OpenBSD-4.6/usr.bin/lam/lam.c
/* $OpenBSD: lam.c,v 1.13 2007/06/26 05:14:52 ray Exp $ */
/* $NetBSD: lam.c,v 1.2 1994/11/14 20:27:42 jtc 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.
*/
#ifndef lint
static const char copyright[] =
"@(#) Copyright (c) 1993\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#ifndef lint
#if 0
static const char sccsid[] = "@(#)lam.c 8.1 (Berkeley) 6/6/93";
#endif
static const char rcsid[] = "$OpenBSD: lam.c,v 1.13 2007/06/26 05:14:52 ray Exp $";
#endif /* not lint */
/*
* lam - laminate files
* Author: John Kunze, UCB
*/
#include <sys/param.h>
#include <ctype.h>
#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#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[NOFILE_MAX + 1]; /* last one is for the last -s arg. */
#define INPUTSIZE sizeof(input) / sizeof(*input)
int numfiles; /* number of open files */
int nofinalnl; /* normally append \n to each output line */
char line[BIGBUFSIZ];
char *linep;
void usage(void);
char *gatherline(struct openfile *);
void getargs(int, char *[]);
char *pad(struct openfile *);
int
main(int argc, char *argv[])
{
int i;
/* Process arguments, set numfiles to file argument count. */
getargs(argc, argv);
if (numfiles == 0)
usage();
/* Concatenate lines from each file, then print. */
for (;;) {
linep = line;
/*
* For each file that has a line to print, numfile is
* incremented. Thus if numfiles is 0, we are done.
*/
numfiles = 0;
for (i = 0; i < INPUTSIZE - 1 && input[i].fp != NULL; i++)
linep = gatherline(&input[i]);
if (numfiles == 0)
exit(0);
fputs(line, stdout);
/* Print terminating -s argument. */
fputs(input[i].sepstring, stdout);
if (!nofinalnl)
putchar('\n');
}
}
void
getargs(int argc, char *argv[])
{
struct openfile *ip = input;
char *p;
int ch, P, S, F, T;
size_t siz;
P = S = F = T = 0; /* capitalized options */
while (optind < argc) {
switch (ch = getopt(argc, argv, "F:f:P:p:S:s:T:t:")) {
case 'F': case 'f':
F = (ch == 'F');
/* Validate format string argument. */
for (p = optarg; *p != '\0'; p++)
if (!isdigit(*p) && *p != '.' && *p != '-')
errx(1, "%s: invalid width specified",
optarg);
/* '%' + width + 's' + '\0' */
siz = p - optarg + 3;
if ((p = realloc(ip->format, siz)) == NULL)
err(1, NULL);
snprintf(p, siz, "%%%ss", optarg);
ip->format = p;
break;
case 'P': case 'p':
P = (ch == 'P');
ip->pad = 1;
break;
case 'S': case 's':
S = (ch == 'S');
ip->sepstring = optarg;
break;
case 'T': case 't':
T = (ch == 'T');
if (strlen(optarg) != 1)
usage();
ip->eol = optarg[0];
nofinalnl = 1;
break;
case -1:
if (optind >= argc)
break; /* to support "--" */
/* This is a file, not a flag. */
++numfiles;
if (numfiles >= INPUTSIZE)
errx(1, "too many files");
if (strcmp(argv[optind], "-") == 0)
ip->fp = stdin;
else if ((ip->fp = fopen(argv[optind], "r")) == NULL)
err(1, "%s", argv[optind]);
ip->pad = P;
if (ip->sepstring == NULL)
ip->sepstring = S ? (ip-1)->sepstring : "";
if (ip->format == NULL)
ip->format = (P || F) ? (ip-1)->format : "%s";
if (ip->eol == '\0')
ip->eol = T ? (ip-1)->eol : '\n';
ip++;
optind++;
break;
default:
usage();
/* NOTREACHED */
}
}
ip->fp = NULL;
if (ip->sepstring == NULL)
ip->sepstring = "";
}
char *
pad(struct openfile *ip)
{
size_t n;
char *lp = linep;
n = strlcpy(lp, ip->sepstring, line + sizeof(line) - lp);
lp += (n < line + sizeof(line) - lp) ? n : strlen(lp);
if (ip->pad) {
n = snprintf(lp, line + sizeof(line) - lp, ip->format, "");
if (n > 0)
lp += (n < line + sizeof(line) - lp) ? n : strlen(lp);
}
return (lp);
}
/*
* Grab line from file, appending to linep. Increments numfiles if file
* is still open.
*/
char *
gatherline(struct openfile *ip)
{
size_t n;
char s[BUFSIZ];
char *p;
char *lp = linep;
char *end = s + BUFSIZ - 1;
int c;
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);
return (pad(ip));
}
/* Something will be printed. */
numfiles++;
n = strlcpy(lp, ip->sepstring, line + sizeof(line) - lp);
lp += (n < line + sizeof(line) - lp) ? n : strlen(lp);
n = snprintf(lp, line + sizeof(line) - lp, ip->format, s);
if (n > 0)
lp += (n < line + sizeof(line) - lp) ? n : strlen(lp);
return (lp);
}
void
usage(void)
{
extern char *__progname;
fprintf(stderr,
"usage: %s [-f min.max] [-p min.max] [-s sepstring] [-t c] file ...\n",
__progname);
exit(1);
}