summaryrefslogtreecommitdiffstats
path: root/src/util/set_eugid.h
diff options
context:
space:
mode:
authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-10 19:59:03 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-10 19:59:03 +0000
commita848231ae0f346dc7cc000973fbeb65b0894ee92 (patch)
tree44b60b367c86723cc78383ef247885d72b388afe /src/util/set_eugid.h
parentInitial commit. (diff)
downloadpostfix-a848231ae0f346dc7cc000973fbeb65b0894ee92.tar.xz
postfix-a848231ae0f346dc7cc000973fbeb65b0894ee92.zip
Adding upstream version 3.8.5.upstream/3.8.5
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/util/set_eugid.h')
-rw-r--r--src/util/set_eugid.h43
1 files changed, 43 insertions, 0 deletions
diff --git a/src/util/set_eugid.h b/src/util/set_eugid.h
new file mode 100644
index 0000000..97a523e
--- /dev/null
+++ b/src/util/set_eugid.h
@@ -0,0 +1,43 @@
+#ifndef _SET_EUGID_H_INCLUDED_
+#define _SET_EUGID_H_INCLUDED_
+
+/*++
+/* NAME
+/* set_eugid 3h
+/* SUMMARY
+/* set effective user and group attributes
+/* SYNOPSIS
+/* #include <set_eugid.h>
+/* DESCRIPTION
+/* .nf
+
+ /* External interface. */
+
+extern void set_eugid(uid_t, gid_t);
+
+ /*
+ * The following macros open and close a block that runs at a different
+ * privilege level. To make mistakes with stray curly braces less likely, we
+ * shape the macros below as the head and tail of a do-while loop.
+ */
+#define SAVE_AND_SET_EUGID(uid, gid) do { \
+ uid_t __set_eugid_uid = geteuid(); \
+ gid_t __set_eugid_gid = getegid(); \
+ set_eugid((uid), (gid));
+
+#define RESTORE_SAVED_EUGID() \
+ set_eugid(__set_eugid_uid, __set_eugid_gid); \
+ } while (0)
+
+/* LICENSE
+/* .ad
+/* .fi
+/* The Secure Mailer license must be distributed with this software.
+/* AUTHOR(S)
+/* Wietse Venema
+/* IBM T.J. Watson Research
+/* P.O. Box 704
+/* Yorktown Heights, NY 10598, USA
+/*--*/
+
+#endif