1 /* 2 * Copyright 2020 OmniOS Community Edition (OmniOSce) Association. 3 * Copyright (c) 2013 Johann 'Myrkraverk' Oskarsson <johann@myrkraverk.com> 4 * Copyright (c) 2011 Gary Mills 5 * Copyright 2011 Nexenta Systems, Inc. All rights reserved. 6 * Copyright (c) 1992 Diomidis Spinellis. 7 * Copyright (c) 1992, 1993 8 * The Regents of the University of California. All rights reserved. 9 * 10 * This code is derived from software contributed to Berkeley by 11 * Diomidis Spinellis of Imperial College, University of London. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 4. Neither the name of the University nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 */ 37 38 #include <sys/types.h> 39 #include <sys/mman.h> 40 #include <sys/param.h> 41 #include <sys/stat.h> 42 43 #include <err.h> 44 #include <errno.h> 45 #include <fcntl.h> 46 #include <getopt.h> 47 #include <libgen.h> 48 #include <libintl.h> 49 #include <limits.h> 50 #include <locale.h> 51 #include <regex.h> 52 #include <stddef.h> 53 #include <stdio.h> 54 #include <stdlib.h> 55 #include <string.h> 56 #include <unistd.h> 57 58 #include "defs.h" 59 #include "extern.h" 60 61 /* 62 * Linked list of units (strings and files) to be compiled 63 */ 64 struct s_compunit { 65 struct s_compunit *next; 66 enum e_cut {CU_FILE, CU_STRING} type; 67 char *s; /* Pointer to string or fname */ 68 }; 69 70 /* 71 * Linked list pointer to compilation units and pointer to current 72 * next pointer. 73 */ 74 static struct s_compunit *script, **cu_nextp = &script; 75 76 /* 77 * Linked list of files to be processed 78 */ 79 struct s_flist { 80 char *fname; 81 struct s_flist *next; 82 }; 83 84 /* 85 * Linked list pointer to files and pointer to current 86 * next pointer. 87 */ 88 static struct s_flist *files, **fl_nextp = &files; 89 90 FILE *infile; /* Current input file */ 91 FILE *outfile; /* Current output file */ 92 93 int aflag, eflag, nflag; 94 int rflags = 0; 95 static int rval; /* Exit status */ 96 97 static int ispan; /* Whether inplace editing spans across files */ 98 99 /* 100 * Current file and line number; line numbers restart across compilation 101 * units, but span across input files. The latter is optional if editing 102 * in place. 103 */ 104 const char *fname; /* File name. */ 105 const char *outfname; /* Output file name */ 106 static char oldfname[PATH_MAX]; /* Old file name (for in-place editing) */ 107 static char tmpfname[PATH_MAX]; /* Temporary file name (for in-place editing) */ 108 static const char *inplace; /* Inplace edit file extension. */ 109 ulong_t linenum; 110 111 static const struct option lopts[] = { 112 {"in-place", optional_argument, NULL, 'i'}, 113 {NULL, 0, NULL, 0} 114 }; 115 116 static void add_compunit(enum e_cut, char *); 117 static void add_file(char *); 118 static void usage(void); 119 120 121 int 122 main(int argc, char *argv[]) 123 { 124 int c, fflag; 125 char *temp_arg; 126 127 (void) setlocale(LC_ALL, ""); 128 129 #ifndef TEXT_DOMAIN 130 #define TEXT_DOMAIN "SYS_TEST" 131 #endif 132 (void) textdomain(TEXT_DOMAIN); 133 134 fflag = 0; 135 inplace = NULL; 136 137 while ((c = getopt_long(argc, argv, "EI::ae:f:i::lnr", lopts, NULL)) != 138 -1) 139 switch (c) { 140 case 'r': /* Gnu sed compat */ 141 case 'E': 142 rflags = REG_EXTENDED; 143 break; 144 case 'I': 145 if (optarg != NULL) 146 inplace = optarg; 147 else 148 inplace = ""; 149 ispan = 1; /* span across input files */ 150 break; 151 case 'a': 152 aflag = 1; 153 break; 154 case 'e': 155 eflag = 1; 156 if (asprintf(&temp_arg, "%s\n", optarg) < 1) 157 err(1, "asprintf"); 158 add_compunit(CU_STRING, temp_arg); 159 break; 160 case 'f': 161 fflag = 1; 162 add_compunit(CU_FILE, optarg); 163 break; 164 case 'i': 165 if (optarg != NULL) 166 inplace = optarg; 167 else 168 inplace = ""; 169 ispan = 0; /* don't span across input files */ 170 break; 171 case 'l': 172 /* On SunOS, setlinebuf "returns no useful value */ 173 (void) setlinebuf(stdout); 174 break; 175 case 'n': 176 nflag = 1; 177 break; 178 default: 179 case '?': 180 usage(); 181 } 182 argc -= optind; 183 argv += optind; 184 185 /* First usage case; script is the first arg */ 186 if (!eflag && !fflag && *argv) { 187 add_compunit(CU_STRING, *argv); 188 argv++; 189 } 190 191 compile(); 192 193 /* Continue with first and start second usage */ 194 if (*argv) 195 for (; *argv; argv++) 196 add_file(*argv); 197 else 198 add_file(NULL); 199 process(); 200 cfclose(prog, NULL); 201 if (fclose(stdout)) 202 err(1, "stdout"); 203 return (rval); 204 } 205 206 static void 207 usage(void) 208 { 209 (void) fputs(_("usage: sed script [-Ealn] [-i[extension]] [file...]\n" 210 " sed [-Ealn] [-i[extension]] [-e script]... " 211 "[-f script_file]... [file...]\n"), 212 stderr); 213 exit(1); 214 } 215 216 /* 217 * Like fgets, but go through the chain of compilation units chaining them 218 * together. Empty strings and files are ignored. 219 */ 220 char * 221 cu_fgets(char *buf, int n, int *more) 222 { 223 static enum {ST_EOF, ST_FILE, ST_STRING} state = ST_EOF; 224 static FILE *f; /* Current open file */ 225 static char *s; /* Current pointer inside string */ 226 static char string_ident[30]; 227 char *p; 228 229 again: 230 switch (state) { 231 case ST_EOF: 232 if (script == NULL) { 233 if (more != NULL) 234 *more = 0; 235 return (NULL); 236 } 237 linenum = 0; 238 switch (script->type) { 239 case CU_FILE: 240 if ((f = fopen(script->s, "r")) == NULL) 241 err(1, "%s", script->s); 242 fname = script->s; 243 state = ST_FILE; 244 goto again; 245 case CU_STRING: 246 if (((size_t)snprintf(string_ident, 247 sizeof (string_ident), "\"%s\"", script->s)) >= 248 sizeof (string_ident) - 1) 249 (void) strcpy(string_ident + 250 sizeof (string_ident) - 6, " ...\""); 251 fname = string_ident; 252 s = script->s; 253 state = ST_STRING; 254 goto again; 255 default: 256 errx(1, "BUG: Unknown script type: %d\n", script->type); 257 } 258 /*NOTREACHED*/ 259 260 case ST_FILE: 261 if ((p = fgets(buf, n, f)) != NULL) { 262 linenum++; 263 if (linenum == 1 && buf[0] == '#' && buf[1] == 'n') 264 nflag = 1; 265 if (more != NULL) 266 *more = !feof(f); 267 return (p); 268 } 269 script = script->next; 270 (void) fclose(f); 271 state = ST_EOF; 272 goto again; 273 case ST_STRING: 274 if (linenum == 0 && s[0] == '#' && s[1] == 'n') 275 nflag = 1; 276 p = buf; 277 for (;;) { 278 if (n-- <= 1) { 279 *p = '\0'; 280 linenum++; 281 if (more != NULL) 282 *more = 1; 283 return (buf); 284 } 285 switch (*s) { 286 case '\0': 287 state = ST_EOF; 288 if (s == script->s) { 289 script = script->next; 290 goto again; 291 } else { 292 script = script->next; 293 *p = '\0'; 294 linenum++; 295 if (more != NULL) 296 *more = 0; 297 return (buf); 298 } 299 case '\n': 300 *p++ = '\n'; 301 *p = '\0'; 302 s++; 303 linenum++; 304 if (more != NULL) 305 *more = 0; 306 return (buf); 307 default: 308 *p++ = *s++; 309 } 310 } 311 } 312 /* NOTREACHED */ 313 return (NULL); 314 } 315 316 /* 317 * Like fgets, but go through the list of files chaining them together. 318 * Set len to the length of the line. 319 */ 320 int 321 mf_fgets(SPACE *sp, enum e_spflag spflag) 322 { 323 struct stat sb, nsb; 324 ssize_t len; 325 static char *p = NULL; 326 static size_t plen = 0; 327 int c; 328 static int firstfile; 329 330 if (infile == NULL) { 331 /* stdin? */ 332 if (files->fname == NULL) { 333 if (inplace != NULL) 334 errx(1, 335 _("-I or -i may not be used with stdin")); 336 infile = stdin; 337 fname = "stdin"; 338 outfile = stdout; 339 outfname = "stdout"; 340 } 341 firstfile = 1; 342 } 343 344 for (;;) { 345 if (infile != NULL && (c = getc(infile)) != EOF) { 346 (void) ungetc(c, infile); 347 break; 348 } 349 /* If we are here then either eof or no files are open yet */ 350 if (infile == stdin) { 351 sp->len = 0; 352 return (0); 353 } 354 if (infile != NULL) { 355 (void) fclose(infile); 356 if (*oldfname != '\0') { 357 /* if there was a backup file, remove it */ 358 (void) unlink(oldfname); 359 /* 360 * Backup the original. Note that hard links 361 * are not supported on all filesystems. 362 */ 363 if ((link(fname, oldfname) != 0) && 364 (rename(fname, oldfname) != 0)) { 365 warn("rename()"); 366 if (*tmpfname) 367 (void) unlink(tmpfname); 368 exit(1); 369 } 370 *oldfname = '\0'; 371 } 372 if (*tmpfname != '\0') { 373 if (outfile != NULL && outfile != stdout) 374 if (fclose(outfile) != 0) { 375 warn("fclose()"); 376 (void) unlink(tmpfname); 377 exit(1); 378 } 379 outfile = NULL; 380 if (rename(tmpfname, fname) != 0) { 381 /* this should not happen really! */ 382 warn("rename()"); 383 (void) unlink(tmpfname); 384 exit(1); 385 } 386 *tmpfname = '\0'; 387 } 388 outfname = NULL; 389 } 390 if (firstfile == 0) 391 files = files->next; 392 else 393 firstfile = 0; 394 if (files == NULL) { 395 sp->len = 0; 396 return (0); 397 } 398 fname = files->fname; 399 if (inplace != NULL) { 400 char bn[PATH_MAX]; 401 char dn[PATH_MAX]; 402 (void) strlcpy(bn, fname, sizeof (bn)); 403 (void) strlcpy(dn, fname, sizeof (dn)); 404 if (lstat(fname, &sb) != 0) 405 err(1, "%s", fname); 406 if (!(sb.st_mode & S_IFREG)) 407 fatal(_("in-place editing only " 408 "works for regular files")); 409 if (*inplace != '\0') { 410 (void) strlcpy(oldfname, fname, 411 sizeof (oldfname)); 412 len = strlcat(oldfname, inplace, 413 sizeof (oldfname)); 414 if (len > sizeof (oldfname)) 415 fatal(_("name too long")); 416 } 417 len = snprintf(tmpfname, sizeof (tmpfname), 418 "%s/.!%ld!%s", dirname(dn), (long)getpid(), 419 basename(bn)); 420 if (len >= sizeof (tmpfname)) 421 fatal(_("name too long")); 422 (void) unlink(tmpfname); 423 if ((outfile = fopen(tmpfname, "w")) == NULL) 424 err(1, "%s", fname); 425 /* 426 * Some file systems don't support chown or 427 * chmod fully. On those, the owner/group and 428 * permissions will already be set to what 429 * they need to be. 430 */ 431 if (fstat(fileno(outfile), &nsb) != 0) { 432 warn("fstat()"); 433 } 434 if (((sb.st_uid != nsb.st_uid) || 435 (sb.st_gid != nsb.st_gid)) && 436 (fchown(fileno(outfile), sb.st_uid, sb.st_gid) 437 != 0)) 438 warn("fchown()"); 439 if ((sb.st_mode != nsb.st_mode) && 440 (fchmod(fileno(outfile), sb.st_mode & 07777) != 0)) 441 warn("fchmod()"); 442 outfname = tmpfname; 443 if (!ispan) { 444 linenum = 0; 445 resetstate(); 446 } 447 } else { 448 outfile = stdout; 449 outfname = "stdout"; 450 } 451 if ((infile = fopen(fname, "r")) == NULL) { 452 warn("%s", fname); 453 rval = 1; 454 continue; 455 } 456 } 457 /* 458 * We are here only when infile is open and we still have something 459 * to read from it. 460 * 461 * Use getline() so that we can handle essentially infinite 462 * input data. The p and plen are static so each invocation gives 463 * getline() the same buffer which is expanded as needed. 464 */ 465 len = getline(&p, &plen, infile); 466 if (len == -1) 467 err(1, "%s", fname); 468 if (len != 0 && p[len - 1] == '\n') 469 len--; 470 cspace(sp, p, len, spflag); 471 472 linenum++; 473 474 return (1); 475 } 476 477 /* 478 * Add a compilation unit to the linked list 479 */ 480 static void 481 add_compunit(enum e_cut type, char *s) 482 { 483 struct s_compunit *cu; 484 485 if ((cu = malloc(sizeof (struct s_compunit))) == NULL) 486 err(1, "malloc"); 487 cu->type = type; 488 cu->s = s; 489 cu->next = NULL; 490 *cu_nextp = cu; 491 cu_nextp = &cu->next; 492 } 493 494 /* 495 * Add a file to the linked list 496 */ 497 static void 498 add_file(char *s) 499 { 500 struct s_flist *fp; 501 502 if ((fp = malloc(sizeof (struct s_flist))) == NULL) 503 err(1, "malloc"); 504 fp->next = NULL; 505 *fl_nextp = fp; 506 fp->fname = s; 507 fl_nextp = &fp->next; 508 } 509 510 int 511 lastline(void) 512 { 513 int ch; 514 515 if (feof(infile) != 0 || (ch = getc(infile)) == EOF) { 516 struct s_flist *f; 517 518 /* 519 * Reached the end of the current input file. 520 * If there are no more that contain data, then this is the 521 * last line. 522 */ 523 if (inplace != NULL && ispan == 0) 524 return (1); 525 526 for (f = files->next; f != NULL; f = f->next) { 527 struct stat st; 528 529 if (stat(f->fname, &st) == -1) { 530 /* Treat an error here as an empty file */ 531 continue; 532 } 533 if (st.st_size > 0) 534 return (0); 535 } 536 return (1); 537 } 538 539 (void) ungetc(ch, infile); 540 return (0); 541 } 542