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notify_external.c
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notify_external.c
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/* notify_external.c -- external notification method
*
* Copyright (c) 1994-2010 Carnegie Mellon University. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The name "Carnegie Mellon University" must not be used to
* endorse or promote products derived from this software without
* prior written permission. For permission or any legal
* details, please contact
* Carnegie Mellon University
* Center for Technology Transfer and Enterprise Creation
* 4615 Forbes Avenue
* Suite 302
* Pittsburgh, PA 15213
* (412) 268-7393, fax: (412) 268-7395
* innovation@andrew.cmu.edu
*
* 4. Redistributions of any form whatsoever must retain the following
* acknowledgment:
* "This product includes software developed by Computing Services
* at Carnegie Mellon University (http://www.cmu.edu/computing/)."
*
* CARNEGIE MELLON UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO
* THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS, IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY BE LIABLE
* FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
* AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <config.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <syslog.h>
#include <errno.h>
#include "imap/global.h"
#include "libconfig.h"
#include "notify_external.h"
char* notify_external(const char *class, const char *priority,
const char *user, const char *mailbox,
int nopt __attribute__((unused)),
char **options __attribute__((unused)),
const char *message, const char *fname)
{
const char *notify;
const char *buf[12];
int fds[2], status;
pid_t child_pid;
FILE *stream;
/* check/parse options */
if (!(notify = config_getstring(IMAPOPT_NOTIFY_EXTERNAL))) {
syslog(LOG_ERR, "ERROR: no external recipient (program) specified");
return strdup("NO Recipient unspecified");
}
buf[0] = notify;
buf[1] = "-c";
buf[2] = class;
buf[3] = "-p";
buf[4] = priority;
buf[5] = "-u";
buf[6] = user;
buf[7] = "-m";
buf[8] = mailbox;
buf[9] = "-f";
buf[10] = fname;
buf[11] = NULL;
if (pipe(fds) < 0) {
syslog(LOG_ERR,
"notify_external: pipe() returned %s", strerror(errno));
return strdup("NO notify_external pipe failed");
}
if ((child_pid = fork()) == 0) {
/* i'm the child! run notify */
close(fds[1]);
/* make the pipe be stdin */
dup2(fds[0], STDIN_FILENO);
execv(notify, (char **) buf);
/* should never reach here */
syslog(LOG_ERR, "notify_external: exec returned %s", strerror(errno));
return strdup("NO notify_external exec failed");
}
/* i'm the parent */
close(fds[0]);
stream = fdopen(fds[1], "w");
if (!stream) {
return strdup("NO notify_external could not open stream");
}
fprintf(stream, "%s\n", message);
fclose(stream);
while (waitpid(child_pid, &status, 0) < 0);
return strdup("OK notify_external notification successful");
}

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