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9255ee31 EZ |
1 | /* Copyright (C) 1987-2002 Free Software Foundation, Inc. |
2 | ||
3 | This file is part of the GNU Readline Library, a library for | |
4 | reading lines of text with interactive input and history editing. | |
5 | ||
6 | The GNU Readline Library is free software; you can redistribute it | |
7 | and/or modify it under the terms of the GNU General Public License | |
8 | as published by the Free Software Foundation; either version 2, or | |
9 | (at your option) any later version. | |
10 | ||
11 | The GNU Readline Library is distributed in the hope that it will be | |
12 | useful, but WITHOUT ANY WARRANTY; without even the implied warranty | |
13 | of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | The GNU General Public License is often shipped with GNU software, and | |
17 | is generally kept in a file called COPYING or LICENSE. If you do not | |
18 | have a copy of the license, write to the Free Software Foundation, | |
19 | 59 Temple Place, Suite 330, Boston, MA 02111 USA. */ | |
20 | ||
d60d9f65 SS |
21 | /* fileman.c -- A tiny application which demonstrates how to use the |
22 | GNU Readline library. This application interactively allows users | |
23 | to manipulate files and their modes. */ | |
d60d9f65 SS |
24 | |
25 | #ifdef HAVE_CONFIG_H | |
1b17e766 | 26 | # include <config.h> |
d60d9f65 SS |
27 | #endif |
28 | ||
29 | #include <sys/types.h> | |
30 | #ifdef HAVE_SYS_FILE_H | |
1b17e766 | 31 | # include <sys/file.h> |
d60d9f65 SS |
32 | #endif |
33 | #include <sys/stat.h> | |
34 | ||
1b17e766 EZ |
35 | #ifdef HAVE_UNISTD_H |
36 | # include <unistd.h> | |
37 | #endif | |
38 | ||
39 | #include <fcntl.h> | |
d60d9f65 SS |
40 | #include <stdio.h> |
41 | #include <errno.h> | |
42 | ||
43 | #if defined (HAVE_STRING_H) | |
44 | # include <string.h> | |
45 | #else /* !HAVE_STRING_H */ | |
46 | # include <strings.h> | |
47 | #endif /* !HAVE_STRING_H */ | |
48 | ||
1b17e766 EZ |
49 | #ifdef HAVE_STDLIB_H |
50 | # include <stdlib.h> | |
51 | #endif | |
52 | ||
d60d9f65 SS |
53 | #ifdef READLINE_LIBRARY |
54 | # include "readline.h" | |
55 | # include "history.h" | |
56 | #else | |
57 | # include <readline/readline.h> | |
58 | # include <readline/history.h> | |
59 | #endif | |
60 | ||
d60d9f65 SS |
61 | extern char *xmalloc (); |
62 | ||
63 | /* The names of functions that actually do the manipulation. */ | |
9255ee31 EZ |
64 | int com_list PARAMS((char *)); |
65 | int com_view PARAMS((char *)); | |
66 | int com_rename PARAMS((char *)); | |
67 | int com_stat PARAMS((char *)); | |
68 | int com_pwd PARAMS((char *)); | |
69 | int com_delete PARAMS((char *)); | |
70 | int com_help PARAMS((char *)); | |
71 | int com_cd PARAMS((char *)); | |
72 | int com_quit PARAMS((char *)); | |
d60d9f65 SS |
73 | |
74 | /* A structure which contains information on the commands this program | |
75 | can understand. */ | |
76 | ||
77 | typedef struct { | |
78 | char *name; /* User printable name of the function. */ | |
9255ee31 | 79 | rl_icpfunc_t *func; /* Function to call to do the job. */ |
d60d9f65 SS |
80 | char *doc; /* Documentation for this function. */ |
81 | } COMMAND; | |
82 | ||
83 | COMMAND commands[] = { | |
84 | { "cd", com_cd, "Change to directory DIR" }, | |
85 | { "delete", com_delete, "Delete FILE" }, | |
86 | { "help", com_help, "Display this text" }, | |
87 | { "?", com_help, "Synonym for `help'" }, | |
88 | { "list", com_list, "List files in DIR" }, | |
89 | { "ls", com_list, "Synonym for `list'" }, | |
90 | { "pwd", com_pwd, "Print the current working directory" }, | |
91 | { "quit", com_quit, "Quit using Fileman" }, | |
92 | { "rename", com_rename, "Rename FILE to NEWNAME" }, | |
93 | { "stat", com_stat, "Print out statistics on FILE" }, | |
94 | { "view", com_view, "View the contents of FILE" }, | |
9255ee31 | 95 | { (char *)NULL, (rl_icpfunc_t *)NULL, (char *)NULL } |
d60d9f65 SS |
96 | }; |
97 | ||
98 | /* Forward declarations. */ | |
99 | char *stripwhite (); | |
100 | COMMAND *find_command (); | |
101 | ||
102 | /* The name of this program, as taken from argv[0]. */ | |
103 | char *progname; | |
104 | ||
105 | /* When non-zero, this global means the user is done using this program. */ | |
106 | int done; | |
107 | ||
108 | char * | |
109 | dupstr (s) | |
110 | char *s; | |
111 | { | |
112 | char *r; | |
113 | ||
114 | r = xmalloc (strlen (s) + 1); | |
115 | strcpy (r, s); | |
116 | return (r); | |
117 | } | |
118 | ||
119 | main (argc, argv) | |
120 | int argc; | |
121 | char **argv; | |
122 | { | |
123 | char *line, *s; | |
124 | ||
125 | progname = argv[0]; | |
126 | ||
127 | initialize_readline (); /* Bind our completer. */ | |
128 | ||
129 | /* Loop reading and executing lines until the user quits. */ | |
130 | for ( ; done == 0; ) | |
131 | { | |
132 | line = readline ("FileMan: "); | |
133 | ||
134 | if (!line) | |
135 | break; | |
136 | ||
137 | /* Remove leading and trailing whitespace from the line. | |
138 | Then, if there is anything left, add it to the history list | |
139 | and execute it. */ | |
140 | s = stripwhite (line); | |
141 | ||
142 | if (*s) | |
143 | { | |
144 | add_history (s); | |
145 | execute_line (s); | |
146 | } | |
147 | ||
148 | free (line); | |
149 | } | |
150 | exit (0); | |
151 | } | |
152 | ||
153 | /* Execute a command line. */ | |
154 | int | |
155 | execute_line (line) | |
156 | char *line; | |
157 | { | |
158 | register int i; | |
159 | COMMAND *command; | |
160 | char *word; | |
161 | ||
162 | /* Isolate the command word. */ | |
163 | i = 0; | |
164 | while (line[i] && whitespace (line[i])) | |
165 | i++; | |
166 | word = line + i; | |
167 | ||
168 | while (line[i] && !whitespace (line[i])) | |
169 | i++; | |
170 | ||
171 | if (line[i]) | |
172 | line[i++] = '\0'; | |
173 | ||
174 | command = find_command (word); | |
175 | ||
176 | if (!command) | |
177 | { | |
178 | fprintf (stderr, "%s: No such command for FileMan.\n", word); | |
179 | return (-1); | |
180 | } | |
181 | ||
182 | /* Get argument to command, if any. */ | |
183 | while (whitespace (line[i])) | |
184 | i++; | |
185 | ||
186 | word = line + i; | |
187 | ||
188 | /* Call the function. */ | |
189 | return ((*(command->func)) (word)); | |
190 | } | |
191 | ||
192 | /* Look up NAME as the name of a command, and return a pointer to that | |
193 | command. Return a NULL pointer if NAME isn't a command name. */ | |
194 | COMMAND * | |
195 | find_command (name) | |
196 | char *name; | |
197 | { | |
198 | register int i; | |
199 | ||
200 | for (i = 0; commands[i].name; i++) | |
201 | if (strcmp (name, commands[i].name) == 0) | |
202 | return (&commands[i]); | |
203 | ||
204 | return ((COMMAND *)NULL); | |
205 | } | |
206 | ||
207 | /* Strip whitespace from the start and end of STRING. Return a pointer | |
208 | into STRING. */ | |
209 | char * | |
210 | stripwhite (string) | |
211 | char *string; | |
212 | { | |
213 | register char *s, *t; | |
214 | ||
215 | for (s = string; whitespace (*s); s++) | |
216 | ; | |
217 | ||
218 | if (*s == 0) | |
219 | return (s); | |
220 | ||
221 | t = s + strlen (s) - 1; | |
222 | while (t > s && whitespace (*t)) | |
223 | t--; | |
224 | *++t = '\0'; | |
225 | ||
226 | return s; | |
227 | } | |
228 | ||
229 | /* **************************************************************** */ | |
230 | /* */ | |
231 | /* Interface to Readline Completion */ | |
232 | /* */ | |
233 | /* **************************************************************** */ | |
234 | ||
9255ee31 EZ |
235 | char *command_generator PARAMS((const char *, int)); |
236 | char **fileman_completion PARAMS((const char *, int, int)); | |
d60d9f65 SS |
237 | |
238 | /* Tell the GNU Readline library how to complete. We want to try to complete | |
239 | on command names if this is the first word in the line, or on filenames | |
240 | if not. */ | |
241 | initialize_readline () | |
242 | { | |
243 | /* Allow conditional parsing of the ~/.inputrc file. */ | |
244 | rl_readline_name = "FileMan"; | |
245 | ||
246 | /* Tell the completer that we want a crack first. */ | |
9255ee31 | 247 | rl_attempted_completion_function = fileman_completion; |
d60d9f65 SS |
248 | } |
249 | ||
250 | /* Attempt to complete on the contents of TEXT. START and END bound the | |
251 | region of rl_line_buffer that contains the word to complete. TEXT is | |
252 | the word to complete. We can use the entire contents of rl_line_buffer | |
253 | in case we want to do some simple parsing. Return the array of matches, | |
254 | or NULL if there aren't any. */ | |
255 | char ** | |
256 | fileman_completion (text, start, end) | |
9255ee31 | 257 | const char *text; |
d60d9f65 SS |
258 | int start, end; |
259 | { | |
260 | char **matches; | |
261 | ||
262 | matches = (char **)NULL; | |
263 | ||
264 | /* If this word is at the start of the line, then it is a command | |
265 | to complete. Otherwise it is the name of a file in the current | |
266 | directory. */ | |
267 | if (start == 0) | |
9255ee31 | 268 | matches = rl_completion_matches (text, command_generator); |
d60d9f65 SS |
269 | |
270 | return (matches); | |
271 | } | |
272 | ||
273 | /* Generator function for command completion. STATE lets us know whether | |
274 | to start from scratch; without any state (i.e. STATE == 0), then we | |
275 | start at the top of the list. */ | |
276 | char * | |
277 | command_generator (text, state) | |
9255ee31 | 278 | const char *text; |
d60d9f65 SS |
279 | int state; |
280 | { | |
281 | static int list_index, len; | |
282 | char *name; | |
283 | ||
284 | /* If this is a new word to complete, initialize now. This includes | |
285 | saving the length of TEXT for efficiency, and initializing the index | |
286 | variable to 0. */ | |
287 | if (!state) | |
288 | { | |
289 | list_index = 0; | |
290 | len = strlen (text); | |
291 | } | |
292 | ||
293 | /* Return the next name which partially matches from the command list. */ | |
294 | while (name = commands[list_index].name) | |
295 | { | |
296 | list_index++; | |
297 | ||
298 | if (strncmp (name, text, len) == 0) | |
299 | return (dupstr(name)); | |
300 | } | |
301 | ||
302 | /* If no names matched, then return NULL. */ | |
303 | return ((char *)NULL); | |
304 | } | |
305 | ||
306 | /* **************************************************************** */ | |
307 | /* */ | |
308 | /* FileMan Commands */ | |
309 | /* */ | |
310 | /* **************************************************************** */ | |
311 | ||
312 | /* String to pass to system (). This is for the LIST, VIEW and RENAME | |
313 | commands. */ | |
314 | static char syscom[1024]; | |
315 | ||
316 | /* List the file(s) named in arg. */ | |
317 | com_list (arg) | |
318 | char *arg; | |
319 | { | |
320 | if (!arg) | |
321 | arg = ""; | |
322 | ||
323 | sprintf (syscom, "ls -FClg %s", arg); | |
324 | return (system (syscom)); | |
325 | } | |
326 | ||
327 | com_view (arg) | |
328 | char *arg; | |
329 | { | |
330 | if (!valid_argument ("view", arg)) | |
331 | return 1; | |
332 | ||
1b17e766 EZ |
333 | #if defined (__MSDOS__) |
334 | /* more.com doesn't grok slashes in pathnames */ | |
335 | sprintf (syscom, "less %s", arg); | |
336 | #else | |
d60d9f65 | 337 | sprintf (syscom, "more %s", arg); |
1b17e766 | 338 | #endif |
d60d9f65 SS |
339 | return (system (syscom)); |
340 | } | |
341 | ||
342 | com_rename (arg) | |
343 | char *arg; | |
344 | { | |
345 | too_dangerous ("rename"); | |
346 | return (1); | |
347 | } | |
348 | ||
349 | com_stat (arg) | |
350 | char *arg; | |
351 | { | |
352 | struct stat finfo; | |
353 | ||
354 | if (!valid_argument ("stat", arg)) | |
355 | return (1); | |
356 | ||
357 | if (stat (arg, &finfo) == -1) | |
358 | { | |
359 | perror (arg); | |
360 | return (1); | |
361 | } | |
362 | ||
363 | printf ("Statistics for `%s':\n", arg); | |
364 | ||
365 | printf ("%s has %d link%s, and is %d byte%s in length.\n", | |
366 | arg, | |
367 | finfo.st_nlink, | |
368 | (finfo.st_nlink == 1) ? "" : "s", | |
369 | finfo.st_size, | |
370 | (finfo.st_size == 1) ? "" : "s"); | |
371 | printf ("Inode Last Change at: %s", ctime (&finfo.st_ctime)); | |
372 | printf (" Last access at: %s", ctime (&finfo.st_atime)); | |
373 | printf (" Last modified at: %s", ctime (&finfo.st_mtime)); | |
374 | return (0); | |
375 | } | |
376 | ||
377 | com_delete (arg) | |
378 | char *arg; | |
379 | { | |
380 | too_dangerous ("delete"); | |
381 | return (1); | |
382 | } | |
383 | ||
384 | /* Print out help for ARG, or for all of the commands if ARG is | |
385 | not present. */ | |
386 | com_help (arg) | |
387 | char *arg; | |
388 | { | |
389 | register int i; | |
390 | int printed = 0; | |
391 | ||
392 | for (i = 0; commands[i].name; i++) | |
393 | { | |
394 | if (!*arg || (strcmp (arg, commands[i].name) == 0)) | |
395 | { | |
396 | printf ("%s\t\t%s.\n", commands[i].name, commands[i].doc); | |
397 | printed++; | |
398 | } | |
399 | } | |
400 | ||
401 | if (!printed) | |
402 | { | |
403 | printf ("No commands match `%s'. Possibilties are:\n", arg); | |
404 | ||
405 | for (i = 0; commands[i].name; i++) | |
406 | { | |
407 | /* Print in six columns. */ | |
408 | if (printed == 6) | |
409 | { | |
410 | printed = 0; | |
411 | printf ("\n"); | |
412 | } | |
413 | ||
414 | printf ("%s\t", commands[i].name); | |
415 | printed++; | |
416 | } | |
417 | ||
418 | if (printed) | |
419 | printf ("\n"); | |
420 | } | |
421 | return (0); | |
422 | } | |
423 | ||
424 | /* Change to the directory ARG. */ | |
425 | com_cd (arg) | |
426 | char *arg; | |
427 | { | |
428 | if (chdir (arg) == -1) | |
429 | { | |
430 | perror (arg); | |
431 | return 1; | |
432 | } | |
433 | ||
434 | com_pwd (""); | |
435 | return (0); | |
436 | } | |
437 | ||
438 | /* Print out the current working directory. */ | |
439 | com_pwd (ignore) | |
440 | char *ignore; | |
441 | { | |
442 | char dir[1024], *s; | |
443 | ||
1b17e766 | 444 | s = getcwd (dir, sizeof(dir) - 1); |
d60d9f65 SS |
445 | if (s == 0) |
446 | { | |
447 | printf ("Error getting pwd: %s\n", dir); | |
448 | return 1; | |
449 | } | |
450 | ||
451 | printf ("Current directory is %s\n", dir); | |
452 | return 0; | |
453 | } | |
454 | ||
455 | /* The user wishes to quit using this program. Just set DONE non-zero. */ | |
456 | com_quit (arg) | |
457 | char *arg; | |
458 | { | |
459 | done = 1; | |
460 | return (0); | |
461 | } | |
462 | ||
463 | /* Function which tells you that you can't do this. */ | |
464 | too_dangerous (caller) | |
465 | char *caller; | |
466 | { | |
467 | fprintf (stderr, | |
468 | "%s: Too dangerous for me to distribute. Write it yourself.\n", | |
469 | caller); | |
470 | } | |
471 | ||
472 | /* Return non-zero if ARG is a valid argument for CALLER, else print | |
473 | an error message and return zero. */ | |
474 | int | |
475 | valid_argument (caller, arg) | |
476 | char *caller, *arg; | |
477 | { | |
478 | if (!arg || !*arg) | |
479 | { | |
480 | fprintf (stderr, "%s: Argument required.\n", caller); | |
481 | return (0); | |
482 | } | |
483 | ||
484 | return (1); | |
485 | } |