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UNIX for Dummies Questions & Answers
tar exit status
Post 13705 by Neo on Tuesday 22nd of January 2002 03:31:23 PM
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i downloaded a text file from metalab.unc.edu called sh.txt and in this reference manual it refers to shell scripting exit status .. at the end of one of the examples that author gave an exit status of 127..
to what does a 127 exit status refer too and what is its purpose in the code.
moxxx68 (1 Reply)
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Hi,
Consider the output of the following commands:
case1)
-------
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case2
------
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LEARN ABOUT DEBIAN
dds2index
dds2index(1) General Commands Manual dds2index(1) NAME
dds2index - tool to create an indexfile for the use of SYNOPSIS
dds2index [options] DESCRIPTION
dds2index creates an index file that is required by the file extraction utility dds2tar(1). It works on tar archives stored on dds tape devices (DAT). Since the file structure of the tape archives is used to extract the files, the archive must be an uncompressed tar ar- chive. But compression by the transparent signal processor of the tape device is allowed. The index created by dds2index is written to stdout by default and should normally be stored on hard disk as indexfile for later use by dds2tar(1). The default tape device to read from is /dev/nst0, which may be overridden with the environment variable TAPE, which in turn may be over- ridden with the -f device option. The device must be a SCSI tape device. OPTIONS
-f devicefile device of the tape archive. Must be a character special file. -t indexfile write the index to indexfile, not to stdout. -z,--compress write the index in (gzip) compressed mode. --help print some screens of online help with examples through a pager and exit immediatley. OPTIONS you didn't really need -b, --block-size Set the maximal blocksize, dds2index can handle. --z, --no-compress Don't filter the archive file through gzip. -v,--verbose verbose mode. Print to stderr what is going on. -h,--hash-mode Print a hash sign '#' to stderr for each MB read from tape. -V,--version Print the version number of dds2index to stderr and exit immediately. EXAMPLES
Example of getting the index from the default tape /dev/nst0 and storing it in file archive.idx: dds2index -v -t archive.idx WARNING
This program can only read records (tar is calling them tape blocks) up to 32 kbytes. A bigger buffer will cause problems with the Linux device driver. ENVIRONMENT
The environment variable TAPE overrides the default tape device /dev/nst0. FILES
/dev/nst0 default tape device file. Must be a character special file. SEE ALSO
dds2tar(1), mt(1), mt-dds(1), tar(1), gzip(1) HISTORY
This program was created as a tool for dds2tar(1). AUTHOR
J"org Weule (weule@cs.uni-duesseldorf.de), Phone +49 211 751409. This software is available at ftp.uni-duesseldorf.de:/pub/unix/apollo 2.4 dds2index(1)