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 "$Id: main.c,v 1.7 1997/08/11 07:21:03 charnier Exp $"; 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 99 /* 100 * Current file and line number; line numbers restart across compilation 101 * units, but span across input files. 102 */ 103 char *fname; /* File name. */ 104 u_long linenum; 105 int lastline; /* TRUE on the last line of the last file */ 106 107 static void add_compunit __P((enum e_cut, char *)); 108 static void add_file __P((char *)); 109 static void usage __P((void)); 110 111 int 112 main(argc, argv) 113 int argc; 114 char *argv[]; 115 { 116 int c, fflag; 117 118 (void) setlocale(LC_ALL, ""); 119 120 fflag = 0; 121 while ((c = getopt(argc, argv, "ae:f:n")) != -1) 122 switch (c) { 123 case 'a': 124 aflag = 1; 125 break; 126 case 'e': 127 eflag = 1; 128 add_compunit(CU_STRING, optarg); 129 break; 130 case 'f': 131 fflag = 1; 132 add_compunit(CU_FILE, optarg); 133 break; 134 case 'n': 135 nflag = 1; 136 break; 137 default: 138 case '?': 139 usage(); 140 } 141 argc -= optind; 142 argv += optind; 143 144 /* First usage case; script is the first arg */ 145 if (!eflag && !fflag && *argv) { 146 add_compunit(CU_STRING, *argv); 147 argv++; 148 } 149 150 compile(); 151 152 /* Continue with first and start second usage */ 153 if (*argv) 154 for (; *argv; argv++) 155 add_file(*argv); 156 else 157 add_file(NULL); 158 process(); 159 cfclose(prog, NULL); 160 if (fclose(stdout)) 161 err(1, "stdout"); 162 exit (0); 163 } 164 165 static void 166 usage() 167 { 168 (void)fprintf(stderr, "%s\n%s\n", 169 "usage: sed script [-an] [file ...]", 170 " sed [-an] [-e script] ... [-f script_file] ... [file ...]"); 171 exit(1); 172 } 173 174 /* 175 * Like fgets, but go through the chain of compilation units chaining them 176 * together. Empty strings and files are ignored. 177 */ 178 char * 179 cu_fgets(buf, n, more) 180 char *buf; 181 int n; 182 int *more; 183 { 184 static enum {ST_EOF, ST_FILE, ST_STRING} state = ST_EOF; 185 static FILE *f; /* Current open file */ 186 static char *s; /* Current pointer inside string */ 187 static char string_ident[30]; 188 char *p; 189 190 again: 191 switch (state) { 192 case ST_EOF: 193 if (script == NULL) { 194 if (more != NULL) 195 *more = 0; 196 return (NULL); 197 } 198 linenum = 0; 199 switch (script->type) { 200 case CU_FILE: 201 if ((f = fopen(script->s, "r")) == NULL) 202 err(1, "%s", script->s); 203 fname = script->s; 204 state = ST_FILE; 205 goto again; 206 case CU_STRING: 207 if ((snprintf(string_ident, 208 sizeof(string_ident), "\"%s\"", script->s)) >= 209 sizeof(string_ident) - 1) 210 (void)strcpy(string_ident + 211 sizeof(string_ident) - 6, " ...\""); 212 fname = string_ident; 213 s = script->s; 214 state = ST_STRING; 215 goto again; 216 } 217 case ST_FILE: 218 if ((p = fgets(buf, n, f)) != NULL) { 219 linenum++; 220 if (linenum == 1 && buf[0] == '#' && buf[1] == 'n') 221 nflag = 1; 222 if (more != NULL) 223 *more = !feof(f); 224 return (p); 225 } 226 script = script->next; 227 (void)fclose(f); 228 state = ST_EOF; 229 goto again; 230 case ST_STRING: 231 if (linenum == 0 && s[0] == '#' && s[1] == 'n') 232 nflag = 1; 233 p = buf; 234 for (;;) { 235 if (n-- <= 1) { 236 *p = '\0'; 237 linenum++; 238 if (more != NULL) 239 *more = 1; 240 return (buf); 241 } 242 switch (*s) { 243 case '\0': 244 state = ST_EOF; 245 if (s == script->s) { 246 script = script->next; 247 goto again; 248 } else { 249 script = script->next; 250 *p = '\0'; 251 linenum++; 252 if (more != NULL) 253 *more = 0; 254 return (buf); 255 } 256 case '\n': 257 *p++ = '\n'; 258 *p = '\0'; 259 s++; 260 linenum++; 261 if (more != NULL) 262 *more = 0; 263 return (buf); 264 default: 265 *p++ = *s++; 266 } 267 } 268 } 269 /* NOTREACHED */ 270 return (NULL); 271 } 272 273 /* 274 * Like fgets, but go through the list of files chaining them together. 275 * Set len to the length of the line. 276 */ 277 int 278 mf_fgets(sp, spflag) 279 SPACE *sp; 280 enum e_spflag spflag; 281 { 282 static FILE *f; /* Current open file */ 283 size_t len; 284 char *p; 285 int c; 286 287 if (f == NULL) 288 /* Advance to first non-empty file */ 289 for (;;) { 290 if (files == NULL) { 291 lastline = 1; 292 return (0); 293 } 294 if (files->fname == NULL) { 295 f = stdin; 296 fname = "stdin"; 297 } else { 298 fname = files->fname; 299 if ((f = fopen(fname, "r")) == NULL) 300 err(1, "%s", fname); 301 } 302 if ((c = getc(f)) != EOF) { 303 (void)ungetc(c, f); 304 break; 305 } 306 (void)fclose(f); 307 files = files->next; 308 } 309 310 if (lastline) { 311 sp->len = 0; 312 return (0); 313 } 314 315 /* 316 * Use fgetln so that we can handle essentially infinite input data. 317 * Can't use the pointer into the stdio buffer as the process space 318 * because the ungetc() can cause it to move. 319 */ 320 p = fgetln(f, &len); 321 if (ferror(f)) 322 errx(1, "%s: %s", fname, strerror(errno ? errno : EIO)); 323 cspace(sp, p, len, spflag); 324 325 linenum++; 326 /* Advance to next non-empty file */ 327 while ((c = getc(f)) == EOF) { 328 (void)fclose(f); 329 files = files->next; 330 if (files == NULL) { 331 lastline = 1; 332 return (1); 333 } 334 if (files->fname == NULL) { 335 f = stdin; 336 fname = "stdin"; 337 } else { 338 fname = files->fname; 339 if ((f = fopen(fname, "r")) == NULL) 340 err(1, "%s", fname); 341 } 342 } 343 (void)ungetc(c, f); 344 return (1); 345 } 346 347 /* 348 * Add a compilation unit to the linked list 349 */ 350 static void 351 add_compunit(type, s) 352 enum e_cut type; 353 char *s; 354 { 355 struct s_compunit *cu; 356 357 cu = xmalloc(sizeof(struct s_compunit)); 358 cu->type = type; 359 cu->s = s; 360 cu->next = NULL; 361 *cu_nextp = cu; 362 cu_nextp = &cu->next; 363 } 364 365 /* 366 * Add a file to the linked list 367 */ 368 static void 369 add_file(s) 370 char *s; 371 { 372 struct s_flist *fp; 373 374 fp = xmalloc(sizeof(struct s_flist)); 375 fp->next = NULL; 376 *fl_nextp = fp; 377 fp->fname = s; 378 fl_nextp = &fp->next; 379 } 380