diff options
author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 12:06:34 +0000 |
---|---|---|
committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 12:06:34 +0000 |
commit | 5e61585d76ae77fd5e9e96ebabb57afa4d74880d (patch) | |
tree | 2b467823aaeebc7ef8bc9e3cabe8074eaef1666d /src/util/sane_rename.c | |
parent | Initial commit. (diff) | |
download | postfix-upstream/3.5.24.tar.xz postfix-upstream/3.5.24.zip |
Adding upstream version 3.5.24.upstream/3.5.24upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/util/sane_rename.c')
-rw-r--r-- | src/util/sane_rename.c | 69 |
1 files changed, 69 insertions, 0 deletions
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 <sane_fsops.h> +/* +/* 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 <sys/stat.h> +#include <errno.h> +#include <stdio.h> /* 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); +} |