Path: csiph.com!goblin1!goblin.stu.neva.ru!usenet.stanford.edu!not-for-mail From: dirk+bash@testssl.sh Newsgroups: gnu.bash.bug Subject: Re: bash sockets: printf \x0a does TCP fragmentation Date: Tue, 25 Sep 2018 15:04:37 +0200 Lines: 29 Approved: bug-bash@gnu.org Message-ID: References: <20180921231101307758654@bob.proulx.com> <714e1ba0-0052-2f2b-676d-778f2b7129c1@testssl.sh> <20180922111950901701520@bob.proulx.com> <948d4864-8808-9ce4-cc1e-2cce68256897@case.edu> NNTP-Posting-Host: lists.gnu.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Trace: usenet.stanford.edu 1537880694 4850 208.118.235.17 (25 Sep 2018 13:04:54 GMT) X-Complaints-To: action@cs.stanford.edu Cc: bug-bash@gnu.org To: chet.ramey@case.edu, chet.ramey@case.edu Envelope-to: bug-bash@gnu.org Openpgp: preference=signencrypt Autocrypt: addr=dirk+bash@testssl.sh; prefer-encrypt=mutual; keydata= xsFNBFSxqIwBEAClqHueTe+Ro+I4jReXss4DKwfeKhl23yuEZ7wN7GxBwGxslYxY15sJWhJ1 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Content-Language: en-US X-Df-Sender: NDM2MjM5 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 134.119.228.99 X-BeenThere: bug-bash@gnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: Bug reports for the GNU Bourne Again SHell List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Xref: csiph.com gnu.bash.bug:14659 On 9/23/18 8:26 PM, Chet Ramey wrote: > On 9/22/18 4:22 PM, Bob Proulx wrote: > >> Note that I *did* provide you with a way to do what you wanted to do. :-) >> >> It was also noted in another message that the external standalone >> printf command line utility did buffer as you desired. That seems >> another very good solution too. Simply use "command printf ..." to >> force using the external version. > > This won't work the way you want. The `command' builtin only inhibits > execution of shell functions. It still executes builtins. You want to > either get the full pathname of a printf utility using `type -ap printf' > and use that, or use the env or exec variants I recommended in my last > message. FYI: I ended up checking with type before whether an external printf exists and set a variable for this and then just call this variable. env or exec: never thought about it (thanks!) but as both are external commands, that would mean upon every call one additional external program. (yes, I know that there is such thing as a fs buffer). Subshells also costs resources. As this is a core function I am happy for every homeopathic dose of time I safe here :-) Cheers, Dirk