Annotation of src/usr.bin/unvis/unvis.c, Revision 1.11
1.11 ! okan 1: /* $OpenBSD: unvis.c,v 1.10 2013/11/15 22:20:04 millert 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:
1.10 millert 32: #include <err.h>
1.1 deraadt 33: #include <stdio.h>
34: #include <stdlib.h>
1.10 millert 35: #include <unistd.h>
1.1 deraadt 36: #include <vis.h>
37:
1.5 millert 38: void process(FILE *fp, const char *filename);
1.1 deraadt 39:
40: int
1.7 deraadt 41: main(int argc, char *argv[])
1.1 deraadt 42: {
43: FILE *fp;
44: int ch;
45:
1.3 millert 46: while ((ch = getopt(argc, argv, "")) != -1)
1.11 ! okan 47: switch(ch) {
1.1 deraadt 48: case '?':
49: default:
1.8 sobrado 50: (void) fprintf(stderr, "usage: unvis [file ...]\n");
1.1 deraadt 51: exit(1);
52: }
53: argc -= optind;
54: argv += optind;
55:
56: if (*argv)
57: while (*argv) {
58: if ((fp=fopen(*argv, "r")) != NULL)
59: process(fp, *argv);
60: else
61: warn("%s", *argv);
62: argv++;
63: }
64: else
65: process(stdin, "<stdin>");
66: exit(0);
67: }
68:
69: void
1.7 deraadt 70: process(FILE *fp, const char *filename)
1.1 deraadt 71: {
1.4 mpech 72: int offset = 0, c, ret;
1.1 deraadt 73: int state = 0;
74: char outc;
75:
76: while ((c = getc(fp)) != EOF) {
77: offset++;
78: again:
79: switch(ret = unvis(&outc, (char)c, &state, 0)) {
80: case UNVIS_VALID:
81: putchar(outc);
82: break;
83: case UNVIS_VALIDPUSH:
84: putchar(outc);
85: goto again;
86: case UNVIS_SYNBAD:
87: warnx("%s: offset: %d: can't decode", filename, offset);
88: state = 0;
89: break;
90: case 0:
91: case UNVIS_NOCHAR:
92: break;
93: default:
94: errx(1, "bad return value (%d), can't happen", ret);
95: /* NOTREACHED */
96: }
97: }
98: if (unvis(&outc, (char)0, &state, UNVIS_END) == UNVIS_VALID)
99: putchar(outc);
100: }