usr.bin/paste/paste.c

   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. All advertising materials mentioning features or use of this software
  17  *    must display the following acknowledgement:
  18  *      This product includes software developed by the University of
  19  *      California, Berkeley and its contributors.
  20  * 4. Neither the name of the University nor the names of its contributors
  21  *    may be used to endorse or promote products derived from this software
  22  *    without specific prior written permission.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  34  * SUCH DAMAGE.
  35  */
  36
  37 #ifndef lint
  38 static const char copyright[] =
  39 "@(#) Copyright (c) 1989, 1993\n\
  40         The Regents of the University of California.  All rights reserved.\n";
  41 #endif /* not lint */
  42
  43 #if 0
  44 #ifndef lint
  45 static char sccsid[] = "@(#)paste.c     8.1 (Berkeley) 6/6/93";
  46 #endif /* not lint */
  47 #endif
  48
  49 #include <sys/cdefs.h>
  50 __FBSDID("$FreeBSD$");
  51
  52 #include <sys/types.h>
  53
  54 #include <err.h>
  55 #include <errno.h>
  56 #include <limits.h>
  57 #include <locale.h>
  58 #include <stdio.h>
  59 #include <stdlib.h>
  60 #include <string.h>
  61 #include <unistd.h>
  62 #include <wchar.h>
  63
  64 wchar_t *delim;
  65 int delimcnt;
  66
  67 int parallel(char **);
  68 int sequential(char **);
  69 int tr(wchar_t *);
  70 static void usage(void);
  71
  72 wchar_t tab[] = L"\t";
  73
  74 int
  75 main(int argc, char *argv[])
  76 {
  77         int ch, rval, seq;
  78         wchar_t *warg;
  79         const char *arg;
  80         size_t len;
  81
  82         setlocale(LC_CTYPE, "");
  83
  84         seq = 0;
  85         while ((ch = getopt(argc, argv, "d:s")) != -1)
  86                 switch(ch) {
  87                 case 'd':
  88                         arg = optarg;
  89                         len = mbsrtowcs(NULL, &arg, 0, NULL);
  90                         if (len == (size_t)-1)
  91                                 err(1, "delimiters");
  92                         warg = malloc((len + 1) * sizeof(*warg));
  93                         if (warg == NULL)
  94                                 err(1, NULL);
  95                         arg = optarg;
  96                         len = mbsrtowcs(warg, &arg, len + 1, NULL);
  97                         if (len == (size_t)-1)
  98                                 err(1, "delimiters");
  99                         delimcnt = tr(delim = warg);
 100                         break;
 101                 case 's':
 102                         seq = 1;
 103                         break;
 104                 case '?':
 105                 default:
 106                         usage();
 107                 }
 108         argc -= optind;
 109         argv += optind;
 110
 111         if (*argv == NULL)
 112                 usage();
 113         if (!delim) {
 114                 delimcnt = 1;
 115                 delim = tab;
 116         }
 117
 118         if (seq)
 119                 rval = sequential(argv);
 120         else
 121                 rval = parallel(argv);
 122         exit(rval);
 123 }
 124
 125 typedef struct _list {
 126         struct _list *next;
 127         FILE *fp;
 128         int cnt;
 129         char *name;
 130 } LIST;
 131
 132 int
 133 parallel(char **argv)
 134 {
 135         LIST *lp;
 136         int cnt;
 137         wint_t ich;
 138         wchar_t ch;
 139         char *p;
 140         LIST *head, *tmp;
 141         int opencnt, output;
 142
 143         for (cnt = 0, head = tmp = NULL; (p = *argv); ++argv, ++cnt) {
 144                 if ((lp = malloc(sizeof(LIST))) == NULL)
 145                         err(1, NULL);
 146                 if (p[0] == '-' && !p[1])
 147                         lp->fp = stdin;
 148                 else if (!(lp->fp = fopen(p, "r")))
 149                         err(1, "%s", p);
 150                 lp->next = NULL;
 151                 lp->cnt = cnt;
 152                 lp->name = p;
 153                 if (!head)
 154                         head = tmp = lp;
 155                 else {
 156                         tmp->next = lp;
 157                         tmp = lp;
 158                 }
 159         }
 160
 161         for (opencnt = cnt; opencnt;) {
 162                 for (output = 0, lp = head; lp; lp = lp->next) {
 163                         if (!lp->fp) {
 164                                 if (output && lp->cnt &&
 165                                     (ch = delim[(lp->cnt - 1) % delimcnt]))
 166                                         putwchar(ch);
 167                                 continue;
 168                         }
 169                         if ((ich = getwc(lp->fp)) == WEOF) {
 170                                 if (!--opencnt)
 171                                         break;
 172                                 lp->fp = NULL;
 173                                 if (output && lp->cnt &&
 174                                     (ch = delim[(lp->cnt - 1) % delimcnt]))
 175                                         putwchar(ch);
 176                                 continue;
 177                         }
 178                         /*
 179                          * make sure that we don't print any delimiters
 180                          * unless there's a non-empty file.
 181                          */
 182                         if (!output) {
 183                                 output = 1;
 184                                 for (cnt = 0; cnt < lp->cnt; ++cnt)
 185                                         if ((ch = delim[cnt % delimcnt]))
 186                                                 putwchar(ch);
 187                         } else if ((ch = delim[(lp->cnt - 1) % delimcnt]))
 188                                 putwchar(ch);
 189                         if (ich == '\n')
 190                                 continue;
 191                         do {
 192                                 putwchar(ich);
 193                         } while ((ich = getwc(lp->fp)) != WEOF && ich != '\n');
 194                 }
 195                 if (output)
 196                         putwchar('\n');
 197         }
 198
 199         return (0);
 200 }
 201
 202 int
 203 sequential(char **argv)
 204 {
 205         FILE *fp;
 206         int cnt, failed, needdelim;
 207         wint_t ch;
 208         char *p;
 209
 210         failed = 0;
 211         for (; (p = *argv); ++argv) {
 212                 if (p[0] == '-' && !p[1])
 213                         fp = stdin;
 214                 else if (!(fp = fopen(p, "r"))) {
 215                         warn("%s", p);
 216                         failed = 1;
 217                         continue;
 218                 }
 219                 cnt = needdelim = 0;
 220                 while ((ch = getwc(fp)) != WEOF) {
 221                         if (needdelim) {
 222                                 needdelim = 0;
 223                                 if (delim[cnt] != '\0')
 224                                         putwchar(delim[cnt]);
 225                                 if (++cnt == delimcnt)
 226                                         cnt = 0;
 227                         }
 228                         if (ch != '\n')
 229                                 putwchar(ch);
 230                         else
 231                                 needdelim = 1;
 232                 }
 233                 if (needdelim)
 234                         putwchar('\n');
 235                 if (fp != stdin)
 236                         (void)fclose(fp);
 237         }
 238
 239         return (failed != 0);
 240 }
 241
 242 int
 243 tr(wchar_t *arg)
 244 {
 245         int cnt;
 246         wchar_t ch, *p;
 247
 248         for (p = arg, cnt = 0; (ch = *p++); ++arg, ++cnt)
 249                 if (ch == '\\')
 250                         switch(ch = *p++) {
 251                         case 'n':
 252                                 *arg = '\n';
 253                                 break;
 254                         case 't':
 255                                 *arg = '\t';
 256                                 break;
 257                         case '0':
 258                                 *arg = '\0';
 259                                 break;
 260                         default:
 261                                 *arg = ch;
 262                                 break;
 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 }