[B! UNIX] KatagiriSoã®ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯

KatagiriSo id:KatagiriSo

UNIXã«é–¢ã™ã‚‹KatagiriSoã®ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯ (5)

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UNIX 6th code reading - ãƒãƒƒãƒ•ã‚¡ - ã‚„ã‚‹æ°—ã®ãªã„ãƒ–ãƒã‚°(A boring diary)
ã¯ã˜ã‚ã« ä»Šå›žã¯17ç« ã‚’èªã¿è§£ã„ã¦ã„ãã¾ã™ã€‚ 17ç« ã¯ãƒãƒƒãƒ•ã‚¡æ“ä½œã«é–¢ã™ã‚‹å†…å®¹ãŒæ›¸ã‹ã‚Œã¦ã„ã¾ã™ã€‚15-17ç« ã¯ãŠäº’ã„ã«é–¢é€£ã—ã¦ã„ã‚‹ã®ã§ç¹‹ãŒã‚Šã‚’æ„è˜ã—ãªãŒã‚‰èªã‚€ã¨ç†è§£ãŒã—ã‚„ã™ã„ã¨æ€ã„ã¾ã™ã€‚ ãƒãƒƒãƒ•ã‚¡ã®æ¦‚è¦ ãƒãƒƒãƒ•ã‚¡ã¨ã„ã†æ©Ÿæ§‹ã‚’ç”¨ã„ã¦ãƒ–ãƒãƒƒã‚¯ãƒ‡ãƒã‚¤ã‚¹ã‚’æ“ä½œã—ã¾ã™ã€‚ ãƒ–ãƒãƒƒã‚¯ãƒ‡ãƒã‚¤ã‚¹ã®æ“ä½œã§é‡è¦ãªã®ã¯ä»¥ä¸‹ã ã¨æ€ã„ã¾ã™ã€‚ è¤‡æ•°ã‚ã‚‹ãƒ—ãƒã‚»ã‚¹ãŒåŒæ™‚ã«(ã¨ã¯è¨€ã£ã¦ã‚‚æ™‚åˆ†å‰²ã•ã‚Œã¦ã„ã¾ã™ãŒ)åŒãƒ‡ãƒã‚¤ã‚¹ã®åŒãƒ–ãƒãƒƒã‚¯ã«ã‚¢ã‚¯ã‚»ã‚¹ã—ãŸã¨ãã«ã€ãƒ‡ãƒ¼ã‚¿ã®ä¸€è²«æ€§ã‚’ä¿ã¤(æ‰€è¬‚ã‚³ãƒ’ãƒ¼ãƒ¬ãƒ³ã‚·) ã‚ˆãä½¿ã‚ã‚Œã‚‹ãƒ‡ãƒã‚¤ã‚¹ã®ãƒ‡ãƒ¼ã‚¿ã‚’ã‚³ã‚¢ã«ã‚³ãƒ”ãƒ¼ã—ã¦ãŠãã“ã¨ã§ã€ãƒ‡ãƒã‚¤ã‚¹ã¸ã®ã‚¢ã‚¯ã‚»ã‚¹ã‚’æ¸›ã‚‰ã—å…¨ä½“ã®æ€§èƒ½ã‚’ä¸Šã’ã‚‹(ãƒ‡ãƒã‚¤ã‚¹ã¸ã®ã‚¢ã‚¯ã‚»ã‚¹ã¯ãƒ—ãƒã‚»ãƒƒã‚µã®å‹•ä½œã¨æ¯”è¼ƒã™ã‚‹ã¨é…ã„) ãƒãƒƒãƒ•ã‚¡ã®æ§‹æˆ ãƒãƒƒãƒ•ã‚¡ã¯4535è¡Œã§å®£è¨€ã•ã‚Œã¦ã„ã‚‹buf[NBUF]ã¨ã„ã†æ§‹é€ ä½“ã®é…åˆ—ã§ã™ã€‚bufã¯ãƒãƒƒãƒ•ã‚¡ã®çŠ¶æ…‹ã‚„ãƒ•ãƒ©ã‚°ã‚’è¡¨ã—ã€ãƒãƒƒãƒ•ã‚¡ã®ãƒ˜ãƒƒãƒ€ã¨ã‚‚è¨€ãˆã¾ã™ã€‚å®Ÿéš›ã«(ãƒ–ãƒ
KatagiriSo 2015/08/12
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POSIXã‚¹ãƒ¬ãƒƒãƒ‰ - Wikipedia
POSIXã‚¹ãƒ¬ãƒƒãƒ‰ ã¯ã€ã‚¹ãƒ¬ãƒƒãƒ‰ã®POSIXæ¨™æº–ã§ã‚ã‚‹ã€‚ã‚¹ãƒ¬ãƒƒãƒ‰ç”Ÿæˆã‚„ã‚¹ãƒ¬ãƒƒãƒ‰æ“ä½œã® API ã‚’å®šç¾©ã—ã¦ã„ã‚‹ã€‚ POSIXã‚¹ãƒ¬ãƒƒãƒ‰æ¨™æº–ã‚’å®Ÿè£…ã—ãŸãƒ©ã‚¤ãƒ–ãƒ©ãƒªã¯ Pthreads ã¨å‘¼ã°ã‚Œã‚‹ã“ã¨ãŒå¤šã„ã€‚Pthreads ã¯ä¸»ã«Unixç³»POSIXã‚·ã‚¹ãƒ†ãƒ ï¼ˆLinux ã‚„ Solarisï¼‰ã§ä½¿ã‚ã‚Œã¦ã„ã‚‹ãŒã€Microsoft Windows ç”¨å®Ÿè£…ã‚‚å˜åœ¨ã™ã‚‹ã€‚ä¾‹ãˆã°ã€pthreads-w32 ã¯ Pthreads ã® API ã®ã‚µãƒ–ã‚»ãƒƒãƒˆã‚’ã‚µãƒãƒ¼ãƒˆã—ã¦ã„ã‚‹[1]ã€‚ Pthreads ã¯Cè¨€èªžã®ãƒ‡ãƒ¼ã‚¿åž‹ã€é–¢æ•°ã€å®šæ•°ã‚’å®šç¾©ã—ã¦ã„ã‚‹ã€‚ãã®å®Ÿè£…ã¯ pthread.h ã¨ã„ã†ãƒ˜ãƒƒãƒ€ãƒ•ã‚¡ã‚¤ãƒ«ã¨ã‚¹ãƒ¬ãƒƒãƒ‰ãƒ©ã‚¤ãƒ–ãƒ©ãƒªã«ã‚ã‚‹ã€‚ã‚¹ãƒ¬ãƒƒãƒ‰ã®ã‚¹ãƒªãƒ¼ãƒ—ã¯ unistd.h ã® sleep() ã‚‚ã—ãã¯ time.h ã® nanosleep() ã‚’ä½¿ç”¨ã™ã‚‹ã€‚ ãƒ‡ãƒ¼ã‚¿åž‹: pthread_t: ã‚¹ãƒ¬ãƒƒãƒ‰ã¸ã®ãƒãƒ³ãƒ‰ãƒ« pthre
KatagiriSo 2015/05/20
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fork() can fail: this is important ã‚ãƒ¼ã€fork()ã®ã“ã¨ãã€‚ãƒ—ãƒã‚»ã‚¹ãŒã‚‚ã£ã¨ãƒ—ãƒã‚»ã‚¹ä½œã‚‹ãŸã‚ã®ã‚„ã¤ãªã€‚ã„ã‚„ã€ä»–ã«ã‚‚ãƒ—ãƒã‚»ã‚¹ä½œã‚‹æ–¹æ³•ã¯ã‚ã‚‹ã‘ã©ãªã€‚ã¾ã€é¢ç™½ã„è©±ãŒã‚‚ã†ã²ã¨ã¤ã‚ã‚‹ã‹ã‚‰èžã‹ã›ã¦ã‚„ã‚‹ã‚ˆã€‚ forkã¯å¤±æ•—ã™ã‚‹ã‚“ã ãœã€‚åˆ†ã‹ã£ã¦ã‚‹ã‹ï¼Ÿã€€ãƒžã‚¸ã§åˆ†ã‹ã£ã¦ã‚‹ã‹ï¼Ÿã€€ãƒžã‚¸ã ãœã€‚forkã¯å¤±æ•—ã™ã‚‹ã‚‚ã‚“ã ã€‚mallocã¨åŒã˜ã•ã€‚å¤±æ•—ã™ã‚‹ã“ã¨ã‚‚ã‚ã‚‹ã€‚ãã‚“ãªã«é »ç¹ã«ã£ã¦ã‚ã‘ã˜ã‚ƒãªã„ã‘ã©ã•ã€ã§ã‚‚å¤±æ•—ã—ãŸã‚‰ã€ç„¡è¦–ã§ãã£ã“ãªã„ãœã€‚ã¡ã£ã¨ã¯è„³ã¿ãåƒã‹ã›ãªãã‚ƒãªã‚‰ã‚“ã€‚ forkãŒ0ã‚’è¿”ã—ãŸã‚‰ã€ãã„ã¤ã¯åãƒ—ãƒã‚»ã‚¹ã§ã€è¦ªãªã‚‰æ£æ•°ã‚’è¿”ã™ã£ã¦ã“ã¨ã¯ã€ã¿ã‚“ãªçŸ¥ã£ã¦ã‚‹ã‚ˆãªã€‚ãã®å€¤ã¯åã®pidã ã€‚ã“ã„ã¤ã‚’ä¿å˜ã—ã¨ã„ã¦ã€ã‚ã¨ã§ä½¿ã†ã£ã¦ã‚ã‘ã ã€‚ å¤±æ•—ã‚’ç¢ºèªã—ãªã„å ´åˆã©ã†ãªã‚‹ã‹çŸ¥ã£ã¦ã‚‹ã‹ï¼Ÿã€€ãã†ã ã‚ˆã€‚ãŠå‰å¤šåˆ†ã€"-1"ï¼ˆforkã®ã‚¨ãƒ©ãƒ¼é€šçŸ¥ï¼‰ã‚’pidã¨ã—ã¦æ‰±ã£ã¦ã‚‹ã‚“ã ã‚ã€‚ ã•ã¦ã€å•é¡Œã®å§‹ã¾ã‚Šã ã€‚æœ¬å½“
KatagiriSo 2014/08/21
UNIX
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rsync ã®ã‚¦ã‚§ãƒ–ãƒšãƒ¼ã‚¸ã¸ã‚ˆã†ã“ãrsync ã¯ã€ã‚µã‚¤ã‚ºãŒã™ãå¤§ãããªã‚‹ãƒ•ã‚¡ã‚¤ãƒ«ã®è»¢é€ã«é©ã—ãŸã‚ªãƒ¼ãƒ—ãƒ³ã‚½ãƒ¼ã‚¹ã®ãƒ¦ãƒ¼ãƒ†ã‚£ãƒªãƒ†ã‚£ã§ã™ã€‚rsync ã¯ GNU General Public License ã«åŸºã¥ãã€è‡ªç”±ã«åˆ©ç”¨ã™ã‚‹ã“ã¨ãŒã§ãã¾ã™ã€‚ rsync 2.5.4rsync ã®æœ€æ–°ãƒãƒ¼ã‚¸ãƒ§ãƒ³ã¯ 2.5.4 ã§ã™ã€‚ ã“ã®ãƒãƒ¼ã‚¸ãƒ§ãƒ³ã®å¤‰æ›´ç‚¹ã¯ä»¥ä¸‹ã®é€šã‚Šã§ã™: rsync 2.5.4 (13 March 2002) "Imitation lizard skin" BUG FIXES: * Additional fix for zlib double-free bug. (Martin Pool, Andrew Tridgell) (CVE CAN-2002-0059) ENHANCEMENTS: * Merge in changes from zlib 1.1.3 to zlib 1.1.4.
KatagiriSo 2014/04/16
rsync

UNIX
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KatagiriSo 2013/10/30
UNIX

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