ときどきの雑記帖 RE* (新南口)

Binary Star

4Kg

某スーパーで米がちょっと安かったので ほうと近寄ってよく確かめてみたら 5Kg入りの袋ではなく4Kg入りの袋だった というオチ。

いつもは5Kg入りのものが積まれていた棚だったのよね

Gemini

Geminiによるフィギュア再配置。 - Manualmaton’s Laboratory

なるほどこういう使い方が。

21st century C++

Interview: Bjarne Stroustrup on 21st century C++, AI risks, and why the language is hard to replace • DEVCLASS

配信

【公式】「MASTERキートン」第１話『迷宮の男 / A MAN IN LABYRINTH』期間限定本編配信 - YouTube

配信するのは3話までっぽい。

Firefox

firefoxのソースコード管理がgithubに

They made the decision to move from hg.mozilla.org to GitHub last year. They are in the final legs of that migration.

Multiple security issues in GNU Screen

strncpy

Multiple CVEs in GNU Screen: Local Root Exploit and TTY Hijacking Discovered https://securityonline.info/multiple-cves-in-gnu-screen-local-root-exploit-and-tty-hijacking-discovered/

Buffer Overflow Due to Misuse of strncpy()

While not assigned a CVE, a non-exploitable buffer overflow in Screen 5.0.0 could lead to crashes when users attempt to send commands to an active Screen session with multiple arguments. The bug stems from an improper replacement of strcpy() with strncpy().

This has been observed in Arch Linux, where the application crashes with FORTIFY_SOURCE protections enabled.

improper replacement とは? と思ったのだけどこういうことらしい

3.f) Bad strncpy() Use Leads to Crashes when Sending Commands

   for (; *av && n < MAXARGS - 1; ++av, ++n) {
           size_t len;
           len = strlen(*av) + 1;
           if (p + len >= m.m.command.cmd + ARRAY_SIZE(m.m.command.cmd) - 1)
                   break;
           strncpy(p, *av, MAXPATHLEN);
           p += len;
   }

ああ、そういう…

fix bad strncpy() which can lead to a buffer overflow - screen.git

swift 6.2

前回、プログラミング言語の識別子に空白が云々という話を書いたら こんな話題が流れてきた。 また西亭新九郎が暗躍?

What’s new in Swift 6.2? – Hacking with Swift

Raw identifiers

So, this kind of code is legal in Swift 6.2 and later:

 func `function name with spaces`() {
     print("Hello, world!")
 }

 `function name with spaces`()

What’s new in Swift 6.2? : r/programming

misc

MIDA

今一つ「からくり」がわからん😓

MIDA: For those brave souls still writing C in 2025 who are tired of passing array lengths everywhere : r/programming

// For C89 holdouts (respect for maintaining 35-year-old code)

VB

The History and Legacy of Visual Basic | Hacker News

How Visual Basic became the world’s most dominant programming environment, its sudden fall from grace, and why its influence is still shaping the future of software development.

The History and Legacy of Visual Basic | Hacker News

Hi! I was the lead developer for Ruby (no relation to the programming language), which became the “visual” side of Visual Basic.

Dusk OS C Compiler

Forthで書かれたCコンパイラー?

The C compiler is a central piece of Dusk OS. It’s written in Forth and is loaded very early in the boot process so that it can compile the drivers it’s about to use.

FORTRAN Compiler on IBM 704

FORTRAN I, II, and 709

p.34

Notice that several CIT’s are stored on tape during the run of the executive routine. There is only one standard four-word format for CIT’s:

Decrement Address
Word 1 (IFN) Internal formula No. Instruction number within formula number
Word 2 Operation code of Instr. in SAP mnemonic Decrement of Type A instruction
Word 3 Symbolic address (BCD) assigned by executive routine
Word 4 * Symbolic tag
  • Decrement of Word 4:
    Fortran I - The subscript, if any, of the symbolic address.
    Fortran I1 and 709 - Relative absolute part of address of the instruction; for example, in CLA N + 3 The + 3 would be entered into this field.

Hugoメモ

五芒星

アイコンがノイエ銀英伝での同盟の五芒星になんとなく似ているような

登場人物≪自由惑星同盟≫｜アニメ「銀河英雄伝説 Die Neue These」公式サイト

Z

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