1 /* $NetBSD: cat.c,v 1.45 2006/10/08 21:52:56 elad Exp $ */ 2 3 /* 4 * Copyright (c) 1989, 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 * Kevin Fall. 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 #if HAVE_NBTOOL_CONFIG_H 36 #include "nbtool_config.h" 37 #endif 38 39 #include <sys/cdefs.h> 40 #if !defined(lint) 41 __COPYRIGHT( 42 "@(#) Copyright (c) 1989, 1993\n\ 43 The Regents of the University of California. All rights reserved.\n"); 44 #if 0 45 static char sccsid[] = "@(#)cat.c 8.2 (Berkeley) 4/27/95"; 46 #else 47 __RCSID("$NetBSD: cat.c,v 1.45 2006/10/08 21:52:56 elad Exp $"); 48 #endif 49 #endif /* not lint */ 50 51 #include <sys/param.h> 52 #include <sys/stat.h> 53 54 #include <ctype.h> 55 #include <err.h> 56 #include <errno.h> 57 #include <fcntl.h> 58 #include <locale.h> 59 #include <stdio.h> 60 #include <stdlib.h> 61 #include <string.h> 62 #include <unistd.h> 63 64 int bflag, eflag, fflag, lflag, nflag, sflag, tflag, vflag; 65 int rval; 66 const char *filename; 67 68 int main(int, char *[]); 69 void cook_args(char *argv[]); 70 void cook_buf(FILE *); 71 void raw_args(char *argv[]); 72 void raw_cat(int); 73 74 int 75 main(int argc, char *argv[]) 76 { 77 int ch; 78 struct flock stdout_lock; 79 80 setprogname(argv[0]); 81 (void)setlocale(LC_ALL, ""); 82 83 while ((ch = getopt(argc, argv, "beflnstuv")) != -1) 84 switch (ch) { 85 case 'b': 86 bflag = nflag = 1; /* -b implies -n */ 87 break; 88 case 'e': 89 eflag = vflag = 1; /* -e implies -v */ 90 break; 91 case 'f': 92 fflag = 1; 93 break; 94 case 'l': 95 lflag = 1; 96 break; 97 case 'n': 98 nflag = 1; 99 break; 100 case 's': 101 sflag = 1; 102 break; 103 case 't': 104 tflag = vflag = 1; /* -t implies -v */ 105 break; 106 case 'u': 107 setbuf(stdout, NULL); 108 break; 109 case 'v': 110 vflag = 1; 111 break; 112 default: 113 case '?': 114 (void)fprintf(stderr, 115 "usage: cat [-beflnstuv] [-] [file ...]\n"); 116 exit(1); 117 /* NOTREACHED */ 118 } 119 argv += optind; 120 121 if (lflag) { 122 stdout_lock.l_len = 0; 123 stdout_lock.l_start = 0; 124 stdout_lock.l_type = F_WRLCK; 125 stdout_lock.l_whence = SEEK_SET; 126 if (fcntl(STDOUT_FILENO, F_SETLKW, &stdout_lock) == -1) 127 err(EXIT_FAILURE, "stdout"); 128 } 129 130 if (bflag || eflag || nflag || sflag || tflag || vflag) 131 cook_args(argv); 132 else 133 raw_args(argv); 134 if (fclose(stdout)) 135 err(1, "stdout"); 136 exit(rval); 137 /* NOTREACHED */ 138 } 139 140 void 141 cook_args(char **argv) 142 { 143 FILE *fp; 144 145 fp = stdin; 146 filename = "stdin"; 147 do { 148 if (*argv) { 149 if (!strcmp(*argv, "-")) 150 fp = stdin; 151 else if ((fp = fopen(*argv, 152 fflag ? "rf" : "r")) == NULL) { 153 warn("%s", *argv); 154 rval = 1; 155 ++argv; 156 continue; 157 } 158 filename = *argv++; 159 } 160 cook_buf(fp); 161 if (fp != stdin) 162 (void)fclose(fp); 163 else 164 clearerr(fp); 165 } while (*argv); 166 } 167 168 void 169 cook_buf(FILE *fp) 170 { 171 int ch, gobble, line, prev; 172 173 line = gobble = 0; 174 for (prev = '\n'; (ch = getc(fp)) != EOF; prev = ch) { 175 if (prev == '\n') { 176 if (ch == '\n') { 177 if (sflag) { 178 if (!gobble && nflag && !bflag) 179 (void)fprintf(stdout, 180 "%6d\t\n", ++line); 181 else if (!gobble && putchar(ch) == EOF) 182 break; 183 gobble = 1; 184 continue; 185 } 186 if (nflag) { 187 if (!bflag) { 188 (void)fprintf(stdout, 189 "%6d\t", ++line); 190 if (ferror(stdout)) 191 break; 192 } else if (eflag) { 193 (void)fprintf(stdout, 194 "%6s\t", ""); 195 if (ferror(stdout)) 196 break; 197 } 198 } 199 } else if (nflag) { 200 (void)fprintf(stdout, "%6d\t", ++line); 201 if (ferror(stdout)) 202 break; 203 } 204 } 205 gobble = 0; 206 if (ch == '\n') { 207 if (eflag) 208 if (putchar('$') == EOF) 209 break; 210 } else if (ch == '\t') { 211 if (tflag) { 212 if (putchar('^') == EOF || putchar('I') == EOF) 213 break; 214 continue; 215 } 216 } else if (vflag) { 217 if (!isascii(ch)) { 218 if (putchar('M') == EOF || putchar('-') == EOF) 219 break; 220 ch = toascii(ch); 221 } 222 if (iscntrl(ch)) { 223 if (putchar('^') == EOF || 224 putchar(ch == '\177' ? '?' : 225 ch | 0100) == EOF) 226 break; 227 continue; 228 } 229 } 230 if (putchar(ch) == EOF) 231 break; 232 } 233 if (ferror(fp)) { 234 warn("%s", filename); 235 rval = 1; 236 clearerr(fp); 237 } 238 if (ferror(stdout)) 239 err(1, "stdout"); 240 } 241 242 void 243 raw_args(char **argv) 244 { 245 int fd; 246 247 fd = fileno(stdin); 248 filename = "stdin"; 249 do { 250 if (*argv) { 251 if (!strcmp(*argv, "-")) 252 fd = fileno(stdin); 253 else if (fflag) { 254 struct stat st; 255 fd = open(*argv, O_RDONLY|O_NONBLOCK, 0); 256 if (fd < 0) 257 goto skip; 258 259 if (fstat(fd, &st) == -1) { 260 close(fd); 261 goto skip; 262 } 263 if (!S_ISREG(st.st_mode)) { 264 close(fd); 265 warnx("%s: not a regular file", *argv); 266 goto skipnomsg; 267 } 268 } 269 else if ((fd = open(*argv, O_RDONLY, 0)) < 0) { 270 skip: 271 warn("%s", *argv); 272 skipnomsg: 273 rval = 1; 274 ++argv; 275 continue; 276 } 277 filename = *argv++; 278 } 279 raw_cat(fd); 280 if (fd != fileno(stdin)) 281 (void)close(fd); 282 } while (*argv); 283 } 284 285 void 286 raw_cat(int rfd) 287 { 288 static char *buf; 289 static char fb_buf[BUFSIZ]; 290 static size_t bsize; 291 292 struct stat sbuf; 293 ssize_t nr, nw, off; 294 int wfd; 295 296 wfd = fileno(stdout); 297 if (buf == NULL) { 298 if (fstat(wfd, &sbuf) == 0) { 299 bsize = sbuf.st_blksize > BUFSIZ ? 300 sbuf.st_blksize : BUFSIZ; 301 buf = malloc(bsize); 302 } 303 if (buf == NULL) { 304 buf = fb_buf; 305 bsize = BUFSIZ; 306 } 307 } 308 while ((nr = read(rfd, buf, bsize)) > 0) 309 for (off = 0; nr; nr -= nw, off += nw) 310 if ((nw = write(wfd, buf + off, (size_t)nr)) < 0) 311 err(1, "stdout"); 312 if (nr < 0) { 313 warn("%s", filename); 314 rval = 1; 315 } 316 } 317