1 /* $NetBSD: cat.c,v 1.27 2001/07/29 22:40:57 wiz 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 1.27 2001/07/29 22:40:57 wiz 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 (void)setlocale(LC_ALL, ""); 83 84 while ((ch = getopt(argc, argv, "befnstuv")) != -1) 85 switch (ch) { 86 case 'b': 87 bflag = nflag = 1; /* -b implies -n */ 88 break; 89 case 'e': 90 eflag = vflag = 1; /* -e implies -v */ 91 break; 92 case 'f': 93 fflag = 1; 94 break; 95 case 'n': 96 nflag = 1; 97 break; 98 case 's': 99 sflag = 1; 100 break; 101 case 't': 102 tflag = vflag = 1; /* -t implies -v */ 103 break; 104 case 'u': 105 setbuf(stdout, NULL); 106 break; 107 case 'v': 108 vflag = 1; 109 break; 110 default: 111 case '?': 112 (void)fprintf(stderr, 113 "usage: cat [-befnstuv] [-] [file ...]\n"); 114 exit(1); 115 /* NOTREACHED */ 116 } 117 argv += optind; 118 119 if (bflag || eflag || nflag || sflag || tflag || vflag) 120 cook_args(argv); 121 else 122 raw_args(argv); 123 if (fclose(stdout)) 124 err(1, "stdout"); 125 exit(rval); 126 /* NOTREACHED */ 127 } 128 129 void 130 cook_args(char **argv) 131 { 132 FILE *fp; 133 134 fp = stdin; 135 filename = "stdin"; 136 do { 137 if (*argv) { 138 if (!strcmp(*argv, "-")) 139 fp = stdin; 140 else if ((fp = fopen(*argv, 141 fflag ? "rf" : "r")) == NULL) { 142 warn("%s", *argv); 143 rval = 1; 144 ++argv; 145 continue; 146 } 147 filename = *argv++; 148 } 149 cook_buf(fp); 150 if (fp != stdin) 151 (void)fclose(fp); 152 } while (*argv); 153 } 154 155 void 156 cook_buf(FILE *fp) 157 { 158 int ch, gobble, line, prev; 159 160 line = gobble = 0; 161 for (prev = '\n'; (ch = getc(fp)) != EOF; prev = ch) { 162 if (prev == '\n') { 163 if (ch == '\n') { 164 if (sflag) { 165 if (!gobble && putchar(ch) == EOF) 166 break; 167 gobble = 1; 168 continue; 169 } 170 if (nflag) { 171 if (!bflag) { 172 (void)fprintf(stdout, 173 "%6d\t", ++line); 174 if (ferror(stdout)) 175 break; 176 } else if (eflag) { 177 (void)fprintf(stdout, 178 "%6s\t", ""); 179 if (ferror(stdout)) 180 break; 181 } 182 } 183 } else if (nflag) { 184 (void)fprintf(stdout, "%6d\t", ++line); 185 if (ferror(stdout)) 186 break; 187 } 188 } 189 gobble = 0; 190 if (ch == '\n') { 191 if (eflag) 192 if (putchar('$') == EOF) 193 break; 194 } else if (ch == '\t') { 195 if (tflag) { 196 if (putchar('^') == EOF || putchar('I') == EOF) 197 break; 198 continue; 199 } 200 } else if (vflag) { 201 if (!isascii(ch)) { 202 if (putchar('M') == EOF || putchar('-') == EOF) 203 break; 204 ch = toascii(ch); 205 } 206 if (iscntrl(ch)) { 207 if (putchar('^') == EOF || 208 putchar(ch == '\177' ? '?' : 209 ch | 0100) == EOF) 210 break; 211 continue; 212 } 213 } 214 if (putchar(ch) == EOF) 215 break; 216 } 217 if (ferror(fp)) { 218 warn("%s", filename); 219 rval = 1; 220 clearerr(fp); 221 } 222 if (ferror(stdout)) 223 err(1, "stdout"); 224 } 225 226 void 227 raw_args(char **argv) 228 { 229 int fd; 230 231 fd = fileno(stdin); 232 filename = "stdin"; 233 do { 234 if (*argv) { 235 if (!strcmp(*argv, "-")) 236 fd = fileno(stdin); 237 else if (fflag) { 238 struct stat st; 239 fd = open(*argv, O_RDONLY|O_NONBLOCK, 0); 240 if (fd < 0) 241 goto skip; 242 243 if (fstat(fd, &st) == -1) { 244 close(fd); 245 goto skip; 246 } 247 if (!S_ISREG(st.st_mode)) { 248 close(fd); 249 errno = EFTYPE; 250 goto skip; 251 } 252 } 253 else if ((fd = open(*argv, O_RDONLY, 0)) < 0) { 254 skip: 255 warn("%s", *argv); 256 rval = 1; 257 ++argv; 258 continue; 259 } 260 filename = *argv++; 261 } 262 raw_cat(fd); 263 if (fd != fileno(stdin)) 264 (void)close(fd); 265 } while (*argv); 266 } 267 268 void 269 raw_cat(int rfd) 270 { 271 int wfd; 272 static char *buf; 273 static char fb_buf[BUFSIZ]; 274 struct stat sbuf; 275 static size_t bsize; 276 ssize_t nr, nw, off; 277 278 wfd = fileno(stdout); 279 if (buf == NULL) { 280 if (fstat(wfd, &sbuf) == 0) { 281 bsize = MIN(sbuf.st_blksize, SSIZE_MAX); 282 bsize = MAX(bsize, BUFSIZ); 283 buf = malloc(bsize); 284 } 285 if (buf == NULL) { 286 buf = fb_buf; 287 bsize = BUFSIZ; 288 } 289 } 290 while ((nr = read(rfd, buf, bsize)) > 0) 291 for (off = 0; nr; nr -= nw, off += nw) 292 if ((nw = write(wfd, buf + off, (size_t)nr)) < 0) 293 err(1, "stdout"); 294 if (nr < 0) { 295 warn("%s", filename); 296 rval = 1; 297 } 298 } 299