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| /var/log/wtmp | database of past user logins |
NAME
updwtmp, logwtmp - append an entry to the wtmp file
LIBRARY
System utilities library (libutil, -lutil)
SYNOPSIS
bash
#include <utmp.h>bash
void updwtmp(const char *\nwtmp_file\n, const struct utmp *\nut\n);\n
\nvoid logwtmp(const char *\nline\n, const char *\nname\n, const char *\nhost\n);DESCRIPTION
updwtmp() appends the utmp structure ut to the wtmp file.
logwtmp() constructs a utmp structure using line, name, host, current time, and current process ID. Then it calls updwtmp() to append the structure to the wtmp file.
FILES
- /var/log/wtmp
database of past user logins
ATTRIBUTES
For an explanation of the terms used in this section, see attributes(7).
| Interface | Attribute | Value |
| updwtmp (), logwtmp () | Thread safety | MT-Unsafe sig:ALRM timer |
VERSIONS
For consistency with the other "utmpx" functions (see getutxent(3)), glibc provides (since glibc 2.1):
bash
#define _GNU_SOURCE \n/* See feature_test_macros(7) */
\n#include <utmpx.h>\n
\nvoid updwtmpx (const char *\nwtmpx_file\n, const struct utmpx *\nutx\n);\nThis function performs the same task as updwtmp(), but differs in that it takes a utmpx structure as its last argument.
STANDARDS
None.
HISTORY
Solaris, NetBSD.
SEE ALSO
getutxent(3), wtmp(5)