void sig_all_default(void)
{
int i;
for (i = 1; i < SIGMAX; i++)
if (i != SIGPROF || i != SIGSEGV)
sig_default(i);
}
static
void
child_exec(int which)
{
pid_t pid = 0;
tain_t now;
tain_t when_ok;
char **argv = deux[which].argv;
tain_now(&now);
tain_load(&when_ok, 1, 0);
tain_plus(&when_ok, &deux[which].when, &when_ok);
if(tain_less(&now, &when_ok)){
warn("pausing for respawn of ", argv[0], " ...");
sleep(1);
}
/* if option -x:
** not supervising, don't fork here, just exec into deux[1]
*/
if(opt_super ? 1 : (which == 0)){
while((pid = fork()) == -1){
warn("failure on fork() while starting ", argv[0]);
sleep(2);
}
}
/* child (or, if not opt_super, execing into deux[1]): */
if(pid == 0){
/* setup logpipe: */
fd_dupe(which, my_logpipe[which]);
close(my_logpipe[0]);
close(my_logpipe[1]);
#if 0
if(which == 1){
/* redirect stderr to stdout for program: */
fd_dupe(2, 1);
}
#endif
/* reset default signal handlers, unblock: */
sig_default(SIGTERM);
sig_default(SIGCHLD);
sig_default(SIGALRM);
sig_default(SIGCONT);
sig_default(SIGHUP);
sig_default(SIGINT);
sig_default(SIGQUIT);
sig_default(SIGTSTP);
sig_default(SIGUSR1);
sig_default(SIGUSR2);
sig_default(SIGPIPE);
sigset_unblock(&my_sigset);
/* do it: */
execvx(argv[0], argv, environ, NULL);
/* uh oh: */
fatal_syserr("failure on exec of ", argv[0]);
}
/* parent: */
deux[which].pid = pid;
tain_now(&deux[which].when);
return;
}
static
void
child_exec(int which)
{
pid_t pid = 0;
tain_t now;
tain_t when_ok;
char **argv = deux[which].argv;
tain_now(&now);
tain_load(&when_ok, 1, 0);
tain_plus(&when_ok, &deux[which].when, &when_ok);
if(tain_less(&now, &when_ok)){
warn("pausing for restart of ", argv[0], " ...");
sleep(1);
}
/* if option -x:
** not supervising, don't fork here, just exec into deux[1]
*/
if(opt_super ? 1 : (which == 0)){
while((pid = fork()) == -1){
warn("failure on fork() while starting ", argv[0]);
sleep(2);
}
}
/* child (or, if not opt_super, execing into deux[1]): */
if(pid == 0){
int fd, fd_max;
struct rlimit rlim;
int i;
/* setup PERP_BASE in environment: */
if(newenv_set("PERP_BASE", perp_base) == -1){
fatal_syserr("failure setting environment in child for ", argv[0]);
}
/* prepare for closing unused file descriptors: */
if(getrlimit(RLIMIT_NOFILE, &rlim) == -1){
fatal_syserr("failure getting file rlimit in child for ", argv[0]);
}
fd_max = (rlim.rlim_max == RLIM_INFINITY) ? 1024 : rlim.rlim_max;
/* start fd 0,1,2 on /dev/null: */
if((fd = open("/dev/null", O_RDWR)) == -1){
fatal_syserr("failure opening /dev/null in child for ", argv[0]);
}
fd_dupe(0, fd); fd_dupe(1, fd); fd_dupe(2, fd);
close(fd);
/* setup logpipe: */
fd_dupe(which, my_logpipe[which]);
if(which == 1){
/* perpd gets stderr redirected to stdout for logger: */
fd_dupe(2, 1);
}
/* close all other descriptors: */
for(i = 3; i < fd_max; ++i) close(i);
/* set default umask: */
umask(0);
/* reset default signal handlers, unblock: */
sig_default(SIGTERM);
sig_default(SIGCHLD);
sig_default(SIGALRM);
sig_default(SIGCONT);
sig_default(SIGHUP);
sig_default(SIGINT);
sig_default(SIGQUIT);
sig_default(SIGTSTP);
sig_default(SIGUSR1);
sig_default(SIGUSR2);
sig_default(SIGPIPE);
sigset_unblock(&my_sigset);
/* do it: */
newenv_run(argv, environ);
/* uh oh: */
fatal_syserr("failure on exec of ", argv[0]);
}
/* parent: */
deux[which].pid = pid;
tain_now(&deux[which].when);
return;
}
