From e18ecf33cf819a5f71ef3721513ac5936a43518b Mon Sep 17 00:00:00 2001 From: Nikolaus Rath Date: Sun, 2 Oct 2016 21:36:12 -0700 Subject: [PATCH] Document that client pid/gid/uid may be zero. Fixes #67. --- include/fuse_lowlevel.h | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/include/fuse_lowlevel.h b/include/fuse_lowlevel.h index 0822e51..3765598 100644 --- a/include/fuse_lowlevel.h +++ b/include/fuse_lowlevel.h @@ -98,7 +98,14 @@ struct fuse_entry_param { double entry_timeout; }; -/** Additional context associated with requests */ +/** + * Additional context associated with requests. + * + * Note that the reported client uid, gid and pid may be zero in some + * situations. For example, if the FUSE file system is running in a + * PID or user namespace but then accessed from outside the namespace, + * there is no valid uid/pid/gid that could be reported. + */ struct fuse_ctx { /** User ID of the calling process */ uid_t uid; @@ -109,7 +116,7 @@ struct fuse_ctx { /** Thread ID of the calling process */ pid_t pid; - /** Umask of the calling process (introduced in version 2.8) */ + /** Umask of the calling process */ mode_t umask; }; -- 2.30.2