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Volltextergebnisse:

string_operations

73 Treffer, Zuletzt geändert: vor 17 Jahren

${foo:-bar} If $foo exists and is not null, return $foo. If it doesn't exist or is null, return bar. export foo="" echo ${foo:-one} one echo $fo... ${foo:=bar} If $foo exists and is not null, return $foo. If it doesn't exist or is null, set $foo to bar and return bar export foo="" echo ${foo:=one} one echo $foo... ${foo:+bar} If $foo exists and is not null, return bar. If it doesn't exist, or is null, return a null. export foo="this is a test" echo ${foo:+... name:-word} If varname exists and isn't null, return its value; otherwise return word. Purpose: Returning a default value if t

test

1 Treffer, Zuletzt geändert: vor 16 Jahren

nnecessary, as the script will, in any case, #+ return the exit status of the last command executed. </c