Annotation of src/usr.bin/vis/vis.c, Revision 1.22
1.22 ! cheloha 1: /* $OpenBSD: vis.c,v 1.21 2020/08/03 01:08:37 deraadt Exp $ */
1.1 deraadt 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.
1.6 millert 16: * 3. Neither the name of the University nor the names of its contributors
1.1 deraadt 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>
1.17 deraadt 37: #include <limits.h>
1.1 deraadt 38: #include <err.h>
39: #include <vis.h>
40:
1.9 deraadt 41: int eflags, fold, foldwidth=80, none, markeol;
42:
43: #ifdef DEBUG
44: int debug;
45: #endif
1.1 deraadt 46:
1.5 millert 47: int foldit(char *, int, int);
1.9 deraadt 48: void process(FILE *);
1.8 millert 49: __dead void usage(void);
1.1 deraadt 50:
51: int
1.7 deraadt 52: main(int argc, char *argv[])
1.1 deraadt 53: {
1.17 deraadt 54: const char *errstr;
1.1 deraadt 55: FILE *fp;
56: int ch;
57:
1.19 deraadt 58: if (pledge("stdio rpath", NULL) == -1)
59: err(1, "pledge");
1.18 deraadt 60:
1.14 djm 61: while ((ch = getopt(argc, argv, "anwctsobfF:ld")) != -1)
1.15 okan 62: switch(ch) {
1.13 djm 63: case 'a':
64: eflags |= VIS_ALL;
65: break;
1.1 deraadt 66: case 'n':
1.16 deraadt 67: none = 1;
1.1 deraadt 68: break;
69: case 'w':
70: eflags |= VIS_WHITE;
71: break;
72: case 'c':
73: eflags |= VIS_CSTYLE;
74: break;
75: case 't':
76: eflags |= VIS_TAB;
77: break;
78: case 's':
79: eflags |= VIS_SAFE;
80: break;
81: case 'o':
82: eflags |= VIS_OCTAL;
83: break;
84: case 'b':
85: eflags |= VIS_NOSLASH;
86: break;
87: case 'F':
1.17 deraadt 88: foldwidth = strtonum(optarg, 1, INT_MAX, &errstr);
89: if (errstr)
90: errx(1, "%s: %s", optarg, errstr);
91: if (foldwidth < 5)
1.1 deraadt 92: errx(1, "can't fold lines to less than 5 cols");
93: /*FALLTHROUGH*/
94: case 'f':
1.16 deraadt 95: fold = 1; /* fold output lines to 80 cols */
1.1 deraadt 96: break; /* using hidden newline */
97: case 'l':
1.16 deraadt 98: markeol = 1; /* mark end of line with \$ */
1.1 deraadt 99: break;
100: #ifdef DEBUG
101: case 'd':
1.16 deraadt 102: debug = 1;
1.1 deraadt 103: break;
104: #endif
105: default:
1.8 millert 106: usage();
1.1 deraadt 107: }
108: argc -= optind;
109: argv += optind;
110:
111: if (*argv)
112: while (*argv) {
1.20 jsg 113: if ((fp=fopen(*argv, "r")) != NULL) {
1.9 deraadt 114: process(fp);
1.20 jsg 115: fclose(fp);
116: } else
1.1 deraadt 117: warn("%s", *argv);
118: argv++;
119: }
1.18 deraadt 120: else {
1.19 deraadt 121: if (pledge("stdio", NULL) == -1)
122: err(1, "pledge");
1.9 deraadt 123: process(stdin);
1.18 deraadt 124: }
1.1 deraadt 125: exit(0);
126: }
127:
128: void
1.9 deraadt 129: process(FILE *fp)
1.1 deraadt 130: {
131: static int col = 0;
1.21 deraadt 132: char *cp = "\0";
1.4 mpech 133: int c, rachar;
1.1 deraadt 134: char buff[5];
135:
1.21 deraadt 136: cp++; /* so *(cp-1) starts out != '\n' */
1.1 deraadt 137: c = getc(fp);
138: while (c != EOF) {
139: rachar = getc(fp);
140: if (none) {
141: cp = buff;
142: *cp++ = c;
143: if (c == '\\')
144: *cp++ = '\\';
145: *cp = '\0';
146: } else if (markeol && c == '\n') {
147: cp = buff;
148: if ((eflags & VIS_NOSLASH) == 0)
149: *cp++ = '\\';
150: *cp++ = '$';
151: *cp++ = '\n';
152: *cp = '\0';
153: } else
154: (void) vis(buff, (char)c, eflags, (char)rachar);
155:
156: cp = buff;
157: if (fold) {
158: #ifdef DEBUG
159: if (debug)
160: printf("<%02d,", col);
161: #endif
162: col = foldit(cp, col, foldwidth);
163: #ifdef DEBUG
164: if (debug)
165: printf("%02d>", col);
166: #endif
167: }
168: do {
169: putchar(*cp);
170: } while (*++cp);
171: c = rachar;
172: }
173: /*
174: * terminate partial line with a hidden newline
175: */
176: if (fold && *(cp-1) != '\n')
177: printf("\\\n");
1.8 millert 178: }
179:
180: __dead void
181: usage(void)
182: {
183: extern char *__progname;
184:
1.14 djm 185: fprintf(stderr, "usage: %s [-abcflnostw] [-F foldwidth] [file ...]\n",
1.8 millert 186: __progname);
187: exit(1);
1.1 deraadt 188: }
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