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