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 #include <sys/types.h>
36 #include <sys/queue.h>
37 #include <sys/capsicum.h>
38
39 #include <capsicum_helpers.h>
40 #include <err.h>
41 #include <errno.h>
42 #include <fcntl.h>
43 #include <limits.h>
44 #include <locale.h>
45 #include <stdio.h>
46 #include <stdlib.h>
47 #include <string.h>
48 #include <unistd.h>
49 #include <wchar.h>
50
51 #include <libcasper.h>
52 #include <casper/cap_fileargs.h>
53
54 static wchar_t *delim;
55 static int delimcnt;
56
57 static int parallel(char **, fileargs_t *);
58 static int sequential(char **, fileargs_t *);
59 static int tr(wchar_t *);
60 static void usage(void) __dead2;
61
62 static wchar_t tab[] = L"\t";
63
64 int
main(int argc,char * argv[])65 main(int argc, char *argv[])
66 {
67 int ch, rval, seq;
68 wchar_t *warg;
69 const char *arg;
70 size_t len;
71 fileargs_t *fa;
72 cap_rights_t rights;
73
74 setlocale(LC_CTYPE, "");
75
76 seq = 0;
77 while ((ch = getopt(argc, argv, "d:s")) != -1)
78 switch(ch) {
79 case 'd':
80 arg = optarg;
81 len = mbsrtowcs(NULL, &arg, 0, NULL);
82 if (len == (size_t)-1)
83 err(1, "delimiters");
84 warg = malloc((len + 1) * sizeof(*warg));
85 if (warg == NULL)
86 err(1, NULL);
87 arg = optarg;
88 len = mbsrtowcs(warg, &arg, len + 1, NULL);
89 if (len == (size_t)-1)
90 err(1, "delimiters");
91 delimcnt = tr(delim = warg);
92 break;
93 case 's':
94 seq = 1;
95 break;
96 case '?':
97 default:
98 usage();
99 }
100 argc -= optind;
101 argv += optind;
102
103 if (*argv == NULL)
104 usage();
105 if (!delim) {
106 delimcnt = 1;
107 delim = tab;
108 }
109
110 fa = fileargs_init(argc, argv, O_RDONLY, 0,
111 cap_rights_init(&rights, CAP_READ, CAP_FSTAT, CAP_FCNTL), FA_OPEN);
112 if (fa == NULL)
113 err(1, "unable to open system.fileargs service");
114
115 caph_cache_catpages();
116 if (caph_enter_casper() < 0)
117 err(1, "unable to enter capability mode");
118
119 rval = seq ? sequential(argv, fa) : parallel(argv, fa);
120
121 fileargs_free(fa);
122 exit(rval);
123 }
124
125 typedef struct _list {
126 STAILQ_ENTRY(_list) entries;
127 FILE *fp;
128 int cnt;
129 char *name;
130 } LIST;
131
132 static STAILQ_HEAD(head, _list) lh;
133
134 static int
parallel(char ** argv,fileargs_t * fa)135 parallel(char **argv, fileargs_t *fa)
136 {
137 LIST *lp;
138 int cnt;
139 wint_t ich;
140 wchar_t ch;
141 char *p;
142 int opencnt, output;
143
144 STAILQ_INIT(&lh);
145
146 for (cnt = 0; (p = *argv); ++argv, ++cnt) {
147 if ((lp = malloc(sizeof(LIST))) == NULL)
148 err(1, NULL);
149 if (p[0] == '-' && !p[1])
150 lp->fp = stdin;
151 else if (!(lp->fp = fileargs_fopen(fa, p, "r")))
152 err(1, "%s", p);
153 lp->cnt = cnt;
154 lp->name = p;
155
156 STAILQ_INSERT_TAIL(&lh, lp, entries);
157 }
158
159 for (opencnt = cnt; opencnt;) {
160 output = 0;
161 STAILQ_FOREACH(lp, &lh, entries) {
162 if (!lp->fp) {
163 if (output && lp->cnt &&
164 (ch = delim[(lp->cnt - 1) % delimcnt]))
165 putwchar(ch);
166 continue;
167 }
168 if ((ich = getwc(lp->fp)) == WEOF) {
169 if (!--opencnt)
170 break;
171 lp->fp = NULL;
172 if (output && lp->cnt &&
173 (ch = delim[(lp->cnt - 1) % delimcnt]))
174 putwchar(ch);
175 continue;
176 }
177 /*
178 * make sure that we don't print any delimiters
179 * unless there's a non-empty file.
180 */
181 if (!output) {
182 output = 1;
183 for (cnt = 0; cnt < lp->cnt; ++cnt)
184 if ((ch = delim[cnt % delimcnt]))
185 putwchar(ch);
186 } else if ((ch = delim[(lp->cnt - 1) % delimcnt]))
187 putwchar(ch);
188 if (ich == '\n')
189 continue;
190 do {
191 putwchar(ich);
192 } while ((ich = getwc(lp->fp)) != WEOF && ich != '\n');
193 }
194 if (output)
195 putwchar('\n');
196 }
197
198 return (0);
199 }
200
201 static int
sequential(char ** argv,fileargs_t * fa)202 sequential(char **argv, fileargs_t *fa)
203 {
204 FILE *fp;
205 int cnt, failed, needdelim;
206 wint_t ch;
207 char *p;
208
209 failed = 0;
210 for (; (p = *argv); ++argv) {
211 if (p[0] == '-' && !p[1])
212 fp = stdin;
213 else if (!(fp = fileargs_fopen(fa, p, "r"))) {
214 warn("%s", p);
215 failed = 1;
216 continue;
217 }
218 cnt = needdelim = 0;
219 while ((ch = getwc(fp)) != WEOF) {
220 if (needdelim) {
221 needdelim = 0;
222 if (delim[cnt] != '\0')
223 putwchar(delim[cnt]);
224 if (++cnt == delimcnt)
225 cnt = 0;
226 }
227 if (ch != '\n')
228 putwchar(ch);
229 else
230 needdelim = 1;
231 }
232 if (needdelim)
233 putwchar('\n');
234 if (fp != stdin)
235 (void)fclose(fp);
236 }
237
238 return (failed != 0);
239 }
240
241 static int
tr(wchar_t * arg)242 tr(wchar_t *arg)
243 {
244 int cnt;
245 wchar_t ch, *p;
246
247 for (p = arg, cnt = 0; (ch = *p++); ++arg, ++cnt)
248 if (ch == '\\')
249 switch(ch = *p++) {
250 case 'n':
251 *arg = '\n';
252 break;
253 case 't':
254 *arg = '\t';
255 break;
256 case '0':
257 *arg = '\0';
258 break;
259 default:
260 *arg = ch;
261 break;
262 }
263 else
264 *arg = ch;
265
266 if (!cnt)
267 errx(1, "no delimiters specified");
268 return(cnt);
269 }
270
271 static void
usage(void)272 usage(void)
273 {
274 (void)fprintf(stderr, "usage: paste [-s] [-d delimiters] file ...\n");
275 exit(1);
276 }
277