mirror of
https://git.savannah.gnu.org/git/parallel.git
synced 2024-12-22 20:57:53 +00:00
Wrote missing man for xargs compatability.
Fixed bug in --arg-file. Implemented --show-limits.
This commit is contained in:
Ole Tange
parent
3e50ba19cf
commit
495d8bc0bd
282
src/parallel
282
src/parallel
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@ -57,6 +57,35 @@ Use NUL as delimiter. Normally input lines will end in \n
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for processing filenames that may contain \n (newline).
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=item B<--arg-file>=I<file>
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=item B<-a> I<file>
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Read items from file instead of standard input. If you use this
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option, stdin is given to the first process run. Otherwise, stdin is
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redirected from /dev/null.
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=item B<--cleanup> (not implemented)
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Remove transfered files. B<--cleanup> will remove the transfered files
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on the remote server after processing is done.
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find log -name '*gz' | parallel \
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--sshlogin server.example.com --transfer --return {.}.bz2 \
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--cleanup "zcat {} | bzip -9 >{.}.bz2"
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With B<--transfer> the file transfered to the remote server will be
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removed on the remote server. Directories created will not be removed
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- even if they are empty.
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With B<--return> the file transfered from the remote server will be
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removed on the remote server. Directories created will not be removed
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- even if they are empty.
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B<--cleanup> is ignored when not used with B<--transfer> or B<--return>.
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=item B<--command>
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=item B<-c>
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@ -81,6 +110,24 @@ as \n, or an octal or hexadecimal escape code. Octal and
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hexadecimal escape codes are understood as for the printf command.
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Multibyte characters are not supported.
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=item B<-E> I<eof-str>
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Set the end of file string to eof-str. If the end of file string
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occurs as a line of input, the rest of the input is ignored. If
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neither B<-E> nor B<-e> is used, no end of file string is used.
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=item B<--eof>[=I<eof-str>]
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=item B<-e>[I<eof-str>]
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This option is a synonym for the B<-E> option. Use B<-E> instead,
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because it is POSIX compliant for B<xargs> while this option is not.
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If I<eof-str> is omitted, there is no end of file string. If neither
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B<-E> nor B<-e> is used, no end of file string is used.
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=item B<--file>
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@ -99,17 +146,25 @@ Group output. Output from each jobs is grouped together and is only
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printed when the command is finished. STDERR first followed by STDOUT.
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B<-g> is the default. Can be reversed with B<-u>.
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=item B<--help>
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=item B<-h>
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Print a summary of the options to B<parallel> and exit.
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=item B<-I> I<string>
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Use the replacement string I<string> instead of {}.
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=item B<-U> I<string>
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=item B<--replace>[=I<replace-str>]
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=item B<--extensionreplace> I<string>
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=item B<-i>[I<replace-str>]
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Use the replacement string I<string> instead of {.} for input line without extension.
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This option is a synonym for B<-I>I<replace-str> if I<replace-str> is
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specified, and for B<-I>{} otherwise. This option is deprecated;
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use B<-I> instead.
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=item B<--jobs> I<N>
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@ -170,6 +225,16 @@ If the evaluated number is less than 1 then 1 will be used. See also
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Keep sequence of output same as the order of input. If jobs 1 2 3 4
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end in the sequence 3 1 4 2 the output will still be 1 2 3 4.
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=item B<--max-args>=I<max-args>
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=item B<-n> I<max-args>
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Use at most I<max-args> arguments per command line. Fewer than
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I<max-args> arguments will be used if the size (see the B<-s> option)
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is exceeded, unless the B<-x> option is given, in which case
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B<parallel> will exit.
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Only used with B<-m> and B<-X>.
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=item B<--number-of-cpus>
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@ -193,6 +258,75 @@ QUOTING. Most people will never need this. Quoting is disabled by
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default.
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=item B<--interactive>
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=item B<-p>
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Prompt the user about whether to run each command line and read a line
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from the terminal. Only run the command line if the response starts
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with 'y' or 'Y'. Implies B<-t>.
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=item B<--no-run-if-empty>
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=item B<-r>
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If the standard input does not contain any nonblanks, do not run the
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command.
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=item B<--return> I<filename> (not implemented)
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Transfer files from remote servers. B<--return> is used with
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B<--sshlogin> when the arguments are files on the remote servers. When
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processing is done the file I<filename> will be transfered
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from the remote server using B<rsync> and will be put relative to
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the default login dir. E.g.
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echo foo/bar.txt | parallel \
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--sshlogin server.example.com --return {}.out touch {}.out
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This will transfer the file I<$HOME/foo/bar.txt.out> from the server
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I<server.example.com> to the file I<foo/bar.txt.out> after running
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B<touch foo/bar.txt.out> on I<server.example.com>.
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echo /tmp/foo/bar.txt | parallel \
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--sshlogin server.example.com --return {}.out touch {}.out
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This will transfer the file I</tmp/foo/bar.txt.out> from the server
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I<server.example.com> to the file I</tmp/foo/bar.txt.out> after running
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B<touch /tmp/foo/bar.txt.out> on I<server.example.com>.
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Multiple files can be transfered by repeating the options multiple
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times:
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echo /tmp/foo/bar.txt | \
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parallel --sshlogin server.example.com \
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--return {}.out --return {}.out2 touch {}.out {}.out2
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B<--return> is often used with B<--transfer> and B<--cleanup>.
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B<--return> is ignored when used with B<--sshlogin :> or when not used with B<--sshlogin>.
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=item B<--max-chars>=I<max-chars>
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=item B<-s> I<max-chars>
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Use at most max-chars characters per command line, including the
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command and initial-arguments and the terminating nulls at the ends of
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the argument strings. The largest allowed value is system-dependent,
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and is calculated as the argument length limit for exec, less the size
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of your environment. The default value is the maximum.
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=item B<--show-limits>
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Display the limits on the command-line length which are imposed by the
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operating system and the -s option. Pipe the input from /dev/null
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(and perhaps specify --no-run-if-empty) if you don't want B<parallel>
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to do anything.
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=item B<-S> I<[ncpu/]sshlogin[,[ncpu/]sshlogin]> (not implemented)
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=item B<--sshlogin> I<[ncpu/]sshlogin[,[ncpu/]sshlogin]> (not implemented)
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@ -240,6 +374,16 @@ Silent. The job to be run will not be printed. This is the default.
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Can be reversed with B<-v>.
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=item B<--verbose>
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=item B<-t>
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Print the command line on the standard error output before executing
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it.
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See also B<-v>.
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=item B<--transfer> (not implemented)
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Transfer files to remote servers. B<--transfer> is used with
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@ -273,60 +417,6 @@ Transfer, Return, Cleanup. Short hand for:
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--transfer --return I<filename> --cleanup
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=item B<--return> I<filename> (not implemented)
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Transfer files from remote servers. B<--return> is used with
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B<--sshlogin> when the arguments are files on the remote servers. When
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processing is done the file I<filename> will be transfered
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from the remote server using B<rsync> and will be put relative to
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the default login dir. E.g.
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echo foo/bar.txt | parallel \
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--sshlogin server.example.com --return {}.out touch {}.out
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This will transfer the file I<$HOME/foo/bar.txt.out> from the server
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I<server.example.com> to the file I<foo/bar.txt.out> after running
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B<touch foo/bar.txt.out> on I<server.example.com>.
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echo /tmp/foo/bar.txt | parallel \
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--sshlogin server.example.com --return {}.out touch {}.out
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This will transfer the file I</tmp/foo/bar.txt.out> from the server
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I<server.example.com> to the file I</tmp/foo/bar.txt.out> after running
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B<touch /tmp/foo/bar.txt.out> on I<server.example.com>.
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Multiple files can be transfered by repeating the options multiple
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times:
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echo /tmp/foo/bar.txt | \
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parallel --sshlogin server.example.com \
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--return {}.out --return {}.out2 touch {}.out {}.out2
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B<--return> is often used with B<--transfer> and B<--cleanup>.
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B<--return> is ignored when used with B<--sshlogin :> or when not used with B<--sshlogin>.
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=item B<--cleanup> (not implemented)
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Remove transfered files. B<--cleanup> will remove the transfered files
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on the remote server after processing is done.
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find log -name '*gz' | parallel \
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--sshlogin server.example.com --transfer --return {.}.bz2 \
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--cleanup "zcat {} | bzip -9 >{.}.bz2"
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With B<--transfer> the file transfered to the remote server will be
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removed on the remote server. Directories created will not be removed
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- even if they are empty.
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With B<--return> the file transfered from the remote server will be
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removed on the remote server. Directories created will not be removed
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- even if they are empty.
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B<--cleanup> is ignored when not used with B<--transfer> or B<--return>.
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=item B<--ungroup>
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=item B<-u>
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@ -335,6 +425,13 @@ Ungroup output. Output is printed as soon as possible. This may cause
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output from different commands to be mixed. Can be reversed with B<-g>.
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=item B<-U> I<string>
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=item B<--extensionreplace> I<string>
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Use the replacement string I<string> instead of {.} for input line without extension.
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=item B<--use-cpus-instead-of-cores> (not implemented)
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Count the number of CPUs instead of cores. When computing how many
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@ -348,7 +445,14 @@ Normal users will not need this option.
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=item B<-v>
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Verbose. Print the job to be run on STDOUT. Can be reversed with
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B<--silent>.
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B<--silent>. See also B<-t>.
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=item B<--version>
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=item B<-V>
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Print the version B<parallel> and exit.
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=item B<--xargs>
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@ -800,6 +904,10 @@ Copyright (C) 2008,2009,2010 Ole Tange, http://ole.tange.dk
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Copyright (C) 2010 Ole Tange, http://ole.tange.dk and Free Software
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Foundation, Inc.
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Parts of the manual concerning B<xargs> compatability is inspired by
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the manual of B<xargs> from GNU findutils 4.4.2.
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=head1 LICENSE
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@ -949,7 +1057,6 @@ GetOptions("debug|D" => \$::opt_D,
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# xargs-compatibility - implemented, man, unittest
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"max-procs|P=s" => \$::opt_P,
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"delimiter|d=s" => \$::opt_d,
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# xargs-compatibility - implemented, unittest - man missing
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"max-chars|s=i" => \$::opt_s,
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"arg-file|a=s" => \$::opt_a,
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"no-run-if-empty|r" => \$::opt_r,
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@ -957,19 +1064,21 @@ GetOptions("debug|D" => \$::opt_D,
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"E=s" => \$::opt_E,
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"eof|e:s" => \$::opt_E,
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"max-args|n=i" => \$::opt_n,
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"verbose|t" => \$::opt_verbose,
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"help|h" => \$::opt_help,
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"verbose|t" => \$::opt_verbose,
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"version|V" => \$::opt_version,
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## xargs-compatibility - implemented - unittest missing - man missing
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"show-limits" => \$::opt_show_limits,
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## xargs-compatibility - implemented, man - unittest missing
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"interactive|p" => \$::opt_p,
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## How to unittest? tty skal emuleres
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# xargs-compatibility - implemented, unittest - man missing
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#none
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# xargs-compatability - unimplemented
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"L=i" => \$::opt_L,
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"max-lines|l:i" => \$::opt_l,
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## (echo a b;echo c) | xargs -l1 echo
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## (echo a b' ';echo c) | xargs -l1 echo
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"show-limits" => \$::opt_show_limits,
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"exit|x" => \$::opt_x,
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) || die_usage();
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@ -1017,6 +1126,7 @@ if(defined $::opt_help) { die_usage(); }
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if(defined $::opt_number_of_cpus) { print no_of_cpus(),"\n"; exit(0); }
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if(defined $::opt_number_of_cores) { print no_of_cores(),"\n"; exit(0); }
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if(defined $::opt_version) { version(); exit(0); }
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if(defined $::opt_show_limits) { show_limits(); }
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if(defined $::opt_a) {
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if(not open(ARGFILE,"<".$::opt_a)) {
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@ -1208,12 +1318,7 @@ sub max_length_of_command_line {
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# Find the max_length of a command line
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# First find an upper bound
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if(not $Global::command_line_max_len) {
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my $len = 10;
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do {
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$len *= 10;
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} while (is_acceptable_command_line_length($len));
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# Then search for the actual max length between 0 and upper bound
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$Global::command_line_max_len = binary_find_max_length(int(($len)/10),$len);
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$Global::command_line_max_len = real_max_length();
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if($::opt_s) {
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if($::opt_s <= $Global::command_line_max_len) {
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$Global::command_line_max_len = $::opt_s;
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@ -1226,6 +1331,16 @@ sub max_length_of_command_line {
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return $Global::command_line_max_len;
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}
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sub real_max_length {
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my $len = 10;
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do {
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$len *= 10;
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} while (is_acceptable_command_line_length($len));
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# Then search for the actual max length between 0 and upper bound
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return binary_find_max_length(int(($len)/10),$len);
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}
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sub binary_find_max_length {
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# Given a lower and upper bound find the max_length of a command line
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my ($lower, $upper) = (@_);
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@ -1465,6 +1580,7 @@ sub init_run_jobs {
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# Remember the original STDOUT and STDERR
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open $Global::original_stdout, ">&STDOUT" or die "Can't dup STDOUT: $!";
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open $Global::original_stderr, ">&STDERR" or die "Can't dup STDERR: $!";
|
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open $Global::original_stdin, "<&STDIN" or die "Can't dup STDIN: $!";
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$Global::running_jobs=0;
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$SIG{USR1} = \&ListRunningJobs;
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$Global::original_sigterm = $SIG{TERM};
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|
@ -1610,13 +1726,22 @@ sub start_job {
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$Global::running_jobs++;
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debug("$Global::running_jobs processes. Starting: $command\n");
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#print STDERR "LEN".length($command)."\n";
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$pid = open3(gensym, ">&STDOUT", ">&STDERR", $command) ||
|
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die("open3 failed. Report a bug to <par\@tange.dk>\n");
|
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debug("started: $command\n");
|
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open STDOUT, ">&", $Global::original_stdout or die "Can't dup \$oldout: $!";
|
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open STDERR, ">&", $Global::original_stderr or die "Can't dup \$oldout: $!";
|
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|
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$Global::job_start_sequence++;
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|
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if($::opt_a and $Global::job_start_sequence == 1) {
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# Give STDIN to the first job if using -a
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$pid = open3("<&STDIN", ">&STDOUT", ">&STDERR", $command) ||
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die("open3 failed. Report a bug to <par\@tange.dk>\n");
|
||||
# Re-open to avoid complaining
|
||||
open STDIN, "<&", $Global::original_stdin or die "Can't dup \$Global::original_stdin: $!";
|
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} else {
|
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$pid = open3(gensym, ">&STDOUT", ">&STDERR", $command) ||
|
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die("open3 failed. Report a bug to <par\@tange.dk>\n");
|
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}
|
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debug("started: $command\n");
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open STDOUT, ">&", $Global::original_stdout or die "Can't dup \$Global::original_stdout: $!";
|
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open STDERR, ">&", $Global::original_stderr or die "Can't dup \$Global::original_stderr: $!";
|
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|
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if($Global::grouped) {
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return ("seq" => $Global::job_start_sequence,
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"pid" => $pid,
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|
|
@ -1767,6 +1892,15 @@ sub version {
|
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);
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}
|
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|
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sub show_limits {
|
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print("Maximal size of command: ",real_max_length(),"\n",
|
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"Maximal used size of command: ",max_length_of_command_line(),"\n",
|
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"\n",
|
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"Execution of will continue now, and it will try to read its input\n",
|
||||
"and run commands; if this is not what you wanted to happen, please\n",
|
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"press CTRL-D or CTRL-C\n");
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}
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||||
|
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|
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#
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# Debugging
|
||||
|
|
|
|||
|
|
@ -18,6 +18,12 @@
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|||
8
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||||
9
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||||
10
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3
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1
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2
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1
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3
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2
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replace
|
||||
replace
|
||||
replace
|
||||
|
|
@ -101,3 +107,21 @@ echo far
|
|||
echo bar
|
||||
echo car
|
||||
echo far
|
||||
Maximal size of command: 131071
|
||||
Maximal used size of command: 131071
|
||||
|
||||
Execution of will continue now, and it will try to read its input
|
||||
and run commands; if this is not what you wanted to happen, please
|
||||
press CTRL-D or CTRL-C
|
||||
bar
|
||||
car
|
||||
far
|
||||
Maximal size of command: 131071
|
||||
Maximal used size of command: 100
|
||||
|
||||
Execution of will continue now, and it will try to read its input
|
||||
and run commands; if this is not what you wanted to happen, please
|
||||
press CTRL-D or CTRL-C
|
||||
bar
|
||||
car
|
||||
far
|
||||
|
|
|
|||
|
|
@ -9,6 +9,17 @@ seq 1 10 >/tmp/$$
|
|||
$PAR -a /tmp/$$ echo
|
||||
$PAR --arg-file /tmp/$$ echo
|
||||
|
||||
cd input-files/test15
|
||||
|
||||
# echo 3 | xargs -P 2 -n 1 -a files cat -
|
||||
echo 3 | parallel -k -P 2 -n 1 -a files cat -
|
||||
# echo 3 | xargs -I {} -P 2 -n 1 -a files cat {} -
|
||||
# Should give:
|
||||
# 3
|
||||
# 1
|
||||
# 2
|
||||
echo 3 | parallel -k -I {} -P 2 -n 1 -a files cat {} -
|
||||
|
||||
# Test -i and --replace: Replace with argument
|
||||
(echo a; echo END; echo b) | $PAR -k -i -eEND echo repl{}ce
|
||||
(echo a; echo END; echo b) | $PAR -k --replace -eEND echo repl{}ce
|
||||
|
|
@ -70,3 +81,7 @@ $PAR --version | wc -l
|
|||
# Test --verbose and -t
|
||||
(echo b; echo c; echo f) | $PAR -k -t echo {}ar 2>&1 >/dev/null
|
||||
(echo b; echo c; echo f) | $PAR -k --verbose echo {}ar 2>&1 >/dev/null
|
||||
|
||||
# Test --show-limits
|
||||
(echo b; echo c; echo f) | $PAR -k --show-limits echo {}ar
|
||||
(echo b; echo c; echo f) | $PAR -k --show-limits -s 100 echo {}ar
|
||||
|
|
|
|||
|
|
@ -18,6 +18,12 @@
|
|||
8
|
||||
9
|
||||
10
|
||||
3
|
||||
1
|
||||
2
|
||||
1
|
||||
3
|
||||
2
|
||||
replace
|
||||
replace
|
||||
replace
|
||||
|
|
@ -101,3 +107,21 @@ echo far
|
|||
echo bar
|
||||
echo car
|
||||
echo far
|
||||
Maximal size of command: 131071
|
||||
Maximal used size of command: 131071
|
||||
|
||||
Execution of will continue now, and it will try to read its input
|
||||
and run commands; if this is not what you wanted to happen, please
|
||||
press CTRL-D or CTRL-C
|
||||
bar
|
||||
car
|
||||
far
|
||||
Maximal size of command: 131071
|
||||
Maximal used size of command: 100
|
||||
|
||||
Execution of will continue now, and it will try to read its input
|
||||
and run commands; if this is not what you wanted to happen, please
|
||||
press CTRL-D or CTRL-C
|
||||
bar
|
||||
car
|
||||
far
|
||||
|
|
|
|||
Loading…
Reference in a new issue