diff options
Diffstat (limited to 'usr.bin/unvis/unvis.c')
| -rw-r--r-- | usr.bin/unvis/unvis.c | 147 |
1 files changed, 147 insertions, 0 deletions
diff --git a/usr.bin/unvis/unvis.c b/usr.bin/unvis/unvis.c new file mode 100644 index 0000000..82cad81 --- /dev/null +++ b/usr.bin/unvis/unvis.c @@ -0,0 +1,147 @@ +/*- + * 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 char copyright[] = +"@(#) Copyright (c) 1989, 1993\n\ + The Regents of the University of California. All rights reserved.\n"; +#endif /* not lint */ + +#ifndef lint +static char sccsid[] = "@(#)unvis.c 8.1 (Berkeley) 6/6/93"; +#endif /* not lint */ + +#include <stdio.h> +#include <vis.h> + +char *Program; +#define usage() fprintf(stderr, "usage: %s %s\n", Program, USAGE) +#define USAGE "[file...]" + +main(argc, argv) + char *argv[]; +{ + FILE *fp; + extern char *optarg; + extern int optind; + int ch; + + Program = argv[0]; + while ((ch = getopt(argc, argv, "")) != EOF) + switch((char)ch) { + case '?': + default: + usage(); + exit(1); + } + argc -= optind; + argv += optind; + + if (*argv) + while (*argv) { + if ((fp=fopen(*argv, "r")) != NULL) + process(fp, *argv); + else + syserror("%s", *argv); + argv++; + } + else + process(stdin, "<stdin>"); + exit(0); +} + +process(fp, filename) + FILE *fp; + char *filename; +{ + register 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: + error("%s: offset: %d: can't decode", filename, offset); + state = 0; + break; + case 0: + case UNVIS_NOCHAR: + break; + default: + error("bad return value (%d), can't happen", ret); + exit(1); + } + } + if (unvis(&outc, (char)0, &state, UNVIS_END) == UNVIS_VALID) + putchar(outc); +} + +#include <varargs.h> + +error(va_alist) + va_dcl +{ + char *fmt; + va_list ap; + extern errno; + + fprintf(stderr, "%s: ", Program); + va_start(ap); + fmt = va_arg(ap, char *); + (void) vfprintf(stderr, fmt, ap); + va_end(ap); + fprintf(stderr, "\n"); +} + +syserror(va_alist) + va_dcl +{ + char *fmt; + va_list ap; + extern errno; + + fprintf(stderr, "%s: ", Program); + va_start(ap); + fmt = va_arg(ap, char *); + (void) vfprintf(stderr, fmt, ap); + va_end(ap); + fprintf(stderr, ": %s\n", strerror(errno)); +} |
