This is the command breakposix that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator
PROGRAM:
NAME
break — exit from for, while, or until loop
SYNOPSIS
break [n]
DESCRIPTION
The break utility shall exit from the smallest enclosing for, while, or until loop, if
any; or from the nth enclosing loop if n is specified. The value of n is an unsigned
decimal integer greater than or equal to 1. The default shall be equivalent to n=1. If n
is greater than the number of enclosing loops, the outermost enclosing loop shall be
exited. Execution shall continue with the command immediately following the loop.
OPTIONS
None.
OPERANDS
See the DESCRIPTION.
STDIN
Not used.
INPUT FILES
None.
ENVIRONMENT VARIABLES
None.
ASYNCHRONOUS EVENTS
Default.
STDOUT
Not used.
STDERR
The standard error shall be used only for diagnostic messages.
OUTPUT FILES
None.
EXTENDED DESCRIPTION
None.
EXIT STATUS
0 Successful completion.
>0 The n value was not an unsigned decimal integer greater than or equal to 1.
CONSEQUENCES OF ERRORS
Default.
The following sections are informative.
APPLICATION USAGE
None.
EXAMPLES
for i in *
do
if test −d "$i"
then break
fi
done
RATIONALE
In early proposals, consideration was given to expanding the syntax of break and continue
to refer to a label associated with the appropriate loop as a preferable alternative to
the n method. However, this volume of POSIX.1‐2008 does reserve the name space of command
names ending with a <colon>. It is anticipated that a future implementation could take
advantage of this and provide something like:
outofloop: for i in a b c d e
do
for j in 0 1 2 3 4 5 6 7 8 9
do
if test −r "${i}${j}"
then break outofloop
fi
done
done
and that this might be standardized after implementation experience is achieved.
FUTURE DIRECTIONS
None.
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