1 /* 2 * Copyright (c) 1989, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Kevin Fall. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#) Copyright (c) 1989, 1993 The Regents of the University of California. All rights reserved. 37 * @(#)cat.c 8.2 (Berkeley) 4/27/95 38 * $FreeBSD: src/bin/cat/cat.c,v 1.14.2.8 2002/06/29 05:09:26 tjr Exp $ 39 * $DragonFly: src/bin/cat/cat.c,v 1.10 2004/07/27 16:21:52 hmp Exp $ 40 */ 41 42 #include <sys/param.h> 43 #include <sys/stat.h> 44 #ifndef NO_UDOM_SUPPORT 45 #include <sys/socket.h> 46 #include <sys/un.h> 47 #include <errno.h> 48 #endif 49 50 #include <ctype.h> 51 #include <err.h> 52 #include <fcntl.h> 53 #include <locale.h> 54 #include <stdio.h> 55 #include <stdlib.h> 56 #include <string.h> 57 #include <unistd.h> 58 #include <stddef.h> 59 60 static int bflag, eflag, nflag, sflag, tflag, vflag; 61 static int rval; 62 static const char *filename; 63 64 static void scanfiles (char **, int); 65 static void cook_cat (FILE *); 66 static void raw_cat (int); 67 68 #ifndef NO_UDOM_SUPPORT 69 static int udom_open (const char *path, int flags); 70 #endif 71 72 static void 73 usage(void) 74 { 75 fprintf(stderr, 76 "usage: cat [-benstuv] [-] [file ...]\n"); 77 exit(EXIT_FAILURE); 78 } 79 80 int 81 main(int argc, char **argv) 82 { 83 int ch; 84 85 setlocale(LC_CTYPE, ""); 86 87 while ((ch = getopt(argc, argv, "benstuv")) != -1) 88 switch (ch) { 89 case 'b': 90 bflag = nflag = 1; /* -b implies -n */ 91 break; 92 case 'e': 93 eflag = vflag = 1; /* -e implies -v */ 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 usage(); 112 /* NOTREACHED */ 113 } 114 argv += optind; 115 116 if (bflag || eflag || nflag || sflag || tflag || vflag) 117 scanfiles(argv, 1); 118 else 119 scanfiles(argv, 0); 120 if (fclose(stdout)) 121 err(1, "stdout"); 122 exit(rval); 123 /* NOTREACHED */ 124 } 125 126 static void 127 scanfiles(char **argv, int cooked) 128 { 129 int i = 0; 130 char *path; 131 FILE *fp; 132 133 while ((path = argv[i]) != NULL || i == 0) { 134 int fd; 135 136 if (path == NULL || strcmp(path, "-") == 0) { 137 filename = "stdin"; 138 fd = STDIN_FILENO; 139 } else { 140 filename = path; 141 fd = open(path, O_RDONLY); 142 #ifndef NO_UDOM_SUPPORT 143 if (fd < 0 && errno == EOPNOTSUPP) 144 fd = udom_open(path, O_RDONLY); 145 #endif 146 } 147 if (fd < 0) { 148 warn("%s", path); 149 rval = 1; 150 } else if (cooked) { 151 if (fd == STDIN_FILENO) 152 cook_cat(stdin); 153 else { 154 fp = fdopen(fd, "r"); 155 cook_cat(fp); 156 fclose(fp); 157 } 158 } else { 159 raw_cat(fd); 160 if (fd != STDIN_FILENO) 161 close(fd); 162 } 163 if (path == NULL) 164 break; 165 ++i; 166 } 167 } 168 169 static void 170 cook_cat(FILE *fp) 171 { 172 int ch, gobble, line, prev; 173 174 /* Reset EOF condition on stdin. */ 175 if (fp == stdin && feof(stdin)) 176 clearerr(stdin); 177 178 line = gobble = 0; 179 for (prev = '\n'; (ch = getc(fp)) != EOF; prev = ch) { 180 if (prev == '\n') { 181 if (ch == '\n') { 182 if (sflag) { 183 if (!gobble && putchar(ch) == EOF) 184 break; 185 gobble = 1; 186 continue; 187 } 188 if (nflag && !bflag) { 189 fprintf(stdout, "%6d\t", ++line); 190 if (ferror(stdout)) 191 break; 192 } 193 } else if (nflag) { 194 fprintf(stdout, "%6d\t", ++line); 195 if (ferror(stdout)) 196 break; 197 } 198 } 199 gobble = 0; 200 if (ch == '\n') { 201 if (eflag) 202 if (putchar('$') == EOF) 203 break; 204 } else if (ch == '\t') { 205 if (tflag) { 206 if (putchar('^') == EOF || putchar('I') == EOF) 207 break; 208 continue; 209 } 210 } else if (vflag) { 211 if (!isascii(ch) && !isprint(ch)) { 212 if (putchar('M') == EOF || putchar('-') == EOF) 213 break; 214 ch = toascii(ch); 215 } 216 if (iscntrl(ch)) { 217 if (putchar('^') == EOF || 218 putchar(ch == '\177' ? '?' : 219 ch | 0100) == EOF) 220 break; 221 continue; 222 } 223 } 224 if (putchar(ch) == EOF) 225 break; 226 } 227 if (ferror(fp)) { 228 warn("%s", filename); 229 rval = 1; 230 clearerr(fp); 231 } 232 if (ferror(stdout)) 233 err(1, "stdout"); 234 } 235 236 static void 237 raw_cat(int rfd) 238 { 239 int off, wfd; 240 ssize_t nr, nw; 241 static size_t bsize; 242 static char *buf = NULL; 243 struct stat sbuf; 244 245 wfd = fileno(stdout); 246 if (buf == NULL) { 247 if (fstat(wfd, &sbuf)) 248 err(1, "%s", filename); 249 bsize = MAX(sbuf.st_blksize, 1024); 250 if ((buf = malloc(bsize)) == NULL) 251 err(1, "buffer"); 252 } 253 while ((nr = read(rfd, buf, bsize)) > 0) 254 for (off = 0; nr; nr -= nw, off += nw) 255 if ((nw = write(wfd, buf + off, (size_t)nr)) < 0) 256 err(1, "stdout"); 257 if (nr < 0) { 258 warn("%s", filename); 259 rval = 1; 260 } 261 } 262 263 #ifndef NO_UDOM_SUPPORT 264 265 static int 266 udom_open(const char *path, int flags) 267 { 268 struct sockaddr_un sou; 269 int fd; 270 unsigned int len; 271 272 bzero(&sou, sizeof(sou)); 273 274 /* 275 * Construct the unix domain socket address and attempt to connect 276 */ 277 fd = socket(AF_UNIX, SOCK_STREAM, 0); 278 if (fd >= 0) { 279 sou.sun_family = AF_UNIX; 280 snprintf(sou.sun_path, sizeof(sou.sun_path), "%s", path); 281 len = strlen(sou.sun_path); 282 len = offsetof(struct sockaddr_un, sun_path[len+1]); 283 284 if (connect(fd, (void *)&sou, len) < 0) { 285 close(fd); 286 fd = -1; 287 } 288 } 289 290 /* 291 * handle the open flags by shutting down appropriate directions 292 */ 293 if (fd >= 0) { 294 switch (flags & O_ACCMODE) { 295 case O_RDONLY: 296 if (shutdown(fd, SHUT_WR) == -1) 297 warn(NULL); 298 break; 299 case O_WRONLY: 300 if (shutdown(fd, SHUT_RD) == -1) 301 warn(NULL); 302 break; 303 default: 304 break; 305 } 306 } 307 return(fd); 308 } 309 310 #endif 311