Hello world/Standard error: Difference between revisions
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(→{{header|AWK}}: Add my /dev/stderr example again, with new text to explain that /dev/stderr might not work. "cat 1>&2" is better.) |
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=={{header|AWK}}== |
=={{header|AWK}}== |
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Pipe through a shell command: |
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<lang awk>BEGIN { |
<lang awk>BEGIN { |
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print "Goodbye, World!"| "cat 1>&2" |
print "Goodbye, World!"| "cat 1>&2" |
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}</lang> |
}</lang> |
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Or write to /dev/stderr: |
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{{works with|gawk}} |
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{{works with|mawk}} |
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<lang awk>BEGIN { |
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print "Goodbye, World!" > "/dev/stderr" |
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}</lang> |
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As their manuals explain, [[gawk]] and [[mawk]] associate "/dev/stderr" with standard error. Other implementations, like [[nawk]], try to open /dev/stderr as a file. [[BSD]] (and perhaps some other Unix clones) have a /dev/stderr device node that duplicates standard error, so this code would still work. We recommend "cat 1>&2", which is more portable. Some systems have no /dev/stderr device node, but all Unix clones have a Bourne-compatible shell and a cat command. |
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=={{header|Batch File}}== |
=={{header|Batch File}}== |
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