PROLOG<\/a> This manual page is part of the POSIX Programmer\u2019s Manual. The Linux implementation of this interface may differ (consult the corresponding Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux.<\/p>\n exit \u2014 cause the shell to exit<\/p>\n exit [<\/b>n<\/i>]<\/b><\/p>\n The exit<\/i> utility shall cause the shell to exit from its current execution environment with the exit status specified by the unsigned decimal integer n<\/i>. If the current execution environment is a subshell environment, the shell shall exit from the subshell environment with the specified exit status and continue in the environment from which that subshell environment was invoked; otherwise, the shell utility shall terminate with the specified exit status. If n<\/i> is specified, but its value is not between 0 and 255 inclusively, the exit status is undefined.<\/p>\n A trap<\/i> on EXIT<\/b> shall be executed before the shell terminates, except when the exit<\/i> utility is invoked in that trap<\/i> itself, in which case the shell shall exit immediately.<\/p>\n None.<\/p>\n See the DESCRIPTION.<\/p>\n Not used.<\/p>\n None.<\/p>\n None.<\/p>\n Default.<\/p>\n Not used.<\/p>\n The standard error shall be used only for diagnostic messages.<\/p>\n None.<\/p>\n None.<\/p>\n The exit status shall be n<\/i>, if specified, except that the behavior is unspecified if n<\/i> is not an unsigned decimal integer or is greater than 255. Otherwise, the value shall be the exit value of the last command executed, or zero if no command was executed. When exit<\/i> is executed in a trap<\/i> action, the last command is considered to be the command that executed immediately preceding the trap<\/i> action.<\/p>\n Default.<\/p>\n The following sections are informative.<\/i><\/p>\n None.<\/p>\n Exit with a true<\/i> value:<\/p>\n exit 0<\/p>\n Exit with a false<\/i> value:<\/p>\n exit 1<\/p>\n Propagate error handling from within a subshell:<\/p>\n ( As explained in other sections, certain exit status values have been reserved for special uses and should be used by applications only for those purposes:<\/p>\n 126<\/p>\n<\/td>\n A file to be executed was found, but it was not an executable utility.<\/p>\n<\/td>\n<\/tr>\n 127<\/p>\n<\/td>\n A utility to be executed was not found.<\/p>\n<\/td>\n<\/tr>\n >128<\/p>\n<\/td>\n A command was interrupted by a signal.<\/p>\n<\/td>\n<\/tr>\n<\/table>\n The behavior of exit<\/i> when given an invalid argument or unknown option is unspecified, because of differing practices in the various historical implementations. A value larger than 255 might be truncated by the shell, and be unavailable even to a parent process that uses waitid<\/i>() to get the full exit value. It is recommended that implementations that detect any usage error should cause a non-zero exit status (or, if the shell is interactive and the error does not cause the shell to abort, store a non-zero value in “$?”<\/b>), but even this was not done historically in all shells.<\/p>\n None.<\/p>\n
NAME<\/a>
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STDOUT<\/a>
STDERR<\/a>
OUTPUT FILES<\/a>
EXTENDED DESCRIPTION<\/a>
EXIT STATUS<\/a>
CONSEQUENCES OF ERRORS<\/a>
APPLICATION USAGE<\/a>
EXAMPLES<\/a>
RATIONALE<\/a>
FUTURE DIRECTIONS<\/a>
SEE ALSO<\/a>
COPYRIGHT<\/a> <\/p>\n
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command1 || exit 1
command2 || exit 1
exec command3
) > outputfile || exit 1
echo “outputfile created successfully”<\/p>\nRATIONALE <\/a> <\/h2>\n
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SEE ALSO <\/a> <\/h2>\n