{"id":18917,"date":"2013-12-05T19:48:08","date_gmt":"2013-12-05T17:48:08","guid":{"rendered":"https:\/\/mamchenkov.net\/wordpress\/?p=18917"},"modified":"2013-12-05T19:49:48","modified_gmt":"2013-12-05T17:49:48","slug":"how-many-lines-of-code-have-survived-to-the-current-day-from-the-original-linux-kernel","status":"publish","type":"post","link":"https:\/\/mamchenkov.net\/wordpress\/2013\/12\/05\/how-many-lines-of-code-have-survived-to-the-current-day-from-the-original-linux-kernel\/","title":{"rendered":"How many lines of code have survived to the current day from the original Linux kernel"},"content":{"rendered":"\n

Here is a excellent Quora question: how many lines of code, if any, from Linux 1.0 are still in the modern Linux kernel, and what is it?<\/a> \u00a0And an evenly excellent answer:<\/p>\n

According to git diff<\/em>, 21228 of the 176250 lines from Linux 1.0 (1994-03-14) are still present in Linux 3.12 (2013-11-03):<\/p>\n

\r\n$ empty_tree="$(git mktree &lt; \/dev\/null)"\r\n$ git diff --shortstat "$empty_tree" 1.0\r\n561 files changed, 176250 insertions(+)\r\n$ git diff --shortstat -M -l99999 1.0 v3.12\r\n44905 files changed, 17702349 insertions(+), 155022 deletions(-)\r\n<\/pre>\n
Over half of these lines are blank or consist entirely of punctuation; only 10419 of them have at least one letter or number.<\/p>\n
We can go back even farther to the very first public release, Linux 0.01 (1991-09-17). Of the 10239 lines in Linux 0.01, 954 survive in Linux 3.12, of which just 242 have at least one letter or number. 123 of them were structs and constants in include\/a.out.h (now include\/uapi\/linux\/a.out.h), and 26 of them were the S_*<\/em> macros in include\/sys\/stat.h (now include\/uapi\/linux\/stat.h). The rest were scattered through 24 other files with at most 9 lines each.<\/p><\/blockquote>\n
It might appear that not much. \u00a0 But it is in fact impressive. \u00a0How much code have you written that survived for over 20 years in a project that has changed so much – from a hobby experiment to a dominant operating system across servers, mobiles, and embedded devices?<\/p>\n\n","protected":false},"excerpt":{"rendered":"\n
Here is a excellent Quora question: how many lines of code, if any, from Linux 1.0 are still in the modern Linux kernel, and what is it? \u00a0And an evenly excellent answer: According to git diff, 21228 of the 176250 lines from Linux 1.0 (1994-03-14) are still present in Linux 3.12 (2013-11-03): $ empty_tree="$(git mktree … Continue reading How many lines of code have survived to the current day from the original Linux kernel<\/span><\/a><\/p>\n\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"_links_to":"","_links_to_target":""},"categories":[1,6,18,133,62],"tags":[286,1531,1588],"keyring_services":[],"class_list":["post-18917","post","type-post","status-publish","format-standard","hentry","category-general","category-linux","category-programming","category-sysadmin","category-technology","tag-history","tag-operating-systems","tag-version-control"],"aioseo_notices":[],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack-related-posts":[{"id":28827,"url":"https:\/\/mamchenkov.net\/wordpress\/2018\/09\/30\/highlights-from-git-2-19-and-php-syntax\/","url_meta":{"origin":18917,"position":0},"title":"Highlights from Git 2.19 and PHP syntax","author":"Leonid Mamchenkov","date":"September 30, 2018","format":false,"excerpt":"GitHub blog covers the highlights from Git 2.19, which was recently released. 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