1 |
|
|
/* |
2 |
|
|
* Copyright (C) 1984-2012 Mark Nudelman |
3 |
|
|
* Modified for use with illumos by Garrett D'Amore. |
4 |
|
|
* Copyright 2014 Garrett D'Amore <garrett@damore.org> |
5 |
|
|
* |
6 |
|
|
* You may distribute under the terms of either the GNU General Public |
7 |
|
|
* License or the Less License, as specified in the README file. |
8 |
|
|
* |
9 |
|
|
* For more information, see the README file. |
10 |
|
|
*/ |
11 |
|
|
|
12 |
|
|
/* |
13 |
|
|
* Entry point, initialization, miscellaneous routines. |
14 |
|
|
*/ |
15 |
|
|
|
16 |
|
|
#include <sys/types.h> |
17 |
|
|
|
18 |
|
|
#include <libgen.h> |
19 |
|
|
#include <stdarg.h> |
20 |
|
|
|
21 |
|
|
#include "less.h" |
22 |
|
|
|
23 |
|
|
char *every_first_cmd = NULL; |
24 |
|
|
int new_file; |
25 |
|
|
int is_tty; |
26 |
|
|
IFILE curr_ifile = NULL; |
27 |
|
|
IFILE old_ifile = NULL; |
28 |
|
|
struct scrpos initial_scrpos; |
29 |
|
|
int any_display = FALSE; |
30 |
|
|
off_t start_attnpos = -1; |
31 |
|
|
off_t end_attnpos = -1; |
32 |
|
|
int wscroll; |
33 |
|
|
|
34 |
|
|
static char *progname; |
35 |
|
|
|
36 |
|
|
int quitting; |
37 |
|
|
int secure; |
38 |
|
|
int dohelp; |
39 |
|
|
|
40 |
|
|
int logfile = -1; |
41 |
|
|
int force_logfile = FALSE; |
42 |
|
|
char *namelogfile = NULL; |
43 |
|
|
char *editor; |
44 |
|
|
char *editproto; |
45 |
|
|
|
46 |
|
|
extern char *tags; |
47 |
|
|
extern char *tagoption; |
48 |
|
|
extern int jump_sline; |
49 |
|
|
extern int less_is_more; |
50 |
|
|
extern int missing_cap; |
51 |
|
|
extern int know_dumb; |
52 |
|
|
extern int quit_if_one_screen; |
53 |
|
|
extern int quit_at_eof; |
54 |
|
|
extern int pr_type; |
55 |
|
|
extern int hilite_search; |
56 |
|
|
extern int use_lessopen; |
57 |
|
|
extern int no_init; |
58 |
|
|
extern int top_scroll; |
59 |
|
|
extern int errmsgs; |
60 |
|
|
|
61 |
|
|
|
62 |
|
|
/* |
63 |
|
|
* Entry point. |
64 |
|
|
*/ |
65 |
|
|
int |
66 |
|
|
main(int argc, char *argv[]) |
67 |
|
|
{ |
68 |
|
|
IFILE ifile; |
69 |
|
|
char *s; |
70 |
|
|
|
71 |
|
16 |
progname = basename(argv[0]); |
72 |
|
8 |
argv++; |
73 |
|
8 |
argc--; |
74 |
|
|
|
75 |
|
|
/* |
76 |
|
|
* If the name of the executable program is "more", |
77 |
|
|
* act like LESS_IS_MORE is set. We have to set this as early |
78 |
|
|
* as possible for POSIX. |
79 |
|
|
*/ |
80 |
✗✓ |
8 |
if (strcmp(progname, "more") == 0) |
81 |
|
|
less_is_more = 1; |
82 |
|
|
else { |
83 |
|
8 |
s = lgetenv("LESS_IS_MORE"); |
84 |
✗✓✗✗
|
8 |
if (s != NULL && *s != '\0') |
85 |
|
|
less_is_more = 1; |
86 |
|
|
} |
87 |
|
|
|
88 |
|
8 |
secure = 0; |
89 |
|
8 |
s = lgetenv("LESSSECURE"); |
90 |
✗✓✗✗
|
8 |
if (s != NULL && *s != '\0') |
91 |
|
|
secure = 1; |
92 |
|
|
|
93 |
✗✓ |
8 |
if (secure) { |
94 |
|
|
if (pledge("stdio rpath wpath tty flock cpath", NULL) == -1) { |
95 |
|
|
perror("pledge"); |
96 |
|
|
exit(1); |
97 |
|
|
} |
98 |
|
|
} else { |
99 |
✗✓ |
8 |
if (pledge("stdio rpath wpath cpath fattr proc exec tty flock", NULL) == -1) { |
100 |
|
|
perror("pledge"); |
101 |
|
|
exit(1); |
102 |
|
|
} |
103 |
|
|
} |
104 |
|
|
|
105 |
|
|
/* |
106 |
|
|
* Process command line arguments and LESS environment arguments. |
107 |
|
|
* Command line arguments override environment arguments. |
108 |
|
|
*/ |
109 |
|
8 |
is_tty = isatty(1); |
110 |
|
8 |
get_term(); |
111 |
|
8 |
init_cmds(); |
112 |
|
8 |
init_charset(); |
113 |
|
8 |
init_line(); |
114 |
|
8 |
init_cmdhist(); |
115 |
|
8 |
init_option(); |
116 |
|
8 |
init_search(); |
117 |
|
|
|
118 |
|
|
|
119 |
|
8 |
init_prompt(); |
120 |
|
|
|
121 |
✗✓ |
8 |
if (less_is_more) { |
122 |
|
|
/* this is specified by XPG */ |
123 |
|
|
quit_at_eof = OPT_ON; |
124 |
|
|
|
125 |
|
|
/* more users don't like the warning */ |
126 |
|
|
know_dumb = OPT_ON; |
127 |
|
|
|
128 |
|
|
/* default prompt is medium */ |
129 |
|
|
pr_type = OPT_ON; |
130 |
|
|
|
131 |
|
|
/* do not hilight search terms */ |
132 |
|
|
hilite_search = OPT_OFF; |
133 |
|
|
|
134 |
|
|
/* do not use LESSOPEN */ |
135 |
|
|
use_lessopen = OPT_OFF; |
136 |
|
|
|
137 |
|
|
/* do not set init strings to terminal */ |
138 |
|
|
no_init = OPT_ON; |
139 |
|
|
|
140 |
|
|
/* repaint from top of screen */ |
141 |
|
|
top_scroll = OPT_OFF; |
142 |
|
|
} |
143 |
|
|
|
144 |
|
8 |
s = lgetenv(less_is_more ? "MORE" : "LESS"); |
145 |
✗✓ |
8 |
if (s != NULL) |
146 |
|
|
scan_option(estrdup(s)); |
147 |
|
|
|
148 |
|
|
#define isoptstring(s) (((s)[0] == '-' || (s)[0] == '+') && (s)[1] != '\0') |
149 |
✓✗✓✗
✗✓✗✗
✗✓ |
40 |
while (argc > 0 && (isoptstring(*argv) || isoptpending())) { |
150 |
|
|
s = *argv++; |
151 |
|
|
argc--; |
152 |
|
|
if (strcmp(s, "--") == 0) |
153 |
|
|
break; |
154 |
|
|
scan_option(s); |
155 |
|
|
} |
156 |
|
|
#undef isoptstring |
157 |
|
|
|
158 |
✗✓ |
8 |
if (isoptpending()) { |
159 |
|
|
/* |
160 |
|
|
* Last command line option was a flag requiring a |
161 |
|
|
* following string, but there was no following string. |
162 |
|
|
*/ |
163 |
|
|
nopendopt(); |
164 |
|
|
quit(QUIT_OK); |
165 |
|
|
} |
166 |
|
|
|
167 |
✗✓ |
8 |
if (errmsgs) { |
168 |
|
|
quit(QUIT_ERROR); |
169 |
|
|
} |
170 |
✗✓ |
8 |
if (less_is_more && quit_at_eof == OPT_ONPLUS) { |
171 |
|
|
extern int no_init; |
172 |
|
|
no_init = OPT_ON; |
173 |
|
|
} |
174 |
✗✓ |
8 |
if (less_is_more && pr_type == OPT_ONPLUS) { |
175 |
|
|
extern int quiet; |
176 |
|
|
quiet = VERY_QUIET; |
177 |
|
|
} |
178 |
|
|
|
179 |
|
8 |
editor = lgetenv("VISUAL"); |
180 |
✗✓✗✗
|
8 |
if (editor == NULL || *editor == '\0') { |
181 |
|
8 |
editor = lgetenv("EDITOR"); |
182 |
✗✓✗✗
|
8 |
if (editor == NULL || *editor == '\0') |
183 |
|
8 |
editor = EDIT_PGM; |
184 |
|
|
} |
185 |
|
8 |
editproto = lgetenv("LESSEDIT"); |
186 |
✗✓✗✗
|
8 |
if (editproto == NULL || *editproto == '\0') |
187 |
|
8 |
editproto = "%E ?lm+%lm. %f"; |
188 |
|
|
|
189 |
|
|
/* |
190 |
|
|
* Call get_ifile with all the command line filenames |
191 |
|
|
* to "register" them with the ifile system. |
192 |
|
|
*/ |
193 |
|
|
ifile = NULL; |
194 |
✗✓ |
8 |
if (dohelp) |
195 |
|
|
ifile = get_ifile(helpfile(), ifile); |
196 |
✓✓ |
32 |
while (argc-- > 0) { |
197 |
|
|
char *filename; |
198 |
|
8 |
filename = shell_quote(*argv); |
199 |
✗✓ |
8 |
if (filename == NULL) |
200 |
|
|
filename = *argv; |
201 |
|
8 |
argv++; |
202 |
|
8 |
(void) get_ifile(filename, ifile); |
203 |
|
8 |
ifile = prev_ifile(NULL); |
204 |
|
8 |
free(filename); |
205 |
|
|
} |
206 |
|
|
/* |
207 |
|
|
* Set up terminal, etc. |
208 |
|
|
*/ |
209 |
✗✓ |
8 |
if (!is_tty) { |
210 |
|
|
/* |
211 |
|
|
* Output is not a tty. |
212 |
|
|
* Just copy the input file(s) to output. |
213 |
|
|
*/ |
214 |
|
|
if (nifile() == 0) { |
215 |
|
|
if (edit_stdin() == 0) |
216 |
|
|
cat_file(); |
217 |
|
|
} else if (edit_first() == 0) { |
218 |
|
|
do { |
219 |
|
|
cat_file(); |
220 |
|
|
} while (edit_next(1) == 0); |
221 |
|
|
} |
222 |
|
|
quit(QUIT_OK); |
223 |
|
|
} |
224 |
|
|
|
225 |
✗✓ |
8 |
if (missing_cap && !know_dumb) |
226 |
|
|
error("WARNING: terminal is not fully functional", NULL); |
227 |
|
8 |
init_mark(); |
228 |
|
8 |
open_getchr(); |
229 |
|
|
|
230 |
✗✓ |
8 |
if (secure) |
231 |
|
|
if (pledge("stdio rpath tty flock cpath wpath", NULL) == -1) { |
232 |
|
|
perror("pledge"); |
233 |
|
|
exit(1); |
234 |
|
|
} |
235 |
|
|
|
236 |
|
8 |
raw_mode(1); |
237 |
|
8 |
init_signals(1); |
238 |
|
|
|
239 |
|
|
/* |
240 |
|
|
* Select the first file to examine. |
241 |
|
|
*/ |
242 |
✓✗✗✓
|
16 |
if (tagoption != NULL || strcmp(tags, "-") == 0) { |
243 |
|
|
/* |
244 |
|
|
* A -t option was given. |
245 |
|
|
* Verify that no filenames were also given. |
246 |
|
|
* Edit the file selected by the "tags" search, |
247 |
|
|
* and search for the proper line in the file. |
248 |
|
|
*/ |
249 |
|
|
if (nifile() > 0) { |
250 |
|
|
error("No filenames allowed with -t option", NULL); |
251 |
|
|
quit(QUIT_ERROR); |
252 |
|
|
} |
253 |
|
|
findtag(tagoption); |
254 |
|
|
if (edit_tagfile()) /* Edit file which contains the tag */ |
255 |
|
|
quit(QUIT_ERROR); |
256 |
|
|
/* |
257 |
|
|
* Search for the line which contains the tag. |
258 |
|
|
* Set up initial_scrpos so we display that line. |
259 |
|
|
*/ |
260 |
|
|
initial_scrpos.pos = tagsearch(); |
261 |
|
|
if (initial_scrpos.pos == -1) |
262 |
|
|
quit(QUIT_ERROR); |
263 |
|
|
initial_scrpos.ln = jump_sline; |
264 |
✗✓ |
8 |
} else if (nifile() == 0) { |
265 |
|
|
if (edit_stdin()) /* Edit standard input */ |
266 |
|
|
quit(QUIT_ERROR); |
267 |
|
|
} else { |
268 |
✗✓ |
8 |
if (edit_first()) /* Edit first valid file in cmd line */ |
269 |
|
|
quit(QUIT_ERROR); |
270 |
|
|
} |
271 |
|
|
|
272 |
|
8 |
init(); |
273 |
|
8 |
commands(); |
274 |
|
8 |
quit(QUIT_OK); |
275 |
|
8 |
return (0); |
276 |
|
|
} |
277 |
|
|
|
278 |
|
|
/* |
279 |
|
|
* Allocate memory. |
280 |
|
|
* Like calloc(), but never returns an error (NULL). |
281 |
|
|
*/ |
282 |
|
|
void * |
283 |
|
|
ecalloc(int count, unsigned int size) |
284 |
|
|
{ |
285 |
|
|
void *p; |
286 |
|
|
|
287 |
|
40250 |
p = calloc(count, size); |
288 |
✓✗ |
20125 |
if (p != NULL) |
289 |
|
20125 |
return (p); |
290 |
|
|
error("Cannot allocate memory", NULL); |
291 |
|
|
quit(QUIT_ERROR); |
292 |
|
|
return (NULL); |
293 |
|
20125 |
} |
294 |
|
|
|
295 |
|
|
char * |
296 |
|
|
easprintf(const char *fmt, ...) |
297 |
|
|
{ |
298 |
|
16 |
char *p = NULL; |
299 |
|
|
int rv; |
300 |
|
8 |
va_list ap; |
301 |
|
|
|
302 |
|
8 |
va_start(ap, fmt); |
303 |
|
8 |
rv = vasprintf(&p, fmt, ap); |
304 |
|
8 |
va_end(ap); |
305 |
|
|
|
306 |
✗✓ |
8 |
if (p == NULL || rv < 0) { |
307 |
|
|
error("Cannot allocate memory", NULL); |
308 |
|
|
quit(QUIT_ERROR); |
309 |
|
|
} |
310 |
|
16 |
return (p); |
311 |
|
8 |
} |
312 |
|
|
|
313 |
|
|
char * |
314 |
|
|
estrdup(const char *str) |
315 |
|
|
{ |
316 |
|
|
char *n; |
317 |
|
|
|
318 |
|
204 |
n = strdup(str); |
319 |
✗✓ |
102 |
if (n == NULL) { |
320 |
|
|
error("Cannot allocate memory", NULL); |
321 |
|
|
quit(QUIT_ERROR); |
322 |
|
|
} |
323 |
|
102 |
return (n); |
324 |
|
|
} |
325 |
|
|
|
326 |
|
|
/* |
327 |
|
|
* Skip leading spaces in a string. |
328 |
|
|
*/ |
329 |
|
|
char * |
330 |
|
|
skipsp(char *s) |
331 |
|
|
{ |
332 |
|
|
while (*s == ' ' || *s == '\t') |
333 |
|
|
s++; |
334 |
|
|
return (s); |
335 |
|
|
} |
336 |
|
|
|
337 |
|
|
/* |
338 |
|
|
* See how many characters of two strings are identical. |
339 |
|
|
* If uppercase is true, the first string must begin with an uppercase |
340 |
|
|
* character; the remainder of the first string may be either case. |
341 |
|
|
*/ |
342 |
|
|
int |
343 |
|
|
sprefix(char *ps, char *s, int uppercase) |
344 |
|
|
{ |
345 |
|
|
int c; |
346 |
|
|
int sc; |
347 |
|
|
int len = 0; |
348 |
|
|
|
349 |
|
|
for (; *s != '\0'; s++, ps++) { |
350 |
|
|
c = *ps; |
351 |
|
|
if (uppercase) { |
352 |
|
|
if (len == 0 && islower(c)) |
353 |
|
|
return (-1); |
354 |
|
|
c = tolower(c); |
355 |
|
|
} |
356 |
|
|
sc = *s; |
357 |
|
|
if (len > 0) |
358 |
|
|
sc = tolower(sc); |
359 |
|
|
if (c != sc) |
360 |
|
|
break; |
361 |
|
|
len++; |
362 |
|
|
} |
363 |
|
|
return (len); |
364 |
|
|
} |
365 |
|
|
|
366 |
|
|
/* |
367 |
|
|
* Exit the program. |
368 |
|
|
*/ |
369 |
|
|
void |
370 |
|
|
quit(int status) |
371 |
|
|
{ |
372 |
|
|
static int save_status; |
373 |
|
|
|
374 |
|
|
/* |
375 |
|
|
* Put cursor at bottom left corner, clear the line, |
376 |
|
|
* reset the terminal modes, and exit. |
377 |
|
|
*/ |
378 |
✗✓ |
16 |
if (status < 0) |
379 |
|
|
status = save_status; |
380 |
|
|
else |
381 |
|
8 |
save_status = status; |
382 |
|
8 |
quitting = 1; |
383 |
|
8 |
edit(NULL); |
384 |
✓✗ |
8 |
if (!secure) |
385 |
|
8 |
save_cmdhist(); |
386 |
✓✗ |
8 |
if (any_display && is_tty) |
387 |
|
8 |
clear_bot(); |
388 |
|
|
deinit(); |
389 |
|
|
flush(1); |
390 |
|
|
raw_mode(0); |
391 |
|
|
exit(status); |
392 |
|
|
} |
393 |
|
|
|
394 |
|
|
char * |
395 |
|
|
helpfile(void) |
396 |
|
|
{ |
397 |
|
16 |
return (less_is_more ? HELPDIR "/more.help" : HELPDIR "/less.help"); |
398 |
|
|
} |