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/* GNOME remote helper, forks to run imap or pop checks
* (C) 2001 Eazel, Inc.
*
* Author: George Lebl
*
* Utterly ugly, make this use corba at some point in the future.
*/
#include "config.h"
#include <gtk/gtk.h>
#include <libgnome/libgnome.h>
#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/time.h>
#include <sys/wait.h>
#include <signal.h>
#include <errno.h>
#include "popcheck.h"
#include "remote-helper.h"
typedef struct {
pid_t pid;
int fd;
guint timeout;
RemoteHandler handler;
gpointer data;
GDestroyNotify destroy_notify;
} RemoteHandlerData;
static gboolean
try_reading (gpointer data)
{
int retval;
int mails;
RemoteHandlerData *handler = data;
sigset_t mask, omask;
sigemptyset (&mask);
sigaddset (&mask, SIGPIPE);
sigprocmask (SIG_BLOCK, &mask, &omask);
retval = read (handler->fd, &mails, sizeof (mails));
sigprocmask (SIG_SETMASK, &omask, NULL);
if (retval == 0 ||
(retval < 0 && errno == EAGAIN)) {
if (kill (handler->pid, 0) != 0) {
handler->timeout = 0;
helper_whack_handle (handler);
return FALSE;
}
return TRUE;
} else if (retval < 0) {
handler->timeout = 0;
helper_whack_handle (handler);
return FALSE;
}
handler->handler (mails, handler->data);
handler->timeout = 0;
helper_whack_handle (handler);
return FALSE;
}
void
helper_whack_handle (gpointer handle)
{
RemoteHandlerData *handler = handle;
if (handler->fd >= 0)
close (handler->fd);
handler->fd = -1;
if (handler->pid > 0) {
kill (handler->pid, SIGTERM);
}
handler->pid = 0;
if (handler->timeout > 0)
gtk_timeout_remove (handler->timeout);
handler->timeout = 0;
handler->handler = NULL;
if (handler->destroy_notify != NULL)
handler->destroy_notify (handler->data);
handler->data = NULL;
handler->destroy_notify = NULL;
g_free (handler);
}
static RemoteHandlerData *
fork_new_handler (RemoteHandler handler, gpointer data,
GDestroyNotify destroy_notify)
{
pid_t pid;
int fd[2];
RemoteHandlerData *handler_data;
if (pipe (fd) != 0)
return NULL;
handler_data = g_new0 (RemoteHandlerData, 1);
pid = fork ();
if (pid < 0) {
close (fd[0]);
close (fd[1]);
g_free (handler_data);
return NULL;
} else if (pid == 0) {
/*child*/
close (fd[0]);
pid = fork ();
if (pid != 0) {
write (fd[1], &pid, sizeof (pid));
_exit (0);
} else {
handler_data->pid = 0;
handler_data->fd = fd[1];
return handler_data;
}
} else {
/*parent*/
close (fd[1]);
waitpid (pid, 0, 0);
read (fd[0], &pid, sizeof (pid));
if (pid < 0) {
close (fd[0]);
g_free (handler_data);
return NULL;
}
/* set to nonblocking */
fcntl(fd[0], F_SETFL, O_NONBLOCK);
handler_data->pid = pid;
handler_data->fd = fd[0];
handler_data->handler = handler;
handler_data->data = data;
handler_data->destroy_notify = destroy_notify;
handler_data->timeout = gtk_timeout_add (500, try_reading,
handler_data);
return handler_data;
}
}
gpointer
helper_pop3_check (RemoteHandler handler, gpointer data,
GDestroyNotify destroy_notify,
const char *command,
const char *h, const char* n, const char* e)
{
RemoteHandlerData *handler_data;
handler_data = fork_new_handler (handler, data, destroy_notify);
if (handler_data == NULL) {
handler (pop3_check (h, n, e), data);
if (destroy_notify != NULL)
destroy_notify (data);
return NULL;
}
if (handler_data->pid == 0) {
int mails;
if (command != NULL &&
command[0] != '\0')
system (command);
mails = pop3_check (h, n, e);
write (handler_data->fd, &mails, sizeof (mails));
_exit (0);
}
return handler_data;
}
gpointer
helper_imap_check (RemoteHandler handler, gpointer data,
GDestroyNotify destroy_notify,
const char *command,
const char *h, const char* n, const char* e, const char *f)
{
RemoteHandlerData *handler_data;
handler_data = fork_new_handler (handler, data, destroy_notify);
if (handler_data == NULL) {
handler (imap_check (h, n, e, f), data);
return NULL;
}
if (handler_data->pid == 0) {
int mails;
if (command != NULL &&
command[0] != '\0')
system (command);
mails = imap_check (h, n, e, f);
write (handler_data->fd, &mails, sizeof (mails));
_exit (0);
}
return handler_data;
}
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