getutmp(3) — Linux manual page

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

NAME         top

       getutmp, getutmpx - copy utmp structure to utmpx, and vice versa

SYNOPSIS         top

       #define _GNU_SOURCE             /* See feature_test_macros(7) */
       #include <utmpx.h>

       void getutmp(const struct utmpx *ux, struct utmp *u);
       void getutmpx(const struct utmp *u, struct utmpx *ux);

DESCRIPTION         top

       The getutmp() function copies the fields of the utmpx structure
       pointed to by ux to the corresponding fields of the utmp
       structure pointed to by u.  The getutmpx() function performs the
       converse operation.

RETURN VALUE         top

       These functions do not return a value.

VERSIONS         top

       These functions first appeared in glibc in version 2.1.1.

ATTRIBUTES         top

       For an explanation of the terms used in this section, see
       attributes(7).

       ┌──────────────────────────────────────┬───────────────┬─────────┐
       │Interface                             │ Attribute     │ Value   │
       ├──────────────────────────────────────┼───────────────┼─────────┤
       │getutmp(), getutmpx()                 │ Thread safety │ MT-Safe │
       └──────────────────────────────────────┴───────────────┴─────────┘

CONFORMING TO         top

       These functions are nonstandard, but appear on a few other
       systems, such as Solaris and NetBSD.

NOTES         top

       These functions exist primarily for compatibility with other
       systems where the utmp and utmpx structures contain different
       fields, or the size of corresponding fields differs.  On Linux,
       the two structures contain the same fields, and the fields have
       the same sizes.

SEE ALSO         top

       utmpdump(1), getutent(3), utmp(5)

COLOPHON         top

       This page is part of release 5.13 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
       https://www.kernel.org/doc/man-pages/.

Linux                          2021-03-22                     GETUTMP(3)

Pages that refer to this page: getutent(3),  utmp(5)

Copyright and license for this manual page

HTML rendering created 2022-12-18 by Michael Kerrisk, author of The Linux Programming Interface, maintainer of the Linux man-pages project. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH.