1 /* $NetBSD: cat.c,v 1.31 2002/05/09 02:19:42 simonb 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. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 */ 38 39 #include <sys/cdefs.h> 40 #ifndef lint 41 __COPYRIGHT( 42 "@(#) Copyright (c) 1989, 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[] = "@(#)cat.c 8.2 (Berkeley) 4/27/95"; 49 #else 50 __RCSID("$NetBSD: cat.c,v 1.31 2002/05/09 02:19:42 simonb Exp $"); 51 #endif 52 #endif /* not lint */ 53 54 #include <sys/param.h> 55 #include <sys/stat.h> 56 57 #include <ctype.h> 58 #include <err.h> 59 #include <errno.h> 60 #include <fcntl.h> 61 #include <locale.h> 62 #include <stdio.h> 63 #include <stdlib.h> 64 #include <string.h> 65 #include <unistd.h> 66 67 int bflag, eflag, fflag, nflag, sflag, tflag, vflag; 68 int rval; 69 const char *filename; 70 71 int main(int, char *[]); 72 void cook_args(char *argv[]); 73 void cook_buf(FILE *); 74 void raw_args(char *argv[]); 75 void raw_cat(int); 76 77 int 78 main(int argc, char *argv[]) 79 { 80 int ch; 81 82 setprogname(argv[0]); 83 (void)setlocale(LC_ALL, ""); 84 85 while ((ch = getopt(argc, argv, "befnstuv")) != -1) 86 switch (ch) { 87 case 'b': 88 bflag = nflag = 1; /* -b implies -n */ 89 break; 90 case 'e': 91 eflag = vflag = 1; /* -e implies -v */ 92 break; 93 case 'f': 94 fflag = 1; 95 break; 96 case 'n': 97 nflag = 1; 98 break; 99 case 's': 100 sflag = 1; 101 break; 102 case 't': 103 tflag = vflag = 1; /* -t implies -v */ 104 break; 105 case 'u': 106 setbuf(stdout, NULL); 107 break; 108 case 'v': 109 vflag = 1; 110 break; 111 default: 112 case '?': 113 (void)fprintf(stderr, 114 "usage: cat [-befnstuv] [-] [file ...]\n"); 115 exit(1); 116 /* NOTREACHED */ 117 } 118 argv += optind; 119 120 if (bflag || eflag || nflag || sflag || tflag || vflag) 121 cook_args(argv); 122 else 123 raw_args(argv); 124 if (fclose(stdout)) 125 err(1, "stdout"); 126 exit(rval); 127 /* NOTREACHED */ 128 } 129 130 void 131 cook_args(char **argv) 132 { 133 FILE *fp; 134 135 fp = stdin; 136 filename = "stdin"; 137 do { 138 if (*argv) { 139 if (!strcmp(*argv, "-")) 140 fp = stdin; 141 else if ((fp = fopen(*argv, 142 fflag ? "rf" : "r")) == NULL) { 143 warn("%s", *argv); 144 rval = 1; 145 ++argv; 146 continue; 147 } 148 filename = *argv++; 149 } 150 cook_buf(fp); 151 if (fp != stdin) 152 (void)fclose(fp); 153 } while (*argv); 154 } 155 156 void 157 cook_buf(FILE *fp) 158 { 159 int ch, gobble, line, prev; 160 161 line = gobble = 0; 162 for (prev = '\n'; (ch = getc(fp)) != EOF; prev = ch) { 163 if (prev == '\n') { 164 if (ch == '\n') { 165 if (sflag) { 166 if (!gobble && putchar(ch) == EOF) 167 break; 168 gobble = 1; 169 continue; 170 } 171 if (nflag) { 172 if (!bflag) { 173 (void)fprintf(stdout, 174 "%6d\t", ++line); 175 if (ferror(stdout)) 176 break; 177 } else if (eflag) { 178 (void)fprintf(stdout, 179 "%6s\t", ""); 180 if (ferror(stdout)) 181 break; 182 } 183 } 184 } else if (nflag) { 185 (void)fprintf(stdout, "%6d\t", ++line); 186 if (ferror(stdout)) 187 break; 188 } 189 } 190 gobble = 0; 191 if (ch == '\n') { 192 if (eflag) 193 if (putchar('$') == EOF) 194 break; 195 } else if (ch == '\t') { 196 if (tflag) { 197 if (putchar('^') == EOF || putchar('I') == EOF) 198 break; 199 continue; 200 } 201 } else if (vflag) { 202 if (!isascii(ch)) { 203 if (putchar('M') == EOF || putchar('-') == EOF) 204 break; 205 ch = toascii(ch); 206 } 207 if (iscntrl(ch)) { 208 if (putchar('^') == EOF || 209 putchar(ch == '\177' ? '?' : 210 ch | 0100) == EOF) 211 break; 212 continue; 213 } 214 } 215 if (putchar(ch) == EOF) 216 break; 217 } 218 if (ferror(fp)) { 219 warn("%s", filename); 220 rval = 1; 221 clearerr(fp); 222 } 223 if (ferror(stdout)) 224 err(1, "stdout"); 225 } 226 227 void 228 raw_args(char **argv) 229 { 230 int fd; 231 232 fd = fileno(stdin); 233 filename = "stdin"; 234 do { 235 if (*argv) { 236 if (!strcmp(*argv, "-")) 237 fd = fileno(stdin); 238 else if (fflag) { 239 struct stat st; 240 fd = open(*argv, O_RDONLY|O_NONBLOCK, 0); 241 if (fd < 0) 242 goto skip; 243 244 if (fstat(fd, &st) == -1) { 245 close(fd); 246 goto skip; 247 } 248 if (!S_ISREG(st.st_mode)) { 249 close(fd); 250 errno = EFTYPE; 251 goto skip; 252 } 253 } 254 else if ((fd = open(*argv, O_RDONLY, 0)) < 0) { 255 skip: 256 warn("%s", *argv); 257 rval = 1; 258 ++argv; 259 continue; 260 } 261 filename = *argv++; 262 } 263 raw_cat(fd); 264 if (fd != fileno(stdin)) 265 (void)close(fd); 266 } while (*argv); 267 } 268 269 void 270 raw_cat(int rfd) 271 { 272 static char *buf; 273 static char fb_buf[BUFSIZ]; 274 static size_t bsize; 275 276 struct stat sbuf; 277 ssize_t nr, nw, off; 278 int wfd; 279 280 wfd = fileno(stdout); 281 if (buf == NULL) { 282 if (fstat(wfd, &sbuf) == 0) { 283 bsize = MAX(sbuf.st_blksize, BUFSIZ); 284 buf = malloc(bsize); 285 } 286 if (buf == NULL) { 287 buf = fb_buf; 288 bsize = BUFSIZ; 289 } 290 } 291 while ((nr = read(rfd, buf, bsize)) > 0) 292 for (off = 0; nr; nr -= nw, off += nw) 293 if ((nw = write(wfd, buf + off, (size_t)nr)) < 0) 294 err(1, "stdout"); 295 if (nr < 0) { 296 warn("%s", filename); 297 rval = 1; 298 } 299 } 300