1 /* $NetBSD: cat.c,v 1.46 2007/01/13 11:51:59 cbiere 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 1.46 2007/01/13 11:51:59 cbiere 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(EXIT_FAILURE); 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(EXIT_FAILURE, "stdout"); 136 return (rval); 137 } 138 139 void 140 cook_args(char **argv) 141 { 142 FILE *fp; 143 144 fp = stdin; 145 filename = "stdin"; 146 do { 147 if (*argv) { 148 if (!strcmp(*argv, "-")) 149 fp = stdin; 150 else if ((fp = fopen(*argv, 151 fflag ? "rf" : "r")) == NULL) { 152 warn("%s", *argv); 153 rval = EXIT_FAILURE; 154 ++argv; 155 continue; 156 } 157 filename = *argv++; 158 } 159 cook_buf(fp); 160 if (fp != stdin) 161 (void)fclose(fp); 162 else 163 clearerr(fp); 164 } while (*argv); 165 } 166 167 void 168 cook_buf(FILE *fp) 169 { 170 int ch, gobble, line, prev; 171 172 line = gobble = 0; 173 for (prev = '\n'; (ch = getc(fp)) != EOF; prev = ch) { 174 if (prev == '\n') { 175 if (ch == '\n') { 176 if (sflag) { 177 if (!gobble && nflag && !bflag) 178 (void)fprintf(stdout, 179 "%6d\t\n", ++line); 180 else if (!gobble && putchar(ch) == EOF) 181 break; 182 gobble = 1; 183 continue; 184 } 185 if (nflag) { 186 if (!bflag) { 187 (void)fprintf(stdout, 188 "%6d\t", ++line); 189 if (ferror(stdout)) 190 break; 191 } else if (eflag) { 192 (void)fprintf(stdout, 193 "%6s\t", ""); 194 if (ferror(stdout)) 195 break; 196 } 197 } 198 } else if (nflag) { 199 (void)fprintf(stdout, "%6d\t", ++line); 200 if (ferror(stdout)) 201 break; 202 } 203 } 204 gobble = 0; 205 if (ch == '\n') { 206 if (eflag) 207 if (putchar('$') == EOF) 208 break; 209 } else if (ch == '\t') { 210 if (tflag) { 211 if (putchar('^') == EOF || putchar('I') == EOF) 212 break; 213 continue; 214 } 215 } else if (vflag) { 216 if (!isascii(ch)) { 217 if (putchar('M') == EOF || putchar('-') == EOF) 218 break; 219 ch = toascii(ch); 220 } 221 if (iscntrl(ch)) { 222 if (putchar('^') == EOF || 223 putchar(ch == '\177' ? '?' : 224 ch | 0100) == EOF) 225 break; 226 continue; 227 } 228 } 229 if (putchar(ch) == EOF) 230 break; 231 } 232 if (ferror(fp)) { 233 warn("%s", filename); 234 rval = EXIT_FAILURE; 235 clearerr(fp); 236 } 237 if (ferror(stdout)) 238 err(EXIT_FAILURE, "stdout"); 239 } 240 241 void 242 raw_args(char **argv) 243 { 244 int fd; 245 246 fd = fileno(stdin); 247 filename = "stdin"; 248 do { 249 if (*argv) { 250 if (!strcmp(*argv, "-")) 251 fd = fileno(stdin); 252 else if (fflag) { 253 struct stat st; 254 fd = open(*argv, O_RDONLY|O_NONBLOCK, 0); 255 if (fd < 0) 256 goto skip; 257 258 if (fstat(fd, &st) == -1) { 259 close(fd); 260 goto skip; 261 } 262 if (!S_ISREG(st.st_mode)) { 263 close(fd); 264 warnx("%s: not a regular file", *argv); 265 goto skipnomsg; 266 } 267 } 268 else if ((fd = open(*argv, O_RDONLY, 0)) < 0) { 269 skip: 270 warn("%s", *argv); 271 skipnomsg: 272 rval = EXIT_FAILURE; 273 ++argv; 274 continue; 275 } 276 filename = *argv++; 277 } 278 raw_cat(fd); 279 if (fd != fileno(stdin)) 280 (void)close(fd); 281 } while (*argv); 282 } 283 284 void 285 raw_cat(int rfd) 286 { 287 static char *buf; 288 static char fb_buf[BUFSIZ]; 289 static size_t bsize; 290 291 ssize_t nr, nw, off; 292 int wfd; 293 294 wfd = fileno(stdout); 295 if (buf == NULL) { 296 struct stat sbuf; 297 298 if (fstat(wfd, &sbuf) == 0 && 299 sbuf.st_blksize > sizeof(fb_buf)) { 300 bsize = sbuf.st_blksize; 301 buf = malloc(bsize); 302 } 303 if (buf == NULL) { 304 bsize = sizeof(fb_buf); 305 buf = fb_buf; 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(EXIT_FAILURE, "stdout"); 312 if (nr < 0) { 313 warn("%s", filename); 314 rval = EXIT_FAILURE; 315 } 316 } 317