8a16b7a18f
Mainly focus on files that use BSD 3-Clause license. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. Special thanks to Wind River for providing access to "The Duke of Highlander" tool: an older (2014) run over FreeBSD tree was useful as a starting point.
250 lines
6.3 KiB
C
250 lines
6.3 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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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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#ifndef lint
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static const char copyright[] =
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"@(#) Copyright (c) 1993\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif /* not lint */
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)lam.c 8.1 (Berkeley) 6/6/93";
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#endif
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#endif /* not lint */
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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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/capsicum.h>
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#include <capsicum_helpers.h>
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#include <ctype.h>
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#include <err.h>
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#define MAXOFILES 20
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#define BIGBUFSIZ 5 * BUFSIZ
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static struct openfile { /* open file structure */
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FILE *fp; /* file pointer */
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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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const char *sepstring; /* string to print before each line */
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const char *format; /* printf(3) style string spec. */
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} input[MAXOFILES];
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static int morefiles; /* set by getargs(), changed by gatherline() */
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static int nofinalnl; /* normally append \n to each output line */
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static char line[BIGBUFSIZ];
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static char *linep;
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static char *gatherline(struct openfile *);
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static void getargs(char *[]);
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static char *pad(struct openfile *);
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static void usage(void);
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int
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main(int argc, char *argv[])
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{
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struct openfile *ip;
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if (argc == 1)
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usage();
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if (caph_limit_stdio() == -1)
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err(1, "unable to limit stdio");
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getargs(argv);
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if (!morefiles)
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usage();
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/*
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* Cache NLS data, for strerror, for err(3), before entering capability
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* mode.
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*/
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caph_cache_catpages();
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if (cap_enter() < 0 && errno != ENOSYS)
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err(1, "unable to enter capability mode");
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for (;;) {
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linep = line;
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for (ip = input; ip->fp != NULL; ip++)
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linep = gatherline(ip);
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if (!morefiles)
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exit(0);
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fputs(line, stdout);
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fputs(ip->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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static void
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getargs(char *av[])
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{
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struct openfile *ip = input;
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char *p, *c;
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static char fmtbuf[BUFSIZ];
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char *fmtp = fmtbuf;
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int P, S, F, T;
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cap_rights_t rights_ro;
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cap_rights_init(&rights_ro, CAP_READ, CAP_FSTAT);
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P = S = F = T = 0; /* capitalized options */
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while ((p = *++av) != NULL) {
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if (*p != '-' || !p[1]) {
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if (++morefiles >= MAXOFILES)
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errx(1, "too many input files");
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if (*p == '-')
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ip->fp = stdin;
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else if ((ip->fp = fopen(p, "r")) == NULL) {
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err(1, "%s", p);
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}
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if (cap_rights_limit(fileno(ip->fp), &rights_ro) < 0
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&& errno != ENOSYS)
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err(1, "unable to limit rights on: %s", p);
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ip->pad = P;
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if (!ip->sepstring)
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ip->sepstring = (S ? (ip-1)->sepstring : "");
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if (!ip->format)
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ip->format = ((P || F) ? (ip-1)->format : "%s");
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if (!ip->eol)
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ip->eol = (T ? (ip-1)->eol : '\n');
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ip++;
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continue;
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}
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c = ++p;
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switch (tolower((unsigned char)*c)) {
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case 's':
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if (*++p || (p = *++av))
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ip->sepstring = p;
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else
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usage();
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S = (*c == 'S' ? 1 : 0);
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break;
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case 't':
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if (*++p || (p = *++av))
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ip->eol = *p;
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else
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usage();
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T = (*c == 'T' ? 1 : 0);
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nofinalnl = 1;
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break;
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case 'p':
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ip->pad = 1;
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P = (*c == 'P' ? 1 : 0);
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/* FALLTHROUGH */
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case 'f':
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F = (*c == 'F' ? 1 : 0);
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if (*++p || (p = *++av)) {
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fmtp += strlen(fmtp) + 1;
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if (fmtp >= fmtbuf + sizeof(fmtbuf))
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errx(1, "no more format space");
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/* restrict format string to only valid width formatters */
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if (strspn(p, "-.0123456789") != strlen(p))
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errx(1, "invalid format string `%s'", p);
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if (snprintf(fmtp, fmtbuf + sizeof(fmtbuf) - fmtp, "%%%ss", p)
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>= fmtbuf + sizeof(fmtbuf) - fmtp)
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errx(1, "no more format space");
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ip->format = fmtp;
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}
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else
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usage();
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break;
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default:
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usage();
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}
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}
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ip->fp = NULL;
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if (!ip->sepstring)
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ip->sepstring = "";
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}
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static char *
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pad(struct openfile *ip)
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{
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char *lp = linep;
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strlcpy(lp, ip->sepstring, line + sizeof(line) - lp);
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lp += strlen(lp);
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if (ip->pad) {
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snprintf(lp, line + sizeof(line) - lp, ip->format, "");
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lp += strlen(lp);
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}
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return (lp);
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}
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static char *
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gatherline(struct openfile *ip)
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{
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char s[BUFSIZ];
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int c;
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char *p;
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char *lp = linep;
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char *end = s + sizeof(s) - 1;
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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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morefiles--;
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return (pad(ip));
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}
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strlcpy(lp, ip->sepstring, line + sizeof(line) - lp);
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lp += strlen(lp);
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snprintf(lp, line + sizeof(line) - lp, ip->format, s);
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lp += strlen(lp);
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return (lp);
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}
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static void
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usage(void)
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{
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fprintf(stderr, "%s\n%s\n",
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"usage: lam [ -f min.max ] [ -s sepstring ] [ -t c ] file ...",
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" lam [ -p min.max ] [ -s sepstring ] [ -t c ] file ...");
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exit(1);
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}
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