| File: | src/usr.bin/vis/vis.c |
| Warning: | line 109, column 2 Value stored to 'argc' is never read |
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| 1 | /* $OpenBSD: vis.c,v 1.21 2020/08/03 01:08:37 deraadt Exp $ */ |
| 2 | /* $NetBSD: vis.c,v 1.4 1994/12/20 16:13:03 jtc Exp $ */ |
| 3 | |
| 4 | /*- |
| 5 | * Copyright (c) 1989, 1993 |
| 6 | * The Regents of the University of California. All rights reserved. |
| 7 | * |
| 8 | * Redistribution and use in source and binary forms, with or without |
| 9 | * modification, are permitted provided that the following conditions |
| 10 | * are met: |
| 11 | * 1. Redistributions of source code must retain the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer. |
| 13 | * 2. Redistributions in binary form must reproduce the above copyright |
| 14 | * notice, this list of conditions and the following disclaimer in the |
| 15 | * documentation and/or other materials provided with the distribution. |
| 16 | * 3. Neither the name of the University nor the names of its contributors |
| 17 | * may be used to endorse or promote products derived from this software |
| 18 | * without specific prior written permission. |
| 19 | * |
| 20 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 21 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 22 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 23 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 24 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 25 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 26 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 27 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 28 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 29 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 30 | * SUCH DAMAGE. |
| 31 | */ |
| 32 | |
| 33 | #include <stdio.h> |
| 34 | #include <string.h> |
| 35 | #include <stdlib.h> |
| 36 | #include <unistd.h> |
| 37 | #include <limits.h> |
| 38 | #include <err.h> |
| 39 | #include <vis.h> |
| 40 | |
| 41 | int eflags, fold, foldwidth=80, none, markeol; |
| 42 | |
| 43 | #ifdef DEBUG |
| 44 | int debug; |
| 45 | #endif |
| 46 | |
| 47 | int foldit(char *, int, int); |
| 48 | void process(FILE *); |
| 49 | __dead__attribute__((__noreturn__)) void usage(void); |
| 50 | |
| 51 | int |
| 52 | main(int argc, char *argv[]) |
| 53 | { |
| 54 | const char *errstr; |
| 55 | FILE *fp; |
| 56 | int ch; |
| 57 | |
| 58 | if (pledge("stdio rpath", NULL((void *)0)) == -1) |
| 59 | err(1, "pledge"); |
| 60 | |
| 61 | while ((ch = getopt(argc, argv, "anwctsobfF:ld")) != -1) |
| 62 | switch(ch) { |
| 63 | case 'a': |
| 64 | eflags |= VIS_ALL0x400; |
| 65 | break; |
| 66 | case 'n': |
| 67 | none = 1; |
| 68 | break; |
| 69 | case 'w': |
| 70 | eflags |= VIS_WHITE(0x04 | 0x08 | 0x10); |
| 71 | break; |
| 72 | case 'c': |
| 73 | eflags |= VIS_CSTYLE0x02; |
| 74 | break; |
| 75 | case 't': |
| 76 | eflags |= VIS_TAB0x08; |
| 77 | break; |
| 78 | case 's': |
| 79 | eflags |= VIS_SAFE0x20; |
| 80 | break; |
| 81 | case 'o': |
| 82 | eflags |= VIS_OCTAL0x01; |
| 83 | break; |
| 84 | case 'b': |
| 85 | eflags |= VIS_NOSLASH0x40; |
| 86 | break; |
| 87 | case 'F': |
| 88 | foldwidth = strtonum(optarg, 1, INT_MAX2147483647, &errstr); |
| 89 | if (errstr) |
| 90 | errx(1, "%s: %s", optarg, errstr); |
| 91 | if (foldwidth < 5) |
| 92 | errx(1, "can't fold lines to less than 5 cols"); |
| 93 | /*FALLTHROUGH*/ |
| 94 | case 'f': |
| 95 | fold = 1; /* fold output lines to 80 cols */ |
| 96 | break; /* using hidden newline */ |
| 97 | case 'l': |
| 98 | markeol = 1; /* mark end of line with \$ */ |
| 99 | break; |
| 100 | #ifdef DEBUG |
| 101 | case 'd': |
| 102 | debug = 1; |
| 103 | break; |
| 104 | #endif |
| 105 | case '?': |
| 106 | default: |
| 107 | usage(); |
| 108 | } |
| 109 | argc -= optind; |
Value stored to 'argc' is never read | |
| 110 | argv += optind; |
| 111 | |
| 112 | if (*argv) |
| 113 | while (*argv) { |
| 114 | if ((fp=fopen(*argv, "r")) != NULL((void *)0)) { |
| 115 | process(fp); |
| 116 | fclose(fp); |
| 117 | } else |
| 118 | warn("%s", *argv); |
| 119 | argv++; |
| 120 | } |
| 121 | else { |
| 122 | if (pledge("stdio", NULL((void *)0)) == -1) |
| 123 | err(1, "pledge"); |
| 124 | process(stdin(&__sF[0])); |
| 125 | } |
| 126 | exit(0); |
| 127 | } |
| 128 | |
| 129 | void |
| 130 | process(FILE *fp) |
| 131 | { |
| 132 | static int col = 0; |
| 133 | char *cp = "\0"; |
| 134 | int c, rachar; |
| 135 | char buff[5]; |
| 136 | |
| 137 | cp++; /* so *(cp-1) starts out != '\n' */ |
| 138 | c = getc(fp)(!__isthreaded ? (--(fp)->_r < 0 ? __srget(fp) : (int)( *(fp)->_p++)) : (getc)(fp)); |
| 139 | while (c != EOF(-1)) { |
| 140 | rachar = getc(fp)(!__isthreaded ? (--(fp)->_r < 0 ? __srget(fp) : (int)( *(fp)->_p++)) : (getc)(fp)); |
| 141 | if (none) { |
| 142 | cp = buff; |
| 143 | *cp++ = c; |
| 144 | if (c == '\\') |
| 145 | *cp++ = '\\'; |
| 146 | *cp = '\0'; |
| 147 | } else if (markeol && c == '\n') { |
| 148 | cp = buff; |
| 149 | if ((eflags & VIS_NOSLASH0x40) == 0) |
| 150 | *cp++ = '\\'; |
| 151 | *cp++ = '$'; |
| 152 | *cp++ = '\n'; |
| 153 | *cp = '\0'; |
| 154 | } else |
| 155 | (void) vis(buff, (char)c, eflags, (char)rachar); |
| 156 | |
| 157 | cp = buff; |
| 158 | if (fold) { |
| 159 | #ifdef DEBUG |
| 160 | if (debug) |
| 161 | printf("<%02d,", col); |
| 162 | #endif |
| 163 | col = foldit(cp, col, foldwidth); |
| 164 | #ifdef DEBUG |
| 165 | if (debug) |
| 166 | printf("%02d>", col); |
| 167 | #endif |
| 168 | } |
| 169 | do { |
| 170 | putchar(*cp)(!__isthreaded ? __sputc(*cp, (&__sF[1])) : (putc)(*cp, ( &__sF[1]))); |
| 171 | } while (*++cp); |
| 172 | c = rachar; |
| 173 | } |
| 174 | /* |
| 175 | * terminate partial line with a hidden newline |
| 176 | */ |
| 177 | if (fold && *(cp-1) != '\n') |
| 178 | printf("\\\n"); |
| 179 | } |
| 180 | |
| 181 | __dead__attribute__((__noreturn__)) void |
| 182 | usage(void) |
| 183 | { |
| 184 | extern char *__progname; |
| 185 | |
| 186 | fprintf(stderr(&__sF[2]), "usage: %s [-abcflnostw] [-F foldwidth] [file ...]\n", |
| 187 | __progname); |
| 188 | exit(1); |
| 189 | } |