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/* GNU Mailutils -- a suite of utilities for electronic mail
Copyright (C) 1999-2020 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, see <http://www.gnu.org/licenses/>. */
#include "mail.h"
#if !HAVE_DECL_ENVIRON
extern char **environ;
#endif
/*
* ec[ho] string ...
*/
static int
echo_runcmd (char **ret, const char *str, size_t len, char **argv, void *closure)
{
int rc;
mu_stream_t ps;
mu_stream_t outs;
size_t i;
int status = MU_WRDSE_OK;
char buf[128];
size_t n;
*ret = NULL;
for (i = 0; argv[i]; i++)
;
rc = mu_prog_stream_create (&ps, argv[0], i, argv, 0, NULL, MU_STREAM_READ);
if (rc)
{
mu_error (_("Can't run %s: %s"), argv[0], mu_strerror (rc));
return MU_WRDSE_USERERR;
}
rc = mu_memory_stream_create (&outs, MU_STREAM_RDWR);
if (rc)
{
mu_diag_funcall (MU_DIAG_ERROR, "mu_memory_stream_create", NULL, rc);
mu_stream_destroy (&ps);
return MU_WRDSE_USERERR;
}
while ((rc = mu_stream_read (ps, buf, sizeof (buf), &n)) == 0 && n > 0)
{
int wn = mu_stream_write (outs, buf, n, NULL);
if (wn)
{
mu_error (_("error writing to temporary stream: %s"),
mu_strerror (wn));
status = MU_WRDSE_USERERR;
break;
}
}
if (status == MU_WRDSE_OK && rc)
{
mu_error (_("error reading %s output: %s"), argv[0], mu_strerror (rc));
status = MU_WRDSE_USERERR;
}
mu_stream_destroy (&ps);
if (status == MU_WRDSE_OK)
{
mu_off_t size;
char *p;
mu_stream_size (outs, &size);
p = malloc (size + 1);
if (p)
{
mu_stream_seek (outs, 0, MU_SEEK_SET, NULL);
rc = mu_stream_read (outs, p, size, NULL);
if (rc == 0)
{
p[size] = 0;
*ret = p;
}
else
{
free (p);
mu_error (_("error reading from temporary stream: %s"),
mu_strerror (rc));
status = MU_WRDSE_USERERR;
}
}
else
status = MU_WRDSE_NOSPACE;
}
mu_stream_destroy (&outs);
return status;
}
static int
echo (char *s, int *nl)
{
int rc;
struct mu_wordsplit ws;
int wsflags = MU_WRDSF_NOSPLIT | MU_WRDSF_QUOTE | MU_WRDSF_ENV;
size_t len;
ws.ws_env = (const char **) environ;
ws.ws_command = echo_runcmd;
rc = mu_wordsplit (s, &ws, wsflags);
switch (rc)
{
case MU_WRDSE_OK:
break;
case MU_WRDSE_USERERR:
/* error message already displayed */
mu_wordsplit_free (&ws);
return 1;
default:
mu_error ("%s", mu_wordsplit_strerror (&ws));
mu_wordsplit_free (&ws);
return 1;
}
len = strlen (ws.ws_wordv[0]);
mu_stream_write (mu_strout, ws.ws_wordv[0], len, NULL);
*nl = len > 0 && ws.ws_wordv[0][len-1] == '\n';
mu_wordsplit_free (&ws);
return 0;
}
int
mail_echo (int argc, char **argv)
{
if (argc > 1)
{
int i;
int nl = 0;
for (i = 1; i < argc; i++)
{
if (i > 1)
mu_printf (" ");
if (echo (argv[i], &nl))
break;
}
if (!nl)
mu_printf ("\n");
}
return 0;
}
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