NAME

getrusage — get information about resource utilisation

SYNOPSIS

#include <sys/resource.h>

int getrusage(int who, struct rusage *r_usage);

DESCRIPTION

The getrusage() function provides 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 is returned about resources used by the current process. If the value of the who argument is RUSAGE_CHILDREN, information is returned about resources used by the terminated and waited-for children of the current process. If the child is never waited for (for instance, 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.

RETURN VALUE

Upon successful completion, getrusage() returns 0. Otherwise, -1 is returned, and errno is set to indicate the error.

ERRORS

The getrusage() function will fail if:

[EINVAL]

The value of the who argument is not valid.

EXAMPLES

None.

APPLICATION USAGE

None.

FUTURE DIRECTIONS

None.

SEE ALSO

exit(3) , sigaction(3) , time(3) , times(3) , wait(3) , <sys/resource.h> .