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| Rev | Author | Line No. | Line |
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| 2714 | cejka | 1 | /* $NetBSD: echo.c,v 1.8 1996/11/02 18:26:06 christos Exp $ */ |
| 2 | |||
| 3 | /*- |
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| 4 | * Copyright (c) 1991, 1993 |
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| 5 | * The Regents of the University of California. All rights reserved. |
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| 6 | * |
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| 7 | * This code is derived from software contributed to Berkeley by |
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| 8 | * Kenneth Almquist. |
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| 9 | * |
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| 10 | * Redistribution and use in source and binary forms, with or without |
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| 11 | * modification, are permitted provided that the following conditions |
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| 12 | * are met: |
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| 13 | * 1. Redistributions of source code must retain the above copyright |
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| 14 | * notice, this list of conditions and the following disclaimer. |
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| 15 | * 2. Redistributions in binary form must reproduce the above copyright |
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| 16 | * notice, this list of conditions and the following disclaimer in the |
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| 17 | * documentation and/or other materials provided with the distribution. |
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| 18 | * 3. All advertising materials mentioning features or use of this software |
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| 19 | * must display the following acknowledgement: |
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| 20 | * This product includes software developed by the University of |
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| 21 | * California, Berkeley and its contributors. |
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| 22 | * 4. Neither the name of the University nor the names of its contributors |
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| 23 | * may be used to endorse or promote products derived from this software |
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| 24 | * without specific prior written permission. |
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| 25 | * |
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| 26 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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| 27 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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| 28 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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| 29 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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| 30 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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| 31 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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| 32 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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| 33 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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| 34 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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| 35 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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| 36 | * SUCH DAMAGE. |
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| 37 | * |
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| 38 | * @(#)echo.c 8.1 (Berkeley) 5/31/93 |
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| 39 | */ |
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| 40 | |||
| 41 | /* |
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| 42 | * Echo command. |
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| 43 | */ |
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| 44 | |||
| 45 | #define main echocmd |
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| 46 | |||
| 47 | #ifdef _GNU_SOURCE |
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| 48 | #include <stdio.h> |
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| 49 | |||
| 50 | #include "../mystring.h" |
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| 51 | #else |
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| 52 | #include "bltin.h" |
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| 53 | #endif |
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| 54 | |||
| 55 | /* #define eflag 1 */ |
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| 56 | |||
| 57 | int |
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| 58 | main(argc, argv) char **argv; { |
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| 59 | register char **ap; |
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| 60 | register char *p; |
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| 61 | register char c; |
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| 62 | int nflag = 0; |
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| 63 | #ifndef eflag |
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| 64 | int eflag = 0; |
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| 65 | #endif |
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| 66 | |||
| 67 | ap = argv; |
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| 68 | if (argc) |
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| 69 | ap++; |
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| 70 | while ((p = *ap) != NULL && *p == '-') { |
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| 71 | if (equal(p, "-n")) { |
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| 72 | nflag = 1; |
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| 73 | } else if (equal(p, "-e")) { |
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| 74 | #ifndef eflag |
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| 75 | eflag = 1; |
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| 76 | #endif |
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| 77 | } else if (equal(p, "-E")) { |
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| 78 | #ifndef eflag |
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| 79 | eflag = 0; |
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| 80 | #endif |
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| 81 | } |
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| 82 | else break; |
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| 83 | ap++; |
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| 84 | } |
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| 85 | while ((p = *ap++) != NULL) { |
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| 86 | while ((c = *p++) != '\0') { |
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| 87 | if (c == '\\' && eflag) { |
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| 88 | switch (c = *p++) { |
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| 89 | case 'a': c = '\007'; break; |
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| 90 | case 'b': c = '\b'; break; |
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| 91 | case 'c': return 0; /* exit */ |
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| 92 | case 'e': c = '\033'; break; |
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| 93 | case 'f': c = '\f'; break; |
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| 94 | case 'n': c = '\n'; break; |
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| 95 | case 'r': c = '\r'; break; |
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| 96 | case 't': c = '\t'; break; |
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| 97 | case 'v': c = '\v'; break; |
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| 98 | case '\\': break; /* c = '\\' */ |
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| 99 | case '0': case '1': case '2': case '3': |
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| 100 | case '4': case '5': case '6': case '7': |
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| 101 | c -= '0'; |
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| 102 | if (*p >= '0' && *p <= '7') |
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| 103 | c = c * 8 + (*p++ - '0'); |
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| 104 | if (*p >= '0' && *p <= '7') |
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| 105 | c = c * 8 + (*p++ - '0'); |
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| 106 | break; |
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| 107 | default: |
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| 108 | p--; |
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| 109 | break; |
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| 110 | } |
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| 111 | } |
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| 112 | putchar(c); |
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| 113 | } |
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| 114 | if (*ap) |
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| 115 | putchar(' '); |
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| 116 | } |
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| 117 | if (! nflag) |
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| 118 | putchar('\n'); |
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| 119 | #ifdef _GNU_SOURCE |
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| 120 | fflush(stdout); |
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| 121 | if (ferror(stdout)) { |
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| 122 | clearerr(stdout); |
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| 123 | return 1; |
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| 124 | } |
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| 125 | #endif |
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| 126 | return 0; |
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| 127 | } |