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author | 2021-05-09 14:20:58 -0400 | |
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committer | 2021-05-09 14:20:58 -0400 | |
commit | 5fd83771641d15c418f747bd343ba6738d3875f7 (patch) | |
tree | 5abf0f78f680d9837dbd93d4d4c3933bb7509599 /text_cmds/unvis/unvis.c | |
download | apple_cmds-5fd83771641d15c418f747bd343ba6738d3875f7.tar.gz apple_cmds-5fd83771641d15c418f747bd343ba6738d3875f7.tar.zst apple_cmds-5fd83771641d15c418f747bd343ba6738d3875f7.zip |
Import macOS userland
adv_cmds-176
basic_cmds-55
bootstrap_cmds-116.100.1
developer_cmds-66
diskdev_cmds-667.40.1
doc_cmds-53.60.1
file_cmds-321.40.3
mail_cmds-35
misc_cmds-34
network_cmds-606.40.1
patch_cmds-17
remote_cmds-63
shell_cmds-216.60.1
system_cmds-880.60.2
text_cmds-106
Diffstat (limited to 'text_cmds/unvis/unvis.c')
-rw-r--r-- | text_cmds/unvis/unvis.c | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/text_cmds/unvis/unvis.c b/text_cmds/unvis/unvis.c new file mode 100644 index 0000000..713177b --- /dev/null +++ b/text_cmds/unvis/unvis.c @@ -0,0 +1,126 @@ +/*- + * 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. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. 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. + */ + +#ifndef lint +static const char copyright[] = +"@(#) Copyright (c) 1989, 1993\n\ + The Regents of the University of California. All rights reserved.\n"; +#endif /* not lint */ + +#ifndef lint +#if 0 +static char sccsid[] = "@(#)unvis.c 8.1 (Berkeley) 6/6/93"; +#endif +static const char rcsid[] = + "$FreeBSD: src/usr.bin/unvis/unvis.c,v 1.9 2002/09/04 23:29:08 dwmalone Exp $"; +#endif /* not lint */ + +#include <err.h> +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> +#include <vis.h> +#include <sysexits.h> + +void process(FILE *, const char *); +static void usage(void); + +int +main(int argc, char *argv[]) +{ + FILE *fp; + int ch; + + while ((ch = getopt(argc, argv, "")) != -1) + switch((char)ch) { + case '?': + default: + usage(); + } + argc -= optind; + argv += optind; + + if (*argv) + while (*argv) { + if ((fp=fopen(*argv, "r")) != NULL) + process(fp, *argv); + else + warn("%s", *argv); + argv++; + } + else + process(stdin, "<stdin>"); + exit(0); +} + +static void +usage(void) +{ + fprintf(stderr, "usage: unvis [file ...]\n"); + exit(1); +} + +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); + } + } + if (unvis(&outc, (char)0, &state, UNVIS_END) == UNVIS_VALID) + putchar(outc); + + if (ferror(fp)) + errx(EX_IOERR, "Error reading %s", fp); +} |