/*-
* SPDX-License-Identifier: BSD-3-Clause
*
* Copyright (c) 1980, 1987, 1991, 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) 1980, 1987, 1991, 1993\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#if 0
#ifndef lint
static char sccsid[] = "@(#)wc.c 8.1 (Berkeley) 6/6/93";
#endif /* not lint */
#endif
#include <sys/cdefs.h>
#include <sys/capsicum.h>
#include <sys/param.h>
#include <sys/stat.h>
#include <capsicum_helpers.h>
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <locale.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <wchar.h>
#include <wctype.h>
#include <libxo/xo.h>
#include <libcasper.h>
#include <casper/cap_fileargs.h>
static const char *stdin_filename = "stdin";
static fileargs_t *fa;
static uintmax_t tlinect, twordct, tcharct, tlongline;
static bool doline, doword, dochar, domulti, dolongline;
static volatile sig_atomic_t siginfo;
static xo_handle_t *stderr_handle;
static void show_cnt(const char *file, uintmax_t linect, uintmax_t wordct,
uintmax_t charct, uintmax_t llct);
static int cnt(const char *);
static void usage(void);
static void
siginfo_handler(int sig __unused)
{
siginfo = 1;
}
static void
reset_siginfo(void)
{
signal(SIGINFO, SIG_DFL);
siginfo = 0;
}
int
main(int argc, char *argv[])
{
int ch, errors, total;
cap_rights_t rights;
(void) setlocale(LC_CTYPE, "");
argc = xo_parse_args(argc, argv);
if (argc < 0)
exit(EXIT_FAILURE);
while ((ch = getopt(argc, argv, "clmwL")) != -1)
switch((char)ch) {
case 'l':
doline = true;
break;
case 'w':
doword = true;
break;
case 'c':
dochar = true;
domulti = false;
break;
case 'L':
dolongline = true;
break;
case 'm':
domulti = true;
dochar = false;
break;
case '?':
default:
usage();
}
argv += optind;
argc -= optind;
(void)signal(SIGINFO, siginfo_handler);
fa = fileargs_init(argc, argv, O_RDONLY, 0,
cap_rights_init(&rights, CAP_READ, CAP_FSTAT), FA_OPEN);
if (fa == NULL)
xo_err(EXIT_FAILURE, "Unable to initialize casper");
caph_cache_catpages();
if (caph_limit_stdio() < 0)
xo_err(EXIT_FAILURE, "Unable to limit stdio");
if (caph_enter_casper() < 0)
xo_err(EXIT_FAILURE, "Unable to enter capability mode");
/* Wc's flags are on by default. */
if (!(doline || doword || dochar || domulti || dolongline))
doline = doword = dochar = true;
stderr_handle = xo_create_to_file(stderr, XO_STYLE_TEXT, 0);
xo_open_container("wc");
xo_open_list("file");
errors = 0;
total = 0;
if (argc == 0) {
xo_open_instance("file");
if (cnt(NULL) != 0)
++errors;
xo_close_instance("file");
} else {
while (argc--) {
xo_open_instance("file");
if (cnt(*argv++) != 0)
++errors;
xo_close_instance("file");
++total;
}
}
xo_close_list("file");
if (total > 1) {
xo_open_container("total");
show_cnt("total", tlinect, twordct, tcharct, tlongline);
xo_close_container("total");
}
fileargs_free(fa);
xo_close_container("wc");
if (xo_finish() < 0)
xo_err(EXIT_FAILURE, "stdout");
exit(errors == 0 ? EXIT_SUCCESS : EXIT_FAILURE);
}
static void
show_cnt(const char *file, uintmax_t linect, uintmax_t wordct,
uintmax_t charct, uintmax_t llct)
{
xo_handle_t *xop;
if (!siginfo)
xop = NULL;
else {
xop = stderr_handle;
siginfo = 0;
}
if (doline)
xo_emit_h(xop, " {:lines/%7ju/%ju}", linect);
if (doword)
xo_emit_h(xop, " {:words/%7ju/%ju}", wordct);
if (dochar || domulti)
xo_emit_h(xop, " {:characters/%7ju/%ju}", charct);
if (dolongline)
xo_emit_h(xop, " {:long-lines/%7ju/%ju}", llct);
if (file != stdin_filename)
xo_emit_h(xop, " {:filename/%s}\n", file);
else
xo_emit_h(xop, "\n");
}
static int
cnt(const char *file)
{
static char buf[MAXBSIZE];
struct stat sb;
mbstate_t mbs;
const char *p;
uintmax_t linect, wordct, charct, llct, tmpll;
ssize_t len;
size_t clen;
int fd;
wchar_t wch;
bool gotsp, warned;
linect = wordct = charct = llct = tmpll = 0;
if (file == NULL) {
fd = STDIN_FILENO;
file = stdin_filename;
} else if ((fd = fileargs_open(fa, file)) < 0) {
xo_warn("%s: open", file);
return (1);
}
if (doword || (domulti && MB_CUR_MAX != 1))
goto word;
/*
* If all we need is the number of characters and it's a regular file,
* just stat it.
*/
if (doline == 0 && dolongline == 0) {
if (fstat(fd, &sb)) {
xo_warn("%s: fstat", file);
(void)close(fd);
return (1);
}
if (S_ISREG(sb.st_mode)) {
reset_siginfo();
charct = sb.st_size;
show_cnt(file, linect, wordct, charct, llct);
tcharct += charct;
(void)close(fd);
return (0);
}
}
/*
* For files we can't stat, or if we need line counting, slurp the
* file. Line counting is split out because it's a lot faster to get
* lines than to get words, since the word count requires locale
* handling.
*/
while ((len = read(fd, buf, sizeof(buf))) != 0) {
if (len < 0) {
xo_warn("%s: read", file);
(void)close(fd);
return (1);
}
if (siginfo)
show_cnt(file, linect, wordct, charct, llct);
charct += len;
if (doline || dolongline) {
for (p = buf; len > 0; --len, ++p) {
if (*p == '\n') {
if (tmpll > llct)
llct = tmpll;
tmpll = 0;
++linect;
} else {
tmpll++;
}
}
}
}
reset_siginfo();
if (doline)
tlinect += linect;
if (dochar)
tcharct += charct;
if (dolongline && llct > tlongline)
tlongline = llct;
show_cnt(file, linect, wordct, charct, llct);
(void)close(fd);
return (0);
/* Do it the hard way... */
word: gotsp = true;
warned = false;
memset(&mbs, 0, sizeof(mbs));
while ((len = read(fd, buf, sizeof(buf))) != 0) {
if (len < 0) {
xo_warn("%s: read", file);
(void)close(fd);
return (1);
}
p = buf;
while (len > 0) {
if (siginfo)
show_cnt(file, linect, wordct, charct, llct);
if (!domulti || MB_CUR_MAX == 1) {
clen = 1;
wch = (unsigned char)*p;
} else if ((clen = mbrtowc(&wch, p, len, &mbs)) == 0) {
clen = 1;
} else if (clen == (size_t)-1) {
if (!warned) {
errno = EILSEQ;
xo_warn("%s", file);
warned = true;
}
memset(&mbs, 0, sizeof(mbs));
clen = 1;
wch = (unsigned char)*p;
} else if (clen == (size_t)-2) {
break;
}
charct++;
if (wch != L'\n')
tmpll++;
len -= clen;
p += clen;
if (wch == L'\n') {
if (tmpll > llct)
llct = tmpll;
tmpll = 0;
++linect;
}
if (iswspace(wch)) {
gotsp = true;
} else if (gotsp) {
gotsp = false;
++wordct;
}
}
}
reset_siginfo();
if (domulti && MB_CUR_MAX > 1) {
if (mbrtowc(NULL, NULL, 0, &mbs) == (size_t)-1 && !warned)
xo_warn("%s", file);
}
if (doline)
tlinect += linect;
if (doword)
twordct += wordct;
if (dochar || domulti)
tcharct += charct;
if (dolongline && llct > tlongline)
tlongline = llct;
show_cnt(file, linect, wordct, charct, llct);
(void)close(fd);
return (0);
}
static void
usage(void)
{
xo_error("usage: wc [-Lclmw] [file ...]\n");
exit(EXIT_FAILURE);
}