User  |  Syst  |  Libr  |  Device  |  Files  |  Other  |  Admin  |  Head  |

---

   sys_resource.h.0p    ( 10 )

---

---

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)

sys/resource.h — definitions for XSI resource operations

---

Синопсис (Synopsis)

#include <sys/resource.h>

---

Описание (Description)

The <sys/resource.h> header shall define the following symbolic
       constants as possible values of the which argument of
       getpriority() and setpriority():

       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 <sys/resource.h> header shall define the following type
       through typedef:

       rlim_t          Unsigned integer type used for limit values.

       The <sys/resource.h> header shall define the following symbolic
       constants, which shall have values suitable for use in #if
       preprocessing directives:

       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.

       On implementations where all resource limits are representable in
       an object of type rlim_t, RLIM_SAVED_MAX and RLIM_SAVED_CUR need
       not be distinct from RLIM_INFINITY.

       The <sys/resource.h> header shall define the following symbolic
       constants as possible values of the who parameter of getrusage():

       RUSAGE_SELF     Returns information about the current process.

       RUSAGE_CHILDREN Returns information about children of the current
                       process.

       The <sys/resource.h> header shall define the rlimit structure,
       which shall include at least the following members:

           rlim_t rlim_cur  The current (soft) limit.
           rlim_t rlim_max  The hard limit.

       The <sys/resource.h> header shall define the rusage structure,
       which shall include at least the following members:

           struct timeval ru_utime  User time used.
           struct timeval ru_stime  System time used.

       The <sys/resource.h> header shall define the timeval structure as
       described in <sys/time.h>.

       The <sys/resource.h> header shall define the following symbolic
       constants as possible values for the resource argument of
       getrlimit() and setrlimit():

       RLIMIT_CORE     Limit on size of core 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 following shall be declared as functions and may also be
       defined as macros. Function prototypes shall be provided.

           int  getpriority(int, id_t);
           int  getrlimit(int, struct rlimit *);
           int  getrusage(int, struct rusage *);
           int  setpriority(int, id_t, int);
           int  setrlimit(int, const struct rlimit *);

       The <sys/resource.h> header shall define the id_t type through
       typedef, as described in <sys/types.h>.

       Inclusion of the <sys/resource.h> header may also make visible
       all symbols from <sys/time.h>.

       The following sections are informative.

---

Использование в приложениях (Application usage)

None.

---

Обоснование (Rationale)

None.

---

Будущие направления (Future directions)

None.

---

Смотри также (See also)

sys_time.h(0p), sys_types.h(0p)

       The System Interfaces volume of POSIX.1‐2017, getpriority(3p),
       getrlimit(3p), getrusage(3p)

---