/usr/include/postfix/set_eugid.h is in postfix-dev 2.9.1-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 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
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