1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
|
/* $OpenBSD: dc.c,v 1.3 2003/09/19 19:06:29 deraadt Exp $ */
/*
* Copyright (c) 2003, Otto Moerbeek <otto@drijf.net>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef lint
static const char rcsid[] = "$OpenBSD: dc.c,v 1.3 2003/09/19 19:06:29 deraadt Exp $";
#endif /* not lint */
#include <err.h>
#include <stdlib.h>
#include <string.h>
#include "extern.h"
static __dead void usage(void);
extern char *__progname;
static __dead void
usage(void)
{
fprintf(stderr, "usage: %s [file]\n", __progname);
exit(1);
}
int
main(int argc, char *argv[])
{
FILE *file;
struct source src;
if (argc > 2)
usage();
init_bmachine();
setlinebuf(stdout);
setlinebuf(stderr);
if (argc == 2 && strcmp(argv[1], "-") != 0) {
file = fopen(argv[1], "r");
if (file == NULL)
err(1, "cannot open file %s", argv[1]);
src_setstream(&src, file);
reset_bmachine(&src);
eval();
fclose(file);
}
/*
* BSD dc and Solaris dc continue with stdin after processing
* the file given as the argument.
*/
src_setstream(&src, stdin);
reset_bmachine(&src);
eval();
return 0;
}
|
