kern_recvmsg() may not return a valid(non-NULL) pointer to `sa'
[dragonfly.git] / usr.bin / lam / lam.c
blob6f93f0de00af13e658bcfe9962ff17b9dbe15ff8
1 /*-
2 * Copyright (c) 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
33 * @(#) Copyright (c) 1993 The Regents of the University of California. All rights reserved.
34 * @(#)lam.c 8.1 (Berkeley) 6/6/93
35 * $FreeBSD: src/usr.bin/lam/lam.c,v 1.3.2.3 2001/08/11 03:03:19 mike Exp $
36 * $DragonFly: src/usr.bin/lam/lam.c,v 1.3 2003/10/04 20:36:47 hmp Exp $
40 * lam - laminate files
41 * Author: John Kunze, UCB
44 #include <ctype.h>
45 #include <err.h>
46 #include <stdio.h>
47 #include <stdlib.h>
48 #include <string.h>
50 #define MAXOFILES 20
51 #define BIGBUFSIZ 5 * BUFSIZ
53 struct openfile { /* open file structure */
54 FILE *fp; /* file pointer */
55 short eof; /* eof flag */
56 short pad; /* pad flag for missing columns */
57 char eol; /* end of line character */
58 const char *sepstring; /* string to print before each line */
59 const char *format; /* printf(3) style string spec. */
60 } input[MAXOFILES];
62 int morefiles; /* set by getargs(), changed by gatherline() */
63 int nofinalnl; /* normally append \n to each output line */
64 char line[BIGBUFSIZ];
65 char *linep;
67 static char *gatherline(struct openfile *);
68 static void getargs(char *[]);
69 static char *pad(struct openfile *);
70 static void usage(void);
72 int
73 main(int argc __unused, char *argv[])
75 struct openfile *ip;
77 getargs(argv);
78 if (!morefiles)
79 usage();
80 for (;;) {
81 linep = line;
82 for (ip = input; ip->fp != NULL; ip++)
83 linep = gatherline(ip);
84 if (!morefiles)
85 exit(0);
86 fputs(line, stdout);
87 fputs(ip->sepstring, stdout);
88 if (!nofinalnl)
89 putchar('\n');
93 static void
94 getargs(char *av[])
96 struct openfile *ip = input;
97 char *p, *c;
98 static char fmtbuf[BUFSIZ];
99 char *fmtp = fmtbuf;
100 int P, S, F, T;
102 P = S = F = T = 0; /* capitalized options */
103 while ((p = *++av) != NULL) {
104 if (*p != '-' || !p[1]) {
105 if (++morefiles >= MAXOFILES)
106 errx(1, "too many input files");
107 if (*p == '-')
108 ip->fp = stdin;
109 else if ((ip->fp = fopen(p, "r")) == NULL) {
110 err(1, "%s", p);
112 ip->pad = P;
113 if (!ip->sepstring)
114 ip->sepstring = (S ? (ip-1)->sepstring : "");
115 if (!ip->format)
116 ip->format = ((P || F) ? (ip-1)->format : "%s");
117 if (!ip->eol)
118 ip->eol = (T ? (ip-1)->eol : '\n');
119 ip++;
120 continue;
122 c = ++p;
123 switch (tolower(*c)) {
124 case 's':
125 if (*++p || (p = *++av))
126 ip->sepstring = p;
127 else
128 errx(1, "need string after -%s", c);
129 S = (*c == 'S' ? 1 : 0);
130 break;
131 case 't':
132 if (*++p || (p = *++av))
133 ip->eol = *p;
134 else
135 errx(1, "need character after -%s", c);
136 T = (*c == 'T' ? 1 : 0);
137 nofinalnl = 1;
138 break;
139 case 'p':
140 ip->pad = 1;
141 P = (*c == 'P' ? 1 : 0);
142 /* FALLTHROUGH */
143 case 'f':
144 F = (*c == 'F' ? 1 : 0);
145 if (*++p || (p = *++av)) {
146 fmtp += strlen(fmtp) + 1;
147 if (fmtp >= fmtbuf + sizeof(fmtbuf))
148 errx(1, "no more format space");
149 /* restrict format string to only valid width formatters */
150 if (strspn(p, "-.0123456789") != strlen(p))
151 errx(1, "invalid format string `%s'", p);
152 if (snprintf(fmtp, fmtbuf + sizeof(fmtbuf) - fmtp, "%%%ss", p)
153 >= fmtbuf + sizeof(fmtbuf) - fmtp)
154 errx(1, "no more format space");
155 ip->format = fmtp;
157 else
158 errx(1, "need string after -%s", c);
159 break;
160 default:
161 errx(1, "what do you mean by -%s?", c);
162 break;
165 ip->fp = NULL;
166 if (!ip->sepstring)
167 ip->sepstring = "";
170 static char *
171 pad(struct openfile *ip)
173 char *lp = linep;
175 strlcpy(lp, ip->sepstring, line + sizeof(line) - lp);
176 lp += strlen(lp);
177 if (ip->pad) {
178 snprintf(lp, line + sizeof(line) - lp, ip->format, "");
179 lp += strlen(lp);
181 return (lp);
184 static char *
185 gatherline(struct openfile *ip)
187 char s[BUFSIZ];
188 int c;
189 char *p;
190 char *lp = linep;
191 char *end = s + sizeof(s) - 1;
193 if (ip->eof)
194 return (pad(ip));
195 for (p = s; (c = fgetc(ip->fp)) != EOF && p < end; p++)
196 if ((*p = c) == ip->eol)
197 break;
198 *p = '\0';
199 if (c == EOF) {
200 ip->eof = 1;
201 if (ip->fp == stdin)
202 fclose(stdin);
203 morefiles--;
204 return (pad(ip));
206 strlcpy(lp, ip->sepstring, line + sizeof(line) - lp);
207 lp += strlen(lp);
208 snprintf(lp, line + sizeof(line) - lp, ip->format, s);
209 lp += strlen(lp);
210 return (lp);
213 static void
214 usage(void)
216 fprintf(stderr, "%s\n%s\n",
217 "usage: lam [ -f min.max ] [ -s sepstring ] [ -t c ] file ...",
218 " lam [ -p min.max ] [ -s sepstring ] [ -t c ] file ...");
219 exit(1);