1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1989, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * This code is derived from software contributed to Berkeley by
8 * Adam S. Moskowitz of Menlo Consulting.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34
35 #ifndef lint
36 static const char copyright[] =
37 "@(#) Copyright (c) 1989, 1993\n\
38 The Regents of the University of California. All rights reserved.\n";
39 #endif /* not lint */
40
41 #if 0
42 #ifndef lint
43 static char sccsid[] = "@(#)paste.c 8.1 (Berkeley) 6/6/93";
44 #endif /* not lint */
45 #endif
46
47 #include <sys/cdefs.h>
48 __FBSDID("$FreeBSD$");
49
50 #include <sys/types.h>
51
52 #include <err.h>
53 #include <errno.h>
54 #include <limits.h>
55 #include <locale.h>
56 #include <stdio.h>
57 #include <stdlib.h>
58 #include <string.h>
59 #include <unistd.h>
60 #include <wchar.h>
61
62 static wchar_t *delim;
63 static int delimcnt;
64
65 static int parallel(char **);
66 static int sequential(char **);
67 static int tr(wchar_t *);
68 static void usage(void);
69
70 static wchar_t tab[] = L"\t";
71
72 int
main(int argc,char * argv[])73 main(int argc, char *argv[])
74 {
75 int ch, rval, seq;
76 wchar_t *warg;
77 const char *arg;
78 size_t len;
79
80 setlocale(LC_CTYPE, "");
81
82 seq = 0;
83 while ((ch = getopt(argc, argv, "d:s")) != -1)
84 switch(ch) {
85 case 'd':
86 arg = optarg;
87 len = mbsrtowcs(NULL, &arg, 0, NULL);
88 if (len == (size_t)-1)
89 err(1, "delimiters");
90 warg = malloc((len + 1) * sizeof(*warg));
91 if (warg == NULL)
92 err(1, NULL);
93 arg = optarg;
94 len = mbsrtowcs(warg, &arg, len + 1, NULL);
95 if (len == (size_t)-1)
96 err(1, "delimiters");
97 delimcnt = tr(delim = warg);
98 break;
99 case 's':
100 seq = 1;
101 break;
102 case '?':
103 default:
104 usage();
105 }
106 argc -= optind;
107 argv += optind;
108
109 if (*argv == NULL)
110 usage();
111 if (!delim) {
112 delimcnt = 1;
113 delim = tab;
114 }
115
116 if (seq)
117 rval = sequential(argv);
118 else
119 rval = parallel(argv);
120 exit(rval);
121 }
122
123 typedef struct _list {
124 struct _list *next;
125 FILE *fp;
126 int cnt;
127 char *name;
128 } LIST;
129
130 static int
parallel(char ** argv)131 parallel(char **argv)
132 {
133 LIST *lp;
134 int cnt;
135 wint_t ich;
136 wchar_t ch;
137 char *p;
138 LIST *head, *tmp;
139 int opencnt, output;
140
141 for (cnt = 0, head = tmp = NULL; (p = *argv); ++argv, ++cnt) {
142 if ((lp = malloc(sizeof(LIST))) == NULL)
143 err(1, NULL);
144 if (p[0] == '-' && !p[1])
145 lp->fp = stdin;
146 else if (!(lp->fp = fopen(p, "r")))
147 err(1, "%s", p);
148 lp->next = NULL;
149 lp->cnt = cnt;
150 lp->name = p;
151 if (!head)
152 head = tmp = lp;
153 else {
154 tmp->next = lp;
155 tmp = lp;
156 }
157 }
158
159 for (opencnt = cnt; opencnt;) {
160 for (output = 0, lp = head; lp; lp = lp->next) {
161 if (!lp->fp) {
162 if (output && lp->cnt &&
163 (ch = delim[(lp->cnt - 1) % delimcnt]))
164 putwchar(ch);
165 continue;
166 }
167 if ((ich = getwc(lp->fp)) == WEOF) {
168 if (!--opencnt)
169 break;
170 lp->fp = NULL;
171 if (output && lp->cnt &&
172 (ch = delim[(lp->cnt - 1) % delimcnt]))
173 putwchar(ch);
174 continue;
175 }
176 /*
177 * make sure that we don't print any delimiters
178 * unless there's a non-empty file.
179 */
180 if (!output) {
181 output = 1;
182 for (cnt = 0; cnt < lp->cnt; ++cnt)
183 if ((ch = delim[cnt % delimcnt]))
184 putwchar(ch);
185 } else if ((ch = delim[(lp->cnt - 1) % delimcnt]))
186 putwchar(ch);
187 if (ich == '\n')
188 continue;
189 do {
190 putwchar(ich);
191 } while ((ich = getwc(lp->fp)) != WEOF && ich != '\n');
192 }
193 if (output)
194 putwchar('\n');
195 }
196
197 return (0);
198 }
199
200 static int
sequential(char ** argv)201 sequential(char **argv)
202 {
203 FILE *fp;
204 int cnt, failed, needdelim;
205 wint_t ch;
206 char *p;
207
208 failed = 0;
209 for (; (p = *argv); ++argv) {
210 if (p[0] == '-' && !p[1])
211 fp = stdin;
212 else if (!(fp = fopen(p, "r"))) {
213 warn("%s", p);
214 failed = 1;
215 continue;
216 }
217 cnt = needdelim = 0;
218 while ((ch = getwc(fp)) != WEOF) {
219 if (needdelim) {
220 needdelim = 0;
221 if (delim[cnt] != '\0')
222 putwchar(delim[cnt]);
223 if (++cnt == delimcnt)
224 cnt = 0;
225 }
226 if (ch != '\n')
227 putwchar(ch);
228 else
229 needdelim = 1;
230 }
231 if (needdelim)
232 putwchar('\n');
233 if (fp != stdin)
234 (void)fclose(fp);
235 }
236
237 return (failed != 0);
238 }
239
240 static int
tr(wchar_t * arg)241 tr(wchar_t *arg)
242 {
243 int cnt;
244 wchar_t ch, *p;
245
246 for (p = arg, cnt = 0; (ch = *p++); ++arg, ++cnt)
247 if (ch == '\\')
248 switch(ch = *p++) {
249 case 'n':
250 *arg = '\n';
251 break;
252 case 't':
253 *arg = '\t';
254 break;
255 case '0':
256 *arg = '\0';
257 break;
258 default:
259 *arg = ch;
260 break;
261 } else
262 *arg = ch;
263
264 if (!cnt)
265 errx(1, "no delimiters specified");
266 return(cnt);
267 }
268
269 static void
usage(void)270 usage(void)
271 {
272 (void)fprintf(stderr, "usage: paste [-s] [-d delimiters] file ...\n");
273 exit(1);
274 }
275