NetBSD-5.0.2/usr.bin/lam/lam.c
/* $NetBSD: lam.c,v 1.6 2008/07/21 14:19:23 lukem Exp $ */
/*-
* Copyright (c) 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
#ifndef lint
__COPYRIGHT("@(#) Copyright (c) 1993\
The Regents of the University of California. All rights reserved.");
#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "@(#)lam.c 8.1 (Berkeley) 6/6/93";
#endif
__RCSID("$NetBSD: lam.c,v 1.6 2008/07/21 14:19:23 lukem Exp $");
#endif /* not lint */
/*
* lam - laminate files
* Author: John Kunze, UCB
*/
#include <ctype.h>
#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define MAXOFILES 20
#define BIGBUFSIZ 5 * BUFSIZ
struct openfile { /* open file structure */
FILE *fp; /* file pointer */
short eof; /* eof flag */
short pad; /* pad flag for missing columns */
char eol; /* end of line character */
char *sepstring; /* string to print before each line */
char *format; /* printf(3) style string spec. */
} input[MAXOFILES];
int morefiles; /* set by getargs(), changed by gatherline() */
int nofinalnl; /* normally append \n to each output line */
char line[BIGBUFSIZ];
char *linep;
void error __P((char *, char *));
char *gatherline __P((struct openfile *));
void getargs __P((char *[]));
int main __P((int, char **));
char *pad __P((struct openfile *));
int
main(argc, argv)
int argc;
char *argv[];
{
struct openfile *ip;
getargs(argv);
if (!morefiles)
error("lam - laminate files", "");
for (;;) {
linep = line;
for (ip = input; ip->fp != NULL; ip++)
linep = gatherline(ip);
if (!morefiles)
exit(0);
fputs(line, stdout);
fputs(ip->sepstring, stdout);
if (!nofinalnl)
putchar('\n');
}
}
void
getargs(av)
char *av[];
{
struct openfile *ip = input;
char *p, *c;
static char fmtbuf[BUFSIZ];
char *fmtp = fmtbuf;
int P, S, F, T;
P = S = F = T = 0; /* capitalized options */
while ((p = *++av) != NULL) {
if (*p != '-' || !p[1]) {
if (++morefiles >= MAXOFILES)
errx(1, "too many input files");
if (*p == '-')
ip->fp = stdin;
else if ((ip->fp = fopen(p, "r")) == NULL)
errx(1, "open %s", p);
ip->pad = P;
if (!ip->sepstring)
ip->sepstring = (S ? (ip-1)->sepstring : "");
if (!ip->format)
ip->format = ((P || F) ? (ip-1)->format : "%s");
if (!ip->eol)
ip->eol = (T ? (ip-1)->eol : '\n');
ip++;
continue;
}
c = ++p;
switch (tolower((unsigned char) *c)) {
case 's':
if (*++p || (p = *++av))
ip->sepstring = p;
else
error("Need string after -%s", c);
S = (*c == 'S' ? 1 : 0);
break;
case 't':
if (*++p || (p = *++av))
ip->eol = *p;
else
error("Need character after -%s", c);
T = (*c == 'T' ? 1 : 0);
nofinalnl = 1;
break;
case 'p':
ip->pad = 1;
P = (*c == 'P' ? 1 : 0);
/* FALLTHROUGH */
case 'f':
F = (*c == 'F' ? 1 : 0);
if (*++p || (p = *++av)) {
fmtp += strlen(fmtp) + 1;
if (fmtp >= fmtbuf + sizeof(fmtbuf))
errx(1, "no more format space");
/* restrict format string to only valid width formatters */
if (strspn(p, "-.0123456789") != strlen(p))
errx(1, "invalid format string `%s'", p);
if (snprintf(fmtp, fmtbuf + sizeof(fmtbuf) - fmtp, "%%%ss", p)
>= fmtbuf + sizeof(fmtbuf) - fmtp)
errx(1, "no more format space");
sprintf(fmtp, "%%%ss", p);
ip->format = fmtp;
}
else
error("Need string after -%s", c);
break;
default:
error("What do you mean by -%s?", c);
break;
}
}
ip->fp = NULL;
if (!ip->sepstring)
ip->sepstring = "";
}
char *
pad(ip)
struct openfile *ip;
{
char *lp = linep;
strlcpy(lp, ip->sepstring, line + sizeof(line) - lp);
lp += strlen(lp);
if (ip->pad) {
snprintf(lp, line + sizeof(line) - lp, ip->format, "");
lp += strlen(lp);
}
return (lp);
}
char *
gatherline(ip)
struct openfile *ip;
{
char s[BUFSIZ];
int c;
char *p;
char *lp = linep;
char *end = s + sizeof(s) - 1;
if (ip->eof)
return (pad(ip));
for (p = s; (c = fgetc(ip->fp)) != EOF && p < end; p++)
if ((*p = c) == ip->eol)
break;
*p = '\0';
if (c == EOF) {
ip->eof = 1;
if (ip->fp == stdin)
fclose(stdin);
morefiles--;
return (pad(ip));
}
strlcpy(lp, ip->sepstring, line + sizeof(line) - lp);
lp += strlen(lp);
snprintf(lp, line + sizeof(line) - lp, ip->format, s);
lp += strlen(lp);
return (lp);
}
void
error(msg, s)
char *msg, *s;
{
warnx(msg, s);
fprintf(stderr,
"\nUsage: lam [ -[fp] min.max ] [ -s sepstring ] [ -t c ] file ...\n");
if (strncmp("lam - ", msg, 6) == 0)
fprintf(stderr, "Options:\n\t%s\t%s\t%s\t%s\t%s",
"-f min.max field widths for file fragments\n",
"-p min.max like -f, but pad missing fragments\n",
"-s sepstring fragment separator\n",
"-t c input line terminator is c, no \\n after output lines\n",
"Capitalized options affect more than one file.\n");
exit(1);
}