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z/OS V1R9.0 UNIX System Services Command ... - Christian Grothoff

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Localization<br />

Exit Values<br />

Messages<br />

Portability<br />

dd uses the following localization environment variables:<br />

v LANG<br />

v LC_ALL<br />

v LC_CTYPE<br />

v LC_MESSAGES<br />

v NLSPATH<br />

See Appendix F for more information.<br />

0 Successful completion<br />

1 Failure due to any of the following:<br />

v I/O errors on read/write<br />

v Incorrect command-line option<br />

v Incorrect arguments to a conversion<br />

2 Failure resulting in a usage message such as:<br />

v An option that should contain = does not<br />

v Unknown or incorrect command-line option<br />

Possible error messages include:<br />

badly formed number number<br />

A value specified as a number (for example, a block size) does not have<br />

the form of a number as recognized by dd. For example, you may have<br />

followed the number with a letter that dd does not recognize as a block-size<br />

unit (w, b, k).<br />

P<strong>OS</strong>IX.2, X/Open Portability Guide, <strong>UNIX</strong> systems.<br />

The conv=convfile, iseek, imsg, and omsg options plus the w suffix described in<br />

the bs= option are all extensions of the P<strong>OS</strong>IX standard.<br />

Related Information<br />

cp, cpio, iconv, mv, tr<br />

df — Display the amount of free space in the file system<br />

Format<br />

Description<br />

df [–kPStv][filename] ...<br />

df shows the amount of free space left on a file system. Space can have the<br />

following values:<br />

Space Used<br />

Total amount of space allocated to existing files in the file system.<br />

dd<br />

Chapter 2. Shell command descriptions 233

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