1 /* $NetBSD: main.c,v 1.12 2002/05/17 17:27:12 wiz Exp $ */ 2 3 /*- 4 * Copyright (c) 1992 Diomidis Spinellis. 5 * Copyright (c) 1992, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * Diomidis Spinellis of Imperial College, University of London. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the University of 22 * California, Berkeley and its contributors. 23 * 4. Neither the name of the University nor the names of its contributors 24 * may be used to endorse or promote products derived from this software 25 * without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 37 * SUCH DAMAGE. 38 */ 39 40 #include <sys/cdefs.h> 41 #ifndef lint 42 __COPYRIGHT("@(#) Copyright (c) 1992, 1993\n\ 43 The Regents of the University of California. All rights reserved.\n"); 44 #endif /* not lint */ 45 46 #ifndef lint 47 #if 0 48 static char sccsid[] = "@(#)main.c 8.2 (Berkeley) 1/3/94"; 49 #else 50 __RCSID("$NetBSD: main.c,v 1.12 2002/05/17 17:27:12 wiz Exp $"); 51 #endif 52 #endif /* not lint */ 53 54 #include <sys/types.h> 55 56 #include <ctype.h> 57 #include <errno.h> 58 #include <fcntl.h> 59 #include <regex.h> 60 #include <stddef.h> 61 #include <stdio.h> 62 #include <stdlib.h> 63 #include <string.h> 64 #include <unistd.h> 65 66 #include "defs.h" 67 #include "extern.h" 68 69 /* 70 * Linked list of units (strings and files) to be compiled 71 */ 72 struct s_compunit { 73 struct s_compunit *next; 74 enum e_cut {CU_FILE, CU_STRING} type; 75 char *s; /* Pointer to string or fname */ 76 }; 77 78 /* 79 * Linked list pointer to compilation units and pointer to current 80 * next pointer. 81 */ 82 static struct s_compunit *script, **cu_nextp = &script; 83 84 /* 85 * Linked list of files to be processed 86 */ 87 struct s_flist { 88 char *fname; 89 struct s_flist *next; 90 }; 91 92 /* 93 * Linked list pointer to files and pointer to current 94 * next pointer. 95 */ 96 static struct s_flist *files, **fl_nextp = &files; 97 98 int aflag, eflag, nflag, ere; 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 int main __P((int, char **)); 111 112 int 113 main(argc, argv) 114 int argc; 115 char *argv[]; 116 { 117 int c, fflag; 118 119 fflag = 0; 120 while ((c = getopt(argc, argv, "ae:f:nE")) != -1) 121 switch (c) { 122 case 'a': 123 aflag = 1; 124 break; 125 case 'e': 126 eflag = 1; 127 add_compunit(CU_STRING, optarg); 128 break; 129 case 'f': 130 fflag = 1; 131 add_compunit(CU_FILE, optarg); 132 break; 133 case 'n': 134 nflag = 1; 135 break; 136 case 'E': 137 ere = REG_EXTENDED; 138 break; 139 default: 140 case '?': 141 (void)fprintf(stderr, 142 "usage:\t%s script [-anE] [file ...]\n\tsed [-an] [-e script] ... [-f script_file] ... [file ...]\n", 143 getprogname()); 144 exit(1); 145 } 146 argc -= optind; 147 argv += optind; 148 149 /* First usage case; script is the first arg */ 150 if (!eflag && !fflag && *argv) { 151 add_compunit(CU_STRING, *argv); 152 argv++; 153 } 154 155 compile(); 156 157 /* Continue with first and start second usage */ 158 if (*argv) 159 for (; *argv; argv++) 160 add_file(*argv); 161 else 162 add_file(NULL); 163 process(); 164 cfclose(prog, NULL); 165 if (fclose(stdout)) 166 err(FATAL, "stdout: %s", strerror(errno)); 167 exit (0); 168 } 169 170 /* 171 * Like fgets, but go through the chain of compilation units chaining them 172 * together. Empty strings and files are ignored. 173 */ 174 char * 175 cu_fgets(buf, n) 176 char *buf; 177 int n; 178 { 179 static enum {ST_EOF, ST_FILE, ST_STRING} state = ST_EOF; 180 static FILE *f; /* Current open file */ 181 static char *s; /* Current pointer inside string */ 182 static char string_ident[30]; 183 char *p; 184 185 again: 186 switch (state) { 187 case ST_EOF: 188 if (script == NULL) 189 return (NULL); 190 linenum = 0; 191 switch (script->type) { 192 case CU_FILE: 193 if ((f = fopen(script->s, "r")) == NULL) 194 err(FATAL, 195 "%s: %s", script->s, strerror(errno)); 196 fname = script->s; 197 state = ST_FILE; 198 goto again; 199 case CU_STRING: 200 if ((snprintf(string_ident, 201 sizeof(string_ident), "\"%s\"", script->s)) >= 202 sizeof(string_ident) - 1) 203 (void)strcpy(string_ident + 204 sizeof(string_ident) - 6, " ...\""); 205 fname = string_ident; 206 s = script->s; 207 state = ST_STRING; 208 goto again; 209 } 210 case ST_FILE: 211 if ((p = fgets(buf, n, f)) != NULL) { 212 linenum++; 213 if (linenum == 1 && buf[0] == '#' && buf[1] == 'n') 214 nflag = 1; 215 return (p); 216 } 217 script = script->next; 218 (void)fclose(f); 219 state = ST_EOF; 220 goto again; 221 case ST_STRING: 222 if (linenum == 0 && s[0] == '#' && s[1] == 'n') 223 nflag = 1; 224 p = buf; 225 for (;;) { 226 if (n-- <= 1) { 227 *p = '\0'; 228 linenum++; 229 return (buf); 230 } 231 switch (*s) { 232 case '\0': 233 state = ST_EOF; 234 if (s == script->s) { 235 script = script->next; 236 goto again; 237 } else { 238 script = script->next; 239 *p = '\0'; 240 linenum++; 241 return (buf); 242 } 243 case '\n': 244 *p++ = '\n'; 245 *p = '\0'; 246 s++; 247 linenum++; 248 return (buf); 249 default: 250 *p++ = *s++; 251 } 252 } 253 } 254 /* NOTREACHED */ 255 return (NULL); 256 } 257 258 /* 259 * Like fgets, but go through the list of files chaining them together. 260 * Set len to the length of the line. 261 */ 262 int 263 mf_fgets(sp, spflag) 264 SPACE *sp; 265 enum e_spflag spflag; 266 { 267 static FILE *f; /* Current open file */ 268 size_t len; 269 char *p; 270 int c; 271 272 if (f == NULL) 273 /* Advance to first non-empty file */ 274 for (;;) { 275 if (files == NULL) { 276 lastline = 1; 277 return (0); 278 } 279 if (files->fname == NULL) { 280 f = stdin; 281 fname = "stdin"; 282 } else { 283 fname = files->fname; 284 if ((f = fopen(fname, "r")) == NULL) 285 err(FATAL, "%s: %s", 286 fname, strerror(errno)); 287 } 288 if ((c = getc(f)) != EOF) { 289 (void)ungetc(c, f); 290 break; 291 } 292 (void)fclose(f); 293 files = files->next; 294 } 295 296 if (lastline) { 297 sp->len = 0; 298 return (0); 299 } 300 301 /* 302 * Use fgetln so that we can handle essentially infinite input data. 303 * Can't use the pointer into the stdio buffer as the process space 304 * because the ungetc() can cause it to move. 305 */ 306 p = fgetln(f, &len); 307 if (ferror(f)) 308 err(FATAL, "%s: %s", fname, strerror(errno ? errno : EIO)); 309 cspace(sp, p, len, spflag); 310 311 linenum++; 312 /* Advance to next non-empty file */ 313 while ((c = getc(f)) == EOF) { 314 (void)fclose(f); 315 files = files->next; 316 if (files == NULL) { 317 lastline = 1; 318 return (1); 319 } 320 if (files->fname == NULL) { 321 f = stdin; 322 fname = "stdin"; 323 } else { 324 fname = files->fname; 325 if ((f = fopen(fname, "r")) == NULL) 326 err(FATAL, "%s: %s", fname, strerror(errno)); 327 } 328 } 329 (void)ungetc(c, f); 330 return (1); 331 } 332 333 /* 334 * Add a compilation unit to the linked list 335 */ 336 static void 337 add_compunit(type, s) 338 enum e_cut type; 339 char *s; 340 { 341 struct s_compunit *cu; 342 343 cu = xmalloc(sizeof(struct s_compunit)); 344 cu->type = type; 345 cu->s = s; 346 cu->next = NULL; 347 *cu_nextp = cu; 348 cu_nextp = &cu->next; 349 } 350 351 /* 352 * Add a file to the linked list 353 */ 354 static void 355 add_file(s) 356 char *s; 357 { 358 struct s_flist *fp; 359 360 fp = xmalloc(sizeof(struct s_flist)); 361 fp->next = NULL; 362 *fl_nextp = fp; 363 fp->fname = s; 364 fl_nextp = &fp->next; 365 } 366