Index: fusl/src/stat/fchmodat.c |
diff --git a/fusl/src/stat/fchmodat.c b/fusl/src/stat/fchmodat.c |
new file mode 100644 |
index 0000000000000000000000000000000000000000..d94667aed5e1a4aa1e924bd89a8ba3aa3ec6aa16 |
--- /dev/null |
+++ b/fusl/src/stat/fchmodat.c |
@@ -0,0 +1,39 @@ |
+#include <sys/stat.h> |
+#include <fcntl.h> |
+#include <errno.h> |
+#include "syscall.h" |
+ |
+void __procfdname(char *, unsigned); |
+ |
+int fchmodat(int fd, const char *path, mode_t mode, int flag) |
+{ |
+ if (!flag) return syscall(SYS_fchmodat, fd, path, mode, flag); |
+ |
+ if (flag != AT_SYMLINK_NOFOLLOW) |
+ return __syscall_ret(-EINVAL); |
+ |
+ struct stat st; |
+ int ret, fd2; |
+ char proc[15+3*sizeof(int)]; |
+ |
+ if ((ret = __syscall(SYS_fstatat, fd, path, &st, flag))) |
+ return __syscall_ret(ret); |
+ if (S_ISLNK(st.st_mode)) |
+ return __syscall_ret(-EOPNOTSUPP); |
+ |
+ if ((fd2 = __syscall(SYS_openat, fd, path, O_RDONLY|O_PATH|O_NOFOLLOW|O_NOCTTY|O_CLOEXEC)) < 0) { |
+ if (fd2 == -ELOOP) |
+ return __syscall_ret(-EOPNOTSUPP); |
+ return __syscall_ret(fd2); |
+ } |
+ |
+ __procfdname(proc, fd2); |
+ ret = __syscall(SYS_fstatat, AT_FDCWD, proc, &st, 0); |
+ if (!ret) { |
+ if (S_ISLNK(st.st_mode)) ret = -EOPNOTSUPP; |
+ else ret = __syscall(SYS_fchmodat, AT_FDCWD, proc, mode); |
+ } |
+ |
+ __syscall(SYS_close, fd2); |
+ return __syscall_ret(ret); |
+} |