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Text File | 1993-10-26 | 5.3 KB | 119 lines | [TEXT/$Tcl] |
-
- file option name ?arg arg ...?
-
-
- DESCRIPTION
- This command provides several operations on a file's name or
- attributes. 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
- Returns a decimal string giving the time at which file
- name was last accessed. The time is measured in the
- standard POSIX 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
- Returns all of the characters in name up to but not
- including the last slash character. If there are no
- slashes in name then returns ``.''. If the last slash
- in name is its first character, then return ``/''.
-
- file executable name
- Returns 1 if file name is executable by the current
- user, 0 otherwise.
-
- file exists name
- Returns 1 if file name exists and the current user has
- search privileges for the directories leading to it, 0
- otherwise.
-
- file extension name
- Returns all of the characters in name after and includ-
- ing the last dot in name. If there is no dot in name
- then returns the empty string.
-
- file isdirectory name
- Returns 1 if file name is a directory, 0 otherwise.
-
- file isfile name
- Returns 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
- Returns a decimal string giving the time at which file
- name was last modified. The time is measured in the
- standard POSIX 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
- Returns 1 if file name is owned by the current user, 0
- otherwise.
-
- file readable name
- Returns 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
- Returns 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 returns name.
-
- file size name
- Returns 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
- Invokes the stat kernel call on name, and uses 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
- Returns all of the characters in name after the last
- slash. If name contains no slashes then returns 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
- Returns 1 if file name is writable by the current user,
- 0 otherwise.
-
-
- KEYWORDS
- attributes, directory, file, name, stat
-