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 37 #if 0 38 #ifndef lint 39 static char const copyright[] = 40 "@(#) Copyright (c) 1989, 1993\n\ 41 The Regents of the University of California. All rights reserved.\n"; 42 #endif /* not lint */ 43 #endif 44 45 #ifndef lint 46 #if 0 47 static char sccsid[] = "@(#)cat.c 8.2 (Berkeley) 4/27/95"; 48 #endif 49 #endif /* not lint */ 50 #include <sys/cdefs.h> 51 __FBSDID("$FreeBSD$"); 52 53 #include <sys/param.h> 54 #include <sys/stat.h> 55 #ifndef NO_UDOM_SUPPORT 56 #include <sys/socket.h> 57 #include <sys/un.h> 58 #include <errno.h> 59 #endif 60 61 #include <ctype.h> 62 #include <err.h> 63 #include <fcntl.h> 64 #include <locale.h> 65 #include <stdio.h> 66 #include <stdlib.h> 67 #include <string.h> 68 #include <unistd.h> 69 #include <stddef.h> 70 71 int bflag, eflag, nflag, sflag, tflag, vflag; 72 int rval; 73 const char *filename; 74 75 static void usage(void); 76 static void scanfiles(char *argv[], int cooked); 77 static void cook_cat(FILE *); 78 static void raw_cat(int); 79 80 #ifndef NO_UDOM_SUPPORT 81 static int udom_open(const char *path, int flags); 82 #endif 83 84 int 85 main(int argc, char *argv[]) 86 { 87 int ch; 88 89 setlocale(LC_CTYPE, ""); 90 91 while ((ch = getopt(argc, argv, "benstuv")) != -1) 92 switch (ch) { 93 case 'b': 94 bflag = nflag = 1; /* -b implies -n */ 95 break; 96 case 'e': 97 eflag = vflag = 1; /* -e implies -v */ 98 break; 99 case 'n': 100 nflag = 1; 101 break; 102 case 's': 103 sflag = 1; 104 break; 105 case 't': 106 tflag = vflag = 1; /* -t implies -v */ 107 break; 108 case 'u': 109 setbuf(stdout, NULL); 110 break; 111 case 'v': 112 vflag = 1; 113 break; 114 default: 115 usage(); 116 } 117 argv += optind; 118 119 if (bflag || eflag || nflag || sflag || tflag || vflag) 120 scanfiles(argv, 1); 121 else 122 scanfiles(argv, 0); 123 if (fclose(stdout)) 124 err(1, "stdout"); 125 exit(rval); 126 /* NOTREACHED */ 127 } 128 129 static void 130 usage(void) 131 { 132 fprintf(stderr, "usage: cat [-benstuv] [file ...]\n"); 133 exit(1); 134 /* NOTREACHED */ 135 } 136 137 static void 138 scanfiles(char *argv[], int cooked) 139 { 140 int i = 0; 141 char *path; 142 FILE *fp; 143 144 while ((path = argv[i]) != NULL || i == 0) { 145 int fd; 146 147 if (path == NULL || strcmp(path, "-") == 0) { 148 filename = "stdin"; 149 fd = STDIN_FILENO; 150 } else { 151 filename = path; 152 fd = open(path, O_RDONLY); 153 #ifndef NO_UDOM_SUPPORT 154 if (fd < 0 && errno == EOPNOTSUPP) 155 fd = udom_open(path, O_RDONLY); 156 #endif 157 } 158 if (fd < 0) { 159 warn("%s", path); 160 rval = 1; 161 } else if (cooked) { 162 if (fd == STDIN_FILENO) 163 cook_cat(stdin); 164 else { 165 fp = fdopen(fd, "r"); 166 cook_cat(fp); 167 fclose(fp); 168 } 169 } else { 170 raw_cat(fd); 171 if (fd != STDIN_FILENO) 172 close(fd); 173 } 174 if (path == NULL) 175 break; 176 ++i; 177 } 178 } 179 180 static void 181 cook_cat(FILE *fp) 182 { 183 int ch, gobble, line, prev; 184 185 /* Reset EOF condition on stdin. */ 186 if (fp == stdin && feof(stdin)) 187 clearerr(stdin); 188 189 line = gobble = 0; 190 for (prev = '\n'; (ch = getc(fp)) != EOF; prev = ch) { 191 if (prev == '\n') { 192 if (sflag) { 193 if (ch == '\n') { 194 if (gobble) 195 continue; 196 gobble = 1; 197 } else 198 gobble = 0; 199 } 200 if (nflag && (!bflag || ch != '\n')) { 201 (void)fprintf(stdout, "%6d\t", ++line); 202 if (ferror(stdout)) 203 break; 204 } 205 } 206 if (ch == '\n') { 207 if (eflag && 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) && !isprint(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 = 1; 235 clearerr(fp); 236 } 237 if (ferror(stdout)) 238 err(1, "stdout"); 239 } 240 241 static void 242 raw_cat(int rfd) 243 { 244 int off, wfd; 245 ssize_t nr, nw; 246 static size_t bsize; 247 static char *buf = NULL; 248 struct stat sbuf; 249 250 wfd = fileno(stdout); 251 if (buf == NULL) { 252 if (fstat(wfd, &sbuf)) 253 err(1, "%s", filename); 254 bsize = MAX(sbuf.st_blksize, 1024); 255 if ((buf = malloc(bsize)) == NULL) 256 err(1, "buffer"); 257 } 258 while ((nr = read(rfd, buf, bsize)) > 0) 259 for (off = 0; nr; nr -= nw, off += nw) 260 if ((nw = write(wfd, buf + off, (size_t)nr)) < 0) 261 err(1, "stdout"); 262 if (nr < 0) { 263 warn("%s", filename); 264 rval = 1; 265 } 266 } 267 268 #ifndef NO_UDOM_SUPPORT 269 270 static int 271 udom_open(const char *path, int flags) 272 { 273 struct sockaddr_un sou; 274 int fd; 275 unsigned int len; 276 277 bzero(&sou, sizeof(sou)); 278 279 /* 280 * Construct the unix domain socket address and attempt to connect 281 */ 282 fd = socket(AF_UNIX, SOCK_STREAM, 0); 283 if (fd >= 0) { 284 sou.sun_family = AF_UNIX; 285 if ((len = strlcpy(sou.sun_path, path, 286 sizeof(sou.sun_path))) >= sizeof(sou.sun_path)) { 287 errno = ENAMETOOLONG; 288 return (-1); 289 } 290 len = offsetof(struct sockaddr_un, sun_path[len+1]); 291 292 if (connect(fd, (void *)&sou, len) < 0) { 293 close(fd); 294 fd = -1; 295 } 296 } 297 298 /* 299 * handle the open flags by shutting down appropriate directions 300 */ 301 if (fd >= 0) { 302 switch(flags & O_ACCMODE) { 303 case O_RDONLY: 304 if (shutdown(fd, SHUT_WR) == -1) 305 perror("cat"); 306 break; 307 case O_WRONLY: 308 if (shutdown(fd, SHUT_RD) == -1) 309 perror("cat"); 310 break; 311 default: 312 break; 313 } 314 } 315 return(fd); 316 } 317 318 #endif 319