Switch uid/gid for Readdir() calls (#50)

jthiltges · web-flow · commit d1d60d3d3783 · 2023-08-10T20:42:39.000-05:00
stat()'ing entries in directories may require uid/gid switching when permissions are limited.
diff --git a/src/MultiuserDirectory.hh b/src/MultiuserDirectory.hh
@@ -30,6 +30,8 @@ public:
 
     int Readdir(char *buff, int blen) 
     {
+        UserSentry sentry(m_client, m_log);
+        if (!sentry.IsValid()) {return -EACCES;}
         return m_wrappedDir->Readdir(buff, blen);
     }
 

Original file line number	Diff line number	Diff line change
`@@ -30,6 +30,8 @@ public:`
`30`	`30`
`31`	`31`	`int Readdir(char *buff, int blen)`
`32`	`32`	`{`
	`33`	`+ UserSentry sentry(m_client, m_log);`
	`34`	`+ if (!sentry.IsValid()) {return -EACCES;}`
`33`	`35`	`return m_wrappedDir->Readdir(buff, blen);`
`34`	`36`	`}`
`35`	`37`