File: | src/usr.bin/mg/region.c |
Warning: | line 647, column 6 Although the value stored to 'q' is used in the enclosing expression, the value is never actually read from 'q' |
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1 | /* $OpenBSD: region.c,v 1.44 2023/03/28 14:47:28 op Exp $ */ |
2 | |
3 | /* This file is in the public domain. */ |
4 | |
5 | /* |
6 | * Region based commands. |
7 | * The routines in this file deal with the region, that magic space between |
8 | * "." and mark. Some functions are commands. Some functions are just for |
9 | * internal use. |
10 | */ |
11 | |
12 | #include <sys/queue.h> |
13 | #include <sys/socket.h> |
14 | #include <sys/types.h> |
15 | #include <sys/wait.h> |
16 | #include <errno(*__errno()).h> |
17 | #include <fcntl.h> |
18 | #include <paths.h> |
19 | #include <poll.h> |
20 | #include <signal.h> |
21 | #include <stdio.h> |
22 | #include <stdlib.h> |
23 | #include <string.h> |
24 | #include <unistd.h> |
25 | |
26 | #include "def.h" |
27 | |
28 | #define TIMEOUT10000 10000 |
29 | |
30 | static char leftover[BUFSIZ1024]; |
31 | |
32 | static int getregion(struct region *); |
33 | static int iomux(int, char * const, int, struct buffer *); |
34 | static int preadin(int, struct buffer *); |
35 | static void pwriteout(int, char **, int *); |
36 | static int setsize(struct region *, RSIZE); |
37 | static int shellcmdoutput(char * const, char * const, int); |
38 | |
39 | /* |
40 | * Kill the region. Ask "getregion" to figure out the bounds of the region. |
41 | * Move "." to the start, and kill the characters. Mark is cleared afterwards. |
42 | */ |
43 | int |
44 | killregion(int f, int n) |
45 | { |
46 | int s; |
47 | struct region region; |
48 | |
49 | if ((s = getregion(®ion)) != TRUE1) |
50 | return (s); |
51 | /* This is a kill-type command, so do magic kill buffer stuff. */ |
52 | if ((lastflag & CFKILL0x0002) == 0) |
53 | kdelete(); |
54 | thisflag |= CFKILL0x0002; |
55 | curwp->w_dotp = region.r_linep; |
56 | curwp->w_doto = region.r_offset; |
57 | curwp->w_dotline = region.r_lineno; |
58 | s = ldelete(region.r_size, KFORW0x01 | KREG0x04); |
59 | clearmark(FFARG7, 0); |
60 | |
61 | return (s); |
62 | } |
63 | |
64 | /* |
65 | * Copy all of the characters in the region to the kill buffer, |
66 | * clearing the mark afterwards. |
67 | * This is a bit like a kill region followed by a yank. |
68 | */ |
69 | int |
70 | copyregion(int f, int n) |
71 | { |
72 | struct line *linep; |
73 | struct region region; |
74 | int loffs; |
75 | int s; |
76 | |
77 | if ((s = getregion(®ion)) != TRUE1) |
78 | return (s); |
79 | |
80 | /* kill type command */ |
81 | if ((lastflag & CFKILL0x0002) == 0) |
82 | kdelete(); |
83 | thisflag |= CFKILL0x0002; |
84 | |
85 | /* current line */ |
86 | linep = region.r_linep; |
87 | |
88 | /* current offset */ |
89 | loffs = region.r_offset; |
90 | |
91 | while (region.r_size--) { |
92 | if (loffs == llength(linep)((linep)->l_used)) { /* End of line. */ |
93 | if ((s = kinsert(*curbp->b_nlchr, KFORW0x01)) != TRUE1) |
94 | return (s); |
95 | linep = lforw(linep)((linep)->l_fp); |
96 | loffs = 0; |
97 | } else { /* Middle of line. */ |
98 | if ((s = kinsert(lgetc(linep, loffs)(((unsigned char) ((linep)->l_text[(loffs)]))), KFORW0x01)) != TRUE1) |
99 | return (s); |
100 | ++loffs; |
101 | } |
102 | } |
103 | clearmark(FFARG7, 0); |
104 | |
105 | return (TRUE1); |
106 | } |
107 | |
108 | /* |
109 | * Lower case region. Zap all of the upper case characters in the region to |
110 | * lower case. Use the region code to set the limits. Scan the buffer, doing |
111 | * the changes. Call "lchange" to ensure that redisplay is done in all |
112 | * buffers. |
113 | */ |
114 | int |
115 | lowerregion(int f, int n) |
116 | { |
117 | struct line *linep; |
118 | struct region region; |
119 | int loffs, c, s; |
120 | |
121 | if ((s = checkdirty(curbp)) != TRUE1) |
122 | return (s); |
123 | if (curbp->b_flag & BFREADONLY0x10) { |
124 | dobeep(); |
125 | ewprintf("Buffer is read-only"); |
126 | return (FALSE0); |
127 | } |
128 | |
129 | if ((s = getregion(®ion)) != TRUE1) |
130 | return (s); |
131 | |
132 | undo_add_change(region.r_linep, region.r_offset, region.r_size); |
133 | |
134 | lchange(WFFULL0x08); |
135 | linep = region.r_linep; |
136 | loffs = region.r_offset; |
137 | while (region.r_size--) { |
138 | if (loffs == llength(linep)((linep)->l_used)) { |
139 | linep = lforw(linep)((linep)->l_fp); |
140 | loffs = 0; |
141 | } else { |
142 | c = lgetc(linep, loffs)(((unsigned char) ((linep)->l_text[(loffs)]))); |
143 | if (ISUPPER(c)((cinfo[((unsigned char) (c))]&0x02)!=0) != FALSE0) |
144 | lputc(linep, loffs, TOLOWER(c))((linep)->l_text[(loffs)]=(((c)+0x20))); |
145 | ++loffs; |
146 | } |
147 | } |
148 | return (TRUE1); |
149 | } |
150 | |
151 | /* |
152 | * Upper case region. Zap all of the lower case characters in the region to |
153 | * upper case. Use the region code to set the limits. Scan the buffer, |
154 | * doing the changes. Call "lchange" to ensure that redisplay is done in all |
155 | * buffers. |
156 | */ |
157 | int |
158 | upperregion(int f, int n) |
159 | { |
160 | struct line *linep; |
161 | struct region region; |
162 | int loffs, c, s; |
163 | |
164 | if ((s = checkdirty(curbp)) != TRUE1) |
165 | return (s); |
166 | if (curbp->b_flag & BFREADONLY0x10) { |
167 | dobeep(); |
168 | ewprintf("Buffer is read-only"); |
169 | return (FALSE0); |
170 | } |
171 | if ((s = getregion(®ion)) != TRUE1) |
172 | return (s); |
173 | |
174 | undo_add_change(region.r_linep, region.r_offset, region.r_size); |
175 | |
176 | lchange(WFFULL0x08); |
177 | linep = region.r_linep; |
178 | loffs = region.r_offset; |
179 | while (region.r_size--) { |
180 | if (loffs == llength(linep)((linep)->l_used)) { |
181 | linep = lforw(linep)((linep)->l_fp); |
182 | loffs = 0; |
183 | } else { |
184 | c = lgetc(linep, loffs)(((unsigned char) ((linep)->l_text[(loffs)]))); |
185 | if (ISLOWER(c)((cinfo[((unsigned char) (c))]&0x04)!=0) != FALSE0) |
186 | lputc(linep, loffs, TOUPPER(c))((linep)->l_text[(loffs)]=(((c)-0x20))); |
187 | ++loffs; |
188 | } |
189 | } |
190 | return (TRUE1); |
191 | } |
192 | |
193 | /* |
194 | * This routine figures out the bound of the region in the current window, |
195 | * and stores the results into the fields of the REGION structure. Dot and |
196 | * mark are usually close together, but I don't know the order, so I scan |
197 | * outward from dot, in both directions, looking for mark. The size is kept |
198 | * in a long. At the end, after the size is figured out, it is assigned to |
199 | * the size field of the region structure. If this assignment loses any bits, |
200 | * then we print an error. This is "type independent" overflow checking. All |
201 | * of the callers of this routine should be ready to get an ABORT status, |
202 | * because I might add a "if regions is big, ask before clobbering" flag. |
203 | */ |
204 | static int |
205 | getregion(struct region *rp) |
206 | { |
207 | struct line *flp, *blp; |
208 | long fsize, bsize; |
209 | |
210 | if (curwp->w_markp == NULL((void *)0)) { |
211 | dobeep(); |
212 | ewprintf("No mark set in this window"); |
213 | return (FALSE0); |
214 | } |
215 | |
216 | /* "r_size" always ok */ |
217 | if (curwp->w_dotp == curwp->w_markp) { |
218 | rp->r_linep = curwp->w_dotp; |
219 | rp->r_lineno = curwp->w_dotline; |
220 | if (curwp->w_doto < curwp->w_marko) { |
221 | rp->r_offset = curwp->w_doto; |
222 | rp->r_size = (RSIZE)(curwp->w_marko - curwp->w_doto); |
223 | } else { |
224 | rp->r_offset = curwp->w_marko; |
225 | rp->r_size = (RSIZE)(curwp->w_doto - curwp->w_marko); |
226 | } |
227 | return (TRUE1); |
228 | } |
229 | /* get region size */ |
230 | flp = blp = curwp->w_dotp; |
231 | bsize = curwp->w_doto; |
232 | fsize = llength(flp)((flp)->l_used) - curwp->w_doto + 1; |
233 | while (lforw(flp)((flp)->l_fp) != curbp->b_headp || lback(blp)((blp)->l_bp) != curbp->b_headp) { |
234 | if (lforw(flp)((flp)->l_fp) != curbp->b_headp) { |
235 | flp = lforw(flp)((flp)->l_fp); |
236 | if (flp == curwp->w_markp) { |
237 | rp->r_linep = curwp->w_dotp; |
238 | rp->r_offset = curwp->w_doto; |
239 | rp->r_lineno = curwp->w_dotline; |
240 | return (setsize(rp, |
241 | (RSIZE)(fsize + curwp->w_marko))); |
242 | } |
243 | fsize += llength(flp)((flp)->l_used) + 1; |
244 | } |
245 | if (lback(blp)((blp)->l_bp) != curbp->b_headp) { |
246 | blp = lback(blp)((blp)->l_bp); |
247 | bsize += llength(blp)((blp)->l_used) + 1; |
248 | if (blp == curwp->w_markp) { |
249 | rp->r_linep = blp; |
250 | rp->r_offset = curwp->w_marko; |
251 | rp->r_lineno = curwp->w_markline; |
252 | return (setsize(rp, |
253 | (RSIZE)(bsize - curwp->w_marko))); |
254 | } |
255 | } |
256 | } |
257 | dobeep(); |
258 | ewprintf("Bug: lost mark"); |
259 | return (FALSE0); |
260 | } |
261 | |
262 | /* |
263 | * Set size, and check for overflow. |
264 | */ |
265 | static int |
266 | setsize(struct region *rp, RSIZE size) |
267 | { |
268 | rp->r_size = size; |
269 | if (rp->r_size != size) { |
270 | dobeep(); |
271 | ewprintf("Region is too large"); |
272 | return (FALSE0); |
273 | } |
274 | return (TRUE1); |
275 | } |
276 | |
277 | #define PREFIXLENGTH40 40 |
278 | static char prefix_string[PREFIXLENGTH40] = {'>', '\0'}; |
279 | |
280 | /* |
281 | * Prefix the region with whatever is in prefix_string. Leaves dot at the |
282 | * beginning of the line after the end of the region. If an argument is |
283 | * given, prompts for the line prefix string. |
284 | */ |
285 | int |
286 | prefixregion(int f, int n) |
287 | { |
288 | struct line *first, *last; |
289 | struct region region; |
290 | char *prefix = prefix_string; |
291 | int nline; |
292 | int s; |
293 | |
294 | if ((s = checkdirty(curbp)) != TRUE1) |
295 | return (s); |
296 | if (curbp->b_flag & BFREADONLY0x10) { |
297 | dobeep(); |
298 | ewprintf("Buffer is read-only"); |
299 | return (FALSE0); |
300 | } |
301 | if ((f == TRUE1) && ((s = setprefix(FFRAND8, 1)) != TRUE1)) |
302 | return (s); |
303 | |
304 | /* get # of lines to affect */ |
305 | if ((s = getregion(®ion)) != TRUE1) |
306 | return (s); |
307 | first = region.r_linep; |
308 | last = (first == curwp->w_dotp) ? curwp->w_markp : curwp->w_dotp; |
309 | for (nline = 1; first != last; nline++) |
310 | first = lforw(first)((first)->l_fp); |
311 | |
312 | /* move to beginning of region */ |
313 | curwp->w_dotp = region.r_linep; |
314 | curwp->w_doto = region.r_offset; |
315 | curwp->w_dotline = region.r_lineno; |
316 | |
317 | /* for each line, go to beginning and insert the prefix string */ |
318 | while (nline--) { |
319 | (void)gotobol(FFRAND8, 1); |
320 | for (prefix = prefix_string; *prefix; prefix++) |
321 | (void)linsert(1, *prefix); |
322 | (void)forwline(FFRAND8, 1); |
323 | } |
324 | (void)gotobol(FFRAND8, 1); |
325 | return (TRUE1); |
326 | } |
327 | |
328 | /* |
329 | * Set line prefix string. Used by prefixregion. |
330 | */ |
331 | int |
332 | setprefix(int f, int n) |
333 | { |
334 | char buf[PREFIXLENGTH40], *rep; |
335 | int retval; |
336 | |
337 | if (prefix_string[0] == '\0') |
338 | rep = eread("Prefix string: ", buf, sizeof(buf), |
339 | EFNEW0x0008 | EFCR0x0010); |
340 | else |
341 | rep = eread("Prefix string (default %s): ", buf, sizeof(buf), |
342 | EFNUL0x0040 | EFNEW0x0008 | EFCR0x0010, prefix_string); |
343 | if (rep == NULL((void *)0)) |
344 | return (ABORT2); |
345 | if (rep[0] != '\0') { |
346 | (void)strlcpy(prefix_string, rep, sizeof(prefix_string)); |
347 | retval = TRUE1; |
348 | } else if (rep[0] == '\0' && prefix_string[0] != '\0') { |
349 | /* CR -- use old one */ |
350 | retval = TRUE1; |
351 | } else |
352 | retval = FALSE0; |
353 | return (retval); |
354 | } |
355 | |
356 | int |
357 | region_get_data(struct region *reg, char *buf, int len) |
358 | { |
359 | int i, off; |
360 | struct line *lp; |
361 | |
362 | off = reg->r_offset; |
363 | lp = reg->r_linep; |
364 | for (i = 0; i < len; i++) { |
365 | if (off == llength(lp)((lp)->l_used)) { |
366 | lp = lforw(lp)((lp)->l_fp); |
367 | if (lp == curbp->b_headp) |
368 | break; |
369 | off = 0; |
370 | buf[i] = *curbp->b_nlchr; |
371 | } else { |
372 | buf[i] = lgetc(lp, off)(((unsigned char) ((lp)->l_text[(off)]))); |
373 | off++; |
374 | } |
375 | } |
376 | buf[i] = '\0'; |
377 | return (i); |
378 | } |
379 | |
380 | void |
381 | region_put_data(const char *buf, int len) |
382 | { |
383 | int i; |
384 | |
385 | for (i = 0; buf[i] != '\0' && i < len; i++) { |
386 | if (buf[i] == *curbp->b_nlchr) |
387 | lnewline(); |
388 | else |
389 | linsert(1, buf[i]); |
390 | } |
391 | } |
392 | |
393 | /* |
394 | * Mark whole buffer by first traversing to end-of-buffer |
395 | * and then to beginning-of-buffer. Mark, dot are implicitly |
396 | * set to eob, bob respectively during traversal. |
397 | */ |
398 | int |
399 | markbuffer(int f, int n) |
400 | { |
401 | if (gotoeob(f,n) == FALSE0) |
402 | return (FALSE0); |
403 | (void) clearmark(f, n); |
404 | if (gotobob(f,n) == FALSE0) |
405 | return (FALSE0); |
406 | return (TRUE1); |
407 | } |
408 | |
409 | /* |
410 | * Pipe text from current region to external command. |
411 | */ |
412 | int |
413 | piperegion(int f, int n) |
414 | { |
415 | struct region region; |
416 | int len; |
417 | char *cmd, cmdbuf[NFILEN1024], *text; |
418 | |
419 | /* C-u M-| is not supported yet */ |
420 | if (n > 1) |
421 | return (ABORT2); |
422 | |
423 | if (curwp->w_markp == NULL((void *)0)) { |
424 | dobeep(); |
425 | ewprintf("The mark is not set now, so there is no region"); |
426 | return (FALSE0); |
427 | } |
428 | |
429 | if ((cmd = eread("Shell command on region: ", cmdbuf, sizeof(cmdbuf), |
430 | EFNEW0x0008 | EFCR0x0010)) == NULL((void *)0) || (cmd[0] == '\0')) |
431 | return (ABORT2); |
432 | |
433 | if (getregion(®ion) != TRUE1) |
434 | return (FALSE0); |
435 | |
436 | len = region.r_size; |
437 | |
438 | if ((text = malloc(len + 1)) == NULL((void *)0)) { |
439 | dobeep(); |
440 | ewprintf("Cannot allocate memory."); |
441 | return (FALSE0); |
442 | } |
443 | |
444 | region_get_data(®ion, text, len); |
445 | |
446 | return shellcmdoutput(cmd, text, len); |
447 | } |
448 | |
449 | /* |
450 | * Get command from mini-buffer and execute externally. |
451 | */ |
452 | int |
453 | shellcommand(int f, int n) |
454 | { |
455 | char *cmd, cmdbuf[NFILEN1024]; |
456 | |
457 | if (n > 1) |
458 | return (ABORT2); |
459 | |
460 | if ((cmd = eread("Shell command: ", cmdbuf, sizeof(cmdbuf), |
461 | EFNEW0x0008 | EFCR0x0010)) == NULL((void *)0) || (cmd[0] == '\0')) |
462 | return (ABORT2); |
463 | |
464 | return shellcmdoutput(cmd, NULL((void *)0), 0); |
465 | } |
466 | |
467 | int |
468 | shellcmdoutput(char* const cmd, char* const text, int len) |
469 | { |
470 | struct buffer *bp; |
471 | char *argv[] = {NULL((void *)0), "-c", cmd, NULL((void *)0)}; |
472 | char *shellp; |
473 | int ret; |
474 | |
475 | bp = bfind("*Shell Command Output*", TRUE1); |
476 | bp->b_flag |= BFREADONLY0x10; |
477 | if (bclear(bp) != TRUE1) { |
478 | free(text); |
479 | return (FALSE0); |
480 | } |
481 | |
482 | if ((shellp = getenv("SHELL")) == NULL((void *)0)) |
483 | shellp = _PATH_BSHELL"/bin/sh"; |
484 | |
485 | if ((argv[0] = strrchr(shellp, '/')) != NULL((void *)0)) |
486 | argv[0]++; |
487 | else |
488 | argv[0] = shellp; |
489 | |
490 | ret = pipeio(shellp, argv, text, len, bp); |
491 | |
492 | if (ret == TRUE1) { |
493 | eerase(); |
494 | if (lforw(bp->b_headp)((bp->b_headp)->l_fp) == bp->b_headp) |
495 | addline(bp, "(Shell command succeeded with no output)")addlinef(bp, "%s", "(Shell command succeeded with no output)" ); |
496 | } |
497 | |
498 | free(text); |
499 | return (ret); |
500 | } |
501 | |
502 | /* |
503 | * Create a socketpair, fork and execv path with argv. |
504 | * STDIN, STDOUT and STDERR of child process are redirected to socket. |
505 | * Parent writes len chars from text to socket. |
506 | */ |
507 | int |
508 | pipeio(const char* const path, char* const argv[], char* const text, int len, |
509 | struct buffer *outbp) |
510 | { |
511 | int s[2], ret; |
512 | char *err; |
513 | pid_t pid; |
514 | |
515 | if (socketpair(AF_UNIX1, SOCK_STREAM1, PF_UNSPEC0, s) == -1) { |
516 | dobeep(); |
517 | ewprintf("socketpair error"); |
518 | return (FALSE0); |
519 | } |
520 | |
521 | switch((pid = fork())) { |
522 | case -1: |
523 | dobeep(); |
524 | ewprintf("Can't fork"); |
525 | return (FALSE0); |
526 | case 0: |
527 | /* Child process */ |
528 | close(s[0]); |
529 | if (dup2(s[1], STDIN_FILENO0) == -1) |
530 | _exit(1); |
531 | if (dup2(s[1], STDOUT_FILENO1) == -1) |
532 | _exit(1); |
533 | if (dup2(s[1], STDERR_FILENO2) == -1) |
534 | _exit(1); |
535 | |
536 | execv(path, argv); |
537 | err = strerror(errno(*__errno())); |
538 | write(s[1], err, strlen(err)); |
539 | _exit(1); |
540 | default: |
541 | /* Parent process */ |
542 | close(s[1]); |
543 | ret = iomux(s[0], text, len, outbp); |
544 | waitpid(pid, NULL((void *)0), 0); /* Collect child to prevent zombies */ |
545 | |
546 | return (ret); |
547 | } |
548 | return (FALSE0); |
549 | } |
550 | |
551 | /* |
552 | * Multiplex read, write on socket fd passed. Put output in outbp |
553 | * Poll on the fd for both read and write readiness. |
554 | */ |
555 | int |
556 | iomux(int fd, char* const text, int len, struct buffer *outbp) |
557 | { |
558 | struct pollfd pfd[1]; |
559 | int nfds; |
560 | char *textcopy; |
561 | |
562 | textcopy = text; |
563 | fcntl(fd, F_SETFL4, O_NONBLOCK0x0004); |
564 | pfd[0].fd = fd; |
565 | |
566 | /* There is nothing to write if len is zero |
567 | * but the cmd's output should be read so shutdown |
568 | * the socket for writing only and don't wait for POLLOUT |
569 | */ |
570 | if (len == 0) { |
571 | shutdown(fd, SHUT_WR1); |
572 | pfd[0].events = POLLIN0x0001; |
573 | } else |
574 | pfd[0].events = POLLIN0x0001 | POLLOUT0x0004; |
575 | |
576 | while ((nfds = poll(pfd, 1, TIMEOUT10000)) != -1 || |
577 | (pfd[0].revents & (POLLERR0x0008 | POLLHUP0x0010 | POLLNVAL0x0020))) { |
578 | if (pfd[0].revents & POLLOUT0x0004 && len > 0) |
579 | pwriteout(fd, &textcopy, &len); |
580 | else if (pfd[0].revents & POLLIN0x0001) |
581 | if (preadin(fd, outbp) == FALSE0) |
582 | break; |
583 | if (len == 0 && pfd[0].events & POLLOUT0x0004) |
584 | pfd[0].events = POLLIN0x0001; |
585 | } |
586 | close(fd); |
587 | |
588 | /* In case if last line doesn't have a '\n' add the leftover |
589 | * characters to buffer. |
590 | */ |
591 | if (leftover[0] != '\0') { |
592 | addline(outbp, leftover)addlinef(outbp, "%s", leftover); |
593 | leftover[0] = '\0'; |
594 | } |
595 | if (nfds == 0) { |
596 | dobeep(); |
597 | ewprintf("poll timed out"); |
598 | return (FALSE0); |
599 | } else if (nfds == -1) { |
600 | dobeep(); |
601 | ewprintf("poll error"); |
602 | return (FALSE0); |
603 | } |
604 | return (popbuftop(outbp, WNONE0x00)); |
605 | } |
606 | |
607 | /* |
608 | * Write some text from region to fd. Once done shutdown the |
609 | * write end. |
610 | */ |
611 | void |
612 | pwriteout(int fd, char **text, int *len) |
613 | { |
614 | int w; |
615 | |
616 | if (((w = send(fd, *text, *len, MSG_NOSIGNAL0x400)) == -1)) { |
617 | switch(errno(*__errno())) { |
618 | case EPIPE32: |
619 | *len = -1; |
620 | break; |
621 | case EAGAIN35: |
622 | return; |
623 | } |
624 | } else |
625 | *len -= w; |
626 | |
627 | *text += w; |
628 | if (*len <= 0) |
629 | shutdown(fd, SHUT_WR1); |
630 | } |
631 | |
632 | /* |
633 | * Read some data from socket fd, break on '\n' and add |
634 | * to buffer. If couldn't break on newline hold leftover |
635 | * characters and append in next iteration. |
636 | */ |
637 | int |
638 | preadin(int fd, struct buffer *bp) |
639 | { |
640 | int len; |
641 | char buf[BUFSIZ1024], *p, *q; |
642 | |
643 | if ((len = read(fd, buf, BUFSIZ1024 - 1)) <= 0) |
644 | return (FALSE0); |
645 | |
646 | buf[len] = '\0'; |
647 | p = q = buf; |
Although the value stored to 'q' is used in the enclosing expression, the value is never actually read from 'q' | |
648 | if (leftover[0] != '\0' && ((q = strchr(p, *bp->b_nlchr)) != NULL((void *)0))) { |
649 | *q++ = '\0'; |
650 | if (strlcat(leftover, p, sizeof(leftover)) >= |
651 | sizeof(leftover)) { |
652 | dobeep(); |
653 | ewprintf("line too long"); |
654 | return (FALSE0); |
655 | } |
656 | addline(bp, leftover)addlinef(bp, "%s", leftover); |
657 | leftover[0] = '\0'; |
658 | p = q; |
659 | } |
660 | while ((q = strchr(p, *bp->b_nlchr)) != NULL((void *)0)) { |
661 | *q++ = '\0'; |
662 | addline(bp, p)addlinef(bp, "%s", p); |
663 | p = q; |
664 | } |
665 | if (strlcpy(leftover, p, sizeof(leftover)) >= sizeof(leftover)) { |
666 | dobeep(); |
667 | ewprintf("line too long"); |
668 | return (FALSE0); |
669 | } |
670 | return (TRUE1); |
671 | } |