| File: | src/usr.bin/mg/region.c |
| Warning: | line 290, column 8 Value stored to 'prefix' during its initialization is never read |
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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; |
Value stored to 'prefix' during its initialization is never read | |
| 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; |
| 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 | } |