📄 tty_io.c
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<a name=L363 href="source/kernel/chr_drv/tty_io.c?v=0.97#L363">363</a> <a href="ident?v=0.97;i=wake_up">wake_up</a>(&tty->read_q->proc_list);<a name=L364 href="source/kernel/chr_drv/tty_io.c?v=0.97#L364">364</a> if (b-<a href="ident?v=0.97;i=buf">buf</a> >= minimum || !<a href="ident?v=0.97;i=current">current</a>->timeout)<a name=L365 href="source/kernel/chr_drv/tty_io.c?v=0.97#L365">365</a> break;<a name=L366 href="source/kernel/chr_drv/tty_io.c?v=0.97#L366">366</a> if (<a href="ident?v=0.97;i=current">current</a>->signal & ~current->blocked) <a name=L367 href="source/kernel/chr_drv/tty_io.c?v=0.97#L367">367</a> break;<a name=L368 href="source/kernel/chr_drv/tty_io.c?v=0.97#L368">368</a> if (tty->link && !tty->link-><a href="ident?v=0.97;i=count">count</a>)<a name=L369 href="source/kernel/chr_drv/tty_io.c?v=0.97#L369">369</a> break;<a name=L370 href="source/kernel/chr_drv/tty_io.c?v=0.97#L370">370</a> <a href="ident?v=0.97;i=TTY_READ_FLUSH">TTY_READ_FLUSH</a>(tty);<a name=L371 href="source/kernel/chr_drv/tty_io.c?v=0.97#L371">371</a> if (tty->link)<a name=L372 href="source/kernel/chr_drv/tty_io.c?v=0.97#L372">372</a> <a href="ident?v=0.97;i=TTY_WRITE_FLUSH">TTY_WRITE_FLUSH</a>(tty->link);<a name=L373 href="source/kernel/chr_drv/tty_io.c?v=0.97#L373">373</a> <a href="ident?v=0.97;i=cli">cli</a>();<a name=L374 href="source/kernel/chr_drv/tty_io.c?v=0.97#L374">374</a> if (<a href="ident?v=0.97;i=EMPTY">EMPTY</a>(tty->secondary))<a name=L375 href="source/kernel/chr_drv/tty_io.c?v=0.97#L375">375</a> <a href="ident?v=0.97;i=interruptible_sleep_on">interruptible_sleep_on</a>(&tty->secondary->proc_list);<a name=L376 href="source/kernel/chr_drv/tty_io.c?v=0.97#L376">376</a> <a href="ident?v=0.97;i=sti">sti</a>();<a name=L377 href="source/kernel/chr_drv/tty_io.c?v=0.97#L377">377</a> }<a name=L378 href="source/kernel/chr_drv/tty_io.c?v=0.97#L378">378</a> <a href="ident?v=0.97;i=TTY_READ_FLUSH">TTY_READ_FLUSH</a>(tty);<a name=L379 href="source/kernel/chr_drv/tty_io.c?v=0.97#L379">379</a> if (tty->link && tty->link->write)<a name=L380 href="source/kernel/chr_drv/tty_io.c?v=0.97#L380">380</a> <a href="ident?v=0.97;i=TTY_WRITE_FLUSH">TTY_WRITE_FLUSH</a>(tty->link);<a name=L381 href="source/kernel/chr_drv/tty_io.c?v=0.97#L381">381</a> <a href="ident?v=0.97;i=current">current</a>->timeout = 0;<a name=L382 href="source/kernel/chr_drv/tty_io.c?v=0.97#L382">382</a> if (b-<a href="ident?v=0.97;i=buf">buf</a>)<a name=L383 href="source/kernel/chr_drv/tty_io.c?v=0.97#L383">383</a> return b-<a href="ident?v=0.97;i=buf">buf</a>;<a name=L384 href="source/kernel/chr_drv/tty_io.c?v=0.97#L384">384</a> if (<a href="ident?v=0.97;i=current">current</a>->signal & ~current->blocked)<a name=L385 href="source/kernel/chr_drv/tty_io.c?v=0.97#L385">385</a> return -<a href="ident?v=0.97;i=ERESTARTSYS">ERESTARTSYS</a>;<a name=L386 href="source/kernel/chr_drv/tty_io.c?v=0.97#L386">386</a> if (<a href="ident?v=0.97;i=file">file</a>->f_flags & <a href="ident?v=0.97;i=O_NONBLOCK">O_NONBLOCK</a>)<a name=L387 href="source/kernel/chr_drv/tty_io.c?v=0.97#L387">387</a> return -<a href="ident?v=0.97;i=EAGAIN">EAGAIN</a>;<a name=L388 href="source/kernel/chr_drv/tty_io.c?v=0.97#L388">388</a> return 0;<a name=L389 href="source/kernel/chr_drv/tty_io.c?v=0.97#L389">389</a> }<a name=L390 href="source/kernel/chr_drv/tty_io.c?v=0.97#L390">390</a> <a name=L391 href="source/kernel/chr_drv/tty_io.c?v=0.97#L391">391</a> static int <a href="ident?v=0.97;i=write_chan">write_chan</a>(unsigned int channel, struct <a href="ident?v=0.97;i=file">file</a> * <a href="ident?v=0.97;i=file">file</a>, char * <a href="ident?v=0.97;i=buf">buf</a>, int nr)<a name=L392 href="source/kernel/chr_drv/tty_io.c?v=0.97#L392">392</a> {<a name=L393 href="source/kernel/chr_drv/tty_io.c?v=0.97#L393">393</a> struct <a href="ident?v=0.97;i=tty_struct">tty_struct</a> * tty;<a name=L394 href="source/kernel/chr_drv/tty_io.c?v=0.97#L394">394</a> char c, *b=<a href="ident?v=0.97;i=buf">buf</a>;<a name=L395 href="source/kernel/chr_drv/tty_io.c?v=0.97#L395">395</a> <a name=L396 href="source/kernel/chr_drv/tty_io.c?v=0.97#L396">396</a> if (channel > 255)<a name=L397 href="source/kernel/chr_drv/tty_io.c?v=0.97#L397">397</a> return -<a href="ident?v=0.97;i=EIO">EIO</a>;<a name=L398 href="source/kernel/chr_drv/tty_io.c?v=0.97#L398">398</a> tty = <a href="ident?v=0.97;i=TTY_TABLE">TTY_TABLE</a>(channel);<a name=L399 href="source/kernel/chr_drv/tty_io.c?v=0.97#L399">399</a> if (<a href="ident?v=0.97;i=L_TOSTOP">L_TOSTOP</a>(tty) && (tty->pgrp > 0) &&<a name=L400 href="source/kernel/chr_drv/tty_io.c?v=0.97#L400">400</a> (<a href="ident?v=0.97;i=current">current</a>->tty == channel) && (tty->pgrp != <a href="ident?v=0.97;i=current">current</a>->pgrp)) {<a name=L401 href="source/kernel/chr_drv/tty_io.c?v=0.97#L401">401</a> if (<a href="ident?v=0.97;i=is_orphaned_pgrp">is_orphaned_pgrp</a>(tty->pgrp))<a name=L402 href="source/kernel/chr_drv/tty_io.c?v=0.97#L402">402</a> return -<a href="ident?v=0.97;i=EIO">EIO</a>;<a name=L403 href="source/kernel/chr_drv/tty_io.c?v=0.97#L403">403</a> if (!<a href="ident?v=0.97;i=is_ignored">is_ignored</a>(<a href="ident?v=0.97;i=SIGTTOU">SIGTTOU</a>))<a name=L404 href="source/kernel/chr_drv/tty_io.c?v=0.97#L404">404</a> return <a href="ident?v=0.97;i=tty_signal">tty_signal</a>(<a href="ident?v=0.97;i=SIGTTOU">SIGTTOU</a>, tty);<a name=L405 href="source/kernel/chr_drv/tty_io.c?v=0.97#L405">405</a> }<a name=L406 href="source/kernel/chr_drv/tty_io.c?v=0.97#L406">406</a> if (nr < 0)<a name=L407 href="source/kernel/chr_drv/tty_io.c?v=0.97#L407">407</a> return -<a href="ident?v=0.97;i=EINVAL">EINVAL</a>;<a name=L408 href="source/kernel/chr_drv/tty_io.c?v=0.97#L408">408</a> if (!nr)<a name=L409 href="source/kernel/chr_drv/tty_io.c?v=0.97#L409">409</a> return 0;<a name=L410 href="source/kernel/chr_drv/tty_io.c?v=0.97#L410">410</a> if (<a href="ident?v=0.97;i=redirect">redirect</a> && tty == <a href="ident?v=0.97;i=TTY_TABLE">TTY_TABLE</a>(0))<a name=L411 href="source/kernel/chr_drv/tty_io.c?v=0.97#L411">411</a> tty = <a href="ident?v=0.97;i=redirect">redirect</a>;<a name=L412 href="source/kernel/chr_drv/tty_io.c?v=0.97#L412">412</a> if (!(tty->write_q && tty->write))<a name=L413 href="source/kernel/chr_drv/tty_io.c?v=0.97#L413">413</a> return -<a href="ident?v=0.97;i=EIO">EIO</a>;<a name=L414 href="source/kernel/chr_drv/tty_io.c?v=0.97#L414">414</a> while (nr>0) {<a name=L415 href="source/kernel/chr_drv/tty_io.c?v=0.97#L415">415</a> if (<a href="ident?v=0.97;i=current">current</a>->signal & ~current->blocked)<a name=L416 href="source/kernel/chr_drv/tty_io.c?v=0.97#L416">416</a> break;<a name=L417 href="source/kernel/chr_drv/tty_io.c?v=0.97#L417">417</a> if (tty->link && !tty->link-><a href="ident?v=0.97;i=count">count</a>) {<a name=L418 href="source/kernel/chr_drv/tty_io.c?v=0.97#L418">418</a> <a href="ident?v=0.97;i=send_sig">send_sig</a>(<a href="ident?v=0.97;i=SIGPIPE">SIGPIPE</a>,<a href="ident?v=0.97;i=current">current</a>,0);<a name=L419 href="source/kernel/chr_drv/tty_io.c?v=0.97#L419">419</a> break;<a name=L420 href="source/kernel/chr_drv/tty_io.c?v=0.97#L420">420</a> }<a name=L421 href="source/kernel/chr_drv/tty_io.c?v=0.97#L421">421</a> if (<a href="ident?v=0.97;i=FULL">FULL</a>(tty->write_q)) {<a name=L422 href="source/kernel/chr_drv/tty_io.c?v=0.97#L422">422</a> <a href="ident?v=0.97;i=TTY_WRITE_FLUSH">TTY_WRITE_FLUSH</a>(tty);<a name=L423 href="source/kernel/chr_drv/tty_io.c?v=0.97#L423">423</a> <a href="ident?v=0.97;i=cli">cli</a>();<a name=L424 href="source/kernel/chr_drv/tty_io.c?v=0.97#L424">424</a> if (<a href="ident?v=0.97;i=FULL">FULL</a>(tty->write_q))<a name=L425 href="source/kernel/chr_drv/tty_io.c?v=0.97#L425">425</a> <a href="ident?v=0.97;i=interruptible_sleep_on">interruptible_sleep_on</a>(&tty->write_q->proc_list);<a name=L426 href="source/kernel/chr_drv/tty_io.c?v=0.97#L426">426</a> <a href="ident?v=0.97;i=sti">sti</a>();<a name=L427 href="source/kernel/chr_drv/tty_io.c?v=0.97#L427">427</a> continue;<a name=L428 href="source/kernel/chr_drv/tty_io.c?v=0.97#L428">428</a> }<a name=L429 href="source/kernel/chr_drv/tty_io.c?v=0.97#L429">429</a> while (nr>0 && !<a href="ident?v=0.97;i=FULL">FULL</a>(tty->write_q)) {<a name=L430 href="source/kernel/chr_drv/tty_io.c?v=0.97#L430">430</a> c=<a href="ident?v=0.97;i=get_fs_byte">get_fs_byte</a>(b);<a name=L431 href="source/kernel/chr_drv/tty_io.c?v=0.97#L431">431</a> if (<a href="ident?v=0.97;i=O_POST">O_POST</a>(tty)) {<a name=L432 href="source/kernel/chr_drv/tty_io.c?v=0.97#L432">432</a> if (c==<i>'\r'</i> && <a href="ident?v=0.97;i=O_CRNL">O_CRNL</a>(tty))<a name=L433 href="source/kernel/chr_drv/tty_io.c?v=0.97#L433">433</a> c=<i>'\n'</i>;<a name=L434 href="source/kernel/chr_drv/tty_io.c?v=0.97#L434">434</a> else if (c==<i>'\n'</i> && <a href="ident?v=0.97;i=O_NLRET">O_NLRET</a>(tty))<a name=L435 href="source/kernel/chr_drv/tty_io.c?v=0.97#L435">435</a> c=<i>'\r'</i>;<a name=L436 href="source/kernel/chr_drv/tty_io.c?v=0.97#L436">436</a> if (c==<i>'\n'</i> && <a href="ident?v=0.97;i=O_NLCR">O_NLCR</a>(tty) &&<a name=L437 href="source/kernel/chr_drv/tty_io.c?v=0.97#L437">437</a> !<a href="ident?v=0.97;i=set_bit">set_bit</a>(<a href="ident?v=0.97;i=TTY_CR_PENDING">TTY_CR_PENDING</a>,&tty->flags)) {<a name=L438 href="source/kernel/chr_drv/tty_io.c?v=0.97#L438">438</a> <a href="ident?v=0.97;i=put_tty_queue">put_tty_queue</a>(13,tty->write_q);<a name=L439 href="source/kernel/chr_drv/tty_io.c?v=0.97#L439">439</a> continue;<a name=L440 href="source/kernel/chr_drv/tty_io.c?v=0.97#L440">440</a> }<a name=L441 href="source/kernel/chr_drv/tty_io.c?v=0.97#L441">441</a> if (<a href="ident?v=0.97;i=O_LCUC">O_LCUC</a>(tty))<a name=L442 href="source/kernel/chr_drv/tty_io.c?v=0.97#L442">442</a> c=<a href="ident?v=0.97;i=toupper">toupper</a>(c);<a name=L443 href="source/kernel/chr_drv/tty_io.c?v=0.97#L443">443</a> }<a name=L444 href="source/kernel/chr_drv/tty_io.c?v=0.97#L444">444</a> b++; nr--;<a name=L445 href="source/kernel/chr_drv/tty_io.c?v=0.97#L445">445</a> <a href="ident?v=0.97;i=clear_bit">clear_bit</a>(<a href="ident?v=0.97;i=TTY_CR_PENDING">TTY_CR_PENDING</a>,&tty->flags);<a name=L446 href="source/kernel/chr_drv/tty_io.c?v=0.97#L446">446</a> <a href="ident?v=0.97;i=put_tty_queue">put_tty_queue</a>(c,tty->write_q);<a name=L447 href="source/kernel/chr_drv/tty_io.c?v=0.97#L447">447</a> }<a name=L448 href="source/kernel/chr_drv/tty_io.c?v=0.97#L448">448</a> if (nr>0)<a name=L449 href="source/kernel/chr_drv/tty_io.c?v=0.97#L449">449</a> <a href="ident?v=0.97;i=schedule">schedule</a>();<a name=L450 href="source/kernel/chr_drv/tty_io.c?v=0.97#L450">450</a> }<a name=L451 href="source/kernel/chr_drv/tty_io.c?v=0.97#L451">451</a> <a href="ident?v=0.97;i=TTY_WRITE_FLUSH">TTY_WRITE_FLUSH</a>(tty);<a name=L452 href="source/kernel/chr_drv/tty_io.c?v=0.97#L452">452</a> if (b-<a href="ident?v=0.97;i=buf">buf</a>)<a name=L453 href="source/kernel/chr_drv/tty_io.c?v=0.97#L453">453</a> return b-<a href="ident?v=0.97;i=buf">buf</a>;<a name=L454 href="source/kernel/chr_drv/tty_io.c?v=0.97#L454">454</a> if (tty->link && !tty->link-><a href="ident?v=0.97;i=count">count</a>)<a name=L455 href="source/kernel/chr_drv/tty_io.c?v=0.97#L455">455</a> return -<a href="ident?v=0.97;i=EPIPE">EPIPE</a>;<a name=L456 href="source/kernel/chr_drv/tty_io⌨️ 快捷键说明
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