Enum RLimit

Source

pub enum RLimit {
Show 20 variants    SocketBufferSize,
    CoreSize,
    DataSize,
    Nice,
    FileSize,
    SigPending,
    KQueues,
    MemLock,
    RSS,
    MaxFiles,
    MessageQueueByte,
    RealTimePriority,
    StackSize,
    CpuTime,
    MaxProcs,
    MaxMemory,
    MaxFileLocks,
    MaxPtty,
    MaxRealTime,
    MaxThreads,
}

Expand description

Abstraction over the various rlimits.

Variants§

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SocketBufferSize

-b: The maximum socket buffer size. RLIMIT_SBSIZE (freebsd, dragonfly)

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CoreSize

-c; The maximum size of core files created. RLIMIT_CORE The maximum size core file that this process can create. If the process terminates and would dump a core file larger than this, then no core file is created. So setting this limit to zero prevents core files from ever being created.

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DataSize

-d: The maximum size of a process’s data segment. RLIMIT_DATA The maximum size of data memory for the process. If the process tries to allocate data memory beyond this amount, the allocation function fails.

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Nice

-e: The maximum scheduling priority (“nice”). RLIMIT_NICE Specifies a ceiling to which the process’s nice value can be raised using setpriority(2) or nice(2). The actual ceiling for the nice value is calculated as 20 - rlim_cur. (This strangeness occurs because negative numbers cannot be specified as resource limit values, since they typically have special meanings. For example, RLIM_INFINITY typically is the same as -1.)

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FileSize

-f: The maximum size of files written by the shell and its children. RLIMIT_FSIZE The maximum size of file the process can create. Trying to write a larger file causes a signal: SIGXFSZ.

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SigPending

-i: The maximum number of pending signals.RLIMIT_SIGPENDING Specifies the limit on the number of signals that may be queued for the real user ID of the calling process. Both standard and real-time signals are counted for the purpose of checking this limit. However, the limit is only enforced for sigqueue(3); it is always possible to use kill(2) to queue one instance of any of the signals that are not already queued to the process.

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KQueues

-k: The maximum number of kqueues that may be allocated. RLIMIT_KQUEUES (freebsd)

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MemLock

-l: The maximum size that may be locked into memory. RLIMIT_MEMLOCK, The maximum size (in bytes) which a process may lock into memory using the mlock(2) system call.

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RSS

-m: The maximum resident set size (many systems do not honor this limit). RLIMIT_RSS When there is memory pressure and swap is available, prioritize eviction of a process’ resident pages beyond this amount (in bytes).

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MaxFiles

-n: The maximum number of open file descriptors (most systems do not allow this value to be set). RLIMIT_NOFILE

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MessageQueueByte

-q: The maximum number of bytes in POSIX message queues. RLIMIT_MSGQUEUE A limit on the number of bytes that can be allocated for POSIX message queues for the real user ID of the calling process.

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