UPDWTMP

Section: Linux Programmer's Manual (3)
Updated: 2014-08-19
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NAME

updwtmp, logwtmp - append an entry to the wtmp file

SYNOPSIS

#include <utmp.h>

void updwtmp(const char *wtmp_file, const struct utmp *ut);


void logwtmp(const char *line, const char *name, const char *host);

For logwtmp(), link with -lutil.

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

CONFORMING TO

Not in POSIX.1-2001. Present on Solaris, NetBSD, and perhaps other systems.

NOTES

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


#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.

This document was created by man2html, using the manual pages.
Time: 02:54:55 GMT, September 18, 2014