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