paste.c revision 33644 
1/*
2 * Copyright (c) 1989, 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Adam S. Moskowitz of Menlo Consulting.
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. All advertising materials mentioning features or use of this software
17 *    must display the following acknowledgement:
18 *	This product includes software developed by the University of
19 *	California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 *    may be used to endorse or promote products derived from this software
22 *    without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 */
36
37#ifndef lint
38static const char copyright[] =
39"@(#) Copyright (c) 1989, 1993\n\
40	The Regents of the University of California.  All rights reserved.\n";
41#endif /* not lint */
42
43#ifndef lint
44#if 0
45static char sccsid[] = "@(#)paste.c	8.1 (Berkeley) 6/6/93";
46#endif
47static const char rcsid[] =
48	"$Id: paste.c,v 1.4 1997/08/05 03:40:04 asami Exp $";
49#endif /* not lint */
50
51#include <sys/types.h>
52#include <err.h>
53#include <errno.h>
54#include <limits.h>
55#include <stdio.h>
56#include <stdlib.h>
57#include <string.h>
58#include <unistd.h>
59
60char *delim;
61int delimcnt;
62
63void parallel __P((char **));
64void sequential __P((char **));
65int tr __P((char *));
66static void usage __P((void));
67
68int
69main(argc, argv)
70	int argc;
71	char **argv;
72{
73	int ch, seq;
74
75	seq = 0;
76	while ((ch = getopt(argc, argv, "d:s")) != -1)
77		switch(ch) {
78		case 'd':
79			delimcnt = tr(delim = optarg);
80			break;
81		case 's':
82			seq = 1;
83			break;
84		case '?':
85		default:
86			usage();
87		}
88	argc -= optind;
89	argv += optind;
90
91	if (!delim) {
92		delimcnt = 1;
93		delim = "\t";
94	}
95
96	if (seq)
97		sequential(argv);
98	else
99		parallel(argv);
100	exit(0);
101}
102
103typedef struct _list {
104	struct _list *next;
105	FILE *fp;
106	int cnt;
107	char *name;
108} LIST;
109
110void
111parallel(argv)
112	char **argv;
113{
114	register LIST *lp;
115	register int cnt;
116	register char ch, *p;
117	LIST *head, *tmp;
118	int opencnt, output;
119	char buf[_POSIX2_LINE_MAX + 1];
120
121	for (cnt = 0, head = NULL; (p = *argv); ++argv, ++cnt) {
122		if (!(lp = (LIST *)malloc((u_int)sizeof(LIST))))
123			errx(1, "%s", strerror(ENOMEM));
124		if (p[0] == '-' && !p[1])
125			lp->fp = stdin;
126		else if (!(lp->fp = fopen(p, "r")))
127			err(1, "%s", p);
128		lp->next = NULL;
129		lp->cnt = cnt;
130		lp->name = p;
131		if (!head)
132			head = tmp = lp;
133		else {
134			tmp->next = lp;
135			tmp = lp;
136		}
137	}
138
139	for (opencnt = cnt; opencnt;) {
140		for (output = 0, lp = head; lp; lp = lp->next) {
141			if (!lp->fp) {
142				if (output && lp->cnt &&
143				    (ch = delim[(lp->cnt - 1) % delimcnt]))
144					putchar(ch);
145				continue;
146			}
147			if (!fgets(buf, sizeof(buf), lp->fp)) {
148				if (!--opencnt)
149					break;
150				lp->fp = NULL;
151				if (output && lp->cnt &&
152				    (ch = delim[(lp->cnt - 1) % delimcnt]))
153					putchar(ch);
154				continue;
155			}
156			if (!(p = index(buf, '\n')))
157				errx(1, "%s: input line too long", lp->name);
158			*p = '\0';
159			/*
160			 * make sure that we don't print any delimiters
161			 * unless there's a non-empty file.
162			 */
163			if (!output) {
164				output = 1;
165				for (cnt = 0; cnt < lp->cnt; ++cnt)
166					if ((ch = delim[cnt % delimcnt]))
167						putchar(ch);
168			} else if ((ch = delim[(lp->cnt - 1) % delimcnt]))
169				putchar(ch);
170			(void)printf("%s", buf);
171		}
172		if (output)
173			putchar('\n');
174	}
175}
176
177void
178sequential(argv)
179	char **argv;
180{
181	register FILE *fp;
182	register int cnt;
183	register char ch, *p, *dp;
184	char buf[_POSIX2_LINE_MAX + 1];
185
186	for (; (p = *argv); ++argv) {
187		if (p[0] == '-' && !p[1])
188			fp = stdin;
189		else if (!(fp = fopen(p, "r"))) {
190			warn("%s", p);
191			continue;
192		}
193		if (fgets(buf, sizeof(buf), fp)) {
194			for (cnt = 0, dp = delim;;) {
195				if (!(p = index(buf, '\n')))
196					errx(1, "%s: input line too long", *argv);
197				*p = '\0';
198				(void)printf("%s", buf);
199				if (!fgets(buf, sizeof(buf), fp))
200					break;
201				if ((ch = *dp++))
202					putchar(ch);
203				if (++cnt == delimcnt) {
204					dp = delim;
205					cnt = 0;
206				}
207			}
208			putchar('\n');
209		}
210		if (fp != stdin)
211			(void)fclose(fp);
212	}
213}
214
215int
216tr(arg)
217	char *arg;
218{
219	register int cnt;
220	register char ch, *p;
221
222	for (p = arg, cnt = 0; (ch = *p++); ++arg, ++cnt)
223		if (ch == '\\')
224			switch(ch = *p++) {
225			case 'n':
226				*arg = '\n';
227				break;
228			case 't':
229				*arg = '\t';
230				break;
231			case '0':
232				*arg = '\0';
233				break;
234			default:
235				*arg = ch;
236				break;
237		} else
238			*arg = ch;
239
240	if (!cnt)
241		errx(1, "no delimiters specified");
242	return(cnt);
243}
244
245static void
246usage()
247{
248	(void)fprintf(stderr, "usage: paste [-s] [-d delimiters] file ...\n");
249	exit(1);
250}
251