Module unistd

Safe wrappers around functions found in libc “unistd.h” header

Structs

• Gid
  Group identifier
• Group
  Representation of a Group, based on libc::group
• ResGid
  Real, effective and saved group IDs.
• ResUid
  Real, effective and saved user IDs.
• Uid
  User identifier
• User
  Representation of a User, based on libc::passwd

Enums

• SysconfVar
  Variable names for sysconf

Constants

• ROOT
  Constant for UID = 0

Functions

• close
  Close a raw file descriptor
• getegid
  Get the effective group ID
• geteuid
  Get the effective user ID
• getgid
  Get the real group ID
• getgrouplist
  Calculate the supplementary group access list.
• getgroups
  Get the list of supplementary group IDs of the calling process.
• getresgid
  Gets the real, effective, and saved group IDs.
• getresuid
  Gets the real, effective, and saved user IDs.
• getuid
  Get a real user ID
• initgroups
  Initialize the supplementary group access list.
• pipe
  Create an interprocess channel.
• read
  Read from a raw file descriptor.
• setegid
  Set the effective group ID
• seteuid
  Set the effective user ID
• setgid
  Set the group ID
• setgroups
  Set the list of supplementary group IDs for the calling process.
• setresgid
  Sets the real, effective, and saved gid. (see setresuid(2))
• setresuid
  Sets the real, effective, and saved uid. (see setresuid(2))
• setuid
  Set the user ID
• sleep
  Suspend execution for an interval of time
• sysconf
  Get configurable system variables (see sysconf(3))
• write
  Write to a raw file descriptor.