| 1 | /* |
| 2 | * Copyright (c) 1980 Regents of the University of California. |
| 3 | * All rights reserved. The Berkeley software License Agreement |
| 4 | * specifies the terms and conditions for redistribution. |
| 5 | */ |
| 6 | |
| 7 | #ifndef lint |
| 8 | static char sccsid[] = "@(#)cat.c 5.2 (Berkeley) %G%"; |
| 9 | #endif not lint |
| 10 | |
| 11 | /* |
| 12 | * Concatenate files. |
| 13 | */ |
| 14 | |
| 15 | #include <stdio.h> |
| 16 | #include <sys/types.h> |
| 17 | #include <sys/stat.h> |
| 18 | |
| 19 | /* #define OPTSIZE BUFSIZ /* define this only if not 4.2 BSD or beyond */ |
| 20 | |
| 21 | int bflg, eflg, nflg, sflg, tflg, uflg, vflg; |
| 22 | int spaced, col, lno, inline, ibsize, obsize; |
| 23 | |
| 24 | main(argc, argv) |
| 25 | char **argv; |
| 26 | { |
| 27 | int fflg = 0; |
| 28 | register FILE *fi; |
| 29 | register c; |
| 30 | int dev, ino = -1; |
| 31 | struct stat statb; |
| 32 | int retval = 0; |
| 33 | |
| 34 | lno = 1; |
| 35 | for( ; argc>1 && argv[1][0]=='-'; argc--,argv++) { |
| 36 | switch(argv[1][1]) { |
| 37 | case 0: |
| 38 | break; |
| 39 | case 'u': |
| 40 | setbuf(stdout, (char *)NULL); |
| 41 | uflg++; |
| 42 | continue; |
| 43 | case 'n': |
| 44 | nflg++; |
| 45 | continue; |
| 46 | case 'b': |
| 47 | bflg++; |
| 48 | nflg++; |
| 49 | continue; |
| 50 | case 'v': |
| 51 | vflg++; |
| 52 | continue; |
| 53 | case 's': |
| 54 | sflg++; |
| 55 | continue; |
| 56 | case 'e': |
| 57 | eflg++; |
| 58 | vflg++; |
| 59 | continue; |
| 60 | case 't': |
| 61 | tflg++; |
| 62 | vflg++; |
| 63 | continue; |
| 64 | } |
| 65 | break; |
| 66 | } |
| 67 | if (fstat(fileno(stdout), &statb) == 0) { |
| 68 | statb.st_mode &= S_IFMT; |
| 69 | if (statb.st_mode!=S_IFCHR && statb.st_mode!=S_IFBLK) { |
| 70 | dev = statb.st_dev; |
| 71 | ino = statb.st_ino; |
| 72 | } |
| 73 | #ifndef OPTSIZE |
| 74 | obsize = statb.st_blksize; |
| 75 | #endif |
| 76 | } |
| 77 | else |
| 78 | obsize = 0; |
| 79 | if (argc < 2) { |
| 80 | argc = 2; |
| 81 | fflg++; |
| 82 | } |
| 83 | while (--argc > 0) { |
| 84 | if (fflg || (*++argv)[0]=='-' && (*argv)[1]=='\0') |
| 85 | fi = stdin; |
| 86 | else { |
| 87 | if ((fi = fopen(*argv, "r")) == NULL) { |
| 88 | perror(*argv); |
| 89 | retval = 1; |
| 90 | continue; |
| 91 | } |
| 92 | } |
| 93 | if (fstat(fileno(fi), &statb) == 0) { |
| 94 | if ((statb.st_mode & S_IFMT) == S_IFREG && |
| 95 | statb.st_dev==dev && statb.st_ino==ino) { |
| 96 | fprintf(stderr, "cat: input %s is output\n", |
| 97 | fflg?"-": *argv); |
| 98 | fclose(fi); |
| 99 | retval = 1; |
| 100 | continue; |
| 101 | } |
| 102 | #ifndef OPTSIZE |
| 103 | ibsize = statb.st_blksize; |
| 104 | #endif |
| 105 | } |
| 106 | else |
| 107 | ibsize = 0; |
| 108 | if (nflg||sflg||vflg) |
| 109 | copyopt(fi); |
| 110 | else if (uflg) { |
| 111 | while ((c = getc(fi)) != EOF) |
| 112 | putchar(c); |
| 113 | } else |
| 114 | retval |= fastcat(fileno(fi)); /* no flags specified */ |
| 115 | if (fi!=stdin) |
| 116 | fclose(fi); |
| 117 | else |
| 118 | clearerr(fi); /* reset sticky eof */ |
| 119 | if (ferror(stdout)) { |
| 120 | fprintf(stderr, "cat: output write error\n"); |
| 121 | retval = 1; |
| 122 | break; |
| 123 | } |
| 124 | } |
| 125 | exit(retval); |
| 126 | } |
| 127 | |
| 128 | copyopt(f) |
| 129 | register FILE *f; |
| 130 | { |
| 131 | register int c; |
| 132 | |
| 133 | top: |
| 134 | c = getc(f); |
| 135 | if (c == EOF) |
| 136 | return; |
| 137 | if (c == '\n') { |
| 138 | if (inline == 0) { |
| 139 | if (sflg && spaced) |
| 140 | goto top; |
| 141 | spaced = 1; |
| 142 | } |
| 143 | if (nflg && bflg==0 && inline == 0) |
| 144 | printf("%6d\t", lno++); |
| 145 | if (eflg) |
| 146 | putchar('$'); |
| 147 | putchar('\n'); |
| 148 | inline = 0; |
| 149 | goto top; |
| 150 | } |
| 151 | if (nflg && inline == 0) |
| 152 | printf("%6d\t", lno++); |
| 153 | inline = 1; |
| 154 | if (vflg) { |
| 155 | if (tflg==0 && c == '\t') |
| 156 | putchar(c); |
| 157 | else { |
| 158 | if (c > 0177) { |
| 159 | printf("M-"); |
| 160 | c &= 0177; |
| 161 | } |
| 162 | if (c < ' ') |
| 163 | printf("^%c", c+'@'); |
| 164 | else if (c == 0177) |
| 165 | printf("^?"); |
| 166 | else |
| 167 | putchar(c); |
| 168 | } |
| 169 | } else |
| 170 | putchar(c); |
| 171 | spaced = 0; |
| 172 | goto top; |
| 173 | } |
| 174 | |
| 175 | fastcat(fd) |
| 176 | register int fd; |
| 177 | { |
| 178 | register int buffsize, n, nwritten, offset; |
| 179 | register char *buff; |
| 180 | struct stat statbuff; |
| 181 | char *malloc(); |
| 182 | |
| 183 | #ifndef OPTSIZE |
| 184 | if (obsize) |
| 185 | buffsize = obsize; /* common case, use output blksize */ |
| 186 | else if (ibsize) |
| 187 | buffsize = ibsize; |
| 188 | else |
| 189 | buffsize = BUFSIZ; |
| 190 | #else |
| 191 | buffsize = OPTSIZE; |
| 192 | #endif |
| 193 | |
| 194 | if ((buff = malloc(buffsize)) == NULL) { |
| 195 | perror("cat: no memory"); |
| 196 | return (1); |
| 197 | } |
| 198 | |
| 199 | /* |
| 200 | * Note that on some systems (V7), very large writes to a pipe |
| 201 | * return less than the requested size of the write. |
| 202 | * In this case, multiple writes are required. |
| 203 | */ |
| 204 | while ((n = read(fd, buff, buffsize)) > 0) { |
| 205 | offset = 0; |
| 206 | do { |
| 207 | nwritten = write(fileno(stdout), &buff[offset], n); |
| 208 | if (nwritten <= 0) { |
| 209 | perror("cat: write error"); |
| 210 | exit(2); |
| 211 | } |
| 212 | offset += nwritten; |
| 213 | } while ((n -= nwritten) > 0); |
| 214 | } |
| 215 | |
| 216 | free(buff); |
| 217 | if (n < 0) { |
| 218 | perror("cat: read error"); |
| 219 | return (1); |
| 220 | } |
| 221 | return (0); |
| 222 | } |