282 lines
7.1 KiB
C
282 lines
7.1 KiB
C
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/* $OpenBSD: lam.c,v 1.24 2021/12/03 15:15:22 deraadt Exp $ */
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/* $NetBSD: lam.c,v 1.2 1994/11/14 20:27:42 jtc Exp $ */
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/*-
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* Copyright (c) 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* lam - laminate files
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* Author: John Kunze, UCB
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*/
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#include <sys/types.h>
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#include <ctype.h>
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#include <err.h>
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#include <locale.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <limits.h>
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#include <string.h>
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#include <unistd.h>
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#define BIGBUFSIZ 5 * BUFSIZ
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struct openfile { /* open file structure */
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FILE *fp; /* file pointer */
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int minwidth; /* pad this column to this width */
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int maxwidth; /* truncate this column */
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short eof; /* eof flag */
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short pad; /* pad flag for missing columns */
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char eol; /* end of line character */
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char align; /* '0' for zero fill, '-' for left align */
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char *sepstring; /* string to print before each line */
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} *input;
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int inputsize; /* number of openfile entries */
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int output; /* line output produced */
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int nofinalnl; /* normally append \n to each output line */
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char line[BIGBUFSIZ];
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char *linep;
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int mbswidth_truncate(char *, int); /* utf8.c */
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void usage(void);
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char *gatherline(struct openfile *);
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void getargs(int, char *[]);
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char *pad(struct openfile *);
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int
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main(int argc, char *argv[])
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{
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int i;
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setlocale(LC_CTYPE, "");
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if (pledge("stdio rpath", NULL) == -1)
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err(1, "pledge");
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getargs(argc, argv);
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if (inputsize == 0)
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usage();
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if (pledge("stdio", NULL) == -1)
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err(1, "pledge");
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/* Concatenate lines from each file, then print. */
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for (;;) {
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linep = line;
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/*
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* For each file that has a line to print, output is
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* incremented. Thus if numfiles is 0, we are done.
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*/
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output = 0;
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for (i = 0; i < inputsize && input[i].fp != NULL; i++)
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linep = gatherline(&input[i]);
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if (output == 0)
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exit(0);
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fputs(line, stdout);
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/* Print terminating -s argument. */
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fputs(input[i].sepstring, stdout);
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if (!nofinalnl)
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putchar('\n');
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}
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}
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void
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getargs(int argc, char *argv[])
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{
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struct openfile *ip;
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const char *errstr;
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char *p, *q;
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void *tmp;
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int ch, P, S, F, T;
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input = calloc(inputsize+1, sizeof *input);
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if (input == NULL)
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errx(1, "too many files");
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ip = &input[inputsize];
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P = S = F = T = 0; /* capitalized options */
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while (optind < argc) {
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switch (ch = getopt(argc, argv, "F:f:P:p:S:s:T:t:")) {
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case 'P': case 'p':
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P = (ch == 'P');
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ip->pad = 1;
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/* FALLTHROUGH */
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case 'F': case 'f':
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F = (ch == 'F');
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/* Validate format string argument. */
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p = optarg;
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if (*p == '0' || *p == '-')
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ip->align = *p++;
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else
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ip->align = ' ';
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if ((q = strchr(p, '.')) != NULL)
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*q++ = '\0';
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if (*p != '\0') {
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ip->minwidth = strtonum(p, 1, INT_MAX,
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&errstr);
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if (errstr != NULL)
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errx(1, "minimum width is %s: %s",
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errstr, p);
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}
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if (q != NULL) {
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ip->maxwidth = strtonum(q, 1, INT_MAX,
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&errstr);
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if (errstr != NULL)
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errx(1, "maximum width is %s: %s",
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errstr, q);
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} else
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ip->maxwidth = INT_MAX;
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break;
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case 'S': case 's':
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S = (ch == 'S');
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ip->sepstring = optarg;
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break;
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case 'T': case 't':
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T = (ch == 'T');
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if (strlen(optarg) != 1)
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usage();
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ip->eol = optarg[0];
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nofinalnl = 1;
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break;
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case -1:
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if (optind >= argc)
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break; /* to support "--" */
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/* This is a file, not a flag. */
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if (strcmp(argv[optind], "-") == 0)
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ip->fp = stdin;
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else if ((ip->fp = fopen(argv[optind], "r")) == NULL)
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err(1, "%s", argv[optind]);
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ip->pad = P;
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if (ip->sepstring == NULL)
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ip->sepstring = S ? (ip-1)->sepstring : "";
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if (ip->eol == '\0')
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ip->eol = T ? (ip-1)->eol : '\n';
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if (ip->align == '\0') {
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if (F || P) {
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ip->align = (ip-1)->align;
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ip->minwidth = (ip-1)->minwidth;
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ip->maxwidth = (ip-1)->maxwidth;
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} else
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ip->maxwidth = INT_MAX;
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}
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++inputsize;
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/* Prepare for next file argument */
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tmp = recallocarray(input, inputsize,
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inputsize+1, sizeof *input);
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if (tmp == NULL)
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errx(1, "too many files");
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input = tmp;
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ip = &input[inputsize];
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optind++;
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break;
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default:
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usage();
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/* NOTREACHED */
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}
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}
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ip->fp = NULL;
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if (ip->sepstring == NULL)
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ip->sepstring = "";
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}
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char *
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pad(struct openfile *ip)
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{
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size_t n;
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char *lp = linep;
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int i = 0;
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n = strlcpy(lp, ip->sepstring, line + sizeof(line) - lp);
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lp += (n < line + sizeof(line) - lp) ? n : strlen(lp);
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if (ip->pad)
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while (i++ < ip->minwidth && lp + 1 < line + sizeof(line))
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*lp++ = ' ';
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*lp = '\0';
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return (lp);
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}
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/*
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* Grab line from file, appending to linep. Increments printed if file
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* is still open.
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*/
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char *
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gatherline(struct openfile *ip)
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{
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size_t n;
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char s[BUFSIZ];
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char *p;
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char *lp = linep;
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char *end = s + BUFSIZ - 1;
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int c, width;
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if (ip->eof)
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return (pad(ip));
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for (p = s; (c = fgetc(ip->fp)) != EOF && p < end; p++)
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if ((*p = c) == ip->eol)
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break;
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*p = '\0';
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if (c == EOF) {
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ip->eof = 1;
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if (ip->fp == stdin)
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fclose(stdin);
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return (pad(ip));
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}
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/* Something will be printed. */
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output++;
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n = strlcpy(lp, ip->sepstring, line + sizeof(line) - lp);
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lp += (n < line + sizeof(line) - lp) ? n : strlen(lp);
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width = mbswidth_truncate(s, ip->maxwidth);
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if (ip->align != '-')
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while (width++ < ip->minwidth && lp + 1 < line + sizeof(line))
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*lp++ = ip->align;
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n = strlcpy(lp, s, line + sizeof(line) - lp);
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lp += (n < line + sizeof(line) - lp) ? n : strlen(lp);
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if (ip->align == '-')
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while (width++ < ip->minwidth && lp + 1 < line + sizeof(line))
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*lp++ = ' ';
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*lp = '\0';
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return (lp);
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}
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void
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usage(void)
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{
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extern char *__progname;
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fprintf(stderr,
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"usage: %s [-F|f min.max] [-P|p min.max] [-S|s sepstring] [-T|t c] file ...\n",
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__progname);
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exit(1);
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}
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