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#if 0
44#ifndef lint
45static char sccsid[] = "@(#)paste.c	8.1 (Berkeley) 6/6/93";
46#endif /* not lint */
47#endif
48
49#include <sys/cdefs.h>
50__FBSDID("$FreeBSD: src/usr.bin/paste/paste.c,v 1.14 2004/06/25 01:48:43 tjr Exp $");
51
52#include <sys/types.h>
53
54#include <err.h>
55#include <errno.h>
56#include <limits.h>
57#include <locale.h>
58#include <stdio.h>
59#include <stdlib.h>
60#include <string.h>
61#include <unistd.h>
62#include <wchar.h>
63#include <sysexits.h>
64
65wchar_t *delim;
66int delimcnt;
67
68int parallel(char **);
69int sequential(char **);
70int tr(wchar_t *);
71static void usage(void);
72
73wchar_t tab[] = L"\t";
74
75int
76main(int argc, char *argv[])
77{
78	int ch, rval, seq;
79	wchar_t *warg;
80	const char *arg;
81	size_t len;
82
83	setlocale(LC_CTYPE, "");
84
85	seq = 0;
86	while ((ch = getopt(argc, argv, "d:s")) != -1)
87		switch(ch) {
88		case 'd':
89			arg = optarg;
90			len = mbsrtowcs(NULL, &arg, 0, NULL);
91			if (len == (size_t)-1)
92				err(1, "delimiters");
93			warg = malloc((len + 1) * sizeof(*warg));
94			if (warg == NULL)
95				err(1, NULL);
96			arg = optarg;
97			len = mbsrtowcs(warg, &arg, len + 1, NULL);
98			if (len == (size_t)-1)
99				err(1, "delimiters");
100			delimcnt = tr(delim = warg);
101			break;
102		case 's':
103			seq = 1;
104			break;
105		case '?':
106		default:
107			usage();
108		}
109	argc -= optind;
110	argv += optind;
111
112	if (*argv == NULL)
113		usage();
114	if (!delim) {
115		delimcnt = 1;
116		delim = tab;
117	}
118
119	if (seq)
120		rval = sequential(argv);
121	else
122		rval = parallel(argv);
123	exit(rval);
124}
125
126typedef struct _list {
127	struct _list *next;
128	FILE *fp;
129	int cnt;
130	char *name;
131} LIST;
132
133int
134parallel(char **argv)
135{
136	LIST *lp;
137	int cnt;
138	wint_t ich;
139	wchar_t ch;
140	char *p;
141	LIST *head, *tmp;
142	int opencnt, output;
143
144	for (cnt = 0, head = NULL; (p = *argv); ++argv, ++cnt) {
145		if ((lp = malloc(sizeof(LIST))) == NULL)
146			err(1, NULL);
147		if (p[0] == '-' && !p[1])
148			lp->fp = stdin;
149		else if (!(lp->fp = fopen(p, "r")))
150			err(1, "%s", p);
151		lp->next = NULL;
152		lp->cnt = cnt;
153		lp->name = p;
154		if (!head)
155			head = tmp = lp;
156		else {
157			tmp->next = lp;
158			tmp = lp;
159		}
160	}
161
162	for (opencnt = cnt; opencnt;) {
163		for (output = 0, lp = head; lp; lp = lp->next) {
164			if (!lp->fp) {
165				if (output && lp->cnt &&
166				    (ch = delim[(lp->cnt - 1) % delimcnt]))
167					putwchar(ch);
168				continue;
169			}
170			if ((ich = getwc(lp->fp)) == WEOF) {
171				if (!--opencnt)
172					break;
173				lp->fp = NULL;
174				if (output && lp->cnt &&
175				    (ch = delim[(lp->cnt - 1) % delimcnt]))
176					putwchar(ch);
177				continue;
178			}
179			/*
180			 * make sure that we don't print any delimiters
181			 * unless there's a non-empty file.
182			 */
183			if (!output) {
184				output = 1;
185				for (cnt = 0; cnt < lp->cnt; ++cnt)
186					if ((ch = delim[cnt % delimcnt]))
187						putwchar(ch);
188			} else if ((ch = delim[(lp->cnt - 1) % delimcnt]))
189				putwchar(ch);
190			if (ich == '\n')
191				continue;
192			do {
193				putwchar(ich);
194			} while ((ich = getwc(lp->fp)) != WEOF && ich != '\n');
195			if (ferror(lp->fp)) {
196				errx(EX_IOERR, "Error reading %s", lp->name);
197			}
198		}
199		if (output)
200			putwchar('\n');
201	}
202
203	return (0);
204}
205
206int
207sequential(char **argv)
208{
209	FILE *fp;
210	int cnt, failed, needdelim;
211	wint_t ch;
212	char *p;
213
214	failed = 0;
215	for (; (p = *argv); ++argv) {
216		if (p[0] == '-' && !p[1])
217			fp = stdin;
218		else if (!(fp = fopen(p, "r"))) {
219			warn("%s", p);
220			failed = 1;
221			continue;
222		}
223		cnt = needdelim = 0;
224		while ((ch = getwc(fp)) != WEOF) {
225			if (needdelim) {
226				needdelim = 0;
227				if (delim[cnt] != '\0')
228					putwchar(delim[cnt]);
229				if (++cnt == delimcnt)
230					cnt = 0;
231			}
232			if (ch != '\n')
233				putwchar(ch);
234			else
235				needdelim = 1;
236		}
237		if (needdelim)
238			putwchar('\n');
239		if (fp != stdin)
240			(void)fclose(fp);
241	}
242
243	return (failed != 0);
244}
245
246int
247tr(wchar_t *arg)
248{
249	int cnt;
250	wchar_t ch, *p;
251
252	for (p = arg, cnt = 0; (ch = *p++); ++arg, ++cnt)
253		if (ch == '\\')
254			switch(ch = *p++) {
255			case 'n':
256				*arg = '\n';
257				break;
258			case 't':
259				*arg = '\t';
260				break;
261			case '0':
262				*arg = '\0';
263				break;
264			default:
265				*arg = ch;
266				break;
267		} else
268			*arg = ch;
269
270	if (!cnt)
271		errx(1, "no delimiters specified");
272	return(cnt);
273}
274
275static void
276usage(void)
277{
278	(void)fprintf(stderr, "usage: paste [-s] [-d delimiters] file ...\n");
279	exit(1);
280}
281