static void __init create_pid_file(void) { char file[strlen(uml_dir) + UMID_LEN + sizeof("/pid\0")]; char pid[sizeof("nnnnn\0")]; int fd, n; if(umid_file_name("pid", file, sizeof(file))) return; fd = open(file, O_RDWR | O_CREAT | O_EXCL, 0644); if(fd < 0){ printk("Open of machine pid file \"%s\" failed: %s\n", file, strerror(errno)); return; } snprintf(pid, sizeof(pid), "%d\n", getpid()); n = write(fd, pid, strlen(pid)); if(n != strlen(pid)) printk("Write of pid file failed - err = %d\n", errno); close(fd); }
static int __init create_pid_file(void) { char file[strlen(uml_dir) + UMID_LEN + sizeof("/pid\0")]; char pid[sizeof("nnnnn\0")]; int fd, n; if(umid_file_name("pid", file, sizeof(file))) return 0; fd = os_open_file(file, of_create(of_excl(of_rdwr(OPENFLAGS()))), 0644); if(fd < 0){ printf("Open of machine pid file \"%s\" failed: %s\n", file, strerror(-fd)); return 0; } sprintf(pid, "%d\n", os_getpid()); n = os_write_file(fd, pid, strlen(pid)); if(n != strlen(pid)) printf("Write of pid file failed - err = %d\n", -n); os_close_file(fd); return 0; }