75673cd8ae
These are wrappers around getpwuid_r() and friends, and will allocate the right-sized buffer for this call. We so far had multiple implementations of a buffer allocation loop around getpwuid_r() and friends, and they all suck in some way. Let's clean this up and add a common implementation, and use it everywhere. Also, be more careful with error numbers, in particular systematically turn ENOENT into ENOSRCH (the former is what is returned if /etc/passwd is absent, which we want to consider identical to user not existing, which is ENOSRCH). We so far did this at some invocations, but not all. There are some invocations of getpwuid() left in the codebase. We really should fix those too, and have a single unified implementation of the logic, but those are not as trivial to convert, so left for another time.
System and Service Manager
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