diff options
Diffstat (limited to 'libdiskfs/io-pathconf.c')
| -rw-r--r-- | libdiskfs/io-pathconf.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/libdiskfs/io-pathconf.c b/libdiskfs/io-pathconf.c index 8c86cabf..b851f9b1 100644 --- a/libdiskfs/io-pathconf.c +++ b/libdiskfs/io-pathconf.c @@ -18,6 +18,8 @@ #include <unistd.h> #include "priv.h" #include "io_S.h" +#include <dirent.h> +#include <limits.h> /* Implement io_pathconf as described in <hurd/io.defs>. */ kern_return_t @@ -43,12 +45,16 @@ diskfs_S_io_pathconf (struct protid *cred, break; case _PC_NAME_MAX: - /* <hurd/hurd_types.defs> string_t constrains the upper bound. */ - *value = diskfs_name_max > 1023 ? 1023 : diskfs_name_max; + /* <hurd/hurd_types.defs> string_t constrains the upper bound. + The `struct dirent' format defined by libc further contrains it. */ +#define D_NAMLEN_MAX (UCHAR_MAX * sizeof (((struct dirent *) 0)->d_namlen)) + if (diskfs_name_max > D_NAMLEN_MAX || diskfs_name_max < 0) + diskfs_name_max = D_NAMLEN_MAX; + *value = diskfs_name_max; break; case _PC_NO_TRUNC: /* enforced in diskfs_lookup */ - *value = diskfs_name_max >= 0; + *value = 1; /* diskfs_name_max >= 0; */ /* see above */ break; case _PC_CHOWN_RESTRICTED: |