Module base::sys::linux

Small system utility modules for usage by other modules.

Re-exports

• pub use ioctl::*;
• pub use signal::*;
• pub use crate::sys::unix::descriptor::*;

Modules

• acpi_event 🔒
• capabilities 🔒
• descriptor 🔒
• event 🔒
• file 🔒
• file_traits 🔒
  This module exposes Linux’s off64_t, pread64, and pwrite64 identifiers as the non-64 POSIX versions, similar to defining _FILE_OFFSET_BITS=64 in a C program.
• ioctl
  Macros and wrapper functions for dealing with ioctls.
• linux 🔒
  Linux-specific utility modules.
• mmap 🔒
  The mmap module provides a safe interface to mmap memory and ensures unmap is called when the mmap object leaves scope.
• net 🔒
• netlink 🔒
• notifiers 🔒
• platform_timer_resolution
• poll 🔒
• priority 🔒
• sched 🔒
  Wrappers for CPU affinity functions.
• shm 🔒
• signal
• signalfd 🔒
• syslog
• terminal 🔒
• timer 🔒
• vsock
• write_zeroes 🔒

Structs

• AcpiNotifyEvent
• Error
  A system error In Unix systems, retrieved from errno (man 3 errno), set by a libc function that returned an error. On Windows, retrieved from GetLastError, set by a Windows function that returned an error
• EventContext
  Used to poll multiple objects that have file descriptors.
• FileDataIterator
  Iterator returning the offset range of data in the file.
• GenlMsgHdr
  Generic netlink header struct, can be used by netlink consumer
• MemfdSeals
  A set of memfd seals.
• MemoryMapping
  Wraps an anonymous shared memory mapping in the current process. Provides RAII semantics including munmap when no longer needed.
• MemoryMappingArena
  Tracks Fixed Memory Maps within an anonymous memory-mapped fixed-sized arena in the current process.
• NetlinkGenericDataIter
  Iterator over struct NlAttr as received from a netlink socket.
• NetlinkGenericRead
• NetlinkGenericSocket
  Safe wrapper for NETLINK_GENERIC netlink sockets.
• NetlinkMessage
  A single netlink message, including its header and data.
• NetlinkMessageIter
  Iterator over struct nlmsghdr as received from a netlink socket.
• NlAttr
  Netlink attribute struct, can be used by netlink consumer
• NlAttrWithData
• SignalFd
  A safe wrapper around a Linux signalfd (man 2 signalfd).
• UnlinkUnixDatagram
  Used to attempt to clean up a named pipe after it is no longer used.
• UnlinkUnixListener
  Used to attempt to clean up a named pipe after it is no longer used.
• sched_attr

Enums

• AcpiEventError
• Error
• FallocateMode
  The operation to perform with fallocate.
• FlockOperation
  The operation to perform with flock.
• SignalFdError

Constants

• BLKDISCARD
  Constant ioctl request number.
• BLOCK_IO_TYPE 🔒

Traits

• AsRawPid
  A trait used to abstract types that provide a process id that can be operated on.
• EventExt
  Linux specific extensions to Event.
• MemoryMappingBuilderUnix
• MemoryMappingUnix
• SharedMemoryLinux
• Terminal
  Trait for file descriptors that are TTYs, according to isatty(3).

Functions

• call_with_extended_max_files
  Executes the given callback with extended soft limit of max number of open files. After the callback executed, restore the limit.
• discard_block
  Discards the given range of a block file.
• drop_capabilities
  Drops all capabilities (permitted, inheritable, and effective) from the current process.
• enable_core_scheduling
  Enable experimental core scheduling for the current thread.
• errno_result
  Returns the last errno as a Result that is always an error.
• fallocate
  Safe wrapper for fallocate().
• find_next_data
  Find the offset range of the next data in the file.
• flock
  Safe wrapper for flock(2) with the operation op and optionally nonblocking. The lock will be dropped automatically when file is dropped.
• fstat
  Safe wrapper for fstat().
• get_cpu_affinity
• getegid
  Safe wrapper for getegid(2).
• geteuid
  Safe wrapper for geteuid(2).
• getpid
  This bypasses libc’s caching getpid(2) wrapper which can be invalid if a raw clone was used elsewhere.
• getppid
  Safe wrapper for the geppid Linux systemcall.
• gettid
  Safe wrapper for the gettid Linux systemcall.
• is_block_file
  Checks whether a file is a block device fie or not.
• kill_process_group
  Kill all processes in the current process group.
• logical_core_capacity
  Returns the capacity (measure of performance) of a given logical core.
• logical_core_cluster_id
  Returns the cluster ID of a given logical core.
• logical_core_frequencies_khz
  Returns a list of supported frequencies in kHz for a given logical core.
• logical_core_max_freq_khz
  Returns the maximum frequency (in kHz) of a given logical core.
• max_open_files
  Get the soft and hard limits of max number of open files allowed by the environment.
• max_timeout
  Return the maximum Duration that can be used with libc::timespec.
• move_proc_to_cgroup
• move_task_to_cgroup
• move_to_cgroup
  Moves the requested PID/TID to a particular cgroup
• new_pipe_full
  Test-only function used to create a pipe that is full. The pipe is created, has its size set to the minimum and then has that much data written to it. Use new_pipe_full to test handling of blocking write calls in unit tests.
• open_file_or_duplicate
  Open the file with the given path, or if it is of the form /proc/self/fd/N then just use the file descriptor.
• parse_sysfs_cpu_info 🔒
• parse_sysfs_cpu_info_vec 🔒
  Queries the property of a specified CPU sysfs node.
• pipe
  Spawns a pipe pair where the first pipe is the read end and the second pipe is the write end.
• poll_in
  Utility function that returns true if the given FD is readable without blocking.
• read_raw_stdin
  Read raw bytes from stdin.
• reap_child
  Reaps a child process that has terminated.
• safe_descriptor_from_cmdline_fd
  Check FD is not opened by crosvm and returns a FD that is freshly DUPFD_CLOEXEC’s. A SafeDescriptor is created from the duplicated fd. It does not take ownership of fd passed by argument.
• safe_descriptor_from_path
  If the given path is of the form /proc/self/fd/N for some N, returns Ok(Some(N)). Otherwise returns Ok(None).
• sched_setattr
• set_cpu_affinity
  Set the CPU affinity of the current thread to a given set of CPUs.
• set_max_open_files 🔒
  Set the soft and hard limits of max number of open files to the given value.
• set_pipe_size
  Sets the pipe signified with fd to size.
• set_rt_prio_limit
  Enables real time thread priorities in the current thread up to limit.
• set_rt_round_robin
  Sets the current thread to be scheduled using the round robin real time class with priority.
• set_thread_name
  Safe wrapper for PR_SET_NAME(2const)
• validate_raw_descriptor
  Verifies that |raw_descriptor| is actually owned by this process and duplicates it to ensure that we have a unique handle to it.
• validate_raw_fd
  Verifies that |raw_fd| is actually owned by this process and duplicates it to ensure that we have a unique handle to it.
• wait_for_pid
  A safe wrapper around waitpid.

Type Aliases

• Gid
• Mode
• Result
• Result
• Result
• Uid
  Re-export libc types that are part of the API.