From b7c15c31519dc44c1f691e0466badd556ffe9423 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 18:18:56 +0200 Subject: Adding upstream version 3.7.10. Signed-off-by: Daniel Baumann --- src/global/dot_lockfile_as.c | 99 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 99 insertions(+) create mode 100644 src/global/dot_lockfile_as.c (limited to 'src/global/dot_lockfile_as.c') diff --git a/src/global/dot_lockfile_as.c b/src/global/dot_lockfile_as.c new file mode 100644 index 0000000..7ee84d9 --- /dev/null +++ b/src/global/dot_lockfile_as.c @@ -0,0 +1,99 @@ +/*++ +/* NAME +/* dot_lockfile_as 3 +/* SUMMARY +/* dotlock file as user +/* SYNOPSIS +/* #include +/* +/* int dot_lockfile_as(path, why, euid, egid) +/* const char *path; +/* VSTRING *why; +/* uid_t euid; +/* gid_t egid; +/* +/* void dot_unlockfile_as(path, euid, egid) +/* const char *path; +/* uid_t euid; +/* gid_t egid; +/* DESCRIPTION +/* dot_lockfile_as() and dot_unlockfile_as() are wrappers around +/* the dot_lockfile() and dot_unlockfile() routines. The routines +/* change privilege to the designated privilege, perform the +/* requested operation, and restore privileges. +/* DIAGNOSTICS +/* Fatal error: no permission to change privilege level. +/* SEE ALSO +/* dot_lockfile(3) dotlock file management +/* set_eugid(3) switch effective rights +/* 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 +/*--*/ + +/* System library. */ + +#include +#include + +/* Utility library. */ + +#include "msg.h" +#include "set_eugid.h" +#include "dot_lockfile.h" +#include "dot_lockfile_as.h" + +/* dot_lockfile_as - dotlock file as user */ + +int dot_lockfile_as(const char *path, VSTRING *why, uid_t euid, gid_t egid) +{ + uid_t saved_euid = geteuid(); + gid_t saved_egid = getegid(); + int result; + + /* + * Switch to the target user privileges. + */ + set_eugid(euid, egid); + + /* + * Lock that file. + */ + result = dot_lockfile(path, why); + + /* + * Restore saved privileges. + */ + set_eugid(saved_euid, saved_egid); + + return (result); +} + +/* dot_unlockfile_as - dotlock file as user */ + +void dot_unlockfile_as(const char *path, uid_t euid, gid_t egid) +{ + uid_t saved_euid = geteuid(); + gid_t saved_egid = getegid(); + + /* + * Switch to the target user privileges. + */ + set_eugid(euid, egid); + + /* + * Lock that file. + */ + dot_unlockfile(path); + + /* + * Restore saved privileges. + */ + set_eugid(saved_euid, saved_egid); +} -- cgit v1.2.3