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 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 static char sccsid[] = "@(#)main.c 8.2 (Berkeley) 1/3/94"; 46 #endif /* not lint */ 47 48 #include <sys/types.h> 49 50 #include <errno.h> 51 #include <fcntl.h> 52 #include <locale.h> 53 #include <regex.h> 54 #include <stddef.h> 55 #include <stdio.h> 56 #include <stdlib.h> 57 #include <string.h> 58 #include <unistd.h> 59 60 #include "defs.h" 61 #include "extern.h" 62 63 /* 64 * Linked list of units (strings and files) to be compiled 65 */ 66 struct s_compunit { 67 struct s_compunit *next; 68 enum e_cut {CU_FILE, CU_STRING} type; 69 char *s; /* Pointer to string or fname */ 70 }; 71 72 /* 73 * Linked list pointer to compilation units and pointer to current 74 * next pointer. 75 */ 76 static struct s_compunit *script, **cu_nextp = &script; 77 78 /* 79 * Linked list of files to be processed 80 */ 81 struct s_flist { 82 char *fname; 83 struct s_flist *next; 84 }; 85 86 /* 87 * Linked list pointer to files and pointer to current 88 * next pointer. 89 */ 90 static struct s_flist *files, **fl_nextp = &files; 91 92 int aflag, eflag, nflag; 93 94 /* 95 * Current file and line number; line numbers restart across compilation 96 * units, but span across input files. 97 */ 98 char *fname; /* File name. */ 99 u_long linenum; 100 int lastline; /* TRUE on the last line of the last file */ 101 102 static void add_compunit __P((enum e_cut, char *)); 103 static void add_file __P((char *)); 104 105 int 106 main(argc, argv) 107 int argc; 108 char *argv[]; 109 { 110 int c, fflag; 111 112 (void) setlocale(LC_ALL, ""); 113 114 fflag = 0; 115 while ((c = getopt(argc, argv, "ae:f:n")) != -1) 116 switch (c) { 117 case 'a': 118 aflag = 1; 119 break; 120 case 'e': 121 eflag = 1; 122 add_compunit(CU_STRING, optarg); 123 break; 124 case 'f': 125 fflag = 1; 126 add_compunit(CU_FILE, optarg); 127 break; 128 case 'n': 129 nflag = 1; 130 break; 131 default: 132 case '?': 133 (void)fprintf(stderr, 134 "usage:\tsed script [-an] [file ...]\n\tsed [-an] [-e script] ... [-f script_file] ... [file ...]\n"); 135 exit(1); 136 } 137 argc -= optind; 138 argv += optind; 139 140 /* First usage case; script is the first arg */ 141 if (!eflag && !fflag && *argv) { 142 add_compunit(CU_STRING, *argv); 143 argv++; 144 } 145 146 compile(); 147 148 /* Continue with first and start second usage */ 149 if (*argv) 150 for (; *argv; argv++) 151 add_file(*argv); 152 else 153 add_file(NULL); 154 process(); 155 cfclose(prog, NULL); 156 if (fclose(stdout)) 157 err(FATAL, "stdout: %s", strerror(errno)); 158 exit (0); 159 } 160 161 /* 162 * Like fgets, but go through the chain of compilation units chaining them 163 * together. Empty strings and files are ignored. 164 */ 165 char * 166 cu_fgets(buf, n) 167 char *buf; 168 int n; 169 { 170 static enum {ST_EOF, ST_FILE, ST_STRING} state = ST_EOF; 171 static FILE *f; /* Current open file */ 172 static char *s; /* Current pointer inside string */ 173 static char string_ident[30]; 174 char *p; 175 176 again: 177 switch (state) { 178 case ST_EOF: 179 if (script == NULL) 180 return (NULL); 181 linenum = 0; 182 switch (script->type) { 183 case CU_FILE: 184 if ((f = fopen(script->s, "r")) == NULL) 185 err(FATAL, 186 "%s: %s", script->s, strerror(errno)); 187 fname = script->s; 188 state = ST_FILE; 189 goto again; 190 case CU_STRING: 191 if ((snprintf(string_ident, 192 sizeof(string_ident), "\"%s\"", script->s)) >= 193 sizeof(string_ident) - 1) 194 (void)strcpy(string_ident + 195 sizeof(string_ident) - 6, " ...\""); 196 fname = string_ident; 197 s = script->s; 198 state = ST_STRING; 199 goto again; 200 } 201 case ST_FILE: 202 if ((p = fgets(buf, n, f)) != NULL) { 203 linenum++; 204 if (linenum == 1 && buf[0] == '#' && buf[1] == 'n') 205 nflag = 1; 206 return (p); 207 } 208 script = script->next; 209 (void)fclose(f); 210 state = ST_EOF; 211 goto again; 212 case ST_STRING: 213 if (linenum == 0 && s[0] == '#' && s[1] == 'n') 214 nflag = 1; 215 p = buf; 216 for (;;) { 217 if (n-- <= 1) { 218 *p = '\0'; 219 linenum++; 220 return (buf); 221 } 222 switch (*s) { 223 case '\0': 224 state = ST_EOF; 225 if (s == script->s) { 226 script = script->next; 227 goto again; 228 } else { 229 script = script->next; 230 *p = '\0'; 231 linenum++; 232 return (buf); 233 } 234 case '\n': 235 *p++ = '\n'; 236 *p = '\0'; 237 s++; 238 linenum++; 239 return (buf); 240 default: 241 *p++ = *s++; 242 } 243 } 244 } 245 /* NOTREACHED */ 246 } 247 248 /* 249 * Like fgets, but go through the list of files chaining them together. 250 * Set len to the length of the line. 251 */ 252 int 253 mf_fgets(sp, spflag) 254 SPACE *sp; 255 enum e_spflag spflag; 256 { 257 static FILE *f; /* Current open file */ 258 size_t len; 259 char *p; 260 int c; 261 262 if (f == NULL) 263 /* Advance to first non-empty file */ 264 for (;;) { 265 if (files == NULL) { 266 lastline = 1; 267 return (0); 268 } 269 if (files->fname == NULL) { 270 f = stdin; 271 fname = "stdin"; 272 } else { 273 fname = files->fname; 274 if ((f = fopen(fname, "r")) == NULL) 275 err(FATAL, "%s: %s", 276 fname, strerror(errno)); 277 } 278 if ((c = getc(f)) != EOF) { 279 (void)ungetc(c, f); 280 break; 281 } 282 (void)fclose(f); 283 files = files->next; 284 } 285 286 if (lastline) { 287 sp->len = 0; 288 return (0); 289 } 290 291 /* 292 * Use fgetln so that we can handle essentially infinite input data. 293 * Can't use the pointer into the stdio buffer as the process space 294 * because the ungetc() can cause it to move. 295 */ 296 p = fgetln(f, &len); 297 if (ferror(f)) 298 err(FATAL, "%s: %s", fname, strerror(errno ? errno : EIO)); 299 cspace(sp, p, len, spflag); 300 301 linenum++; 302 /* Advance to next non-empty file */ 303 while ((c = getc(f)) == EOF) { 304 (void)fclose(f); 305 files = files->next; 306 if (files == NULL) { 307 lastline = 1; 308 return (1); 309 } 310 if (files->fname == NULL) { 311 f = stdin; 312 fname = "stdin"; 313 } else { 314 fname = files->fname; 315 if ((f = fopen(fname, "r")) == NULL) 316 err(FATAL, "%s: %s", fname, strerror(errno)); 317 } 318 } 319 (void)ungetc(c, f); 320 return (1); 321 } 322 323 /* 324 * Add a compilation unit to the linked list 325 */ 326 static void 327 add_compunit(type, s) 328 enum e_cut type; 329 char *s; 330 { 331 struct s_compunit *cu; 332 333 cu = xmalloc(sizeof(struct s_compunit)); 334 cu->type = type; 335 cu->s = s; 336 cu->next = NULL; 337 *cu_nextp = cu; 338 cu_nextp = &cu->next; 339 } 340 341 /* 342 * Add a file to the linked list 343 */ 344 static void 345 add_file(s) 346 char *s; 347 { 348 struct s_flist *fp; 349 350 fp = xmalloc(sizeof(struct s_flist)); 351 fp->next = NULL; 352 *fl_nextp = fp; 353 fp->fname = s; 354 fl_nextp = &fp->next; 355 } 356