minix/test/test67.c

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#include <arpa/inet.h>
#include <netinet/in.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <errno.h>
#include <fcntl.h>
#include <netdb.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
int max_error = 5;
#include "common.h"
#define CLOEXEC_PORT 3490
#define FORK_PORT 3491
static int fd = 0;
void copy_subtests(void);
void test_open_file_cloexec(void);
void test_open_file_fork(void);
void test_open_socket_cloexec(void);
void test_open_socket_fork(void);
void start_socket_server(int port);
int start_socket_client(int port, int flag);
void
copy_subtests()
{
char *subtests[] = { "t67a", "t67b" };
char copy_cmd[8 + PATH_MAX + 1];
int i, no_tests;
no_tests = sizeof(subtests) / sizeof(char *);
for (i = 0; i < no_tests; i++) {
snprintf(copy_cmd, 8 + PATH_MAX, "cp ../%s .", subtests[i]);
system(copy_cmd);
}
}
void
test_open_file_cloexec()
{
int flags;
pid_t pid;
/* Let's create a file with O_CLOEXEC turned on */
fd = open("file", O_RDWR|O_CREAT|O_CLOEXEC, 0660);
if (fd < 0) e(1);
/* Now verify through fcntl the flag is indeed set */
flags = fcntl(fd, F_GETFD);
if (flags < 0) e(2);
if (!(flags & FD_CLOEXEC)) e(3);
/* Fork a child and let child exec a test program that verifies
* fd is not a valid file */
pid = fork();
if (pid == -1) e(4);
else if (pid == 0) {
/* We're the child */
char fd_buf[2];
/* Verify again O_CLOEXEC is on */
flags = fcntl(fd, F_GETFD);
if (flags < 0) e(5);
if (!(flags & FD_CLOEXEC)) e(6);
snprintf(fd_buf, sizeof(fd_buf), "%d", fd);
execl("./t67b", "t67b", fd_buf, NULL);
/* Should not reach this */
exit(1);
} else {
/* We're the parent */
int result;
if (waitpid(pid, &result, 0) == -1) e(7);
if (WEXITSTATUS(result) != 0) e(8);
}
close(fd);
}
void
test_open_file_fork()
{
int flags;
pid_t pid;
/* Let's create a file with O_CLOEXEC NOT turned on */
fd = open("file", O_RDWR|O_CREAT, 0660);
if (fd < 0) e(1);
/* Now verify through fcntl the flag is indeed not set */
flags = fcntl(fd, F_GETFD);
if (flags < 0) e(2);
if (flags & FD_CLOEXEC) e(3);
/* Fork a child and let child exec a test program that verifies
* fd is a valid file */
pid = fork();
if (pid == -1) e(4);
else if (pid == 0) {
/* We're the child */
char fd_buf[2];
/* Verify again O_CLOEXEC is off */
flags = fcntl(fd, F_GETFD);
if (flags < 0) e(5);
if (flags & FD_CLOEXEC) e(6);
snprintf(fd_buf, sizeof(fd_buf), "%d", fd);
execl("./t67a", "t67a", fd_buf, NULL);
/* Should not reach this */
exit(1);
} else {
/* We're the parent */
int result = 0;
if (waitpid(pid, &result, 0) == -1) e(7);
if (WEXITSTATUS(result) != 0) e(8);
}
close(fd);
}
int
start_socket_client(int port, int flag)
{
int fd_sock;
struct hostent *he;
struct sockaddr_in server;
if ((fd_sock = socket(PF_INET, SOCK_STREAM|flag, 0)) < 0) {
perror("Error obtaining socket\n");
e(1);
}
if ((he = gethostbyname("127.0.0.1")) == NULL) {
perror("Error retrieving home\n");
e(2);
}
/* Copy server host result */
memcpy(&server.sin_addr, he->h_addr_list[0], he->h_length);
server.sin_family = AF_INET;
server.sin_port = htons(port);
/* Normally, we'd zerofill sin_zero, but there is no such thing on
* Minix at the moment */
#if !defined(__minix)
memset(&server.sin_zero, '\0', sizeof(server.sin_zero));
#endif
if (connect(fd_sock, (struct sockaddr *) &server, sizeof(server)) < 0){
perror("Error connecting to server\n");
e(3);
}
return fd_sock;
}
void
start_socket_server(int port)
{
#if !defined(__minix)
int yes = 1;
#endif
int fd_sock, fd_new, r;
struct sockaddr_in my_addr;
struct sockaddr_in other_addr;
socklen_t other_size;
char buf[1];
if ((fd_sock = socket(PF_INET, SOCK_STREAM, 0)) < 0) {
perror("Error getting socket\n");
e(1);
}
my_addr.sin_family = AF_INET;
my_addr.sin_port = htons(port);
my_addr.sin_addr.s_addr = INADDR_ANY;
/* Normally we'd zerofill sin_zero, but current Minix socket interface
* does not support that field */
#if !defined(__minix)
memset(&my_addr.sin_zero, '\0', sizeof(sin.sin_zero));
#endif
/* Reuse port number when invoking test often */
#if !defined(__minix)
if (setsockopt(fd_sock, SOL_SOCKET, SO_REUSEADDR, &yes,
sizeof(int)) < 0) {
perror("Error setting port reuse option\n");
e(2);
}
#endif
/* Bind to port */
if (bind(fd_sock, (struct sockaddr *) &my_addr, sizeof(my_addr)) < 0) {
perror("Error binding to port\n");
e(3);
}
/* Set socket in listening mode */
if (listen(fd_sock, 20) < 0) {
perror("Error listening for incoming connections");
e(4);
}
/* Accept incoming connections */
fd_new = accept(fd_sock, (struct sockaddr *) &other_addr, &other_size);
if (fd_new < 0) {
perror("Error accepting new connections\n");
e(5);
}
r = read(fd_new, buf, sizeof(buf));
exit(0);
}
void
test_open_socket_cloexec()
{
/* This subtest will start a server and client using TCP. The client will
* open the socket with SOCK_CLOEXEC turned on, so that after a fork+exec, the
* socket should become invalid.
* o
* / |
* server |
* (accept) |
* | | \
* | | client
* | | (connect)
* | | | \
* | | | client_fork
* | | | (exec t67b)
* (read) | | (write)
* | | | /
* | | (waitpid client_fork)
* \ | |
* (waitpid server) |
* | /
* (waitpid client)
* |
* o
*/
pid_t pid_server, pid_client;
int result;
pid_server = fork();
if (pid_server < 0) e(1);
if (pid_server == 0) {
start_socket_server(CLOEXEC_PORT);
return; /* Never reached */
}
pid_client = fork();
if (pid_client < 0) e(2);
if (pid_client == 0) {
pid_t pid_client_fork;
int sockfd;
sockfd = start_socket_client(CLOEXEC_PORT, SOCK_CLOEXEC);
if (sockfd < 0) e(4);
pid_client_fork = fork();
if (pid_client_fork < 0) {
e(5);
exit(5);
}
if (pid_client_fork == 0) {
/* We're a fork of the client. After we exec, the
* socket should become invalid due to the SOCK_CLOEXEC
* flag.
*/
char sockfd_buf[2];
int flags;
/* Verify O_CLOEXEC is on */
flags = fcntl(sockfd, F_GETFD);
if (flags < 0) e(5);
if (!(flags & FD_CLOEXEC)) e(6);
/* t67b will verify that it can't write to sockfd and
* that opening a new file will yield a file descriptor
* with the same number.
*/
snprintf(sockfd_buf, sizeof(sockfd_buf), "%d", sockfd);
execl("./t67b", "t67b", sockfd_buf, NULL);
/* Should not reach this */
exit(1);
} else {
if (waitpid(pid_client_fork, &result, 0) < 0) e(8);
exit(WEXITSTATUS(result)); /* Pass on error to main */
}
exit(0); /* Never reached */
}
if (waitpid(pid_server, &result, 0) < 0) e(3);
if (waitpid(pid_client, &result, 0) < 0) e(4);
/* Let's inspect client result */
if (WEXITSTATUS(result) != 0) e(5);
}
void
test_open_socket_fork(void)
{
/* This subtest will start a server and client using TCP. The client will
* open the socket with SOCK_CLOEXEC turned off, so that after a fork+exec, the
* socket should stay valid.
* o
* / |
* server |
* (accept) |
* | | \
* | | client
* | | (connect)
* | | | \
* | | | client_fork
* | | | (exec t67a)
* (read) | | (write)
* | | | /
* | | (waitpid client_fork)
* \ | |
* (waitpid server) |
* | /
* (waitpid client)
* |
* o
*/
pid_t pid_server, pid_client;
int result;
pid_server = fork();
if (pid_server < 0) e(1);
if (pid_server == 0) {
start_socket_server(FORK_PORT);
return; /* Never reached */
}
pid_client = fork();
if (pid_client < 0) e(2);
if (pid_client == 0) {
pid_t pid_client_fork;
int sockfd;
sockfd = start_socket_client(FORK_PORT, 0);
if (sockfd < 0) e(4);
pid_client_fork = fork();
if (pid_client_fork < 0) {
e(5);
exit(5);
}
if (pid_client_fork == 0) {
/* We're a fork of the client. After we exec, the
* socket should stay valid due to lack of SOCK_CLOEXEC
* flag.
*/
char sockfd_buf[2];
int flags;
/* Verify O_CLOEXEC is off */
flags = fcntl(sockfd, F_GETFD);
if (flags < 0) e(5);
if (flags & FD_CLOEXEC) e(6);
/* t67a will verify that it can't write to sockfd and
* that opening a new file will yield a file descriptor
* with a higher number.
*/
snprintf(sockfd_buf, sizeof(sockfd_buf), "%d", sockfd);
execl("./t67a", "t67a", sockfd_buf, NULL);
/* Should not reach this */
exit(1);
} else {
if (waitpid(pid_client_fork, &result, 0) < 0) e(8);
exit(WEXITSTATUS(result)); /* Pass on error to main */
}
exit(0); /* Never reached */
}
if (waitpid(pid_server, &result, 0) < 0) e(3);
if (waitpid(pid_client, &result, 0) < 0) e(4);
/* Let's inspect client result */
if (WEXITSTATUS(result) != 0) e(5);
}
int
main(int argc, char *argv[])
{
start(67);
copy_subtests();
test_open_file_fork();
test_open_file_cloexec();
test_open_socket_fork();
test_open_socket_cloexec();
quit();
return(-1); /* Unreachable */
}