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 "$Id$"; 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) 180 char *buf; 181 int n; 182 { 183 static enum {ST_EOF, ST_FILE, ST_STRING} state = ST_EOF; 184 static FILE *f; /* Current open file */ 185 static char *s; /* Current pointer inside string */ 186 static char string_ident[30]; 187 char *p; 188 189 again: 190 switch (state) { 191 case ST_EOF: 192 if (script == NULL) 193 return (NULL); 194 linenum = 0; 195 switch (script->type) { 196 case CU_FILE: 197 if ((f = fopen(script->s, "r")) == NULL) 198 err(1, "%s", script->s); 199 fname = script->s; 200 state = ST_FILE; 201 goto again; 202 case CU_STRING: 203 if ((snprintf(string_ident, 204 sizeof(string_ident), "\"%s\"", script->s)) >= 205 sizeof(string_ident) - 1) 206 (void)strcpy(string_ident + 207 sizeof(string_ident) - 6, " ...\""); 208 fname = string_ident; 209 s = script->s; 210 state = ST_STRING; 211 goto again; 212 } 213 case ST_FILE: 214 if ((p = fgets(buf, n, f)) != NULL) { 215 linenum++; 216 if (linenum == 1 && buf[0] == '#' && buf[1] == 'n') 217 nflag = 1; 218 return (p); 219 } 220 script = script->next; 221 (void)fclose(f); 222 state = ST_EOF; 223 goto again; 224 case ST_STRING: 225 if (linenum == 0 && s[0] == '#' && s[1] == 'n') 226 nflag = 1; 227 p = buf; 228 for (;;) { 229 if (n-- <= 1) { 230 *p = '\0'; 231 linenum++; 232 return (buf); 233 } 234 switch (*s) { 235 case '\0': 236 state = ST_EOF; 237 if (s == script->s) { 238 script = script->next; 239 goto again; 240 } else { 241 script = script->next; 242 *p = '\0'; 243 linenum++; 244 return (buf); 245 } 246 case '\n': 247 *p++ = '\n'; 248 *p = '\0'; 249 s++; 250 linenum++; 251 return (buf); 252 default: 253 *p++ = *s++; 254 } 255 } 256 } 257 /* NOTREACHED */ 258 return (NULL); 259 } 260 261 /* 262 * Like fgets, but go through the list of files chaining them together. 263 * Set len to the length of the line. 264 */ 265 int 266 mf_fgets(sp, spflag) 267 SPACE *sp; 268 enum e_spflag spflag; 269 { 270 static FILE *f; /* Current open file */ 271 size_t len; 272 char *p; 273 int c; 274 275 if (f == NULL) 276 /* Advance to first non-empty file */ 277 for (;;) { 278 if (files == NULL) { 279 lastline = 1; 280 return (0); 281 } 282 if (files->fname == NULL) { 283 f = stdin; 284 fname = "stdin"; 285 } else { 286 fname = files->fname; 287 if ((f = fopen(fname, "r")) == NULL) 288 err(1, "%s", fname); 289 } 290 if ((c = getc(f)) != EOF) { 291 (void)ungetc(c, f); 292 break; 293 } 294 (void)fclose(f); 295 files = files->next; 296 } 297 298 if (lastline) { 299 sp->len = 0; 300 return (0); 301 } 302 303 /* 304 * Use fgetln so that we can handle essentially infinite input data. 305 * Can't use the pointer into the stdio buffer as the process space 306 * because the ungetc() can cause it to move. 307 */ 308 p = fgetln(f, &len); 309 if (ferror(f)) 310 errx(1, "%s: %s", fname, strerror(errno ? errno : EIO)); 311 cspace(sp, p, len, spflag); 312 313 linenum++; 314 /* Advance to next non-empty file */ 315 while ((c = getc(f)) == EOF) { 316 (void)fclose(f); 317 files = files->next; 318 if (files == NULL) { 319 lastline = 1; 320 return (1); 321 } 322 if (files->fname == NULL) { 323 f = stdin; 324 fname = "stdin"; 325 } else { 326 fname = files->fname; 327 if ((f = fopen(fname, "r")) == NULL) 328 err(1, "%s", fname); 329 } 330 } 331 (void)ungetc(c, f); 332 return (1); 333 } 334 335 /* 336 * Add a compilation unit to the linked list 337 */ 338 static void 339 add_compunit(type, s) 340 enum e_cut type; 341 char *s; 342 { 343 struct s_compunit *cu; 344 345 cu = xmalloc(sizeof(struct s_compunit)); 346 cu->type = type; 347 cu->s = s; 348 cu->next = NULL; 349 *cu_nextp = cu; 350 cu_nextp = &cu->next; 351 } 352 353 /* 354 * Add a file to the linked list 355 */ 356 static void 357 add_file(s) 358 char *s; 359 { 360 struct s_flist *fp; 361 362 fp = xmalloc(sizeof(struct s_flist)); 363 fp->next = NULL; 364 *fl_nextp = fp; 365 fp->fname = s; 366 fl_nextp = &fp->next; 367 } 368