How do we combine commands in cmd shell language such that the second command is only executed if the first command successfully completed?
something like following bash-command
make && ./a.out
a.out is only executed if make was successful
asked Sep 13, 2011 at 13:21
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Why is this tagged with both [cmd] and [bash]?– ruoholaCommented Dec 9, 2019 at 15:52
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2 Answers
The following
command1 && command2
should work on cmd as well. Quote from here:
When using cmd.exe, you can put multiple commands on the same line by using ‘&’ or ‘&&’ between commands. Using a single ampersand (&) will cause the first command and then the second command to be run in sequence. Using double ampersands (&&) introduces error checking. The second command will run only if the first command is successful.
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6Is there any way to break run multiple commands on different lines? A whole long script with error checking all the way through it looks terrible on a single line. Commented Aug 3, 2012 at 11:56
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as ABCD.ca said below. add "\" at the end of the line. This escapes the newline character. "command \" then on another line, "&& conditional_command"– xy0Commented Nov 9, 2018 at 21:47
An AND list has the form
command1 && command2
command2 is executed if, and only if, command1 returns an exit status of zero.
An OR list has the form
command1 || command2
command2 is executed if and only if command1 returns a non-zero exit status. The return status of AND and OR lists is the exit status of the last command executed in the list.
answered Sep 13, 2011 at 13:29
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7if your command1 is long then you can escape the end of the line that contains command1 with a trailing backslash:
verylongcommand1 \. Then on line 2 you can have ` && command2 `– ABCD.caCommented Oct 6, 2015 at 0:49 -