1 /*- 2 * Copyright (c) 1992 Diomidis Spinellis. 3 * Copyright (c) 1992, 1993 4 * The Regents of the University of California. All rights reserved. 5 * 6 * This code is derived from software contributed to Berkeley by 7 * Diomidis Spinellis of Imperial College, University of London. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by the University of 20 * California, Berkeley and its contributors. 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 #ifndef lint 39 static const char copyright[] = 40 "@(#) Copyright (c) 1992, 1993\n\ 41 The Regents of the University of California. All rights reserved.\n"; 42 #endif /* not lint */ 43 44 #ifndef lint 45 #if 0 46 static char sccsid[] = "@(#)main.c 8.2 (Berkeley) 1/3/94"; 47 #endif 48 static const char rcsid[] = 49 "$FreeBSD$"; 50 #endif /* not lint */ 51 52 #include <sys/types.h> 53 54 #include <err.h> 55 #include <errno.h> 56 #include <fcntl.h> 57 #include <locale.h> 58 #include <regex.h> 59 #include <stddef.h> 60 #include <stdio.h> 61 #include <stdlib.h> 62 #include <string.h> 63 #include <unistd.h> 64 65 #include "defs.h" 66 #include "extern.h" 67 68 /* 69 * Linked list of units (strings and files) to be compiled 70 */ 71 struct s_compunit { 72 struct s_compunit *next; 73 enum e_cut {CU_FILE, CU_STRING} type; 74 char *s; /* Pointer to string or fname */ 75 }; 76 77 /* 78 * Linked list pointer to compilation units and pointer to current 79 * next pointer. 80 */ 81 static struct s_compunit *script, **cu_nextp = &script; 82 83 /* 84 * Linked list of files to be processed 85 */ 86 struct s_flist { 87 char *fname; 88 struct s_flist *next; 89 }; 90 91 /* 92 * Linked list pointer to files and pointer to current 93 * next pointer. 94 */ 95 static struct s_flist *files, **fl_nextp = &files; 96 97 int aflag, eflag, nflag; 98 int rflags = 0; 99 100 /* 101 * Current file and line number; line numbers restart across compilation 102 * units, but span across input files. 103 */ 104 char *fname; /* File name. */ 105 u_long linenum; 106 int lastline; /* TRUE on the last line of the last file */ 107 108 static void add_compunit __P((enum e_cut, char *)); 109 static void add_file __P((char *)); 110 static void usage __P((void)); 111 112 int 113 main(argc, argv) 114 int argc; 115 char *argv[]; 116 { 117 int c, fflag; 118 char *temp_arg; 119 120 (void) setlocale(LC_ALL, ""); 121 122 fflag = 0; 123 while ((c = getopt(argc, argv, "Eae:f:n")) != -1) 124 switch (c) { 125 case 'E': 126 rflags = REG_EXTENDED; 127 break; 128 case 'a': 129 aflag = 1; 130 break; 131 case 'e': 132 eflag = 1; 133 if ((temp_arg = malloc(strlen(optarg) + 2)) == NULL) 134 err(1, "malloc"); 135 strcpy(temp_arg, optarg); 136 strcat(temp_arg, "\n"); 137 add_compunit(CU_STRING, temp_arg); 138 break; 139 case 'f': 140 fflag = 1; 141 add_compunit(CU_FILE, optarg); 142 break; 143 case 'n': 144 nflag = 1; 145 break; 146 default: 147 case '?': 148 usage(); 149 } 150 argc -= optind; 151 argv += optind; 152 153 /* First usage case; script is the first arg */ 154 if (!eflag && !fflag && *argv) { 155 add_compunit(CU_STRING, *argv); 156 argv++; 157 } 158 159 compile(); 160 161 /* Continue with first and start second usage */ 162 if (*argv) 163 for (; *argv; argv++) 164 add_file(*argv); 165 else 166 add_file(NULL); 167 process(); 168 cfclose(prog, NULL); 169 if (fclose(stdout)) 170 err(1, "stdout"); 171 exit (0); 172 } 173 174 static void 175 usage() 176 { 177 (void)fprintf(stderr, "%s\n%s\n", 178 "usage: sed script [-Ean] [file ...]", 179 " sed [-an] [-e script] ... [-f script_file] ... [file ...]"); 180 exit(1); 181 } 182 183 /* 184 * Like fgets, but go through the chain of compilation units chaining them 185 * together. Empty strings and files are ignored. 186 */ 187 char * 188 cu_fgets(buf, n, more) 189 char *buf; 190 int n; 191 int *more; 192 { 193 static enum {ST_EOF, ST_FILE, ST_STRING} state = ST_EOF; 194 static FILE *f; /* Current open file */ 195 static char *s; /* Current pointer inside string */ 196 static char string_ident[30]; 197 char *p; 198 199 again: 200 switch (state) { 201 case ST_EOF: 202 if (script == NULL) { 203 if (more != NULL) 204 *more = 0; 205 return (NULL); 206 } 207 linenum = 0; 208 switch (script->type) { 209 case CU_FILE: 210 if ((f = fopen(script->s, "r")) == NULL) 211 err(1, "%s", script->s); 212 fname = script->s; 213 state = ST_FILE; 214 goto again; 215 case CU_STRING: 216 if ((snprintf(string_ident, 217 sizeof(string_ident), "\"%s\"", script->s)) >= 218 sizeof(string_ident) - 1) 219 (void)strcpy(string_ident + 220 sizeof(string_ident) - 6, " ...\""); 221 fname = string_ident; 222 s = script->s; 223 state = ST_STRING; 224 goto again; 225 } 226 case ST_FILE: 227 if ((p = fgets(buf, n, f)) != NULL) { 228 linenum++; 229 if (linenum == 1 && buf[0] == '#' && buf[1] == 'n') 230 nflag = 1; 231 if (more != NULL) 232 *more = !feof(f); 233 return (p); 234 } 235 script = script->next; 236 (void)fclose(f); 237 state = ST_EOF; 238 goto again; 239 case ST_STRING: 240 if (linenum == 0 && s[0] == '#' && s[1] == 'n') 241 nflag = 1; 242 p = buf; 243 for (;;) { 244 if (n-- <= 1) { 245 *p = '\0'; 246 linenum++; 247 if (more != NULL) 248 *more = 1; 249 return (buf); 250 } 251 switch (*s) { 252 case '\0': 253 state = ST_EOF; 254 if (s == script->s) { 255 script = script->next; 256 goto again; 257 } else { 258 script = script->next; 259 *p = '\0'; 260 linenum++; 261 if (more != NULL) 262 *more = 0; 263 return (buf); 264 } 265 case '\n': 266 *p++ = '\n'; 267 *p = '\0'; 268 s++; 269 linenum++; 270 if (more != NULL) 271 *more = 0; 272 return (buf); 273 default: 274 *p++ = *s++; 275 } 276 } 277 } 278 /* NOTREACHED */ 279 return (NULL); 280 } 281 282 /* 283 * Like fgets, but go through the list of files chaining them together. 284 * Set len to the length of the line. 285 */ 286 int 287 mf_fgets(sp, spflag) 288 SPACE *sp; 289 enum e_spflag spflag; 290 { 291 static FILE *f; /* Current open file */ 292 size_t len; 293 char *p; 294 int c; 295 296 if (f == NULL) 297 /* Advance to first non-empty file */ 298 for (;;) { 299 if (files == NULL) { 300 lastline = 1; 301 return (0); 302 } 303 if (files->fname == NULL) { 304 f = stdin; 305 fname = "stdin"; 306 } else { 307 fname = files->fname; 308 if ((f = fopen(fname, "r")) == NULL) 309 err(1, "%s", fname); 310 } 311 if ((c = getc(f)) != EOF) { 312 (void)ungetc(c, f); 313 break; 314 } 315 (void)fclose(f); 316 files = files->next; 317 } 318 319 if (lastline) { 320 sp->len = 0; 321 return (0); 322 } 323 324 /* 325 * Use fgetln so that we can handle essentially infinite input data. 326 * Can't use the pointer into the stdio buffer as the process space 327 * because the ungetc() can cause it to move. 328 */ 329 p = fgetln(f, &len); 330 if (ferror(f)) 331 errx(1, "%s: %s", fname, strerror(errno ? errno : EIO)); 332 cspace(sp, p, len, spflag); 333 334 linenum++; 335 /* Advance to next non-empty file */ 336 while ((c = getc(f)) == EOF) { 337 (void)fclose(f); 338 files = files->next; 339 if (files == NULL) { 340 lastline = 1; 341 return (1); 342 } 343 if (files->fname == NULL) { 344 f = stdin; 345 fname = "stdin"; 346 } else { 347 fname = files->fname; 348 if ((f = fopen(fname, "r")) == NULL) 349 err(1, "%s", fname); 350 } 351 } 352 (void)ungetc(c, f); 353 return (1); 354 } 355 356 /* 357 * Add a compilation unit to the linked list 358 */ 359 static void 360 add_compunit(type, s) 361 enum e_cut type; 362 char *s; 363 { 364 struct s_compunit *cu; 365 366 if ((cu = malloc(sizeof(struct s_compunit))) == NULL) 367 err(1, "malloc"); 368 cu->type = type; 369 cu->s = s; 370 cu->next = NULL; 371 *cu_nextp = cu; 372 cu_nextp = &cu->next; 373 } 374 375 /* 376 * Add a file to the linked list 377 */ 378 static void 379 add_file(s) 380 char *s; 381 { 382 struct s_flist *fp; 383 384 if ((fp = malloc(sizeof(struct s_flist))) == NULL) 385 err(1, "malloc"); 386 fp->next = NULL; 387 *fl_nextp = fp; 388 fp->fname = s; 389 fl_nextp = &fp->next; 390 } 391