along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- $Id: process.c,v 1.1.2.7 2000/11/20 23:29:47 guus Exp $
+ $Id: process.c,v 1.1.2.15 2000/11/25 13:33:33 guus Exp $
*/
#include "config.h"
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/wait.h>
+#include <stdlib.h>
#include <unistd.h>
+#include <termios.h>
#include <list.h>
#include <pidfile.h>
#include "conf.h"
#include "process.h"
+#include "subnet.h"
+#include "connection.h"
#include "system.h"
-/* A list containing all our children */
-list_t *child_pids = NULL;
-
/* If zero, don't detach from the terminal. */
int do_detach = 1;
-static pid_t ppid;
-
extern char *identname;
extern char *pidfilename;
extern char **g_argv;
-void init_processes(void)
-{
-cp
- child_pids = list_new();
-cp
-}
-
void memory_full(int size)
{
syslog(LOG_ERR, _("Memory exhausted (couldn't allocate %d bytes), exiting."), size);
exit(1);
}
+/* Some functions the less gifted operating systems might lack... */
+
+#ifndef HAVE_FCLOSEALL
+int fcloseall(void)
+{
+ fflush(stdin);
+ fflush(stdout);
+ fflush(stderr);
+ fclose(stdin);
+ fclose(stdout);
+ fclose(stderr);
+}
+#endif
+
/*
Close network connections, and terminate neatly
*/
syslog(LOG_INFO, _("Total bytes written: tap %d, socket %d; bytes read: tap %d, socket %d"),
total_tap_out, total_socket_out, total_tap_in, total_socket_in);
+ syslog(LOG_NOTICE, _("Terminating"));
+
closelog();
- kill(ppid, SIGTERM);
exit(c);
}
*/
int detach(void)
{
- int fd;
- pid_t pid;
cp
setup_signals();
+ /* First check if we can open a fresh new pidfile */
+
if(write_pidfile())
return -1;
+ /* If we succeeded in doing that, detach */
+
if(do_detach)
- daemon(0, 0);
+ {
+ if(daemon(0, 0) < 0)
+ return -1;
+
+ /* Now UPDATE the pid in the pidfile, because we changed it... */
+
+ if(!write_pid(pidfilename))
+ return 1;
+ }
openlog(identname, LOG_CONS | LOG_PID, LOG_DAEMON);
void _execute_script(const char *name) __attribute__ ((noreturn));
void _execute_script(const char *name)
{
- int error = 0;
char *scriptname;
char *s;
cp
}
#endif
- if(chdir(confbase) < 0)
- /* This cannot fail since we already read config files from this
- directory. - Guus */
- /* Yes this can fail, somebody could have removed this directory
- when we didn't pay attention. - Ivo */
- {
- if(chdir("/") < 0)
- /* Now if THIS fails, something wicked is going on. - Ivo */
- syslog(LOG_ERR, _("Couldn't chdir to `/': %m"));
-
- /* Continue anyway. */
- }
+ chdir("/");
asprintf(&scriptname, "%s/%s", confbase, name);
/* Close all file descriptors */
- closelog();
+ closelog(); /* <- this means we cannot use syslog() here anymore! */
fcloseall();
- /* Open standard input */
- if(open("/dev/null", O_RDONLY) < 0)
- {
- syslog(LOG_ERR, _("Opening `/dev/null' failed: %m"));
- error = 1;
- }
-
- if(!error)
- {
- /* Standard output directly goes to syslog */
- openlog(name, LOG_CONS | LOG_PID, LOG_DAEMON);
- /* Standard error as well */
- if(dup2(1, 2) < 0)
- {
- syslog(LOG_ERR, _("System call `%s' failed: %m"),
- "dup2");
- error = 1;
- }
- }
-
- if(error && debug_lvl > 1)
- syslog(LOG_INFO, _("This means that any output the script generates will not be shown in syslog."));
-
execl(scriptname, NULL);
/* No return on success */
- if(errno != ENOENT) /* Ignore if the file does not exist */
- syslog(LOG_WARNING, _("Error executing `%s': %m"), scriptname);
-
- /* No need to free things */
- exit(0);
+ if(errno != ENOENT) /* Ignore if the file does not exist */
+ exit(-1); /* Some error while trying execl(). */
+ else
+ exit(0);
}
/*
int execute_script(const char *name)
{
pid_t pid;
+ int status;
cp
if((pid = fork()) < 0)
{
if(pid)
{
- list_append(child_pids, &pid);
- return 0;
+ if(debug_lvl >= DEBUG_STATUS)
+ syslog(LOG_INFO, _("Executing script %s"), name);
+
+ if(waitpid(pid, &status, 0) == pid)
+ {
+ if(WIFEXITED(status)) /* Child exited by itself */
+ {
+ if(WEXITSTATUS(status))
+ {
+ syslog(LOG_ERR, _("Process %d (%s) exited with non-zero status %d"), pid, name, WEXITSTATUS(status));
+ return -1;
+ }
+ else
+ return 0;
+ }
+ else if(WIFSIGNALED(status)) /* Child was killed by a signal */
+ {
+ syslog(LOG_ERR, _("Process %d (%s) was killed by signal %d (%s)"),
+ pid, name, WTERMSIG(status), strsignal(WTERMSIG(status)));
+ return -1;
+ }
+ else /* Something strange happened */
+ {
+ syslog(LOG_ERR, _("Process %d (%s) terminated abnormaly"), pid, name);
+ return -1;
+ }
+ }
+ else
+ {
+ syslog(LOG_ERR, _("System call `%s' failed: %m"), "waitpid");
+ return -1;
+ }
}
cp
/* Child here */
- _execute_script(name);
-}
-
-/*
- Check a child (the pointer data is actually an integer, the PID of
- that child. A non-zero return value means that the child has exited
- and can be removed from our list.
-*/
-int check_child(void *data)
-{
- pid_t pid;
- int status;
-cp
- pid = (pid_t) data;
- pid = waitpid(pid, &status, WNOHANG);
- if(WIFEXITED(status))
- {
- if(WIFSIGNALED(status)) /* Child was killed by a signal */
- {
- syslog(LOG_ERR, _("Child with PID %d was killed by signal %d (%s)"),
- pid, WTERMSIG(status), strsignal(WTERMSIG(status)));
- return -1;
- }
- if(WEXITSTATUS(status) != 0)
- {
- syslog(LOG_INFO, _("Child with PID %d exited with code %d"),
- WEXITSTATUS(status));
- }
- return -1;
- }
-cp
- /* Child is still running */
- return 0;
-}
-/*
- Check the status of all our children.
-*/
-void check_children(void)
-{
- list_forall_nodes(child_pids, check_child);
+ _execute_script(name);
}
-
/*
Signal handlers.
*/
sigsegv_square(int a)
{
syslog(LOG_ERR, _("Got another SEGV signal: not restarting"));
+ cp_trace();
exit(0);
}
signal(SIGUSR2, sigusr2_handler);
signal(SIGCHLD, SIG_IGN);
}
-
-RETSIGTYPE parent_exit(int a)
-{
- exit(0);
-}
projects / tinc / blobdiff