Erik Andersen | 13456d1 | 2000-03-16 08:09:57 +0000 | [diff] [blame^] | 1 | /* vi: set sw=4 ts=4: */ |
| 2 | /* |
| 3 | * echo implementation for busybox |
| 4 | * |
| 5 | * Copyright (c) 1991, 1993 |
| 6 | * The Regents of the University of California. All rights reserved. |
| 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 | * Original copyright notice is retained at the end of this file. |
| 23 | */ |
| 24 | |
| 25 | #include "internal.h" |
| 26 | #include <stdio.h> |
| 27 | |
| 28 | extern int |
| 29 | echo_main(int argc, char** argv) |
| 30 | { |
| 31 | register char **ap; |
| 32 | register char *p; |
| 33 | register char c; |
| 34 | int nflag = 0; |
| 35 | int eflag = 0; |
| 36 | |
| 37 | ap = argv; |
| 38 | if (argc) |
| 39 | ap++; |
| 40 | while ((p = *ap) != NULL && *p == '-') { |
| 41 | if (strcmp(p, "-n")==0) { |
| 42 | nflag = 1; |
| 43 | } else if (strcmp(p, "-e")==0) { |
| 44 | eflag = 1; |
| 45 | } else if (strcmp(p, "-E")==0) { |
| 46 | eflag = 0; |
| 47 | } |
| 48 | else break; |
| 49 | ap++; |
| 50 | } |
| 51 | while ((p = *ap++) != NULL) { |
| 52 | while ((c = *p++) != '\0') { |
| 53 | if (c == '\\' && eflag) { |
| 54 | switch (c = *p++) { |
| 55 | case 'a': c = '\007'; break; |
| 56 | case 'b': c = '\b'; break; |
| 57 | case 'c': exit( 0); /* exit */ |
| 58 | case 'f': c = '\f'; break; |
| 59 | case 'n': c = '\n'; break; |
| 60 | case 'r': c = '\r'; break; |
| 61 | case 't': c = '\t'; break; |
| 62 | case 'v': c = '\v'; break; |
| 63 | case '\\': break; /* c = '\\' */ |
| 64 | case '0': case '1': case '2': case '3': |
| 65 | case '4': case '5': case '6': case '7': |
| 66 | c -= '0'; |
| 67 | if (*p >= '0' && *p <= '7') |
| 68 | c = c * 8 + (*p++ - '0'); |
| 69 | if (*p >= '0' && *p <= '7') |
| 70 | c = c * 8 + (*p++ - '0'); |
| 71 | break; |
| 72 | default: |
| 73 | p--; |
| 74 | break; |
| 75 | } |
| 76 | } |
| 77 | putchar(c); |
| 78 | } |
| 79 | if (*ap) |
| 80 | putchar(' '); |
| 81 | } |
| 82 | if (! nflag) |
| 83 | putchar('\n'); |
| 84 | fflush(stdout); |
| 85 | exit( 0); |
| 86 | } |
| 87 | |
| 88 | /*- |
| 89 | * Copyright (c) 1991, 1993 |
| 90 | * The Regents of the University of California. All rights reserved. |
| 91 | * |
| 92 | * This code is derived from software contributed to Berkeley by |
| 93 | * Kenneth Almquist. |
| 94 | * |
| 95 | * Redistribution and use in source and binary forms, with or without |
| 96 | * modification, are permitted provided that the following conditions |
| 97 | * are met: |
| 98 | * 1. Redistributions of source code must retain the above copyright |
| 99 | * notice, this list of conditions and the following disclaimer. |
| 100 | * 2. Redistributions in binary form must reproduce the above copyright |
| 101 | * notice, this list of conditions and the following disclaimer in the |
| 102 | * documentation and/or other materials provided with the distribution. |
| 103 | * 3. All advertising materials mentioning features or use of this software |
| 104 | * must display the following acknowledgement: |
| 105 | * This product includes software developed by the University of |
| 106 | * California, Berkeley and its contributors. |
| 107 | * 4. Neither the name of the University nor the names of its contributors |
| 108 | * may be used to endorse or promote products derived from this software |
| 109 | * without specific prior written permission. |
| 110 | * |
| 111 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 112 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 113 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 114 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 115 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 116 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 117 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 118 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 119 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 120 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 121 | * SUCH DAMAGE. |
| 122 | * |
| 123 | * @(#)echo.c 8.1 (Berkeley) 5/31/93 |
| 124 | */ |
| 125 | |
| 126 | |