static void test_dup2(abts_case *tc, void *data)
{
apr_file_t *testfile = NULL;
apr_file_t *errfile = NULL;
apr_file_t *saveerr = NULL;
apr_status_t rv;
rv = apr_file_open(&testfile, FILEPATH "testdup2.file",
APR_FOPEN_READ | APR_FOPEN_WRITE | APR_FOPEN_CREATE |
APR_FOPEN_DELONCLOSE, APR_OS_DEFAULT, p);
ABTS_INT_EQUAL(tc, APR_SUCCESS, rv);
ABTS_PTR_NOTNULL(tc, testfile);
rv = apr_file_open_stderr(&errfile, p);
ABTS_INT_EQUAL(tc, APR_SUCCESS, rv);
/* Set aside the real errfile */
rv = apr_file_dup(&saveerr, errfile, p);
ABTS_INT_EQUAL(tc, APR_SUCCESS, rv);
ABTS_PTR_NOTNULL(tc, saveerr);
rv = apr_file_dup2(errfile, testfile, p);
ABTS_INT_EQUAL(tc, APR_SUCCESS, rv);
ABTS_PTR_NOTNULL(tc, errfile);
apr_file_close(testfile);
rv = apr_file_dup2(errfile, saveerr, p);
ABTS_INT_EQUAL(tc, APR_SUCCESS, rv);
ABTS_PTR_NOTNULL(tc, errfile);
apr_file_close(saveerr);
}
static void test_dup2_readwrite(abts_case *tc, void *data)
{
apr_file_t *errfile = NULL;
apr_file_t *testfile = NULL;
apr_file_t *saveerr = NULL;
apr_status_t rv;
apr_size_t txtlen = sizeof(TEST);
char buff[50];
apr_off_t fpos;
rv = apr_file_open(&testfile, FILEPATH "testdup2.readwrite.file",
APR_FOPEN_READ | APR_FOPEN_WRITE | APR_FOPEN_CREATE |
APR_FOPEN_DELONCLOSE, APR_OS_DEFAULT, p);
ABTS_INT_EQUAL(tc, APR_SUCCESS, rv);
ABTS_PTR_NOTNULL(tc, testfile);
rv = apr_file_open_stderr(&errfile, p);
ABTS_INT_EQUAL(tc, APR_SUCCESS, rv);
/* Set aside the real errfile */
rv = apr_file_dup(&saveerr, errfile, p);
ABTS_INT_EQUAL(tc, APR_SUCCESS, rv);
ABTS_PTR_NOTNULL(tc, saveerr);
rv = apr_file_dup2(errfile, testfile, p);
ABTS_INT_EQUAL(tc, APR_SUCCESS, rv);
ABTS_PTR_NOTNULL(tc, errfile);
txtlen = sizeof(TEST2);
rv = apr_file_write(errfile, TEST2, &txtlen);
ABTS_INT_EQUAL(tc, APR_SUCCESS, rv);
ABTS_SIZE_EQUAL(tc, sizeof(TEST2), txtlen);
fpos = 0;
rv = apr_file_seek(testfile, APR_SET, &fpos);
ABTS_INT_EQUAL(tc, APR_SUCCESS, rv);
ABTS_ASSERT(tc, "File position mismatch, expected 0", fpos == 0);
txtlen = 50;
rv = apr_file_read(testfile, buff, &txtlen);
ABTS_INT_EQUAL(tc, APR_SUCCESS, rv);
ABTS_STR_EQUAL(tc, TEST2, buff);
apr_file_close(testfile);
rv = apr_file_dup2(errfile, saveerr, p);
ABTS_INT_EQUAL(tc, APR_SUCCESS, rv);
ABTS_PTR_NOTNULL(tc, errfile);
apr_file_close(saveerr);
}
AP_DECLARE(apr_status_t) ap_replace_stderr_log(apr_pool_t *p,
const char *fname)
{
apr_file_t *stderr_file;
apr_status_t rc;
char *filename = ap_server_root_relative(p, fname);
if (!filename) {
ap_log_error(APLOG_MARK, APLOG_STARTUP|APLOG_CRIT,
APR_EBADPATH, NULL, "Invalid -E error log file %s",
fname);
return APR_EBADPATH;
}
if ((rc = apr_file_open(&stderr_file, filename,
APR_APPEND | APR_WRITE | APR_CREATE | APR_LARGEFILE,
APR_OS_DEFAULT, p)) != APR_SUCCESS) {
ap_log_error(APLOG_MARK, APLOG_STARTUP, rc, NULL,
"%s: could not open error log file %s.",
ap_server_argv0, fname);
return rc;
}
if ((rc = apr_file_open_stderr(&stderr_log, p)) == APR_SUCCESS) {
apr_file_flush(stderr_log);
if ((rc = apr_file_dup2(stderr_log, stderr_file, p)) == APR_SUCCESS) {
apr_file_close(stderr_file);
}
}
if (rc != APR_SUCCESS) {
ap_log_error(APLOG_MARK, APLOG_CRIT, rc, NULL,
"unable to replace stderr with error_log");
}
return rc;
}
AP_DECLARE(void) ap_error_log2stderr(server_rec *s) {
apr_file_t *errfile = NULL;
apr_file_open_stderr(&errfile, s->process->pool);
if (s->error_log != NULL) {
apr_file_dup2(s->error_log, errfile, s->process->pool);
}
}
/* Redirect stdout to stderr. ARG is the pool.
*
* In tunnel or inetd mode, we don't want hook scripts corrupting the
* data stream by sending data to stdout, so we need to redirect
* stdout somewhere else. Sending it to stderr is acceptable; sending
* it to /dev/null is another option, but apr doesn't provide a way to
* do that without also detaching from the controlling terminal.
*/
static apr_status_t redirect_stdout(void *arg)
{
apr_pool_t *pool = arg;
apr_file_t *out_file, *err_file;
apr_status_t apr_err;
if ((apr_err = apr_file_open_stdout(&out_file, pool)))
return apr_err;
if ((apr_err = apr_file_open_stderr(&err_file, pool)))
return apr_err;
return apr_file_dup2(out_file, err_file, pool);
}
AP_DECLARE(apr_status_t) ap_replace_stderr_log(apr_pool_t *p,
const char *fname)
{
apr_file_t *stderr_file;
apr_status_t rc;
char *filename = ap_server_root_relative(p, fname);
if (!filename) {
ap_log_error(APLOG_MARK, APLOG_STARTUP|APLOG_CRIT,
APR_EBADPATH, NULL, "Invalid -E error log file %s",
fname);
return APR_EBADPATH;
}
if ((rc = apr_file_open(&stderr_file, filename,
APR_APPEND | APR_WRITE | APR_CREATE | APR_LARGEFILE,
APR_OS_DEFAULT, p)) != APR_SUCCESS) {
ap_log_error(APLOG_MARK, APLOG_STARTUP, rc, NULL,
"%s: could not open error log file %s.",
ap_server_argv0, fname);
return rc;
}
if (!stderr_pool) {
/* This is safe provided we revert it when we are finished.
* We don't manager the callers pool!
*/
stderr_pool = p;
}
if ((rc = apr_file_open_stderr(&stderr_log, stderr_pool))
== APR_SUCCESS) {
apr_file_flush(stderr_log);
if ((rc = apr_file_dup2(stderr_log, stderr_file, stderr_pool))
== APR_SUCCESS) {
apr_file_close(stderr_file);
/*
* You might ponder why stderr_pool should survive?
* The trouble is, stderr_pool may have s_main->error_log,
* so we aren't in a position to destory stderr_pool until
* the next recycle. There's also an apparent bug which
* is not; if some folk decided to call this function before
* the core open error logs hook, this pool won't survive.
* Neither does the stderr logger, so this isn't a problem.
*/
}
}
/* Revert, see above */
if (stderr_pool == p)
stderr_pool = NULL;
if (rc != APR_SUCCESS) {
ap_log_error(APLOG_MARK, APLOG_CRIT, rc, NULL,
"unable to replace stderr with error log file");
}
return rc;
}
void mpm_nt_eventlog_stderr_open(char *argv0, apr_pool_t *p)
{
SECURITY_ATTRIBUTES sa;
HANDLE hProc = GetCurrentProcess();
HANDLE hPipeRead = NULL;
HANDLE hPipeWrite = NULL;
HANDLE hDup = NULL;
DWORD threadid;
apr_file_t *eventlog_file;
apr_file_t *stderr_file;
display_name = argv0;
/* Create a pipe to send stderr messages to the system error log.
*
* _dup2() duplicates the write handle inheritable for us.
*/
sa.nLength = sizeof(sa);
sa.lpSecurityDescriptor = NULL;
sa.bInheritHandle = FALSE;
CreatePipe(&hPipeRead, &hPipeWrite, NULL, 0);
ap_assert(hPipeRead && hPipeWrite);
stderr_ready = CreateEvent(NULL, FALSE, FALSE, NULL);
stderr_thread = CreateThread(NULL, 0, service_stderr_thread,
(LPVOID) hPipeRead, 0, &threadid);
ap_assert(stderr_ready && stderr_thread);
WaitForSingleObject(stderr_ready, INFINITE);
if ((apr_file_open_stderr(&stderr_file, p)
== APR_SUCCESS)
&& (apr_os_file_put(&eventlog_file, &hPipeWrite, APR_WRITE, p)
== APR_SUCCESS))
apr_file_dup2(stderr_file, eventlog_file, p);
/* The code above _will_ corrupt the StdHandle...
* and we must do so anyways. We set this up only
* after we initialized the posix stderr API.
*/
ap_open_stderr_log(p);
}
int ap_open_logs(apr_pool_t *pconf, apr_pool_t *p /* plog */,
apr_pool_t *ptemp, server_rec *s_main)
{
apr_status_t rc = APR_SUCCESS;
server_rec *virt, *q;
int replace_stderr;
apr_file_t *errfile = NULL;
apr_pool_cleanup_register(p, NULL, clear_handle_list,
apr_pool_cleanup_null);
if (open_error_log(s_main, 1, p) != OK) {
return DONE;
}
replace_stderr = 1;
if (s_main->error_log) {
/* replace stderr with this new log */
apr_file_flush(s_main->error_log);
if ((rc = apr_file_open_stderr(&errfile, p)) == APR_SUCCESS) {
rc = apr_file_dup2(errfile, s_main->error_log, p);
}
if (rc != APR_SUCCESS) {
ap_log_error(APLOG_MARK, APLOG_CRIT, rc, s_main,
"unable to replace stderr with error_log");
}
else {
replace_stderr = 0;
}
}
/* note that stderr may still need to be replaced with something
* because it points to the old error log, or back to the tty
* of the submitter.
* XXX: This is BS - /dev/null is non-portable
*/
if (replace_stderr && freopen("/dev/null", "w", stderr) == NULL) {
ap_log_error(APLOG_MARK, APLOG_CRIT, errno, s_main,
"unable to replace stderr with /dev/null");
}
for (virt = s_main->next; virt; virt = virt->next) {
if (virt->error_fname) {
for (q=s_main; q != virt; q = q->next) {
if (q->error_fname != NULL
&& strcmp(q->error_fname, virt->error_fname) == 0) {
break;
}
}
if (q == virt) {
if (open_error_log(virt, 0, p) != OK) {
return DONE;
}
}
else {
virt->error_log = q->error_log;
}
}
else {
virt->error_log = s_main->error_log;
}
}
return OK;
}
int main(int argc, const char * const argv[])
{
apr_file_t *infd, *skwrapper;
apr_sockaddr_t *skaddr;
apr_getopt_t *gopt;
apr_socket_t *skt;
apr_pool_t *pool;
apr_status_t rv;
apr_proc_t proc;
/* Command line arguments */
int num_to_start = 1, port = 0;
const char *interface = NULL;
const char *command = NULL;
apr_app_initialize(&argc, &argv, NULL);
atexit(apr_terminate);
apr_pool_create(&pool, NULL);
rv = apr_getopt_init(&gopt, pool, argc, argv);
if (rv) {
return EXIT_FAILURE;
}
for (;;) {
const char *arg;
char opt;
rv = apr_getopt(gopt, "c:p:i:N:", &opt, &arg);
if (APR_STATUS_IS_EOF(rv)) {
break;
} else if (rv) {
usage();
} else {
switch (opt) {
case 'c':
command = arg;
break;
case 'p':
port = atoi(arg);
if (! port) {
usage();
}
break;
case 'i':
interface = arg;
break;
case 'N':
num_to_start = atoi(arg);
if (! num_to_start) {
usage();
}
break;
default:
break;
}
}
}
if (! command || ! port) {
usage();
}
rv = apr_sockaddr_info_get(&skaddr, interface, APR_UNSPEC, port, 0, pool);
if (rv) {
exit_error(rv, "apr_sockaddr_info_get");
}
rv = apr_socket_create(&skt, skaddr->family, SOCK_STREAM, APR_PROTO_TCP, pool);
if (rv) {
exit_error(rv, "apr_socket_create");
}
rv = apr_socket_bind(skt, skaddr);
if (rv) {
exit_error(rv, "apr_socket_bind");
}
rv = apr_socket_listen(skt, 1024);
if (rv) {
exit_error(rv, "apr_socket_listen");
}
rv = apr_proc_detach(APR_PROC_DETACH_DAEMONIZE);
if (rv) {
exit_error(rv, "apr_proc_detach");
}
#if defined(WIN32) || defined(OS2) || defined(NETWARE)
#error "Please implement me."
#else
while (--num_to_start >= 0) {
rv = apr_proc_fork(&proc, pool);
if (rv == APR_INCHILD) {
apr_os_file_t oft = 0;
apr_os_sock_t oskt;
/* Ok, so we need a file that has file descriptor 0 (which
* FastCGI wants), but points to our socket. This isn't really
* possible in APR, so we cheat a bit. I have no idea how to
* do this on a non-unix platform, so for now this is platform
* specific. Ick.
*
* Note that this has to happen post-detach, otherwise fd 0
* gets closed during apr_proc_detach and it's all for nothing.
*
* Unfortunately, doing this post detach means we have no way
* to let anyone know if there's a problem at this point :( */
rv = apr_os_file_put(&infd, &oft, APR_READ | APR_WRITE, pool);
if (rv) {
exit(EXIT_FAILURE);
}
rv = apr_os_sock_get(&oskt, skt);
if (rv) {
exit(EXIT_FAILURE);
}
rv = apr_os_file_put(&skwrapper, &oskt, APR_READ | APR_WRITE,
pool);
if (rv) {
exit(EXIT_FAILURE);
}
rv = apr_file_dup2(infd, skwrapper, pool);
if (rv) {
exit(EXIT_FAILURE);
}
/* XXX Can't use apr_proc_create because there's no way to get
* infd into the procattr without going through another dup2,
* which means by the time it gets to the fastcgi process it
* is no longer fd 0, so it doesn't work. Sigh. */
execl(command, command, NULL);
} else if (rv == APR_INPARENT) {
if (num_to_start == 0) {
apr_socket_close(skt);
}
} else {
exit_error(rv, "apr_proc_fork");
}
}
#endif
return EXIT_SUCCESS;
}
int ap_open_logs(apr_pool_t *pconf, apr_pool_t *p /* plog */,
apr_pool_t *ptemp, server_rec *s_main)
{
apr_pool_t *stderr_p;
server_rec *virt, *q;
int replace_stderr;
/* Register to throw away the read_handles list when we
* cleanup plog. Upon fork() for the apache children,
* this read_handles list is closed so only the parent
* can relaunch a lost log child. These read handles
* are always closed on exec.
* We won't care what happens to our stderr log child
* between log phases, so we don't mind losing stderr's
* read_handle a little bit early.
*/
apr_pool_cleanup_register(p, NULL, clear_handle_list,
apr_pool_cleanup_null);
/* HERE we need a stdout log that outlives plog.
* We *presume* the parent of plog is a process
* or global pool which spans server restarts.
* Create our stderr_pool as a child of the plog's
* parent pool.
*/
apr_pool_create(&stderr_p, apr_pool_parent_get(p));
apr_pool_tag(stderr_p, "stderr_pool");
if (open_error_log(s_main, 1, stderr_p) != OK) {
return DONE;
}
replace_stderr = 1;
if (s_main->error_log) {
apr_status_t rv;
/* Replace existing stderr with new log. */
apr_file_flush(s_main->error_log);
rv = apr_file_dup2(stderr_log, s_main->error_log, stderr_p);
if (rv != APR_SUCCESS) {
ap_log_error(APLOG_MARK, APLOG_CRIT, rv, s_main,
"unable to replace stderr with error_log");
}
else {
/* We are done with stderr_pool, close it, killing
* the previous generation's stderr logger
*/
if (stderr_pool)
apr_pool_destroy(stderr_pool);
stderr_pool = stderr_p;
replace_stderr = 0;
/*
* Now that we have dup'ed s_main->error_log to stderr_log
* close it and set s_main->error_log to stderr_log. This avoids
* this fd being inherited by the next piped logger who would
* keep open the writing end of the pipe that this one uses
* as stdin. This in turn would prevent the piped logger from
* exiting.
*/
apr_file_close(s_main->error_log);
s_main->error_log = stderr_log;
}
}
/* note that stderr may still need to be replaced with something
* because it points to the old error log, or back to the tty
* of the submitter.
* XXX: This is BS - /dev/null is non-portable
*/
if (replace_stderr && freopen("/dev/null", "w", stderr) == NULL) {
ap_log_error(APLOG_MARK, APLOG_CRIT, errno, s_main,
"unable to replace stderr with /dev/null");
}
for (virt = s_main->next; virt; virt = virt->next) {
if (virt->error_fname) {
for (q=s_main; q != virt; q = q->next) {
if (q->error_fname != NULL
&& strcmp(q->error_fname, virt->error_fname) == 0) {
break;
}
}
if (q == virt) {
if (open_error_log(virt, 0, p) != OK) {
return DONE;
}
}
else {
virt->error_log = q->error_log;
}
}
else {
virt->error_log = s_main->error_log;
}
}
return OK;
}
