NAME | LIBRARY | SYNOPSIS | DESCRIPTION | FILES | ATTRIBUTES | VERSIONS | STANDARDS | HISTORY | SEE ALSO | COLOPHON |
|
|
updwtmp(3) Library Functions Manual updwtmp(3)
updwtmp, logwtmp - append an entry to the wtmp file
System utilities library (libutil, -lutil)
#include <utmp.h> void updwtmp(const char *wtmp_file, const struct utmp *ut); void logwtmp(const char *line, const char *name, const char *host);
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.
/var/log/wtmp database of past user logins
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() │ │ │ └────────────────────┴───────────────┴──────────────────────────┘
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.
None.
Solaris, NetBSD.
getutxent(3), wtmp(5)
This page is part of the man-pages (Linux kernel and C library
user-space interface documentation) project. Information about
the project can be found at
⟨https://www.kernel.org/doc/man-pages/⟩. If you have a bug report
for this manual page, see
⟨https://git.kernel.org/pub/scm/docs/man-pages/man-pages.git/tree/CONTRIBUTING⟩.
This page was obtained from the tarball man-pages-6.9.1.tar.gz
fetched from
⟨https://mirrors.edge.kernel.org/pub/linux/docs/man-pages/⟩ on
2024-06-26. If you discover any rendering problems in this HTML
version of the page, or you believe there is a better or more up-
to-date source for the page, or you have corrections or
improvements to the information in this COLOPHON (which is not
part of the original manual page), send a mail to
man-pages@man7.org
Linux man-pages 6.9.1 2024-05-02 updwtmp(3)
Pages that refer to this page: utmp(5)