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#include <sys/resource.h>
The <sys/resource.h> header defines the symbolic constants listed below as possible values of the which argument of getpriority() and setpriority(). See getpriority(3C).
PRIO_PROCESS
identifies the who argument as a process ID
PRIO_PGRP
identifies the who argument as a process group ID
PRIO_USER
identifies the who argument as a user ID
The following type is defined through typedef:
rlim_t
unsigned integer type used for limit values
The following symbolic constants are defined:
RLIM_INFINITY
a value of rlim_t indicating no limit
RLIM_SAVED_MAX
a value of type rlim_t indicating an unrepresentable saved hard limit
RLIM_SAVED_CUR
a value of type rlim_t indicating an unrepresentable saved soft limit
The symbolic constants listed below are defined as possible values of the who parameter of getrusage(). See getrusage(3C).
RUSAGE_SELF
returns information about the current process
RUSAGE_CHILDREN
returns information about children of the current process
The <sys/resource.h> header defines the rlimit structure, which includes the following members:
rlim_t rlim_cur /* the current (soft) limit */ rlim_t rlim_max /* the hard limit */
The <sys/resource.h> header defines the rusage structure, which includes the following members:
struct timeval ru_utime /* user time used */ struct timeval ru_stime /* system time used */
The timeval structure is defined as described in <sys/time.h>.
The symbolic constants listed below are defined as possible values for the resource argument of getrlimit() and setrlimit(). See getrlimit(2).
RLIMIT_CORE
limit on size of core dump file
RLIMIT_CPU
limit on CPU time per process
RLIMIT_DATA
limit on data segment size
RLIMIT_FSIZE
limit on file size
RLIMIT_NOFILE
limit on number of open files
RLIMIT_STACK
limit on stack size
RLIMIT_AS
limit on address space size
The id_t type is defined through typedef as described in <sys/types.h>. See types.h(3HEAD).
Inclusion of the <sys/resource.h> header can also make visible all symbols from <sys/time.h>. See time.h(3HEAD).
See attributes(5) for descriptions of the following attributes:
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
| Interface Stability | Standard |
getrlimit(2), getpriority(3C), time.h(3HEAD), types.h(3HEAD), attributes(5), standards(5)