Linux Certif

Toute la documentation sur la certification Linux LPI

termios

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termios, tcgetattr, tcsetattr, tcsendbreak, tcdrain, tcflush, tcflow, cfmakeraw, cfgetospeed, cfgetispeed, cfsetispeed, cfsetospeed, cfsetspeed - ¥¿¡¼¥ß¥Ê¥ë°À­¤Î¼èÆÀ¡¦ÀßÄê¡¢¥é¥¤¥óÀ©¸æ¡¢¥Ü¡¼¥ì¡¼¥È¤Î¼èÆÀ¡¦ÀßÄê

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#include <termios.h>
#include <unistd.h>

int tcgetattr(int fd, struct termios *termios_p);

int tcsetattr(int fd, int optional_actions, const struct termios *termios_p);

int tcsendbreak(int fd, int duration);

int tcdrain(int fd);

int tcflush(int fd, int queue_selector);

int tcflow(int fd, int action);

void cfmakeraw(struct termios *termios_p);

speed_t cfgetispeed(const struct termios *termios_p);

speed_t cfgetospeed(const struct termios *termios_p);

int cfsetispeed(struct termios *termios_p, speed_t speed);

int cfsetospeed(struct termios *termios_p, speed_t speed);

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tcflag_t c_iflag;      /* input modes */

tcflag_t c_oflag;      /* output modes */

tcflag_t c_cflag;      /* control modes */

tcflag_t c_lflag;      /* local modes */

cc_t     c_cc[NCCS];   /* control chars */

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VKILL

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VEOF

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VMIN

È󥫥Υ˥«¥ëÆɤ߹þ¤ß»þ¤ÎºÇ¾®Ê¸»ú¿ô¡£

VEOL

(0, NUL) ÄɲäιÔËöʸ»ú¡£ ICANON ¤¬¥»¥Ã¥È¤µ¤ì¤Æ¤¤¤ë¾ì¹ç¤Ëǧ¼±¤¹¤ë¡£

VTIME

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VEOL2

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VSWTCH

(POSIX ¤Ë¤Ï¤Ê¤¤; Linux ¤Ç¤ÏÂбþ¤·¤Æ¤¤¤Ê¤¤; 0, NUL) ¥¹¥¤¥Ã¥Áʸ»ú (shl ¤Ç¤Î¤ßÍѤ¤¤é¤ì¤ë)¡£

VSTART

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VSTOP

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VSUSP

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VDSUSP

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VLNEXT

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VWERASE

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VREPRINT

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VDISCARD

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VSTATUS

(POSIX ¤Ë¤Ï¤Ê¤¤; Linux ¤Ç¤ÏÂбþ¤·¤Æ¤¤¤Ê¤¤; ¾õÂÖÍ×µá: 024, DC4, Ctrl-T)

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üËö¤ÎÀßÄê¤Î¼èÆÀ¤ÈÊѹ¹

tcgetattr() ¤Ï fd ¤Ë´Ø¤¹¤ë¥Ñ¥é¥á¡¼¥¿¤ò¼èÆÀ¤·¡¢termios_p ¤¬»²¾È¤¹¤ë¹½ ¤ÂÎ termios ¤ËÀßÄꤹ¤ë¡£¤³¤Î´Ø¿ô¤Ï¥Ð¥Ã¥¯¥°¥é¥¦¥ó¥É¥×¥í¥»¥¹¤«¤é ¸Æ¤Ð¤ì¤ë¤³¤È¤â¤¢¤ë¤¬¡¢¤³¤Î¾ì¹ç¡¢Ã¼Ëö¤Î°À­¤Ï¥Õ¥©¥¢¥°¥é¥¦¥ó¥É¥×¥í¥»¥¹ ¤Ë¤è¤Ã¤ÆÊѲ½¤¹¤ë¤³¤È¤â¤¢¤ë¡£

tcsetattr() ¤ÏüËö¤Ë´ØÏ¢¤·¤¿¥Ñ¥é¥á¡¼¥¿¤òÀßÄꤹ¤ë (¥Ï¡¼¥É¥¦¥§¥¢¤ÎÀßÄê¤ËɬÍפǡ¢¤³¤³¤Ç ÀßÄê¤Ç¤­¤Ê¤¤¤â¤Î¤ò½ü¤¯)¡£ÀßÄê¤Ë¤Ï termios_p ¤¬»²¾È¤¹¤ë termios ¹½Â¤ÂΤòÍѤ¤¤ë¡£ optional_actions ¤Ë¤ÏÊѹ¹¤¬Í­¸ú¤È¤Ê¤ë¥¿¥¤¥ß¥ó¥°¤òÀßÄꤹ¤ë:

TCSANOW

¤¿¤À¤Á¤ËÊѹ¹¤¬Í­¸ú¤È¤Ê¤ë¡£

TCSADRAIN

fd ¤Ø¤Î½ÐÎϤ¬¤¹¤Ù¤ÆžÁ÷¤µ¤ì¤¿¸å¤ËÊѹ¹¤¬Í­¸ú¤Ë¤Ê¤ë¡£¤³¤Îµ¡Ç½¤Ï ½ÐÎϤ˱ƶÁ¤¹¤ë¥Ñ¥é¥á¡¼¥¿¤òÊѹ¹¤¹¤ë»þ¤Ë»ÈÍѤ¹¤ë¤Ù¤­¤Ç¤¢¤ë¡£

TCSAFLUSH

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¥«¥Î¥Ë¥«¥ë¥â¡¼¥É¤ÈÈ󥫥Υ˥«¥ë¥â¡¼¥É

c_lflag ¤Î ICANON ¥Õ¥é¥°¤ÎÀßÄê¤Ë¤è¤ê¡¢Ã¼Ëö¤¬¥«¥Î¥Ë¥«¥ë¥â¡¼¥É¤ÇÆ°ºî¤¹¤ë¤«¤¬·èÄꤵ¤ì¤ë¡£ ICANON ¤¬¥»¥Ã¥È¤µ¤ì¤¿¾ì¹ç¡¢¥«¥Î¥Ë¥«¥ë¥â¡¼¥É (canonical mode) ¤È¤Ê¤ê¡¢ ¥»¥Ã¥È¤µ¤ì¤Ê¤¤¾ì¹ç¡¢È󥫥Υ˥«¥ë¥â¡¼¥É (non-canonical mode) ¤È¤Ê¤ë¡£ ¥Ç¥Õ¥©¥ë¥È¤Ç¤Ï¡¢ ICANON ¤Ï¥»¥Ã¥È¤µ¤ì¤ë¡£

¥«¥Î¥Ë¥«¥ë¥â¡¼¥É¤Ç¤Ï¡¢°Ê²¼¤Î¤è¤¦¤ÊÆ°ºî¤È¤Ê¤ë¡£

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¹ÔÊÔ½¸¤¬Í­¸ú¤È¤Ê¤ë (ERASE, KILL ¤¬¸ú²Ì¤ò»ý¤Ä¡£ IEXTEN ¥Õ¥é¥°¤¬ÀßÄꤵ¤ì¤¿¾ì¹ç¤Ï¡¢ WERASE, REPRINT, LNEXT ¤â¸ú²Ì¤ò»ý¤Ä)¡£ read(2) ¤ÏºÇÂç¤Ç¤â 1¹Ô¤ÎÆþÎϤ·¤«ÊÖ¤µ¤Ê¤¤¡£ read(2) ¤¬Í׵ᤷ¤¿¥Ð¥¤¥È¿ô¤¬¸½ºß¤ÎÆþÎϹԤΥХ¤¥È¿ô¤è¤ê¤â¾¯¤Ê¤¤¾ì¹ç¡¢ Í׵ᤷ¤¿¤Î¤ÈƱ¤¸¥Ð¥¤¥È¿ô¤À¤±¤¬Æɤ߹þ¤Þ¤ì¡¢ »Ä¤ê¤Îʸ»ú¤Ï¼¡²ó¤Î read(2) ¤ÇÆɤ߹þ¤Þ¤ì¤ë¡£

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MIN > 0; TIME == 0: read(2) ¤Ï¡¢ÍøÍѲÄǽ¤Ê¥Ç¡¼¥¿¤¬ MIN ¥Ð¥¤¥È¤«Í×µá¥Ð¥¤¥È¿ô¤Î¤¤¤º¤ì¤«¤Ë㤹¤ë¤Þ¤Ç Ää»ß¤¹¤ë¡£ÊÖ¤êÃͤϡ¢MIN ¤«Í×µá¥Ð¥¤¥È¿ô¤Î¾®¤µ¤¤Êý¤È¤Ê¤ë¡£

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MIN == 0; TIME > 0: TIME ¤Ï¥¿¥¤¥Þ¤Î¾å¸Â¤òµ¬Äꤷ¡¢Ã±°Ì¤Ï 1/10 ÉäǤ¢¤ë¡£ ¥¿¥¤¥Þ¤Ï read(2) ¤¬¸Æ¤Ð¤ì¤¿»þÅÀ¤Ç³«»Ï¤µ¤ì¤ë¡£ read(2) ¤¬ÊÖ¤ë¤Î¤Ï¡¢¾¯¤Ê¤¯¤È¤â 1¥Ð¥¤¥È¤Î¥Ç¡¼¥¿¤¬ÍøÍѲÄǽ¤È¤Ê¤Ã¤¿»þÅÀ¡¢ ¤Þ¤¿¤Ï¥¿¥¤¥Þ¤¬»þ´ÖÀÚ¤ì¤È¤Ê¤Ã¤¿»þÅÀ¤Ç¤¢¤ë¡£ ÆþÎϤ¬Á´¤¯¤Ê¤¯¥¿¥¤¥Þ¤¬»þ´ÖÀÚ¤ì¤È¤Ê¤Ã¤¿¾ì¹ç¡¢ read(2) ¤Ï 0 ¤òÊÖ¤¹¡£

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MIN > 0; TIME > 0: TIME ¤Ï¥¿¥¤¥Þ¤Î¾å¸Â¤òµ¬Äꤷ¡¢Ã±°Ì¤Ï 1/10 ÉäǤ¢¤ë¡£ ÆþÎϤκǽé¤Î¥Ð¥¤¥È¤¬ÍøÍѲÄǽ¤Ë¤Ê¤Ã¤¿¸å¤Ï¡¢ ¿·¤¿¤Ë 1¥Ð¥¤¥È¼õ¿®¤¹¤ëÅ٤˥¿¥¤¥Þ¤¬¥ê¥»¥Ã¥È¤µ¤ì¤ë¡£ read(2) ¤¬ÊÖ¤ë¤Î¤Ï¡¢MIN ¥Ð¥¤¥È¤«Í×µá¥Ð¥¤¥È¿ô¤Î¤¦¤Á¾¯¤Ê¤¤Êý¤Þ¤ÇÆɤ߽Фµ¤ì¤¿»þÅÀ¤«¡¢ ¥Ð¥¤¥È´Ö¥¿¥¤¥Þ¤¬»þ´ÖÀÚ¤ì¤È¤Ê¤Ã¤¿»þÅÀ¤Ç¤¢¤ë¡£ ¤ÏºÇ½é¤Î¥Ð¥¤¥È¤¬ÍøÍѲÄǽ¤Ë¤Ê¤é¤Ê¤¤¤È¥¿¥¤¥Þ¤Ï³«»Ï¤µ¤ì¤Ê¤¤¤Î¤Ç¡¢ ¾¯¤Ê¤¯¤È¤â 1¥Ð¥¤¥È¤ÏÆɤ߹þ¤Þ¤ì¤ë¡£

Raw mode

cfmakeraw() ¤Ï¡¢Ã¼Ëö¤òÀΤΠVersion 7 üËö¥É¥é¥¤¥Ð¤Î "raw" ¥â¡¼¥É¤Î¤è¤¦¤ËÀßÄꤹ¤ë¡£ ÆþÎϤÏʸ»úñ°Ì¤Ë²Äǽ¤Ç¤¢¤ê¡¢¥¨¥³¡¼¤¬Ìµ¸ú¤È¤Ê¤ê¡¢ üËö¤ÎÆþ½ÐÎÏʸ»ú¤ËÂФ¹¤ëÆüì½èÍý¤Ï¤¹¤Ù¤Æ̵¸ú¤È¤Ê¤ë¡£ üËö¤Î°À­¤Ï°Ê²¼¤Î¤è¤¦¤ËÀßÄꤵ¤ì¤ë:

    termios_p->c_iflag &= ~(IGNBRK | BRKINT | PARMRK | ISTRIP

                    | INLCR | IGNCR | ICRNL | IXON);

    termios_p->c_oflag &= ~OPOST;

    termios_p->c_lflag &= ~(ECHO | ECHONL | ICANON | ISIG | IEXTEN);

    termios_p->c_cflag &= ~(CSIZE | PARENB);

    termios_p->c_cflag |= CS8;

¥é¥¤¥óÀ©¸æ

tcsendbreak() ¤ÏüËö¤¬ÈóƱ´ü¤Î¥·¥ê¥¢¥ë¥Ç¡¼¥¿Å¾Á÷¤òÍѤ¤¤Æ¤¤¤ë¾ì¹ç¤Ë¡¢ Ϣ³¤·¤¿0¤Î¥Ó¥Ã¥ÈÎó¤ò°ìÄê´Ö³Ö¤ÇžÁ÷¤¹¤ë¡£ duration ¤¬ 0 ¤Î¾ì¹ç¤Ï¡¢0 ¤Î¥Ó¥Ã¥È¤ò 0.25 Éðʾ塢 0.5 Éðʲ¼¤Î´Ö³Ö¤ÇžÁ÷¤¹¤ë¡£ duration ¤¬ 0 ¤Ç¤Ê¤¤¾ì¹ç¤Ï¡¢ 0 ¤Î¥Ó¥Ã¥È¤ò¼ÂÁõ°Í¸¤Î»þ´Ö´Ö³Ö¤ÇÁ÷¤ë¡£

üËö¤¬ÈóƱ´ü¤Î¥·¥ê¥¢¥ë¥Ç¡¼¥¿Å¾Á÷¥â¡¼¥É¤Ç¤Ê¤¤¾ì¹ç¡¢ tcsendbreak() ¤Ï²¿¤â¹Ô¤ï¤º¤ËÌá¤ë¡£

tcdrain() ¤Ï fd ¤¬¹Ô¤Ã¤Æ¤¤¤ë½ÐÎϤΞÁ÷¤¬´°Î»¤¹¤ë¤Þ¤ÇÂԤġ£

tcflush() ¤Ï fd ¤¬¹Ô¤Ã¤Æ¤¤¤ë¥Ç¡¼¥¿¤Î½ÐÎϤǤޤÀžÁ÷¤µ¤ì¤Æ¤¤¤Ê¤¤¤â¤Î¡¢¤¢¤ë¤¤¤Ï¼õ¿®¤· ¤¿¤¬¤Þ¤ÀÆþÎϤ·¤Æ¤¤¤Ê¤¤¤â¤Î¤òÇË´þ¤¹¤ë¡£¤¤¤º¤ì¤ò¹Ô¤¦¤«¤Ï queue_selector ¤ÎÃͤÇÄê¤á¤ë:

TCIFLUSH

¼õ¿®¤·¤¿¤¬Æɤó¤Ç¤¤¤Ê¤¤¥Ç¡¼¥¿¤ò¥Õ¥é¥Ã¥·¥å¤¹¤ë¡£

TCOFLUSH

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TCIOFLUSH

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tcflow() ¤Ï fd ¤Ç»ØÄꤵ¤ì¤¿¥ª¥Ö¥¸¥§¥¯¥È¤Ë¤ª¤±¤ë¥Ç¡¼¥¿¤ÎÁ÷¿®¤¢¤ë¤¤¤Ï¼õ¿®¤ò°ì»þŪ¤ËÃæÃǤ¹¤ë¡£ Á÷¿®¤È¼õ¿®¤Î¤É¤Á¤é¤«¤Ï¡¢ action¤Ç·è¤Þ¤ë:

TCOOFF

½ÐÎϤÎÃæÃÇ¡£

TCOON

ÃæÃǤ·¤¿½ÐÎϤκƳ«¡£

TCIOFF

STOP ʸ»ú¤ÎÁ÷¿®¡£ STOP ʸ»ú¤ÏüËö¥Ç¥Ð¥¤¥¹¤«¤é¥·¥¹¥Æ¥à¤Ø¤Î¥Ç¡¼¥¿Á÷¿®¤òÄä»ß¤¹¤ë¡£

TCION

START ʸ»ú¤ÎÁ÷¿®¡£ START ʸ»ú¤ÏüËö¥Ç¥Ð¥¤¥¹¤«¤é¥·¥¹¥Æ¥à¤Ø¤Î¥Ç¡¼¥¿Á÷¿®¤ò³«»Ï¤¹¤ë¡£

üËö¥Õ¥¡¥¤¥ë¤¬¥ª¡¼¥×¥ó¤µ¤ì¤¿¤È¤­¤Î¥Ç¥Õ¥©¥ë¥È¤Ç¤Ï¡¢ ÆþÎϤâ½ÐÎϤâÃæÃǤµ¤ì¤Æ¤¤¤Ê¤¤¡£

¥é¥¤¥ó®ÅÙ

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®ÅÙ¤ò B0 ¤ËÀßÄꤷ¤¿¾ì¹ç¡¢¥â¥Ç¥à¤ÏÄä»ß (hang up) ¤¹¤ë¡£ B38400 ¤Ë³ºÅö¤¹¤ë¼ÂºÝ¤Î¥Ó¥Ã¥È¥ì¡¼¥È¤Ï setserial(8) ¤Ç Êѹ¹¤Ç¤­¤ë¡£

ÆþÎϤª¤è¤Ó½ÐÎϥܡ¼¥ì¡¼¥È¤Ï termios ¹½Â¤ÂΤ˳ÊǼ¤µ¤ì¤ë¡£

cfgetospeed() ¤Ï termios_p ¤¬¼¨¤·¤Æ¤¤¤ë termios ¹½Â¤ÂΤ˳ÊǼ¤µ¤ì¤Æ¤¤¤ë ½ÐÎϥܡ¼¥ì¡¼¥È¤òÊÖ¤¹¡£

cfsetospeed() ¤Ï termios_p ¤Ç¼¨¤µ¤ì¤Æ¤¤¤ë termios ¹½Â¤ÂÎÃæ¤Î½ÐÎϥܡ¼¥ì¡¼¥È¤ò speed ¤ËÀßÄꤹ¤ë¡£Ãͤϰʲ¼¤Î¤¤¤º¤ì¤«¤Ç¤Ê¤±¤ì¤Ð¤Ê¤é¤Ê¤¤:

        B0

        B50

        B75

        B110

        B134

        B150

        B200

        B300

        B600

        B1200

        B1800

        B2400

        B4800

        B9600

        B19200

        B38400

        B57600

        B115200

        B230400

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