# <!-- rdoc-file=ext/etc/etc.c -->
# The Etc module provides access to information typically stored in files in the
# /etc directory on Unix systems.
#
# The information accessible consists of the information found in the
# /etc/passwd and /etc/group files, plus information about the system's
# temporary directory (/tmp) and configuration directory (/etc).
#
# The Etc module provides a more reliable way to access information about the
# logged in user than environment variables such as +$USER+.
#
# ## Example:
#
#     require 'etc'
#
#     login = Etc.getlogin
#     info = Etc.getpwnam(login)
#     username = info.gecos.split(/,/).first
#     puts "Hello #{username}, I see your login name is #{login}"
#
# Note that the methods provided by this module are not always secure. It should
# be used for informational purposes, and not for security.
#
# All operations defined in this module are class methods, so that you can
# include the Etc module into your class.
#
module Etc
  # <!--
  #   rdoc-file=ext/etc/etc.c
  #   - confstr(p1)
  # -->
  # Returns system configuration variable using confstr().
  #
  # *name* should be a constant under `Etc` which begins with `CS_`.
  #
  # The return value is a string or nil. nil means no configuration-defined value.
  #  (confstr() returns 0 but errno is not set.)
  #
  #     Etc.confstr(Etc::CS_PATH) #=> "/bin:/usr/bin"
  #
  #     # GNU/Linux
  #     Etc.confstr(Etc::CS_GNU_LIBC_VERSION) #=> "glibc 2.18"
  #     Etc.confstr(Etc::CS_GNU_LIBPTHREAD_VERSION) #=> "NPTL 2.18"
  #
  def self?.confstr: (::Integer p1) -> ::String?

  # <!--
  #   rdoc-file=ext/etc/etc.c
  #   - endgrent()
  # -->
  # Ends the process of scanning through the /etc/group file begun by ::getgrent,
  # and closes the file.
  #
  def self?.endgrent: () -> void

  # <!--
  #   rdoc-file=ext/etc/etc.c
  #   - endpwent()
  # -->
  # Ends the process of scanning through the /etc/passwd file begun with
  # ::getpwent, and closes the file.
  #
  def self?.endpwent: () -> void

  # <!--
  #   rdoc-file=ext/etc/etc.c
  #   - getgrent()
  # -->
  # Returns an entry from the /etc/group file.
  #
  # The first time it is called it opens the file and returns the first entry;
  # each successive call returns the next entry, or `nil` if the end of the file
  # has been reached.
  #
  # To close the file when processing is complete, call ::endgrent.
  #
  # Each entry is returned as a Group struct
  #
  def self?.getgrent: () -> ::Etc::Group?

  # <!--
  #   rdoc-file=ext/etc/etc.c
  #   - getgrgid(group_id)  ->       Group
  # -->
  # Returns information about the group with specified integer `group_id`, as
  # found in /etc/group.
  #
  # The information is returned as a Group struct.
  #
  # See the unix manpage for `getgrgid(3)` for more detail.
  #
  # ### Example:
  #
  #     Etc.getgrgid(100)
  #     #=> #<struct Etc::Group name="users", passwd="x", gid=100, mem=["meta", "root"]>
  #
  def self?.getgrgid: (?::Integer group_id) -> ::Etc::Group

  # <!--
  #   rdoc-file=ext/etc/etc.c
  #   - getgrnam(name)       ->  Group
  # -->
  # Returns information about the group with specified `name`, as found in
  # /etc/group.
  #
  # The information is returned as a Group struct.
  #
  # See the unix manpage for `getgrnam(3)` for more detail.
  #
  # ### Example:
  #
  #     Etc.getgrnam('users')
  #     #=> #<struct Etc::Group name="users", passwd="x", gid=100, mem=["meta", "root"]>
  #
  def self?.getgrnam: (::String name) -> ::Etc::Group

  # <!--
  #   rdoc-file=ext/etc/etc.c
  #   - getlogin     ->  String
  # -->
  # Returns the short user name of the currently logged in user. Unfortunately, it
  # is often rather easy to fool ::getlogin.
  #
  # Avoid ::getlogin for security-related purposes.
  #
  # If ::getlogin fails, try ::getpwuid.
  #
  # See the unix manpage for `getpwuid(3)` for more detail.
  #
  # e.g.
  #     Etc.getlogin -> 'guest'
  #
  def self?.getlogin: () -> ::String?

  # <!--
  #   rdoc-file=ext/etc/etc.c
  #   - getpwent()
  # -->
  # Returns an entry from the /etc/passwd file.
  #
  # The first time it is called it opens the file and returns the first entry;
  # each successive call returns the next entry, or `nil` if the end of the file
  # has been reached.
  #
  # To close the file when processing is complete, call ::endpwent.
  #
  # Each entry is returned as a Passwd struct.
  #
  def self?.getpwent: () -> ::Etc::Passwd?

  # <!--
  #   rdoc-file=ext/etc/etc.c
  #   - getpwnam(name)       ->  Passwd
  # -->
  # Returns the /etc/passwd information for the user with specified login `name`.
  #
  # The information is returned as a Passwd struct.
  #
  # See the unix manpage for `getpwnam(3)` for more detail.
  #
  # ### Example:
  #
  #     Etc.getpwnam('root')
  #     #=> #<struct Etc::Passwd name="root", passwd="x", uid=0, gid=0, gecos="root",dir="/root", shell="/bin/bash">
  #
  def self?.getpwnam: (::String name) -> ::Etc::Passwd

  # <!--
  #   rdoc-file=ext/etc/etc.c
  #   - getpwuid(uid)        ->  Passwd
  # -->
  # Returns the /etc/passwd information for the user with the given integer `uid`.
  #
  # The information is returned as a Passwd struct.
  #
  # If `uid` is omitted, the value from `Passwd[:uid]` is returned instead.
  #
  # See the unix manpage for `getpwuid(3)` for more detail.
  #
  # ### Example:
  #
  #     Etc.getpwuid(0)
  #     #=> #<struct Etc::Passwd name="root", passwd="x", uid=0, gid=0, gecos="root",dir="/root", shell="/bin/bash">
  #
  def self?.getpwuid: (?::Integer uid) -> ::Etc::Passwd

  # <!--
  #   rdoc-file=ext/etc/etc.c
  #   - group()
  # -->
  # Provides a convenient Ruby iterator which executes a block for each entry in
  # the /etc/group file.
  #
  # The code block is passed an Group struct.
  #
  # See ::getgrent above for details.
  #
  # Example:
  #
  #     require 'etc'
  #
  #     Etc.group {|g|
  #       puts g.name + ": " + g.mem.join(', ')
  #     }
  #
  def self?.group: () { (::Etc::Group group) -> void } -> void
                 | () -> ::Etc::Group?

  # <!--
  #   rdoc-file=ext/etc/etc.c
  #   - nprocessors()
  # -->
  # Returns the number of online processors.
  #
  # The result is intended as the number of processes to use all available
  # processors.
  #
  # This method is implemented using:
  # *   sched_getaffinity(): Linux
  # *   sysconf(_SC_NPROCESSORS_ONLN): GNU/Linux, NetBSD, FreeBSD, OpenBSD,
  #     DragonFly BSD, OpenIndiana, Mac OS X, AIX
  #
  #
  # Example:
  #
  #     require 'etc'
  #     p Etc.nprocessors #=> 4
  #
  # The result might be smaller number than physical cpus especially when ruby
  # process is bound to specific cpus. This is intended for getting better
  # parallel processing.
  #
  # Example: (Linux)
  #
  #     linux$ taskset 0x3 ./ruby -retc -e "p Etc.nprocessors"  #=> 2
  #
  def self?.nprocessors: () -> ::Integer

  # <!--
  #   rdoc-file=ext/etc/etc.c
  #   - Etc.passwd { |struct| block }        ->  Passwd
  #   - Etc.passwd                   ->  Passwd
  # -->
  # Provides a convenient Ruby iterator which executes a block for each entry in
  # the /etc/passwd file.
  #
  # The code block is passed an Passwd struct.
  #
  # See ::getpwent above for details.
  #
  # Example:
  #
  #     require 'etc'
  #
  #     Etc.passwd {|u|
  #       puts u.name + " = " + u.gecos
  #     }
  #
  def self?.passwd: () { (::Etc::Passwd passwd) -> void } -> void
                  | () -> ::Etc::Passwd?

  # <!--
  #   rdoc-file=ext/etc/etc.c
  #   - setgrent()
  # -->
  # Resets the process of reading the /etc/group file, so that the next call to
  # ::getgrent will return the first entry again.
  #
  def self?.setgrent: () -> void

  # <!--
  #   rdoc-file=ext/etc/etc.c
  #   - setpwent()
  # -->
  # Resets the process of reading the /etc/passwd file, so that the next call to
  # ::getpwent will return the first entry again.
  #
  def self?.setpwent: () -> void

  # <!--
  #   rdoc-file=ext/etc/etc.c
  #   - sysconf(p1)
  # -->
  # Returns system configuration variable using sysconf().
  #
  # *name* should be a constant under `Etc` which begins with `SC_`.
  #
  # The return value is an integer or nil. nil means indefinite limit.  (sysconf()
  # returns -1 but errno is not set.)
  #
  #     Etc.sysconf(Etc::SC_ARG_MAX) #=> 2097152
  #     Etc.sysconf(Etc::SC_LOGIN_NAME_MAX) #=> 256
  #
  def self?.sysconf: (::Integer p1) -> ::Integer

  # <!--
  #   rdoc-file=ext/etc/etc.c
  #   - sysconfdir()
  # -->
  # Returns system configuration directory.
  #
  # This is typically "/etc", but is modified by the prefix used when Ruby was
  # compiled. For example, if Ruby is built and installed in /usr/local, returns
  # "/usr/local/etc" on other platforms than Windows. On Windows, this always
  # returns the directory provided by the system.
  #
  def self?.sysconfdir: () -> ::String

  # <!--
  #   rdoc-file=ext/etc/etc.c
  #   - systmpdir()
  # -->
  # Returns system temporary directory; typically "/tmp".
  #
  def self?.systmpdir: () -> ::String

  # <!--
  #   rdoc-file=ext/etc/etc.c
  #   - uname()
  # -->
  # Returns the system information obtained by uname system call.
  #
  # The return value is a hash which has 5 keys at least:
  #     :sysname, :nodename, :release, :version, :machine
  #
  # Example:
  #
  #     require 'etc'
  #     require 'pp'
  #
  #     pp Etc.uname
  #     #=> {:sysname=>"Linux",
  #     #    :nodename=>"boron",
  #     #    :release=>"2.6.18-6-xen-686",
  #     #    :version=>"#1 SMP Thu Nov 5 19:54:42 UTC 2009",
  #     #    :machine=>"i686"}
  #
  def self?.uname: () -> { sysname: ::String, nodename: ::String, release: ::String, version: ::String, machine: ::String }

  private

  CS_PATH: Integer

  CS_POSIX_V6_ILP32_OFF32_CFLAGS: Integer

  CS_POSIX_V6_ILP32_OFF32_LDFLAGS: Integer

  CS_POSIX_V6_ILP32_OFF32_LIBS: Integer

  CS_POSIX_V6_ILP32_OFFBIG_CFLAGS: Integer

  CS_POSIX_V6_ILP32_OFFBIG_LDFLAGS: Integer

  CS_POSIX_V6_ILP32_OFFBIG_LIBS: Integer

  CS_POSIX_V6_LP64_OFF64_CFLAGS: Integer

  CS_POSIX_V6_LP64_OFF64_LDFLAGS: Integer

  CS_POSIX_V6_LP64_OFF64_LIBS: Integer

  CS_POSIX_V6_LPBIG_OFFBIG_CFLAGS: Integer

  CS_POSIX_V6_LPBIG_OFFBIG_LDFLAGS: Integer

  CS_POSIX_V6_LPBIG_OFFBIG_LIBS: Integer

  CS_POSIX_V6_WIDTH_RESTRICTED_ENVS: Integer

  PC_2_SYMLINKS: Integer

  PC_ALLOC_SIZE_MIN: Integer

  PC_ASYNC_IO: Integer

  PC_CHOWN_RESTRICTED: Integer

  PC_FILESIZEBITS: Integer

  PC_LINK_MAX: Integer

  PC_MAX_CANON: Integer

  PC_MAX_INPUT: Integer

  PC_NAME_MAX: Integer

  PC_NO_TRUNC: Integer

  PC_PATH_MAX: Integer

  PC_PIPE_BUF: Integer

  PC_PRIO_IO: Integer

  PC_REC_INCR_XFER_SIZE: Integer

  PC_REC_MAX_XFER_SIZE: Integer

  PC_REC_MIN_XFER_SIZE: Integer

  PC_REC_XFER_ALIGN: Integer

  PC_SYMLINK_MAX: Integer

  PC_SYNC_IO: Integer

  PC_VDISABLE: Integer

  SC_2_CHAR_TERM: Integer

  SC_2_C_BIND: Integer

  SC_2_C_DEV: Integer

  SC_2_FORT_DEV: Integer

  SC_2_FORT_RUN: Integer

  SC_2_LOCALEDEF: Integer

  SC_2_PBS: Integer

  SC_2_PBS_ACCOUNTING: Integer

  SC_2_PBS_CHECKPOINT: Integer

  SC_2_PBS_LOCATE: Integer

  SC_2_PBS_MESSAGE: Integer

  SC_2_PBS_TRACK: Integer

  SC_2_SW_DEV: Integer

  SC_2_UPE: Integer

  SC_2_VERSION: Integer

  SC_ADVISORY_INFO: Integer

  SC_AIO_LISTIO_MAX: Integer

  SC_AIO_MAX: Integer

  SC_AIO_PRIO_DELTA_MAX: Integer

  SC_ARG_MAX: Integer

  SC_ASYNCHRONOUS_IO: Integer

  SC_ATEXIT_MAX: Integer

  SC_BARRIERS: Integer

  SC_BC_BASE_MAX: Integer

  SC_BC_DIM_MAX: Integer

  SC_BC_SCALE_MAX: Integer

  SC_BC_STRING_MAX: Integer

  SC_CHILD_MAX: Integer

  SC_CLK_TCK: Integer

  SC_CLOCK_SELECTION: Integer

  SC_COLL_WEIGHTS_MAX: Integer

  SC_CPUTIME: Integer

  SC_DELAYTIMER_MAX: Integer

  SC_EXPR_NEST_MAX: Integer

  SC_FSYNC: Integer

  SC_GETGR_R_SIZE_MAX: Integer

  SC_GETPW_R_SIZE_MAX: Integer

  SC_HOST_NAME_MAX: Integer

  SC_IOV_MAX: Integer

  SC_IPV6: Integer

  SC_JOB_CONTROL: Integer

  SC_LINE_MAX: Integer

  SC_LOGIN_NAME_MAX: Integer

  SC_MAPPED_FILES: Integer

  SC_MEMLOCK: Integer

  SC_MEMLOCK_RANGE: Integer

  SC_MEMORY_PROTECTION: Integer

  SC_MESSAGE_PASSING: Integer

  SC_MONOTONIC_CLOCK: Integer

  SC_MQ_OPEN_MAX: Integer

  SC_MQ_PRIO_MAX: Integer

  SC_NGROUPS_MAX: Integer

  SC_NPROCESSORS_CONF: Integer

  SC_NPROCESSORS_ONLN: Integer

  SC_OPEN_MAX: Integer

  SC_PAGESIZE: Integer

  SC_PAGE_SIZE: Integer

  SC_PHYS_PAGES: Integer

  SC_PRIORITIZED_IO: Integer

  SC_PRIORITY_SCHEDULING: Integer

  SC_RAW_SOCKETS: Integer

  SC_READER_WRITER_LOCKS: Integer

  SC_REALTIME_SIGNALS: Integer

  SC_REGEXP: Integer

  SC_RE_DUP_MAX: Integer

  SC_RTSIG_MAX: Integer

  SC_SAVED_IDS: Integer

  SC_SEMAPHORES: Integer

  SC_SEM_NSEMS_MAX: Integer

  SC_SEM_VALUE_MAX: Integer

  SC_SHARED_MEMORY_OBJECTS: Integer

  SC_SHELL: Integer

  SC_SIGQUEUE_MAX: Integer

  SC_SPAWN: Integer

  SC_SPIN_LOCKS: Integer

  SC_SPORADIC_SERVER: Integer

  SC_SS_REPL_MAX: Integer

  SC_STREAM_MAX: Integer

  SC_SYMLOOP_MAX: Integer

  SC_SYNCHRONIZED_IO: Integer

  SC_THREADS: Integer

  SC_THREAD_ATTR_STACKADDR: Integer

  SC_THREAD_ATTR_STACKSIZE: Integer

  SC_THREAD_CPUTIME: Integer

  SC_THREAD_DESTRUCTOR_ITERATIONS: Integer

  SC_THREAD_KEYS_MAX: Integer

  SC_THREAD_PRIORITY_SCHEDULING: Integer

  SC_THREAD_PRIO_INHERIT: Integer

  SC_THREAD_PRIO_PROTECT: Integer

  SC_THREAD_PROCESS_SHARED: Integer

  SC_THREAD_SAFE_FUNCTIONS: Integer

  SC_THREAD_SPORADIC_SERVER: Integer

  SC_THREAD_STACK_MIN: Integer

  SC_THREAD_THREADS_MAX: Integer

  SC_TIMEOUTS: Integer

  SC_TIMERS: Integer

  SC_TIMER_MAX: Integer

  SC_TRACE: Integer

  SC_TRACE_EVENT_FILTER: Integer

  SC_TRACE_EVENT_NAME_MAX: Integer

  SC_TRACE_INHERIT: Integer

  SC_TRACE_LOG: Integer

  SC_TRACE_NAME_MAX: Integer

  SC_TRACE_SYS_MAX: Integer

  SC_TRACE_USER_EVENT_MAX: Integer

  SC_TTY_NAME_MAX: Integer

  SC_TYPED_MEMORY_OBJECTS: Integer

  SC_TZNAME_MAX: Integer

  SC_V6_ILP32_OFF32: Integer

  SC_V6_ILP32_OFFBIG: Integer

  SC_V6_LP64_OFF64: Integer

  SC_V6_LPBIG_OFFBIG: Integer

  SC_VERSION: Integer

  SC_XOPEN_CRYPT: Integer

  SC_XOPEN_ENH_I18N: Integer

  SC_XOPEN_REALTIME: Integer

  SC_XOPEN_REALTIME_THREADS: Integer

  SC_XOPEN_SHM: Integer

  SC_XOPEN_STREAMS: Integer

  SC_XOPEN_UNIX: Integer

  SC_XOPEN_VERSION: Integer

  VERSION: String

  class Group < Struct[untyped]
    extend Enumerable[untyped]

    def self.[]: (*untyped) -> untyped

    def self.each: () -> untyped

    def self.inspect: () -> untyped

    def self.keyword_init?: () -> untyped

    def self.members: () -> untyped

    def self.new: (*untyped) -> untyped

    public

    def gid: () -> Integer

    def gid=: (Integer new_gid) -> void

    def mem: () -> Array[String]

    def mem=: (Array[String] new_mem) -> void

    def name: () -> String

    def name=: (String new_name) -> void

    def passwd: () -> String

    def passwd=: (String new_passwd) -> void
  end

  class Passwd < Struct[untyped]
    extend Enumerable[untyped]

    def self.[]: (*untyped) -> untyped

    def self.each: () -> untyped

    def self.inspect: () -> untyped

    def self.keyword_init?: () -> untyped

    def self.members: () -> untyped

    def self.new: (*untyped) -> untyped

    public

    def change: () -> Integer

    def change=: (Integer new_change) -> void

    def dir: () -> String

    def dir=: (String new_dir) -> void

    def expire: () -> Integer

    def expire=: (Integer new_expire) -> void

    def gecos: () -> String

    def gecos=: (String new_gecos) -> void

    def gid: () -> Integer

    def gid=: (Integer new_gid) -> void

    def name: () -> String

    def name=: (String new_name) -> void

    def passwd: () -> String

    def passwd=: (String new_passwd) -> void

    def shell: () -> String

    def shell=: (String new_shell) -> void

    def uclass: () -> String

    def uclass=: (String new_uclass) -> void

    def uid: () -> Integer

    def uid=: (Integer new_uid) -> void
  end
end