Why set a socket to blocking after setting SO

Why set a socket to blocking after setting SO_LINGER values?

up vote
1
down vote

favorite

I'm looking at some proprietary legacy code that is setting a non blocking socket to blocking after doing the following.

    lbuf.l_onoff = 1;

    lbuf.l_linger = 0;

    e = setsockopt(s->s_fd, SOL_SOCKET,

            SO_LINGER, (optvalp)&lbuf, sizeof(lbuf));

Any thoughts why this might be needed either now or in the past ?

Code has supported Windows, Unixware, and Solaris in the past. Currently running on CentOs linux.

edited Nov 9 at 19:17

asked Nov 8 at 22:58

Chaim Geretz

508318

2

What functions are being called to flush the socket?
– Jeremy Friesner
Nov 8 at 23:13

I'm also at a loss as to what you mean by "flushing the socket". The concept of "flushing a socket" isn't generally implemented. See en.wikipedia.org/wiki/Berkeley_sockets
– Andrew Henle
Nov 9 at 15:19

@JeremyFriesner . I edited the question to show the actual code.
– Chaim Geretz
Nov 9 at 19:19

add a comment |

up vote
1
down vote

favorite

I'm looking at some proprietary legacy code that is setting a non blocking socket to blocking after doing the following.

    lbuf.l_onoff = 1;

    lbuf.l_linger = 0;

    e = setsockopt(s->s_fd, SOL_SOCKET,

            SO_LINGER, (optvalp)&lbuf, sizeof(lbuf));

Any thoughts why this might be needed either now or in the past ?

Code has supported Windows, Unixware, and Solaris in the past. Currently running on CentOs linux.

edited Nov 9 at 19:17

asked Nov 8 at 22:58

Chaim Geretz

508318

2

What functions are being called to flush the socket?
– Jeremy Friesner
Nov 8 at 23:13

I'm also at a loss as to what you mean by "flushing the socket". The concept of "flushing a socket" isn't generally implemented. See en.wikipedia.org/wiki/Berkeley_sockets
– Andrew Henle
Nov 9 at 15:19

@JeremyFriesner . I edited the question to show the actual code.
– Chaim Geretz
Nov 9 at 19:19

add a comment |

up vote
1
down vote

favorite

I'm looking at some proprietary legacy code that is setting a non blocking socket to blocking after doing the following.

    lbuf.l_onoff = 1;

    lbuf.l_linger = 0;

    e = setsockopt(s->s_fd, SOL_SOCKET,

            SO_LINGER, (optvalp)&lbuf, sizeof(lbuf));

Any thoughts why this might be needed either now or in the past ?

Code has supported Windows, Unixware, and Solaris in the past. Currently running on CentOs linux.

edited Nov 9 at 19:17

asked Nov 8 at 22:58

Chaim Geretz

508318

I'm looking at some proprietary legacy code that is setting a non blocking socket to blocking after doing the following.

    lbuf.l_onoff = 1;

    lbuf.l_linger = 0;

    e = setsockopt(s->s_fd, SOL_SOCKET,

            SO_LINGER, (optvalp)&lbuf, sizeof(lbuf));

Any thoughts why this might be needed either now or in the past ?

Code has supported Windows, Unixware, and Solaris in the past. Currently running on CentOs linux.

linux sockets unix solaris

edited Nov 9 at 19:17

asked Nov 8 at 22:58

Chaim Geretz

508318

edited Nov 9 at 19:17

asked Nov 8 at 22:58

Chaim Geretz

508318

edited Nov 9 at 19:17

asked Nov 8 at 22:58

Chaim Geretz

508318

asked Nov 8 at 22:58

Chaim Geretz

508318

asked Nov 8 at 22:58

Chaim Geretz

508318

2

What functions are being called to flush the socket?
– Jeremy Friesner
Nov 8 at 23:13

I'm also at a loss as to what you mean by "flushing the socket". The concept of "flushing a socket" isn't generally implemented. See en.wikipedia.org/wiki/Berkeley_sockets
– Andrew Henle
Nov 9 at 15:19

@JeremyFriesner . I edited the question to show the actual code.
– Chaim Geretz
Nov 9 at 19:19

add a comment |

2

What functions are being called to flush the socket?
– Jeremy Friesner
Nov 8 at 23:13

I'm also at a loss as to what you mean by "flushing the socket". The concept of "flushing a socket" isn't generally implemented. See en.wikipedia.org/wiki/Berkeley_sockets
– Andrew Henle
Nov 9 at 15:19

@JeremyFriesner . I edited the question to show the actual code.
– Chaim Geretz
Nov 9 at 19:19

What functions are being called to flush the socket?
– Jeremy Friesner
Nov 8 at 23:13

I'm also at a loss as to what you mean by "flushing the socket". The concept of "flushing a socket" isn't generally implemented. See en.wikipedia.org/wiki/Berkeley_sockets
– Andrew Henle
Nov 9 at 15:19

@JeremyFriesner . I edited the question to show the actual code.
– Chaim Geretz
Nov 9 at 19:19

add a comment |

active

oldest

votes

Your Answer

StackExchange.ifUsing("editor", function () {
StackExchange.using("externalEditor", function () {
StackExchange.using("snippets", function () {
StackExchange.snippets.init();
});
});
}, "code-snippets");

StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "1"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);

StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});

function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
convertImagesToLinks: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});

}
});

draft saved

draft discarded

Sign up or log in

StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});

Post as a guest

Name

Required, but never shown

StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53217432%2fwhy-set-a-socket-to-blocking-after-setting-so-linger-values%23new-answer', 'question_page');
}
);

Post as a guest

Name

Required, but never shown

active

oldest

votes

draft saved

draft discarded

Thanks for contributing an answer to Stack Overflow!

Please be sure to answer the question. Provide details and share your research!

But avoid …

Asking for help, clarification, or responding to other answers.

Making statements based on opinion; back them up with references or personal experience.

To learn more, see our tips on writing great answers.

Some of your past answers have not been well-received, and you're in danger of being blocked from answering.

Please pay close attention to the following guidance:

Please be sure to answer the question. Provide details and share your research!

But avoid …

Asking for help, clarification, or responding to other answers.

Making statements based on opinion; back them up with references or personal experience.

To learn more, see our tips on writing great answers.

draft saved

draft discarded

Sign up or log in

StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});

Post as a guest

Name

Required, but never shown

Post as a guest

Name

Required, but never shown

Sign up or log in

StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});

Post as a guest

Name

Required, but never shown

Sign up or log in

StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});

Post as a guest

Name

Required, but never shown

Sign up or log in

StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});

Post as a guest

Name

Required, but never shown

Name

Required, but never shown

Name

Required, but never shown

This page is only for reference, If you need detailed information, please check here

搜尋此網誌

Wsrtjtyk