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 #ifndef lint 38 static char const copyright[] = 39 "@(#) Copyright (c) 1989, 1993\n\ 40 The Regents of the University of California. All rights reserved.\n"; 41 #endif /* not lint */ 42 43 #ifndef lint 44 #if 0 45 static char sccsid[] = "@(#)cat.c 8.2 (Berkeley) 4/27/95"; 46 #endif 47 static const char rcsid[] = 48 "$FreeBSD$"; 49 #endif /* not lint */ 50 51 #include <sys/param.h> 52 #include <sys/stat.h> 53 #ifndef NO_UDOM_SUPPORT 54 #include <sys/socket.h> 55 #include <sys/un.h> 56 #include <errno.h> 57 #endif 58 59 #include <ctype.h> 60 #include <err.h> 61 #include <fcntl.h> 62 #include <locale.h> 63 #include <stdio.h> 64 #include <stdlib.h> 65 #include <string.h> 66 #include <unistd.h> 67 #include <stddef.h> 68 69 int bflag, eflag, nflag, sflag, tflag, vflag; 70 int rval; 71 const char *filename; 72 73 int main __P((int argc, char *argv[])); 74 75 static void scanfiles __P((char **argv, int cooked)); 76 static void cook_cat __P((FILE *)); 77 static void raw_cat __P((int)); 78 79 #ifndef NO_UDOM_SUPPORT 80 static int udom_open __P((const char *path, int flags, int modes)); 81 #endif 82 83 int 84 main(argc, argv) 85 int argc; 86 char *argv[]; 87 { 88 int ch; 89 90 setlocale(LC_CTYPE, ""); 91 92 while ((ch = getopt(argc, argv, "benstuv")) != -1) 93 switch (ch) { 94 case 'b': 95 bflag = nflag = 1; /* -b implies -n */ 96 break; 97 case 'e': 98 eflag = vflag = 1; /* -e implies -v */ 99 break; 100 case 'n': 101 nflag = 1; 102 break; 103 case 's': 104 sflag = 1; 105 break; 106 case 't': 107 tflag = vflag = 1; /* -t implies -v */ 108 break; 109 case 'u': 110 setbuf(stdout, NULL); 111 break; 112 case 'v': 113 vflag = 1; 114 break; 115 default: 116 (void)fprintf(stderr, 117 "usage: cat [-benstuv] [-] [file ...]\n"); 118 exit(1); 119 } 120 argv += optind; 121 122 if (bflag || eflag || nflag || sflag || tflag || vflag) 123 scanfiles(argv, 1); 124 else 125 scanfiles(argv, 0); 126 if (fclose(stdout)) 127 err(1, "stdout"); 128 exit(rval); 129 } 130 131 void 132 scanfiles(argv, cooked) 133 char **argv; 134 int cooked; 135 { 136 int i = 0; 137 char *path; 138 139 while ((path = argv[i]) != NULL || i == 0) { 140 int fd; 141 142 if (path == NULL || strcmp(path, "-") == 0) { 143 filename = "stdin"; 144 fd = 0; 145 } else { 146 filename = path; 147 fd = open(path, O_RDONLY); 148 #ifndef NO_UDOM_SUPPORT 149 if (fd < 0 && errno == EOPNOTSUPP) 150 fd = udom_open(path, O_RDONLY, 0); 151 #endif 152 } 153 if (fd < 0) { 154 warn("%s", path); 155 rval = 1; 156 } else if (cooked) { 157 FILE *fp = fdopen(fd, "r"); 158 cook_cat(fp); 159 fclose(fp); 160 } else { 161 raw_cat(fd); 162 close(fd); 163 } 164 if (path == NULL) 165 break; 166 ++i; 167 } 168 } 169 170 static void 171 cook_cat(fp) 172 register FILE *fp; 173 { 174 register int ch, gobble, line, prev; 175 176 line = gobble = 0; 177 for (prev = '\n'; (ch = getc(fp)) != EOF; prev = ch) { 178 if (prev == '\n') { 179 if (ch == '\n') { 180 if (sflag) { 181 if (!gobble && putchar(ch) == EOF) 182 break; 183 gobble = 1; 184 continue; 185 } 186 if (nflag && !bflag) { 187 (void)fprintf(stdout, "%6d\t", ++line); 188 if (ferror(stdout)) 189 break; 190 } 191 } else if (nflag) { 192 (void)fprintf(stdout, "%6d\t", ++line); 193 if (ferror(stdout)) 194 break; 195 } 196 } 197 gobble = 0; 198 if (ch == '\n') { 199 if (eflag) 200 if (putchar('$') == EOF) 201 break; 202 } else if (ch == '\t') { 203 if (tflag) { 204 if (putchar('^') == EOF || putchar('I') == EOF) 205 break; 206 continue; 207 } 208 } else if (vflag) { 209 if (!isascii(ch) && !isprint(ch)) { 210 if (putchar('M') == EOF || putchar('-') == EOF) 211 break; 212 ch = toascii(ch); 213 } 214 if (iscntrl(ch)) { 215 if (putchar('^') == EOF || 216 putchar(ch == '\177' ? '?' : 217 ch | 0100) == EOF) 218 break; 219 continue; 220 } 221 } 222 if (putchar(ch) == EOF) 223 break; 224 } 225 if (ferror(fp)) { 226 warn("%s", filename); 227 rval = 1; 228 clearerr(fp); 229 } 230 if (ferror(stdout)) 231 err(1, "stdout"); 232 } 233 234 static void 235 raw_cat(rfd) 236 register int rfd; 237 { 238 register int off, wfd; 239 ssize_t nr, nw; 240 static size_t bsize; 241 static char *buf; 242 struct stat sbuf; 243 244 wfd = fileno(stdout); 245 if (buf == NULL) { 246 if (fstat(wfd, &sbuf)) 247 err(1, "%s", filename); 248 bsize = MAX(sbuf.st_blksize, 1024); 249 if ((buf = malloc(bsize)) == NULL) 250 err(1, "buffer"); 251 } 252 while ((nr = read(rfd, buf, bsize)) > 0) 253 for (off = 0; nr; nr -= nw, off += nw) 254 if ((nw = write(wfd, buf + off, (size_t)nr)) < 0) 255 err(1, "stdout"); 256 if (nr < 0) { 257 warn("%s", filename); 258 rval = 1; 259 } 260 } 261 262 #ifndef NO_UDOM_SUPPORT 263 264 static int 265 udom_open(path, flags, modes) 266 const char *path; 267 int flags; 268 int modes; 269 { 270 struct sockaddr_un sou; 271 int fd; 272 int len; 273 274 bzero(&sou, sizeof(sou)); 275 276 /* 277 * Construct the unix domain socket address and attempt to connect 278 */ 279 if ((fd = socket(AF_UNIX, SOCK_STREAM, 0)) >= 0) { 280 sou.sun_family = AF_UNIX; 281 snprintf(sou.sun_path, sizeof(sou.sun_path), "%s", path); 282 len = strlen(sou.sun_path); 283 len = offsetof(struct sockaddr_un, sun_path[len+1]); 284 285 if (connect(fd, (void *)&sou, len) < 0) { 286 close(fd); 287 fd = -1; 288 } 289 } 290 291 /* 292 * handle the open flags by shutting down appropriate directions 293 */ 294 if (fd >= 0) { 295 switch(flags & O_ACCMODE) { 296 case O_RDONLY: 297 shutdown(fd, SHUT_WR); 298 break; 299 case O_WRONLY: 300 shutdown(fd, SHUT_RD); 301 break; 302 default: 303 break; 304 } 305 } 306 return(fd); 307 } 308 309 #endif 310 311