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/*++
/* NAME
/* mail_trigger 3
/* SUMMARY
/* trigger a mail service
/* SYNOPSIS
/* #include <mail_proto.h>
/*
/* int mail_trigger(class, service, request, length)
/* const char *class;
/* const char *service;
/* const char *request;
/* ssize_t length;
/* DESCRIPTION
/* mail_trigger() wakes up the specified mail subsystem, by
/* sending it the specified request. In the case of non-FIFO
/* server endpoints, a short-running program should invoke
/* event_drain() to ensure proper request delivery.
/*
/* Arguments:
/* .IP class
/* Name of a class of local transport channel endpoints,
/* either \fIpublic\fR (accessible by any local user) or
/* \fIprivate\fR (administrative access only).
/* .IP service
/* The name of a local transport endpoint within the named class.
/* .IP request
/* A string. The list of valid requests is service specific.
/* .IP length
/* The length of the request string.
/* DIAGNOSTICS
/* The result is -1 in case of problems, 0 otherwise.
/* Warnings are logged.
/* BUGS
/* Works with FIFO or UNIX-domain services only.
/*
/* Should use master.cf to find out what transport to use.
/* SEE ALSO
/* fifo_trigger(3) trigger a FIFO-based service
/* unix_trigger(3) trigger a UNIX_domain service
/* LICENSE
/* .ad
/* .fi
/* The Secure Mailer license must be distributed with this software.
/* AUTHOR(S)
/* Wietse Venema
/* IBM T.J. Watson Research
/* P.O. Box 704
/* Yorktown Heights, NY 10598, USA
/*--*/
/* System library. */
#include <sys_defs.h>
#include <sys/stat.h>
/* Utility library. */
#include <msg.h>
#include <mymalloc.h>
#include <iostuff.h>
#include <trigger.h>
#include <warn_stat.h>
/* Global library. */
#include "mail_params.h"
#include "mail_proto.h"
/* mail_trigger - trigger a service */
int mail_trigger(const char *class, const char *service,
const char *req_buf, ssize_t req_len)
{
struct stat st;
char *path;
int status;
/*
* XXX Some systems cannot tell the difference between a named pipe
* (fifo) or a UNIX-domain socket. So we may have to try both.
*/
path = mail_pathname(class, service);
if ((status = stat(path, &st)) < 0) {
msg_warn("unable to look up %s: %m", path);
} else if (S_ISFIFO(st.st_mode)) {
status = fifo_trigger(path, req_buf, req_len, var_trigger_timeout);
if (status < 0 && S_ISSOCK(st.st_mode))
status = LOCAL_TRIGGER(path, req_buf, req_len, var_trigger_timeout);
} else if (S_ISSOCK(st.st_mode)) {
status = LOCAL_TRIGGER(path, req_buf, req_len, var_trigger_timeout);
} else {
msg_warn("%s is not a socket or a fifo", path);
status = -1;
}
myfree(path);
return (status);
}
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