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seiunsky id:seiunsky

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seiunsky 2021/12/06
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ruby

unix
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Unixç³»OSã®æ¨©é™åˆ†é›¢ã®å¤‰é·ã«ã¤ã„ã¦ï¼ˆã‚‚ã—ãã¯ãªãœã€ã‚¢ãƒ—ãƒªå˜ä½ã®æ¨©é™åˆ†é›¢ãŒæ±‚ã‚ã‚‰ã‚Œã‚‹ã‚ˆã†ã«ãªã£ãŸã‹ï¼‰
Unixç³»OSã®æ¨©é™åˆ†é›¢ã®å¤‰é·ã«ã¤ã„ã¦ï¼ˆã‚‚ã—ãã¯ãªãœã€ã‚¢ãƒ—ãƒªå˜ä½ã®æ¨©é™åˆ†é›¢ãŒæ±‚ã‚ã‚‰ã‚Œã‚‹ã‚ˆã†ã«ãªã£ãŸã‹ï¼‰ [ãƒ–ã‚³ãƒ¡ã—ãŸä»¶ã«ã¤ã„ã¦ã€‚å¤§ç‹ã§ãŠã‹ã—ãªã“ã¨ã¯æ›¸ã„ã¦ãªã„ã¨æ€ã„ã¾ã™ãŒã€å‡ºå…¸ã¯ç¢ºèªã—ã¦ã„ã¾ã›ã‚“] Unixç³»OSã«ãŠã‘ã‚‹æ¨©é™åˆ†é›¢ã¯ã€ä¼çµ±çš„ã«ã€åˆ©ç”¨è€…ã”ã¨ã«ç•°ãªã‚‹user idã‚’å‰²ã‚ŠæŒ¯ã‚Šã€ã“ã‚Œã‚’ç”¨ã„ã¦ã‚¢ã‚¯ã‚»ã‚¹åˆ¶å¾¡ã‚’è¡Œã†ã¨ã„ã†æ–¹å¼ã§å®Ÿç¾ã•ã‚Œã¦ããŸã€‚ã¾ãŸã€ãƒ‡ãƒ¼ãƒ¢ãƒ³ãƒ—ãƒã‚»ã‚¹ã«ã¤ã„ã¦ã¯ã€ä¸è¦ãªæ¨©é™ä»˜ä¸Žã‚’é¿ã‘ã€ãƒ‡ãƒ¼ãƒ¢ãƒ³ãƒ—ãƒã‚»ã‚¹é–“ã®ç›¸äº’ä½œç”¨ã‚’æŠ‘åˆ¶ã™ã‚‹ãŸã‚ã«ã€ãƒ‡ãƒ¼ãƒ¢ãƒ³ã”ã¨ã«å°‚ç”¨ã®ã€Œuser idã€ã‚’ç™ºç•ªã™ã‚‹ã®ãŒä¸€èˆ¬çš„ãªæ…£ç¿’ã¨ã•ã‚Œã‚‹ã‚ˆã†ã«ãªã£ãŸã¨ã„ã†çµŒç·¯ãŒã‚ã‚‹ã€‚ ã—ã‹ã—ã€2000å¹´ä»£ã«å…¥ã‚‹ã¨ã€ã‚¤ãƒ³ã‚¿ãƒ¼ãƒãƒƒãƒˆã®æ™®åŠã¨ã‚ã„ã¾ã£ã¦ã€ã‚¯ãƒ©ã‚¤ã‚¢ãƒ³ãƒˆã‚µã‚¤ãƒ‰ã§ã¯ã“ã®ã‚ˆã†ãªã€Œåˆ©ç”¨è€…ã”ã¨ã€ã®æ¨©é™åˆ†é›¢ã§ã¯ä¸ååˆ†ã¨ã„ã†è€ƒãˆæ–¹ãŒã•ã‚Œã‚‹ã‚ˆã†ã«ãªã£ã¦ããŸã€‚å…·ä½“çš„ã«ã¯ã€ ï¼ˆã‚ªãƒ³ãƒ©ã‚¤ãƒ³ãƒãƒ³ã‚¯ã®ãƒ‘ã‚¹ãƒ¯ãƒ¼ãƒ‰ã«ä»£è¡¨ã•ã‚Œã‚‹ã‚ˆã†ãªï¼‰æ”»æ’ƒä¾¡å€¤ãŒé«˜ã„æƒ…å ±
seiunsky 2014/06/05
kazuho

unix
ãƒªãƒ³ã‚¯
How to change symlinks atomically - Tom Moertelâ€™s Blog
Many people donâ€™t realize that changing the target of a symbolic link (symlink) is not an atomic operation. â€œChangingâ€ a symlink really means deleting it and creating a new link with the same file name. For example, if I have a symlink current that points to a directory old, and I want to change it to point to a directory new, I might use the following command: $ ln -snf new current Strace shows w
seiunsky 2014/03/12
command

symlink

unix
ãƒªãƒ³ã‚¯
å…¥åŠ›ã¨å‡ºåŠ› | UNIX & Linux ã‚³ãƒžãƒ³ãƒ‰ãƒ»ã‚·ã‚§ãƒ«ã‚¹ã‚¯ãƒªãƒ—ãƒˆ ãƒªãƒ•ã‚¡ãƒ¬ãƒ³ã‚¹
å…¥åŠ›ã¨å‡ºåŠ› ãƒªãƒ€ã‚¤ãƒ¬ã‚¯ã‚·ãƒ§ãƒ³ã¨ãƒ‘ã‚¤ãƒ— ã‚³ãƒžãƒ³ãƒ‰ã®å®Ÿè¡Œçµæžœã¯é€šå¸¸ã€æ¨™æº–å‡ºåŠ›ã§ã‚ã‚‹ãƒ‡ã‚£ã‚¹ãƒ—ãƒ¬ã‚¤ã«å‡ºåŠ›ã•ã‚Œã‚‹ã€‚ã“ã®å®Ÿè¡Œçµæžœã¯ãƒªãƒ€ã‚¤ãƒ¬ã‚¯ã‚·ãƒ§ãƒ³(>ã€>>)ã‚„ãƒ‘ã‚¤ãƒ—(|)ã‚’ä½¿ç”¨ã™ã‚‹ã“ã¨ã«ã‚ˆã‚Šã€ãƒ‡ã‚£ã‚¹ãƒ—ãƒ¬ã‚¤ã§ã¯ãªããƒ†ã‚ã‚¹ãƒˆãƒ•ã‚¡ã‚¤ãƒ«ã‚„ã‚³ãƒžãƒ³ãƒ‰ã«å¯¾ã—ã¦å‡ºåŠ›ã™ã‚‹ã‚ˆã†ã«åˆ‡ã‚Šæ›¿ãˆã‚‹ã“ã¨ãŒã§ãã‚‹ã€‚ ã¾ãŸã€ãƒªãƒ€ã‚¤ãƒ¬ã‚¯ã‚·ãƒ§ãƒ³ã¯ã‚³ãƒžãƒ³ãƒ‰ã®å‡ºåŠ›å…ˆã‚’ãƒ†ã‚ã‚¹ãƒˆãƒ•ã‚¡ã‚¤ãƒ«ã«åˆ‡ã‚Šæ›¿ãˆã‚‹ä»¥å¤–ã«ã‚‚ã€ã“ã‚Œã¨ã¯é€†ã«ã‚³ãƒžãƒ³ãƒ‰ã¸ã®å…¥åŠ›å…ƒã‚’ãƒ†ã‚ã‚¹ãƒˆãƒ•ã‚¡ã‚¤ãƒ«ã«åˆ‡ã‚Šæ›¿ãˆã‚‹ã“ã¨ã‚‚ã§ãã‚‹ã€‚ ãªãŠã€ãƒªãƒ€ã‚¤ãƒ¬ã‚¯ã‚·ãƒ§ãƒ³ã¨ãƒ‘ã‚¤ãƒ—ã¯æ¬¡ã®ã‚ˆã†ã«ä½¿ã„åˆ†ã‘ã‚‹ã€‚ ãƒªãƒ€ã‚¤ãƒ¬ã‚¯ã‚·ãƒ§ãƒ³ ãƒ‡ãƒ¼ã‚¿ã‚’æ¸¡ã™å¯¾è±¡ãŒãƒ•ã‚¡ã‚¤ãƒ«ã§ã‚ã‚‹å ´åˆã¯ãƒªãƒ€ã‚¤ãƒ¬ã‚¯ã‚·ãƒ§ãƒ³ã‚’ä½¿ç”¨ã™ã‚‹ã€‚ ãƒ‘ã‚¤ãƒ— ãƒ‡ãƒ¼ã‚¿ã‚’æ¸¡ã™å¯¾è±¡ãŒã‚³ãƒžãƒ³ãƒ‰ã§ã‚ã‚‹å ´åˆã¯ãƒ‘ã‚¤ãƒ—ã‚’ä½¿ç”¨ã™ã‚‹ã€‚ ãƒªãƒ€ã‚¤ãƒ¬ã‚¯ã‚·ãƒ§ãƒ³ [>, Â», <] ã‚³ãƒžãƒ³ãƒ‰ã®å‡ºåŠ›ã‚’ file ã¸ä¸Šæ›¸ãã™ã‚‹ â†’ ã‚³ãƒžãƒ³ãƒ‰ã®å®Ÿè¡Œçµæžœã®å‡ºåŠ›å…ˆã‚’ã€ãƒ‡ã‚£ã‚¹ãƒ—ãƒ¬ã‚¤ã‹ã‚‰ãƒ•ã‚¡ã‚¤ãƒ«ã¸åˆ‡ã‚Šæ›¿ãˆãŸã„å ´åˆã¯ã€
seiunsky 2013/09/27
date

tips

unix
ãƒªãƒ³ã‚¯
Re: UNIX Command Idioms - ï¼ˆã²ï¼‰ãƒ¡ãƒ¢
Re: [twitter:@riywo]'s UNIX Command Idioms ps auxwwwwwww number of "w" depends on my mood in that day :D ps auxwwwwwwwww -L netstat -tna / -una / -tnl / -tnap tar xvf tar zxvf / jxvf / Jxvf are boring trailing slash in rsync rsync -av file [file] HOST:dir/ rsync -av dir/ HOST:dir/ tcpdump -i any -nlx strace -s 100 -fFTttt diff -u /path/to/file <(ssh host cat /path/to/file) see also: http://d.haten
seiunsky 2013/02/27
command

unix
ãƒªãƒ³ã‚¯
Big Sky :: Windowsã¸ã®ç§»æ¤ã‚‚è¦–é‡Žã«ã„ã‚ŒãŸãƒ—ãƒã‚°ãƒ©ãƒ ã‚’æ›¸ããªã‚‰èªã‚“ã§ãŠã„ã¦æ¬²ã—ã„äº‹
çµ¶å¯¾ãƒ‘ã‚¹ã®å…ˆé ã«/ãŒæ¥ã‚‹äº‹ã‚’æœŸå¾…ã—ã¦ã¯ã„ã‘ãªã„ ã—ã‹ã—ãªãŒã‚‰çµ¶å¯¾ãƒ‘ã‚¹ã®å…ˆé ã«ãƒ‰ãƒ©ã‚¤ãƒ–ãƒ¬ã‚¿ãƒ¼ãŒæ¥ã‚‹äº‹ã‚’æœŸå¾…ã—ã¦ã¯ã„ã‘ãªã„ UNCãƒ‘ã‚¹ã®ãƒ›ã‚¹ãƒˆåã‚„ã‚·ã‚§ã‚¢åã¯ãƒ‡ã‚£ãƒ¬ã‚¯ãƒˆãƒªã§ã¯ãªã„ã®ã§ãƒ•ã‚¡ã‚¤ãƒ«ã‚·ã‚¹ãƒ†ãƒ APIã¯ä½¿ãˆãªã„äº‹ã‚’æ„è˜ã—ã¦ãŠã unixã«æ¯”ã¹ãƒ‘ã‚¹å†…ã«ç©ºç™½æ–‡å—ãŒå…¥ã‚‹å¯èƒ½æ€§ãŒé«˜ã„äº‹ã‚’æ„è˜ã—ã¦ãŠã ãƒ›ãƒ¼ãƒ ãƒ‡ã‚£ãƒ¬ã‚¯ãƒˆãƒªã‚’æ„å‘³ã™ã‚‹ãƒ‘ã‚¹ã®å…ˆé ãƒãƒ«ãƒ€ã¯è‡ªå‰ã§å±•é–‹ã™ã‚‹å¿…è¦ãŒã‚ã‚Šã€ã¾ãŸãƒ‘ã‚¹ã®é€”ä¸ã«ãƒãƒ«ãƒ€ãŒæ··ã˜ã‚‹äº‹ã¯æ—¥å¸¸çš„ã«ã‚ã‚‹ ã‚½ã‚±ãƒƒãƒˆãƒ‡ã‚£ã‚¹ã‚¯ãƒªãƒ—ã‚¿ã«å¯¾ã—ã¦ã‚‚read/writeã§é€å—ä¿¡ã§ãã‚‹äº‹ã‚’æœŸå¾…ã—ã¦ã¯ã„ã‘ãªã„ ãƒ‘ã‚¤ãƒ—ã§ãªã„æ¨™æº–å…¥åŠ›ã®selectã¯ã‚„ã£ã¦ã‚‚æ„å‘³ãŒãªã„ ãƒ‡ã‚£ãƒ¬ã‚¯ãƒˆãƒªå†…ã«ã‚ã‚‹ãƒ•ã‚¡ã‚¤ãƒ«ã‚’é–‹ãã€ãƒãƒ³ãƒ‰ãƒ«ã‚’ä¿æŒã—ãŸã¾ã¾ãƒ‡ã‚£ãƒ¬ã‚¯ãƒˆãƒªã‚’æ¶ˆã›ã‚‹ã®ã¯å½“ãŸã‚Šå‰ã ã¨æ€ã‚ãªã„ ãƒ‘ã‚¹ã®ã‚»ãƒ‘ãƒ¬ãƒ¼ã‚¿ãŒ/Â¥ã§ã‚ã‚‹äº‹ã‚’æœŸå¾…ã—ã¦ANSI APIã‚’ä½¿ã£ã¦ã¯ã„ã‘ãªã„ Cãƒ©ãƒ³ã‚¿ã‚¤ãƒ (POSIXäº’æ›API)ã¨Windows APIã‚’
seiunsky 2012/05/07
api

windows

unix
ãƒªãƒ³ã‚¯
Working with UNIX Processes ã‚’èªã‚“ã - @kyanny's blog
Working With Unix Processes ã¨ã„ã†æœ¬ã‚’èªã‚“ã ã€‚ Thin ã®ä½œè€…ã‹ã‚‰ã®ã€Œæ™‚æœŸãƒãƒ¼ã‚¸ãƒ§ãƒ³ã‚’ä½œã‚‹ã¨ãå‚è€ƒã«ã™ã‚‹ã€ã¨ã„ã†ãƒ¡ãƒƒã‚»ãƒ¼ã‚¸*1ãŒæ·»ãˆã‚‰ã‚Œã¦ã„ãŸã®ã«æƒ¹ã‹ã‚Œã¦è²·ã£ãŸã€‚è‘—è€…ã®ã‚µã‚¤ãƒˆã§ç›´è²©ã—ã¦ã„ã‚‹ãŒã€ Kindle Store ã‹ã‚‰ã‚‚è³¼å…¥ã§ãã‚‹ã€‚ ã“ã®æœ¬ã¯ä¸€è¨€ã§ã„ã†ã¨ã€ UNIX ç³» OS ã®ãƒ—ãƒã‚»ã‚¹ã«ã¤ã„ã¦ã®æœ¬ã ã€‚ãƒ—ãƒã‚»ã‚¹ã¨ã¯ä½•ã‹ã€ã¨ã„ã†å°Žå…¥éƒ¨ã‹ã‚‰å§‹ã¾ã£ã¦ã€ãƒ—ãƒã‚»ã‚¹ ID ã‚„ãƒ—ãƒã‚»ã‚¹åã€çµ‚äº†ã‚³ãƒ¼ãƒ‰ã¸ã¨è¨€åŠã—ã€ fork(2) ã‚„ã‚½ãƒ³ãƒ“ãƒ—ãƒã‚»ã‚¹ã€ã‚·ã‚°ãƒŠãƒ«ã€ãã—ã¦ãƒ‡ãƒ¼ãƒ¢ãƒ³ãƒ—ãƒã‚»ã‚¹ã®èª¬æ˜Žã‚ãŸã‚Šã¾ã§æœ¬ç·¨ä¸ã§èª¬æ˜Žã—ã¦ã„ã‚‹ã€‚ UNIX ãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚°ã«é–¢ã™ã‚‹é¡žæ›¸ã¯ 1000 ãƒšãƒ¼ã‚¸ã‚’è¶…ãˆã‚‹ã‚‚ã®ãŒå¤šã„ãªã‹ã§ã€ã“ã®æœ¬ã¯ã‚ãšã‹ 100 ãƒšãƒ¼ã‚¸ã»ã©ã—ã‹ãªãå®¹æ˜“ãèªã‚ã‚‹*2ã€‚ã—ã‹ã—ãƒšãƒ¼ã‚¸æ•°ãŒå°‘ãªã„ã¶ã‚“ã€ã‚ã¾ã‚Šè¸ã¿è¾¼ã‚“ã å†…å®¹ã¨ã¯è¨€ãˆãšã€å…¨ä½“çš„ã«ã‚„ã‚„æµ…ã„å°è±¡ã‚’å—ã‘ãŸã€‚ã™ã§ã« UNIX, Li
seiunsky 2012/03/25
ã“ã‚Œã¯è²·ãŠã†

unix

ruby
ãƒªãƒ³ã‚¯
PCè¦šãˆæ›¸ã | ãƒ—ãƒã‚°ãƒ©ãƒ ã®ãƒ‡ãƒ¼ãƒ¢ãƒ³åŒ–
VvZX(qvZX)Afork()VXeR[gpBVXeR[oAovZXmAvZXRs[B ovZXevZXARs[VvZXqvZXBevZXAqvZXfork()lpB evZXAfork()qvZXvZXIDpAqvZX0pBplAevZXqvZXï½¯BlBAqvZXPvOï½¦B int main(void){ pid_t child // fork()li[ if( !(child=fork()) ){ // child=0qvZX printf("inchildprocess\n"); exit(0); } // evZXqvZXID\ï½¦ prinft("inparentprocess:childprocessID=%d\n,child); return 0; }
seiunsky 2012/02/22
ã“ã“ã«è©³ã—ãæ›¸ã„ã¦ã‚ã£ãŸ

tips

linux

unix

daemon
ãƒªãƒ³ã‚¯
åˆã‚ã¦ã®OS source code reading(UNIX 6th source code readingã®ã‚¹ã‚¹ãƒ¡) - ã‚„ã‚‹æ°—ã®ãªã„ãƒ–ãƒã‚°(A boring diary)
ã“ã®ã‚¨ãƒ³ãƒˆãƒªã¯http://d.hatena.ne.jp/takahirox/20120131/1328006885ã‚’å’Œè¨³ã—ãŸã‚‚ã®ã§ã™ã€‚ ã¯ã˜ã‚ã« æœ€è¿‘UNIX 6thã®ã‚½ãƒ¼ã‚¹ã‚³ãƒ¼ãƒ‰ã®èªæ›¸ãƒ¡ãƒ¢ã‚’æ›¸ãçµ‚ãˆã¾ã—ãŸã€‚ ã¿ã•ãªã‚“ã«ã‚‚UNIX 6thã®ã‚½ãƒ¼ã‚¹ã‚³ãƒ¼ãƒ‰ã‚’èªã‚€ã“ã¨ã‚’ã‚ªã‚¹ã‚¹ãƒ¡ã—ã¾ã™ã€‚ ãã®ç†ç”±ã‚’ã“ã®ã‚¨ãƒ³ãƒˆãƒªã§æ›¸ã„ã¦ã„ãã¾ã™ã€‚ ã¾ã¨ã‚ UNIX 6thã¯åˆã‚ã¦OSã®ã‚½ãƒ¼ã‚¹ã‚³ãƒ¼ãƒ‰ã‚’èªã‚€äººã«ã†ã£ã¦ã¤ã‘ï¼ã€€ä»Šã™ãèªã¿å§‹ã‚ã¾ã—ã‚‡ã†ï¼ UNIX 6thã®ã‚½ãƒ¼ã‚¹ã‚³ãƒ¼ãƒ‰ã¯ã“ã¡ã‚‰ãªã©ã§èªã‚€ã“ã¨ãŒã§ãã¾ã™ã€‚ http://minnie.tuhs.org/cgi-bin/utree.pl?file=V6 UNIX 6thã®ã‚½ãƒ¼ã‚¹ã‚³ãƒ¼ãƒ‰ã‚’èªã‚€ã“ã¨ã‚’ã‚ªã‚¹ã‚¹ãƒ¡ã™ã‚‹ç†ç”± ãŸã£ãŸã®10,000è¡Œ æœ€è¿‘ã®Linuxã‚«ãƒ¼ãƒãƒ«ã®ã‚½ãƒ¼ã‚¹ã‚³ãƒ¼ãƒ‰ã¯100ä¸‡è¡Œã‚’è¶…ãˆã¦ã„ã¾ã™ã€‚å…¨ã¦ã‚’ç†è§£ã™ã‚‹ã®ã¯è‡³é›£ã®æ¥ã§ã™ã€‚ ä¸€æ–¹ã€UNIX 6thã®ã‚«ãƒ¼
seiunsky 2012/02/12
10000è¡Œãã‚‰ã„ãªã®ã‹â€¦â€¦

unix

os
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æŠ€è¡“/UNIX/ãªãœnohupã‚’ãƒãƒƒã‚¯ã‚°ãƒ©ãƒ³ãƒ‰ã‚¸ãƒ§ãƒ–ã¨ã—ã¦èµ·å‹•ã™ã‚‹ã®ãŒå®šç•ªãªã®ã‹ï¼Ÿ(æ“¬ä¼¼ç«¯æœ«, Pseudo Terminal, SIGHUPä»–) - Glamenv-Septzen.net
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seiunsky 2011/05/21
unix

shell
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Rubyï¼ˆLinuxï¼‰: ãƒ‘ã‚¤ãƒ—ã¨ãƒ—ãƒã‚»ã‚¹ã® fork/exec ã‚’ä½¿ã„å¤–éƒ¨ã‚³ãƒžãƒ³ãƒ‰ã¨å…¥å‡ºåŠ›ã‚’ã‚„ã‚Šã¨ã‚Šã™ã‚‹ | anobota
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seiunsky 2011/02/22
unix

tips

ruby
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seiunsky 2009/03/08
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security
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seiunsky 2008/12/04
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seiunsky 2008/12/01
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