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 1.5 2003/09/28 14:39:13 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 int bflag, eflag, nflag, sflag, tflag, vflag; 61 int rval; 62 const char *filename; 63 64 int main (int argc, char *argv[]); 65 66 static void scanfiles (char **argv, int cooked); 67 static void cook_cat (FILE *); 68 static void raw_cat (int); 69 70 #ifndef NO_UDOM_SUPPORT 71 static int udom_open (const char *path, int flags); 72 #endif 73 74 int 75 main(int argc, char **argv) 76 { 77 int ch; 78 79 setlocale(LC_CTYPE, ""); 80 81 while ((ch = getopt(argc, argv, "benstuv")) != -1) 82 switch (ch) { 83 case 'b': 84 bflag = nflag = 1; /* -b implies -n */ 85 break; 86 case 'e': 87 eflag = vflag = 1; /* -e implies -v */ 88 break; 89 case 'n': 90 nflag = 1; 91 break; 92 case 's': 93 sflag = 1; 94 break; 95 case 't': 96 tflag = vflag = 1; /* -t implies -v */ 97 break; 98 case 'u': 99 setbuf(stdout, NULL); 100 break; 101 case 'v': 102 vflag = 1; 103 break; 104 default: 105 fprintf(stderr, 106 "usage: cat [-benstuv] [-] [file ...]\n"); 107 exit(1); 108 /* NOTREACHED */ 109 } 110 argv += optind; 111 112 if (bflag || eflag || nflag || sflag || tflag || vflag) 113 scanfiles(argv, 1); 114 else 115 scanfiles(argv, 0); 116 if (fclose(stdout)) 117 err(1, "stdout"); 118 exit(rval); 119 /* NOTREACHED */ 120 } 121 122 void 123 scanfiles(char **argv, int cooked) 124 { 125 int i = 0; 126 char *path; 127 FILE *fp; 128 129 while ((path = argv[i]) != NULL || i == 0) { 130 int fd; 131 132 if (path == NULL || strcmp(path, "-") == 0) { 133 filename = "stdin"; 134 fd = STDIN_FILENO; 135 } else { 136 filename = path; 137 fd = open(path, O_RDONLY); 138 #ifndef NO_UDOM_SUPPORT 139 if (fd < 0 && errno == EOPNOTSUPP) 140 fd = udom_open(path, O_RDONLY); 141 #endif 142 } 143 if (fd < 0) { 144 warn("%s", path); 145 rval = 1; 146 } else if (cooked) { 147 if (fd == STDIN_FILENO) 148 cook_cat(stdin); 149 else { 150 fp = fdopen(fd, "r"); 151 cook_cat(fp); 152 fclose(fp); 153 } 154 } else { 155 raw_cat(fd); 156 if (fd != STDIN_FILENO) 157 close(fd); 158 } 159 if (path == NULL) 160 break; 161 ++i; 162 } 163 } 164 165 static void 166 cook_cat(register FILE *fp) 167 { 168 register int ch, gobble, line, prev; 169 170 /* Reset EOF condition on stdin. */ 171 if (fp == stdin && feof(stdin)) 172 clearerr(stdin); 173 174 line = gobble = 0; 175 for (prev = '\n'; (ch = getc(fp)) != EOF; prev = ch) { 176 if (prev == '\n') { 177 if (ch == '\n') { 178 if (sflag) { 179 if (!gobble && putchar(ch) == EOF) 180 break; 181 gobble = 1; 182 continue; 183 } 184 if (nflag && !bflag) { 185 fprintf(stdout, "%6d\t", ++line); 186 if (ferror(stdout)) 187 break; 188 } 189 } else if (nflag) { 190 fprintf(stdout, "%6d\t", ++line); 191 if (ferror(stdout)) 192 break; 193 } 194 } 195 gobble = 0; 196 if (ch == '\n') { 197 if (eflag) 198 if (putchar('$') == EOF) 199 break; 200 } else if (ch == '\t') { 201 if (tflag) { 202 if (putchar('^') == EOF || putchar('I') == EOF) 203 break; 204 continue; 205 } 206 } else if (vflag) { 207 if (!isascii(ch) && !isprint(ch)) { 208 if (putchar('M') == EOF || putchar('-') == EOF) 209 break; 210 ch = toascii(ch); 211 } 212 if (iscntrl(ch)) { 213 if (putchar('^') == EOF || 214 putchar(ch == '\177' ? '?' : 215 ch | 0100) == EOF) 216 break; 217 continue; 218 } 219 } 220 if (putchar(ch) == EOF) 221 break; 222 } 223 if (ferror(fp)) { 224 warn("%s", filename); 225 rval = 1; 226 clearerr(fp); 227 } 228 if (ferror(stdout)) 229 err(1, "stdout"); 230 } 231 232 static void 233 raw_cat(register int rfd) 234 { 235 register int off, wfd; 236 ssize_t nr, nw; 237 static size_t bsize; 238 static char *buf = NULL; 239 struct stat sbuf; 240 241 wfd = fileno(stdout); 242 if (buf == NULL) { 243 if (fstat(wfd, &sbuf)) 244 err(1, "%s", filename); 245 bsize = MAX(sbuf.st_blksize, 1024); 246 if ((buf = malloc(bsize)) == NULL) 247 err(1, "buffer"); 248 } 249 while ((nr = read(rfd, buf, bsize)) > 0) 250 for (off = 0; nr; nr -= nw, off += nw) 251 if ((nw = write(wfd, buf + off, (size_t)nr)) < 0) 252 err(1, "stdout"); 253 if (nr < 0) { 254 warn("%s", filename); 255 rval = 1; 256 } 257 } 258 259 #ifndef NO_UDOM_SUPPORT 260 261 static int 262 udom_open(const char *path, int flags) 263 { 264 struct sockaddr_un sou; 265 int fd; 266 unsigned int len; 267 268 bzero(&sou, sizeof(sou)); 269 270 /* 271 * Construct the unix domain socket address and attempt to connect 272 */ 273 fd = socket(AF_UNIX, SOCK_STREAM, 0); 274 if (fd >= 0) { 275 sou.sun_family = AF_UNIX; 276 snprintf(sou.sun_path, sizeof(sou.sun_path), "%s", path); 277 len = strlen(sou.sun_path); 278 len = offsetof(struct sockaddr_un, sun_path[len+1]); 279 280 if (connect(fd, (void *)&sou, len) < 0) { 281 close(fd); 282 fd = -1; 283 } 284 } 285 286 /* 287 * handle the open flags by shutting down appropriate directions 288 */ 289 if (fd >= 0) { 290 switch(flags & O_ACCMODE) { 291 case O_RDONLY: 292 if (shutdown(fd, SHUT_WR) == -1) 293 perror("cat"); 294 break; 295 case O_WRONLY: 296 if (shutdown(fd, SHUT_RD) == -1) 297 perror("cat"); 298 break; 299 default: 300 break; 301 } 302 } 303 return(fd); 304 } 305 306 #endif 307