bug: some table header(?) output goes to stderr instead of stdout
[@ sbin]# doveadm -f table -o mail_location=mdbox_deleted:/home/popusers/testtest/mdbox:INDEX=/home/popindex/testtest/index fetch -u testtest 'guid' mailbox INBOX 2> /dev/null 3c967f33b8aea671f3551db1ea8e33e9 6fa01ccc103a7009c7b940657dbcd72c ba955a6d6218950f42e5b0ee0a33a916
[@ sbin]# doveadm -f table -o mail_location=mdbox_deleted:/home/popusers/testtest/mdbox:INDEX=/home/popindex/testtest/index fetch -u testtest 'guid' mailbox INBOX guid 3c967f33b8aea671f3551db1ea8e33e9 6fa01ccc103a7009c7b940657dbcd72c ba955a6d6218950f42e5b0ee0a33a916
On 2021-03-18, Marc Marc@f1-outsourcing.eu wrote:
[@ sbin]# doveadm -f table -o mail_location=mdbox_deleted:/home/popusers/testtest/mdbox:INDEX=/home/popindex/testtest/index fetch -u testtest 'guid' mailbox INBOX 2> /dev/null 3c967f33b8aea671f3551db1ea8e33e9 6fa01ccc103a7009c7b940657dbcd72c ba955a6d6218950f42e5b0ee0a33a916
[@ sbin]# doveadm -f table -o mail_location=mdbox_deleted:/home/popusers/testtest/mdbox:INDEX=/home/popindex/testtest/index fetch -u testtest 'guid' mailbox INBOX guid 3c967f33b8aea671f3551db1ea8e33e9 6fa01ccc103a7009c7b940657dbcd72c ba955a6d6218950f42e5b0ee0a33a916
That's a useful feature, saves messing about to exclude the headers when you want to use the results to fetch messages as shown in doveadm-search(1).
On 2021-03-18, Marc Marc@f1-outsourcing.eu wrote:
[@ sbin]# doveadm -f table -o
3c967f33b8aea671f3551db1ea8e33e9 6fa01ccc103a7009c7b940657dbcd72c ba955a6d6218950f42e5b0ee0a33a916
[@ sbin]# doveadm -f table -o mail_location=mdbox_deleted:/home/popusers/testtest/mdbox:INDEX=/home/po
mail_location=mdbox_deleted:/home/popusers/testtest/mdbox:INDEX=/home/po pindex/testtest/index fetch -u testtest 'guid' mailbox INBOX 2> /dev/null pindex/testtest/index fetch -u testtest 'guid' mailbox INBOX
guid 3c967f33b8aea671f3551db1ea8e33e9 6fa01ccc103a7009c7b940657dbcd72c ba955a6d6218950f42e5b0ee0a33a916
That's a useful feature, saves messing about to exclude the headers when you want to use the results to fetch messages as shown in doveadm-search(1).
Using stderr/stdout like this is not according to standards. But I do get that, I was tryig to do that with tail -n +1, and thought wtf is it not working!!! ;) There could be a nasty side effect, if someone starts redirecting 2>/dev/null because of this table header. He will not get a real error.
On 2021-03-18, Marc Marc@f1-outsourcing.eu wrote:
[@ sbin]# doveadm -f table -o mail_location=mdbox_deleted:/home/popusers/testtest/mdbox:INDEX=/home/popindex/testtest/index fetch -u testtest 'guid' mailbox INBOX 2> /dev/null 3c967f33b8aea671f3551db1ea8e33e9 6fa01ccc103a7009c7b940657dbcd72c ba955a6d6218950f42e5b0ee0a33a916
Strange -- my version (2.3.10) dumps headers to stdout, not stderr
# doveadm -f table fetch -u $user guid mailbox INBOX 2>/dev/null | cat -n | head -3
1 guid
2 8104226179c70d7cc248c9924cabdb8c
3 0813554a7ed4cf1e113f42a4cc8bc477From a strictly design point of view, this seems more correct as the header is part of the data, not "out of band" output like errors. If headers are pumped to stderr, you can always employ shell hacks (as a followup poster did) to unify them to stdout
# doveadm -f table fetch ... 2>&1Maybe it's better to add another formatter to avoid tricky parsing or shell hacks e.g.
# doveadm -f tab-nohdr ...Joseph Tam jtam.home@gmail.com
Strange -- my version (2.3.10) dumps headers to stdout, not stderr
No not strange ;) stupid of me not to mention that I am still on el7 distribution (dovecot-2.2.36-8.el7.x86_64). But I think I will move to the vendor packages soon, now that centos8 is eol and only stream is available.
participants (3)
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Joseph Tam
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Marc
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Stuart Henderson