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7f473204 | 1 | /*- |
d1b73048 KB |
2 | * Copyright (c) 1991, 1993 |
3 | * The Regents of the University of California. All rights reserved. | |
7f473204 KB |
4 | * |
5 | * This code is derived from software contributed to Berkeley by | |
6 | * Kenneth Almquist. | |
7 | * | |
8 | * %sccs.include.redist.c% | |
9 | * | |
cbfe5a6d | 10 | * @(#)echo.c 8.2 (Berkeley) %G% |
7f473204 KB |
11 | */ |
12 | ||
13 | /* | |
14 | * Echo command. | |
15 | */ | |
16 | ||
17 | #define main echocmd | |
18 | ||
19 | #include "bltin.h" | |
20 | ||
ddba57cd | 21 | /* #define eflag 1 */ |
7f473204 | 22 | |
cbfe5a6d CZ |
23 | int |
24 | main(argc, argv) | |
25 | int argc; | |
26 | char **argv; | |
27 | { | |
ddba57cd | 28 | register char **ap; |
7f473204 KB |
29 | register char *p; |
30 | register char c; | |
31 | int count; | |
32 | int nflag = 0; | |
ddba57cd | 33 | #ifndef eflag |
7f473204 | 34 | int eflag = 0; |
ddba57cd | 35 | #endif |
7f473204 | 36 | |
ddba57cd MT |
37 | ap = argv; |
38 | if (argc) | |
39 | ap++; | |
40 | if ((p = *ap) != NULL) { | |
41 | if (equal(p, "-n")) { | |
7f473204 | 42 | nflag++; |
ddba57cd MT |
43 | ap++; |
44 | } else if (equal(p, "-e")) { | |
45 | #ifndef eflag | |
7f473204 | 46 | eflag++; |
ddba57cd MT |
47 | #endif |
48 | ap++; | |
7f473204 | 49 | } |
ddba57cd MT |
50 | } |
51 | while ((p = *ap++) != NULL) { | |
52 | while ((c = *p++) != '\0') { | |
53 | if (c == '\\' && eflag) { | |
54 | switch (*p++) { | |
55 | case 'b': c = '\b'; break; | |
56 | case 'c': return 0; /* exit */ | |
57 | case 'f': c = '\f'; break; | |
58 | case 'n': c = '\n'; break; | |
59 | case 'r': c = '\r'; break; | |
60 | case 't': c = '\t'; break; | |
61 | case 'v': c = '\v'; break; | |
62 | case '\\': break; /* c = '\\' */ | |
63 | case '0': | |
64 | c = 0; | |
65 | count = 3; | |
66 | while (--count >= 0 && (unsigned)(*p - '0') < 8) | |
67 | c = (c << 3) + (*p++ - '0'); | |
68 | break; | |
69 | default: | |
70 | p--; | |
71 | break; | |
7f473204 | 72 | } |
7f473204 | 73 | } |
ddba57cd | 74 | putchar(c); |
7f473204 | 75 | } |
ddba57cd MT |
76 | if (*ap) |
77 | putchar(' '); | |
7f473204 | 78 | } |
ddba57cd | 79 | if (! nflag) |
7f473204 KB |
80 | putchar('\n'); |
81 | return 0; | |
82 | } |