Annotation of src/usr.bin/banner/banner.c, Revision 1.10
1.10 ! deraadt 1: /* $OpenBSD: banner.c,v 1.9 2009/10/27 23:59:35 deraadt Exp $ */
1.1 deraadt 2: /* $NetBSD: banner.c,v 1.2 1995/04/09 06:00:15 cgd Exp $ */
3:
4: /*
5: * Changes for banner(1)
6: *
7: * @(#)Copyright (c) 1995, Simon J. Gerraty.
8: *
9: * This is free software. It comes with NO WARRANTY.
10: * Permission to use, modify and distribute this source code
11: * is granted subject to the following conditions.
12: * 1/ that the above copyright notice and this notice
13: * are preserved in all copies and that due credit be given
14: * to the author.
15: * 2/ that any changes to this code are clearly commented
16: * as such so that the author does not get blamed for bugs
17: * other than his own.
18: *
19: * Please send copies of changes and bug-fixes to:
20: * sjg@zen.void.oz.au
21: */
22:
23: /*
24: * Copyright (c) 1983, 1993
25: * The Regents of the University of California. All rights reserved.
26: *
27: * Redistribution and use in source and binary forms, with or without
28: * modification, are permitted provided that the following conditions
29: * are met:
30: * 1. Redistributions of source code must retain the above copyright
31: * notice, this list of conditions and the following disclaimer.
32: * 2. Redistributions in binary form must reproduce the above copyright
33: * notice, this list of conditions and the following disclaimer in the
34: * documentation and/or other materials provided with the distribution.
1.7 millert 35: * 3. Neither the name of the University nor the names of its contributors
1.1 deraadt 36: * may be used to endorse or promote products derived from this software
37: * without specific prior written permission.
38: *
39: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
40: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
42: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
43: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
44: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
45: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
46: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
47: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
48: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
49: * SUCH DAMAGE.
50: */
51:
52: #include <stdio.h>
1.3 deraadt 53: #include <unistd.h>
54: #include <stdlib.h>
55: #include <string.h>
1.10 ! deraadt 56: #include <err.h>
1.1 deraadt 57:
58: #include "banner.h"
59:
60: static long PW = LINELEN;
61:
62: /* the char gen code below is lifted from lpd */
63:
64: static char *
1.8 deraadt 65: scnline(int key, char *p, int c)
1.1 deraadt 66: {
1.3 deraadt 67: int scnwidth;
1.1 deraadt 68:
69: /*
70: * <sjg> lpd makes chars out of the letter in question.
71: * the results are somewhat mixed. Sticking to '#' as
72: * banner(1) does is more consistent.
73: */
74: #ifndef NOHASH_ONLY
75: c = '#';
76: #endif
77:
78: for (scnwidth = WIDTH; --scnwidth;) {
79: key <<= 1;
80: *p++ = key & 0200 ? c : BACKGND;
81: }
82: return (p);
83: }
84:
85: #define TRC(q) (((q)-' ')&0177)
86:
87:
88: static int
1.8 deraadt 89: dropit(int c)
1.1 deraadt 90: {
91: switch(c) {
92:
93: case TRC('_'):
94: case TRC(';'):
95: case TRC(','):
96: case TRC('g'):
97: case TRC('j'):
98: case TRC('p'):
99: case TRC('q'):
100: case TRC('y'):
101: return (DROP);
102:
103: default:
104: return (0);
105: }
106: }
107:
108: static void
1.8 deraadt 109: scan_out(int scfd, char *scsp, int dlm)
1.1 deraadt 110: {
1.3 deraadt 111: char *strp;
112: int nchrs, j;
1.1 deraadt 113: char outbuf[LINELEN+1], *sp, c, cc;
114: int d, scnhgt;
115: extern char scnkey[][HEIGHT]; /* in lpdchar.c */
116:
117: for (scnhgt = 0; scnhgt++ < HEIGHT+DROP; ) {
118: strp = &outbuf[0];
119: sp = scsp;
1.6 tedu 120: for (nchrs = 0; *sp != dlm && *sp != '\0'; ) {
121: cc = *sp++;
122: if ((unsigned char)cc < ' ' ||
123: (unsigned char)cc > 0x7f)
124: cc = INVALID;
125:
126: c = TRC(cc);
1.3 deraadt 127: d = dropit(c);
1.1 deraadt 128: if ((!d && scnhgt > HEIGHT) || (scnhgt <= DROP && d))
129: for (j = WIDTH; --j;)
130: *strp++ = BACKGND;
131: else
1.3 deraadt 132: strp = scnline(scnkey[(int)c][scnhgt-1-d], strp, cc);
1.6 tedu 133: if (nchrs++ >= PW/(WIDTH+1)-1)
1.1 deraadt 134: break;
135: *strp++ = BACKGND;
136: #ifdef LPD_CHSET /* <sjg> */
137: *strp++ = BACKGND;
138: #endif
139: }
140: while (*--strp == BACKGND && strp >= outbuf)
141: ;
142: strp++;
143: *strp++ = '\n';
144: (void) write(scfd, outbuf, strp-outbuf);
145: }
146: }
147:
148: /*
149: * for each word, print up to 10 chars in big letters.
150: */
151: int
1.8 deraadt 152: main(int argc, char *argv[])
1.1 deraadt 153: {
154: char word[10+1]; /* strings limited to 10 chars */
155:
1.10 ! deraadt 156: if (tame("stdio", NULL) == -1)
! 157: err(1, "tame");
1.1 deraadt 158: while (*++argv) {
1.4 lebel 159: (void)strlcpy(word, *argv, sizeof (word));
1.1 deraadt 160: scan_out(1, word, '\0');
161: }
162: exit(0);
163: }
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