paste.c revision 162239 
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: head/usr.bin/paste/paste.c 162239 2006-09-12 05:08:36Z charnier $");
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
64wchar_t *delim;
65int delimcnt;
66
67int parallel(char **);
68int sequential(char **);
69int tr(wchar_t *);
70static void usage(void);
71
72wchar_t tab[] = L"\t";
73
74int
75main(int argc, char *argv[])
76{
77	int ch, rval, seq;
78	wchar_t *warg;
79	const char *arg;
80	size_t len;
81
82	setlocale(LC_CTYPE, "");
83
84	seq = 0;
85	while ((ch = getopt(argc, argv, "d:s")) != -1)
86		switch(ch) {
87		case 'd':
88			arg = optarg;
89			len = mbsrtowcs(NULL, &arg, 0, NULL);
90			if (len == (size_t)-1)
91				err(1, "delimiters");
92			warg = malloc((len + 1) * sizeof(*warg));
93			if (warg == NULL)
94				err(1, NULL);
95			arg = optarg;
96			len = mbsrtowcs(warg, &arg, len + 1, NULL);
97			if (len == (size_t)-1)
98				err(1, "delimiters");
99			delimcnt = tr(delim = warg);
100			break;
101		case 's':
102			seq = 1;
103			break;
104		case '?':
105		default:
106			usage();
107		}
108	argc -= optind;
109	argv += optind;
110
111	if (*argv == NULL)
112		usage();
113	if (!delim) {
114		delimcnt = 1;
115		delim = tab;
116	}
117
118	if (seq)
119		rval = sequential(argv);
120	else
121		rval = parallel(argv);
122	exit(rval);
123}
124
125typedef struct _list {
126	struct _list *next;
127	FILE *fp;
128	int cnt;
129	char *name;
130} LIST;
131
132int
133parallel(char **argv)
134{
135	LIST *lp;
136	int cnt;
137	wint_t ich;
138	wchar_t ch;
139	char *p;
140	LIST *head, *tmp;
141	int opencnt, output;
142
143	for (cnt = 0, head = tmp = NULL; (p = *argv); ++argv, ++cnt) {
144		if ((lp = malloc(sizeof(LIST))) == NULL)
145			err(1, NULL);
146		if (p[0] == '-' && !p[1])
147			lp->fp = stdin;
148		else if (!(lp->fp = fopen(p, "r")))
149			err(1, "%s", p);
150		lp->next = NULL;
151		lp->cnt = cnt;
152		lp->name = p;
153		if (!head)
154			head = tmp = lp;
155		else {
156			tmp->next = lp;
157			tmp = lp;
158		}
159	}
160
161	for (opencnt = cnt; opencnt;) {
162		for (output = 0, lp = head; lp; lp = lp->next) {
163			if (!lp->fp) {
164				if (output && lp->cnt &&
165				    (ch = delim[(lp->cnt - 1) % delimcnt]))
166					putwchar(ch);
167				continue;
168			}
169			if ((ich = getwc(lp->fp)) == WEOF) {
170				if (!--opencnt)
171					break;
172				lp->fp = NULL;
173				if (output && lp->cnt &&
174				    (ch = delim[(lp->cnt - 1) % delimcnt]))
175					putwchar(ch);
176				continue;
177			}
178			/*
179			 * make sure that we don't print any delimiters
180			 * unless there's a non-empty file.
181			 */
182			if (!output) {
183				output = 1;
184				for (cnt = 0; cnt < lp->cnt; ++cnt)
185					if ((ch = delim[cnt % delimcnt]))
186						putwchar(ch);
187			} else if ((ch = delim[(lp->cnt - 1) % delimcnt]))
188				putwchar(ch);
189			if (ich == '\n')
190				continue;
191			do {
192				putwchar(ich);
193			} while ((ich = getwc(lp->fp)) != WEOF && ich != '\n');
194		}
195		if (output)
196			putwchar('\n');
197	}
198
199	return (0);
200}
201
202int
203sequential(char **argv)
204{
205	FILE *fp;
206	int cnt, failed, needdelim;
207	wint_t ch;
208	char *p;
209
210	failed = 0;
211	for (; (p = *argv); ++argv) {
212		if (p[0] == '-' && !p[1])
213			fp = stdin;
214		else if (!(fp = fopen(p, "r"))) {
215			warn("%s", p);
216			failed = 1;
217			continue;
218		}
219		cnt = needdelim = 0;
220		while ((ch = getwc(fp)) != WEOF) {
221			if (needdelim) {
222				needdelim = 0;
223				if (delim[cnt] != '\0')
224					putwchar(delim[cnt]);
225				if (++cnt == delimcnt)
226					cnt = 0;
227			}
228			if (ch != '\n')
229				putwchar(ch);
230			else
231				needdelim = 1;
232		}
233		if (needdelim)
234			putwchar('\n');
235		if (fp != stdin)
236			(void)fclose(fp);
237	}
238
239	return (failed != 0);
240}
241
242int
243tr(wchar_t *arg)
244{
245	int cnt;
246	wchar_t ch, *p;
247
248	for (p = arg, cnt = 0; (ch = *p++); ++arg, ++cnt)
249		if (ch == '\\')
250			switch(ch = *p++) {
251			case 'n':
252				*arg = '\n';
253				break;
254			case 't':
255				*arg = '\t';
256				break;
257			case '0':
258				*arg = '\0';
259				break;
260			default:
261				*arg = ch;
262				break;
263		} else
264			*arg = ch;
265
266	if (!cnt)
267		errx(1, "no delimiters specified");
268	return(cnt);
269}
270
271static void
272usage(void)
273{
274	(void)fprintf(stderr, "usage: paste [-s] [-d delimiters] file ...\n");
275	exit(1);
276}
277