3 * David L. Nugent. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY DAVID L. NUGENT AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL DAVID L. NUGENT OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 static const char rcsid[] =
40 static FILE *logfile = NULL;
43 pw_log(struct userconf * cnf, int mode, int which, char const * fmt,...)
47 const char *cp, *name;
50 char nfmt[256], sname[32];
52 if (cnf->logfile == NULL || cnf->logfile[0] == '\0') {
56 if (logfile == NULL) {
57 /* With umask==0 we need to control file access modes on create */
58 fd = open(cnf->logfile, O_WRONLY | O_CREAT | O_APPEND, 0600);
62 logfile = fdopen(fd, "a");
63 if (logfile == NULL) {
68 if ((name = getenv("LOGNAME")) == NULL &&
69 (name = getenv("USER")) == NULL) {
70 strcpy(sname, "unknown");
73 * Since "name" will be embedded in a printf-like format,
74 * we must sanitize it:
76 * Limit its length so other information in the message
79 * Squeeze out embedded whitespace for the benefit of
82 * Escape embedded % characters with another %
84 for (i = 0, cp = name;
85 *cp != '\0' && i < (int)sizeof(sname) - 1; cp++) {
87 if (i < (int)sizeof(sname) - 2) {
93 } else if (!isspace(*cp)) {
95 } /* else do nothing */
98 strcpy(sname, "unknown");
105 /* ISO 8601 International Standard Date format */
106 strftime(nfmt, sizeof nfmt, "%Y-%m-%d %T ", t);
107 rlen = sizeof(nfmt) - strlen(nfmt);
108 if (rlen <= 0 || snprintf(nfmt + strlen(nfmt), rlen,
109 "[%s:%s%s] %s\n", sname, Which[which], Modes[mode],
111 warnx("log format overflow, user name=%s", sname);
114 vfprintf(logfile, nfmt, argp);