text_cmds/lam/lam.c

   1 /*-
   2  * Copyright (c) 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #ifndef lint
  35 static const char copyright[] =
  36 "@(#) Copyright (c) 1993\n\
  37         The Regents of the University of California.  All rights reserved.\n";
  38 #endif /* not lint */
  39
  40 #ifndef lint
  41 #if 0
  42 static char sccsid[] = "@(#)lam.c       8.1 (Berkeley) 6/6/93";
  43 #endif
  44 #endif /* not lint */
  45 #include <sys/cdefs.h>
  46 __FBSDID("$FreeBSD: src/usr.bin/lam/lam.c,v 1.14 2005/08/05 01:04:36 jmallett Exp $");
  47
  48 /*
  49  *      lam - laminate files
  50  *      Author:  John Kunze, UCB
  51  */
  52
  53 #include <ctype.h>
  54 #include <err.h>
  55 #include <stdio.h>
  56 #include <stdlib.h>
  57 #include <string.h>
  58 #include <sysexits.h>
  59
  60 #define MAXOFILES       20
  61 #define BIGBUFSIZ       5 * BUFSIZ
  62
  63 struct  openfile {              /* open file structure */
  64         FILE    *fp;            /* file pointer */
  65         short   eof;            /* eof flag */
  66         short   pad;            /* pad flag for missing columns */
  67         char    eol;            /* end of line character */
  68         const char *sepstring;  /* string to print before each line */
  69         const char *format;     /* printf(3) style string spec. */
  70 }       input[MAXOFILES];
  71
  72 int     morefiles;              /* set by getargs(), changed by gatherline() */
  73 int     nofinalnl;              /* normally append \n to each output line */
  74 char    line[BIGBUFSIZ];
  75 char    *linep;
  76
  77 static char    *gatherline(struct openfile *);
  78 static void     getargs(char *[]);
  79 static char    *pad(struct openfile *);
  80 static void     usage(void);
  81
  82 int
  83 main(int argc, char *argv[])
  84 {
  85         struct  openfile *ip;
  86
  87         if (argc == 1)
  88                 usage();
  89         getargs(argv);
  90         if (!morefiles)
  91                 usage();
  92         for (;;) {
  93                 linep = line;
  94                 for (ip = input; ip->fp != NULL; ip++)
  95                         linep = gatherline(ip);
  96                 if (!morefiles)
  97                         exit(0);
  98                 fputs(line, stdout);
  99                 fputs(ip->sepstring, stdout);
 100                 if (!nofinalnl)
 101                         putchar('\n');
 102         }
 103 }
 104
 105 static void
 106 getargs(char *av[])
 107 {
 108         struct  openfile *ip = input;
 109         char *p, *c;
 110         static char fmtbuf[BUFSIZ];
 111         char *fmtp = fmtbuf;
 112         int P, S, F, T;
 113
 114         P = S = F = T = 0;              /* capitalized options */
 115         while ((p = *++av) != NULL) {
 116                 if (*p != '-' || !p[1]) {
 117                         if (++morefiles >= MAXOFILES)
 118                                 errx(1, "too many input files");
 119                         if (*p == '-')
 120                                 ip->fp = stdin;
 121                         else if ((ip->fp = fopen(p, "r")) == NULL) {
 122                                 err(1, "%s", p);
 123                         }
 124                         ip->pad = P;
 125                         if (!ip->sepstring)
 126                                 ip->sepstring = (S ? (ip-1)->sepstring : "");
 127                         if (!ip->format)
 128                                 ip->format = ((P || F) ? (ip-1)->format : "%s");
 129                         if (!ip->eol)
 130                                 ip->eol = (T ? (ip-1)->eol : '\n');
 131                         ip++;
 132                         continue;
 133                 }
 134                 c = ++p;
 135                 switch (tolower((unsigned char)*c)) {
 136                 case 's':
 137                         if (*++p || (p = *++av))
 138                                 ip->sepstring = p;
 139                         else
 140                                 usage();
 141                         S = (*c == 'S' ? 1 : 0);
 142                         break;
 143                 case 't':
 144                         if (*++p || (p = *++av))
 145                                 ip->eol = *p;
 146                         else
 147                                 usage();
 148                         T = (*c == 'T' ? 1 : 0);
 149                         nofinalnl = 1;
 150                         break;
 151                 case 'p':
 152                         ip->pad = 1;
 153                         P = (*c == 'P' ? 1 : 0);
 154                         /* FALLTHROUGH */
 155                 case 'f':
 156                         F = (*c == 'F' ? 1 : 0);
 157                         if (*++p || (p = *++av)) {
 158                                 fmtp += strlen(fmtp) + 1;
 159                                 if (fmtp >= fmtbuf + sizeof(fmtbuf))
 160                                         errx(1, "no more format space");
 161                                 /* restrict format string to only valid width formatters */
 162                                 if (strspn(p, "-.0123456789") != strlen(p))
 163                                         errx(1, "invalid format string `%s'", p);
 164                                 if (snprintf(fmtp, fmtbuf + sizeof(fmtbuf) - fmtp, "%%%ss", p)
 165                                     >= fmtbuf + sizeof(fmtbuf) - fmtp)
 166                                         errx(1, "no more format space");
 167                                 ip->format = fmtp;
 168                         }
 169                         else
 170                                 usage();
 171                         break;
 172                 default:
 173                         usage();
 174                 }
 175         }
 176         ip->fp = NULL;
 177         if (!ip->sepstring)
 178                 ip->sepstring = "";
 179 }
 180
 181 static char *
 182 pad(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 static char *
 196 gatherline(struct openfile *ip)
 197 {
 198         char s[BUFSIZ];
 199         int c;
 200         char *p;
 201         char *lp = linep;
 202         char *end = s + sizeof(s) - 1;
 203
 204         if (ip->eof)
 205                 return (pad(ip));
 206         for (p = s; (c = fgetc(ip->fp)) != EOF && p < end; p++)
 207                 if ((*p = c) == ip->eol)
 208                         break;
 209         *p = '\0';
 210         if (c == EOF) {
 211                 ip->eof = 1;
 212                 if (ferror(ip->fp)) {
 213                         err(EX_IOERR, NULL);
 214                 }
 215                 if (ip->fp == stdin)
 216                         fclose(stdin);
 217                 morefiles--;
 218                 return (pad(ip));
 219         }
 220         strlcpy(lp, ip->sepstring, line + sizeof(line) - lp);
 221         lp += strlen(lp);
 222         snprintf(lp, line + sizeof(line) - lp, ip->format, s);
 223         lp += strlen(lp);
 224         return (lp);
 225 }
 226
 227 static void
 228 usage()
 229 {
 230         fprintf(stderr, "%s\n%s\n",
 231 "usage: lam [ -f min.max ] [ -s sepstring ] [ -t c ] file ...",
 232 "       lam [ -p min.max ] [ -s sepstring ] [ -t c ] file ...");
 233         exit(1);
 234 }