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 <ctype.h> 51 #include <errno.h> 52 #include <fcntl.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 fflag = 0; 113 while ((c = getopt(argc, argv, "ae:f:n")) != EOF) 114 switch (c) { 115 case 'a': 116 aflag = 1; 117 break; 118 case 'e': 119 eflag = 1; 120 add_compunit(CU_STRING, optarg); 121 break; 122 case 'f': 123 fflag = 1; 124 add_compunit(CU_FILE, optarg); 125 break; 126 case 'n': 127 nflag = 1; 128 break; 129 default: 130 case '?': 131 (void)fprintf(stderr, 132 "usage:\tsed script [-an] [file ...]\n\tsed [-an] [-e script] ... [-f scipt_file] ... [file ...]\n"); 133 exit(1); 134 } 135 argc -= optind; 136 argv += optind; 137 138 /* First usage case; script is the first arg */ 139 if (!eflag && !fflag && *argv) { 140 add_compunit(CU_STRING, *argv); 141 argv++; 142 } 143 144 compile(); 145 146 /* Continue with first and start second usage */ 147 if (*argv) 148 for (; *argv; argv++) 149 add_file(*argv); 150 else 151 add_file(NULL); 152 process(); 153 cfclose(prog, NULL); 154 if (fclose(stdout)) 155 err(FATAL, "stdout: %s", strerror(errno)); 156 exit (0); 157 } 158 159 /* 160 * Like fgets, but go through the chain of compilation units chaining them 161 * together. Empty strings and files are ignored. 162 */ 163 char * 164 cu_fgets(buf, n) 165 char *buf; 166 int n; 167 { 168 static enum {ST_EOF, ST_FILE, ST_STRING} state = ST_EOF; 169 static FILE *f; /* Current open file */ 170 static char *s; /* Current pointer inside string */ 171 static char string_ident[30]; 172 char *p; 173 174 again: 175 switch (state) { 176 case ST_EOF: 177 if (script == NULL) 178 return (NULL); 179 linenum = 0; 180 switch (script->type) { 181 case CU_FILE: 182 if ((f = fopen(script->s, "r")) == NULL) 183 err(FATAL, 184 "%s: %s", script->s, strerror(errno)); 185 fname = script->s; 186 state = ST_FILE; 187 goto again; 188 case CU_STRING: 189 if ((snprintf(string_ident, 190 sizeof(string_ident), "\"%s\"", script->s)) >= 191 sizeof(string_ident) - 1) 192 (void)strcpy(string_ident + 193 sizeof(string_ident) - 6, " ...\""); 194 fname = string_ident; 195 s = script->s; 196 state = ST_STRING; 197 goto again; 198 } 199 case ST_FILE: 200 if ((p = fgets(buf, n, f)) != NULL) { 201 linenum++; 202 if (linenum == 1 && buf[0] == '#' && buf[1] == 'n') 203 nflag = 1; 204 return (p); 205 } 206 script = script->next; 207 (void)fclose(f); 208 state = ST_EOF; 209 goto again; 210 case ST_STRING: 211 if (linenum == 0 && s[0] == '#' && s[1] == 'n') 212 nflag = 1; 213 p = buf; 214 for (;;) { 215 if (n-- <= 1) { 216 *p = '\0'; 217 linenum++; 218 return (buf); 219 } 220 switch (*s) { 221 case '\0': 222 state = ST_EOF; 223 if (s == script->s) { 224 script = script->next; 225 goto again; 226 } else { 227 script = script->next; 228 *p = '\0'; 229 linenum++; 230 return (buf); 231 } 232 case '\n': 233 *p++ = '\n'; 234 *p = '\0'; 235 s++; 236 linenum++; 237 return (buf); 238 default: 239 *p++ = *s++; 240 } 241 } 242 } 243 /* NOTREACHED */ 244 } 245 246 /* 247 * Like fgets, but go through the list of files chaining them together. 248 * Set len to the length of the line. 249 */ 250 int 251 mf_fgets(sp, spflag) 252 SPACE *sp; 253 enum e_spflag spflag; 254 { 255 static FILE *f; /* Current open file */ 256 size_t len; 257 char c, *p; 258 259 if (f == NULL) 260 /* Advance to first non-empty file */ 261 for (;;) { 262 if (files == NULL) { 263 lastline = 1; 264 return (0); 265 } 266 if (files->fname == NULL) { 267 f = stdin; 268 fname = "stdin"; 269 } else { 270 fname = files->fname; 271 if ((f = fopen(fname, "r")) == NULL) 272 err(FATAL, "%s: %s", 273 fname, strerror(errno)); 274 } 275 if ((c = getc(f)) != EOF) { 276 (void)ungetc(c, f); 277 break; 278 } 279 (void)fclose(f); 280 files = files->next; 281 } 282 283 if (lastline) { 284 sp->len = 0; 285 return (0); 286 } 287 288 /* 289 * Use fgetln so that we can handle essentially infinite input data. 290 * Can't use the pointer into the stdio buffer as the process space 291 * because the ungetc() can cause it to move. 292 */ 293 p = fgetln(f, &len); 294 if (ferror(f)) 295 err(FATAL, "%s: %s", fname, strerror(errno ? errno : EIO)); 296 cspace(sp, p, len, spflag); 297 298 linenum++; 299 /* Advance to next non-empty file */ 300 while ((c = getc(f)) == EOF) { 301 (void)fclose(f); 302 files = files->next; 303 if (files == NULL) { 304 lastline = 1; 305 return (1); 306 } 307 if (files->fname == NULL) { 308 f = stdin; 309 fname = "stdin"; 310 } else { 311 fname = files->fname; 312 if ((f = fopen(fname, "r")) == NULL) 313 err(FATAL, "%s: %s", fname, strerror(errno)); 314 } 315 } 316 (void)ungetc(c, f); 317 return (1); 318 } 319 320 /* 321 * Add a compilation unit to the linked list 322 */ 323 static void 324 add_compunit(type, s) 325 enum e_cut type; 326 char *s; 327 { 328 struct s_compunit *cu; 329 330 cu = xmalloc(sizeof(struct s_compunit)); 331 cu->type = type; 332 cu->s = s; 333 cu->next = NULL; 334 *cu_nextp = cu; 335 cu_nextp = &cu->next; 336 } 337 338 /* 339 * Add a file to the linked list 340 */ 341 static void 342 add_file(s) 343 char *s; 344 { 345 struct s_flist *fp; 346 347 fp = xmalloc(sizeof(struct s_flist)); 348 fp->next = NULL; 349 *fl_nextp = fp; 350 fp->fname = s; 351 fl_nextp = &fp->next; 352 } 353