Annotation of src/usr.bin/unvis/unvis.c, Revision 1.8
1.8 ! sobrado 1: /* $OpenBSD: unvis.c,v 1.7 2003/06/10 22:20:53 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.
1.6 millert 15: * 3. Neither the name of the University nor the names of its contributors
1.1 deraadt 16: * may be used to endorse or promote products derived from this software
17: * without specific prior written permission.
18: *
19: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29: * SUCH DAMAGE.
30: */
31:
32: #ifndef lint
33: static char copyright[] =
34: "@(#) Copyright (c) 1989, 1993\n\
35: The Regents of the University of California. All rights reserved.\n";
36: #endif /* not lint */
37:
38: #ifndef lint
39: #if 0
40: static char sccsid[] = "@(#)unvis.c 8.1 (Berkeley) 6/6/93";
41: #endif
1.8 ! sobrado 42: static char rcsid[] = "$OpenBSD: unvis.c,v 1.7 2003/06/10 22:20:53 deraadt Exp $";
1.1 deraadt 43: #endif /* not lint */
44:
45: #include <stdio.h>
46: #include <stdlib.h>
47: #include <err.h>
48: #include <vis.h>
49:
1.5 millert 50: void process(FILE *fp, const char *filename);
1.1 deraadt 51:
52: int
1.7 deraadt 53: main(int argc, char *argv[])
1.1 deraadt 54: {
55: FILE *fp;
56: int ch;
57:
1.3 millert 58: while ((ch = getopt(argc, argv, "")) != -1)
1.1 deraadt 59: switch((char)ch) {
60: case '?':
61: default:
1.8 ! sobrado 62: (void) fprintf(stderr, "usage: unvis [file ...]\n");
1.1 deraadt 63: exit(1);
64: }
65: argc -= optind;
66: argv += optind;
67:
68: if (*argv)
69: while (*argv) {
70: if ((fp=fopen(*argv, "r")) != NULL)
71: process(fp, *argv);
72: else
73: warn("%s", *argv);
74: argv++;
75: }
76: else
77: process(stdin, "<stdin>");
78: exit(0);
79: }
80:
81: void
1.7 deraadt 82: process(FILE *fp, const char *filename)
1.1 deraadt 83: {
1.4 mpech 84: int offset = 0, c, ret;
1.1 deraadt 85: int state = 0;
86: char outc;
87:
88: while ((c = getc(fp)) != EOF) {
89: offset++;
90: again:
91: switch(ret = unvis(&outc, (char)c, &state, 0)) {
92: case UNVIS_VALID:
93: putchar(outc);
94: break;
95: case UNVIS_VALIDPUSH:
96: putchar(outc);
97: goto again;
98: case UNVIS_SYNBAD:
99: warnx("%s: offset: %d: can't decode", filename, offset);
100: state = 0;
101: break;
102: case 0:
103: case UNVIS_NOCHAR:
104: break;
105: default:
106: errx(1, "bad return value (%d), can't happen", ret);
107: /* NOTREACHED */
108: }
109: }
110: if (unvis(&outc, (char)0, &state, UNVIS_END) == UNVIS_VALID)
111: putchar(outc);
112: }