projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| efa30d97 BJ |
1 | /* |
| 2 | * Concatenate files. | |
| 3 | */ | |
| ec0bdac7 | 4 | static char *Sccsid = "@(#)cat.c 4.4 (Berkeley) %G%"; |
| efa30d97 BJ |
5 | |
| 6 | #include <stdio.h> | |
| 7 | #include <sys/types.h> | |
| 8 | #include <sys/stat.h> | |
| 9 | ||
| 10 | char stdbuf[BUFSIZ]; | |
| 3c67f80d BJ |
11 | int bflg, eflg, nflg, sflg, tflg, vflg; |
| 12 | int spaced, col, lno, inline; | |
| efa30d97 BJ |
13 | |
| 14 | main(argc, argv) | |
| 15 | char **argv; | |
| 16 | { | |
| 17 | int fflg = 0; | |
| 18 | register FILE *fi; | |
| 19 | register c; | |
| 20 | int dev, ino = -1; | |
| 21 | struct stat statb; | |
| 22 | ||
| 3c67f80d | 23 | lno = 1; |
| efa30d97 BJ |
24 | setbuf(stdout, stdbuf); |
| 25 | for( ; argc>1 && argv[1][0]=='-'; argc--,argv++) { | |
| 26 | switch(argv[1][1]) { | |
| 27 | case 0: | |
| 28 | break; | |
| 29 | case 'u': | |
| 30 | setbuf(stdout, (char *)NULL); | |
| 31 | continue; | |
| 3c67f80d BJ |
32 | case 'n': |
| 33 | nflg++; | |
| 34 | continue; | |
| 35 | case 'b': | |
| 36 | bflg++; | |
| 37 | nflg++; | |
| 38 | continue; | |
| 39 | case 'v': | |
| 40 | vflg++; | |
| 41 | continue; | |
| 42 | case 's': | |
| 43 | sflg++; | |
| 44 | continue; | |
| 45 | case 'e': | |
| 46 | eflg++; | |
| 47 | vflg++; | |
| 48 | continue; | |
| 49 | case 't': | |
| 50 | tflg++; | |
| 51 | vflg++; | |
| 52 | continue; | |
| efa30d97 BJ |
53 | } |
| 54 | break; | |
| 55 | } | |
| 72c98f6b EC |
56 | if (fstat(fileno(stdout), &statb) == 0) { |
| 57 | statb.st_mode &= S_IFMT; | |
| 58 | if (statb.st_mode!=S_IFCHR && statb.st_mode!=S_IFBLK) { | |
| 59 | dev = statb.st_dev; | |
| 60 | ino = statb.st_ino; | |
| 61 | } | |
| efa30d97 BJ |
62 | } |
| 63 | if (argc < 2) { | |
| 64 | argc = 2; | |
| 65 | fflg++; | |
| 66 | } | |
| 67 | while (--argc > 0) { | |
| 68 | if (fflg || (*++argv)[0]=='-' && (*argv)[1]=='\0') | |
| 69 | fi = stdin; | |
| 70 | else { | |
| 71 | if ((fi = fopen(*argv, "r")) == NULL) { | |
| 72 | fprintf(stderr, "cat: can't open %s\n", *argv); | |
| 73 | continue; | |
| 74 | } | |
| 75 | } | |
| 72c98f6b | 76 | if (fstat(fileno(fi), &statb) == 0) { |
| ec0bdac7 BJ |
77 | if ((statb.st_mode & S_IFMT) == S_IFREG && |
| 78 | statb.st_dev==dev && statb.st_ino==ino) { | |
| 72c98f6b EC |
79 | fprintf(stderr, "cat: input %s is output\n", |
| 80 | fflg?"-": *argv); | |
| 81 | fclose(fi); | |
| 82 | continue; | |
| 83 | } | |
| efa30d97 | 84 | } |
| 3c67f80d BJ |
85 | if (nflg||sflg||vflg) |
| 86 | copyopt(fi); | |
| 87 | else { | |
| 88 | while ((c = getc(fi)) != EOF) | |
| 89 | putchar(c); | |
| 90 | } | |
| efa30d97 BJ |
91 | if (fi!=stdin) |
| 92 | fclose(fi); | |
| 93 | } | |
| 3c67f80d BJ |
94 | if (ferror(stdout)) |
| 95 | fprintf(stderr, "cat: output write error\n"); | |
| efa30d97 BJ |
96 | return(0); |
| 97 | } | |
| 3c67f80d BJ |
98 | |
| 99 | copyopt(f) | |
| 100 | register FILE *f; | |
| 101 | { | |
| 102 | register int c; | |
| 103 | ||
| 104 | top: | |
| 105 | c = getc(f); | |
| 106 | if (c == EOF) | |
| 107 | return; | |
| 108 | if (c == '\n') { | |
| 109 | if (inline == 0) { | |
| 110 | if (sflg && spaced) | |
| 111 | goto top; | |
| 112 | spaced = 1; | |
| 113 | } | |
| 114 | if (nflg && bflg==0 && inline == 0) | |
| 115 | printf("%6d\t", lno++); | |
| 116 | if (eflg) | |
| 117 | putchar('$'); | |
| 118 | putchar('\n'); | |
| 119 | inline = 0; | |
| 120 | goto top; | |
| 121 | } | |
| 122 | if (nflg && inline == 0) | |
| 123 | printf("%6d\t", lno++); | |
| 124 | inline = 1; | |
| 125 | if (vflg) { | |
| 126 | if (tflg==0 && c == '\t') | |
| 127 | putchar(c); | |
| 128 | else { | |
| 129 | if (c > 0177) { | |
| 130 | printf("M-"); | |
| 131 | c &= 0177; | |
| 132 | } | |
| 133 | if (c < ' ') | |
| 134 | printf("^%c", c+'@'); | |
| 135 | else if (c == 0177) | |
| 136 | printf("^?"); | |
| 137 | else | |
| 138 | putchar(c); | |
| 139 | } | |
| 140 | } else | |
| 141 | putchar(c); | |
| 142 | spaced = 0; | |
| 143 | goto top; | |
| 144 | } |