[B! Unix] yyamanoã®ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯

yyamano id:yyamano

Unixã«é–¢ã™ã‚‹yyamanoã®ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯ (127)

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Unix System Call Timeouts
Recently I was writing some code where I wanted to wait for a child process, and I wanted the wait call to have a timeout. The use case is something like this: you spawn a subprocess, and you expect the subprocess to complete within ten seconds. If it doesn't complete in that time, you want to treat it as an error (and perhaps kill the child). There are a lot of "wait" system calls on Linux. In se
yyamano 2017/03/13
Unix
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The Collapse of the UNIX Philosophy
In the first part of the article, I will enumerate lots of UNIX cheap and dirty hacks, and other various drawbacks. In the second part, weâ€™ll talk about the UNIX philosophy. This article was written hastily, and I donâ€™t want to further improve it. Youâ€™re lucky I wrote it. Therefore, I may provide some facts without source links. Dirty hacks in UNIX started to arise when UNIX was released, and it w
yyamano 2017/03/03
Unix
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A Repository of Unix History and Evolution
yyamano 2016/12/02
Unix

Computer History
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ã“ã‚“ã«ã¡ã¯ã€SPARCãŠå§‰ã•ã‚“é•·å³¶ã§ã™ã€‚ ã¿ãªã•ã‚“ã¯ã€Œã™ã±ãƒ¼ãã€ã¨ã„ã†éŸ³ã‚’èžã„ã¦ã€ä½•ã‚’ã‚¤ãƒ¡ãƒ¼ã‚¸ã•ã‚Œã¾ã™ã‹ï¼Ÿ ä»Šæ—¥ã¯ç§ãŒçŸ¥ã£ã¦ã„ã‚‹ã€Œã™ã±ãƒ¼ãã€ã‚’ã”ç´¹ä»‹ã—ã¦ã„ãã¾ã™:-) â– ãŠã‚‚ã—ã‚ã„ã»ã©ã‚ˆãè½ã¡ã‚‹ã€Œã‚¹ãƒ‘ãƒ¼ã‚¯ã€ ä¸€å®šã®å¹´ä»£ä»¥ä¸Šã®æ–¹ã¯ã€ã‚ˆãã”å˜ã˜ã®ã€Œã‚¹ãƒ‘ãƒ¼ã‚¯ã€ã€‚ ã“ã®ã‚¹ãƒ‘ãƒ¼ã‚¯ã¯æ´—æ¿¯ç”¨æ´—å‰¤ã®ã“ã¨ã§ã€1990å¹´ä»£ã«ãƒ©ã‚¤ã‚ªãƒ³ã‹ã‚‰è²©å£²ã•ã‚Œã¦ã„ãŸãƒ¢ãƒŽã§ã™ã€‚å½“æ™‚ã€çŸ³æ²¹è³‡æºã®çœè³‡æºåŒ–ã¸å¯¾å¿œã™ã‚‹ãŸã‚ã«ã€æ¤ç‰©åŽŸæ–™ã®æ´—å‰¤ã¨ã—ã¦ç™»å ´ã—ãŸã®ãŒã€ã“ã®ã‚¹ãƒ‘ãƒ¼ã‚¯ã§ã—ãŸã€‚ ã‚ãƒ£ãƒƒãƒã‚³ãƒ”ãƒ¼ã¯ã€Œå¤©ç„¶ã®åº•åŠ›ã§ãŠã‚‚ã—ã‚ã„ã»ã©ã‚ˆãè½ã¡ã‚‹ã€ã ãã†ã§ã™ã€‚å½“æ™‚ã®CMã«ã¯éƒæµã¡ã‚ƒã‚“ãŒç™»å ´ã—ã¦ã„ã¾ã™ã€‚ â– ä¸‰ä»£ç›® J Soul Brothers ã®ã€ŒSPARKã€ EXCILEã®å¼Ÿåˆ†çš„å˜åœ¨ã§ã€ä»Šã‚„æ—¥æœ¬ã‚’ä»£è¡¨ã™ã‚‹ãƒ€ãƒ³ã‚¹ãƒ¦ãƒ‹ãƒƒãƒˆã®1ã¤ã€ã€Œä¸‰ä»£ç›® J Soul Brothersã€ãŒ2013å¹´ã«ãƒªãƒªãƒ¼ã‚¹ã—ãŸæ›²ã«ã€ŒSPARKã€ãŒã‚ã‚Šã¾ã™ã€‚ ã‚½ãƒ¼ã‚·ãƒ£ãƒ«ãƒ¡ãƒ‡ã‚£ã‚¢
yyamano 2015/10/22
â€œHP9000ã¨ã„ã†UNIXã‚µãƒ¼ãƒãŒè²©å£²ã•ã‚Œã¦ã„ãŸã®ã§ã™ãŒã€ãƒ‰ã‚¤ãƒ„ã§ã¯åŒã˜ã€ŒHP9000ã€ã¨ã„ã†æ´—å‰¤ãŒè²©å£²ã•ã‚Œã¦ã„ãŸãã†ã§ã™ã€‚â€

Unix
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WhyTheName - Debian Wiki
An IT-etymology/linux guistics page for people wondering "how come the package yasysmand-cling has such a strange name?" Giving cryptic names to software is a well-established UNIX tradition, and the explanations are often missing from the documentation, either because the developers imagine it's obvious (usually wrongly) or because they think nobody cares (and here they're usually right, or it wou
yyamano 2015/04/08
Unix
ãƒªãƒ³ã‚¯
Pipecut Project Home
yyamano 2015/03/11
â€œPipecut tries to facilitate the development of pipelines by letting you see your data and your shell commands at the same time, eliminating the back and forth editing cycle of entering and quitting more(or less), then recalling and editing the command line. Since pipecut has an AST view of the Un

Unix
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ã‚·ã‚§ãƒ«ã‚¹ã‚¯ãƒªãƒ—ãƒˆã®ä¸ã§1è¡Œãšã¤å¤‰æ•°ã‚’åˆ†å‰²ã™ã‚‹éš›ã«ã¯ã€cutã¨ã‹awkã¨ã‹ä½™è¨ˆãªãƒ—ãƒã‚»ã‚¹ã‚’èµ·å‹•ã›ãšsetã‚’ä½¿ã£ã¦åˆ†å‰²ã—ãŸæ–¹ãŒåŠ¹çŽ‡çš„ - åŒå…å·¥å ´æ—¥èªŒ
ã‚·ã‚§ãƒ«ã‚¹ã‚¯ãƒªãƒ—ãƒˆã®ä¸ã§ã€ã‚¹ãƒšãƒ¼ã‚¹åŒºåˆ‡ã‚Šã‚‚ã—ãã¯ã‚¿ãƒ–åŒºåˆ‡ã‚Šã®ãƒ¬ã‚³ãƒ¼ãƒ‰ã‚’æ‰±ã†ã“ã¨ãŒã‚ˆãã‚ã‚‹ã¨æ€ã„ã¾ã™ã€‚ ãŸã¨ãˆã°ã€å‰å›žã®ã‚¨ãƒ³ãƒˆãƒªã€ŒAWS CLIã¨jqã‚’ä½¿ã£ã¦ã€AWSã®ELBãƒœãƒªãƒ¥ãƒ¼ãƒ ãŒã‚¢ã‚¿ãƒƒãƒã•ã‚Œã¦ã„ã‚‹EC2ã‚¤ãƒ³ã‚¹ã‚¿ãƒ³ã‚¹åã‚’å‡ºåŠ›ã™ã‚‹ãƒ¯ãƒ³ãƒ©ã‚¤ãƒŠãƒ¼ã‚’æ›¸ã„ãŸ - åŒå…å·¥å ´æ—¥èªŒã€ã®ã‚¹ã‚¯ãƒªãƒ—ãƒˆã®å‡ºåŠ›ã¯ä»¥ä¸‹ã®ã‚ˆã†ã«ãªã‚Šã¾ã™ã€‚ i-ec56a9f5 vol-07d00601 servername i-ec56a9f5 vol-8f550991 servername ã“ã®ã‚ˆã†ãªãƒ¬ã‚³ãƒ¼ãƒ‰ã®ç‰¹å®šã®åˆ—ã‚’å–ã‚Šå‡ºã—ã¦ã€å‡¦ç†ã™ã‚‹éš›ã«ã©ã†ã™ã‚‹ã®ãŒåŠ¹çŽ‡çš„ã‹ã€ã¨ã„ã†ã®ãŒã“ã®ã‚¨ãƒ³ãƒˆãƒªã®ãŠé¡Œã§ã™ã€‚ éžå¸¸ã«å¤ã„è©±é¡Œãªã®ã§ã€æ˜”ã‹ã‚‰ã‚·ã‚§ãƒ«ã‚¹ã‚¯ãƒªãƒ—ãƒˆã‚’æ›¸ã„ã¦ã„ã‚‹äººã«ã¯è‡ªæ˜Žãªè©±ã§ã¯ã‚ã‚Šã¾ã™ãŒã€æœ€è¿‘ã€ã‚·ã‚§ãƒ«ã®æ¨™æº–æ©Ÿèƒ½ã®è©±ã‚’èžãæ©Ÿä¼šãŒãªãã€å¤±ã‚ã‚Œã¤ã¤ã‚ã‚‹æŠ€è¡“ã«ãªã£ã¦ãã¦ã„ã‚‹æ°—ãŒã—ã¦ã„ã‚‹ã®ã§ã€æ”¹ã‚ã¦ç¢ºèªã¨ã„ã†ã“ã¨ã§ã€‚ ä¾‹ã¨ã—ã¦æŒ™ã’ãŸãƒ¬ã‚³ãƒ¼ãƒ‰ã‹ã‚‰
yyamano 2015/02/16
Unix
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å¤ªé˜³é›†å›¢åŸŽç½‘ç«™2017(ä¸å›½)å®˜æ–¹ç½‘ç«™
yyamano 2015/01/19
â€œThe UNIX or Unix trademark hasn't been ours for a long time now, of course. See http://www.opengroup.org/trademarks.htm and so we can do pretty much as we please (except in Bell Labs journals, which still care). Open Group, though, still prefers all-caps.â€

Unix

Computer History
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2014-09-03 (Wed)#1ãµã¨ openSUSE 13.1 ã‚’ install ã—ã¦ã¿ãŸã€‚lsb_release ã® Description ã¨ /etc/os-release ã® PRETTY_NAME ã¯ä¸€è‡´ã—ã¦ã„ã‚‹ã‚ˆã†ã ã€‚ % lsb_release -a LSB Version: n/a Distributor ID: openSUSE project Description: openSUSE 13.1 (Bottle) (x86_64) Release: 13.1 Codename: Bottle % cat /etc/os-release NAME=openSUSE VERSION="13.1 (Bottle)" VERSION_ID="13.1" PRETTY_NAME="openSUSE 13.1 (Bottle) (x86_64)" ID=opensuse A
yyamano 2015/01/19
vfork

Unix
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Justin Cormack on Twitter: "Unix commands turned into companies by @goodmachine at @thingmonk http://t.co/9ENWpr9amx"
Unix commands turned into companies by @goodmachine at @thingmonk http://t.co/9ENWpr9amx
yyamano 2014/12/04
X as a Service

Unix

funny
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https://minnie.tuhs.org/cgi-bin/utree.pl?file=V7/usr/src/cmd/sh/mac.h
yyamano 2014/11/07
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Unix
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putenv() and setenv()
yyamano 2014/07/15
Unix
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Unix C - Portable WEXITSTATUS
I'm trying to get the exit code of a subprocess. On Linux and FreeBSD I can go like so: [0] [ishpeck@kiyoshi /tmp]$ uname FreeBSD [0] [ishpeck@kiyoshi /tmp]$ cat tinker.c #include <stdio.h> #include <sys/wait.h> int main(void) { FILE *proc = popen("ls", "r"); printf("Exit code: %d\n", WEXITSTATUS(pclose(proc))); return 0; } [0] [ishpeck@kiyoshi /tmp]$ gcc tinker.c -o tinker [0] [ishpeck@kiyoshi /t
yyamano 2014/06/04
Unix
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GitHub - dspinellis/unix-history-repo: Continuous Unix commit history from 1970 until today
The history and evolution of the Unix operating system is made available as a revision management repository, covering the period from its inception in 1970 as a 2.5 thousand line kernel and 26 commands, to 2018 as a widely-used 30 million line system. The 1.5GB repository contains about half a million commits and more than two thousand merges. The repository employs Git system for its storage and
yyamano 2014/06/03
â€œA git repository representing the Unix source code historyâ€

Unix
ãƒªãƒ³ã‚¯
grep, awk, sed ã§ãƒãƒƒãƒ•ã‚¡ã—ãªã„æ–¹æ³• | TECHSCORE BLOG | TECHSCORE BLOG
ã“ã‚“ã«ã¡ã¯ã€TechscoreBlogã®ãƒã‚°é–²è¦§ãŒæ—¥èª²ã«ãªã£ã¦ã„ã‚‹æ²³é‡Žã§ã™ã€‚ ãƒã‚°ã‚’tailã§ãƒªã‚¢ãƒ«ã‚¿ã‚¤ãƒ ã«è¦‹ã¦ã„ã‚‹ã¨ãã«ã€grep, awk, sedã¨çµ„ã¿åˆã‚ã›ã‚‹ã“ã¨ãŒã‚ã‚Šã¾ã™ã€‚ã¨ã“ã‚ãŒã€ç‰¹ã«ã‚ªãƒ—ã‚·ãƒ§ãƒ³ã‚’æŒ‡å®šã—ãªã„ã¨ã€å„ã‚³ãƒžãƒ³ãƒ‰ã§ãƒãƒƒãƒ•ã‚¡ã•ã‚Œã¦ã—ã¾ã†ã®ã§ã€ãƒã‚°ã®è¡¨ç¤ºãŒé…å»¶ã™ã‚‹ã“ã¨ãŒã‚ã‚Šã¾ã™ã€‚å˜ã«ã‚¢ã‚¯ã‚»ã‚¹çŠ¶æ³ã‚’çœºã‚ã¦ã„ã‚‹ã ã‘ãªã‚‰å•é¡Œã‚ã‚Šã¾ã›ã‚“ãŒã€ãƒãƒ¥ãƒ¼ãƒ‹ãƒ³ã‚°ã—ã¦ã‚‹æ™‚ã¨ã‹æ°—ã«ãªã‚Šã¾ã™ã‚ˆãã€‚ ãã‚“ãªã‚ã‘ã§ã€ä»Šå›žã¯ãƒãƒƒãƒ•ã‚¡ã•ã›ãªã„æ–¹æ³•ã‚’ç´¹ä»‹ã—ã¾ã™ã€‚ grep : --line-buffered grepã§ã®ã‚ªãƒ—ã‚·ãƒ§ãƒ³ã§ã™ã€‚æ£ç¢ºã«ã¯ãƒãƒƒãƒ•ã‚¡ã•ã›ãªã„ã®ã§ã¯ãªãã¦ã€1è¡Œæ¯Žã«å‡ºåŠ›ã™ã‚‹ã¨ã„ã†ã‚ªãƒ—ã‚·ãƒ§ãƒ³ã§ã™ã€‚ tail -f logfile | grep --line-buffered -vE '\.(css|js|ico|png|gif|jpe?g)'
yyamano 2014/05/28
GNUç³»ãªã‚‰grep : --line-bufferedã€awk : fflushã€sed : --unbuffered, -uã€‚netbsdã®grepã¯GNUã®ã‚‚ã®ã€sedã¯ãƒãƒƒãƒ•ã‚¡ãƒªãƒ³ã‚°ã«é–¢ã™ã‚‹ã‚ªãƒ—ã‚·ãƒ§ãƒ³ãªã—ã€awkã¯fflushã‚µãƒãƒ¼ãƒˆã€‚mac os xã€freebsdã®sedã¯-lã§ãƒ©ã‚¤ãƒ³ãƒãƒƒãƒ•ã‚¡ã€‚

Unix
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How to stop sed from buffering?
yyamano 2014/05/28
â€œI think I found it. For some reason, grep doesn't automatically do line buffering. I added a --line-buffered option to grep and now it responds immediately.â€

Unix
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ãƒ‡ãƒ¼ãƒ¢ãƒ³ãƒ—ãƒã‚»ã‚¹ã‚’ä½œã‚‹å ´åˆã«ã¯ï¼Œæ•™ç§‘æ›¸ã«ã‚ˆãæ›¸ã‹ã‚Œã¦ã„ã‚‹2åº¦forkã¯ä¸è¦ã§ã¯ãªã„ã‹? ã¨ã„ã†ã“ã¨ã‚’ä»¥å‰ã®è¨˜äº‹ã«æ›¸ã„ãŸï¼Ž [c][unix]UNIXãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯ãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚°ã®ãŠå‹‰å¼· (2) ãƒ‡ãƒ¼ãƒ¢ãƒ³ã®ä½œã‚Šæ–¹ - ç¡çœ ä¸è¶³ï¼Ÿï¼ ç¢ºã‹ã«BSDã®daemon(3) ã®ã‚³ãƒ¼ãƒ‰ã§ã¯ï¼Œforkã¯1å›žã—ã‹å‘¼ã‚“ã§ã„ãªã„ï¼Ž ã€Œãã£ã¨ãƒ—ãƒ¬ã‚»ã‚¹ãŒã‚»ãƒƒã‚·ãƒ§ãƒ³ãƒªãƒ¼ãƒ€ã ã¨ä¸éƒ½åˆãŒã‚ã‚‹ã®ã ã‚ã†ï¼Žã§ã‚‚ãªãœ?ã€ ã¨ã„ã†ã®ãŒopen questionã ã£ãŸï¼Ž ãã‚Œã«å¯¾ã™ã‚‹ç”ãˆã‚’ã€Œè©³è§£UNIXãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚°ã€[1] ã«è¦‹ã¤ã‘ãŸï¼Ž SVR4ã«ãŠã„ã¦ã¯ï¼Œã“ã®æ™‚ç‚¹ã§forkã‚’å†åº¦å‘¼ã³ï¼Œè¦ªã‚’çµ‚äº†ã™ã‚‹ã“ã¨ã‚’å‹§ã‚ã‚‹äººãŒã„ã‚‹ï¼Ž 2ç•ªç›®ã®åãŒãƒ‡ãƒ¼ãƒ¢ãƒ³ã¨ã—ã¦å‹•ä½œã™ã‚‹ï¼Žã“ã‚Œã¯ï¼Œãƒ‡ãƒ¼ãƒ¢ãƒ³ã¯ã‚»ãƒƒã‚·ãƒ§ãƒ³ãƒªãƒ¼ãƒ€ã§ã¯ãªãï¼Œ SVR4ã®è¦å‰‡ (9.6ç¯€) ã‹ã‚‰ï¼Œã‚»ãƒƒã‚·ãƒ§ãƒ³ãƒªãƒ¼ãƒ€ã§ãªã‘ã‚Œã°åˆ¶å¾¡ç«¯æœ«ã‚’å–å¾—ã§ããªã„ï¼Œã¨ã„ã†ã“ã¨ã‚’ä¿è¨¼ã™ã‚‹ï¼Ž ã‚ã‚‹ã„ã¯ï¼Œåˆ¶å¾¡ç«¯æœ«ã‚’å–
yyamano 2014/05/20
Unix
ãƒªãƒ³ã‚¯
http://pdos.csail.mit.edu/6.828/2004/readings/ritchie74unix.pdf
yyamano 2014/04/30
"The UNIX Time-Sharing System" by Dennis M. Ritchie and Ken Thompson, 1974

Unix
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bashã®ãƒ—ãƒã‚»ã‚¹ç½®æ›æ©Ÿèƒ½ã‚’æ´»ç”¨ã—ã¦ã€ã‚·ã‚§ãƒ«ä½œæ¥ã‚„ã‚¹ã‚¯ãƒªãƒ—ãƒˆæ›¸ãã‚’åŠ¹çŽ‡åŒ–ã™ã‚‹ - åŒå…å·¥å ´æ—¥èªŒ
@hirose31 ã•ã‚“ãŒã€Œã‚·ã‚§ãƒ«ã‚¹ã‚¯ãƒªãƒ—ãƒˆã§ãƒãƒžã£ãŸä»¶â†’ã€å‹Ÿã€‘ã‚¹ãƒ†ã‚ãªå›žé¿æ–¹æ³•ã€ã§ãŠé¡Œã‚’å‡ºã•ã‚Œã¦ã„ã¦ã€ãã‚Œã«å›žç”ã—ã¦ã¿ã¾ã—ãŸã€‚ ãã®å†…å®¹ã¯ãƒªãƒ³ã‚¯å…ˆã‚’è¦‹ã¦ã‚‚ã‚‰ã†ã¨ã—ã¦ã€å›žç”ã®ä¸ã§ä½¿ã£ãŸbashã®ãƒ—ãƒã‚»ã‚¹ç½®æ›ã«ã¤ã„ã¦æ›¸ã‹ã‚ŒãŸè¨˜äº‹ã‚’ã‚ã¾ã‚Šè¦‹ãªã„ã®ã§ã€å›žç”ã§ä½¿ã£ãŸãƒ—ãƒã‚»ã‚¹ç½®æ›ã®ã“ã¨ã‚’ã‚¨ãƒ³ãƒˆãƒªã«ã—ã¦ã¿ãŸã„ã¨æ€ã„ã¾ã™ã€‚ æœ€åˆã«æ³¨æ„ç‚¹ã§ã™ãŒã€ãƒ—ãƒã‚»ã‚¹ç½®æ›ã®æ©Ÿèƒ½ã¯ã€bashã‚„zsh*1ã®æ©Ÿèƒ½ã§POSIXäº’æ›ã®æ©Ÿèƒ½ã§ã¯ã‚ã‚Šã¾ã›ã‚“ã€‚ãã®ãŸã‚ã€ä½¿ç”¨æ™‚ã«ã¯ã€å¯¾å¿œã—ã¦ã„ãªã„ã‚·ã‚§ãƒ«ã§ã¯ä½¿ãˆã¾ã›ã‚“ã—ã€bashã§ä½¿ã†å ´åˆã‚‚ /bin/sh ã§ã¯ãªã /bin/bash ã‚’æ˜Žç¤ºçš„ã«æŒ‡å®šã™ã‚‹å¿…è¦ãŒã‚ã‚Šã¾ã™ã€‚ãŸã¨ãˆã°ã€ãƒ—ãƒã‚»ã‚¹ç½®æ›ã‚’ä½¿ã£ãŸã‚¹ã‚¯ãƒªãƒ—ãƒˆã€Œscript.shã€ã«å¯¾ã—ã¦"$ bash script.sh" ã¨ã„ã†ã‚³ãƒžãƒ³ãƒ‰ã¯æˆåŠŸã—ã¾ã™ãŒã€"$ sh script.sh" ã¨ã„ã†ã‚³ãƒžãƒ³ãƒ‰ã¯å¤±æ•—ã—ã¾ã™ã€‚ã“ã®è¾ºã‚Šã®é•ã„ã¯ã€Œ/
yyamano 2014/04/25
Unix
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