AT&T UNIX™PC Unix System V Users Manual - tenox

KSH (l) KSH(l)
test [ expr ]
Evaluate conditional expression expr. See test( 1) for
usage and description. The arithmetic comparison operators
are not restricted to integers. They allow any arithmetic
expression. Four additional primitive expressions
are allowed:
-L file True if file is a symbolic link.
filel -nt file2
True if file1 is newer than file2.
filel -ot file2
True if file1 is older than file2.
file1 -ef file2
True if filel has the same device and i-node
number as file2.
times Print the accumulated user and system times for the shell
and for processes run from the shell.
trap [ arg ] [ sig ] •••
Arg is a command to be read and executed when the shell
receives signal(s) sig . (Note that arg is scanned once
when the trap is set and once when the trap is taken.)
Each sig can be given as a number or as the name of the
signal. Trap commands are executed in order of signal
number. Any attempt to set a trap on a signal that was
ignored on entry to the current shell is ineffective. An
attempt to trap on signal 11 (memory fault) produces an
error. If arg is omitted then all trap(s) sig are reset to
their original values. If arg is the null string then this signal
is ignored by the shell and by the commands it
invokes. If sig is ERR then arg will be executed whenever
a command has a non-zero exit code. This trap is not
inherited by functions. If sig is 0 or EXIT and the trap
statement is executed inside the body of a function, then
the command arg is executed after the function completes.
If sig is 0 or EXIT for a trap set outside any function
then the command arg is executed on exit from the shell.
The trap command with no arguments prints a list of
commands associated with each signal number.
typeset [ -FLRZefilprtux[n ] [ name[ =value ] ] ••• ]
Parameter assignments remain in effect after the command
completes. When invoked inside a function, a new
instance of the parameter name is created. The parameter
value and type are restored when the function completes.
The following list of attributes may be specified:
-F This flag provides UNIX to host-name file mapping
on non-UNIX machines.
-L Left justify and remove leading blanks from
value . If n is non-zero it defines the width of the
field, otherwise it is determined by the width of
the value of first assignment. When the
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