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tests: add Fchmodat test 

Test that we handle symlinks correctly.
This commit is contained in:
Jakob Unterwurzacher 2019-01-07 23:00:05 +01:00
parent 57a52d6aef
commit 8253c55386
1 changed files with 54 additions and 0 deletions
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54
internal/syscallcompat/sys_common_test.go
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@ -2,6 +2,7 @@ package syscallcompat
import (
"bytes"
"os"
"syscall"
"testing"
)
@ -32,3 +33,56 @@ func TestReadlinkat(t *testing.T) {
}
}
}
func TestFchmodat(t *testing.T) {
regular := "TestFchmodat_Regular"
f, err := os.OpenFile(tmpDir+"/"+regular, os.O_CREATE|os.O_WRONLY, 0000)
if err != nil {
t.Fatal(err)
}
f.Close()
symlink := "TestFchmodat_Symlink"
err = syscall.Symlink(regular, tmpDir+"/"+symlink)
if err != nil {
t.Fatal(err)
}
dirfd, err := syscall.Open(tmpDir, syscall.O_RDONLY, 0)
if err != nil {
t.Fatal(err)
}
defer syscall.Close(dirfd)
// Check that chmod on a regular file works ok
err = Fchmodat(dirfd, regular, 0111, 0)
if err != nil {
t.Fatal(err)
}
var st syscall.Stat_t
syscall.Lstat(tmpDir+"/"+regular, &st)
st.Mode &= 0777
if st.Mode != 0111 {
t.Errorf("wrong mode: %#0o", st.Mode)
}
err = Fchmodat(dirfd, regular, 0000, 0)
if err != nil {
t.Error(err)
}
syscall.Lstat(tmpDir+"/"+regular, &st)
st.Mode &= 0777
if st.Mode != 0000 {
t.Errorf("wrong mode: %#0o", st.Mode)
}
// Check what happens on a symlink
err = Fchmodat(dirfd, symlink, 0333, 0)
if err == nil {
syscall.Lstat(tmpDir+"/"+symlink, &st)
st.Mode &= 0777
t.Errorf("chmod on symlink should have failed, but did not. New mode=%#0o", st.Mode)
}
syscall.Lstat(tmpDir+"/"+regular, &st)
st.Mode &= 0777
if st.Mode != 0000 {
t.Errorf("chmod on symlink affected symlink target: New mode=%#0o", st.Mode)
}
}