EXIT

NAME
SYNOPSIS æ»è§
DESCRIPTION æè¿°
RETURN VALUE è¿åå¼
CONFORMING TO æ ååè
NOTES è¦ç¹
SEE ALSO åè§
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NAME

exit - 使ç¨åºæ£å¸¸ä¸æ¢

SYNOPSIS æ»è§

#include <stdlib.h>

void exit(int status);

DESCRIPTION æè¿°

å½æ° exit() 使å¾ç¨åºæ£å¸¸ä¸æ¢ï¼status & 0377 çå¼è¢«è¿åç»ç¶è¿ç¨ (åè§ wait(2)) ãææç¨ atexit() å on_exit() 注åçå½æ°é½ä»¥ä¸æ³¨åæ¶ç¸åç顺åºè¢«ä¾æ¬¡æ§è¡ãä½¿ç¨ tmpfile() å建çæ件被å é¤ã

C æ åå®ä¹äºä¸¤ä¸ªå¼ EXIT_SUCCESS å EXIT_FAILUREï¼å¯ä»¥ä½ä¸º exit() çåæ°ï¼æ¥åå«æ示æ¯å¦ä¸ºæåéåºã

RETURN VALUE è¿åå¼

å½æ° exit() ä¸ä¼è¿åã

CONFORMING TO æ ååè

SVID 3, POSIX, BSD 4.3, ISO 9899 (‘‘ANSI C’’)

NOTES è¦ç¹

å¨ exit å¤çè¿ç¨ä¸ï¼å¯è½ä¼ä½¿ç¨ atexit() å on_exit() 注åå¶ä»çå½æ°ãé常ï¼æå注åçå½æ°è¢«ä»å·²æ³¨åå½æ°é¾ä¸- æä¸æ¥ï¼ç¶åæ§è¡ãå¦æå¨å¤çè¿ç¨ä¸ï¼åè°ç¨äº exit() æ longjmp()ï¼é£ä¹åççè¡ä¸ºæ¯æªå®ä¹çã

ç¸å¯¹äºä½¿ç¨ 0 åéé¶å¼ 1 æ -1ï¼ä½¿ç¨ EXIT_SUCCESS å EXIT_FAILURE å¯ä»¥ç¨å¾®å¢å ä¸äºå¯ç§»æ¤æ§ (对é Unix ç¯å¢)ãç¹å«çï¼VMS 使ç¨ä¸ç§ä¸åç约å®ã

BSD è¯å¾æ ååéåºä»£ç  - åè§æ件 <sysexits.h> ã

exit() ä¹åï¼éåºç¶æå¿é¡»ä¼ éç»ç¶è¿ç¨ãè¿éæä¸ç§æåµãå¦æç¶è¿ç¨å·²è®¾ç½®äº SA_NOCLDWAITï¼æèå·²å° SIGCHLD çå¤çå¥æ设置æäº SIG_IGNï¼è¿ä¸ªç¶æå°è¢«å¿½ç¥ãè¿æ¶è¦éåºçè¿ç¨ç«å³æ¶äº¡ãå¦æç¶è¿ç¨æ²¡æ表示å®å¯¹éåºç¶æä¸æå´è¶£ï¼ä»ä»æ¯ä¸åç- å¾ï¼é£ä¹è¦éåºçç¨åºåæä¸ä¸ªåµå°¸è¿ç¨ (‘‘zombie’’ï¼é¤äºåå«ä¸ä¸ªå- èçéåºç¶æå¤ï¼ä»ä¹ä¹ä¸æ¯)ãè¿æ ·å¨ç¶è¿ç¨åæ¥è°ç¨ wait() å½æ°æä¹ä¸æ¶ï¼å¯ä»¥å¾å°éåºç¶æã

å¦ææç¨å®ç°æ¯æ SIGCHLD ä¿¡å·ï¼ä¿¡å·å°è¢«åéå°ç¶è¿ç¨ãå¦æç¶è¿ç¨å·²è®¾ç½®äº SA_NOCLDWAITï¼å®è¢«åæ¶å®ä¹ã(?)

å¦æè¿ç¨æ¯ä¸ä¸ª session leaderï¼å®çæ§å¶ç»ç«¯æ¯ä¼è¯çæ§å¶ç»ç«¯ï¼é£ä¹è¿ä¸ªç»ç«¯çåå°è¿ç¨ç»çæ¯ä¸ªè¿ç¨é½å°æ¶å° SIGHUP ä¿¡å·ï¼ç»ç«¯å°ä¸è¿ä¸ªä¼è¯æå¼ï¼å¯ä»¥å被ä¸ä¸ªæ°çæ§å¶è¿ç¨è·å¾ã

å¦æè¿ç¨çéåºä½¿å¾ä¸ä¸ªè¿ç¨ç»æ为å¤å¿ï¼å¹¶ä¸è¿ä¸ªæ°è¿æ为å¤å¿çè¿ç¨ç»ä¸- ä»»ä½çè¿ç¨è¢«ä¸æ¢ï¼è¿ç¨ç»ä¸ææçè¿ç¨å°ä¾æ¬¡æ¶å° SIGHUP å SIGCONT ä¿¡å·ã

SEE ALSO åè§

_exit(2), wait(2), atexit(3), on_exit(3), tmpfile(3)

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æ¬é¡µé¢ä¸æçç±ä¸æ man æå页计åæä¾ã
ä¸æ man æå页计åï¼https://github.com/man-pages-zh/manpages-zh

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