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 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 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 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 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 272 usage(void) 273 { 274 (void)fprintf(stderr, "usage: paste [-s] [-d delimiters] file ...\n"); 275 exit(1); 276 } 277