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Commit | Line | Data |
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726f6388 JA |
1 | /* fileman.c -- A tiny application which demonstrates how to use the |
2 | GNU Readline library. This application interactively allows users | |
3 | to manipulate files and their modes. */ | |
d166f048 JA |
4 | |
5 | #ifdef HAVE_CONFIG_H | |
bb70624e | 6 | # include <config.h> |
d166f048 | 7 | #endif |
726f6388 | 8 | |
726f6388 | 9 | #include <sys/types.h> |
d166f048 | 10 | #ifdef HAVE_SYS_FILE_H |
bb70624e | 11 | # include <sys/file.h> |
d166f048 | 12 | #endif |
726f6388 | 13 | #include <sys/stat.h> |
726f6388 | 14 | |
bb70624e JA |
15 | #ifdef HAVE_UNISTD_H |
16 | # include <unistd.h> | |
17 | #endif | |
18 | ||
19 | #include <fcntl.h> | |
d166f048 JA |
20 | #include <stdio.h> |
21 | #include <errno.h> | |
22 | ||
23 | #if defined (HAVE_STRING_H) | |
24 | # include <string.h> | |
25 | #else /* !HAVE_STRING_H */ | |
26 | # include <strings.h> | |
27 | #endif /* !HAVE_STRING_H */ | |
28 | ||
bb70624e JA |
29 | #ifdef HAVE_STDLIB_H |
30 | # include <stdlib.h> | |
31 | #endif | |
32 | ||
d166f048 JA |
33 | #ifdef READLINE_LIBRARY |
34 | # include "readline.h" | |
35 | # include "history.h" | |
36 | #else | |
37 | # include <readline/readline.h> | |
38 | # include <readline/history.h> | |
39 | #endif | |
726f6388 | 40 | |
726f6388 JA |
41 | extern char *xmalloc (); |
42 | ||
43 | /* The names of functions that actually do the manipulation. */ | |
28ef6c31 JA |
44 | int com_list __P((char *)); |
45 | int com_view __P((char *)); | |
46 | int com_rename __P((char *)); | |
47 | int com_stat __P((char *)); | |
48 | int com_pwd __P((char *)); | |
49 | int com_delete __P((char *)); | |
50 | int com_help __P((char *)); | |
51 | int com_cd __P((char *)); | |
52 | int com_quit __P((char *)); | |
726f6388 JA |
53 | |
54 | /* A structure which contains information on the commands this program | |
55 | can understand. */ | |
56 | ||
57 | typedef struct { | |
58 | char *name; /* User printable name of the function. */ | |
28ef6c31 | 59 | rl_icpfunc_t *func; /* Function to call to do the job. */ |
726f6388 JA |
60 | char *doc; /* Documentation for this function. */ |
61 | } COMMAND; | |
62 | ||
63 | COMMAND commands[] = { | |
64 | { "cd", com_cd, "Change to directory DIR" }, | |
65 | { "delete", com_delete, "Delete FILE" }, | |
66 | { "help", com_help, "Display this text" }, | |
67 | { "?", com_help, "Synonym for `help'" }, | |
68 | { "list", com_list, "List files in DIR" }, | |
69 | { "ls", com_list, "Synonym for `list'" }, | |
70 | { "pwd", com_pwd, "Print the current working directory" }, | |
71 | { "quit", com_quit, "Quit using Fileman" }, | |
72 | { "rename", com_rename, "Rename FILE to NEWNAME" }, | |
73 | { "stat", com_stat, "Print out statistics on FILE" }, | |
74 | { "view", com_view, "View the contents of FILE" }, | |
28ef6c31 | 75 | { (char *)NULL, (rl_icpfunc_t *)NULL, (char *)NULL } |
726f6388 JA |
76 | }; |
77 | ||
78 | /* Forward declarations. */ | |
79 | char *stripwhite (); | |
80 | COMMAND *find_command (); | |
81 | ||
82 | /* The name of this program, as taken from argv[0]. */ | |
83 | char *progname; | |
84 | ||
85 | /* When non-zero, this global means the user is done using this program. */ | |
86 | int done; | |
87 | ||
88 | char * | |
89 | dupstr (s) | |
d166f048 | 90 | char *s; |
726f6388 JA |
91 | { |
92 | char *r; | |
93 | ||
94 | r = xmalloc (strlen (s) + 1); | |
95 | strcpy (r, s); | |
96 | return (r); | |
97 | } | |
98 | ||
99 | main (argc, argv) | |
100 | int argc; | |
101 | char **argv; | |
102 | { | |
103 | char *line, *s; | |
104 | ||
105 | progname = argv[0]; | |
106 | ||
107 | initialize_readline (); /* Bind our completer. */ | |
108 | ||
109 | /* Loop reading and executing lines until the user quits. */ | |
110 | for ( ; done == 0; ) | |
111 | { | |
112 | line = readline ("FileMan: "); | |
113 | ||
114 | if (!line) | |
115 | break; | |
116 | ||
117 | /* Remove leading and trailing whitespace from the line. | |
118 | Then, if there is anything left, add it to the history list | |
119 | and execute it. */ | |
120 | s = stripwhite (line); | |
121 | ||
122 | if (*s) | |
123 | { | |
124 | add_history (s); | |
125 | execute_line (s); | |
126 | } | |
127 | ||
128 | free (line); | |
129 | } | |
130 | exit (0); | |
131 | } | |
132 | ||
133 | /* Execute a command line. */ | |
134 | int | |
135 | execute_line (line) | |
136 | char *line; | |
137 | { | |
138 | register int i; | |
139 | COMMAND *command; | |
140 | char *word; | |
141 | ||
142 | /* Isolate the command word. */ | |
143 | i = 0; | |
144 | while (line[i] && whitespace (line[i])) | |
145 | i++; | |
146 | word = line + i; | |
147 | ||
148 | while (line[i] && !whitespace (line[i])) | |
149 | i++; | |
150 | ||
151 | if (line[i]) | |
152 | line[i++] = '\0'; | |
153 | ||
154 | command = find_command (word); | |
155 | ||
156 | if (!command) | |
157 | { | |
158 | fprintf (stderr, "%s: No such command for FileMan.\n", word); | |
159 | return (-1); | |
160 | } | |
161 | ||
162 | /* Get argument to command, if any. */ | |
163 | while (whitespace (line[i])) | |
164 | i++; | |
165 | ||
166 | word = line + i; | |
167 | ||
168 | /* Call the function. */ | |
169 | return ((*(command->func)) (word)); | |
170 | } | |
171 | ||
172 | /* Look up NAME as the name of a command, and return a pointer to that | |
173 | command. Return a NULL pointer if NAME isn't a command name. */ | |
174 | COMMAND * | |
175 | find_command (name) | |
176 | char *name; | |
177 | { | |
178 | register int i; | |
179 | ||
180 | for (i = 0; commands[i].name; i++) | |
181 | if (strcmp (name, commands[i].name) == 0) | |
182 | return (&commands[i]); | |
183 | ||
184 | return ((COMMAND *)NULL); | |
185 | } | |
186 | ||
187 | /* Strip whitespace from the start and end of STRING. Return a pointer | |
188 | into STRING. */ | |
189 | char * | |
190 | stripwhite (string) | |
191 | char *string; | |
192 | { | |
193 | register char *s, *t; | |
194 | ||
195 | for (s = string; whitespace (*s); s++) | |
196 | ; | |
197 | ||
198 | if (*s == 0) | |
199 | return (s); | |
200 | ||
201 | t = s + strlen (s) - 1; | |
202 | while (t > s && whitespace (*t)) | |
203 | t--; | |
204 | *++t = '\0'; | |
205 | ||
206 | return s; | |
207 | } | |
208 | ||
209 | /* **************************************************************** */ | |
210 | /* */ | |
211 | /* Interface to Readline Completion */ | |
212 | /* */ | |
213 | /* **************************************************************** */ | |
214 | ||
28ef6c31 JA |
215 | char *command_generator __P((const char *, int)); |
216 | char **fileman_completion __P((const char *, int, int)); | |
726f6388 JA |
217 | |
218 | /* Tell the GNU Readline library how to complete. We want to try to complete | |
219 | on command names if this is the first word in the line, or on filenames | |
220 | if not. */ | |
221 | initialize_readline () | |
222 | { | |
223 | /* Allow conditional parsing of the ~/.inputrc file. */ | |
224 | rl_readline_name = "FileMan"; | |
225 | ||
226 | /* Tell the completer that we want a crack first. */ | |
28ef6c31 | 227 | rl_attempted_completion_function = fileman_completion; |
726f6388 JA |
228 | } |
229 | ||
ccc6cda3 JA |
230 | /* Attempt to complete on the contents of TEXT. START and END bound the |
231 | region of rl_line_buffer that contains the word to complete. TEXT is | |
232 | the word to complete. We can use the entire contents of rl_line_buffer | |
233 | in case we want to do some simple parsing. Return the array of matches, | |
234 | or NULL if there aren't any. */ | |
726f6388 JA |
235 | char ** |
236 | fileman_completion (text, start, end) | |
28ef6c31 | 237 | const char *text; |
726f6388 JA |
238 | int start, end; |
239 | { | |
240 | char **matches; | |
241 | ||
242 | matches = (char **)NULL; | |
243 | ||
244 | /* If this word is at the start of the line, then it is a command | |
245 | to complete. Otherwise it is the name of a file in the current | |
246 | directory. */ | |
247 | if (start == 0) | |
28ef6c31 | 248 | matches = rl_completion_matches (text, command_generator); |
726f6388 JA |
249 | |
250 | return (matches); | |
251 | } | |
252 | ||
253 | /* Generator function for command completion. STATE lets us know whether | |
254 | to start from scratch; without any state (i.e. STATE == 0), then we | |
255 | start at the top of the list. */ | |
256 | char * | |
257 | command_generator (text, state) | |
28ef6c31 | 258 | const char *text; |
726f6388 JA |
259 | int state; |
260 | { | |
261 | static int list_index, len; | |
262 | char *name; | |
263 | ||
264 | /* If this is a new word to complete, initialize now. This includes | |
265 | saving the length of TEXT for efficiency, and initializing the index | |
266 | variable to 0. */ | |
267 | if (!state) | |
268 | { | |
269 | list_index = 0; | |
270 | len = strlen (text); | |
271 | } | |
272 | ||
273 | /* Return the next name which partially matches from the command list. */ | |
274 | while (name = commands[list_index].name) | |
275 | { | |
276 | list_index++; | |
277 | ||
278 | if (strncmp (name, text, len) == 0) | |
279 | return (dupstr(name)); | |
280 | } | |
281 | ||
282 | /* If no names matched, then return NULL. */ | |
283 | return ((char *)NULL); | |
284 | } | |
285 | ||
286 | /* **************************************************************** */ | |
287 | /* */ | |
288 | /* FileMan Commands */ | |
289 | /* */ | |
290 | /* **************************************************************** */ | |
291 | ||
292 | /* String to pass to system (). This is for the LIST, VIEW and RENAME | |
293 | commands. */ | |
294 | static char syscom[1024]; | |
295 | ||
296 | /* List the file(s) named in arg. */ | |
297 | com_list (arg) | |
298 | char *arg; | |
299 | { | |
300 | if (!arg) | |
301 | arg = ""; | |
302 | ||
303 | sprintf (syscom, "ls -FClg %s", arg); | |
304 | return (system (syscom)); | |
305 | } | |
306 | ||
307 | com_view (arg) | |
308 | char *arg; | |
309 | { | |
310 | if (!valid_argument ("view", arg)) | |
311 | return 1; | |
312 | ||
bb70624e JA |
313 | #if defined (__MSDOS__) |
314 | /* more.com doesn't grok slashes in pathnames */ | |
315 | sprintf (syscom, "less %s", arg); | |
316 | #else | |
726f6388 | 317 | sprintf (syscom, "more %s", arg); |
bb70624e | 318 | #endif |
726f6388 JA |
319 | return (system (syscom)); |
320 | } | |
321 | ||
322 | com_rename (arg) | |
323 | char *arg; | |
324 | { | |
325 | too_dangerous ("rename"); | |
326 | return (1); | |
327 | } | |
328 | ||
329 | com_stat (arg) | |
330 | char *arg; | |
331 | { | |
332 | struct stat finfo; | |
333 | ||
334 | if (!valid_argument ("stat", arg)) | |
335 | return (1); | |
336 | ||
337 | if (stat (arg, &finfo) == -1) | |
338 | { | |
339 | perror (arg); | |
340 | return (1); | |
341 | } | |
342 | ||
343 | printf ("Statistics for `%s':\n", arg); | |
344 | ||
d166f048 JA |
345 | printf ("%s has %d link%s, and is %d byte%s in length.\n", |
346 | arg, | |
726f6388 JA |
347 | finfo.st_nlink, |
348 | (finfo.st_nlink == 1) ? "" : "s", | |
349 | finfo.st_size, | |
350 | (finfo.st_size == 1) ? "" : "s"); | |
351 | printf ("Inode Last Change at: %s", ctime (&finfo.st_ctime)); | |
352 | printf (" Last access at: %s", ctime (&finfo.st_atime)); | |
353 | printf (" Last modified at: %s", ctime (&finfo.st_mtime)); | |
354 | return (0); | |
355 | } | |
356 | ||
357 | com_delete (arg) | |
358 | char *arg; | |
359 | { | |
360 | too_dangerous ("delete"); | |
361 | return (1); | |
362 | } | |
363 | ||
364 | /* Print out help for ARG, or for all of the commands if ARG is | |
365 | not present. */ | |
366 | com_help (arg) | |
367 | char *arg; | |
368 | { | |
369 | register int i; | |
370 | int printed = 0; | |
371 | ||
372 | for (i = 0; commands[i].name; i++) | |
373 | { | |
374 | if (!*arg || (strcmp (arg, commands[i].name) == 0)) | |
375 | { | |
376 | printf ("%s\t\t%s.\n", commands[i].name, commands[i].doc); | |
377 | printed++; | |
378 | } | |
379 | } | |
380 | ||
381 | if (!printed) | |
382 | { | |
383 | printf ("No commands match `%s'. Possibilties are:\n", arg); | |
384 | ||
385 | for (i = 0; commands[i].name; i++) | |
386 | { | |
387 | /* Print in six columns. */ | |
388 | if (printed == 6) | |
389 | { | |
390 | printed = 0; | |
391 | printf ("\n"); | |
392 | } | |
393 | ||
394 | printf ("%s\t", commands[i].name); | |
395 | printed++; | |
396 | } | |
397 | ||
398 | if (printed) | |
399 | printf ("\n"); | |
400 | } | |
401 | return (0); | |
402 | } | |
403 | ||
404 | /* Change to the directory ARG. */ | |
405 | com_cd (arg) | |
406 | char *arg; | |
407 | { | |
408 | if (chdir (arg) == -1) | |
409 | { | |
410 | perror (arg); | |
411 | return 1; | |
412 | } | |
413 | ||
414 | com_pwd (""); | |
415 | return (0); | |
416 | } | |
417 | ||
418 | /* Print out the current working directory. */ | |
419 | com_pwd (ignore) | |
420 | char *ignore; | |
421 | { | |
422 | char dir[1024], *s; | |
423 | ||
bb70624e | 424 | s = getcwd (dir, sizeof(dir) - 1); |
726f6388 JA |
425 | if (s == 0) |
426 | { | |
427 | printf ("Error getting pwd: %s\n", dir); | |
428 | return 1; | |
429 | } | |
430 | ||
431 | printf ("Current directory is %s\n", dir); | |
432 | return 0; | |
433 | } | |
434 | ||
435 | /* The user wishes to quit using this program. Just set DONE non-zero. */ | |
436 | com_quit (arg) | |
437 | char *arg; | |
438 | { | |
439 | done = 1; | |
440 | return (0); | |
441 | } | |
442 | ||
443 | /* Function which tells you that you can't do this. */ | |
444 | too_dangerous (caller) | |
445 | char *caller; | |
446 | { | |
447 | fprintf (stderr, | |
448 | "%s: Too dangerous for me to distribute. Write it yourself.\n", | |
449 | caller); | |
450 | } | |
451 | ||
452 | /* Return non-zero if ARG is a valid argument for CALLER, else print | |
453 | an error message and return zero. */ | |
454 | int | |
455 | valid_argument (caller, arg) | |
456 | char *caller, *arg; | |
457 | { | |
458 | if (!arg || !*arg) | |
459 | { | |
460 | fprintf (stderr, "%s: Argument required.\n", caller); | |
461 | return (0); | |
462 | } | |
463 | ||
464 | return (1); | |
465 | } |