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-rw-r--r--internal/syscallcompat/sys_darwin.go17
-rw-r--r--internal/syscallcompat/sys_linux.go5
2 files changed, 22 insertions, 0 deletions
diff --git a/internal/syscallcompat/sys_darwin.go b/internal/syscallcompat/sys_darwin.go
index 527598b..367f67d 100644
--- a/internal/syscallcompat/sys_darwin.go
+++ b/internal/syscallcompat/sys_darwin.go
@@ -137,6 +137,23 @@ func Dup3(oldfd int, newfd int, flags int) (err error) {
return syscall.Dup2(oldfd, newfd)
}
+// Poor man's Fchmodat.
+func Fchmodat(dirfd int, path string, mode uint32, flags int) (err error) {
+ chdirMutex.Lock()
+ defer chdirMutex.Unlock()
+ cwd, err := syscall.Open(".", syscall.O_RDONLY, 0)
+ if err != nil {
+ return err
+ }
+ defer syscall.Close(cwd)
+ err = syscall.Fchdir(dirfd)
+ if err != nil {
+ return err
+ }
+ defer syscall.Fchdir(cwd)
+ return syscall.Chmod(path, mode)
+}
+
// Poor man's Fchownat.
func Fchownat(dirfd int, path string, uid int, gid int, flags int) (err error) {
chdirMutex.Lock()
diff --git a/internal/syscallcompat/sys_linux.go b/internal/syscallcompat/sys_linux.go
index 0e9d6ac..4fe44fd 100644
--- a/internal/syscallcompat/sys_linux.go
+++ b/internal/syscallcompat/sys_linux.go
@@ -80,6 +80,11 @@ func Dup3(oldfd int, newfd int, flags int) (err error) {
return syscall.Dup3(oldfd, newfd, flags)
}
+// Fchmodat syscall.
+func Fchmodat(dirfd int, path string, mode uint32, flags int) (err error) {
+ return syscall.Fchmodat(dirfd, path, mode, flags)
+}
+
// Fchownat syscall.
func Fchownat(dirfd int, path string, uid int, gid int, flags int) (err error) {
return syscall.Fchownat(dirfd, path, uid, gid, flags)