r [old=new] [specifier]
The specifier tells which command you want to re-execute. It can have any of the following forms:
- An unsigned number (n)
r run the command with that number.
- A negative number (-n)
r runs the command that came n commands before the current one.
- A character string (x)
r runs the most recent command beginning with x.
If no specifier is given, r runs the most recent command.
The old=new feature lets you edit a command before running it. old and new must be character strings. r replaces the first occurrence of old in the command arguments with new and then re-executes the command.
runs the most recently executed command beginning with the characters cp. The cp could be the whole command name or it could be part of a longer command name (for example, cpio).
cp file1 /dir r 1=2 r 2=3
This is equivalent to
cp file1 /dir cp file2 /dir cp file3 /dir
Compare this with
cp file1 /dir/file1 r 1=2
which is equivalent to
cp file1 /dir/file1 cp file2 /dir/file1
Since r only replaces the first occurrence of the old string 1, the second 1 does not change. This shows that you have to be careful when you use the substitution feature.
r is a built-in MKS KornShell alias, defined with
alias r='fc -s'
contains the path name of the history file.
gives the maximum number of previous commands that are accessible.
Possible exit status values are:
Failure due to any of the following:
Failure due to an invalid command line option or argument.
POSIX.2. x/OPEN Portability Guide 4.0. UNIX systems with the KornShell. Windows 2000. Windows XP. Windows Server 2003. Windows Vista. Windows 7. Windows Server 2008. Windows 8. Windows Server 2012.
This is an alias built into the MKS KornShell.
MKS Toolkit for Power Users
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Using the MKS KornShell
MKS Toolkit 9.5 Documentation Build 3.