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