usr.bin/lam/lam.c

   1 /*      $NetBSD: lam.c,v 1.6 2008/07/21 14:19:23 lukem Exp $    */
   2
   3 /*-
   4  * Copyright (c) 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the University nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 #include <sys/cdefs.h>
  33 #ifndef lint
  34 __COPYRIGHT("@(#) Copyright (c) 1993\
  35  The Regents of the University of California.  All rights reserved.");
  36 #endif /* not lint */
  37
  38 #ifndef lint
  39 #if 0
  40 static char sccsid[] = "@(#)lam.c       8.1 (Berkeley) 6/6/93";
  41 #endif
  42 __RCSID("$NetBSD: lam.c,v 1.6 2008/07/21 14:19:23 lukem Exp $");
  43 #endif /* not lint */
  44
  45 /*
  46  *      lam - laminate files
  47  *      Author:  John Kunze, UCB
  48  */
  49
  50 #include <ctype.h>
  51 #include <err.h>
  52 #include <stdio.h>
  53 #include <stdlib.h>
  54 #include <string.h>
  55
  56 #define MAXOFILES       20
  57 #define BIGBUFSIZ       5 * BUFSIZ
  58
  59 struct  openfile {              /* open file structure */
  60         FILE    *fp;            /* file pointer */
  61         short   eof;            /* eof flag */
  62         short   pad;            /* pad flag for missing columns */
  63         char    eol;            /* end of line character */
  64         const char *sepstring;  /* string to print before each line */
  65         const char *format;     /* printf(3) style string spec. */
  66 }       input[MAXOFILES];
  67
  68 int     morefiles;              /* set by getargs(), changed by gatherline() */
  69 int     nofinalnl;              /* normally append \n to each output line */
  70 char    line[BIGBUFSIZ];
  71 char    *linep;
  72
  73 void     error __P((const char *, const char *));
  74 char    *gatherline __P((struct openfile *));
  75 void     getargs __P((char *[]));
  76 int      main __P((int, char **));
  77 char    *pad __P((struct openfile *));
  78
  79 int
  80 main(argc, argv)
  81         int argc;
  82         char *argv[];
  83 {
  84         struct  openfile *ip;
  85
  86         getargs(argv);
  87         if (!morefiles)
  88                 error("lam - laminate files", "");
  89         for (;;) {
  90                 linep = line;
  91                 for (ip = input; ip->fp != NULL; ip++)
  92                         linep = gatherline(ip);
  93                 if (!morefiles)
  94                         exit(0);
  95                 fputs(line, stdout);
  96                 fputs(ip->sepstring, stdout);
  97                 if (!nofinalnl)
  98                         putchar('\n');
  99         }
 100 }
 101
 102 void
 103 getargs(av)
 104         char *av[];
 105 {
 106         struct openfile *ip = input;
 107         char *p, *c;
 108         static char fmtbuf[BUFSIZ];
 109         char *fmtp = fmtbuf;
 110         int P, S, F, T;
 111
 112         P = S = F = T = 0;              /* capitalized options */
 113         while ((p = *++av) != NULL) {
 114                 if (*p != '-' || !p[1]) {
 115                         if (++morefiles >= MAXOFILES)
 116                                 errx(1, "too many input files");
 117                         if (*p == '-')
 118                                 ip->fp = stdin;
 119                         else if ((ip->fp = fopen(p, "r")) == NULL)
 120                                 errx(1, "open %s", p);
 121                         ip->pad = P;
 122                         if (!ip->sepstring)
 123                                 ip->sepstring = (S ? (ip-1)->sepstring : "");
 124                         if (!ip->format)
 125                                 ip->format = ((P || F) ? (ip-1)->format : "%s");
 126                         if (!ip->eol)
 127                                 ip->eol = (T ? (ip-1)->eol : '\n');
 128                         ip++;
 129                         continue;
 130                 }
 131                 c = ++p;
 132                 switch (tolower((unsigned char) *c)) {
 133                 case 's':
 134                         if (*++p || (p = *++av))
 135                                 ip->sepstring = p;
 136                         else
 137                                 error("Need string after -%s", c);
 138                         S = (*c == 'S' ? 1 : 0);
 139                         break;
 140                 case 't':
 141                         if (*++p || (p = *++av))
 142                                 ip->eol = *p;
 143                         else
 144                                 error("Need character after -%s", c);
 145                         T = (*c == 'T' ? 1 : 0);
 146                         nofinalnl = 1;
 147                         break;
 148                 case 'p':
 149                         ip->pad = 1;
 150                         P = (*c == 'P' ? 1 : 0);
 151                         /* FALLTHROUGH */
 152                 case 'f':
 153                         F = (*c == 'F' ? 1 : 0);
 154                         if (*++p || (p = *++av)) {
 155                                 fmtp += strlen(fmtp) + 1;
 156                                 if (fmtp >= fmtbuf + sizeof(fmtbuf))
 157                                         errx(1, "no more format space");
 158                                 /* restrict format string to only valid width formatters */
 159                                 if (strspn(p, "-.0123456789") != strlen(p))
 160                                         errx(1, "invalid format string `%s'", p);
 161                                 if (snprintf(fmtp, fmtbuf + sizeof(fmtbuf) - fmtp, "%%%ss", p)
 162                                         >= fmtbuf + sizeof(fmtbuf) - fmtp)
 163                                                 errx(1, "no more format space");
 164                                 sprintf(fmtp, "%%%ss", p);
 165                                 ip->format = fmtp;
 166                         }
 167                         else
 168                                 error("Need string after -%s", c);
 169                         break;
 170                 default:
 171                         error("What do you mean by -%s?", c);
 172                         break;
 173                 }
 174         }
 175         ip->fp = NULL;
 176         if (!ip->sepstring)
 177                 ip->sepstring = "";
 178 }
 179
 180 char *
 181 pad(ip)
 182         struct openfile *ip;
 183 {
 184         char *lp = linep;
 185
 186         strlcpy(lp, ip->sepstring, line + sizeof(line) - lp);
 187         lp += strlen(lp);
 188         if (ip->pad) {
 189                 snprintf(lp, line + sizeof(line) - lp, ip->format, "");
 190                 lp += strlen(lp);
 191         }
 192         return (lp);
 193 }
 194
 195 char *
 196 gatherline(ip)
 197         struct openfile *ip;
 198 {
 199         char s[BUFSIZ];
 200         int c;
 201         char *p;
 202         char *lp = linep;
 203         char *end = s + sizeof(s) - 1;
 204
 205         if (ip->eof)
 206                 return (pad(ip));
 207         for (p = s; (c = fgetc(ip->fp)) != EOF && p < end; p++)
 208                 if ((*p = c) == ip->eol)
 209                         break;
 210         *p = '\0';
 211         if (c == EOF) {
 212                 ip->eof = 1;
 213                 if (ip->fp == stdin)
 214                         fclose(stdin);
 215                 morefiles--;
 216                 return (pad(ip));
 217         }
 218         strlcpy(lp, ip->sepstring, line + sizeof(line) - lp);
 219         lp += strlen(lp);
 220         snprintf(lp, line + sizeof(line) - lp, ip->format, s);
 221         lp += strlen(lp);
 222         return (lp);
 223 }
 224
 225 void
 226 error(const char *msg, const char *s)
 227 {
 228         warnx(msg, s);
 229         fprintf(stderr,
 230 "\nUsage:  lam [ -[fp] min.max ] [ -s sepstring ] [ -t c ] file ...\n");
 231         if (strncmp("lam - ", msg, 6) == 0)
 232                 fprintf(stderr, "Options:\n\t%s\t%s\t%s\t%s\t%s",
 233                     "-f min.max field widths for file fragments\n",
 234                     "-p min.max like -f, but pad missing fragments\n",
 235                     "-s sepstring       fragment separator\n",
 236 "-t c           input line terminator is c, no \\n after output lines\n",
 237                     "Capitalized options affect more than one file.\n");
 238         exit(1);
 239 }