получить имя текущей системы (get the name of the current system)
Пролог (Prolog)
This manual page is part of the POSIX Programmer's Manual. The
Linux implementation of this interface may differ (consult the
corresponding Linux manual page for details of Linux behavior),
or the interface may not be implemented on Linux.
Имя (Name)
uname — get the name of the current system
Синопсис (Synopsis)
#include <sys/utsname.h>
int uname(struct utsname *name);
Описание (Description)
The uname() function shall store information identifying the
current system in the structure pointed to by name.
The uname() function uses the utsname structure defined in
<sys/utsname.h>.
The uname() function shall return a string naming the current
system in the character array sysname. Similarly, nodename shall
contain the name of this node within an implementation-defined
communications network. The arrays release and version shall
further identify the operating system. The array machine shall
contain a name that identifies the hardware that the system is
running on.
The format of each member is implementation-defined.
Возвращаемое значение (Return value)
Upon successful completion, a non-negative value shall be
returned. Otherwise, -1 shall be returned and errno set to
indicate the error.
Ошибки (Error)
No errors are defined.
The following sections are informative.
Примеры (Examples)
None.
Использование в приложениях (Application usage)
The inclusion of the nodename member in this structure does not
imply that it is sufficient information for interfacing to
communications networks.
Обоснование (Rationale)
The values of the structure members are not constrained to have
any relation to the version of this volume of POSIX.1‐2017
implemented in the operating system. An application should
instead depend on _POSIX_VERSION and related constants defined in
<unistd.h>.
This volume of POSIX.1‐2017 does not define the sizes of the
members of the structure and permits them to be of different
sizes, although most implementations define them all to be the
same size: eight bytes plus one byte for the string terminator.
That size for nodename is not enough for use with many networks.
The uname() function originated in System III, System V, and
related implementations, and it does not exist in Version 7 or
4.3 BSD. The values it returns are set at system compile time in
those historical implementations.
4.3 BSD has gethostname() and gethostid(), which return a
symbolic name and a numeric value, respectively. There are
related sethostname() and sethostid() functions that are used to
set the values the other two functions return. The former
functions are included in this specification, the latter are not.
Будущие направления (Future directions)
None.
Смотри также (See also)
The Base Definitions volume of POSIX.1‐2017, sys_utsname.h(0p)
