Module BatFile

module BatFile: sig .. end

File manipulation.


Utilities
val lines_of : string -> string BatEnum.t

lines_of name reads the contents of file name as an enumeration of lines. The file is automatically closed once the last line has been reached or the enumeration is garbage-collected.

val write_lines : string -> string BatEnum.t -> unit

write_lines name lines writes strings given by lines to file name with newline character appended to each line.

val size_of : string -> int

size_of name returns the size of file name in bytes.

val size_of_big : string -> Stdlib.Int64.t

size_of_big name returns the size of file name in bytes, as a 64-bit integer.

This function is provided as the size of a file larger than 1 Gb cannot be represented with an int on a 32-bit machine.

File permissions

File permissions are used when creating a file to allow controlling which users may read, write or open that file. To use a permission, create a value of type BatFile.permission and pass it as argument to BatFile.open_in, BatFile.open_out, BatFile.with_file_in or BatFile.with_file_out.

type permission 

The list of operations which are permitted on a file.

val default_permission : permission

Default permissions.

val user_read : permission

Give the current user permission to read the file. Ignored under Windows.

val user_write : permission

Give the current user permission to write the file

val user_exec : permission

Give the current user permission to execute the file. Ignored under Windows.

val group_read : permission

Give the permission to read the file to the group containing the user. Ignored under Windows.

val group_write : permission

Give the permission to write the file to the group containing the user. Ignored under Windows.

val group_exec : permission

Give the permission to execute the file to the group containing the user. Ignored under Windows.

val other_read : permission

Give the permission to read the file to the rest of the world. Ignored under Windows.

val other_write : permission

Give the permission to modify the file to the rest of the world. Ignored under Windows.

val other_exec : permission

Give the permission to execute the file to the rest of the world. Ignored under Windows.

val perm : permission list -> permission

Join permissions

val unix_perm : int -> permission

Create a permission from a Unix-style octal integer. See your favorite Unix documentation on chmod for more details.

val set_permissions : string -> permission -> unit

Set the permissions on a file.

val chmod : string -> permission -> unit

As BatFile.set_permissions

Opening a file for reading
type open_in_flag = [ `create | `excl | `mmap | `nonblock | `text ] 
val open_in : ?mode:open_in_flag list ->
?perm:permission -> string -> BatInnerIO.input

open_in file_name opens the file named file_name for reading.

Note You will need to close the file manually, with BatIO.close_in. An alternative is to call with_file_in instead of open_in.

Naming conventions for files are platform-dependent.

val with_file_in : ?mode:open_in_flag list ->
?perm:permission -> string -> (BatInnerIO.input -> 'a) -> 'a

with_file_in file_name f opens the file named file_name for reading, invokes f to process the contents of that file then, once f has returned or triggered an exception, closes the file before proceeding.

Opening a file for writing
type open_out_flag = [ `append | `create | `excl | `nonblock | `text | `trunc ] 

Flags governing file output; they correspond to the relevant flags to the POSIX open() call. The default flags are [`create; `trunc].

val open_out : ?mode:open_out_flag list ->
?perm:permission -> string -> unit BatInnerIO.output

open_out file_name opens the file named file_name for writing.

Note You will need to close the file manually, with BatIO.close_out. An alternative is to call with_file_out instead of open_out.

Naming conventions for files are platform-dependent.

val with_file_out : ?mode:open_out_flag list ->
?perm:permission -> string -> (unit BatInnerIO.output -> 'a) -> 'a

with_file_out file_name f opens the file named file_name for writing, invokes f to write onto that file then, once f has returned or triggered an exception, closes the file before proceeding.

Opening a temporary file for writing
type open_temporary_out_flag = [ `append | `create | `delete_on_exit | `excl | `nonblock | `text | `trunc ] 
val open_temporary_out : ?mode:open_temporary_out_flag list ->
?prefix:string ->
?suffix:string -> ?temp_dir:string -> unit -> unit BatInnerIO.output * string

open_temporary_out () opens a new temporary file for writing.

prefix : a string which should appear at the start of your temporary file name (by default "ocaml")
suffix : a string which should appear at the end of your temporary file name (by default "tmp")
temp_dir : indicates what temp dir to use
val with_temporary_out : ?mode:open_temporary_out_flag list ->
?prefix:string ->
?suffix:string ->
?temp_dir:string -> (unit BatInnerIO.output -> string -> 'a) -> 'a

with_temporary_out f opens a new temporary file for writing, invokes f with to write onto that file then, once f has returned or triggered an exception, closes the file before proceeding.

prefix : a string which should appear at the start of your temporary file name (by default "ocaml")
suffix : a string which should appear at the end of your temporary file name (by default "tmp")
temp_dir : indicates what temp dir to use