Linux cli command updwtmpx

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NAME 🖥️ updwtmpx 🖥️

append an entry to the wtmp file

LIBRARY

System utilities library (libutil, -lutil)

SYNOPSIS

#include <utmp.h>
void updwtmp(const char *wtmp_file, const struct utmp *ut);
void logwtmp(const char *line, const char *name",constchar*"host);

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).

InterfaceAttributeValue

updwtmp(), logwtmp()

Thread safetyMT-Unsafe sig:ALRM timer

VERSIONS

For consistency with the other “utmpx” functions (see getutxent(3)), glibc provides (since glibc 2.1):

#define _GNU_SOURCE /* See feature_test_macros(7) */
#include <utmpx.h>
void updwtmpx (const char *wtmpx_file, const struct utmpx *utx);

This 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)

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