main.c revision 1.14
1/* $NetBSD: main.c,v 1.14 2003/08/07 11:15:49 agc Exp $ */ 2 3/*- 4 * Copyright (c) 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Diomidis Spinellis of Imperial College, University of London. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35/*- 36 * Copyright (c) 1992 Diomidis Spinellis. 37 * 38 * This code is derived from software contributed to Berkeley by 39 * Diomidis Spinellis of Imperial College, University of London. 40 * 41 * Redistribution and use in source and binary forms, with or without 42 * modification, are permitted provided that the following conditions 43 * are met: 44 * 1. Redistributions of source code must retain the above copyright 45 * notice, this list of conditions and the following disclaimer. 46 * 2. Redistributions in binary form must reproduce the above copyright 47 * notice, this list of conditions and the following disclaimer in the 48 * documentation and/or other materials provided with the distribution. 49 * 3. All advertising materials mentioning features or use of this software 50 * must display the following acknowledgement: 51 * This product includes software developed by the University of 52 * California, Berkeley and its contributors. 53 * 4. Neither the name of the University nor the names of its contributors 54 * may be used to endorse or promote products derived from this software 55 * without specific prior written permission. 56 * 57 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 58 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 59 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 60 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 61 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 62 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 63 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 64 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 65 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 66 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 67 * SUCH DAMAGE. 68 */ 69 70#include <sys/cdefs.h> 71#ifndef lint 72__COPYRIGHT("@(#) Copyright (c) 1992, 1993\n\ 73 The Regents of the University of California. All rights reserved.\n"); 74#endif /* not lint */ 75 76#ifndef lint 77#if 0 78static char sccsid[] = "@(#)main.c 8.2 (Berkeley) 1/3/94"; 79#else 80__RCSID("$NetBSD: main.c,v 1.14 2003/08/07 11:15:49 agc Exp $"); 81#endif 82#endif /* not lint */ 83 84#include <sys/types.h> 85 86#include <ctype.h> 87#include <errno.h> 88#include <fcntl.h> 89#include <regex.h> 90#include <stddef.h> 91#include <stdio.h> 92#include <stdlib.h> 93#include <string.h> 94#include <unistd.h> 95 96#include "defs.h" 97#include "extern.h" 98 99/* 100 * Linked list of units (strings and files) to be compiled 101 */ 102struct s_compunit { 103 struct s_compunit *next; 104 enum e_cut {CU_FILE, CU_STRING} type; 105 char *s; /* Pointer to string or fname */ 106}; 107 108/* 109 * Linked list pointer to compilation units and pointer to current 110 * next pointer. 111 */ 112static struct s_compunit *script, **cu_nextp = &script; 113 114/* 115 * Linked list of files to be processed 116 */ 117struct s_flist { 118 char *fname; 119 struct s_flist *next; 120}; 121 122/* 123 * Linked list pointer to files and pointer to current 124 * next pointer. 125 */ 126static struct s_flist *files, **fl_nextp = &files; 127 128int aflag, eflag, nflag, ere; 129 130/* 131 * Current file and line number; line numbers restart across compilation 132 * units, but span across input files. 133 */ 134char *fname; /* File name. */ 135u_long linenum; 136int lastline; /* TRUE on the last line of the last file */ 137 138static void add_compunit(enum e_cut, char *); 139static void add_file(char *); 140int main(int, char **); 141 142int 143main(int argc, char *argv[]) 144{ 145 int c, fflag; 146 147 fflag = 0; 148 while ((c = getopt(argc, argv, "ae:f:nE")) != -1) 149 switch (c) { 150 case 'a': 151 aflag = 1; 152 break; 153 case 'e': 154 eflag = 1; 155 add_compunit(CU_STRING, optarg); 156 break; 157 case 'f': 158 fflag = 1; 159 add_compunit(CU_FILE, optarg); 160 break; 161 case 'n': 162 nflag = 1; 163 break; 164 case 'E': 165 ere = REG_EXTENDED; 166 break; 167 default: 168 case '?': 169 (void)fprintf(stderr, 170"usage:\t%s script [-anE] [file ...]\n\tsed [-an] [-e script] ... [-f script_file] ... [file ...]\n", 171 getprogname()); 172 exit(1); 173 } 174 argc -= optind; 175 argv += optind; 176 177 /* First usage case; script is the first arg */ 178 if (!eflag && !fflag && *argv) { 179 add_compunit(CU_STRING, *argv); 180 argv++; 181 } 182 183 compile(); 184 185 /* Continue with first and start second usage */ 186 if (*argv) 187 for (; *argv; argv++) 188 add_file(*argv); 189 else 190 add_file(NULL); 191 process(); 192 cfclose(prog, NULL); 193 if (fclose(stdout)) 194 err(FATAL, "stdout: %s", strerror(errno)); 195 exit (0); 196} 197 198/* 199 * Like fgets, but go through the chain of compilation units chaining them 200 * together. Empty strings and files are ignored. 201 */ 202char * 203cu_fgets(char *buf, int n) 204{ 205 static enum {ST_EOF, ST_FILE, ST_STRING} state = ST_EOF; 206 static FILE *f; /* Current open file */ 207 static char *s; /* Current pointer inside string */ 208 static char string_ident[30]; 209 char *p; 210 211again: 212 switch (state) { 213 case ST_EOF: 214 if (script == NULL) 215 return (NULL); 216 linenum = 0; 217 switch (script->type) { 218 case CU_FILE: 219 if ((f = fopen(script->s, "r")) == NULL) 220 err(FATAL, 221 "%s: %s", script->s, strerror(errno)); 222 fname = script->s; 223 state = ST_FILE; 224 goto again; 225 case CU_STRING: 226 if ((snprintf(string_ident, 227 sizeof(string_ident), "\"%s\"", script->s)) >= 228 sizeof(string_ident) - 1) 229 (void)strcpy(string_ident + 230 sizeof(string_ident) - 6, " ...\""); 231 fname = string_ident; 232 s = script->s; 233 state = ST_STRING; 234 goto again; 235 } 236 case ST_FILE: 237 if ((p = fgets(buf, n, f)) != NULL) { 238 linenum++; 239 if (linenum == 1 && buf[0] == '#' && buf[1] == 'n') 240 nflag = 1; 241 return (p); 242 } 243 script = script->next; 244 (void)fclose(f); 245 state = ST_EOF; 246 goto again; 247 case ST_STRING: 248 if (linenum == 0 && s[0] == '#' && s[1] == 'n') 249 nflag = 1; 250 p = buf; 251 for (;;) { 252 if (n-- <= 1) { 253 *p = '\0'; 254 linenum++; 255 return (buf); 256 } 257 switch (*s) { 258 case '\0': 259 state = ST_EOF; 260 if (s == script->s) { 261 script = script->next; 262 goto again; 263 } else { 264 script = script->next; 265 *p = '\0'; 266 linenum++; 267 return (buf); 268 } 269 case '\n': 270 *p++ = '\n'; 271 *p = '\0'; 272 s++; 273 linenum++; 274 return (buf); 275 default: 276 *p++ = *s++; 277 } 278 } 279 } 280 /* NOTREACHED */ 281 return (NULL); 282} 283 284/* 285 * Like fgets, but go through the list of files chaining them together. 286 * Set len to the length of the line. 287 */ 288int 289mf_fgets(SPACE *sp, 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(FATAL, "%s: %s", 310 fname, strerror(errno)); 311 } 312 if ((c = getc(f)) != EOF) { 313 (void)ungetc(c, f); 314 break; 315 } 316 (void)fclose(f); 317 files = files->next; 318 } 319 320 if (lastline) { 321 sp->len = 0; 322 return (0); 323 } 324 325 /* 326 * Use fgetln so that we can handle essentially infinite input data. 327 * Can't use the pointer into the stdio buffer as the process space 328 * because the ungetc() can cause it to move. 329 */ 330 p = fgetln(f, &len); 331 if (ferror(f)) 332 err(FATAL, "%s: %s", fname, strerror(errno ? errno : EIO)); 333 cspace(sp, p, len, spflag); 334 335 linenum++; 336 /* Advance to next non-empty file */ 337 while ((c = getc(f)) == EOF) { 338 (void)fclose(f); 339 files = files->next; 340 if (files == NULL) { 341 lastline = 1; 342 return (1); 343 } 344 if (files->fname == NULL) { 345 f = stdin; 346 fname = "stdin"; 347 } else { 348 fname = files->fname; 349 if ((f = fopen(fname, "r")) == NULL) 350 err(FATAL, "%s: %s", fname, strerror(errno)); 351 } 352 } 353 (void)ungetc(c, f); 354 return (1); 355} 356 357/* 358 * Add a compilation unit to the linked list 359 */ 360static void 361add_compunit(enum e_cut type, char *s) 362{ 363 struct s_compunit *cu; 364 365 cu = xmalloc(sizeof(struct s_compunit)); 366 cu->type = type; 367 cu->s = s; 368 cu->next = NULL; 369 *cu_nextp = cu; 370 cu_nextp = &cu->next; 371} 372 373/* 374 * Add a file to the linked list 375 */ 376static void 377add_file(char *s) 378{ 379 struct s_flist *fp; 380 381 fp = xmalloc(sizeof(struct s_flist)); 382 fp->next = NULL; 383 *fl_nextp = fp; 384 fp->fname = s; 385 fl_nextp = &fp->next; 386} 387