Switch from obsolete utmp interface to utmpx #213
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Android NDK 25b has utmp.h but not utmpx.h. Switching API would break building these on android. |
yeah, while i'm always skeptical of "obsolete", and even more skeptical of anything being removed, a more persuasive version of this would have been "Switch from legacy utmp interface to POSIX utmpx". and since these are all no-ops on Android anyway, I can actually fix this for you in a header-file-only backwards-compatible way. amusingly, portability.h is already using https://android-review.googlesource.com/c/platform/bionic/+/2521475 (if you want to make this change, you'll still need a newer NDK, of course. but toybox binaries built by it will run on any existing version of Android.) |
Now <utmpx.h> isn't any more useful on Android than <utmp.h> is, but it is POSIX, and -- importantly -- we can implement it with just a header file, so code can use it on every existing API level. macOS does indeed only have the <utmpx.h> functions (although it does still have the <utmp.h> header!), so potentially portable code might want <utmpx.h> on Android. (glibc/musl both have both headers.) Bug: landley/toybox#213 Test: treehugger Change-Id: Iaa88167708182009a63e2e1a15f11186b251ed02
Now <utmpx.h> isn't any more useful on Android than <utmp.h> is, but it is POSIX, and -- importantly -- we can implement it with just a header file, so code can use it on every existing API level. macOS does indeed only have the <utmpx.h> functions (although it does still have the <utmp.h> header!), so potentially portable code might want <utmpx.h> on Android. (glibc/musl both have both headers.) Bug: landley/toybox#213 Test: treehugger Change-Id: Iaa88167708182009a63e2e1a15f11186b251ed02
Now <utmpx.h> isn't any more useful on Android than <utmp.h> is, but it is POSIX, and -- importantly -- we can implement it with just a header file, so code can use it on every existing API level. macOS does indeed only have the <utmpx.h> functions (although it does still have the <utmp.h> header!), so potentially portable code might want <utmpx.h> on Android. (glibc/musl both have both headers.) Bug: landley/toybox#213 Test: treehugger Change-Id: Iaa88167708182009a63e2e1a15f11186b251ed02
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On linux, utmp isn't obsolete, and utmpx is the same as it, but on pretty much any other system utmp is obsolete and utmpx should be used instead.