[B! unix] mogwaingã®ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯

mogwaing id:mogwaing

unixã«é–¢ã™ã‚‹mogwaingã®ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯ (22)

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Unix Programming Frequently Asked Questions æ—¥æœ¬èªžè¨³ - 1 ãƒ—ãƒã‚»ã‚¹åˆ¶å¾¡ - 1.6 ã©ã†ã™ã‚Œã°ã‚¾ãƒ³ãƒ“ãƒ—ãƒã‚»ã‚¹ãŒã§ãã‚‹ã“ã¨ã‚’é˜²ãã“ã¨ãŒã§ãã¾ã™ã‹?
Go to the first, previous, next, last section, table of contents. 1 ãƒ—ãƒã‚»ã‚¹åˆ¶å¾¡ 1.1 æ–°ã—ã„ãƒ—ãƒã‚»ã‚¹ã®ç”Ÿæˆ: fork() 1.1.1 fork()ã¯ä½•ã‚’ã™ã‚‹ã®ã§ã™ã‹? #include <sys/types.h> #include <unistd.h> pid_t fork(void); fork()é–¢æ•°ã¯å˜åœ¨ã—ã¦ã„ã‚‹ãƒ—ãƒã‚»ã‚¹ã‹ã‚‰æ–°ã—ã„ãƒ—ãƒã‚»ã‚¹ã‚’ç”Ÿæˆã™ã‚‹ãŸã‚ã«ä½¿ç”¨ã• ã‚Œã¾ã™ã€‚æ–°ã—ã„ãƒ—ãƒã‚»ã‚¹ã‚’åãƒ—ãƒã‚»ã‚¹ã¨ã„ã„ã€ã™ã§ã«å˜åœ¨ã—ã¦ã„ãŸãƒ—ãƒã‚»ã‚¹ã¯è¦ª ãƒ—ãƒã‚»ã‚¹ã¨ã„ã„ã¾ã™ã€‚fork()ã®æˆ»ã‚Šå€¤ã‚’ãƒã‚§ãƒƒã‚¯ã™ã‚‹ã¨ã€ã“ã®ä¸¡è€…ã‚’åŒºåˆ¥ã§ãã¾ ã™ã€‚è¦ªãƒ—ãƒã‚»ã‚¹ã«ã¯åãƒ—ãƒã‚»ã‚¹ã®ãƒ—ãƒã‚»ã‚¹IDãŒè¿”ã•ã‚Œã¾ã™ãŒã€åãƒ—ãƒã‚»ã‚¹ã«ã¯ 0ãŒè¿”ã•ã‚Œã‚‹ã®ã§ã™ã€‚ ã§ã™ã‹ã‚‰ã€ä»¥ä¸‹ã®ç°¡å˜ãªã‚³ãƒ¼ãƒ‰ãŒfork()ã®ä½¿ã„æ–¹ã®åŸºæœ¬ã«ãªã‚Šã¾ã™ã€‚ pid_t pid; switch
mogwaing 2010/06/23
daemon

unix
ãƒªãƒ³ã‚¯
å½å½å¤œé£Ÿæ—¥è¨˜: daemonèµ·å‹•æ™‚ã®äºŒé‡forkã®ç†ç”± (2005-03-16 )
ã‚«ãƒ†ã‚´ãƒª: UNIX daemonãƒ—ãƒã‚»ã‚¹ã‚’èµ·å‹•ã™ã‚‹éš›ã«2å›žforkã™ã‚‹ã¨ã„ã†ã®ã¯ã€ã‚‚ã¯ã‚„FAQã®é ˜åŸŸã«ã‚ã‚‹ã“ã¨ã ãŒã€ãªãœ2å›žforkã™ã‚‹å¿…è¦ãŒã‚ã‚‹ã®ã‹ã€ãã‚Œãžã‚Œã®forkã«ã©ã†ã„ã†åŠ¹æžœãŒã‚ã‚‹ã®ã‹ã¨ã„ã†ã“ã¨ã¾ã§æ›¸ã„ã¦ã‚ã‚‹ã‚‚ã®ã¯å°‘ãªã„ã€‚ç§ã‚‚ä»Šã¾ã§ç–‘å•ã«æ€ã„ã¤ã¤æ”¾ç½®ã—ã¦ã„ãŸãŒã€ã¤ã„ã«ãã®ã“ã¨ã«ã¤ã„ã¦æ›¸ã‹ã‚Œã¦ã„ã‚‹ã‚‚ã®ãŒè¦‹ã¤ã‹ã£ãŸã€‚ Unix Programming Frequently Asked Questions æ—¥æœ¬èªžè¨³ - 1 ãƒ—ãƒã‚»ã‚¹åˆ¶å¾¡ 1.7 ãƒ—ãƒã‚°ãƒ©ãƒ ã‚’ãƒ‡ãƒ¼ãƒ¢ãƒ³ã¨ã—ã¦å‹•ã‹ã™ã«ã¯ã©ã†ã™ã‚Œã°ã„ã„ã§ã™ã‹? ã“ã‚Œã‚’ãã¡ã‚“ã¨ç†è§£ã™ã‚‹ã«ã¯ã€ã‚»ãƒƒã‚·ãƒ§ãƒ³ã¨åˆ¶å¾¡ç«¯æœ«ã«ã¤ã„ã¦ã‚ˆã‚Šè©³ã—ãçŸ¥ã‚‹å¿…è¦ãŒã‚ã‚‹ã€‚ã‚»ãƒƒã‚·ãƒ§ãƒ³ã¨ã¯ã€ãƒ¦ãƒ¼ã‚¶ãƒ¼ãŒã¨ã‚ã‚‹ç«¯æœ«ã‹ã‚‰ãƒã‚°ã‚¤ãƒ³ã—ã¦ç”Ÿæˆã—ãŸãƒ—ãƒã‚»ã‚¹ã®é›†åˆã§ã‚ã‚‹ã€‚ãƒ¦ãƒ¼ã‚¶ãƒ¼ã¯ç«¯æœ«ã®ã‚ãƒ¼æ“ä½œã«ã‚ˆã‚Šãƒ—ãƒã‚»ã‚¹ã®ä¸€æ™‚åœæ¢ã‚„çµ‚äº†ãªã©ã®åˆ¶å¾¡ã‚’è¡Œã†ã“ã¨ãŒã§ãã‚‹ãŒã€ã‚»ãƒƒã‚·ãƒ§ãƒ³ã¯ã“ã®åˆ¶å¾¡ã®å½±éŸ¿ç¯„å›²ã‚’
mogwaing 2010/06/23
daemon

unix
ãƒªãƒ³ã‚¯
POSIXæº–æ‹ ã®éžåŒæœŸI/O - takkan_mã®No planãªæ—¥å¸¸
ã“ã‚Œã¯ã€ãƒ©ã‚¤ãƒ–ãƒ©ãƒªé–¢æ•°ã¨ã—ã¦å®Ÿè£…ã•ã‚Œã¦ãŠã‚Šã€ä»¥ä¸‹ã®é–¢æ•°ç¾¤ã‚’æŒã¡ã¾ã™ã€‚ aio_read(),aio_write(),aio_fsync(),aio_error() aio_return(),aio_cancel(),aio_suspend()è©³ã—ã„ä½¿ã„æ–¹ã¯èª¬æ˜Žã—ã¾ã›ã‚“ãŒã€aio_read(),aio_write()ã‚’ä½¿ã„ã€I/Oè¦æ±‚ã‚’ç™ºè¡Œã—ã¾ã™ã€‚I/Oè¦æ±‚ã¯ã€ãã‚Œãžã‚Œã®é–¢æ•°ä¸ã§è¦æ±‚ã‚’ç™ºè¡Œã—ãŸæ®µéšŽã§å¾©å¸°ã—ã¦ãã‚Œã¾ã™ã€‚ ã§ã¯æ¬¡ã®ã‚ˆã†ãªã€aio_readã‚’è¡Œã†ãƒ—ãƒã‚°ãƒ©ãƒ ã‚’æ›¸ã„ã¦ã€ã“ã®ãƒ©ã‚¤ãƒ–ãƒ©ãƒªé–¢æ•°ãŒã©ã®ã‚ˆã†ã«å®Ÿè£…ã•ã‚Œã¦ã„ã‚‹ã‹ã‚’è¦‹ã¦ã¿ã¾ã™ã€‚aio_readã®å‹•ä½œãŒè¦‹ãŸã„ã ã‘ãªã®ã§ã€ãŸã¶ã‚“ã€ã“ã®éžåŒæœŸI/Oãƒ©ã‚¤ãƒ–ãƒ©ãƒªã®ä½¿ã„æ–¹ã¨ã—ã¦ã¯ã€ã ã‚ã ã‚ã§ã™ã€‚ #include <stdlib.h> #include <sys/types.h> #include <sys/stat.h> #include <s
mogwaing 2010/05/03
aio

posix

unix
ãƒªãƒ³ã‚¯
Unix File System - Wikipedia
Unix File System (UFS) ã¨ã¯ã€Unixç³»ã‚ªãƒšãƒ¬ãƒ¼ãƒ†ã‚£ãƒ³ã‚°ã‚·ã‚¹ãƒ†ãƒ (OS) ã«ãŠã„ã¦ä½¿ç”¨ã•ã‚Œã‚‹ãƒ•ã‚¡ã‚¤ãƒ«ã‚·ã‚¹ãƒ†ãƒ ã§ã‚ã‚‹ã€‚ ã¾ãŸå›ºæœ‰ã®ãƒ•ã‚¡ã‚¤ãƒ«ã‚·ã‚¹ãƒ†ãƒ ã‚’æŒ‡ã™è¨€è‘‰ã§ã¯ãªãã€Version 7 Unixã®ãƒ•ã‚¡ã‚¤ãƒ«ã‚·ã‚¹ãƒ†ãƒ ãŠã‚ˆã³ãã“ã‹ã‚‰æ´¾ç”Ÿã—ãŸä¸€é€£ã®ãƒ•ã‚¡ã‚¤ãƒ«ã‚·ã‚¹ãƒ†ãƒ ã®ç·ç§°ã§ã‚ã‚‹ã€‚ ä¸€èˆ¬ã«UFSã¨å‘¼ã¶å ´åˆã¯4.2BSDã§å®Ÿè£…ã•ã‚ŒãŸ Fast File System (FFS) ã®ã“ã¨ã‚’æŒ‡ã™å ´åˆãŒå¤šã[è¦å‡ºå…¸]ã€ä»–ã«ã¯FFFSã€UFS2ã€UFS Loggingç‰ãŒå˜åœ¨ã™ã‚‹ã€‚ UFSãƒœãƒªãƒ¥ãƒ¼ãƒ ã¯ä»¥ä¸‹ã®éƒ¨åˆ†ã‹ã‚‰æ§‹æˆã•ã‚Œã‚‹ã€‚ ãƒ‘ãƒ¼ãƒ†ã‚£ã‚·ãƒ§ãƒ³ã®å…ˆé æ•°ãƒ–ãƒãƒƒã‚¯ã¯ãƒ–ãƒ¼ãƒˆãƒ–ãƒãƒƒã‚¯ã¨ã—ã¦äºˆç´„ã•ã‚Œã¦ã„ã‚‹ï¼ˆãƒ•ã‚¡ã‚¤ãƒ«ã‚·ã‚¹ãƒ†ãƒ ã¨ã¯åˆ¥ã«åˆæœŸåŒ–ã™ã‚‹å¿…è¦ãŒã‚ã‚‹ï¼‰ã€‚ UFSã§ã‚ã‚‹ã“ã¨ã‚’ç¤ºã™ãƒžã‚¸ãƒƒã‚¯ãƒŠãƒ³ãƒãƒ¼ã‚„ãƒ•ã‚¡ã‚¤ãƒ«ã‚·ã‚¹ãƒ†ãƒ ã®æ§‹æˆã‚’ç¤ºã™åŸºæœ¬çš„ãªå€¤ã‚„çµ±è¨ˆæƒ…å ±ã‚„ãƒãƒ¥ãƒ¼ãƒ‹ãƒ³ã‚°ãƒ‘ãƒ©ãƒ¡ãƒ¼ã‚¿ã‚’å«ã‚€ã‚¹ãƒ¼ãƒ‘ãƒ¼ãƒ–ãƒãƒƒã‚¯ã€‚ ã‚·ãƒªãƒ³ãƒ€ã‚°
mogwaing 2010/03/29
cylinder groupsãªã©

ufs

ffs

unix
ãƒªãƒ³ã‚¯
Asynchronous I/O (The GNU C Library)
mogwaing 2010/03/16
asynchronous i/o

aio

libc

posix
ãƒªãƒ³ã‚¯
Charming Python: Functional programming in Python, Part 3
IBM Developer is your one-stop location for getting hands-on training and learning in-demand skills on relevant techno logies such as generative AI, data science, AI, and open source.
mogwaing 2009/03/07
linux

aio

to see

unix

posix
ãƒªãƒ³ã‚¯
UNIXã‚·ã‚°ãƒŠãƒ«ãƒ¡ãƒ¢(Hishidama's UNIX Signal Memo)
UNIXã¯ãƒ—ãƒã‚»ã‚¹ã«å¯¾ã—ã¦ã‚·ã‚°ãƒŠãƒ«ã‚’é€ã£ã¦å‰²ã‚Šè¾¼ã¿å‡¦ç†ã‚’ã•ã›ã‚‹ã“ã¨ãŒå‡ºæ¥ã‚‹ã€‚ ãƒ—ãƒã‚°ãƒ©ãƒ å´ã¯ã‚·ã‚°ãƒŠãƒ«ã‚’ãƒžã‚¹ã‚¯ã™ã‚‹ã“ã¨ã«ã‚ˆã£ã¦ã€ã‚·ã‚°ãƒŠãƒ«ã‚’æ•æ‰ã—ã¦ç‹¬è‡ªã®å‡¦ç†ã‚’è¡Œã†ã“ã¨ãŒå‡ºæ¥ã‚‹ã€‚ ã‚·ã‚°ãƒŠãƒ«ã®ç¨®é¡žã¯UNIXã®ç¨®é¡žã«ã‚ˆã£ã¦ç•°ãªã‚‹ã®ã§ã€è‡ªåˆ†ã§ä½¿ã†OSã«åˆã‚ã›ã‚‹å¿…è¦ãŒã‚ã‚‹ã€‚ï¼ˆkillã‚³ãƒžãƒ³ãƒ‰ã‚’ä½¿ãˆã°ã€ãã®OSãŒã©ã®ã‚·ã‚°ãƒŠãƒ«ã‚’ã‚µãƒãƒ¼ãƒˆã—ã¦ã„ã‚‹ã®ã‹ç¢ºèªã§ãã‚‹ï¼‰ ã‚·ã‚°ãƒŠãƒ«ã®ãƒžã‚¹ã‚¯ sigtest.cï¼š #include <stdio.h> #include <signal.h> #include <pthread.h> void* SignalThread(void* arg) { sigset_t set; int r; //setã‚’åˆæœŸåŒ– r = sigfillset(&set); if (r != 0) return NULL; //ãƒ‡ãƒ•ã‚©ãƒ«ãƒˆå‹•ä½œã‚’è¡Œã†ã‚·ã‚°ãƒŠãƒ«ã‚’æŒ‡å®šï¼ˆãƒžã‚¹ã‚¯å¯¾è±¡ã‹ã‚‰å¤–ã™ï¼‰ r = s
mogwaing 2009/01/11
unix

signal
ãƒªãƒ³ã‚¯
NFSã¨NIS
lookup() 2.2.5. Look Up File Name diropres NFSPROC_LOOKUP(diropargs) = 4; If the reply "status" is NFS_OK, then the reply "file" and reply "attributes" are the file handle and attributes for the file "name" in the directory given by "dir" in the argument. 2.3.10. diropargs struct diropargs { fhandle dir; filename name; }; The "diropargs" structure is used in directory operations. The "fhandle" "di
mogwaing 2008/09/29
nfs

nis

unix
ãƒªãƒ³ã‚¯
Yahoo!ãƒ¡ãƒ«ãƒžã‚¬ - UNIX/Linuxã‚³ãƒžãƒ³ãƒ‰ Topics > ã€UNIX/Linuxã‚³ãƒžãƒ³ãƒ‰ Topicsã€‘ ã€Žè¨ˆç®—ã‚’ã™ã‚‹ã€ No.051
mogwaing 2008/09/15
unix

command
ãƒªãƒ³ã‚¯
Cè¨€èªž: write(2)ã®æ£ã—ã„ä½¿ã„æ–¹
Created: Kazuki Ohta, 2006/04/17 Last Update: Kazuki Ohta, 2006/06/14 å¦æ ¡ã®èª²é¡Œ(OSæ¼”ç¿’)ã§ã€open, read, write, closeç‰ã®ã‚·ã‚¹ãƒ†ãƒ ã‚³ãƒ¼ãƒ«ã‚’ä½¿ç”¨ã—ãŸèª²é¡ŒãŒå‡ºã•ã‚ŒãŸã€‚ã‚·ã‚¹ãƒ†ãƒ ã‚³ãƒ¼ãƒ«ãªã®ã§å½“ç„¶å¤±æ•—ã™ã‚‹äº‹ãŒæœ‰ã‚Šã€ã‚¨ãƒ©ãƒ¼ãƒã‚§ãƒƒã‚¯ã‚’æ£ã—ãè¡Œã†å¿…è¦ãŒæœ‰ã‚‹ã®ã ãŒã€writeã«ã¤ã„ã¦ã¯webä¸Šã«æœ‰ã‚‹è³‡æ–™ã‚‚ä½¿ã„æ–¹ã‚’é–“é•ã£ã¦ã„ã‚‹ãƒ¢ãƒŽãŒå¤šã‹ã£ãŸã€‚åƒ•ã‚‚èª²é¡Œã§ã¯é–“é•ãˆã¦å†æå‡ºã‚’ãã‚‰ã£ã¦ã—ã¾ã£ãŸã€‚ãªã®ã§ã€ã“ã“ã«writeã‚·ã‚¹ãƒ†ãƒ ã‚³ãƒ¼ãƒ«ã®æ£ã—ã„ä½¿ã„æ–¹ã‚’æ›¸ãè¨˜ã—ã¦ãŠãã€‚ ã¾ãšã¯ $man 2 write ã®ä¸€éƒ¨ã‚’æŠœç²‹ã—ã¦ã¿ã‚‹ã€‚ NAME write - write to a file descriptor SYNOPSIS #include ssize_t write(int fd, const void *buf, si
mogwaing 2008/05/05
write

system call

c

unix
ãƒªãƒ³ã‚¯
Unix Toolbox
This document is a collection of Unix/Linux/BSD commands and tasks which are useful for IT work or for advanced users. This is a practical guide with concise explanations, however the reader is supposed to know what s/he is doing. Unix Toolbox revision 14.5 The latest version of this document can be found at http://cb.vu/unixtoolbox.xhtml. Replace .xhtml on the link with .pdf for the PDF version a
mogwaing 2008/03/25
unix

reference

command

tips
ãƒªãƒ³ã‚¯
ã©ã•ã«ã£ã - #!/usr/bin/env
2006å¹´6æœˆ21æ—¥(æ°´) â– DomainKeys _ ãˆãƒ¼ã¨ã€DomainKeys ã£ã¦ã®ã¯è¦ã™ã‚‹ã«é›»åç½²åãªã®ã§ã€ç½²åã•ã‚ŒãŸå¾Œã§ãƒ˜ãƒƒãƒ€ã‚„æœ¬æ–‡ãŒæ”¹å¤‰ã•ã‚Œã‚‹ã¨æ¤œè¨¼ã«å¤±æ•—ã™ã‚‹ã€‚DomainKeys ã¯ãƒ¡ãƒ¼ãƒªãƒ³ã‚°ãƒªã‚¹ãƒˆã«å¼±ã„ã¨è¨€ã‚ã‚Œã‚‹ç†ç”±ã®ã²ã¨ã¤ã§ã™ãªã€‚ _ è‡ªå®… postfix ã« milter ã‚’å°Žå…¥ã—ãŸã®ã§ã€DomainKeys ã‚’æ¤œè¨¼ã§ãã‚‹ã‚ˆã†ã«ã—ã¦ã“ã®ã‚ãŸã‚Šã®å‹•ä½œã‚’æ³¨æ„æ·±ãè¦³å¯Ÿã—ã¦ã‚‹ã®ã ãŒã€ã“ã®ã¾ãˆã¯ã˜ã¾ã£ãŸ DNSOPS.JPã®ãƒ¡ãƒ¼ãƒªãƒ³ã‚°ãƒªã‚¹ãƒˆã‹ã‚‰ã®ãƒ¡ãƒ¼ãƒ«ã€‚ Authentication-Results: mx.maya.st sender=ãƒãƒœãƒƒãƒˆã«ã‚ˆã‚‹åŽé›†å›žé¿@dnsops.jp; domainkeys=pass ãªã‚“ã§ pass ã—ã¨ã‚“ãã‚“ã€‚ML ãŒ Subject ã‚’ã„ã˜ã£ã¦ã‚‹ã‚“ã ã‹ã‚‰ fail ã«ãªã‚‹ã¯ãšãªã‚“ã ãŒã€‚Subject ã‚’ã„ã˜ã‚‰ãªã„ãƒ¡ãƒ¼ãƒªãƒ³ã‚°ãƒªã‚¹ãƒˆã¨ã‹ã€ã„ã˜ã£
mogwaing 2008/01/21
shebang

unix

env
ãƒªãƒ³ã‚¯
https://labs.cybozu.co.jp/blog/kazuho/archives/2007/09/syscall_optimization.php
mogwaing 2007/09/22
unix

benchmark
ãƒªãƒ³ã‚¯
Cè¨€èªž: UNIXæœ€é€Ÿãƒ•ã‚¡ã‚¤ãƒ«ã‚³ãƒ”ãƒ¼
Created: Kazuki Ohta, 2006/06/14 Last Update: Kazuki Ohta, 2006/06/14 ã€Œwrite(2)ã®æ£ã—ã„ä½¿ã„æ–¹ã€ã¨åŒã˜ãã€OSæ¼”ç¿’ã§ã‚„ã£ãŸäº‹ã®å»¶é•·ç·šã®è¨˜äº‹ã‚’æ›¸ã„ã¦ã¿ã‚‹ã€‚ãŠé¡Œã¯ã€ŒUNIXä¸Šã§å¤§è¦æ¨¡ãƒ•ã‚¡ã‚¤ãƒ«ã‚’æœ€é€Ÿã§ã‚³ãƒ”ãƒ¼ã™ã‚‹æ–¹æ³•ã€ã ã€‚ä¸€èˆ¬çš„ã«ã€UNIXã§ãƒ•ã‚¡ã‚¤ãƒ«ã‚’copyã™ã‚‹éš›ã«ã¯ä»¥ä¸‹ã®ã‚ˆã†ãªæ–¹æ³•ãŒæœ‰ã‚‹ã€‚ read -> write read -> write with posix_fadvice mmap -> mmap -> memcpy -> fsync mmap -> mmap -> memcpy -> fsync with madvise mmap -> write mmap -> write with madvise read, write, mmapè¾ºã‚Šã¯è‰¯ã„ã¨ã—ã¦ã€posix_fadviseã¨ã„ã†ã‚·ã‚¹ãƒ†ãƒ ã‚³ãƒ¼ãƒ«ãŒæœ‰
mogwaing 2007/07/30
ãƒ•ã‚¡ã‚¤ãƒ«ã‚³ãƒ”ãƒ¼ã®è‰²ã€…ãªæ–¹æ³•

c

unix

mmap
ãƒªãƒ³ã‚¯
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mogwaing 2007/07/29
unix

nscd
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mogwaing 2007/05/24
unix

dankogai
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mogwaing 2007/04/13
daemon

unix
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mogwaing 2007/03/06
unix

permission
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mogwaing 2006/10/08
wait

sigchld

signal

unix
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mogwaing 2006/10/03
sianal

unix

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