os: multiple TestRoot testcase failures in AIX platform

[ayappanec]

--- FAIL: TestRootConsistencyOpen (0.45s)
    --- FAIL: TestRootConsistencyOpen/file_slash (0.01s)
        root_test.go:1320: with root:    res=
        root_test.go:1321:               err=openat target/: not a directory
        root_test.go:1322: without root: res=target
        root_test.go:1323:               err=<nil>
        root_test.go:1324: want consistent results, got mismatch
    --- FAIL: TestRootConsistencyOpen/symlink_to_file_ends_in_slash (0.04s)
        root_test.go:1320: with root:    res=
        root_test.go:1321:               err=openat link: not a directory
        root_test.go:1322: without root: res=file
        root_test.go:1323:               err=<nil>
        root_test.go:1324: want consistent results, got mismatch
--- FAIL: TestRootConsistencyCreate (0.31s)
    --- FAIL: TestRootConsistencyCreate/file_slash (0.02s)
        root_test.go:1320: with root:    res=
        root_test.go:1321:               err=openat target/: not a directory
        root_test.go:1322: without root: res=
        root_test.go:1323:               err=<nil>
        root_test.go:1324: want consistent results, got mismatch
    --- FAIL: TestRootConsistencyCreate/symlink_to_file_ends_in_slash (0.01s)
        root_test.go:1320: with root:    res=
        root_test.go:1321:               err=openat link: not a directory
        root_test.go:1322: without root: res=
        root_test.go:1323:               err=<nil>
        root_test.go:1324: want consistent results, got mismatch
--- FAIL: TestRootConsistencyChmod (0.23s)
    --- FAIL: TestRootConsistencyChmod/file_slash (0.01s)
        root_test.go:1320: with root:    res=chmod 0o555
        root_test.go:1321:               err=chmodat target/: not a directory
        root_test.go:1322: without root: res=-r-xr-xr-x -rwxrwxrwx
        root_test.go:1323:               err=<nil>
        root_test.go:1324: want consistent results, got mismatch
    --- FAIL: TestRootConsistencyChmod/symlink_to_file_ends_in_slash (0.01s)
        root_test.go:1320: with root:    res=chmod 0o555
        root_test.go:1321:               err=chmodat link: not a directory
        root_test.go:1322: without root: res=Lrwxrwxrwx Lrwxrwxrwx
        root_test.go:1323:               err=<nil>
        root_test.go:1324: want consistent results, got mismatch
--- FAIL: TestRootConsistencyRemove (0.71s)
.........
.........

This is seen after the CL https://go-review.googlesource.com/c/go/+/797880

[prattmic]

cc @golang/aix @neild

[neild]

Unfortunately, this is difficult to fix without a working AIX builder. (#67299)

@ayappanec, could you try running tests with https://go.dev/cl/800400 patched in? If this fixes the failures, we can probably submit it even without a working builder. (This CL disables various tests which check consistency of operations--Root.Open("foo/") should behave the same as os.Open("foo/") when "foo" is a file, for example. It doesn't change any behavior, just skips some tests.)

[gopherbot]

Change https://go.dev/cl/800400 mentions this issue: os: skip root trailing-slash consistency tests on AIX

[ayappanec]

Unfortunately, this is difficult to fix without a working AIX builder. (#67299)

@ayappanec, could you try running tests with https://go.dev/cl/800400 patched in? If this fixes the failures, we can probably submit it even without a working builder. (This CL disables various tests which check consistency of operations--Root.Open("foo/") should behave the same as os.Open("foo/") when "foo" is a file, for example. It doesn't change any behavior, just skips some tests.)

Let me check

[ayappanec]

With the above changes, few errors are resolved but there are errors related to symlinks

--- FAIL: TestRootConsistencyOpen (0.75s)
    --- FAIL: TestRootConsistencyOpen/symlink_to_file_ends_in_slash (0.02s)
        root_test.go:1325: with root:    res=
        root_test.go:1326:               err=openat link: not a directory
        root_test.go:1327: without root: res=file
        root_test.go:1328:               err=<nil>
        root_test.go:1329: want consistent results, got mismatch
--- FAIL: TestRootConsistencyCreate (0.78s)
    --- FAIL: TestRootConsistencyCreate/symlink_to_file_ends_in_slash (0.04s)
        root_test.go:1325: with root:    res=
        root_test.go:1326:               err=openat link: not a directory
        root_test.go:1327: without root: res=
        root_test.go:1328:               err=<nil>
        root_test.go:1329: want consistent results, got mismatch
--- FAIL: TestRootConsistencyChmod (0.78s)
    --- FAIL: TestRootConsistencyChmod/symlink_to_file_ends_in_slash (0.06s)
        root_test.go:1325: with root:    res=chmod 0o555
        root_test.go:1326:               err=chmodat link: not a directory
        root_test.go:1327: without root: res=Lrwxrwxrwx Lrwxrwxrwx
        root_test.go:1328:               err=<nil>
        root_test.go:1329: want consistent results, got mismatch
--- FAIL: TestRootConsistencyStat (0.25s)
    --- FAIL: TestRootConsistencyStat/symlink_to_file_ends_in_slash (0.00s)
        root_test.go:1325: with root:    res=
        root_test.go:1326:               err=statat link: not a directory
        root_test.go:1327: without root: res=name:"link" size:4 mode:-rw-r--r-- isdir:false
        root_test.go:1328:               err=<nil>
        root_test.go:1329: want consistent results, got mismatch
--- FAIL: TestRootMultiReadFile (0.78s)
    --- FAIL: TestRootMultiReadFile/bD (0.01s)
        root_test.go:3302: root.ReadFile("target"):
            got error:  <nil>
            want error: any error
        root_test.go:2242: Initial directory contents:
        root_test.go:2244:   drwxr-xr-x DIR/
        root_test.go:2244:   drwxr-xr-x target/
    --- FAIL: TestRootMultiReadFile/bsD (0.03s)
        root_test.go:3302: root.ReadFile("target/"):
            got error:  <nil>
            want error: any error
        root_test.go:2242: Initial directory contents:
        root_test.go:2244:   drwxr-xr-x DIR/
        root_test.go:2244:   drwxr-xr-x target/
    --- FAIL: TestRootMultiReadFile/dpbD (0.03s)
        root_test.go:3302: root.ReadFile("DIR/../target"):
            got error:  <nil>
            want error: any error
        root_test.go:2242: Initial directory contents:
        root_test.go:2244:   drwxr-xr-x DIR/
        root_test.go:2244:   drwxr-xr-x target/
    --- FAIL: TestRootMultiReadFile/dpbsD (0.01s)
        root_test.go:3302: root.ReadFile("DIR/../target/"):
            got error:  <nil>
            want error: any error
        root_test.go:2242: Initial directory contents:
        root_test.go:2244:   drwxr-xr-x DIR/
        root_test.go:2244:   drwxr-xr-x target/
    --- FAIL: TestRootMultiReadFile/prbD (0.02s)
        root_test.go:3302: os.ReadFile("/tmp/TestRootMultiReadFileprbD248437705/002/ROOT/../ROOT/target"):
            got error:  <nil>
            want error: any error
        root_test.go:2242: Initial directory contents:
        root_test.go:2244:   drwxr-xr-x DIR/
        root_test.go:2244:   drwxr-xr-x target/
    --- FAIL: TestRootMultiReadFile/srbD (0.00s)
        root_test.go:3302: os.ReadFile("/tmp/TestRootMultiReadFilesrbD784487395/002/ROOT/target"):
            got error:  <nil>
            want error: any error
        root_test.go:2242: Initial directory contents:
        root_test.go:2244:   drwxr-xr-x DIR/
        root_test.go:2244:   drwxr-xr-x target/
    --- FAIL: TestRootMultiReadFile/bSbD (0.02s)
        root_test.go:3302: root.ReadFile("target"):
            got error:  <nil>
            want error: any error
        root_test.go:2242: Initial directory contents:
        root_test.go:2244:   drwxr-xr-x DIR/
        root_test.go:2244:   drwxr-xr-x s_target/
        root_test.go:2244:   Lrwxrwxrwx target => s_target
    --- FAIL: TestRootMultiReadFile/bSbsD (0.02s)
        root_test.go:3302: root.ReadFile("target"):
            got error:  <nil>
            want error: any error
        root_test.go:2242: Initial directory contents:
        root_test.go:2244:   drwxr-xr-x DIR/
        root_test.go:2244:   drwxr-xr-x s_target/
        root_test.go:2244:   Lrwxrwxrwx target => s_target/
    --- FAIL: TestRootMultiReadFile/bSdpbD (0.01s)
        root_test.go:3302: root.ReadFile("target"):
            got error:  <nil>
            want error: any error
        root_test.go:2242: Initial directory contents:
        root_test.go:2244:   drwxr-xr-x DIR/
        root_test.go:2244:   drwxr-xr-x s_target/
        root_test.go:2244:   Lrwxrwxrwx target => DIR/../s_target
    --- FAIL: TestRootMultiReadFile/bSdpbsD (0.01s)
        root_test.go:3302: root.ReadFile("target"):
            got error:  <nil>
            want error: any error
        root_test.go:2242: Initial directory contents:
        root_test.go:2244:   drwxr-xr-x DIR/
        root_test.go:2244:   drwxr-xr-x s_target/
        root_test.go:2244:   Lrwxrwxrwx target => DIR/../s_target/
    --- FAIL: TestRootMultiReadFile/bSprbD (0.01s)
        root_test.go:3302: os.ReadFile("/tmp/TestRootMultiReadFilebSprbD3090839592/002/ROOT/target"):
            got error:  <nil>
            want error: any error
        root_test.go:2242: Initial directory contents:
        root_test.go:2244:   drwxr-xr-x DIR/
        root_test.go:2244:   drwxr-xr-x s_target/
        root_test.go:2244:   Lrwxrwxrwx target => ../ROOT/s_target
    --- FAIL: TestRootMultiReadFile/bSsrbD (0.01s)
        root_test.go:3302: os.ReadFile("/tmp/TestRootMultiReadFilebSsrbD3037956466/002/ROOT/target"):
            got error:  <nil>
            want error: any error
        root_test.go:2242: Initial directory contents:
        root_test.go:2244:   drwxr-xr-x DIR/
        root_test.go:2244:   drwxr-xr-x s_target/
        root_test.go:2244:   Lrwxrwxrwx target => /.../s_target
    --- FAIL: TestRootMultiReadFile/bsSbD (0.03s)
        root_test.go:3302: root.ReadFile("target/"):
            got error:  <nil>
            want error: any error
        root_test.go:2242: Initial directory contents:
        root_test.go:2244:   drwxr-xr-x DIR/
        root_test.go:2244:   drwxr-xr-x s_target/
        root_test.go:2244:   Lrwxrwxrwx target => s_target
    --- FAIL: TestRootMultiReadFile/bsSbsD (0.01s)
        root_test.go:3302: root.ReadFile("target/"):
            got error:  <nil>
            want error: any error
        root_test.go:2242: Initial directory contents:
        root_test.go:2244:   drwxr-xr-x DIR/
        root_test.go:2244:   drwxr-xr-x s_target/
        root_test.go:2244:   Lrwxrwxrwx target => s_target/
    --- FAIL: TestRootMultiReadFile/bsSdpbD (0.01s)
        root_test.go:3302: root.ReadFile("target/"):
            got error:  <nil>
            want error: any error
        root_test.go:2242: Initial directory contents:
        root_test.go:2244:   drwxr-xr-x DIR/
        root_test.go:2244:   drwxr-xr-x s_target/
        root_test.go:2244:   Lrwxrwxrwx target => DIR/../s_target
    --- FAIL: TestRootMultiReadFile/bsSdpbsD (0.02s)
        root_test.go:3302: root.ReadFile("target/"):
            got error:  <nil>
            want error: any error
        root_test.go:2242: Initial directory contents:
        root_test.go:2244:   drwxr-xr-x DIR/
        root_test.go:2244:   drwxr-xr-x s_target/
        root_test.go:2244:   Lrwxrwxrwx target => DIR/../s_target/
--- FAIL: TestRootConsistencyChown (0.25s)
    --- FAIL: TestRootConsistencyChown/symlink_to_file_ends_in_slash (0.01s)
        root_test.go:1325: with root:    res=
        root_test.go:1326:               err=chownat link: not a directory
        root_test.go:1327: without root: res=205 1
        root_test.go:1328:               err=<nil>
        root_test.go:1329: want consistent results, got mismatch