diff options
Diffstat (limited to 'winsup/cygwin/fhandler.cc')
| -rw-r--r-- | winsup/cygwin/fhandler.cc | 87 |
1 files changed, 86 insertions, 1 deletions
diff --git a/winsup/cygwin/fhandler.cc b/winsup/cygwin/fhandler.cc index d5619bd63..98b685b87 100644 --- a/winsup/cygwin/fhandler.cc +++ b/winsup/cygwin/fhandler.cc @@ -328,7 +328,92 @@ fhandler_base::device_access_denied (int flags) if (!mode) mode |= R_OK; - return access_worker (pc, mode, this); + return fhaccess (mode); +} + +bool +fhandler_base::fhaccess (int flags) +{ + if (error ()) + { + set_errno (error ()); + return -1; + } + + if (!exists ()) + { + set_errno (ENOENT); + return -1; + } + + if (!(flags & (R_OK | W_OK | X_OK))) + return 0; + + if (is_fs_special ()) + /* short circuit */; + else if (has_attribute (FILE_ATTRIBUTE_READONLY) && (flags & W_OK)) + { + set_errno (EACCES); + return -1; + } + else if (has_acls () && allow_ntsec) + return check_file_access (get_win32_name (), flags); + + struct __stat64 st; + int r = fstat (&st); + if (r) + return -1; + r = -1; + if (flags & R_OK) + { + if (st.st_uid == myself->uid) + { + if (!(st.st_mode & S_IRUSR)) + goto done; + } + else if (st.st_gid == myself->gid) + { + if (!(st.st_mode & S_IRGRP)) + goto done; + } + else if (!(st.st_mode & S_IROTH)) + goto done; + } + if (flags & W_OK) + { + if (st.st_uid == myself->uid) + { + if (!(st.st_mode & S_IWUSR)) + goto done; + } + else if (st.st_gid == myself->gid) + { + if (!(st.st_mode & S_IWGRP)) + goto done; + } + else if (!(st.st_mode & S_IWOTH)) + goto done; + } + if (flags & X_OK) + { + if (st.st_uid == myself->uid) + { + if (!(st.st_mode & S_IXUSR)) + goto done; + } + else if (st.st_gid == myself->gid) + { + if (!(st.st_mode & S_IXGRP)) + goto done; + } + else if (!(st.st_mode & S_IXOTH)) + goto done; + } + r = 0; +done: + if (r) + set_errno (EACCES); + return r; } /* Open system call handler function. */ |