74 lines
1.4 KiB
C
Executable file
74 lines
1.4 KiB
C
Executable file
/*
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* Echo command.
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*
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* Copyright (C) 1989 by Kenneth Almquist. All rights reserved.
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* This file is part of ash, which is distributed under the terms specified
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* by the Ash General Public License. See the file named LICENSE.
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*/
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#define main echocmd
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#include "bltin.h"
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#undef eflag
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main(argc, argv) char **argv; {
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register char **ap;
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register char *p;
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register char c;
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int count;
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int nflag = 0;
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#ifndef eflag
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int eflag = 0;
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#endif
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ap = argv;
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if (argc)
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ap++;
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if ((p = *ap) != NULL) {
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if (equal(p, "--")) {
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ap++;
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}
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if (equal(p, "-n")) {
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nflag++;
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ap++;
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} else if (equal(p, "-e")) {
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#ifndef eflag
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eflag++;
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#endif
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ap++;
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}
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}
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while ((p = *ap++) != NULL) {
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while ((c = *p++) != '\0') {
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if (c == '\\' && eflag) {
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switch (*p++) {
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case 'b': c = '\b'; break;
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case 'c': return 0; /* exit */
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case 'f': c = '\f'; break;
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case 'n': c = '\n'; break;
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case 'r': c = '\r'; break;
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case 't': c = '\t'; break;
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case 'v': c = '\v'; break;
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case '\\': break; /* c = '\\' */
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case '0':
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c = 0;
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count = 3;
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while (--count >= 0 && (unsigned)(*p - '0') < 8)
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c = (c << 3) + (*p++ - '0');
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break;
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default:
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p--;
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break;
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}
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}
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putchar(c);
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}
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if (*ap)
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putchar(' ');
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}
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if (! nflag)
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putchar('\n');
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return 0;
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}
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