mirror of
https://git.savannah.gnu.org/git/emacs.git
synced 2024-12-04 08:47:11 +00:00
365e01cc9f
Run "TZ=UTC0 admin/update-copyright $(git ls-files)".
874 lines
21 KiB
C
874 lines
21 KiB
C
/* movemail foo bar -- move file foo to file bar,
|
||
locking file foo the way /bin/mail respects.
|
||
|
||
Copyright (C) 1986, 1992-1994, 1996, 1999, 2001-2020 Free Software
|
||
Foundation, Inc.
|
||
|
||
This file is part of GNU Emacs.
|
||
|
||
GNU Emacs is free software: you can redistribute it and/or modify
|
||
it under the terms of the GNU General Public License as published by
|
||
the Free Software Foundation, either version 3 of the License, or (at
|
||
your option) any later version.
|
||
|
||
GNU Emacs is distributed in the hope that it will be useful,
|
||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
GNU General Public License for more details.
|
||
|
||
You should have received a copy of the GNU General Public License
|
||
along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>. */
|
||
|
||
|
||
/* Important notice: defining MAIL_USE_FLOCK or MAIL_USE_LOCKF *will
|
||
cause loss of mail* if you do it on a system that does not normally
|
||
use flock/lockf as its way of interlocking access to inbox files. The
|
||
setting of MAIL_USE_FLOCK and MAIL_USE_LOCKF *must agree* with the
|
||
system's own conventions. It is not a choice that is up to you.
|
||
|
||
So, if your system uses lock files rather than flock, then the only way
|
||
you can get proper operation is to enable movemail to write lockfiles there.
|
||
This means you must either give that directory access modes
|
||
that permit everyone to write lockfiles in it, or you must make movemail
|
||
a setuid or setgid program. */
|
||
|
||
/*
|
||
* Modified January, 1986 by Michael R. Gretzinger (Project Athena)
|
||
*
|
||
* Added POP (Post Office Protocol) service. When compiled -DMAIL_USE_POP
|
||
* movemail will accept input filename arguments of the form
|
||
* "po:username". This will cause movemail to open a connection to
|
||
* a pop server running on $MAILHOST (environment variable). Movemail
|
||
* must be setuid to root in order to work with POP.
|
||
*
|
||
* New module: popmail.c
|
||
* Modified routines:
|
||
* main - added code within #ifdef MAIL_USE_POP; added setuid (getuid ())
|
||
* after POP code.
|
||
* New routines in movemail.c:
|
||
* get_errmsg - return pointer to system error message
|
||
*
|
||
* Modified August, 1993 by Jonathan Kamens (OpenVision Technologies)
|
||
*
|
||
* Move all of the POP code into a separate file, "pop.c".
|
||
* Use strerror instead of get_errmsg.
|
||
*
|
||
*/
|
||
|
||
#include <config.h>
|
||
#include <sys/types.h>
|
||
#include <sys/stat.h>
|
||
#include <sys/file.h>
|
||
#include <stdlib.h>
|
||
#include <errno.h>
|
||
#include <time.h>
|
||
|
||
#include <getopt.h>
|
||
#include <unistd.h>
|
||
#include <fcntl.h>
|
||
#include <signal.h>
|
||
#include <string.h>
|
||
|
||
#include <unlocked-io.h>
|
||
|
||
#include "syswait.h"
|
||
#ifdef MAIL_USE_POP
|
||
#include "pop.h"
|
||
#endif
|
||
|
||
#ifdef MSDOS
|
||
#undef access
|
||
#endif /* MSDOS */
|
||
|
||
#ifdef WINDOWSNT
|
||
#include "ntlib.h"
|
||
#undef access
|
||
#undef unlink
|
||
#define fork() 0
|
||
#define waitpid(child, var, flags) (*(var) = 0)
|
||
/* Unfortunately, Samba doesn't seem to properly lock Unix files even
|
||
though the locking call succeeds (and indeed blocks local access from
|
||
other NT programs). If you have direct file access using an NFS
|
||
client or something other than Samba, the locking call might work
|
||
properly - make sure it does before you enable this!
|
||
|
||
[18-Feb-97 andrewi] I now believe my comment above to be incorrect,
|
||
since it was based on a misunderstanding of how locking calls are
|
||
implemented and used on Unix. */
|
||
//#define DISABLE_DIRECT_ACCESS
|
||
|
||
#include <fcntl.h>
|
||
#endif /* WINDOWSNT */
|
||
|
||
#ifdef WINDOWSNT
|
||
#include <sys/locking.h>
|
||
#endif
|
||
|
||
/* If your system uses the `flock' or `lockf' system call for mail locking,
|
||
define MAIL_USE_SYSTEM_LOCK. If your system type should always define
|
||
MAIL_USE_LOCKF or MAIL_USE_FLOCK but configure does not do this,
|
||
please make a bug report. */
|
||
|
||
#ifdef MAIL_USE_LOCKF
|
||
#define MAIL_USE_SYSTEM_LOCK
|
||
#endif
|
||
|
||
#ifdef MAIL_USE_FLOCK
|
||
#define MAIL_USE_SYSTEM_LOCK
|
||
#endif
|
||
|
||
#if (!defined MAIL_USE_SYSTEM_LOCK \
|
||
&& (defined HAVE_LIBMAIL || defined HAVE_LIBLOCKFILE) \
|
||
&& defined HAVE_MAILLOCK_H)
|
||
#include <maillock.h>
|
||
/* We can't use maillock unless we know what directory system mail
|
||
files appear in. */
|
||
#ifdef MAILDIR
|
||
#define MAIL_USE_MAILLOCK
|
||
static char *mail_spool_name (char *);
|
||
#endif
|
||
#endif
|
||
|
||
static _Noreturn void fatal (const char *s1, const char *s2, const char *s3);
|
||
static void error (const char *s1, const char *s2, const char *s3);
|
||
static _Noreturn void pfatal_with_name (char *name);
|
||
static _Noreturn void pfatal_and_delete (char *name);
|
||
#ifdef MAIL_USE_POP
|
||
static int popmail (char *, char *, bool, char *, bool);
|
||
static bool pop_retr (popserver, int, FILE *);
|
||
static bool mbx_write (char *, int, FILE *);
|
||
static bool mbx_delimit_begin (FILE *);
|
||
static bool mbx_delimit_end (FILE *);
|
||
#endif
|
||
|
||
#if (defined MAIL_USE_MAILLOCK \
|
||
|| (!defined DISABLE_DIRECT_ACCESS && !defined MAIL_USE_SYSTEM_LOCK))
|
||
/* Like malloc but get fatal error if memory is exhausted. */
|
||
|
||
static void * ATTRIBUTE_MALLOC
|
||
xmalloc (size_t size)
|
||
{
|
||
void *result = malloc (size);
|
||
if (!result)
|
||
fatal ("virtual memory exhausted", 0, 0);
|
||
return result;
|
||
}
|
||
#endif
|
||
|
||
/* Nonzero means this is name of a lock file to delete on fatal error. */
|
||
static char *delete_lockname;
|
||
|
||
int
|
||
main (int argc, char **argv)
|
||
{
|
||
char *inname, *outname;
|
||
int indesc, outdesc;
|
||
ssize_t nread;
|
||
int wait_status;
|
||
int c;
|
||
bool preserve_mail = false;
|
||
|
||
#ifndef MAIL_USE_SYSTEM_LOCK
|
||
struct stat st;
|
||
int tem;
|
||
char *tempname;
|
||
size_t inname_len, inname_dirlen;
|
||
int desc;
|
||
#endif /* not MAIL_USE_SYSTEM_LOCK */
|
||
|
||
#ifdef MAIL_USE_POP
|
||
bool pop_reverse_order = false;
|
||
# define ARGSTR "pr"
|
||
#else /* ! MAIL_USE_POP */
|
||
# define ARGSTR "p"
|
||
#endif /* MAIL_USE_POP */
|
||
|
||
uid_t real_gid = getgid ();
|
||
uid_t priv_gid = getegid ();
|
||
|
||
delete_lockname = 0;
|
||
|
||
while (0 <= (c = getopt (argc, argv, ARGSTR)))
|
||
{
|
||
switch (c) {
|
||
#ifdef MAIL_USE_POP
|
||
case 'r':
|
||
pop_reverse_order = true;
|
||
break;
|
||
#endif
|
||
case 'p':
|
||
preserve_mail = true;
|
||
break;
|
||
default:
|
||
return EXIT_FAILURE;
|
||
}
|
||
}
|
||
|
||
if (
|
||
#ifdef MAIL_USE_POP
|
||
(argc - optind < 2) || (argc - optind > 3)
|
||
#else
|
||
(argc - optind != 2)
|
||
#endif
|
||
)
|
||
{
|
||
#ifdef MAIL_USE_POP
|
||
fprintf (stderr, "Usage: movemail [-p] [-r] inbox destfile%s\n",
|
||
" [POP-password]");
|
||
#else
|
||
fprintf (stderr, "Usage: movemail [-p] inbox destfile%s\n", "");
|
||
#endif
|
||
return EXIT_FAILURE;
|
||
}
|
||
|
||
inname = argv[optind];
|
||
outname = argv[optind+1];
|
||
|
||
if (*outname == 0)
|
||
fatal ("Destination file name is empty", 0, 0);
|
||
|
||
#ifdef MAIL_USE_POP
|
||
if (!strncmp (inname, "po:", 3))
|
||
{
|
||
int status;
|
||
|
||
status = popmail (inname + 3, outname, preserve_mail,
|
||
(argc - optind == 3) ? argv[optind+2] : NULL,
|
||
pop_reverse_order);
|
||
return status;
|
||
}
|
||
|
||
if (setuid (getuid ()) < 0)
|
||
fatal ("Failed to drop privileges", 0, 0);
|
||
|
||
#endif /* MAIL_USE_POP */
|
||
|
||
#ifndef DISABLE_DIRECT_ACCESS
|
||
|
||
char *lockname = 0;
|
||
char *spool_name = 0;
|
||
|
||
#ifdef MAIL_USE_MAILLOCK
|
||
spool_name = mail_spool_name (inname);
|
||
#endif
|
||
if (! spool_name)
|
||
{
|
||
#ifndef MAIL_USE_SYSTEM_LOCK
|
||
/* Use a lock file named after our first argument with .lock appended:
|
||
If it exists, the mail file is locked. */
|
||
/* Note: this locking mechanism is *required* by the mailer
|
||
(on systems which use it) to prevent loss of mail.
|
||
|
||
On systems that use a lock file, extracting the mail without locking
|
||
WILL occasionally cause loss of mail due to timing errors!
|
||
|
||
So, if creation of the lock file fails due to access
|
||
permission on the mail spool directory, you simply MUST
|
||
change the permission and/or make movemail a setgid program
|
||
so it can create lock files properly.
|
||
|
||
You might also wish to verify that your system is one which
|
||
uses lock files for this purpose. Some systems use other methods. */
|
||
|
||
inname_len = strlen (inname);
|
||
lockname = xmalloc (inname_len + sizeof ".lock");
|
||
strcpy (lockname, inname);
|
||
strcpy (lockname + inname_len, ".lock");
|
||
for (inname_dirlen = inname_len;
|
||
inname_dirlen && !IS_DIRECTORY_SEP (inname[inname_dirlen - 1]);
|
||
inname_dirlen--)
|
||
continue;
|
||
tempname = xmalloc (inname_dirlen + sizeof "EXXXXXX");
|
||
|
||
while (true)
|
||
{
|
||
/* Create the lock file, but not under the lock file name. */
|
||
/* Give up if cannot do that. */
|
||
|
||
memcpy (tempname, inname, inname_dirlen);
|
||
strcpy (tempname + inname_dirlen, "EXXXXXX");
|
||
desc = mkostemp (tempname, O_BINARY);
|
||
if (desc < 0)
|
||
{
|
||
int mkostemp_errno = errno;
|
||
error ("error while creating what would become the lock file",
|
||
0, 0);
|
||
errno = mkostemp_errno;
|
||
pfatal_with_name (tempname);
|
||
}
|
||
close (desc);
|
||
|
||
tem = link (tempname, lockname);
|
||
|
||
if (tem < 0 && errno != EEXIST)
|
||
pfatal_with_name (lockname);
|
||
|
||
unlink (tempname);
|
||
if (tem >= 0)
|
||
break;
|
||
sleep (1);
|
||
|
||
/* If lock file is five minutes old, unlock it.
|
||
Five minutes should be good enough to cope with crashes
|
||
and wedgitude, and long enough to avoid being fooled
|
||
by time differences between machines. */
|
||
if (stat (lockname, &st) >= 0)
|
||
{
|
||
time_t now = time (0);
|
||
if (st.st_ctime < now - 300)
|
||
{
|
||
unlink (lockname);
|
||
lockname = 0;
|
||
}
|
||
}
|
||
}
|
||
|
||
delete_lockname = lockname;
|
||
#endif /* not MAIL_USE_SYSTEM_LOCK */
|
||
}
|
||
|
||
#ifdef SIGCHLD
|
||
signal (SIGCHLD, SIG_DFL);
|
||
#endif
|
||
|
||
pid_t child = fork ();
|
||
if (child < 0)
|
||
fatal ("Error in fork; %s", strerror (errno), 0);
|
||
|
||
if (child == 0)
|
||
{
|
||
int lockcount = 0;
|
||
int status = 0;
|
||
#if defined (MAIL_USE_MAILLOCK) && defined (HAVE_TOUCHLOCK)
|
||
time_t touched_lock;
|
||
#endif
|
||
|
||
if (setuid (getuid ()) < 0 || setregid (-1, real_gid) < 0)
|
||
fatal ("Failed to drop privileges", 0, 0);
|
||
|
||
#ifdef MAIL_USE_SYSTEM_LOCK
|
||
indesc = open (inname, O_RDWR | O_BINARY);
|
||
#else /* if not MAIL_USE_SYSTEM_LOCK */
|
||
indesc = open (inname, O_RDONLY | O_BINARY);
|
||
#endif /* not MAIL_USE_SYSTEM_LOCK */
|
||
|
||
if (indesc < 0)
|
||
pfatal_with_name (inname);
|
||
|
||
/* Make sure the user can read the output file. */
|
||
umask (umask (0) & 0377);
|
||
|
||
outdesc = open (outname, O_WRONLY | O_BINARY | O_CREAT | O_EXCL, 0666);
|
||
if (outdesc < 0)
|
||
pfatal_with_name (outname);
|
||
|
||
if (setregid (-1, priv_gid) < 0)
|
||
fatal ("Failed to regain privileges", 0, 0);
|
||
|
||
/* This label exists so we can retry locking
|
||
after a delay, if it got EAGAIN or EBUSY. */
|
||
retry_lock:
|
||
|
||
/* Try to lock it. */
|
||
#ifdef MAIL_USE_MAILLOCK
|
||
if (spool_name)
|
||
{
|
||
/* The "-" is to make it a negative number if maillock returns
|
||
non-zero. */
|
||
status = - maillock (spool_name, 1);
|
||
#ifdef HAVE_TOUCHLOCK
|
||
touched_lock = time (0);
|
||
#endif
|
||
lockcount = 5;
|
||
}
|
||
else
|
||
#endif /* MAIL_USE_MAILLOCK */
|
||
{
|
||
#ifdef MAIL_USE_SYSTEM_LOCK
|
||
#ifdef MAIL_USE_LOCKF
|
||
status = lockf (indesc, F_LOCK, 0);
|
||
#else /* not MAIL_USE_LOCKF */
|
||
#ifdef WINDOWSNT
|
||
status = locking (indesc, LK_RLCK, -1L);
|
||
#else
|
||
status = flock (indesc, LOCK_EX);
|
||
#endif
|
||
#endif /* not MAIL_USE_LOCKF */
|
||
#endif /* MAIL_USE_SYSTEM_LOCK */
|
||
}
|
||
|
||
/* If it fails, retry up to 5 times
|
||
for certain failure codes. */
|
||
if (status < 0)
|
||
{
|
||
if (++lockcount <= 5 && (errno == EAGAIN || errno == EBUSY))
|
||
{
|
||
sleep (1);
|
||
goto retry_lock;
|
||
}
|
||
|
||
pfatal_with_name (inname);
|
||
}
|
||
|
||
{
|
||
char buf[1024];
|
||
|
||
while (true)
|
||
{
|
||
nread = read (indesc, buf, sizeof buf);
|
||
if (nread < 0)
|
||
pfatal_with_name (inname);
|
||
if (nread != write (outdesc, buf, nread))
|
||
{
|
||
int saved_errno = errno;
|
||
unlink (outname);
|
||
errno = saved_errno;
|
||
pfatal_with_name (outname);
|
||
}
|
||
if (nread < sizeof buf)
|
||
break;
|
||
#if defined (MAIL_USE_MAILLOCK) && defined (HAVE_TOUCHLOCK)
|
||
if (spool_name)
|
||
{
|
||
time_t now = time (0);
|
||
if (now - touched_lock > 60)
|
||
{
|
||
touchlock ();
|
||
touched_lock = now;
|
||
}
|
||
}
|
||
#endif /* MAIL_USE_MAILLOCK */
|
||
}
|
||
}
|
||
|
||
if (fsync (outdesc) != 0 && errno != EINVAL)
|
||
pfatal_and_delete (outname);
|
||
|
||
/* Prevent symlink attacks truncating other users' mailboxes */
|
||
if (setregid (-1, real_gid) < 0)
|
||
fatal ("Failed to drop privileges", 0, 0);
|
||
|
||
/* Check to make sure no errors before we zap the inbox. */
|
||
if (close (outdesc) != 0)
|
||
pfatal_and_delete (outname);
|
||
|
||
#ifdef MAIL_USE_SYSTEM_LOCK
|
||
if (! preserve_mail)
|
||
{
|
||
if (ftruncate (indesc, 0) != 0)
|
||
pfatal_with_name (inname);
|
||
}
|
||
#endif /* MAIL_USE_SYSTEM_LOCK */
|
||
|
||
close (indesc);
|
||
|
||
#ifndef MAIL_USE_SYSTEM_LOCK
|
||
if (! preserve_mail)
|
||
{
|
||
/* Delete the input file; if we can't, at least get rid of its
|
||
contents. */
|
||
#ifdef MAIL_UNLINK_SPOOL
|
||
/* This is generally bad to do, because it destroys the permissions
|
||
that were set on the file. Better to just empty the file. */
|
||
if (unlink (inname) < 0 && errno != ENOENT)
|
||
#endif /* MAIL_UNLINK_SPOOL */
|
||
creat (inname, 0600);
|
||
}
|
||
#endif /* not MAIL_USE_SYSTEM_LOCK */
|
||
|
||
/* End of mailbox truncation */
|
||
if (setregid (-1, priv_gid) < 0)
|
||
fatal ("Failed to regain privileges", 0, 0);
|
||
|
||
#ifdef MAIL_USE_MAILLOCK
|
||
/* This has to occur in the child, i.e., in the process that
|
||
acquired the lock! */
|
||
if (spool_name)
|
||
mailunlock ();
|
||
#endif
|
||
return EXIT_SUCCESS;
|
||
}
|
||
|
||
if (waitpid (child, &wait_status, 0) < 0)
|
||
fatal ("Error in waitpid; %s", strerror (errno), 0);
|
||
if (!WIFEXITED (wait_status))
|
||
return EXIT_FAILURE;
|
||
else if (WEXITSTATUS (wait_status) != 0)
|
||
return WEXITSTATUS (wait_status);
|
||
|
||
if (lockname)
|
||
unlink (lockname);
|
||
|
||
#endif /* ! DISABLE_DIRECT_ACCESS */
|
||
|
||
return EXIT_SUCCESS;
|
||
}
|
||
|
||
#ifdef MAIL_USE_MAILLOCK
|
||
/* This function uses stat to confirm that the mail directory is
|
||
identical to the directory of the input file, rather than just
|
||
string-comparing the two paths, because one or both of them might
|
||
be symbolic links pointing to some other directory. */
|
||
static char *
|
||
mail_spool_name (char *inname)
|
||
{
|
||
struct stat stat1, stat2;
|
||
char *indir, *fname;
|
||
int status;
|
||
|
||
if (! (fname = strrchr (inname, '/')))
|
||
return NULL;
|
||
|
||
fname++;
|
||
|
||
if (stat (MAILDIR, &stat1) < 0)
|
||
return NULL;
|
||
|
||
indir = xmalloc (fname - inname + 1);
|
||
memcpy (indir, inname, fname - inname);
|
||
indir[fname-inname] = '\0';
|
||
|
||
|
||
status = stat (indir, &stat2);
|
||
|
||
free (indir);
|
||
|
||
if (status < 0)
|
||
return NULL;
|
||
|
||
if (stat1.st_dev == stat2.st_dev
|
||
&& stat1.st_ino == stat2.st_ino)
|
||
return fname;
|
||
|
||
return NULL;
|
||
}
|
||
#endif /* MAIL_USE_MAILLOCK */
|
||
|
||
/* Print error message and exit. */
|
||
|
||
static void
|
||
fatal (const char *s1, const char *s2, const char *s3)
|
||
{
|
||
if (delete_lockname)
|
||
unlink (delete_lockname);
|
||
error (s1, s2, s3);
|
||
exit (EXIT_FAILURE);
|
||
}
|
||
|
||
/* Print error message. `s1' is printf control string, `s2' and `s3'
|
||
are args for it or null. */
|
||
|
||
static void
|
||
error (const char *s1, const char *s2, const char *s3)
|
||
{
|
||
fprintf (stderr, "movemail: ");
|
||
if (s3)
|
||
fprintf (stderr, s1, s2, s3);
|
||
else if (s2)
|
||
fprintf (stderr, s1, s2);
|
||
else
|
||
fprintf (stderr, "%s", s1);
|
||
fprintf (stderr, "\n");
|
||
}
|
||
|
||
static void
|
||
pfatal_with_name (char *name)
|
||
{
|
||
fatal ("%s for %s", strerror (errno), name);
|
||
}
|
||
|
||
static void
|
||
pfatal_and_delete (char *name)
|
||
{
|
||
char *s = strerror (errno);
|
||
unlink (name);
|
||
fatal ("%s for %s", s, name);
|
||
}
|
||
|
||
/* This is the guts of the interface to the Post Office Protocol. */
|
||
|
||
#ifdef MAIL_USE_POP
|
||
|
||
#ifndef WINDOWSNT
|
||
#include <sys/socket.h>
|
||
#include <netinet/in.h>
|
||
#include <netdb.h>
|
||
#else
|
||
#undef _WINSOCKAPI_
|
||
#include <winsock.h>
|
||
#endif
|
||
#include <pwd.h>
|
||
#include <string.h>
|
||
|
||
/*
|
||
* The full valid syntax for a POP mailbox specification for movemail
|
||
* is "po:username:hostname". The ":hostname" is optional; if it is
|
||
* omitted, the MAILHOST environment variable will be consulted. Note
|
||
* that by the time popmail() is called the "po:" has been stripped
|
||
* off of the front of the mailbox name.
|
||
*
|
||
* If the mailbox is in the form "po:username:hostname", then it is
|
||
* modified by this function -- the second colon is replaced by a
|
||
* null.
|
||
*
|
||
* Return a value suitable for passing to `exit'.
|
||
*/
|
||
|
||
static int
|
||
popmail (char *mailbox, char *outfile, bool preserve, char *password,
|
||
bool reverse_order)
|
||
{
|
||
int nmsgs, nbytes;
|
||
int i;
|
||
int mbfi;
|
||
FILE *mbf;
|
||
popserver server;
|
||
int start, end, increment;
|
||
char *user, *hostname;
|
||
|
||
user = mailbox;
|
||
if ((hostname = strchr (mailbox, ':')))
|
||
*hostname++ = '\0';
|
||
|
||
server = pop_open (hostname, user, password, POP_NO_GETPASS);
|
||
if (! server)
|
||
{
|
||
error ("Error connecting to POP server: %s", pop_error, 0);
|
||
return EXIT_FAILURE;
|
||
}
|
||
|
||
if (pop_stat (server, &nmsgs, &nbytes))
|
||
{
|
||
error ("Error getting message count from POP server: %s", pop_error, 0);
|
||
return EXIT_FAILURE;
|
||
}
|
||
|
||
if (!nmsgs)
|
||
{
|
||
pop_close (server);
|
||
return EXIT_SUCCESS;
|
||
}
|
||
|
||
mbfi = open (outfile, O_WRONLY | O_BINARY | O_CREAT | O_EXCL, 0666);
|
||
if (mbfi < 0)
|
||
{
|
||
pop_close (server);
|
||
error ("Error in open: %s, %s", strerror (errno), outfile);
|
||
return EXIT_FAILURE;
|
||
}
|
||
|
||
if (fchown (mbfi, getuid (), -1) != 0)
|
||
{
|
||
int fchown_errno = errno;
|
||
struct stat st;
|
||
if (fstat (mbfi, &st) != 0 || st.st_uid != getuid ())
|
||
{
|
||
pop_close (server);
|
||
error ("Error in fchown: %s, %s", strerror (fchown_errno), outfile);
|
||
return EXIT_FAILURE;
|
||
}
|
||
}
|
||
|
||
mbf = fdopen (mbfi, "wb");
|
||
if (!mbf)
|
||
{
|
||
pop_close (server);
|
||
error ("Error in fdopen: %s", strerror (errno), 0);
|
||
close (mbfi);
|
||
unlink (outfile);
|
||
return EXIT_FAILURE;
|
||
}
|
||
|
||
if (reverse_order)
|
||
{
|
||
start = nmsgs;
|
||
end = 1;
|
||
increment = -1;
|
||
}
|
||
else
|
||
{
|
||
start = 1;
|
||
end = nmsgs;
|
||
increment = 1;
|
||
}
|
||
|
||
for (i = start; i * increment <= end * increment; i += increment)
|
||
if (! (mbx_delimit_begin (mbf)
|
||
&& pop_retr (server, i, mbf)
|
||
&& mbx_delimit_end (mbf)
|
||
&& fflush (mbf) == 0))
|
||
{
|
||
if (errno)
|
||
error ("Error in POP retrieving: %s", strerror (errno), 0);
|
||
pop_close (server);
|
||
fclose (mbf);
|
||
return EXIT_FAILURE;
|
||
}
|
||
|
||
if (fsync (mbfi) != 0 && errno != EINVAL)
|
||
{
|
||
error ("Error in fsync: %s", strerror (errno), 0);
|
||
fclose (mbf);
|
||
return EXIT_FAILURE;
|
||
}
|
||
|
||
if (fclose (mbf) != 0)
|
||
{
|
||
error ("Error in fclose: %s", strerror (errno), 0);
|
||
return EXIT_FAILURE;
|
||
}
|
||
|
||
if (! preserve)
|
||
for (i = 1; i <= nmsgs; i++)
|
||
{
|
||
if (pop_delete (server, i))
|
||
{
|
||
error ("Error from POP server: %s", pop_error, 0);
|
||
pop_close (server);
|
||
return EXIT_FAILURE;
|
||
}
|
||
}
|
||
|
||
if (pop_quit (server))
|
||
{
|
||
error ("Error from POP server: %s", pop_error, 0);
|
||
return EXIT_FAILURE;
|
||
}
|
||
|
||
return EXIT_SUCCESS;
|
||
}
|
||
|
||
static bool
|
||
pop_retr (popserver server, int msgno, FILE *arg)
|
||
{
|
||
char *line;
|
||
int ret;
|
||
|
||
if (pop_retrieve_first (server, msgno, &line))
|
||
{
|
||
error ("Error from POP server: %s", pop_error, 0);
|
||
errno = 0;
|
||
return false;
|
||
}
|
||
|
||
while ((ret = pop_retrieve_next (server, &line)) >= 0)
|
||
{
|
||
if (! line)
|
||
break;
|
||
|
||
if (! mbx_write (line, ret, arg))
|
||
{
|
||
int write_errno = errno;
|
||
pop_close (server);
|
||
errno = write_errno;
|
||
return false;
|
||
}
|
||
}
|
||
|
||
if (ret)
|
||
{
|
||
error ("Error from POP server: %s", pop_error, 0);
|
||
errno = 0;
|
||
return false;
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
static bool
|
||
mbx_write (char *line, int len, FILE *mbf)
|
||
{
|
||
#ifdef MOVEMAIL_QUOTE_POP_FROM_LINES
|
||
/* Do this as a macro instead of using strcmp to save on execution time. */
|
||
# define IS_FROM_LINE(a) ((a[0] == 'F') \
|
||
&& (a[1] == 'r') \
|
||
&& (a[2] == 'o') \
|
||
&& (a[3] == 'm') \
|
||
&& (a[4] == ' '))
|
||
if (IS_FROM_LINE (line))
|
||
{
|
||
if (fputc ('>', mbf) < 0)
|
||
return false;
|
||
}
|
||
#endif
|
||
if (line[0] == '\037')
|
||
{
|
||
if (fputs ("^_", mbf) < 0)
|
||
return false;
|
||
line++;
|
||
len--;
|
||
}
|
||
return fwrite (line, 1, len, mbf) == len && 0 <= fputc ('\n', mbf);
|
||
}
|
||
|
||
#ifdef WINDOWSNT
|
||
/* Work around MS-Windows lack of support for %e or %T with a
|
||
special-purpose strftime that assumes the exact format that
|
||
movemail uses. */
|
||
static size_t
|
||
movemail_strftime (char *s, size_t size, char const *format,
|
||
struct tm const *tm)
|
||
{
|
||
char fmt[size + 6], *q;
|
||
const char *p;
|
||
|
||
for (p = format, q = &fmt[0]; *p; )
|
||
{
|
||
if (*p == '%' && p[1] == 'e')
|
||
{
|
||
memcpy (q, "%d", 2);
|
||
q += 2;
|
||
p += 2;
|
||
}
|
||
else if (*p == '%' && p[1] == 'T')
|
||
{
|
||
memcpy (q, "%H:%M:%S", 8);
|
||
q += 8;
|
||
p += 2;
|
||
}
|
||
else if (*p == '%' && p[1] == '%')
|
||
{
|
||
memcpy (q, p, 2);
|
||
q += 2;
|
||
p += 2;
|
||
}
|
||
else
|
||
*q++ = *p++;
|
||
}
|
||
|
||
size_t n = strftime (s, size, fmt, tm);
|
||
char *mday = s + sizeof "From movemail Sun Jan " - 1;
|
||
if (*mday == '0')
|
||
*mday = ' ';
|
||
return n;
|
||
}
|
||
# undef strftime
|
||
# define strftime movemail_strftime
|
||
#endif
|
||
|
||
static bool
|
||
mbx_delimit_begin (FILE *mbf)
|
||
{
|
||
time_t now = time (NULL);
|
||
struct tm *ltime = localtime (&now);
|
||
if (!ltime)
|
||
return false;
|
||
|
||
char fromline[100];
|
||
if (! strftime (fromline, sizeof fromline,
|
||
"From movemail %a %b %e %T %Y\n", ltime))
|
||
{
|
||
errno = EOVERFLOW;
|
||
return false;
|
||
}
|
||
return 0 <= fputs (fromline, mbf);
|
||
}
|
||
|
||
static bool
|
||
mbx_delimit_end (FILE *mbf)
|
||
{
|
||
return 0 <= putc ('\n', mbf);
|
||
}
|
||
|
||
#endif /* MAIL_USE_POP */
|