From b5896ba9f6047e7031e2bdee0622d543e11a6734 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Mon, 6 May 2024 03:46:30 +0200 Subject: Adding upstream version 3.4.23. Signed-off-by: Daniel Baumann --- src/util/sane_rename.c | 69 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 69 insertions(+) create mode 100644 src/util/sane_rename.c (limited to 'src/util/sane_rename.c') diff --git a/src/util/sane_rename.c b/src/util/sane_rename.c new file mode 100644 index 0000000..4c55160 --- /dev/null +++ b/src/util/sane_rename.c @@ -0,0 +1,69 @@ +/*++ +/* NAME +/* sane_rename 3 +/* SUMMARY +/* sanitize rename() error returns +/* SYNOPSIS +/* #include +/* +/* int sane_rename(old, new) +/* const char *from; +/* const char *to; +/* DESCRIPTION +/* sane_rename() implements the rename(2) system call, and works +/* around some errors that are possible with NFS file systems. +/* 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 "sys_defs.h" +#include +#include +#include /* rename(2) syscall in stdio.h? */ + +/* Utility library. */ + +#include "msg.h" +#include "sane_fsops.h" +#include "warn_stat.h" + +/* sane_rename - sanitize rename() error returns */ + +int sane_rename(const char *from, const char *to) +{ + const char *myname = "sane_rename"; + int saved_errno; + struct stat st; + + /* + * Normal case: rename() succeeds. + */ + if (rename(from, to) >= 0) + return (0); + + /* + * Woops. Save errno, and see if the error is an NFS artefact. If it is, + * pretend the error never happened. + */ + saved_errno = errno; + if (stat(from, &st) < 0 && stat(to, &st) >= 0) { + msg_info("%s(%s,%s): worked around spurious NFS error", + myname, from, to); + return (0); + } + + /* + * Nope, it didn't. Restore errno and report the error. + */ + errno = saved_errno; + return (-1); +} -- cgit v1.2.3