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libzigc: chmod, mkdir{at}, mknod{at}, mkfifo{at}, umask #35732

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kid wants to merge 5 commits from kid/libzigc-sys-stat into master AGit
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Contributes to #30978

Contributes to #30978
@ -0,0 +13,4 @@
constexpectEqual=testing.expectEqual;
test"chmod"{
if(native_os==.windowsornative_os==.wasi)return;
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Please add a comment to these lines justifying them, even if it's just something simple like // no chmod.

Please add a comment to these lines justifying them, even if it's just something simple like `// no chmod`.
kid marked this conversation as resolved
@ -1137,3 +1137,3 @@
returnsyscall3(.mknod,@intFromPtr(path),mode,dev);
}else{
returnmknodat(AT.FDCWD,path,mode,dev);
returnsyscall4(.mknodat,@as(u32,@bitCast(@as(i32,AT.FDCWD))),@intFromPtr(path),mode,dev);
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Why is this change (and the one below) needed?

Why is this change (and the one below) needed?
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I noticed that the fchmodat() impl in musl is quite different from the std.os.linux one, which may potentially break chmod() if someone enhances std.os.linux's fchmodat(). Make this change for mknod() as well to avoid the similar situation.

I noticed that the `fchmodat()` impl in musl is quite different from the `std.os.linux` one, which may potentially break `chmod()` if someone enhances `std.os.linux`'s `fchmodat()`. Make this change for `mknod()` as well to avoid the similar situation.
kid force-pushed kid/libzigc-sys-stat from baca8914de
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