| John Beppu | 059f152 | 1999-12-10 05:27:16 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Mini tee implementation for busybox |
| 3 | * |
| 4 | * |
| 5 | * Copyright (C) 1999 by Lineo, inc. |
| 6 | * Written by John Beppu <beppu@line.com> |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License as published by |
| 10 | * the Free Software Foundation; either version 2 of the License, or |
| 11 | * (at your option) any later version. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 16 | * General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License |
| 19 | * along with this program; if not, write to the Free Software |
| 20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 21 | * |
| 22 | */ |
| 23 | |
| 24 | #include <stdio.h> |
| 25 | #include <stdlib.h> |
| 26 | |
| 27 | /* FileList _______________________________________________________________ */ |
| 28 | |
| 29 | #define FL_MAX 1024 |
| 30 | static FILE *FileList[FL_MAX]; |
| 31 | static int FL_end; |
| 32 | |
| 33 | typedef void (FL_Function)(FILE *file, char c); |
| 34 | |
| 35 | /* initialize FileList */ |
| 36 | static void |
| 37 | FL_init() |
| 38 | { |
| 39 | FL_end = 0; |
| 40 | FileList[0] = stdout; |
| 41 | } |
| 42 | |
| 43 | /* add a file to FileList */ |
| 44 | static int |
| 45 | FL_add(const char *filename, char *opt_open) |
| 46 | { |
| 47 | FILE *file; |
| 48 | |
| 49 | file = fopen(filename, opt_open); |
| 50 | if (!file) { return 0; }; |
| 51 | if (FL_end < FL_MAX) { |
| 52 | FileList[++FL_end] = file; |
| 53 | } |
| 54 | return 1; |
| 55 | } |
| 56 | |
| 57 | /* apply a function to everything in FileList */ |
| 58 | static void |
| 59 | FL_apply(FL_Function *f, char c) |
| 60 | { |
| 61 | int i; |
| 62 | for (i = 0; i <= FL_end; i++) { |
| 63 | f(FileList[i], c); |
| 64 | } |
| 65 | } |
| 66 | |
| 67 | /* ________________________________________________________________________ */ |
| 68 | |
| 69 | /* FL_Function for writing to files*/ |
| 70 | static void |
| 71 | tee_fwrite(FILE *file, char c) |
| 72 | { |
| 73 | fputc(c, file); |
| 74 | } |
| 75 | |
| 76 | /* FL_Function for closing files */ |
| 77 | static void |
| 78 | tee_fclose(FILE *file, char c) |
| 79 | { |
| 80 | fclose(file); |
| 81 | } |
| 82 | |
| 83 | /* help message */ |
| 84 | static void |
| 85 | tee_usage() |
| 86 | { |
| 87 | fprintf ( |
| 88 | stdout, |
| 89 | "%s\n%s\n%s\n%s\n%s\n", |
| 90 | "Usage: tee [OPTION]... [FILE]...", |
| 91 | "Copy standard input to each FILE, and also to standard output.\n", |
| 92 | " -a, append to the given FILEs, do not overwrite", |
| 93 | " -i, ignore interrupt signals", |
| 94 | " -h, this help message" |
| 95 | ); |
| 96 | exit(1); |
| 97 | } |
| 98 | |
| 99 | /* BusyBoxed tee(1) */ |
| 100 | int |
| 101 | tee_main(int argc, char **argv) |
| 102 | { |
| 103 | int i; |
| 104 | char c; |
| 105 | char opt; |
| 106 | char opt_fopen[2] = "w"; |
| 107 | |
| 108 | /* parse argv[] */ |
| 109 | for (i = 1; i < argc; i++) { |
| 110 | if (argv[i][0] == '-') { |
| 111 | opt = argv[i][1]; |
| 112 | switch (opt) { |
| 113 | case 'a': |
| 114 | opt_fopen[0] = 'a'; |
| 115 | break; |
| 116 | case 'i': |
| 117 | fprintf(stderr, "ingore interrupt not implemented\n"); |
| 118 | break; |
| 119 | case 'h': |
| 120 | tee_usage(); |
| 121 | break; |
| 122 | default: |
| 123 | fprintf(stderr, "tee: invalid option -- %c\n", opt); |
| 124 | tee_usage(); |
| 125 | } |
| 126 | } else { |
| 127 | break; |
| 128 | } |
| 129 | } |
| 130 | |
| 131 | /* init FILE pointers */ |
| 132 | FL_init(); |
| 133 | for ( ; i < argc; i++) { |
| 134 | FL_add(argv[i], opt_fopen); |
| 135 | } |
| 136 | |
| 137 | /* read and redirect */ |
| 138 | while ((c = (char) getchar()) && (!feof(stdin))) { |
| 139 | FL_apply(tee_fwrite, c); |
| 140 | } |
| 141 | |
| 142 | /* clean up */ |
| 143 | FL_apply(tee_fclose, 0); |
| 144 | exit(0); |
| 145 | } |
| 146 | |
| 147 | /* $Id: tee.c,v 1.1 1999/12/10 05:27:16 beppu Exp $ */ |