получить информацию об использовании ресурсов (get information about resource utilization)
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)
getrusage — get information about resource utilization
Синопсис (Synopsis)
#include <sys/resource.h>
int getrusage(int who, struct rusage *r_usage);
Описание (Description)
The getrusage() function shall provide measures of the resources
used by the current process or its terminated and waited-for
child processes. If the value of the who argument is RUSAGE_SELF,
information shall be returned about resources used by the current
process. If the value of the who argument is RUSAGE_CHILDREN,
information shall be returned about resources used by the
terminated and waited-for children of the current process. If the
child is never waited for (for example, if the parent has
SA_NOCLDWAIT set or sets SIGCHLD to SIG_IGN), the resource
information for the child process is discarded and not included
in the resource information provided by getrusage().
The r_usage argument is a pointer to an object of type struct
rusage in which the returned information is stored.
Возвращаемое значение (Return value)
Upon successful completion, getrusage() shall return 0;
otherwise, -1 shall be returned and errno set to indicate the
error.
Ошибки (Error)
The getrusage() function shall fail if:
EINVAL The value of the who argument is not valid.
The following sections are informative.
Примеры (Examples)
Using getrusage()
The following example returns information about the resources
used by the current process.
#include <sys/resource.h>
...
int who = RUSAGE_SELF;
struct rusage usage;
int ret;
ret = getrusage(who, &usage);
Использование в приложениях (Application usage)
None.
Обоснование (Rationale)
None.
Будущие направления (Future directions)
None.
Смотри также (See also)
exit(3p), sigaction(3p), time(3p), times(3p), wait(3p)
The Base Definitions volume of POSIX.1‐2017, sys_resource.h(0p)
