Have 10mins to deepen your understanding of #Unix like systems?
Check the utistd.h page. This is the header file that provides access to the POSIX operating system API. Even a quick browse can show you how your program talks with your OS.
https://en.wikipedia.org/wiki/Unistd.h
For example whenever your program needs a higher privilege (or to act as another user), it calls `setuid` for that. Or starts with `sudo/doas` to have a higher access but calls `setuid` to become "nobody" in most of its life cycle.
If still have a click to spare, check the setuid.h on #OpenBSD man pages:
https://man.openbsd.org/setuid.2
in most cases OpenBSD man pages are the best references you need to understand the OS.
#BSD #Linux
Jadi
npub1c2…upw98
2024-05-08 06:56:27
Author Public Key
npub1c29weetz4uk46vl8ja6a98lxqfsz8e27vsdlcqlp8zeqvmkezyaqlupw98Published at
2024-05-08 06:56:27Event JSON
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"content": "Have 10mins to deepen your understanding of #Unix like systems? \n\nCheck the utistd.h page. This is the header file that provides access to the POSIX operating system API. Even a quick browse can show you how your program talks with your OS. \n\nhttps://en.wikipedia.org/wiki/Unistd.h\n\nFor example whenever your program needs a higher privilege (or to act as another user), it calls `setuid` for that. Or starts with `sudo/doas` to have a higher access but calls `setuid` to become \"nobody\" in most of its life cycle.\n\nIf still have a click to spare, check the setuid.h on #OpenBSD man pages:\n\nhttps://man.openbsd.org/setuid.2\n\nin most cases OpenBSD man pages are the best references you need to understand the OS. \n#BSD #Linux ",
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