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- file option name ?arg arg ...?
- Operate on a file or a file name. Name is the name of
- a file; if it starts with a tilde, then tilde
- substitution is done before executing the command (see
- the manual entry for Tcl_TildeSubst for details).
- Option indicates what to do with the file name. Any
- unique abbreviation for option is acceptable. The
- valid options are:
-
- file atime name
- Return a decimal string giving the time at which
- file name was last accessed. The time is measured
- in the standard UNIX fashion as seconds from a
- fixed starting time (often January 1, 1970). If
- the file doesn't exist or its access time cannot
- be queried then an error is generated.
-
- file dirname name
- Return all of the characters in name up to but not
- including the last slash character. If there are
- no slashes in name then return ``.''. If the last
- slash in name is its first character, then return
- ``/''.
-
- file executable name
- Return 1 if file name is executable by the current
- user, 0 otherwise.
-
- file exists name
- Return 1 if file name exists and the current user
- has search privileges for the directories leading
- to it, 0 otherwise.
-
- file extension name
- Return all of the characters in name after and
- including the last dot in name. If there is no
- dot in name then return the empty string.
-
- file isdirectory name
- Return 1 if file name is a directory, 0 otherwise.
-
- file isfile name
- Return 1 if file name is a regular file, 0
- otherwise.
-
- file lstat name varName
- Same as stat option (see below) except uses the
- lstat kernel call instead of stat. This means
- that if name refers to a symbolic link the
- information returned in varName is for the link
- rather than the file it refers to. On systems
- that don't support symbolic links this option
- behaves exactly the same as the stat option.
-
- file mtime name
- Return a decimal string giving the time at which
- file name was last modified. The time is measured
- in the standard UNIX fashion as seconds from a
- fixed starting time (often January 1, 1970). If
- the file doesn't exist or its modified time cannot
- be queried then an error is generated.
-
- file owned name
- Return 1 if file name is owned by the current
- user, 0 otherwise.
-
- file readable name
- Return 1 if file name is readable by the current
- user, 0 otherwise.
-
- file readlink name
- Returns the value of the symbolic link given by
- name (i.e. the name of the file it points to). If
- name isn't a symbolic link or its value cannot be
- read, then an error is returned. On systems that
- don't support symbolic links this option is
- undefined.
-
- file rootname name
- Return all of the characters in name up to but not
- including the last ``.'' character in the name.
- If name doesn't contain a dot, then return name.
-
- file size name
- Return a decimal string giving the size of file
- name in bytes. If the file doesn't exist or its
- size cannot be queried then an error is generated.
-
- file stat name varName
- Invoke the stat kernel call on name, and use the
- variable given by varName to hold information
- returned from the kernel call. VarName is treated
- as an array variable, and the following elements
- of that variable are set: atime, ctime, dev, gid,
- ino, mode, mtime, nlink, size, type, uid. Each
- element except type is a decimal string with the
- value of the corresponding field from the stat
- return structure; see the manual entry for stat
- for details on the meanings of the values. The
- type element gives the type of the file in the
- same form returned by the command file type. This
- command returns an empty string.
-
- file tail name
- Return all of the characters in name after the
- last slash. If name contains no slashes then
- return name.
-
- file type name
- Returns a string giving the type of file name,
- which will be one of file, directory,
- characterSpecial, blockSpecial, fifo, link, or
- socket.
-
- file writable name
- Return 1 if file name is writable by the current
- user, 0 otherwise.
-
- The file commands that return 0/1 results are often
- used in conditional or looping commands, for example:
-
- if {![file exists foo]} then {error {bad file name}}
-
-
-