| 1 | /* |
| 2 | * Copyright (c) 1989 The Regents of the University of California. |
| 3 | * 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 are permitted |
| 9 | * provided that the above copyright notice and this paragraph are |
| 10 | * duplicated in all such forms and that any documentation, |
| 11 | * advertising materials, and other materials related to such |
| 12 | * distribution and use acknowledge that the software was developed |
| 13 | * by the University of California, Berkeley. The name of the |
| 14 | * University may not be used to endorse or promote products derived |
| 15 | * from this software without specific prior written permission. |
| 16 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR |
| 17 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED |
| 18 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. |
| 19 | */ |
| 20 | |
| 21 | #ifndef lint |
| 22 | char copyright[] = |
| 23 | "@(#) Copyright (c) 1989 The Regents of the University of California.\n\ |
| 24 | All rights reserved.\n"; |
| 25 | #endif /* not lint */ |
| 26 | |
| 27 | #ifndef lint |
| 28 | static char sccsid[] = "@(#)cat.c 5.7 (Berkeley) %G%"; |
| 29 | #endif /* not lint */ |
| 30 | |
| 31 | #include <sys/param.h> |
| 32 | #include <sys/stat.h> |
| 33 | #include <sys/file.h> |
| 34 | #include <stdio.h> |
| 35 | #include <ctype.h> |
| 36 | |
| 37 | int bflag, eflag, nflag, sflag, tflag, vflag; |
| 38 | int rval; |
| 39 | char *filename; |
| 40 | |
| 41 | main(argc, argv) |
| 42 | int argc; |
| 43 | char **argv; |
| 44 | { |
| 45 | extern int errno, optind; |
| 46 | int ch; |
| 47 | char *strerror(); |
| 48 | |
| 49 | while ((ch = getopt(argc, argv, "-benstuv")) != EOF) |
| 50 | switch (ch) { |
| 51 | case '-': |
| 52 | --optind; |
| 53 | goto done; |
| 54 | case 'b': |
| 55 | bflag = nflag = 1; /* -b implies -n */ |
| 56 | break; |
| 57 | case 'e': |
| 58 | eflag = vflag = 1; /* -e implies -v */ |
| 59 | break; |
| 60 | case 'n': |
| 61 | nflag = 1; |
| 62 | break; |
| 63 | case 's': |
| 64 | sflag = 1; |
| 65 | break; |
| 66 | case 't': |
| 67 | tflag = vflag = 1; /* -t implies -v */ |
| 68 | break; |
| 69 | case 'u': |
| 70 | setbuf(stdout, (char *)NULL); |
| 71 | break; |
| 72 | case 'v': |
| 73 | vflag = 1; |
| 74 | break; |
| 75 | case '?': |
| 76 | (void)fprintf(stderr, |
| 77 | "usage: cat [-benstuv] [-] [file ...]\n"); |
| 78 | exit(1); |
| 79 | } |
| 80 | done: argv += optind; |
| 81 | |
| 82 | if (bflag || eflag || nflag || sflag || tflag || vflag) |
| 83 | cook_args(argv); |
| 84 | else |
| 85 | raw_args(argv); |
| 86 | exit(rval); |
| 87 | } |
| 88 | |
| 89 | cook_args(argv) |
| 90 | char **argv; |
| 91 | { |
| 92 | register FILE *fp; |
| 93 | |
| 94 | fp = stdin; |
| 95 | filename = "-"; |
| 96 | do { |
| 97 | if (*argv) { |
| 98 | if (!strcmp(*argv, "-")) |
| 99 | fp = stdin; |
| 100 | else if (!(fp = fopen(*argv, "r"))) { |
| 101 | (void)fprintf(stderr, |
| 102 | "cat: %s: %s\n", *argv, strerror(errno)); |
| 103 | rval = 1; |
| 104 | ++argv; |
| 105 | continue; |
| 106 | } |
| 107 | filename = *argv++; |
| 108 | } |
| 109 | cook_buf(fp); |
| 110 | if (fp != stdin) |
| 111 | (void)fclose(fp); |
| 112 | } while (*argv); |
| 113 | } |
| 114 | |
| 115 | cook_buf(fp) |
| 116 | register FILE *fp; |
| 117 | { |
| 118 | register int ch, gobble, line, prev; |
| 119 | |
| 120 | line = gobble = 0; |
| 121 | for (prev = '\n'; (ch = getc(fp)) != EOF; prev = ch) { |
| 122 | if (prev == '\n') { |
| 123 | if (ch == '\n') { |
| 124 | if (sflag) { |
| 125 | if (!gobble && putc(ch, stdout) == EOF) |
| 126 | break; |
| 127 | gobble = 1; |
| 128 | continue; |
| 129 | } |
| 130 | if (nflag && !bflag) { |
| 131 | (void)fprintf(stdout, "%6d\t", ++line); |
| 132 | if (ferror(stdout)) |
| 133 | break; |
| 134 | } |
| 135 | } else if (nflag) { |
| 136 | (void)fprintf(stdout, "%6d\t", ++line); |
| 137 | if (ferror(stdout)) |
| 138 | break; |
| 139 | } |
| 140 | } |
| 141 | gobble = 0; |
| 142 | if (ch == '\n') { |
| 143 | if (eflag) |
| 144 | if (putc('$', stdout) == EOF) |
| 145 | break; |
| 146 | } else if (ch == '\t') { |
| 147 | if (tflag) { |
| 148 | if (putc('^', stdout) == EOF || |
| 149 | putc('I', stdout) == EOF) |
| 150 | break; |
| 151 | continue; |
| 152 | } |
| 153 | } else if (vflag) { |
| 154 | if (ch > 0177) { |
| 155 | if (putc('M', stdout) == EOF || |
| 156 | putc('-', stdout) == EOF) |
| 157 | break; |
| 158 | ch &= 0177; |
| 159 | } |
| 160 | if (iscntrl(ch)) { |
| 161 | if (putc('^', stdout) == EOF || |
| 162 | putc(ch == '\177' ? '?' : |
| 163 | ch | 0100, stdout) == EOF) |
| 164 | break; |
| 165 | continue; |
| 166 | } |
| 167 | } |
| 168 | if (putc(ch, stdout) == EOF) |
| 169 | break; |
| 170 | } |
| 171 | if (ferror(fp)) { |
| 172 | (void)fprintf(stderr, "cat: %s: read error\n", filename); |
| 173 | rval = 1; |
| 174 | } |
| 175 | if (ferror(stdout)) { |
| 176 | clearerr(stdout); |
| 177 | (void)fprintf(stderr, "cat: stdout: write error\n"); |
| 178 | rval = 1; |
| 179 | } |
| 180 | } |
| 181 | |
| 182 | raw_args(argv) |
| 183 | char **argv; |
| 184 | { |
| 185 | register int fd; |
| 186 | |
| 187 | fd = fileno(stdin); |
| 188 | filename = "-"; |
| 189 | do { |
| 190 | if (*argv) { |
| 191 | if (!strcmp(*argv, "-")) |
| 192 | fd = fileno(stdin); |
| 193 | else if ((fd = open(*argv, O_RDONLY, 0)) < 0) { |
| 194 | (void)fprintf(stderr, "cat: %s: %s\n", |
| 195 | *argv, strerror(errno)); |
| 196 | rval = 1; |
| 197 | ++argv; |
| 198 | continue; |
| 199 | } |
| 200 | filename = *argv++; |
| 201 | } |
| 202 | rval |= raw_cat(fd); |
| 203 | if (fd != fileno(stdin)) |
| 204 | (void)close(fd); |
| 205 | } while (*argv); |
| 206 | } |
| 207 | |
| 208 | raw_cat(fd) |
| 209 | register int fd; |
| 210 | { |
| 211 | extern int errno; |
| 212 | register int nr, nw, off; |
| 213 | static int bsize; |
| 214 | static char *buf; |
| 215 | struct stat sbuf; |
| 216 | char *malloc(), *strerror(); |
| 217 | |
| 218 | if (!buf) { |
| 219 | if (fstat(fileno(stdout), &sbuf)) { |
| 220 | (void)fprintf(stderr, "cat: %s: %s\n", filename, |
| 221 | strerror(errno)); |
| 222 | return(1); |
| 223 | } |
| 224 | bsize = MAX(sbuf.st_blksize, 1024); |
| 225 | if (!(buf = malloc((u_int)bsize))) { |
| 226 | (void)fprintf(stderr, "cat: %s: no memory.\n", |
| 227 | filename); |
| 228 | return(1); |
| 229 | } |
| 230 | } |
| 231 | while ((nr = read(fd, buf, bsize)) > 0) |
| 232 | for (off = 0; off < nr;) { |
| 233 | if ((nw = write(fileno(stdout), buf + off, nr)) < 0) { |
| 234 | perror("cat: stdout"); |
| 235 | return(1); |
| 236 | } |
| 237 | off += nw; |
| 238 | } |
| 239 | if (nr < 0) { |
| 240 | (void)fprintf(stderr, "cat: %s: %s\n", filename, |
| 241 | strerror(errno)); |
| 242 | return(1); |
| 243 | } |
| 244 | return(0); |
| 245 | } |