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142 lines
1.7 KiB
Groff
142 lines
1.7 KiB
Groff
.TH 9 1
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.SH NAME
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9, 9.rc, u, u.rc \- run Plan 9 or Unix commands
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.SH SYNOPSIS
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.B 9
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.I cmd
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[
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.I args
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\&...
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]
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.PP
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.B .
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.B 9
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(from
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.MR sh (1) )
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.PP
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.B 9.rc
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.I cmd
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[
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.I args
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\&...
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]
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.PP
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.B .
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.B 9.rc
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(from
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.MR rc (1) )
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.PP
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.B u
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.I cmd
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[
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.I args
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\&...
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]
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.PP
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.B .
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.B u
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(from
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.MR sh (1) )
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.PP
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.B u.rc
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.I cmd
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[
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.I args
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\&...
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]
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.PP
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.B .
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.B u.rc
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(from
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.MR rc (1) )
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.SH DESCRIPTION
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Because Plan 9 supplies commands with the same name as but different
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behavior than many basic Unix system commands
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(e.g.,
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.BR grep ,
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.BR sed ,
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.BR mkdir ,
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.BR rm ),
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it is not recommended to run with the Plan 9 bin directory
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ahead of the system directories.
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.PP
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.I 9
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is a shell script that sets up a Plan 9 environment and runs
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.I cmd .
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It sets
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.B $PLAN9
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if necessary
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and adds
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.B $PLAN9/bin
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to the beginning of
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.B $PATH
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before running
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.IR cmd .
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.PP
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If run with no arguments,
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.B 9
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does not do anything, so it can be invoked from
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.IR sh -style
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shells using
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.B .
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.B 9
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in order to make the current shell start running in the Plan 9 environment.
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.PP
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.I 9.rc
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is the same as
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.I 9
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but written for use by the shell
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.MR rc (1) .
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.PP
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.I U
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and
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.I u.rc
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are the inverse of
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.I 9
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and
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.IR 9.rc :
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they move
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.B $PLAN9/bin
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to the end of the path.
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.SH EXAMPLES
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Search for greek in the password file:
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.IP
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.EX
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$ 9 grep '[α-ζ]' /etc/passwd
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.EE
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.PP
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Start an
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.MR rc (1)
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with the Plan 9 commands in the path before the system commands,
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and then run the Unix
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.IR ls :
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.IP
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.EX
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$ 9 rc
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% u ls
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.EE
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.SH SOURCE
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.B \*9/bin/9
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.br
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.B \*9/bin/9.rc
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.br
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.B \*9/bin/u
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.br
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.B \*9/bin/u.rc
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.SH SEE ALSO
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.MR intro (1)
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.SH BUGS
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Some shell configurations
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(notably, oh-my-zsh)
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define
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.B 9
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as an alias for
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.B cd
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.BR \-9 ,
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which makes the
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.I 9
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command described here inaccessible.
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In such shells, it is necessary to
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.B unalias
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.B 9
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in your initialization scripts.
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