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https://github.com/freebsd/freebsd-src
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eba230afba
These do not use __FBSDID but instead use bare char arrays. Reviewed by: imp, emaste Differential Revision: https://reviews.freebsd.org/D41957
116 lines
3.3 KiB
C
116 lines
3.3 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (C) 1996
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* David L. Nugent. 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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*
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* THIS SOFTWARE IS PROVIDED BY DAVID L. NUGENT 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 DAVID L. NUGENT 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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#include <ctype.h>
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#include <err.h>
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#include <fcntl.h>
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#include <string.h>
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#include <stdarg.h>
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#include "pw.h"
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static FILE *logfile = NULL;
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void
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pw_log(struct userconf * cnf, int mode, int which, char const * fmt,...)
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{
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va_list argp;
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time_t now;
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const char *cp, *name;
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struct tm *t;
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int fd, i, rlen;
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char nfmt[256], sname[32];
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if (cnf->logfile == NULL || cnf->logfile[0] == '\0') {
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return;
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}
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if (logfile == NULL) {
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/* With umask==0 we need to control file access modes on create */
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fd = open(cnf->logfile, O_WRONLY | O_CREAT | O_APPEND, 0600);
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if (fd == -1) {
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return;
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}
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logfile = fdopen(fd, "a");
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if (logfile == NULL) {
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return;
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}
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}
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if ((name = getenv("LOGNAME")) == NULL &&
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(name = getenv("USER")) == NULL) {
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strcpy(sname, "unknown");
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} else {
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/*
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* Since "name" will be embedded in a printf-like format,
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* we must sanitize it:
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*
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* Limit its length so other information in the message
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* is not truncated
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*
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* Squeeze out embedded whitespace for the benefit of
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* log file parsers
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*
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* Escape embedded % characters with another %
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*/
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for (i = 0, cp = name;
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*cp != '\0' && i < (int)sizeof(sname) - 1; cp++) {
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if (*cp == '%') {
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if (i < (int)sizeof(sname) - 2) {
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sname[i++] = '%';
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sname[i++] = '%';
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} else {
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break;
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}
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} else if (!isspace(*cp)) {
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sname[i++] = *cp;
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} /* else do nothing */
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}
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if (i == 0) {
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strcpy(sname, "unknown");
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} else {
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sname[i] = '\0';
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}
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}
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now = time(NULL);
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t = localtime(&now);
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/* ISO 8601 International Standard Date format */
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strftime(nfmt, sizeof nfmt, "%Y-%m-%d %T ", t);
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rlen = sizeof(nfmt) - strlen(nfmt);
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if (rlen <= 0 || snprintf(nfmt + strlen(nfmt), rlen,
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"[%s:%s%s] %s\n", sname, Which[which], Modes[mode],
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fmt) >= rlen) {
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warnx("log format overflow, user name=%s", sname);
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} else {
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va_start(argp, fmt);
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vfprintf(logfile, nfmt, argp);
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va_end(argp);
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fflush(logfile);
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}
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}
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