int main()
{
int port = get_port(12123);
parent = getpid();
child = fork();
if (child == -1)
{
fprintf(stderr, "can't fork, error %d\n", errno);
exit(EXIT_FAILURE);
}
if (child == 0)
{
childproc(port);
_exit(0);
}
else
{
int ret = parentproc(port);
if(1 == session_closed_called && 0 == ret)
exit(0);
else
exit(ret ? ret : 21);
}
return 1;
}
int
main()
{
port = get_port(11123);
parent = getpid();
child = fork();
if (-1 == child)
{
fprintf(stderr, "can't fork, error %d\n", errno);
exit(EXIT_FAILURE);
}
if (child == 0)
{
int ret = childproc();
_exit(ret);
}
else
{
int ret = parentproc();
exit(ret);
}
return 1;
}
int main(void)
{
int i, cpid;
//create 5 child process
for(i=0; i<5; i++)
{
cpid = fork();
if(cpid < 0)
printf("fork failed\n");
else if(cpid == 0)//child process
childproc();
}
for(i=0; i<5; i++)
wait(NULL);
exit(0);
}
void*
oscmd(char **args, int nice, char *dir, int *fd)
{
Targ *t;
int r, fd0[2], fd1[2], fd2[2], wfd[2], n, pid;
t = mallocz(sizeof(*t), 1);
if(t == nil)
return nil;
fd0[0] = fd0[1] = -1;
fd1[0] = fd1[1] = -1;
fd2[0] = fd2[1] = -1;
wfd[0] = wfd[1] = -1;
if(pipe(fd0) < 0 || pipe(fd1) < 0 || pipe(fd2) < 0 || pipe(wfd) < 0)
goto Error;
if(fcntl(wfd[1], F_SETFD, FD_CLOEXEC) < 0) /* close on exec to give end of file on success */
goto Error;
t->fd[0] = fd0[0];
t->fd[1] = fd1[1];
t->fd[2] = fd2[1];
t->wfd = wfd[1];
t->args = args;
t->dir = dir;
t->gid = up->env->gid;
if(t->gid == -1)
t->gid = gidnobody;
t->uid = up->env->uid;
if(t->uid == -1)
t->uid = uidnobody;
signal(SIGCHLD, SIG_DFL);
switch(pid = fork()) {
case -1:
goto Error;
case 0:
setpgrp();
if(nice)
setpriority(PRIO_PROCESS, 0, 19);
childproc(t);
_exit(1);
default:
t->pid = pid;
if(Debug)
print("cmd pid %d\n", t->pid);
break;
}
close(fd0[0]);
close(fd1[1]);
close(fd2[1]);
close(wfd[1]);
n = read(wfd[0], up->genbuf, sizeof(up->genbuf)-1);
close(wfd[0]);
if(n > 0){
close(fd0[1]);
close(fd1[0]);
close(fd2[0]);
free(t);
up->genbuf[n] = 0;
if(Debug)
print("oscmd: bad exec: %q\n", up->genbuf);
error(up->genbuf);
return nil;
}
fd[0] = fd0[1];
fd[1] = fd1[0];
fd[2] = fd2[0];
return t;
Error:
r = errno;
if(Debug)
print("oscmd: %q\n",strerror(r));
close(fd0[0]);
close(fd0[1]);
close(fd1[0]);
close(fd1[1]);
close(fd2[0]);
close(fd2[1]);
close(wfd[0]);
close(wfd[1]);
error(strerror(r));
return nil;
}