1 /* 2 * Copyright (c) 1989, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Adam S. Moskowitz of Menlo Consulting. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * @(#) Copyright (c) 1989, 1993 The Regents of the University of California. All rights reserved. 33 * @(#)paste.c 8.1 (Berkeley) 6/6/93 34 * $FreeBSD: src/usr.bin/paste/paste.c,v 1.6.2.2 2002/07/14 15:16:00 tjr Exp $ 35 * $DragonFly: src/usr.bin/paste/paste.c,v 1.3 2004/12/15 23:11:06 cpressey Exp $ 36 */ 37 38 #include <sys/types.h> 39 40 #include <err.h> 41 #include <errno.h> 42 #include <limits.h> 43 #include <stdio.h> 44 #include <stdlib.h> 45 #include <string.h> 46 #include <unistd.h> 47 48 char *delim; 49 int delimcnt; 50 51 int parallel(char **); 52 int sequential(char **); 53 int tr(char *); 54 static void usage(void); 55 56 char tab[] = "\t"; 57 58 int 59 main(int argc, char *argv[]) 60 { 61 int ch, rval, seq; 62 63 seq = 0; 64 while ((ch = getopt(argc, argv, "d:s")) != -1) 65 switch(ch) { 66 case 'd': 67 delimcnt = tr(delim = optarg); 68 break; 69 case 's': 70 seq = 1; 71 break; 72 case '?': 73 default: 74 usage(); 75 } 76 argc -= optind; 77 argv += optind; 78 79 if (*argv == NULL) 80 usage(); 81 if (!delim) { 82 delimcnt = 1; 83 delim = tab; 84 } 85 86 if (seq) 87 rval = sequential(argv); 88 else 89 rval = parallel(argv); 90 exit(rval); 91 } 92 93 typedef struct _list { 94 struct _list *next; 95 FILE *fp; 96 int cnt; 97 char *name; 98 } LIST; 99 100 int 101 parallel(char **argv) 102 { 103 LIST *lp; 104 int cnt; 105 char ch, *buf, *p; 106 LIST *head, *tmp; 107 int opencnt, output; 108 size_t len; 109 110 tmp = NULL; 111 for (cnt = 0, head = NULL; (p = *argv); ++argv, ++cnt) { 112 if ((lp = malloc(sizeof(LIST))) == NULL) 113 err(1, NULL); 114 if (p[0] == '-' && !p[1]) 115 lp->fp = stdin; 116 else if (!(lp->fp = fopen(p, "r"))) 117 err(1, "%s", p); 118 lp->next = NULL; 119 lp->cnt = cnt; 120 lp->name = p; 121 if (!head) 122 head = tmp = lp; 123 else { 124 tmp->next = lp; 125 tmp = lp; 126 } 127 } 128 129 for (opencnt = cnt; opencnt;) { 130 for (output = 0, lp = head; lp; lp = lp->next) { 131 if (!lp->fp) { 132 if (output && lp->cnt && 133 (ch = delim[(lp->cnt - 1) % delimcnt])) 134 putchar(ch); 135 continue; 136 } 137 if ((buf = fgetln(lp->fp, &len)) == NULL) { 138 if (!--opencnt) 139 break; 140 lp->fp = NULL; 141 if (output && lp->cnt && 142 (ch = delim[(lp->cnt - 1) % delimcnt])) 143 putchar(ch); 144 continue; 145 } 146 /* 147 * make sure that we don't print any delimiters 148 * unless there's a non-empty file. 149 */ 150 if (!output) { 151 output = 1; 152 for (cnt = 0; cnt < lp->cnt; ++cnt) 153 if ((ch = delim[cnt % delimcnt])) 154 putchar(ch); 155 } else if ((ch = delim[(lp->cnt - 1) % delimcnt])) 156 putchar(ch); 157 if (buf[len - 1] == '\n') 158 len--; 159 fwrite(buf, 1, len, stdout); 160 } 161 if (output) 162 putchar('\n'); 163 } 164 165 return (0); 166 } 167 168 int 169 sequential(char **argv) 170 { 171 FILE *fp; 172 int cnt, failed, needdelim; 173 char *buf, *p; 174 size_t len; 175 176 failed = 0; 177 for (; (p = *argv); ++argv) { 178 if (p[0] == '-' && !p[1]) 179 fp = stdin; 180 else if (!(fp = fopen(p, "r"))) { 181 warn("%s", p); 182 failed = 1; 183 continue; 184 } 185 cnt = needdelim = 0; 186 while ((buf = fgetln(fp, &len)) != NULL) { 187 if (needdelim) { 188 needdelim = 0; 189 if (delim[cnt] != '\0') 190 putchar(delim[cnt]); 191 if (++cnt == delimcnt) 192 cnt = 0; 193 } 194 if (buf[len - 1] == '\n') 195 len--; 196 fwrite(buf, 1, len, stdout); 197 needdelim = 1; 198 } 199 if (needdelim) 200 putchar('\n'); 201 if (fp != stdin) 202 (void)fclose(fp); 203 } 204 205 return (failed != 0); 206 } 207 208 int 209 tr(char *arg) 210 { 211 int cnt; 212 char ch, *p; 213 214 for (p = arg, cnt = 0; (ch = *p++); ++arg, ++cnt) 215 if (ch == '\\') 216 switch(ch = *p++) { 217 case 'n': 218 *arg = '\n'; 219 break; 220 case 't': 221 *arg = '\t'; 222 break; 223 case '0': 224 *arg = '\0'; 225 break; 226 default: 227 *arg = ch; 228 break; 229 } else 230 *arg = ch; 231 232 if (!cnt) 233 errx(1, "no delimiters specified"); 234 return(cnt); 235 } 236 237 static void 238 usage(void) 239 { 240 (void)fprintf(stderr, "usage: paste [-s] [-d delimiters] file ...\n"); 241 exit(1); 242 } 243