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Test Your Knowledge in Computers #89
Difficulty: Easy
Software management applications like the Ubuntu Software Center are front-ends to the core terminal commands use to install and manage software applications.
True or False?
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logwtmp(3) [freebsd man page]

UPDWTMP(3)                                                   Linux Programmer's Manual                                                  UPDWTMP(3)

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 ATTRIBUTES
For an explanation of the terms used in this section, see attributes(7). +-----------+---------------+--------------------------+ |Interface | Attribute | Value | +-----------+---------------+--------------------------+ |updwtmp(), | Thread safety | MT-Unsafe sig:ALRM timer | |logwtmp() | | | +-----------+---------------+--------------------------+ CONFORMING TO
Not in POSIX.1. 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. SEE ALSO
getutxent(3), wtmp(5) COLOPHON
This page is part of release 4.15 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at GNU 2017-09-15 UPDWTMP(3)

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