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1 | /* | |
2 | $Header: /cvs/src/tdl/main.c,v 1.39.2.6 2004/02/03 22:17:22 richard Exp $ | |
3 | ||
4 | tdl - A console program for managing to-do lists | |
5 | Copyright (C) 2001,2002,2003,2004,2005 Richard P. Curnow | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program; if not, write to the Free Software | |
19 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA | |
20 | */ | |
21 | ||
22 | #include "tdl.h" | |
23 | #include "version.h" | |
24 | #include <assert.h> | |
25 | #include <string.h> | |
26 | #include <errno.h> | |
27 | #include <ctype.h> | |
28 | #include <fcntl.h> | |
29 | #include <sys/types.h> | |
30 | #include <sys/stat.h> | |
31 | #include <unistd.h> | |
32 | #include <signal.h> | |
33 | ||
34 | #ifdef USE_DOTLOCK | |
35 | #include <sys/utsname.h> | |
36 | #include <pwd.h> | |
37 | #endif | |
38 | ||
39 | /* The name of the database file (in whichever directory it may be) */ | |
40 | #define DBNAME ".tdldb" | |
41 | ||
42 | /* Set if db doesn't exist in this directory */ | |
43 | static char *current_database_path = NULL; | |
44 | ||
45 | /* The currently loaded database */ | |
46 | struct links top; | |
47 | ||
48 | /* Flag for whether data is actually loaded yet */ | |
49 | static int is_loaded = 0; | |
50 | ||
51 | #ifdef USE_DOTLOCK | |
52 | static char *lock_file_name = NULL; | |
53 | #endif | |
54 | ||
55 | /* Flag if currently loaded database has been changed and needs writing back to | |
56 | * the filesystem */ | |
57 | static int currently_dirty = 0; | |
58 | ||
59 | /* Flag indicating whether to load databases read only */ | |
60 | static int read_only = 0; | |
61 | ||
62 | /* Whether to complain about problems with file operations */ | |
63 | static int is_noisy = 1; | |
64 | ||
65 | /* Whether to forcibly unlock the database before the next lock attempt (e.g. | |
66 | * if the program crashed for some reason before.) */ | |
67 | static int forced_unlock = 0; | |
68 | ||
69 | static int is_interactive = 0; | |
70 | ||
71 | static void set_descendent_priority(struct node *x, enum Priority priority)/*{{{*/ | |
72 | { | |
73 | struct node *y; | |
74 | for (y = x->kids.next; y != (struct node *) &x->kids; y = y->chain.next) { | |
75 | y->priority = priority; | |
76 | set_descendent_priority(y, priority); | |
77 | } | |
78 | } | |
79 | /*}}}*/ | |
80 | ||
81 | /* This will be variable eventually */ | |
82 | static char default_database_path[] = "./" DBNAME; | |
83 | ||
84 | #ifdef USE_DOTLOCK | |
85 | static void unlock_database(void)/*{{{*/ | |
86 | { | |
87 | if (lock_file_name) unlink(lock_file_name); | |
88 | return; | |
89 | } | |
90 | /*}}}*/ | |
91 | static volatile void unlock_and_exit(int code)/*{{{*/ | |
92 | { | |
93 | unlock_database(); | |
94 | exit(code); | |
95 | } | |
96 | /*}}}*/ | |
97 | static void lock_database(char *path)/*{{{*/ | |
98 | { | |
99 | struct utsname uu; | |
100 | struct passwd *pw; | |
101 | int pid; | |
102 | int len; | |
103 | char *tname; | |
104 | struct stat sb; | |
105 | FILE *out; | |
106 | ||
107 | if (uname(&uu) < 0) { | |
108 | perror("uname"); | |
109 | exit(1); | |
110 | } | |
111 | pw = getpwuid(getuid()); | |
112 | if (!pw) { | |
113 | perror("getpwuid"); | |
114 | exit(1); | |
115 | } | |
116 | pid = getpid(); | |
117 | len = 1 + strlen(path) + 5; | |
118 | lock_file_name = new_array(char, len); | |
119 | sprintf(lock_file_name, "%s.lock", path); | |
120 | ||
121 | if (forced_unlock) { | |
122 | unlock_database(); | |
123 | forced_unlock = 0; | |
124 | } | |
125 | ||
126 | len += strlen(uu.nodename); | |
127 | /* add on max width of pid field (allow up to 32 bit pid_t) + 2 '.' chars */ | |
128 | len += (10 + 2); | |
129 | tname = new_array(char, len); | |
130 | sprintf(tname, "%s.%d.%s", lock_file_name, pid, uu.nodename); | |
131 | out = fopen(tname, "w"); | |
132 | if (!out) { | |
133 | fprintf(stderr, "Cannot open lock file %s for writing\n", tname); | |
134 | exit(1); | |
135 | } | |
136 | fprintf(out, "%d,%s,%s\n", pid, uu.nodename, pw->pw_name); | |
137 | fclose(out); | |
138 | ||
139 | if (link(tname, lock_file_name) < 0) { | |
140 | /* check if link count==2 */ | |
141 | if (stat(tname, &sb) < 0) { | |
142 | fprintf(stderr, "Could not stat the lock file\n"); | |
143 | unlink(tname); | |
144 | exit(1); | |
145 | } else { | |
146 | if (sb.st_nlink != 2) { | |
147 | FILE *in; | |
148 | in = fopen(lock_file_name, "r"); | |
149 | if (in) { | |
150 | char line[2048]; | |
151 | fgets(line, sizeof(line), in); | |
152 | line[strlen(line)-1] = 0; /* strip trailing newline */ | |
153 | fprintf(stderr, "Database %s appears to be locked by (pid,node,user)=(%s)\n", path, line); | |
154 | unlink(tname); | |
155 | exit(1); | |
156 | } | |
157 | } else { | |
158 | /* lock succeeded apparently */ | |
159 | } | |
160 | } | |
161 | } else { | |
162 | /* lock succeeded apparently */ | |
163 | } | |
164 | unlink(tname); | |
165 | free(tname); | |
166 | return; | |
167 | } | |
168 | /*}}}*/ | |
169 | #else | |
170 | static volatile void unlock_and_exit(int code)/*{{{*/ | |
171 | { | |
172 | exit(code); | |
173 | } | |
174 | /*}}}*/ | |
175 | #endif /* USE_DOTLOCK */ | |
176 | ||
177 | static char *get_database_path(int traverse_up)/*{{{*/ | |
178 | { | |
179 | char *env_var; | |
180 | env_var = getenv("TDL_DATABASE"); | |
181 | if (env_var) { | |
182 | return env_var; | |
183 | } else { | |
184 | int at_root, orig_size, size, dbname_len, found, stat_result; | |
185 | char *orig_cwd, *cwd, *result, *filename; | |
186 | struct stat statbuf; | |
187 | ||
188 | dbname_len = strlen(DBNAME); | |
189 | size = 16; | |
190 | orig_size = 16; | |
191 | found = 0; | |
192 | at_root = 0; | |
193 | cwd = new_array(char, size); | |
194 | orig_cwd = new_array(char, orig_size); | |
195 | do { | |
196 | result = getcwd(orig_cwd, orig_size); | |
197 | if (!result) { | |
198 | if (errno == ERANGE) { | |
199 | orig_size <<= 1; | |
200 | orig_cwd = grow_array(char, orig_size, orig_cwd); | |
201 | } else { | |
202 | fprintf(stderr, "Unexpected error reading current directory\n"); | |
203 | unlock_and_exit(1); | |
204 | } | |
205 | } | |
206 | } while (!result); | |
207 | filename = new_array(char, size + dbname_len + 2); | |
208 | filename[0] = 0; | |
209 | do { | |
210 | result = getcwd(cwd, size); | |
211 | if (!result && (errno == ERANGE)) { | |
212 | size <<= 1; | |
213 | cwd = grow_array(char, size, cwd); | |
214 | filename = grow_array(char, size + dbname_len + 2, filename); | |
215 | } else { | |
216 | if (!strcmp(cwd, "/")) { | |
217 | at_root = 1; | |
218 | } | |
219 | strcpy(filename, cwd); | |
220 | strcat(filename, "/"); | |
221 | strcat(filename, DBNAME); | |
222 | stat_result = stat(filename, &statbuf); | |
223 | if ((stat_result >= 0) && (statbuf.st_mode & 0600)) { | |
224 | found = 1; | |
225 | break; | |
226 | } | |
227 | ||
228 | if (!traverse_up) break; | |
229 | ||
230 | /* Otherwise, go up a level */ | |
231 | chdir (".."); | |
232 | } | |
233 | } while (!at_root); | |
234 | ||
235 | free(cwd); | |
236 | ||
237 | /* Reason for this : if using create in a subdirectory of a directory | |
238 | * already containing a .tdldb, the cwd after the call here from main would | |
239 | * get left pointing at the directory containing the .tdldb that already | |
240 | * exists, making the call here from process_create() fail. So go back to | |
241 | * the directory where we started. */ | |
242 | chdir(orig_cwd); | |
243 | free(orig_cwd); | |
244 | ||
245 | if (found) { | |
246 | return filename; | |
247 | } else { | |
248 | return default_database_path; | |
249 | } | |
250 | } | |
251 | ||
252 | } | |
253 | /*}}}*/ | |
254 | static void rename_database(char *path)/*{{{*/ | |
255 | { | |
256 | int len; | |
257 | char *pathbak; | |
258 | ||
259 | len = strlen(path); | |
260 | pathbak = new_array(char, len + 5); | |
261 | strcpy(pathbak, path); | |
262 | strcat(pathbak, ".bak"); | |
263 | if (rename(path, pathbak) < 0) { | |
264 | if (is_noisy) { | |
265 | perror("warning, couldn't save backup database:"); | |
266 | } | |
267 | } | |
268 | free(pathbak); | |
269 | return; | |
270 | } | |
271 | /*}}}*/ | |
272 | static char *executable_name(char *argv0)/*{{{*/ | |
273 | { | |
274 | char *p; | |
275 | for (p=argv0; *p; p++) ; | |
276 | for (; p>=argv0; p--) { | |
277 | if (*p == '/') return (p+1); | |
278 | } | |
279 | return argv0; | |
280 | } | |
281 | /*}}}*/ | |
282 | static void load_database(char *path) /*{{{*/ | |
283 | /* Return 1 if successful, 0 if no database was found */ | |
284 | { | |
285 | FILE *in; | |
286 | currently_dirty = 0; | |
287 | #ifdef USE_DOTLOCK | |
288 | if (!read_only) { | |
289 | lock_database(path); | |
290 | } | |
291 | #endif | |
292 | in = fopen(path, "rb"); | |
293 | if (in) { | |
294 | /* Database may not exist, e.g. if the program has never been run before. | |
295 | */ | |
296 | read_database(in, &top); | |
297 | fclose(in); | |
298 | is_loaded = 1; | |
299 | } else { | |
300 | if (is_noisy) { | |
301 | fprintf(stderr, "warning: no database found above this directory\n"); | |
302 | } | |
303 | } | |
304 | } | |
305 | /*}}}*/ | |
306 | void load_database_if_not_loaded(void)/*{{{*/ | |
307 | { | |
308 | if (!is_loaded) { | |
309 | load_database(current_database_path); | |
310 | is_loaded = 1; | |
311 | } | |
312 | } | |
313 | /*}}}*/ | |
314 | static mode_t get_mode(const char *path)/*{{{*/ | |
315 | { | |
316 | mode_t result; | |
317 | const mode_t default_result = 0600; /* access to user only. */ | |
318 | struct stat sb; | |
319 | if (stat(path, &sb) < 0) { | |
320 | result = default_result; | |
321 | } else { | |
322 | if (!S_ISREG(sb.st_mode)) { | |
323 | fprintf(stderr, "Warning : existing database is not a regular file!\n"); | |
324 | result = default_result; | |
325 | } else { | |
326 | result = sb.st_mode & (S_IRWXU | S_IRWXG | S_IRWXO); | |
327 | } | |
328 | } | |
329 | return result; | |
330 | } | |
331 | /*}}}*/ | |
332 | static void save_database(char *path)/*{{{*/ | |
333 | { | |
334 | FILE *out = NULL; | |
335 | int out_fd; | |
336 | mode_t database_mode; | |
337 | if (read_only) { | |
338 | fprintf(stderr, "Warning : database opened read-only. Not saving.\n"); | |
339 | return; | |
340 | } | |
341 | if (is_loaded && currently_dirty) { | |
342 | database_mode = get_mode(path); | |
343 | ||
344 | /* The next line only used to happen if the command wasn't 'create'. | |
345 | * However, it should quietly fail for create, where the existing database | |
346 | * doesn't exist */ | |
347 | rename_database(path); | |
348 | ||
349 | /* Open database this way so that the permissions from the existing | |
350 | database can be duplicated onto the new one in way free of race | |
351 | conditions. */ | |
352 | out_fd = open(path, O_WRONLY | O_CREAT | O_EXCL, database_mode); | |
353 | if (out_fd < 0) { | |
354 | fprintf(stderr, "Could not open new database %s for writing : %s\n", | |
355 | path, strerror(errno)); | |
356 | unlock_and_exit(1); | |
357 | } else { | |
358 | /* Normal case */ | |
359 | out = fdopen(out_fd, "wb"); | |
360 | } | |
361 | if (!out) { | |
362 | fprintf(stderr, "Cannot open database %s for writing\n", path); | |
363 | unlock_and_exit(1); | |
364 | } | |
365 | write_database(out, &top); | |
366 | fclose(out); | |
367 | } | |
368 | currently_dirty = 0; | |
369 | return; | |
370 | } | |
371 | /*}}}*/ | |
372 | void free_database(struct links *x)/*{{{*/ | |
373 | { | |
374 | struct node *y; | |
375 | struct node *next; | |
376 | for (y=x->next; y != (struct node *) x; y = next) { | |
377 | free_database(&y->kids); | |
378 | free(y->text); | |
379 | next = y->chain.next; | |
380 | free(y); | |
381 | } | |
382 | x->next = x->prev = (struct node *) x; | |
383 | } | |
384 | /*}}}*/ | |
385 | ||
386 | /* {{{ One line descriptions of the subcommands */ | |
387 | static char desc_above[] = "Move entries above (before) another entry"; | |
388 | static char desc_add[] = "Add a new entry to the database"; | |
389 | static char desc_after[] = "Move entries after (below) another entry"; | |
390 | static char desc_before[] = "Move entries before (above) another entry"; | |
391 | static char desc_below[] = "Move entries below (after) another entry"; | |
392 | static char desc_clone[] = "Make deep copy of one or more entries"; | |
393 | static char desc_copyto[] = "Insert deep copy of one or more entries under another entry"; | |
394 | static char desc_create[] = "Create a new database in the current directory"; | |
395 | static char desc_defer[] = "Put off starting some tasks until a given time"; | |
396 | static char desc_delete[] = "Remove 1 or more entries from the database"; | |
397 | static char desc_done[] = "Mark 1 or more entries as done"; | |
398 | static char desc_edit[] = "Change the text of an entry"; | |
399 | static char desc_exit[] = "Exit program, saving database"; | |
400 | static char desc_export[] = "Export entries to another database"; | |
401 | static char desc_help[] = "Display help information"; | |
402 | static char desc_import[] = "Import entries from another database"; | |
403 | static char desc_ignore[] = "Postpone or partially remove 1 or more entries"; | |
404 | static char desc_into[] = "Move entries to end of new parent"; | |
405 | static char desc_list[] = "List entries in database (default from top node)"; | |
406 | static char desc_log[] = "Add a new entry to the database, mark it done as well"; | |
407 | static char desc_moveto[] = "Move entries to end of new parent"; | |
408 | static char desc_narrow[] = "Restrict actions to part of the database"; | |
409 | static char desc_open[] = "Move one or more entries out of postponed/deferred state"; | |
410 | static char desc_postpone[] = "Make one or more entries postponed indefinitely"; | |
411 | static char desc_priority[] = "Change the priority of 1 or more entries"; | |
412 | static char desc_purge[] = "Remove old done entries in subtrees"; | |
413 | static char desc_quit[] = "Exit program, NOT saving database"; | |
414 | static char desc_remove[] = "Remove 1 or more entries from the database"; | |
415 | static char desc_report[] = "Report completed tasks in interval"; | |
416 | static char desc_revert[] = "Discard changes and reload previous database from disc"; | |
417 | static char desc_save[] = "Save the database back to disc and keep working"; | |
418 | static char desc_undo[] = "Mark 1 or more entries as not done (cancel effect of 'done')"; | |
419 | static char desc_usage[] = "Display help information"; | |
420 | static char desc_version[] = "Display program version"; | |
421 | static char desc_which[] = "Display filename of database being used"; | |
422 | static char desc_widen[] = "Widen the part of the database to which actions apply"; | |
423 | ||
424 | /* }}} */ | |
425 | /* {{{ Synopsis of each subcommand */ | |
426 | static char synop_above[] = "<index_to_insert_above> <index_to_move> ..."; | |
427 | static char synop_add[] = "[@<datespec>] [<parent_index>] [<priority>] <entry_text>"; | |
428 | static char synop_after[] = "<index_to_insert_below> <index_to_move> ..."; | |
429 | static char synop_before[] = "<index_to_insert_above> <index_to_move> ..."; | |
430 | static char synop_below[] = "<index_to_insert_below> <index_to_move> ..."; | |
431 | static char synop_clone[] = "<index_to_clone> ..."; | |
432 | static char synop_copyto[] = "<parent_index> <index_to_clone> ..."; | |
433 | static char synop_create[] = ""; | |
434 | static char synop_defer[] = "[@]<datespec> <entry_index>{...] ..."; | |
435 | static char synop_delete[] = "<entry_index>[...] ..."; | |
436 | static char synop_done[] = "[@<datespec>] <entry_index>[...] ..."; | |
437 | static char synop_edit[] = "<entry_index> [<new_text>]"; | |
438 | static char synop_exit[] = ""; | |
439 | static char synop_export[] = "<filename> <entry_index> ..."; | |
440 | static char synop_help[] = "[<command-name>]"; | |
441 | static char synop_ignore[] = "<entry_index>[...] ..."; | |
442 | static char synop_import[] = "<filename>"; | |
443 | static char synop_into[] = "<new_parent_index> <index_to_move> ..."; | |
444 | static char synop_list[] = "[-v] [-a] [-p] [-m] [-1..9] [<min-priority>] [<parent_index>|/<search_condition>...]\n" | |
445 | "-v : verbose (show dates, priorities etc)\n" | |
446 | "-a : show all entries, including 'done' ones\n" | |
447 | "-p : show deferred and postponed entries\n" | |
448 | "-m : don't use colours (monochrome)\n" | |
449 | "-1,-2,..,-9 : summarise (and don't show) entries below this depth\n" | |
450 | "<search_condition> : word to match on"; | |
451 | static char synop_log[] = "[@<datespec>] [<parent_index>] [<priority>] <entry_text>"; | |
452 | static char synop_moveto[] = "<new_parent_index> <index_to_move> ..."; | |
453 | static char synop_narrow[] = "<entry_index>"; | |
454 | static char synop_open[] = "<entry_index>[...] ..."; | |
455 | static char synop_postpone[] = "<entry_index>[...] ..."; | |
456 | static char synop_priority[] = "<new_priority> <entry_index>[...] ..."; | |
457 | static char synop_purge[] = "<since_datespec> [<ancestor_index> ...]"; | |
458 | static char synop_quit[] = ""; | |
459 | static char synop_remove[] = "<entry_index>[...] ..."; | |
460 | static char synop_report[] = "<start_datespec> [<end_datespec>]\n" | |
461 | "(end defaults to now)"; | |
462 | static char synop_revert[] = ""; | |
463 | static char synop_save[] = ""; | |
464 | static char synop_undo[] = "<entry_index>[...] ..."; | |
465 | static char synop_usage[] = "[<command-name>]"; | |
466 | static char synop_version[] = ""; | |
467 | static char synop_which[] = ""; | |
468 | static char synop_widen[] = "[<levels>]"; | |
469 | /* }}} */ | |
470 | ||
471 | static int process_create(char **x)/*{{{*/ | |
472 | { | |
473 | char *dbpath = get_database_path(0); | |
474 | struct stat sb; | |
475 | int result; | |
476 | ||
477 | result = stat(dbpath, &sb); | |
478 | if (result >= 0) { | |
479 | fprintf(stderr, "Can't create database <%s>, it already exists!\n", dbpath); | |
480 | return -1; | |
481 | } else { | |
482 | if (read_only) { | |
483 | fprintf(stderr, "Can't create database <%s> in read-only mode!\n", dbpath); | |
484 | return -1; | |
485 | } | |
486 | /* Should have an empty database, and the dirty flag will be set */ | |
487 | current_database_path = dbpath; | |
488 | /* don't emit complaint about not being able to move database to its backup */ | |
489 | is_noisy = 0; | |
490 | /* Force empty database to be written out */ | |
491 | is_loaded = currently_dirty = 1; | |
492 | return 0; | |
493 | } | |
494 | } | |
495 | /*}}}*/ | |
496 | static int process_priority(char **x)/*{{{*/ | |
497 | { | |
498 | int error; | |
499 | enum Priority priority; | |
500 | struct node *n; | |
501 | int do_descendents; | |
502 | ||
503 | priority = parse_priority(*x, &error); | |
504 | if (error < 0) { | |
505 | fprintf(stderr, "usage: priority %s\n", synop_priority); | |
506 | return error; | |
507 | } | |
508 | ||
509 | while (*++x) { | |
510 | do_descendents = include_descendents(*x); /* May modify *x */ | |
511 | n = lookup_node(*x, 0, NULL); | |
512 | if (!n) return -1; | |
513 | n->priority = priority; | |
514 | if (do_descendents) { | |
515 | set_descendent_priority(n, priority); | |
516 | } | |
517 | } | |
518 | ||
519 | return 0; | |
520 | }/*}}}*/ | |
521 | static int process_which(char **argv)/*{{{*/ | |
522 | { | |
523 | printf("%s\n", current_database_path); | |
524 | return 0; | |
525 | } | |
526 | /*}}}*/ | |
527 | static int process_version(char **x)/*{{{*/ | |
528 | { | |
529 | fprintf(stderr, "tdl %s\n", PROGRAM_VERSION); | |
530 | return 0; | |
531 | } | |
532 | /*}}}*/ | |
533 | static int process_exit(char **x)/*{{{*/ | |
534 | { | |
535 | save_database(current_database_path); | |
536 | free_database(&top); | |
537 | unlock_and_exit(0); | |
538 | return 0; /* moot */ | |
539 | } | |
540 | /*}}}*/ | |
541 | static int process_quit(char **x)/*{{{*/ | |
542 | { | |
543 | /* Just get out quick, don't write the database back */ | |
544 | char ans[4]; | |
545 | if (currently_dirty) { | |
546 | printf(" WARNING: if you quit, all changes to database will be lost!\n" | |
547 | " Use command 'exit' instead of 'quit' if you wish to save data.\n" | |
548 | " Really quit [y/N]? "); | |
549 | fgets (ans, 4, stdin); | |
550 | if (strcasecmp(ans,"y\n") != 0) { | |
551 | printf(" Quit canceled.\n"); | |
552 | return 0; | |
553 | } | |
554 | } | |
555 | free_database(&top); | |
556 | unlock_and_exit(0); | |
557 | return 0; /* moot */ | |
558 | } | |
559 | /*}}}*/ | |
560 | static int process_save(char **x)/*{{{*/ | |
561 | { | |
562 | /* FIXME: I'm not sure whether the behaviour here should include renaming the | |
563 | * existing disc database to become the backup file. I think the precedent | |
564 | * would be how vi or emacs handle backup files when multiple saves are done | |
565 | * within a session. */ | |
566 | save_database(current_database_path); | |
567 | return 0; | |
568 | } | |
569 | /*}}}*/ | |
570 | static int process_revert(char **x)/*{{{*/ | |
571 | { | |
572 | if (is_loaded) { | |
573 | free_database(&top); | |
574 | } | |
575 | is_loaded = currently_dirty = 0; | |
576 | return 0; | |
577 | } | |
578 | /*}}}*/ | |
579 | /* Forward prototype */ | |
580 | static int usage(char **x); | |
581 | ||
582 | struct command cmds[] = {/*{{{*/ | |
583 | {"--help", NULL, usage, desc_help, NULL, NULL, 0, 0, 3, 0, 1}, | |
584 | {"-h", NULL, usage, desc_help, NULL, NULL, 0, 0, 2, 0, 1}, | |
585 | {"-V", NULL, process_version, desc_version, NULL, NULL, 0, 0, 2, 0, 1}, | |
586 | {"above", NULL, process_above, desc_above, synop_above, NULL, 1, 1, 2, 1, 1}, | |
587 | {"add", "tdla", process_add, desc_add, synop_add, NULL, 1, 1, 2, 1, 1}, | |
588 | {"after", NULL, process_below, desc_after, synop_after, NULL, 1, 1, 2, 1, 1}, | |
589 | {"before", NULL, process_above, desc_before, synop_before, NULL, 1, 1, 3, 1, 1}, | |
590 | {"below", NULL, process_below, desc_below, synop_below, NULL, 1, 1, 3, 1, 1}, | |
591 | {"clone", NULL, process_clone, desc_clone, synop_clone, NULL, 1, 1, 2, 1, 1}, | |
592 | {"copyto", NULL, process_copyto, desc_copyto, synop_copyto, NULL, 1, 1, 2, 1, 1}, | |
593 | {"create", NULL, process_create, desc_create, synop_create, NULL, 1, 0, 2, 0, 1}, | |
594 | {"defer", NULL, process_defer, desc_defer, synop_defer, NULL, 1, 1, 3, 1, 1}, | |
595 | {"delete", NULL, process_remove, desc_delete, synop_delete, NULL, 1, 1, 3, 1, 1}, | |
596 | {"done", "tdld", process_done, desc_done, synop_done, complete_done, 1, 1, 2, 1, 1}, | |
597 | {"edit", NULL, process_edit, desc_edit, synop_edit, NULL, 1, 1, 2, 1, 1}, | |
598 | {"exit", NULL, process_exit, desc_exit, synop_exit, NULL, 0, 0, 3, 1, 0}, | |
599 | {"export", NULL, process_export, desc_export, synop_export, NULL, 0, 1, 3, 1, 1}, | |
600 | {"help", NULL, usage, desc_help, synop_help, complete_help, 0, 0, 1, 1, 1}, | |
601 | {"ignore", NULL, process_ignore, desc_ignore, synop_ignore, complete_done, 1, 1, 2, 1, 1}, | |
602 | {"import", NULL, process_import, desc_import, synop_import, NULL, 1, 1, 2, 1, 1}, | |
603 | {"into", NULL, process_into, desc_into, synop_into, NULL, 1, 1, 2, 1, 1}, | |
604 | {"list", "tdll", process_list, desc_list, synop_list, complete_list, 0, 1, 2, 1, 1}, | |
605 | {"ls", "tdls", process_list, desc_list, synop_list, complete_list, 0, 1, 2, 1, 1}, | |
606 | {"log", "tdlg", process_log, desc_log, synop_log, NULL, 1, 1, 2, 1, 1}, | |
607 | {"moveto", NULL, process_into, desc_moveto, synop_moveto, NULL, 1, 1, 1, 1, 1}, | |
608 | {"narrow", NULL, process_narrow, desc_narrow, synop_narrow, NULL, 0, 1, 1, 1, 0}, | |
609 | {"open", NULL, process_open, desc_open, synop_open, complete_open, 1, 1, 1, 1, 1}, | |
610 | {"postpone", NULL, process_postpone, desc_postpone,synop_postpone,complete_postpone, 1, 1, 2, 1, 1}, | |
611 | {"priority", NULL, process_priority, desc_priority,synop_priority,complete_priority, 1, 1, 2, 1, 1}, | |
612 | {"purge", NULL, process_purge, desc_purge, synop_purge, NULL, 1, 1, 2, 1, 1}, | |
613 | {"quit", NULL, process_quit, desc_quit, synop_quit, NULL, 0, 0, 1, 1, 0}, | |
614 | {"remove", NULL, process_remove, desc_remove, synop_remove, NULL, 1, 1, 3, 1, 1}, | |
615 | {"report", NULL, process_report, desc_report, synop_report, NULL, 0, 1, 3, 1, 1}, | |
616 | {"revert", NULL, process_revert, desc_revert, synop_revert, NULL, 0, 0, 3, 1, 0}, | |
617 | {"save", NULL, process_save, desc_save, synop_save, NULL, 0, 1, 1, 1, 0}, | |
618 | {"undo", NULL, process_undo, desc_undo, synop_undo, NULL, 1, 1, 2, 1, 1}, | |
619 | {"usage", NULL, usage, desc_usage, synop_usage, complete_help, 0, 0, 2, 1, 1}, | |
620 | {"version", NULL, process_version, desc_version, synop_version, NULL, 0, 0, 1, 1, 1}, | |
621 | {"which", NULL, process_which, desc_which, synop_which, NULL, 0, 0, 2, 1, 1}, | |
622 | {"widen", NULL, process_widen, desc_widen, synop_widen, NULL, 0, 1, 2, 1, 0} | |
623 | };/*}}}*/ | |
624 | int n_cmds = 0; | |
625 | ||
626 | #define N(x) (sizeof(x) / sizeof(x[0])) | |
627 | ||
628 | static int is_processing = 0; | |
629 | static int signal_count = 0; | |
630 | ||
631 | static void handle_signal(int a)/*{{{*/ | |
632 | { | |
633 | signal_count++; | |
634 | /* And close stdin, which should cause readline() in inter.c to return | |
635 | * immediately if it was active when the signal arrived. */ | |
636 | close(0); | |
637 | ||
638 | if (signal_count == 3) { | |
639 | /* User is desperately hitting ^C to stop the program. Bail out without tidying up, and give a warning. */ | |
640 | static char msg[] = "About to force exit due to repeated termination signals.\n" | |
641 | "Database changes since the last save will be LOST.\n"; | |
642 | write(2, msg, strlen(msg)); | |
643 | } | |
644 | if (signal_count == 4) { | |
645 | static char msg[] = "The database may be left locked.\n" | |
646 | "You will need to run 'tdl -u' next time to unlock it.\n"; | |
647 | write(2, msg, strlen(msg)); | |
648 | exit(1); | |
649 | } | |
650 | } | |
651 | /*}}}*/ | |
652 | static void guarded_sigaction(int signum, struct sigaction *sa)/*{{{*/ | |
653 | { | |
654 | if (sigaction(signum, sa, NULL) < 0) { | |
655 | perror("sigaction"); | |
656 | unlock_and_exit(1); | |
657 | } | |
658 | } | |
659 | /*}}}*/ | |
660 | static void setup_signals(void)/*{{{*/ | |
661 | { | |
662 | struct sigaction sa; | |
663 | if (sigemptyset(&sa.sa_mask) < 0) { | |
664 | perror("sigemptyset"); | |
665 | unlock_and_exit(1); | |
666 | } | |
667 | sa.sa_handler = handle_signal; | |
668 | sa.sa_flags = 0; | |
669 | #if 0 | |
670 | guarded_sigaction(SIGHUP, &sa); | |
671 | guarded_sigaction(SIGINT, &sa); | |
672 | guarded_sigaction(SIGQUIT, &sa); | |
673 | guarded_sigaction(SIGTERM, &sa); | |
674 | #endif | |
675 | ||
676 | return; | |
677 | } | |
678 | /*}}}*/ | |
679 | static void print_copyright(void)/*{{{*/ | |
680 | { | |
681 | fprintf(stderr, | |
682 | "tdl %s, Copyright (C) 2001,2002,2003,2004,2005 Richard P. Curnow\n" | |
683 | "tdl comes with ABSOLUTELY NO WARRANTY.\n" | |
684 | "This is free software, and you are welcome to redistribute it\n" | |
685 | "under certain conditions; see the GNU General Public License for details.\n\n", | |
686 | PROGRAM_VERSION); | |
687 | } | |
688 | /*}}}*/ | |
689 | void dispatch(char **argv) /* and other args *//*{{{*/ | |
690 | { | |
691 | int i, p_len, matchlen, index=-1; | |
692 | char *executable; | |
693 | int is_tdl; | |
694 | char **p, **pp; | |
695 | ||
696 | if (signal_count > 0) { | |
697 | save_database(current_database_path); | |
698 | unlock_and_exit(0); | |
699 | } | |
700 | ||
701 | executable = executable_name(argv[0]); | |
702 | is_tdl = (!strcmp(executable, "tdl")); | |
703 | ||
704 | p = argv + 1; | |
705 | while (*p && *p[0] == '-') p++; | |
706 | ||
707 | /* Parse command line */ | |
708 | if (is_tdl && !*p) { | |
709 | /* If no arguments, go into interactive mode, but only if we didn't come from there (!) */ | |
710 | if (!is_interactive) { | |
711 | setup_signals(); | |
712 | print_copyright(); | |
713 | is_interactive = 1; | |
714 | interactive(); | |
715 | } | |
716 | return; | |
717 | } | |
718 | ||
719 | if (is_tdl) { | |
720 | p_len = strlen(*p); | |
721 | for (i=0; i<n_cmds; i++) { | |
722 | matchlen = p_len < cmds[i].matchlen ? cmds[i].matchlen : p_len; | |
723 | if ((is_interactive ? cmds[i].interactive_ok : cmds[i].non_interactive_ok) && | |
724 | !strncmp(cmds[i].name, *p, matchlen)) { | |
725 | index = i; | |
726 | break; | |
727 | } | |
728 | } | |
729 | } else { | |
730 | for (i=0; i<n_cmds; i++) { | |
731 | if (cmds[i].shortcut && !strcmp(cmds[i].shortcut, executable)) { | |
732 | index = i; | |
733 | break; | |
734 | } | |
735 | } | |
736 | } | |
737 | ||
738 | /* Skip commands that dirty the database, if it was opened read-only. */ | |
739 | if (index >= 0 && cmds[index].dirty && read_only) { | |
740 | fprintf(stderr, "Can't use command <%s> in read-only mode\n", | |
741 | cmds[index].name); | |
742 | if (!is_interactive) { | |
743 | unlock_and_exit(-1); | |
744 | } | |
745 | } else if (index >= 0) { | |
746 | int result; | |
747 | ||
748 | is_processing = 1; | |
749 | ||
750 | if (!is_loaded && cmds[index].load_db) { | |
751 | load_database(current_database_path); | |
752 | } | |
753 | ||
754 | pp = is_tdl ? (p + 1) : p; | |
755 | result = (cmds[index].func)(pp); | |
756 | ||
757 | /* Check for failure */ | |
758 | if (result < 0) { | |
759 | if (!is_interactive) { | |
760 | unlock_and_exit(-result); | |
761 | } | |
762 | ||
763 | /* If interactive, the handling function has emitted its error message. | |
764 | * Just 'abort' this command and go back to the prompt */ | |
765 | ||
766 | } else { | |
767 | ||
768 | if (cmds[index].dirty) { | |
769 | currently_dirty = 1; | |
770 | } | |
771 | } | |
772 | ||
773 | is_processing = 0; | |
774 | if (signal_count > 0) { | |
775 | save_database(current_database_path); | |
776 | unlock_and_exit(0); | |
777 | } | |
778 | ||
779 | } else { | |
780 | if (is_tdl && *p) { | |
781 | fprintf(stderr, "tdl: Unknown command <%s>\n", *p); | |
782 | } else { | |
783 | fprintf(stderr, "tdl: Unknown command\n"); | |
784 | } | |
785 | if (!is_interactive) { | |
786 | unlock_and_exit(1); | |
787 | } | |
788 | } | |
789 | ||
790 | } | |
791 | /*}}}*/ | |
792 | static int usage(char **x)/*{{{*/ | |
793 | { | |
794 | int i, index; | |
795 | char *cmd = *x; | |
796 | ||
797 | if (cmd) { | |
798 | /* Detailed help for the one command */ | |
799 | index = -1; | |
800 | for (i=0; i<n_cmds; i++) { | |
801 | if (!strncmp(cmds[i].name, cmd, 3) && | |
802 | (is_interactive ? cmds[i].interactive_ok : cmds[i].non_interactive_ok)) { | |
803 | index = i; | |
804 | break; | |
805 | } | |
806 | } | |
807 | if (index >= 0) { | |
808 | fprintf(stdout, "Description\n %s\n\n", cmds[i].descrip); | |
809 | fprintf(stdout, "Synopsis\n"); | |
810 | ||
811 | if (is_interactive) { | |
812 | fprintf(stdout, " %s %s\n", cmds[i].name, cmds[i].synopsis ? cmds[i].synopsis : ""); | |
813 | } else { | |
814 | fprintf(stdout, " tdl [-qR] %s %s\n", cmds[i].name, cmds[i].synopsis ? cmds[i].synopsis : ""); | |
815 | if (cmds[i].shortcut) { | |
816 | fprintf(stdout, " %s [-qR] %s\n", cmds[i].shortcut, cmds[i].synopsis ? cmds[i].synopsis : ""); | |
817 | } | |
818 | } | |
819 | ||
820 | fprintf(stdout, | |
821 | "\n" | |
822 | "General notes (where they apply to a command):\n" | |
823 | "\n" | |
824 | "<*_index> : 1, 1.1 etc (see output of 'tdl list')\n" | |
825 | "<priority> : urgent|high|normal|low|verylow\n" | |
826 | "<datespec> : [-|+][0-9]+[shdwmy][-hh[mm[ss]]] OR\n" | |
827 | " [-|+](sun|mon|tue|wed|thu|fri|sat)[-hh[mm[ss]]] OR\n" | |
828 | " [[[cc]yy]mm]dd[-hh[mm[ss]]]\n" | |
829 | "<text> : Any text (you'll need to quote it if >1 word)\n" | |
830 | ); | |
831 | ||
832 | } else { | |
833 | fprintf(stderr, "Unrecognized command <%s>, no help available\n", cmd); | |
834 | } | |
835 | ||
836 | } else { | |
837 | print_copyright(); | |
838 | ||
839 | if (!is_interactive) { | |
840 | fprintf(stdout, "tdl [-qR] : Enter interactive mode\n"); | |
841 | } | |
842 | for (i=0; i<n_cmds; i++) { | |
843 | if (is_interactive) { | |
844 | if (cmds[i].interactive_ok) { | |
845 | fprintf(stdout, "%-8s : %s\n", cmds[i].name, cmds[i].descrip); | |
846 | } | |
847 | } else { | |
848 | if (cmds[i].non_interactive_ok) { | |
849 | fprintf(stdout, "tdl [-qR] %-8s : %s\n", cmds[i].name, cmds[i].descrip); | |
850 | if (cmds[i].shortcut) { | |
851 | fprintf(stdout, "%s [-qR] : %s\n", cmds[i].shortcut, cmds[i].descrip); | |
852 | } | |
853 | } | |
854 | } | |
855 | } | |
856 | if (is_interactive) { | |
857 | fprintf(stdout, "\nEnter 'help <command-name>' for more help on a particular command\n"); | |
858 | } else { | |
859 | fprintf(stdout, "\nEnter 'tdl help <command-name>' for more help on a particular command\n"); | |
860 | } | |
861 | } | |
862 | ||
863 | fprintf(stdout, "\n"); | |
864 | ||
865 | return 0; | |
866 | ||
867 | } | |
868 | /*}}}*/ | |
869 | ||
870 | /*{{{ int main (int argc, char **argv)*/ | |
871 | int main (int argc, char **argv) | |
872 | { | |
873 | int i = 0; | |
874 | n_cmds = N(cmds); | |
875 | is_interactive = 0; | |
876 | ||
877 | /* Initialise database */ | |
878 | top.prev = (struct node *) ⊤ | |
879 | top.next = (struct node *) ⊤ | |
880 | ||
881 | if (argc > 1) { | |
882 | for (i=1; i<argc && argv[i][0] == '-'; i++) { | |
883 | if (strspn(argv[i]+1, "qRu")+1 != strlen(argv[i])) { | |
884 | fprintf(stderr, "Unknown flag <%s>\n", argv[i]); | |
885 | return 1; | |
886 | } | |
887 | ||
888 | if (strchr(argv[i], 'q')) { | |
889 | is_noisy = 0; | |
890 | } | |
891 | if (strchr(argv[i], 'R')) { | |
892 | read_only = 1; | |
893 | } | |
894 | if (strchr(argv[i], 'u')) { | |
895 | forced_unlock = 1; | |
896 | } | |
897 | } | |
898 | } | |
899 | ||
900 | current_database_path = get_database_path(1); | |
901 | ||
902 | dispatch(argv); | |
903 | ||
904 | if (! read_only) { | |
905 | save_database(current_database_path); | |
906 | } | |
907 | free_database(&top); | |
908 | unlock_and_exit(0); | |
909 | return 0; /* moot */ | |
910 | } | |
911 | /*}}}*/ | |
912 |