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Annotation of src/usr.bin/unvis/unvis.c, Revision 1.15

1.15    ! cheloha     1: /*     $OpenBSD: unvis.c,v 1.14 2015/10/09 01:37:09 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:
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:
1.14      deraadt    46:        if (pledge("stdio rpath", NULL) == -1)
                     47:                err(1, "pledge");
1.13      deraadt    48:
1.3       millert    49:        while ((ch = getopt(argc, argv, "")) != -1)
1.11      okan       50:                switch(ch) {
1.1       deraadt    51:                default:
1.8       sobrado    52:                        (void) fprintf(stderr, "usage: unvis [file ...]\n");
1.1       deraadt    53:                        exit(1);
                     54:                }
                     55:        argc -= optind;
                     56:        argv += optind;
                     57:
                     58:        if (*argv)
                     59:                while (*argv) {
1.12      jsg        60:                        if ((fp=fopen(*argv, "r")) != NULL) {
1.1       deraadt    61:                                process(fp, *argv);
1.12      jsg        62:                                fclose(fp);
                     63:                        } else
1.1       deraadt    64:                                warn("%s", *argv);
                     65:                        argv++;
                     66:                }
1.13      deraadt    67:        else {
1.14      deraadt    68:                if (pledge("stdio", NULL) == -1)
                     69:                        err(1, "pledge");
1.13      deraadt    70:
1.1       deraadt    71:                process(stdin, "<stdin>");
1.13      deraadt    72:        }
1.1       deraadt    73:        exit(0);
                     74: }
                     75:
                     76: void
1.7       deraadt    77: process(FILE *fp, const char *filename)
1.1       deraadt    78: {
1.4       mpech      79:        int offset = 0, c, ret;
1.1       deraadt    80:        int state = 0;
                     81:        char outc;
                     82:
                     83:        while ((c = getc(fp)) != EOF) {
                     84:                offset++;
                     85:        again:
                     86:                switch(ret = unvis(&outc, (char)c, &state, 0)) {
                     87:                case UNVIS_VALID:
                     88:                        putchar(outc);
                     89:                        break;
                     90:                case UNVIS_VALIDPUSH:
                     91:                        putchar(outc);
                     92:                        goto again;
                     93:                case UNVIS_SYNBAD:
                     94:                        warnx("%s: offset: %d: can't decode", filename, offset);
                     95:                        state = 0;
                     96:                        break;
                     97:                case 0:
                     98:                case UNVIS_NOCHAR:
                     99:                        break;
                    100:                default:
                    101:                        errx(1, "bad return value (%d), can't happen", ret);
                    102:                        /* NOTREACHED */
                    103:                }
                    104:        }
                    105:        if (unvis(&outc, (char)0, &state, UNVIS_END) == UNVIS_VALID)
                    106:                putchar(outc);
                    107: }