a1200   NEWS   APPS   DOCS   ABOUT
a1200
----
a1200
----
Autodocs
 Libraries:
 dos.library
  AbortPkt
  AddBuffers
  AddDosEntry
  AddPart
  AddSegment
  AllocDosObject
  AssignAdd
  AssignLate
  AssignLock
  AssignPath
  AttemptLockDosList
  ChangeMode
  CheckSignal
  Cli
  CliInitNewcli
  CliInitRun
  Close
  CompareDates
  CreateDir
  CreateNewProc
  CreateProc
  CurrentDir
  DateStamp
  DateToStr
  Delay
  DeleteFile
  DeleteVar
  DeviceProc
  DoPkt
  DupLock
  DupLockFromFH
  EndNotify
  ErrorReport
  ExAll
  ExAllEnd
  ExNext
  Examine
  ExamineFH
  Execute
  Exit
  FGetC
  FGets
  FPutC
  FPuts
  FRead
  FWrite
  Fault
  FilePart
  FindArg
  FindCliProc
  FindDosEntry
  FindSegment
  FindVar
  Flush
  Format
  FreeArgs
  FreeDeviceProc
  FreeDosEntry
  FreeDosObject
  GetArgStr
  GetConsoleTask
  GetCurrentDirName
  GetDeviceProc
  GetFileSysTask
  GetProgramDir
  GetProgramName
  GetPrompt
  GetVar
  Info
  Inhibit
  Input
  InternalLoadSeg
  InternalUnLoadSeg
  IoErr
  IsFileSystem
  IsInteractive
  LoadSeg
  Lock
  LockDosList
  LockRecord
  LockRecords
  MakeDosEntry
  MakeLink
  MatchEnd
  MatchFirst
  MatchNext
  MatchPattern
  MatchPatternNoCase
  MaxCli
  NameFromFH
  NameFromLock
  NewLoadSeg
  NextDosEntry
  Open
  OpenFromLock
  Output
  ParentDir
  ParentOfFH
  ParsePattern
  ParsePatternNoCase
  PathPart
  PrintFault
  PutStr
  Read
  ReadArgs
  ReadItem
  ReadLink
  Relabel
  RemAssignList
  RemDosEntry
  RemSegment
  Rename
  ReplyPkt
  RunCommand
  SameDevice
  SameLock
  Seek
  SelectInput
  SelectOutput
  SendPkt
  SetArgStr
  SetComment
  SetConsoleTask
  SetCurrentDirName
  SetFileDate
  SetFileSize
  SetFileSysTask
  SetIoErr
  SetMode
  SetOwner
  SetProgramDir
  SetProgramName
  SetPrompt
  SetProtection
  SetVBuf
  SetVar
  SplitName
  StartNotify
  StrToDate
  StrToLong
  SystemTagList
  UnGetC
  UnLoadSeg
  UnLock
  UnLockDosList
  UnLockRecord
  UnLockRecords
  VFPrintf
  VFWritef
  VPrintf
  WaitForChar
  WaitPkt
  Write
  WriteChars
Include
GuruMeditation
Docs » Autodocs » dos.library » ExNext

NAME

	ExNext -- Examine the next entry in a directory

SYNOPSIS

	success = ExNext( lock, FileInfoBlock )
D0 D1 D2
BOOL ExNext(BPTR, struct FileInfoBlock *)

FUNCTION

	This routine is passed a directory lock and a FileInfoBlock that
have been initialized by a previous call to Examine(), or updated
by a previous call to ExNext(). ExNext() gives a return code of zero
on failure. The most common cause of failure is reaching the end
of the list of files in the owning directory. In this case, IoErr
will return ERROR_NO_MORE_ENTRIES and a good exit is appropriate.
So, follow these steps to examine a directory:
1) Pass a Lock and a FileInfoBlock to Examine(). The lock must
be on the directory you wish to examine.
2) Pass ExNext() the same lock and FileInfoBlock.
3) Do something with the information returned in the FileInfoBlock.
Note that the fib_DirEntryType field is positive for directories,
negative for files.
4) Keep calling ExNext() until it returns FALSE. Check IoErr()
to ensure that the reason for failure was ERROR_NO_MORE_ENTRIES.
Note: if you wish to recursively scan the file tree and you find
another directory while ExNext()ing you must Lock that directory and
Examine() it using a new FileInfoBlock. Use of the same
FileInfoBlock to enter a directory would lose important state
information such that it will be impossible to continue scanning
the parent directory. While it is permissible to UnLock() and Lock()
the parent directory between ExNext() calls, this is NOT recommended.
Important state information is associated with the parent lock, so
if it is freed between ExNext() calls this information has to be
rebuilt on each new ExNext() call, and will significantly slow down
directory scanning.
It is NOT legal to Examine() a file, and then to ExNext() from that
FileInfoBlock. You may make a local copy of the FileInfoBlock, as
long as it is never passed back to the operating system.

INPUTS

	lock - BCPL pointer to a lock originally used for the Examine() call
infoBlock - pointer to a FileInfoBlock used on the previous Examine()
or ExNext() call.

RESULT

	success - boolean
SPECIAL NOTE
FileInfoBlock must be longword-aligned. AllocDosObject() will
allocate them correctly for you.

SEE ALSO

Examine(), Lock(), UnLock(), IoErr(), ExamineFH(), AllocDosObject(), ExAll()

Comments

Name:
E-mail: Use this if you want a message if you get a response, will not be shown.
Comment:
Select correct short for:

Fairlight

AOA
AFL
FC
FLT

Comments:

$VER: d0.se 1.14 Copyright © 2011-2021 Tobias Geijersson support at d0 dot se