lam.c revision 72153 
1/*-
2 * Copyright (c) 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
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.
20 *
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.
32 */
33
34#ifndef lint
35static const char copyright[] =
36"@(#) Copyright (c) 1993\n\
37	The Regents of the University of California.  All rights reserved.\n";
38#endif /* not lint */
39
40#ifndef lint
41#if 0
42static char sccsid[] = "@(#)lam.c	8.1 (Berkeley) 6/6/93";
43#endif
44static const char rcsid[] =
45  "$FreeBSD: head/usr.bin/lam/lam.c 72153 2001-02-08 05:58:55Z mikeh $";
46#endif /* not lint */
47
48/*
49 *	lam - laminate files
50 *	Author:  John Kunze, UCB
51 */
52
53#include <ctype.h>
54#include <err.h>
55#include <stdio.h>
56#include <stdlib.h>
57#include <string.h>
58
59#define	MAXOFILES	20
60#define	BIGBUFSIZ	5 * BUFSIZ
61
62struct	openfile {		/* open file structure */
63	FILE	*fp;		/* file pointer */
64	short	eof;		/* eof flag */
65	short	pad;		/* pad flag for missing columns */
66	char	eol;		/* end of line character */
67	char	*sepstring;	/* string to print before each line */
68	char	*format;	/* printf(3) style string spec. */
69}	input[MAXOFILES];
70
71int	morefiles;		/* set by getargs(), changed by gatherline() */
72int	nofinalnl;		/* normally append \n to each output line */
73char	line[BIGBUFSIZ];
74char	*linep;
75
76char	*gatherline (struct openfile *);
77void	 getargs (char **);
78char	*pad (struct openfile *);
79static void usage (void);
80
81int
82main(int argc, char **argv)
83{
84	struct	openfile *ip;
85
86	getargs(argv);
87	if (!morefiles)
88		usage();
89	for (;;) {
90		linep = line;
91		for (ip = input; ip->fp != NULL; ip++)
92			linep = gatherline(ip);
93		if (!morefiles)
94			exit(0);
95		fputs(line, stdout);
96		fputs(ip->sepstring, stdout);
97		if (!nofinalnl)
98			putchar('\n');
99	}
100}
101
102void
103getargs(char **av)
104{
105	struct	openfile *ip = input;
106	char *p, *c;
107	static char fmtbuf[BUFSIZ];
108	char *fmtp = fmtbuf;
109	int P, S, F, T;
110
111	P = S = F = T = 0;		/* capitalized options */
112	while ((p = *++av) != NULL) {
113		if (*p != '-' || !p[1]) {
114			if (++morefiles >= MAXOFILES)
115				errx(1, "too many input files");
116			if (*p == '-')
117				ip->fp = stdin;
118			else if ((ip->fp = fopen(p, "r")) == NULL) {
119				err(1, "%s", p);
120			}
121			ip->pad = P;
122			if (!ip->sepstring)
123				ip->sepstring = (S ? (ip-1)->sepstring : "");
124			if (!ip->format)
125				ip->format = ((P || F) ? (ip-1)->format : "%s");
126			if (!ip->eol)
127				ip->eol = (T ? (ip-1)->eol : '\n');
128			ip++;
129			continue;
130		}
131		c = ++p;
132		switch (tolower(*c)) {
133		case 's':
134			if (*++p || (p = *++av))
135				ip->sepstring = p;
136			else
137				errx(1, "need string after -%s", c);
138			S = (*c == 'S' ? 1 : 0);
139			break;
140		case 't':
141			if (*++p || (p = *++av))
142				ip->eol = *p;
143			else
144				errx(1, "need character after -%s", c);
145			T = (*c == 'T' ? 1 : 0);
146			nofinalnl = 1;
147			break;
148		case 'p':
149			ip->pad = 1;
150			P = (*c == 'P' ? 1 : 0);
151			/* FALLTHROUGH */
152		case 'f':
153			F = (*c == 'F' ? 1 : 0);
154			if (*++p || (p = *++av)) {
155				fmtp += strlen(fmtp) + 1;
156				if (fmtp >= fmtbuf + sizeof(fmtbuf))
157					errx(1, "no more format space");
158				/* restrict format string to only valid width formatters */
159				if (strspn(p, "-.0123456789") != strlen(p))
160					errx(1, "invalid format string `%s'", p);
161				if (snprintf(fmtp, fmtbuf + sizeof(fmtbuf) - fmtp, "%%%ss", p)
162				    >= fmtbuf + sizeof(fmtbuf) - fmtp)
163					errx(1, "no more format space");
164				ip->format = fmtp;
165			}
166			else
167				errx(1, "need string after -%s", c);
168			break;
169		default:
170			errx(1, "what do you mean by -%s?", c);
171			break;
172		}
173	}
174	ip->fp = NULL;
175	if (!ip->sepstring)
176		ip->sepstring = "";
177}
178
179char *
180pad(struct openfile *ip)
181{
182	char *lp = linep;
183
184	strlcpy(lp, ip->sepstring, line + sizeof(line) - lp);
185	lp += strlen(lp);
186	if (ip->pad) {
187		snprintf(lp, line + sizeof(line) - lp, ip->format, "");
188		lp += strlen(lp);
189	}
190	return (lp);
191}
192
193char *
194gatherline(struct openfile *ip)
195{
196	char s[BUFSIZ];
197	int c;
198	char *p;
199	char *lp = linep;
200	char *end = s + sizeof(s) - 1;
201
202	if (ip->eof)
203		return (pad(ip));
204	for (p = s; (c = fgetc(ip->fp)) != EOF && p < end; p++)
205		if ((*p = c) == ip->eol)
206			break;
207	*p = '\0';
208	if (c == EOF) {
209		ip->eof = 1;
210		if (ip->fp == stdin)
211			fclose(stdin);
212		morefiles--;
213		return (pad(ip));
214	}
215	strlcpy(lp, ip->sepstring, line + sizeof(line) - lp);
216	lp += strlen(lp);
217	snprintf(lp, line + sizeof(line) - lp, ip->format, s);
218	lp += strlen(lp);
219	return (lp);
220}
221
222static void
223usage()
224{
225	fprintf(stderr, "%s\n%s\n",
226"usage: lam [ -f min.max ] [ -s sepstring ] [ -t c ] file ...",
227"       lam [ -p min.max ] [ -s sepstring ] [ -t c ] file ...");
228	exit(1);
229}
230