Annotation of src/usr.bin/unvis/unvis.c, Revision 1.3
1.3 ! millert 1: /* $OpenBSD: unvis.c,v 1.2 1996/06/26 05:42:18 deraadt Exp $ */
1.2 deraadt 2:
1.1 deraadt 3: /*-
4: * Copyright (c) 1989, 1993
5: * The Regents of the University of California. All rights reserved.
6: *
7: * Redistribution and use in source and binary forms, with or without
8: * modification, are permitted provided that the following conditions
9: * are met:
10: * 1. Redistributions of source code must retain the above copyright
11: * notice, this list of conditions and the following disclaimer.
12: * 2. Redistributions in binary form must reproduce the above copyright
13: * notice, this list of conditions and the following disclaimer in the
14: * documentation and/or other materials provided with the distribution.
15: * 3. All advertising materials mentioning features or use of this software
16: * must display the following acknowledgement:
17: * This product includes software developed by the University of
18: * California, Berkeley and its contributors.
19: * 4. Neither the name of the University nor the names of its contributors
20: * may be used to endorse or promote products derived from this software
21: * without specific prior written permission.
22: *
23: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33: * SUCH DAMAGE.
34: */
35:
36: #ifndef lint
37: static char copyright[] =
38: "@(#) Copyright (c) 1989, 1993\n\
39: The Regents of the University of California. All rights reserved.\n";
40: #endif /* not lint */
41:
42: #ifndef lint
43: #if 0
44: static char sccsid[] = "@(#)unvis.c 8.1 (Berkeley) 6/6/93";
45: #endif
1.3 ! millert 46: static char rcsid[] = "$OpenBSD: unvis.c,v 1.2 1996/06/26 05:42:18 deraadt Exp $";
1.1 deraadt 47: #endif /* not lint */
48:
49: #include <stdio.h>
50: #include <stdlib.h>
51: #include <err.h>
52: #include <vis.h>
53:
54: void process __P((FILE *fp, const char *filename));
55:
56: int
57: main(argc, argv)
58: int argc;
59: char *argv[];
60: {
61: FILE *fp;
62: int ch;
63:
1.3 ! millert 64: while ((ch = getopt(argc, argv, "")) != -1)
1.1 deraadt 65: switch((char)ch) {
66: case '?':
67: default:
68: (void) fprintf(stderr, "usage: unvis [file...]\n");
69: exit(1);
70: }
71: argc -= optind;
72: argv += optind;
73:
74: if (*argv)
75: while (*argv) {
76: if ((fp=fopen(*argv, "r")) != NULL)
77: process(fp, *argv);
78: else
79: warn("%s", *argv);
80: argv++;
81: }
82: else
83: process(stdin, "<stdin>");
84: exit(0);
85: }
86:
87: void
88: process(fp, filename)
89: FILE *fp;
90: const char *filename;
91: {
92: register int offset = 0, c, ret;
93: int state = 0;
94: char outc;
95:
96: while ((c = getc(fp)) != EOF) {
97: offset++;
98: again:
99: switch(ret = unvis(&outc, (char)c, &state, 0)) {
100: case UNVIS_VALID:
101: putchar(outc);
102: break;
103: case UNVIS_VALIDPUSH:
104: putchar(outc);
105: goto again;
106: case UNVIS_SYNBAD:
107: warnx("%s: offset: %d: can't decode", filename, offset);
108: state = 0;
109: break;
110: case 0:
111: case UNVIS_NOCHAR:
112: break;
113: default:
114: errx(1, "bad return value (%d), can't happen", ret);
115: /* NOTREACHED */
116: }
117: }
118: if (unvis(&outc, (char)0, &state, UNVIS_END) == UNVIS_VALID)
119: putchar(outc);
120: }