Compute MD5 Checksums

md5sum

Description

Computes MD5 checksums of one or more files.

Usage

md5sum(files)

Arguments

files

a character vector specifying the file names in which to compute checksum. Neither NAs nor NULL are allowed.

Details

This function uses the MD5 Message-Digest Algorithm (RFC 1321) to compute MD5 checksums of files on disk.

Value

returns a character vector containing the string representations of the calculated MD5 checksums (represented as a string). The names of this vector are the given filenames.

If one of the following conditions exist for a filename, NA is returned for the filename:

If the filename does not exist.
If the file is not a regular file.
If the function encounters any failures during computation.

References

Rivest, R. The MD5 Message-Digest Algorithm.. http://tools.ietf.org/html/rfc1321 Cambridge, MA: MIT Laboratory for Computer Science.

See Also

computeMessageDigest

Examples

## Not run: 
## make sure following files existing in the working directory.
md5sum(c("file1.txt", "file2.bin", "file3.doc")
## NA will be given for "foo"
md5sum("foo")

## End(Not run)

Package tools version 6.1.1-7
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