projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 205a2d85 | 1 | #ifndef lint |
| 93f01e90 | 2 | static char *sccsid = "@(#)cat.c 4.7 (Berkeley) %G%"; |
| 205a2d85 SL |
3 | #endif |
| 4 | ||
| efa30d97 BJ |
5 | /* |
| 6 | * Concatenate files. | |
| 7 | */ | |
| 8 | ||
| 9 | #include <stdio.h> | |
| 10 | #include <sys/types.h> | |
| 11 | #include <sys/stat.h> | |
| 12 | ||
| 3c67f80d BJ |
13 | int bflg, eflg, nflg, sflg, tflg, vflg; |
| 14 | int spaced, col, lno, inline; | |
| efa30d97 BJ |
15 | |
| 16 | main(argc, argv) | |
| 17 | char **argv; | |
| 18 | { | |
| 19 | int fflg = 0; | |
| 20 | register FILE *fi; | |
| 21 | register c; | |
| 22 | int dev, ino = -1; | |
| 23 | struct stat statb; | |
| 24 | ||
| 3c67f80d | 25 | lno = 1; |
| efa30d97 BJ |
26 | for( ; argc>1 && argv[1][0]=='-'; argc--,argv++) { |
| 27 | switch(argv[1][1]) { | |
| 28 | case 0: | |
| 29 | break; | |
| 30 | case 'u': | |
| 31 | setbuf(stdout, (char *)NULL); | |
| 32 | continue; | |
| 3c67f80d BJ |
33 | case 'n': |
| 34 | nflg++; | |
| 35 | continue; | |
| 36 | case 'b': | |
| 37 | bflg++; | |
| 38 | nflg++; | |
| 39 | continue; | |
| 40 | case 'v': | |
| 41 | vflg++; | |
| 42 | continue; | |
| 43 | case 's': | |
| 44 | sflg++; | |
| 45 | continue; | |
| 46 | case 'e': | |
| 47 | eflg++; | |
| 48 | vflg++; | |
| 49 | continue; | |
| 50 | case 't': | |
| 51 | tflg++; | |
| 52 | vflg++; | |
| 53 | continue; | |
| efa30d97 BJ |
54 | } |
| 55 | break; | |
| 56 | } | |
| 72c98f6b EC |
57 | if (fstat(fileno(stdout), &statb) == 0) { |
| 58 | statb.st_mode &= S_IFMT; | |
| 59 | if (statb.st_mode!=S_IFCHR && statb.st_mode!=S_IFBLK) { | |
| 60 | dev = statb.st_dev; | |
| 61 | ino = statb.st_ino; | |
| 62 | } | |
| efa30d97 BJ |
63 | } |
| 64 | if (argc < 2) { | |
| 65 | argc = 2; | |
| 66 | fflg++; | |
| 67 | } | |
| 68 | while (--argc > 0) { | |
| 69 | if (fflg || (*++argv)[0]=='-' && (*argv)[1]=='\0') | |
| 70 | fi = stdin; | |
| 71 | else { | |
| 72 | if ((fi = fopen(*argv, "r")) == NULL) { | |
| 45fb66b3 | 73 | perror(*argv); |
| efa30d97 BJ |
74 | continue; |
| 75 | } | |
| 76 | } | |
| 72c98f6b | 77 | if (fstat(fileno(fi), &statb) == 0) { |
| ec0bdac7 BJ |
78 | if ((statb.st_mode & S_IFMT) == S_IFREG && |
| 79 | statb.st_dev==dev && statb.st_ino==ino) { | |
| 72c98f6b EC |
80 | fprintf(stderr, "cat: input %s is output\n", |
| 81 | fflg?"-": *argv); | |
| 82 | fclose(fi); | |
| 83 | continue; | |
| 84 | } | |
| efa30d97 | 85 | } |
| 3c67f80d BJ |
86 | if (nflg||sflg||vflg) |
| 87 | copyopt(fi); | |
| 88 | else { | |
| 89 | while ((c = getc(fi)) != EOF) | |
| 90 | putchar(c); | |
| 91 | } | |
| efa30d97 BJ |
92 | if (fi!=stdin) |
| 93 | fclose(fi); | |
| 94 | } | |
| 3c67f80d BJ |
95 | if (ferror(stdout)) |
| 96 | fprintf(stderr, "cat: output write error\n"); | |
| efa30d97 BJ |
97 | return(0); |
| 98 | } | |
| 3c67f80d BJ |
99 | |
| 100 | copyopt(f) | |
| 101 | register FILE *f; | |
| 102 | { | |
| 103 | register int c; | |
| 104 | ||
| 105 | top: | |
| 106 | c = getc(f); | |
| 107 | if (c == EOF) | |
| 108 | return; | |
| 109 | if (c == '\n') { | |
| 110 | if (inline == 0) { | |
| 111 | if (sflg && spaced) | |
| 112 | goto top; | |
| 113 | spaced = 1; | |
| 114 | } | |
| 115 | if (nflg && bflg==0 && inline == 0) | |
| 116 | printf("%6d\t", lno++); | |
| 117 | if (eflg) | |
| 118 | putchar('$'); | |
| 119 | putchar('\n'); | |
| 120 | inline = 0; | |
| 121 | goto top; | |
| 122 | } | |
| 123 | if (nflg && inline == 0) | |
| 124 | printf("%6d\t", lno++); | |
| 125 | inline = 1; | |
| 126 | if (vflg) { | |
| 127 | if (tflg==0 && c == '\t') | |
| 128 | putchar(c); | |
| 129 | else { | |
| 130 | if (c > 0177) { | |
| 131 | printf("M-"); | |
| 132 | c &= 0177; | |
| 133 | } | |
| 134 | if (c < ' ') | |
| 135 | printf("^%c", c+'@'); | |
| 136 | else if (c == 0177) | |
| 137 | printf("^?"); | |
| 138 | else | |
| 139 | putchar(c); | |
| 140 | } | |
| 141 | } else | |
| 142 | putchar(c); | |
| 143 | spaced = 0; | |
| 144 | goto top; | |
| 145 | } |