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
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
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 artifact. 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);
}
|
