main.c revision 1.10
1 /* $NetBSD: main.c,v 1.10 1997/10/19 23:05:14 lukem 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 1.10 1997/10/19 23:05:14 lukem 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; 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:n")) != -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 default: 137 case '?': 138 (void)fprintf(stderr, 139 "usage:\tsed script [-an] [file ...]\n\tsed [-an] [-e script] ... [-f script_file] ... [file ...]\n"); 140 exit(1); 141 } 142 argc -= optind; 143 argv += optind; 144 145 /* First usage case; script is the first arg */ 146 if (!eflag && !fflag && *argv) { 147 add_compunit(CU_STRING, *argv); 148 argv++; 149 } 150 151 compile(); 152 153 /* Continue with first and start second usage */ 154 if (*argv) 155 for (; *argv; argv++) 156 add_file(*argv); 157 else 158 add_file(NULL); 159 process(); 160 cfclose(prog, NULL); 161 if (fclose(stdout)) 162 err(FATAL, "stdout: %s", strerror(errno)); 163 exit (0); 164 } 165 166 /* 167 * Like fgets, but go through the chain of compilation units chaining them 168 * together. Empty strings and files are ignored. 169 */ 170 char * 171 cu_fgets(buf, n) 172 char *buf; 173 int n; 174 { 175 static enum {ST_EOF, ST_FILE, ST_STRING} state = ST_EOF; 176 static FILE *f; /* Current open file */ 177 static char *s; /* Current pointer inside string */ 178 static char string_ident[30]; 179 char *p; 180 181 again: 182 switch (state) { 183 case ST_EOF: 184 if (script == NULL) 185 return (NULL); 186 linenum = 0; 187 switch (script->type) { 188 case CU_FILE: 189 if ((f = fopen(script->s, "r")) == NULL) 190 err(FATAL, 191 "%s: %s", script->s, strerror(errno)); 192 fname = script->s; 193 state = ST_FILE; 194 goto again; 195 case CU_STRING: 196 if ((snprintf(string_ident, 197 sizeof(string_ident), "\"%s\"", script->s)) >= 198 sizeof(string_ident) - 1) 199 (void)strcpy(string_ident + 200 sizeof(string_ident) - 6, " ...\""); 201 fname = string_ident; 202 s = script->s; 203 state = ST_STRING; 204 goto again; 205 } 206 case ST_FILE: 207 if ((p = fgets(buf, n, f)) != NULL) { 208 linenum++; 209 if (linenum == 1 && buf[0] == '#' && buf[1] == 'n') 210 nflag = 1; 211 return (p); 212 } 213 script = script->next; 214 (void)fclose(f); 215 state = ST_EOF; 216 goto again; 217 case ST_STRING: 218 if (linenum == 0 && s[0] == '#' && s[1] == 'n') 219 nflag = 1; 220 p = buf; 221 for (;;) { 222 if (n-- <= 1) { 223 *p = '\0'; 224 linenum++; 225 return (buf); 226 } 227 switch (*s) { 228 case '\0': 229 state = ST_EOF; 230 if (s == script->s) { 231 script = script->next; 232 goto again; 233 } else { 234 script = script->next; 235 *p = '\0'; 236 linenum++; 237 return (buf); 238 } 239 case '\n': 240 *p++ = '\n'; 241 *p = '\0'; 242 s++; 243 linenum++; 244 return (buf); 245 default: 246 *p++ = *s++; 247 } 248 } 249 } 250 /* NOTREACHED */ 251 return (NULL); 252 } 253 254 /* 255 * Like fgets, but go through the list of files chaining them together. 256 * Set len to the length of the line. 257 */ 258 int 259 mf_fgets(sp, spflag) 260 SPACE *sp; 261 enum e_spflag spflag; 262 { 263 static FILE *f; /* Current open file */ 264 size_t len; 265 char *p; 266 int c; 267 268 if (f == NULL) 269 /* Advance to first non-empty file */ 270 for (;;) { 271 if (files == NULL) { 272 lastline = 1; 273 return (0); 274 } 275 if (files->fname == NULL) { 276 f = stdin; 277 fname = "stdin"; 278 } else { 279 fname = files->fname; 280 if ((f = fopen(fname, "r")) == NULL) 281 err(FATAL, "%s: %s", 282 fname, strerror(errno)); 283 } 284 if ((c = getc(f)) != EOF) { 285 (void)ungetc(c, f); 286 break; 287 } 288 (void)fclose(f); 289 files = files->next; 290 } 291 292 if (lastline) { 293 sp->len = 0; 294 return (0); 295 } 296 297 /* 298 * Use fgetln so that we can handle essentially infinite input data. 299 * Can't use the pointer into the stdio buffer as the process space 300 * because the ungetc() can cause it to move. 301 */ 302 p = fgetln(f, &len); 303 if (ferror(f)) 304 err(FATAL, "%s: %s", fname, strerror(errno ? errno : EIO)); 305 cspace(sp, p, len, spflag); 306 307 linenum++; 308 /* Advance to next non-empty file */ 309 while ((c = getc(f)) == EOF) { 310 (void)fclose(f); 311 files = files->next; 312 if (files == NULL) { 313 lastline = 1; 314 return (1); 315 } 316 if (files->fname == NULL) { 317 f = stdin; 318 fname = "stdin"; 319 } else { 320 fname = files->fname; 321 if ((f = fopen(fname, "r")) == NULL) 322 err(FATAL, "%s: %s", fname, strerror(errno)); 323 } 324 } 325 (void)ungetc(c, f); 326 return (1); 327 } 328 329 /* 330 * Add a compilation unit to the linked list 331 */ 332 static void 333 add_compunit(type, s) 334 enum e_cut type; 335 char *s; 336 { 337 struct s_compunit *cu; 338 339 cu = xmalloc(sizeof(struct s_compunit)); 340 cu->type = type; 341 cu->s = s; 342 cu->next = NULL; 343 *cu_nextp = cu; 344 cu_nextp = &cu->next; 345 } 346 347 /* 348 * Add a file to the linked list 349 */ 350 static void 351 add_file(s) 352 char *s; 353 { 354 struct s_flist *fp; 355 356 fp = xmalloc(sizeof(struct s_flist)); 357 fp->next = NULL; 358 *fl_nextp = fp; 359 fp->fname = s; 360 fl_nextp = &fp->next; 361 } 362
Indexes created Tue Sep 23 02:09:52 GMT 2025