// Email Send Test (using /usr/bin/mail)

// Copyright (C)2020-2024, Philip Munts dba Munts Technologies.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// * Redistributions of source code must retain the above copyright notice,
//   this list of conditions and the following disclaimer.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

void main(int argc, char *argv[])
{
  // Validate parameters

  if (argc != 4)
  {
    puts("\nEmail Send Test\n");
    printf("Usage: %s <recipient> <subject> <message>\n\n", argv[0]);
    exit(1);
  }

  // Build the command string

  char cmdbuf[256];
  memset(cmdbuf, 0 , sizeof(cmdbuf));
  snprintf(cmdbuf, sizeof(cmdbuf) - 1, "/usr/bin/mail -s \"%s\" \"%s\"",
    argv[2], argv[1]);

  // Dispatch the message

  FILE *f = popen(cmdbuf, "w");
  fprintf(f, "%s\n", argv[3]);
  pclose(f);
}