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; 118 119 (void) setlocale(LC_ALL, ""); 120 121 fflag = 0; 122 while ((c = getopt(argc, argv, "Eae:f:n")) != -1) 123 switch (c) { 124 case 'E': 125 rflags = REG_EXTENDED; 126 break; 127 case 'a': 128 aflag = 1; 129 break; 130 case 'e': 131 eflag = 1; 132 add_compunit(CU_STRING, optarg); 133 break; 134 case 'f': 135 fflag = 1; 136 add_compunit(CU_FILE, optarg); 137 break; 138 case 'n': 139 nflag = 1; 140 break; 141 default: 142 case '?': 143 usage(); 144 } 145 argc -= optind; 146 argv += optind; 147 148 /* First usage case; script is the first arg */ 149 if (!eflag && !fflag && *argv) { 150 add_compunit(CU_STRING, *argv); 151 argv++; 152 } 153 154 compile(); 155 156 /* Continue with first and start second usage */ 157 if (*argv) 158 for (; *argv; argv++) 159 add_file(*argv); 160 else 161 add_file(NULL); 162 process(); 163 cfclose(prog, NULL); 164 if (fclose(stdout)) 165 err(1, "stdout"); 166 exit (0); 167 } 168 169 static void 170 usage() 171 { 172 (void)fprintf(stderr, "%s\n%s\n", 173 "usage: sed script [-Ean] [file ...]", 174 " sed [-an] [-e script] ... [-f script_file] ... [file ...]"); 175 exit(1); 176 } 177 178 /* 179 * Like fgets, but go through the chain of compilation units chaining them 180 * together. Empty strings and files are ignored. 181 */ 182 char * 183 cu_fgets(buf, n, more) 184 char *buf; 185 int n; 186 int *more; 187 { 188 static enum {ST_EOF, ST_FILE, ST_STRING} state = ST_EOF; 189 static FILE *f; /* Current open file */ 190 static char *s; /* Current pointer inside string */ 191 static char string_ident[30]; 192 char *p; 193 194 again: 195 switch (state) { 196 case ST_EOF: 197 if (script == NULL) { 198 if (more != NULL) 199 *more = 0; 200 return (NULL); 201 } 202 linenum = 0; 203 switch (script->type) { 204 case CU_FILE: 205 if ((f = fopen(script->s, "r")) == NULL) 206 err(1, "%s", script->s); 207 fname = script->s; 208 state = ST_FILE; 209 goto again; 210 case CU_STRING: 211 if ((snprintf(string_ident, 212 sizeof(string_ident), "\"%s\"", script->s)) >= 213 sizeof(string_ident) - 1) 214 (void)strcpy(string_ident + 215 sizeof(string_ident) - 6, " ...\""); 216 fname = string_ident; 217 s = script->s; 218 state = ST_STRING; 219 goto again; 220 } 221 case ST_FILE: 222 if ((p = fgets(buf, n, f)) != NULL) { 223 linenum++; 224 if (linenum == 1 && buf[0] == '#' && buf[1] == 'n') 225 nflag = 1; 226 if (more != NULL) 227 *more = !feof(f); 228 return (p); 229 } 230 script = script->next; 231 (void)fclose(f); 232 state = ST_EOF; 233 goto again; 234 case ST_STRING: 235 if (linenum == 0 && s[0] == '#' && s[1] == 'n') 236 nflag = 1; 237 p = buf; 238 for (;;) { 239 if (n-- <= 1) { 240 *p = '\0'; 241 linenum++; 242 if (more != NULL) 243 *more = 1; 244 return (buf); 245 } 246 switch (*s) { 247 case '\0': 248 state = ST_EOF; 249 if (s == script->s) { 250 script = script->next; 251 goto again; 252 } else { 253 script = script->next; 254 *p = '\0'; 255 linenum++; 256 if (more != NULL) 257 *more = 0; 258 return (buf); 259 } 260 case '\n': 261 *p++ = '\n'; 262 *p = '\0'; 263 s++; 264 linenum++; 265 if (more != NULL) 266 *more = 0; 267 return (buf); 268 default: 269 *p++ = *s++; 270 } 271 } 272 } 273 /* NOTREACHED */ 274 return (NULL); 275 } 276 277 /* 278 * Like fgets, but go through the list of files chaining them together. 279 * Set len to the length of the line. 280 */ 281 int 282 mf_fgets(sp, spflag) 283 SPACE *sp; 284 enum e_spflag spflag; 285 { 286 static FILE *f; /* Current open file */ 287 size_t len; 288 char *p; 289 int c; 290 291 if (f == NULL) 292 /* Advance to first non-empty file */ 293 for (;;) { 294 if (files == NULL) { 295 lastline = 1; 296 return (0); 297 } 298 if (files->fname == NULL) { 299 f = stdin; 300 fname = "stdin"; 301 } else { 302 fname = files->fname; 303 if ((f = fopen(fname, "r")) == NULL) 304 err(1, "%s", fname); 305 } 306 if ((c = getc(f)) != EOF) { 307 (void)ungetc(c, f); 308 break; 309 } 310 (void)fclose(f); 311 files = files->next; 312 } 313 314 if (lastline) { 315 sp->len = 0; 316 return (0); 317 } 318 319 /* 320 * Use fgetln so that we can handle essentially infinite input data. 321 * Can't use the pointer into the stdio buffer as the process space 322 * because the ungetc() can cause it to move. 323 */ 324 p = fgetln(f, &len); 325 if (ferror(f)) 326 errx(1, "%s: %s", fname, strerror(errno ? errno : EIO)); 327 cspace(sp, p, len, spflag); 328 329 linenum++; 330 /* Advance to next non-empty file */ 331 while ((c = getc(f)) == EOF) { 332 (void)fclose(f); 333 files = files->next; 334 if (files == NULL) { 335 lastline = 1; 336 return (1); 337 } 338 if (files->fname == NULL) { 339 f = stdin; 340 fname = "stdin"; 341 } else { 342 fname = files->fname; 343 if ((f = fopen(fname, "r")) == NULL) 344 err(1, "%s", fname); 345 } 346 } 347 (void)ungetc(c, f); 348 return (1); 349 } 350 351 /* 352 * Add a compilation unit to the linked list 353 */ 354 static void 355 add_compunit(type, s) 356 enum e_cut type; 357 char *s; 358 { 359 struct s_compunit *cu; 360 361 cu = xmalloc(sizeof(struct s_compunit)); 362 cu->type = type; 363 cu->s = s; 364 cu->next = NULL; 365 *cu_nextp = cu; 366 cu_nextp = &cu->next; 367 } 368 369 /* 370 * Add a file to the linked list 371 */ 372 static void 373 add_file(s) 374 char *s; 375 { 376 struct s_flist *fp; 377 378 fp = xmalloc(sizeof(struct s_flist)); 379 fp->next = NULL; 380 *fl_nextp = fp; 381 fp->fname = s; 382 fl_nextp = &fp->next; 383 } 384