home *** CD-ROM | disk | FTP | other *** search
- ATTR (Attribute) Charles Petzold
-
- Purpose: ATTR.COM permits display and modification of the archive, system,
- hidden, and read-only file attributes.
-
- Format: ATTR
- or
- ATTR *.*
- or
- ATTR [+A|-A] [+S|-S] [+H|-H] [+R|-R]
- [d:][path]filename[.ext]
-
- Remarks: Entering ATTR without any parameters, as in the first format shown
- above, produces a help display (essentially identical to the third
- form above) that shows which file attributes can be changed.
-
- ATTR.COM permits the use of the global ? and * characters (as in the
- second format above). Entering ATTR filename displays a specific
- file's attributes. For example,
-
- ATTR IBMBIO.COM
-
- returns the display
-
- IBMBIO.COM Arc Sys Hid R-O
-
- showing that the Archive, System, Hidden, and Read-Only bits of the
- attribute byte are set for this file.
-
- When wildcards are used to list the attributes of all the files in a
- directory, subdirectory names are shown as Dir (between the Arc and
- Sys in the example above). Unlike the DOS DIR command, ATTR lists
- hidden files, whether sought by specified filename or through a *.*
- listing. However, ATTR does not show Volume names or the dot and
- double dot entries in subdirectories.
-
- The syntax for changing file attributes is indicated in the third
- format above. After typing ATTR (and a space) you simply precede the
- file specification with a plus or minus sign, followed by the letter
- A (Archive), S (System), H (Hidden), or R (Read-Only). A plus sign
- turns on the specified attribute; a minus sign turns it off. More
- than one attribute can be changed at once, and the attribute
- designating letters may be entered in any order and in upper or
- lowercase. No space may be used between the plus or minus and the
- letter that follows it, however.
-
- Example: To convert the file 85TAX.WKS to hidden and read-only, you
- would enter
-
- ATTR +H +R 85TAX.WKS
-
- Since DOS itself normally sets the Archive bit, entering
-
- ATTR 85TAX.WKS
-
- would produce the display
-
- 85TAX.WKS Arc Hid R-O
-
- Since the Hidden attribute has been set, however, the DIR command
- will produce the message, "File not found." And since the Read-Only
- flag has also been set, a DEL command will produce the message,
- "Access denied."