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/* GNU Mailutils -- a suite of utilities for electronic mail
Copyright (C) 2007 Free Software Foundation, Inc.
GNU Mailutils 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, or (at your option)
any later version.
GNU Mailutils 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 Mailutils; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
MA 02110-1301 USA */
#include "maidag.h"
void
close_fds ()
{
int i;
long fdlimit = MAXFD;
#if defined (HAVE_SYSCONF) && defined (_SC_OPEN_MAX)
fdlimit = sysconf (_SC_OPEN_MAX);
#elif defined (HAVE_GETDTABLESIZE)
fdlimit = getdtablesize ();
#endif
for (i = 3; i < fdlimit; i++)
close (i);
}
int
switch_user_id (struct mu_auth_data *auth, int user)
{
int rc;
uid_t uid;
if (!auth || auth->change_uid == 0)
return 0;
if (user)
uid = auth->uid;
else
uid = 0;
#if defined(HAVE_SETREUID)
rc = setreuid (0, uid);
#elif defined(HAVE_SETRESUID)
rc = setresuid (-1, uid, -1);
#elif defined(HAVE_SETEUID)
rc = seteuid (uid);
#else
# error "No way to reset user privileges?"
#endif
if (rc < 0)
maidag_error ("setreuid(0, %d): %s (r=%d, e=%d)",
uid, strerror (errno), getuid (), geteuid ());
return rc;
}
void
maidag_error (const char *fmt, ...)
{
va_list ap;
guess_retval (errno);
va_start (ap, fmt);
if (log_to_stderr)
{
vfprintf (stderr, fmt, ap);
fputc ('\n', stderr);
}
mu_verror (fmt, ap);
va_end (ap);
}
int temp_errors[] = {
#ifdef EAGAIN
EAGAIN, /* Try again */
#endif
#ifdef EBUSY
EBUSY, /* Device or resource busy */
#endif
#ifdef EPROCLIM
EPROCLIM, /* Too many processes */
#endif
#ifdef EUSERS
EUSERS, /* Too many users */
#endif
#ifdef ECONNABORTED
ECONNABORTED, /* Software caused connection abort */
#endif
#ifdef ECONNREFUSED
ECONNREFUSED, /* Connection refused */
#endif
#ifdef ECONNRESET
ECONNRESET, /* Connection reset by peer */
#endif
#ifdef EDEADLK
EDEADLK, /* Resource deadlock would occur */
#endif
#ifdef EDEADLOCK
EDEADLOCK, /* Resource deadlock would occur */
#endif
#ifdef EFBIG
EFBIG, /* File too large */
#endif
#ifdef EHOSTDOWN
EHOSTDOWN, /* Host is down */
#endif
#ifdef EHOSTUNREACH
EHOSTUNREACH, /* No route to host */
#endif
#ifdef EMFILE
EMFILE, /* Too many open files */
#endif
#ifdef ENETDOWN
ENETDOWN, /* Network is down */
#endif
#ifdef ENETUNREACH
ENETUNREACH, /* Network is unreachable */
#endif
#ifdef ENETRESET
ENETRESET, /* Network dropped connection because of reset */
#endif
#ifdef ENFILE
ENFILE, /* File table overflow */
#endif
#ifdef ENOBUFS
ENOBUFS, /* No buffer space available */
#endif
#ifdef ENOMEM
ENOMEM, /* Out of memory */
#endif
#ifdef ENOSPC
ENOSPC, /* No space left on device */
#endif
#ifdef EROFS
EROFS, /* Read-only file system */
#endif
#ifdef ESTALE
ESTALE, /* Stale NFS file handle */
#endif
#ifdef ETIMEDOUT
ETIMEDOUT, /* Connection timed out */
#endif
#ifdef EWOULDBLOCK
EWOULDBLOCK, /* Operation would block */
#endif
};
void
guess_retval (int ec)
{
int i;
/* Temporary failures override hard errors. */
if (exit_code == EX_TEMPFAIL)
return;
#ifdef EDQUOT
if (ec == EDQUOT)
{
exit_code = EX_QUOTA();
return;
}
#endif
for (i = 0; i < sizeof (temp_errors)/sizeof (temp_errors[0]); i++)
if (temp_errors[i] == ec)
{
exit_code = EX_TEMPFAIL;
return;
}
exit_code = EX_UNAVAILABLE;
}
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