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/* send-mail.c - Invoke sendmail or other delivery tool.
* Copyright (C) 2016 g10 Code GmbH
* Copyright (C) 2016 Bundesamt für Sicherheit in der Informationstechnik
*
* This file is part of GnuPG.
*
* This file is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This file 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, see <https://www.gnu.org/licenses/>.
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h> /* for X_OK */
#include "../common/util.h"
#include "../common/exectool.h"
#include "../common/sysutils.h"
#include "send-mail.h"
static gpg_error_t
run_sendmail (estream_t data)
{
gpg_error_t err;
const char pgmname[] = NAME_OF_SENDMAIL;
const char *argv[3];
if (!*pgmname || gnupg_access (pgmname, X_OK))
{
log_error ("sendmail tool '%s' is not correctly installed\n", pgmname);
return gpg_error (GPG_ERR_ENOENT);
}
argv[0] = "-oi";
argv[1] = "-t";
argv[2] = NULL;
err = gnupg_exec_tool_stream (pgmname, argv, data, NULL, NULL, NULL, NULL);
if (err)
log_error ("running '%s' failed: %s\n", pgmname, gpg_strerror (err));
return err;
}
/* Send the data in FP as mail. */
gpg_error_t
send_mail (estream_t fp)
{
return run_sendmail (fp);
}
/* Convenience function to write a mail to a named file. */
gpg_error_t
send_mail_to_file (estream_t fp, const char *fname)
{
gpg_error_t err;
estream_t outfp = NULL;
char *buffer = NULL;
size_t buffersize = 32 * 1024;
size_t nbytes, nwritten;
if (!fname)
fname = "-";
buffer = xtrymalloc (buffersize);
if (!buffer)
return gpg_error_from_syserror ();
if (!strcmp (fname,"-"))
{
outfp = es_stdout;
es_set_binary (es_stdout);
}
else
{
outfp = es_fopen (fname, "wb");
if (!outfp)
{
err = gpg_error_from_syserror ();
log_error ("error creating '%s': %s\n", fname, gpg_strerror (err));
goto leave;
}
}
for (;;)
{
if (es_read (fp, buffer, sizeof buffer, &nbytes))
{
err = gpg_error_from_syserror ();
log_error ("error reading '%s': %s\n",
es_fname_get (fp), gpg_strerror (err));
goto leave;
}
if (!nbytes)
{
err = 0;
break; /* Ready. */
}
if (es_write (outfp, buffer, nbytes, &nwritten))
{
err = gpg_error_from_syserror ();
log_error ("error writing '%s': %s\n", fname, gpg_strerror (err));
goto leave;
}
else if (nwritten != nbytes)
{
err = gpg_error (GPG_ERR_EIO);
log_error ("error writing '%s': %s\n", fname, "short write");
goto leave;
}
}
leave:
if (err)
{
if (outfp && outfp != es_stdout)
{
es_fclose (outfp);
gnupg_remove (fname);
}
}
else if (outfp && outfp != es_stdout && es_fclose (outfp))
{
err = gpg_error_from_syserror ();
log_error ("error closing '%s': %s\n", fname, gpg_strerror (err));
}
xfree (buffer);
return err;
}
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