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/* $OpenBSD: unvis.c,v 1.15 2022/12/04 23:50:50 cheloha Exp $ */
/*-
* Copyright (c) 1989, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <vis.h>
void process(FILE *fp, const char *filename);
int
main(int argc, char *argv[])
{
FILE *fp;
int ch;
if (pledge("stdio rpath", NULL) == -1)
err(1, "pledge");
while ((ch = getopt(argc, argv, "")) != -1)
switch(ch) {
default:
(void) fprintf(stderr, "usage: unvis [file ...]\n");
exit(1);
}
argc -= optind;
argv += optind;
if (*argv)
while (*argv) {
if ((fp=fopen(*argv, "r")) != NULL) {
process(fp, *argv);
fclose(fp);
} else
warn("%s", *argv);
argv++;
}
else {
if (pledge("stdio", NULL) == -1)
err(1, "pledge");
process(stdin, "<stdin>");
}
exit(0);
}
void
process(FILE *fp, const char *filename)
{
int offset = 0, c, ret;
int state = 0;
char outc;
while ((c = getc(fp)) != EOF) {
offset++;
again:
switch(ret = unvis(&outc, (char)c, &state, 0)) {
case UNVIS_VALID:
putchar(outc);
break;
case UNVIS_VALIDPUSH:
putchar(outc);
goto again;
case UNVIS_SYNBAD:
warnx("%s: offset: %d: can't decode", filename, offset);
state = 0;
break;
case 0:
case UNVIS_NOCHAR:
break;
default:
errx(1, "bad return value (%d), can't happen", ret);
/* NOTREACHED */
}
}
if (unvis(&outc, (char)0, &state, UNVIS_END) == UNVIS_VALID)
putchar(outc);
}
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