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Volker Armin Hemmann ha scritto: |
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> there are many shells. sh, bash, bsh. korn, csh, zsh, dash, tcsh, .... why |
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> make a new one, if you can do incredible stuff with zsh? A shell is not so |
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> easy to create. |
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I understand. I wondered if *conceptually new* shells were |
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present.That's why I thought about the Powershell, as an example. |
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> A new kernel is not so hard to do. The problem are the drivers - and all the |
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> quirks. It is one thing to write a little task scheduler for your little pet |
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> project, but if it crashs constantly it becomes a bitch to fight through all |
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> the errata. But at the beginning a simple kernel is much easier to do than |
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> stuff that runs on it (simple is the important work. A non-simple kernel is |
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> very hard). |
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Well, I've never done kernel programming, but I have always been under |
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the impression it is among the hardest programming stuff you can do, |
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even if only for the hardware knowledge and debugging troubles it gives... |
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> Another thing are libcs. A libc is a bitch. Luckily there is a whole bunch to |
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> choose from. glibc, bsd's libc, uclibc, dietlibc, ... so why re-invent the |
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> wheel? |
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For libc, yes, I agree. |
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> Or look at X. X is horrible. A convoluted mess of grown cruft and standards |
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> to hold the pile together. But where is the replacement? Fiasco/Berlin? |
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> failed. Y-window? failed. Because X works good enough. And if you aren't |
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> writing toolkits or apps using xlib directly, you don't need to care about |
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> most of the stuff. |
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> |
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> So hobbyist concentrate on the easy stuff - and a userland is not easy. |
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> |
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> Userland is not boring - it is very hard. And the best userland doesn't help |
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> you if no 3rd party software runs on it. |
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But projects like Haiku and ReactOS created also most of userland from |
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scratch, not only the kernels. They had the advantage of taking |
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inspiration from existing OSes but they actually did the implementation. |
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Also, SkyOS or Syllable did it, AFAIK. |
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So I can rephrase my question as those two: |
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Why didn't those projects use the Linux kernel? |
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Are there similar projects using the Linux kernel? |
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|
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m. |
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