Port: Implement faccessat wrapper

[babeltrace.git] / include / babeltrace / compat / fcntl.h

diff --git a/include/babeltrace/compat/fcntl.h b/include/babeltrace/compat/fcntl.h
index 59060ff563ce4714702b6b73784c09735c61d471..e5232b4cb69c9e446baf9b4fec30140e8e5ff06e 100644 (file)
--- a/include/babeltrace/compat/fcntl.h
+++ b/include/babeltrace/compat/fcntl.h
@@ -140,4 +140,44 @@ end:
 }
 #endif /* #else #ifdef BABELTRACE_HAVE_POSIX_FALLOCATE */
 
+
+#ifdef BABELTRACE_HAVE_FACCESSAT
+
+#include <fcntl.h>
+#include <unistd.h>
+
+static inline
+int bt_faccessat(int dirfd, const char *dirname,
+               const char *pathname, int mode, int flags)
+{
+       return faccessat(dirfd, pathname, mode, flags);
+}
+
+#else /* #ifdef BABELTRACE_HAVE_FACCESSAT */
+
+#include <string.h>
+#include <unistd.h>
+
+static inline
+int bt_faccessat(int dirfd, const char *dirname,
+               const char *pathname, int mode, int flags)
+{
+       char cpath[PATH_MAX];
+
+       if (flags != 0) {
+               errno = EINVAL;
+               return -1;
+       }
+       /* Includes middle / and final \0. */
+       if (strlen(dirname) + strlen(pathname) + 2 > PATH_MAX) {
+               return -1;
+       }
+       strcpy(cpath, dirname);
+       strcat(cpath, "/");
+       strcat(cpath, pathname);
+       return access(cpath, mode);
+}
+
+#endif /* #else #ifdef BABELTRACE_HAVE_FACCESSAT */
+
 #endif /* _BABELTRACE_COMPAT_FCNTL_H */