HP-UX Reference (11i v2 03/08) - 1 User Commands A-M (vol 1)

k
ksh(1) ksh(1)
directory containing file. If any arguments arg are given, they become the positional
parameters. Otherwise the positional parameters are unchanged. The exit status is the
exit status of the last command executed. It is not necessary that the execute permission
bit be set for file.
%% alias [ -tx ][name[
=value ] ... ]
alias with no arguments prints the list of aliases in the form name
=value on standard
output. An alias is defined for each name whose value is given. A trailing space in value
causes the next word to be checked for alias substitution. The
-t option is used to set
and list tracked aliases. The value of a tracked alias is the full path name corresponding
to the given name. The value of a tracked alias becomes undefined when the value of
PATH is reset, but the alias remains tracked. Without the
-t option, for each name in
the argument list for which no value is given, the name and value of the alias is printed.
The
-x option is used to set or print exported aliases. An exported alias is defined
across sub-shell environments. Alias returns true unless a name is given for which no
alias has been defined.
bg [ job ... ] Puts the specified jobs into the background. The current job is put in the background if
job is unspecified. See Jobs for a description of the format of job.
% break [ n ] Exit from the enclosing
for, while, until,or select loop, if any. If n is specified,
break n levels.
% continue [ n ]
Resume the next iteration of the enclosing for, while, until,or select loop. If n is
specified, resume at the n-th enclosing loop.
cd [ -L-P ][arg ]
cd old new This command can take either of two forms. In the first form it changes the current
directory to arg.Ifarg is - the directory is changed to the previous directory. The
-L
option (default) preserves logical naming when treating symbolic links. cd -L ..
moves the current directory one path component closer to the root directory. The -P
option preserves the physical path when treating symbolic links. cd -P .. changes
the working directory to the parent directory of the current directory. The shell parame-
ter HOME is the default arg. The parameter PWD is set to the current directory. The
shell parameter CDPATH defines the search path for the directory containing arg. Alter-
native directory names are separated by a colon (:). If CDPATH is null or undefined, the
default value is the current directory. Note that the current directory is specified by a
null path name which can appear immediately after the equal sign or between the colon
delimiters anywhere else in the path list. If arg begins with a /, the search path is not
used. Otherwise, each directory in the path is searched for arg. See also cd(1).
The second form of
cd substitutes the string new for the string old in the current direc-
tory name, PWD and tries to change to this new directory.
The
cd command cannot be executed by rksh.
echo [ arg ... ]
See echo(1) for usage and description.
% eval [ arg ... ]
Reads the arguments as input to the shell and executes the resulting command(s).
% exec [ arg ... ]
Parameter assignments remain in effect after the command completes. If arg is given,
the command specified by the arguments is executed in place of this shell without creat-
ing a new process. Input/output arguments can appear and affect the current process. If
no arguments are given, the effect of this command is to modify file descriptors as
prescribed by the input/output redirection list. In this case, any file descriptor numbers
greater than 2 opened with this mechanism are closed when invoking another program.
% exit [ n ] Causes the shell to exit with the exit status specified by n.Ifn is omitted, the exit status
is that of the last command executed. An end-of-file also causes the shell to exit, except
when a shell has the ignoreeof option set (see set below).
%% export [ name [=value ] ... ]
The given names are marked for automatic export to the environment of subsequently
executed commands.
Section 1−−414 Hewlett-Packard Company − 12 − HP-UX 11i Version 2: August 2003