1Stdlib.Filename(3)               OCaml library              Stdlib.Filename(3)
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NAME

6       Stdlib.Filename - no description
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Module

9       Module   Stdlib.Filename
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Documentation

12       Module Filename
13        : (module Stdlib__filename)
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22       val current_dir_name : string
23
24       The conventional name for the current directory (e.g.  .  in Unix).
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28       val parent_dir_name : string
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30       The conventional name for the parent of the current directory (e.g.  ..
31       in Unix).
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35       val dir_sep : string
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37       The directory separator (e.g.  / in Unix).
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40       Since 3.11.2
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44       val concat : string -> string -> string
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47       concat dir file returns a file name that designates file file in direc‐
48       tory dir .
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52       val is_relative : string -> bool
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54       Return  true  if  the  file  name is relative to the current directory,
55       false if it is absolute (i.e. in Unix, starts with / ).
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59       val is_implicit : string -> bool
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61       Return true if the file name is relative and does  not  start  with  an
62       explicit reference to the current directory ( ./ or ../ in Unix), false
63       if it starts with an explicit reference to the root  directory  or  the
64       current directory.
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68       val check_suffix : string -> string -> bool
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71       check_suffix  name suff returns true if the filename name ends with the
72       suffix suff .
73
74       Under Windows ports (including Cygwin), comparison is case-insensitive,
75       relying  on  String.lowercase_ascii  .   Note  that this does not match
76       exactly the interpretation  of  case-insensitive  filename  equivalence
77       from Windows.
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81       val chop_suffix : string -> string -> string
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84       chop_suffix  name suff removes the suffix suff from the filename name .
85       The behavior is undefined if name does not end with the suffix  suff  .
86       chop_suffix_opt is thus recommended instead.
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90       val chop_suffix_opt : suffix:string -> string -> string option
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93       chop_suffix_opt  ~suffix  filename removes the suffix from the filename
94       if possible, or returns None if the filename does not end with the suf‐
95       fix.
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97       Under Windows ports (including Cygwin), comparison is case-insensitive,
98       relying on String.lowercase_ascii .  Note  that  this  does  not  match
99       exactly  the  interpretation  of  case-insensitive filename equivalence
100       from Windows.
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103       Since 4.08
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107       val extension : string -> string
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110       extension name is the shortest suffix ext of name0 where:
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113       - name0 is the longest suffix of name that does not contain a directory
114       separator;
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116       - ext starts with a period;
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118       - ext is preceded by at least one non-period character in name0 .
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120       If such a suffix does not exist, extension name is the empty string.
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123       Since 4.04
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127       val remove_extension : string -> string
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129       Return  the  given file name without its extension, as defined in File‐
130       name.extension . If the extension is empty, the  function  returns  the
131       given file name.
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133       The following invariant holds for any file name s :
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136       remove_extension s ^ extension s = s
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140       Since 4.04
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144       val chop_extension : string -> string
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146       Same  as  Filename.remove_extension , but raise Invalid_argument if the
147       given name has an empty extension.
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151       val basename : string -> string
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153       Split a file name into directory name / base file name.  If name  is  a
154       valid  file  name, then concat (dirname name) (basename name) returns a
155       file name which is equivalent to name .  Moreover,  after  setting  the
156       current  directory  to  dirname  name  (with Sys.chdir ), references to
157       basename name (which is a relative file name) designate the  same  file
158       as name before the call to Sys.chdir .
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160       This  function  conforms  to  the specification of POSIX.1-2008 for the
161       basename utility.
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165       val dirname : string -> string
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167       See Filename.basename .  This function conforms to the specification of
168       POSIX.1-2008 for the dirname utility.
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172       val null : string
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175       null is "/dev/null" on POSIX and "NUL" on Windows. It represents a file
176       on the OS that discards all writes and returns end of file on reads.
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179       Since 4.10.0
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183       val temp_file : ?temp_dir:string -> string -> string -> string
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186       temp_file prefix suffix returns the name of a fresh temporary  file  in
187       the temporary directory.  The base name of the temporary file is formed
188       by concatenating prefix , then a suitably chosen integer  number,  then
189       suffix .  The optional argument temp_dir indicates the temporary direc‐
190       tory  to   use,   defaulting   to   the   current   result   of   File‐
191       name.get_temp_dir_name  .   The  temporary  file is created empty, with
192       permissions 0o600 (readable and writable only by the file owner).   The
193       file  is  guaranteed  to  be different from any other file that existed
194       when temp_file was called.
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197       Before3.11.2 no ?temp_dir optional argument
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201       Raises Sys_error if the file could not be created.
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205       val  open_temp_file   :   ?mode:open_flag   list   ->   ?perms:int   ->
206       ?temp_dir:string -> string -> string -> string * out_channel
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208       Same  as Filename.temp_file , but returns both the name of a fresh tem‐
209       porary file, and an output channel opened (atomically)  on  this  file.
210       This function is more secure than temp_file : there is no risk that the
211       temporary file will be modified (e.g.  replaced  by  a  symbolic  link)
212       before  the  program opens it.  The optional argument mode is a list of
213       additional flags to control the opening of the file.   It  can  contain
214       one  or  several  of  Open_append  , Open_binary , and Open_text .  The
215       default is [Open_text] (open in text mode). The file  is  created  with
216       permissions  perms  (defaults to readable and writable only by the file
217       owner, 0o600 ).
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220       Before4.03.0 no ?perms optional argument
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224       Before3.11.2 no ?temp_dir optional argument
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228       Raises Sys_error if the file could not be opened.
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232       val get_temp_dir_name : unit -> string
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234       The name of the temporary directory:  Under  Unix,  the  value  of  the
235       TMPDIR  environment  variable,  or  "/tmp"  if the variable is not set.
236       Under Windows, the value of the TEMP environment variable, or  "."   if
237       the  variable  is not set.  The temporary directory can be changed with
238       Filename.set_temp_dir_name .
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241       Since 4.00.0
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245       val set_temp_dir_name : string -> unit
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247       Change the temporary directory returned  by  Filename.get_temp_dir_name
248       and used by Filename.temp_file and Filename.open_temp_file .
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251       Since 4.00.0
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255       val temp_dir_name : string
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257       Deprecated.  You should use Filename.get_temp_dir_name instead.
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260       The  name  of the initial temporary directory: Under Unix, the value of
261       the TMPDIR environment variable, or "/tmp" if the variable is not  set.
262       Under  Windows,  the value of the TEMP environment variable, or "."  if
263       the variable is not set.
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266       Since 3.09.1
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270       val quote : string -> string
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272       Return a quoted version of a file name, suitable for use as  one  argu‐
273       ment  in  a command line, escaping all meta-characters.  Warning: under
274       Windows, the output is only suitable for use with programs that  follow
275       the standard Windows quoting conventions.
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279       val  quote_command  :  string  ->  ?stdin:string  ->  ?stdout:string ->
280       ?stderr:string -> string list -> string
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283       quote_command cmd args returns a quoted command line, suitable for  use
284       as an argument to Sys.command , Unix.system , and the Unix.open_process
285       functions.
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287       The string cmd is the command to call.  The list args is  the  list  of
288       arguments to pass to this command.  It can be empty.
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290       The  optional  arguments  ?stdin and ?stdout and ?stderr are file names
291       used to redirect the standard input, the standard output, or the  stan‐
292       dard  error of the command.  If ~stdin:f is given, a redirection < f is
293       performed and the standard input of the command reads from file f .  If
294       ~stdout:f  is  given,  a  redirection > f is performed and the standard
295       output of the command is written to file f .  If ~stderr:f is given,  a
296       redirection  2> f is performed and the standard error of the command is
297       written to file f .  If both ~stdout:f and ~stderr:f  are  given,  with
298       the  exact  same  file name f , a 2>&1 redirection is performed so that
299       the standard output and the standard error of the  command  are  inter‐
300       leaved and redirected to the same file f .
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302       Under Unix and Cygwin, the command, the arguments, and the redirections
303       if any are quoted using  Filename.quote  ,  then  concatenated.   Under
304       Win32, additional quoting is performed as required by the cmd.exe shell
305       that is called by Sys.command .
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308       Raises Failure if the command cannot be escaped on  the  current  plat‐
309       form.
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315OCamldoc                          2020-09-01                Stdlib.Filename(3)