diff options
| author | Andrey Belov <defan@nginx.com> | 2012-02-13 20:29:04 +0400 |
|---|---|---|
| committer | Andrey Belov <defan@nginx.com> | 2012-02-13 20:29:04 +0400 |
| commit | bd1e719bf9c4bc58076e7b52e87be645c9b803f5 (patch) | |
| tree | f1c94ff9e91e2d2594ba9d1ae7f92120cca36722 /src/core/ngx_core.h | |
| parent | 32c8df44d5f53026d92ec24bcf4c864359395e55 (diff) | |
Added disable_symlinks directive.
To completely disable symlinks (disable_symlinks on)
we use openat(O_NOFOLLOW) for each path component
to avoid races.
To allow symlinks with the same owner (disable_symlinks if_not_owner),
use openat() (followed by fstat()) and fstatat(AT_SYMLINK_NOFOLLOW),
and then compare uids between fstat() and fstatat().
As there is a race between openat() and fstatat() we don't
know if openat() in fact opened symlink or not. Therefore,
we have to compare uids even if fstatat() reports the opened
component isn't a symlink (as we don't know whether it was
symlink during openat() or not).
Default value is off, i.e. symlinks are allowed.
Diffstat (limited to 'src/core/ngx_core.h')
| -rw-r--r-- | src/core/ngx_core.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/src/core/ngx_core.h b/src/core/ngx_core.h index 1ae55163d..435ce64e7 100644 --- a/src/core/ngx_core.h +++ b/src/core/ngx_core.h @@ -91,5 +91,10 @@ typedef void (*ngx_connection_handler_pt)(ngx_connection_t *c); void ngx_cpuinfo(void); +#if (NGX_HAVE_OPENAT) +#define NGX_DISABLE_SYMLINKS_OFF 0 +#define NGX_DISABLE_SYMLINKS_ON 1 +#define NGX_DISABLE_SYMLINKS_NOTOWNER 2 +#endif #endif /* _NGX_CORE_H_INCLUDED_ */ |