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1 | /*- |
2 | * Copyright (c) 1991 The Regents of the University of California. | |
3 | * All rights reserved. | |
4 | * | |
5 | * This code is derived from software contributed to Berkeley by | |
6 | * Kenneth Almquist. | |
7 | * | |
8 | * %sccs.include.redist.c% | |
9 | * | |
10 | * @(#)echo.c 5.1 (Berkeley) %G% | |
11 | */ | |
12 | ||
13 | /* | |
14 | * Echo command. | |
15 | */ | |
16 | ||
17 | #define main echocmd | |
18 | ||
19 | #include "bltin.h" | |
20 | ||
21 | #define EOF (-1) | |
22 | ||
23 | main(argc, argv) | |
24 | char **argv; | |
25 | { | |
26 | register char *p; | |
27 | register char c; | |
28 | int count; | |
29 | int nflag = 0; | |
30 | int eflag = 0; | |
31 | extern char *optarg; | |
32 | extern int optind, opterr; | |
33 | int ch; | |
34 | ||
35 | opterr = 0; | |
36 | while ((ch = getopt(argc, argv, "ne")) != EOF) | |
37 | switch((char)ch) { | |
38 | case 'n': | |
39 | nflag++; | |
40 | break; | |
41 | case 'e': | |
42 | eflag++; | |
43 | break; | |
44 | case '?': | |
45 | default: | |
46 | error("usage: %s [-ne] [arg]...", *argv); | |
47 | return 0; | |
48 | } | |
49 | argc -= optind; | |
50 | argv += optind; | |
51 | ||
52 | if (!eflag) { | |
53 | while (p = *argv++) { | |
54 | while (*p) { | |
55 | putchar(*p); | |
56 | p++; | |
57 | } | |
58 | if (*argv) putchar(' '); | |
59 | } | |
60 | } else { | |
61 | while (p = *argv++) { | |
62 | while (c = *p++) { | |
63 | if (c == '\\') { | |
64 | switch (*p++) { | |
65 | case 'b': c = '\b'; break; | |
66 | case 'c': return 0; /* exit */ | |
67 | case 'f': c = '\f'; break; | |
68 | case 'n': c = '\n'; break; | |
69 | case 'r': c = '\r'; break; | |
70 | case 't': c = '\t'; break; | |
71 | case 'v': c = '\v'; break; | |
72 | case '\\': break; /* c = '\\' */ | |
73 | case '0': /* should be [0-7] */ | |
74 | c = 0; | |
75 | count = 3; | |
76 | while (--count >= 0 && (unsigned)(*p - '0') < 8) | |
77 | c = (c << 3) + (*p++ - '0'); | |
78 | break; | |
79 | default: | |
80 | p--; | |
81 | break; | |
82 | } | |
83 | } | |
84 | putchar(c); | |
85 | } | |
86 | if (*argv) putchar(' '); | |
87 | } | |
88 | } | |
89 | if (!nflag) | |
90 | putchar('\n'); | |
91 | return 0; | |
92 | } | |
93 | ||
94 | #ifndef SHELL | |
95 | void | |
96 | error(f, a) | |
97 | { | |
98 | _doprnt(f, &a, stderr); | |
99 | } | |
100 | #endif |