_("`read': not a valid variable name: %s\n"),
1659 n_shexp_quote_cp(cp
, FAL0
));
1665 cp
= n_lex_input_cp(((pstate
& PS_COMPOSE_MODE
1666 ? n_LEXINPUT_CTX_COMPOSE
: n_LEXINPUT_CTX_DEFAULT
) |
1667 n_LEXINPUT_FORCE_STDIN
| n_LEXINPUT_NL_ESC
|
1668 n_LEXINPUT_PROMPT_NONE
/* XXX POSIX: PS2: yes! */),
1673 for(argv
= v
; *argv
!= NULL
; ++argv
){
1676 while(blankchar(*cp
))
1681 /* The last variable gets the remaining line less trailing IFS */
1682 if(argv
[1] == NULL
){
1683 for(cp2
= cp
; *cp2
!= '\0'; ++cp2
)
1685 for(; cp2
> cp
; --cp2
){
1691 for(cp2
= cp
; (c
= *++cp2
) != '\0';)
1695 vok_vset(*argv
, savestrbuf(cp
, PTR2SIZE(cp2
- cp
)));
1699 /* Set the remains to the empty string */
1700 for(; *argv
!= NULL
; ++argv
)
1701 vok_vset(*argv
, "");
1710 n_load(char const *name
){
1711 struct a_lex_input_stack
*lip
;
1716 if(name
== NULL
|| *name
== '\0' || (fip
= Fopen(name
, "r")) == NULL
)
1719 i
= strlen(name
) +1;
1720 lip
= smalloc(n_VSTRUCT_SIZEOF(struct a_lex_input_stack
, li_name
) + i
);
1721 memset(lip
, 0, n_VSTRUCT_SIZEOF(struct a_lex_input_stack
, li_name
));
1723 lip
->li_flags
= a_LEX_FREE
;
1724 memcpy(lip
->li_name
, name
, i
);
1733 n_load_Xargs(char const **lines
, size_t cnt
){
1734 static char const name
[] = "-X";
1736 ui8_t buf
[sizeof(struct a_lex_input_stack
) + sizeof name
];
1737 char const *srcp
, *xsrcp
;
1739 size_t imax
, i
, len
;
1740 struct a_lex_input_stack
*lip
;
1744 memset(lip
, 0, n_VSTRUCT_SIZEOF(struct a_lex_input_stack
, li_name
));
1745 lip
->li_flags
= a_LEX_MACRO
| a_LEX_MACRO_FREE_DATA
|
1746 a_LEX_MACRO_X_OPTION
| a_LEX_SUPER_MACRO
;
1747 memcpy(lip
->li_name
, name
, sizeof name
);
1749 /* The problem being that we want to support reverse solidus newline
1750 * escaping also within multiline -X, i.e., POSIX says:
1751 * An unquoted <backslash> at the end of a command line shall
1752 * be discarded and the next line shall continue the command
1753 * Therefore instead of "lip->li_lines = n_UNCONST(lines)", duplicate the
1754 * entire lines array and set _MACRO_FREE_DATA */
1756 lip
->li_lines
= smalloc(sizeof(*lip
->li_lines
) * imax
);
1758 /* For each of the input lines.. */
1759 for(i
= len
= 0, cp
= NULL
; cnt
> 0;){
1763 if((j
= strlen(srcp
= *lines
)) == 0){
1768 /* Separate one line from a possible multiline input string */
1769 if((xsrcp
= memchr(srcp
, '\n', j
)) != NULL
){
1771 j
= PTR2SIZE(xsrcp
- srcp
);
1775 /* The (separated) string may itself indicate soft newline escaping */
1776 if((keep
= (srcp
[j
- 1] == '\\'))){
1779 /* Need an uneven number of reverse solidus */
1780 for(xk
= 1, xj
= j
- 1; xj
-- > 0; ++xk
)
1781 if(srcp
[xj
] != '\\')
1789 /* Strip any leading WS from follow lines, then */
1791 while(j
> 0 && blankspacechar(*srcp
))
1795 if(i
+ 2 >= imax
){ /* TODO need a vector (main.c, here, ++) */
1797 lip
->li_lines
= n_realloc(lip
->li_lines
, sizeof(*lip
->li_lines
) *
1800 lip
->li_lines
[i
] = cp
= n_realloc(cp
, len
+ j
+1);
1801 memcpy(&cp
[len
], srcp
, j
);
1802 cp
[len
+= j
] = '\0';
1811 assert(i
+ 1 < imax
);
1812 lip
->li_lines
[i
++] = cp
;
1814 lip
->li_lines
[i
] = NULL
;
1817 if(pstate
& PS_EXIT
)
1827 rv
= (a_lex_source_file(*(char**)v
, FAL0
) == TRU1
) ? 0 : 1;
1833 c_source_if(void *v
){ /* XXX obsolete?, support file tests in `if' etc.! */
1837 rv
= (a_lex_source_file(*(char**)v
, TRU1
) != FAL0
) ? 0 : 1;
1843 n_source_macro(enum n_lexinput_flags lif
, char const *name
, char **lines
,
1844 void (*on_finalize
)(void*), void *finalize_arg
){
1845 struct a_lex_input_stack
*lip
;
1850 lip
= smalloc(n_VSTRUCT_SIZEOF(struct a_lex_input_stack
, li_name
) +
1851 (i
= strlen(name
) +1));
1852 memset(lip
, 0, n_VSTRUCT_SIZEOF(struct a_lex_input_stack
, li_name
));
1853 lip
->li_outer
= a_lex_input
;
1854 lip
->li_file
= NULL
;
1855 lip
->li_cond
= condstack_release();
1856 n_memory_autorec_push(&lip
->li_autorecmem
[0]);
1857 lip
->li_flags
= a_LEX_FREE
| a_LEX_MACRO
| a_LEX_MACRO_FREE_DATA
|
1858 (a_lex_input
== NULL
|| (a_lex_input
->li_flags
& a_LEX_SUPER_MACRO
)
1859 ? a_LEX_SUPER_MACRO
: 0);
1860 lip
->li_lines
= lines
;
1861 lip
->li_on_finalize
= on_finalize
;
1862 lip
->li_finalize_arg
= finalize_arg
;
1863 memcpy(lip
->li_name
, name
, i
);
1867 rv
= a_commands_recursive(lif
);
1873 n_source_command(enum n_lexinput_flags lif
, char const *cmd
){
1874 struct a_lex_input_stack
*lip
;
1882 lip
= smalloc(n_VSTRUCT_SIZEOF(struct a_lex_input_stack
, li_name
) +
1883 ial
+ 2*sizeof(char*));
1884 memset(lip
, 0, n_VSTRUCT_SIZEOF(struct a_lex_input_stack
, li_name
));
1885 lip
->li_outer
= a_lex_input
;
1886 lip
->li_cond
= condstack_release();
1887 n_memory_autorec_push(&lip
->li_autorecmem
[0]);
1888 lip
->li_flags
= a_LEX_FREE
| a_LEX_MACRO
| a_LEX_MACRO_CMD
|
1889 (a_lex_input
== NULL
|| (a_lex_input
->li_flags
& a_LEX_SUPER_MACRO
)
1890 ? a_LEX_SUPER_MACRO
: 0);
1891 lip
->li_lines
= (void*)&lip
->li_name
[ial
];
1892 memcpy(lip
->li_lines
[0] = &lip
->li_name
[0], cmd
, i
);
1893 lip
->li_lines
[1] = NULL
;
1897 rv
= a_commands_recursive(lif
);
1903 n_source_slice_hack(char const *cmd
, FILE *new_stdin
, FILE *new_stdout
,
1904 ui32_t new_options
, void (*on_finalize
)(void*), void *finalize_arg
){
1905 struct a_lex_input_stack
*lip
;
1909 lip
= smalloc(n_VSTRUCT_SIZEOF(struct a_lex_input_stack
, li_name
) +
1910 (i
= strlen(cmd
) +1));
1911 memset(lip
, 0, n_VSTRUCT_SIZEOF(struct a_lex_input_stack
, li_name
));
1912 lip
->li_outer
= a_lex_input
;
1913 lip
->li_file
= new_stdin
;
1914 lip
->li_flags
= a_LEX_FREE
| a_LEX_SLICE
;
1915 lip
->li_on_finalize
= on_finalize
;
1916 lip
->li_finalize_arg
= finalize_arg
;
1917 lip
->li_slice_stdin
= stdin
;
1918 lip
->li_slice_stdout
= stdout
;
1919 lip
->li_slice_options
= options
;
1920 memcpy(lip
->li_name
, cmd
, i
);
1923 stdout
= new_stdout
;
1924 options
= new_options
;
1931 n_source_slice_hack_remove_after_jump(void){
1932 a_lex_unstack(FAL0
);
1936 n_source_may_yield_control(void){
1937 return ((options
& OPT_INTERACTIVE
) &&
1938 (pstate
& PS_STARTED
) &&
1939 (!(pstate
& PS_ROBOT
) ||
1940 /* But: ok for ~:, yet: unless in a hook.
1941 * TODO This is obviously hacky in that it depends on _input_stack not
1942 * TODO loosing any flags when creating new contexts... Maybe this
1943 * TODO function should instead walk all up the context stack when
1944 * TODO there is one, and verify neither level prevents yielding! */
1945 ((pstate
& PS_COMPOSE_MODE
) && (a_lex_input
== NULL
||
1946 !(a_lex_input
->li_flags
& a_LEX_SLICE
)))) &&
1947 (a_lex_input
== NULL
|| a_lex_input
->li_outer
== NULL
));