main.c revision 1.19
1/* $NetBSD: main.c,v 1.19 2008/09/16 13:32:04 perry 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#if HAVE_NBTOOL_CONFIG_H 71#include "nbtool_config.h" 72#endif 73 74#include <sys/cdefs.h> 75#ifndef lint 76__COPYRIGHT("@(#) Copyright (c) 1992, 1993\ 77 The Regents of the University of California. All rights reserved."); 78#endif /* not lint */ 79 80#ifndef lint 81#if 0 82static char sccsid[] = "@(#)main.c 8.2 (Berkeley) 1/3/94"; 83#else 84__RCSID("$NetBSD: main.c,v 1.19 2008/09/16 13:32:04 perry Exp $"); 85#endif 86#endif /* not lint */ 87 88#include <sys/types.h> 89 90#include <ctype.h> 91#include <errno.h> 92#include <fcntl.h> 93#include <regex.h> 94#include <stddef.h> 95#include <stdio.h> 96#include <stdlib.h> 97#include <string.h> 98#include <unistd.h> 99 100#include "defs.h" 101#include "extern.h" 102 103/* 104 * Linked list of units (strings and files) to be compiled 105 */ 106struct s_compunit { 107 struct s_compunit *next; 108 enum e_cut {CU_FILE, CU_STRING} type; 109 char *s; /* Pointer to string or fname */ 110}; 111 112/* 113 * Linked list pointer to compilation units and pointer to current 114 * next pointer. 115 */ 116static struct s_compunit *script, **cu_nextp = &script; 117 118/* 119 * Linked list of files to be processed 120 */ 121struct s_flist { 122 char *fname; 123 struct s_flist *next; 124}; 125 126/* 127 * Linked list pointer to files and pointer to current 128 * next pointer. 129 */ 130static struct s_flist *files, **fl_nextp = &files; 131 132int aflag, eflag, nflag, ere; 133 134/* 135 * Current file and line number; line numbers restart across compilation 136 * units, but span across input files. 137 */ 138char *fname; /* File name. */ 139u_long linenum; 140int lastline; /* TRUE on the last line of the last file */ 141 142static void add_compunit(enum e_cut, char *); 143static void add_file(char *); 144int main(int, char **); 145 146int 147main(int argc, char *argv[]) 148{ 149 int c, fflag; 150 151 setprogname(*argv); 152 fflag = 0; 153 while ((c = getopt(argc, argv, "ae:f:nrE")) != -1) 154 switch (c) { 155 case 'a': 156 aflag = 1; 157 break; 158 case 'e': 159 eflag = 1; 160 add_compunit(CU_STRING, optarg); 161 break; 162 case 'f': 163 fflag = 1; 164 add_compunit(CU_FILE, optarg); 165 break; 166 case 'n': 167 nflag = 1; 168 break; 169 case 'r': 170 case 'E': 171 ere = REG_EXTENDED; 172 break; 173 default: 174 case '?': 175 (void)fprintf(stderr, 176"usage:\t%s [-aEnr] script [file ...]\n\t%s [-aEnr] [-e script] ... [-f script_file] ... [file ...]\n", 177 getprogname(), getprogname()); 178 exit(1); 179 } 180 argc -= optind; 181 argv += optind; 182 183 /* First usage case; script is the first arg */ 184 if (!eflag && !fflag && *argv) { 185 add_compunit(CU_STRING, *argv); 186 argv++; 187 } 188 189 compile(); 190 191 /* Continue with first and start second usage */ 192 if (*argv) 193 for (; *argv; argv++) 194 add_file(*argv); 195 else 196 add_file(NULL); 197 process(); 198 cfclose(prog, NULL); 199 if (fclose(stdout)) 200 err(FATAL, "stdout: %s", strerror(errno)); 201 exit (0); 202} 203 204/* 205 * Like fgets, but go through the chain of compilation units chaining them 206 * together. Empty strings and files are ignored. 207 */ 208char * 209cu_fgets(char *buf, int n) 210{ 211 static enum {ST_EOF, ST_FILE, ST_STRING} state = ST_EOF; 212 static FILE *f; /* Current open file */ 213 static char *s; /* Current pointer inside string */ 214 static char string_ident[30]; 215 char *p; 216 217again: 218 switch (state) { 219 case ST_EOF: 220 if (script == NULL) 221 return (NULL); 222 linenum = 0; 223 switch (script->type) { 224 case CU_FILE: 225 if ((f = fopen(script->s, "r")) == NULL) 226 err(FATAL, 227 "%s: %s", script->s, strerror(errno)); 228 fname = script->s; 229 state = ST_FILE; 230 goto again; 231 case CU_STRING: 232 if ((snprintf(string_ident, 233 sizeof(string_ident), "\"%s\"", script->s)) >= 234 sizeof(string_ident) - 1) 235 (void)strcpy(string_ident + 236 sizeof(string_ident) - 6, " ...\""); 237 fname = string_ident; 238 s = script->s; 239 state = ST_STRING; 240 goto again; 241 } 242 case ST_FILE: 243 if ((p = fgets(buf, n, f)) != NULL) { 244 linenum++; 245 if (linenum == 1 && buf[0] == '#' && buf[1] == 'n') 246 nflag = 1; 247 return (p); 248 } 249 script = script->next; 250 (void)fclose(f); 251 state = ST_EOF; 252 goto again; 253 case ST_STRING: 254 if (linenum == 0 && s[0] == '#' && s[1] == 'n') 255 nflag = 1; 256 p = buf; 257 for (;;) { 258 if (n-- <= 1) { 259 *p = '\0'; 260 linenum++; 261 return (buf); 262 } 263 switch (*s) { 264 case '\0': 265 state = ST_EOF; 266 if (s == script->s) { 267 script = script->next; 268 goto again; 269 } else { 270 script = script->next; 271 *p = '\0'; 272 linenum++; 273 return (buf); 274 } 275 case '\n': 276 *p++ = '\n'; 277 *p = '\0'; 278 s++; 279 linenum++; 280 return (buf); 281 default: 282 *p++ = *s++; 283 } 284 } 285 } 286 /* NOTREACHED */ 287 return (NULL); 288} 289 290/* 291 * Like fgets, but go through the list of files chaining them together. 292 * Set len to the length of the line. 293 */ 294int 295mf_fgets(SPACE *sp, enum e_spflag spflag) 296{ 297 static FILE *f; /* Current open file */ 298 size_t len; 299 char *p; 300 int c; 301 302 if (f == NULL) 303 /* Advance to first non-empty file */ 304 for (;;) { 305 if (files == NULL) { 306 lastline = 1; 307 return (0); 308 } 309 if (files->fname == NULL) { 310 f = stdin; 311 fname = "stdin"; 312 } else { 313 fname = files->fname; 314 if ((f = fopen(fname, "r")) == NULL) 315 err(FATAL, "%s: %s", 316 fname, strerror(errno)); 317 } 318 if ((c = getc(f)) != EOF) { 319 (void)ungetc(c, f); 320 break; 321 } 322 (void)fclose(f); 323 files = files->next; 324 } 325 326 if (lastline) { 327 sp->len = 0; 328 return (0); 329 } 330 331 /* 332 * Use fgetln so that we can handle essentially infinite input data. 333 * Can't use the pointer into the stdio buffer as the process space 334 * because the ungetc() can cause it to move. 335 */ 336 p = fgetln(f, &len); 337 if (ferror(f)) 338 err(FATAL, "%s: %s", fname, strerror(errno ? errno : EIO)); 339 cspace(sp, p, len, spflag); 340 341 linenum++; 342 /* Advance to next non-empty file */ 343 while ((c = getc(f)) == EOF) { 344 (void)fclose(f); 345 files = files->next; 346 if (files == NULL) { 347 lastline = 1; 348 return (1); 349 } 350 if (files->fname == NULL) { 351 f = stdin; 352 fname = "stdin"; 353 } else { 354 fname = files->fname; 355 if ((f = fopen(fname, "r")) == NULL) 356 err(FATAL, "%s: %s", fname, strerror(errno)); 357 } 358 } 359 (void)ungetc(c, f); 360 return (1); 361} 362 363/* 364 * Add a compilation unit to the linked list 365 */ 366static void 367add_compunit(enum e_cut type, char *s) 368{ 369 struct s_compunit *cu; 370 371 cu = xmalloc(sizeof(struct s_compunit)); 372 cu->type = type; 373 cu->s = s; 374 cu->next = NULL; 375 *cu_nextp = cu; 376 cu_nextp = &cu->next; 377} 378 379/* 380 * Add a file to the linked list 381 */ 382static void 383add_file(char *s) 384{ 385 struct s_flist *fp; 386 387 fp = xmalloc(sizeof(struct s_flist)); 388 fp->next = NULL; 389 *fl_nextp = fp; 390 fp->fname = s; 391 fl_nextp = &fp->next; 392} 393