[deb_xorg-server.git] / hw / xquartz / mach-startup / stub.c

/* Copyright (c) 2008-2012 Apple Inc.
 *
 * Permission is hereby granted, free of charge, to any person
 * obtaining a copy of this software and associated documentation files
 * (the "Software"), to deal in the Software without restriction,
 * including without limitation the rights to use, copy, modify, merge,
 * publish, distribute, sublicense, and/or sell copies of the Software,
 * and to permit persons to whom the Software is furnished to do so,
 * subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT.  IN NO EVENT SHALL THE ABOVE LISTED COPYRIGHT
 * HOLDER(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 *
 * Except as contained in this notice, the name(s) of the above
 * copyright holders shall not be used in advertising or otherwise to
 * promote the sale, use or other dealings in this Software without
 * prior written authorization.
 */

#include <CoreServices/CoreServices.h>

#ifdef HAVE_DIX_CONFIG_H
#include <dix-config.h>
#endif

#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <asl.h>

#include <sys/socket.h>
#include <sys/un.h>

#define kX11AppBundleId   BUNDLE_ID_PREFIX ".X11"
#define kX11AppBundlePath "/Contents/MacOS/X11"

#include <mach/mach.h>
#include <mach/mach_error.h>
#include <servers/bootstrap.h>
#include "mach_startup.h"

#include <signal.h>

#include <AvailabilityMacros.h>

#include "launchd_fd.h"

static char x11_path[PATH_MAX + 1];
static pid_t x11app_pid = 0;
aslclient aslc;

static void
set_x11_path(void)
{
#if MAC_OS_X_VERSION_MIN_REQUIRED >= 1050

    CFURLRef appURL = NULL;
    OSStatus osstatus =
        LSFindApplicationForInfo(kLSUnknownCreator, CFSTR(
                                     kX11AppBundleId), nil, nil, &appURL);

    switch (osstatus) {
    case noErr:
        if (appURL == NULL) {
            asl_log(
                aslc, NULL, ASL_LEVEL_ERR,
                "Xquartz: Invalid response from LSFindApplicationForInfo(%s)",
                kX11AppBundleId);
            exit(1);
        }

        if (!CFURLGetFileSystemRepresentation(appURL, true,
                                              (unsigned char *)x11_path,
                                              sizeof(x11_path))) {
            asl_log(aslc, NULL, ASL_LEVEL_ERR,
                    "Xquartz: Error resolving URL for %s",
                    kX11AppBundleId);
            exit(3);
        }

        strlcat(x11_path, kX11AppBundlePath, sizeof(x11_path));
        asl_log(aslc, NULL, ASL_LEVEL_INFO, "Xquartz: X11.app = %s", x11_path);
        break;

    case kLSApplicationNotFoundErr:
        asl_log(aslc, NULL, ASL_LEVEL_ERR,
                "Xquartz: Unable to find application for %s",
                kX11AppBundleId);
        exit(10);

    default:
        asl_log(aslc, NULL, ASL_LEVEL_ERR,
                "Xquartz: Unable to find application for %s, error code = %d",
                kX11AppBundleId,
                (int)osstatus);
        exit(11);
    }
#else
    /* TODO: Make Tiger smarter... but TBH, this should never get called on Tiger... */
    strlcpy(x11_path, "/Applications/Utilities/X11.app/Contents/MacOS/X11",
            sizeof(x11_path));
#endif
}

static int
connect_to_socket(const char *filename)
{
    struct sockaddr_un servaddr_un;
    struct sockaddr *servaddr;
    socklen_t servaddr_len;
    int ret_fd;

    /* Setup servaddr_un */
    memset(&servaddr_un, 0, sizeof(struct sockaddr_un));
    servaddr_un.sun_family = AF_UNIX;
    strlcpy(servaddr_un.sun_path, filename, sizeof(servaddr_un.sun_path));

    servaddr = (struct sockaddr *)&servaddr_un;
    servaddr_len = sizeof(struct sockaddr_un) -
                   sizeof(servaddr_un.sun_path) + strlen(filename);

    ret_fd = socket(PF_UNIX, SOCK_STREAM, 0);
    if (ret_fd == -1) {
        asl_log(aslc, NULL, ASL_LEVEL_ERR,
                "Xquartz: Failed to create socket: %s - %s", filename,
                strerror(
                    errno));
        return -1;
    }

    if (connect(ret_fd, servaddr, servaddr_len) < 0) {
        asl_log(aslc, NULL, ASL_LEVEL_ERR,
                "Xquartz: Failed to connect to socket: %s - %d - %s",
                filename, errno,
                strerror(
                    errno));
        close(ret_fd);
        return -1;
    }

    return ret_fd;
}

static void
send_fd_handoff(int connected_fd, int launchd_fd)
{
    char databuf[] = "display";
    struct iovec iov[1];

    union {
        struct cmsghdr hdr;
        char bytes[CMSG_SPACE(sizeof(int))];
    } buf;

    struct msghdr msg;
    struct cmsghdr *cmsg;

    iov[0].iov_base = databuf;
    iov[0].iov_len = sizeof(databuf);

    msg.msg_iov = iov;
    msg.msg_iovlen = 1;
    msg.msg_control = buf.bytes;
    msg.msg_controllen = sizeof(buf);
    msg.msg_name = 0;
    msg.msg_namelen = 0;
    msg.msg_flags = 0;

    cmsg = CMSG_FIRSTHDR(&msg);
    cmsg->cmsg_level = SOL_SOCKET;
    cmsg->cmsg_type = SCM_RIGHTS;
    cmsg->cmsg_len = CMSG_LEN(sizeof(int));

    msg.msg_controllen = cmsg->cmsg_len;

    *((int *)CMSG_DATA(cmsg)) = launchd_fd;

    if (sendmsg(connected_fd, &msg, 0) < 0) {
        asl_log(
            aslc, NULL, ASL_LEVEL_ERR,
            "Xquartz: Error sending $DISPLAY file descriptor over fd %d: %d -- %s",
            connected_fd, errno, strerror(errno));
        return;
    }

    asl_log(aslc, NULL, ASL_LEVEL_DEBUG,
            "Xquartz: Message sent.  Closing handoff fd.");
    close(connected_fd);
}

__attribute__((__noreturn__))
static void
signal_handler(int sig)
{
    if (x11app_pid)
        kill(x11app_pid, sig);
    _exit(0);
}

int
main(int argc, char **argv, char **envp)
{
    int envpc;
    kern_return_t kr;
    mach_port_t mp;
    string_array_t newenvp;
    string_array_t newargv;
    size_t i;
    int launchd_fd;
    string_t handoff_socket_filename;
    sig_t handler;
    char *asl_sender;
    char *asl_facility;
    char *server_bootstrap_name = kX11AppBundleId;

    if (getenv("X11_PREFS_DOMAIN"))
        server_bootstrap_name = getenv("X11_PREFS_DOMAIN");

    asprintf(&asl_sender, "%s.stub", server_bootstrap_name);
    assert(asl_sender);

    asl_facility = strdup(server_bootstrap_name);
    assert(asl_facility);
    if (strcmp(asl_facility + strlen(asl_facility) - 4, ".X11") == 0)
        asl_facility[strlen(asl_facility) - 4] = '\0';

    assert(aslc = asl_open(asl_sender, asl_facility, ASL_OPT_NO_DELAY));
    free(asl_sender);
    free(asl_facility);

    /* We don't have a mechanism in place to handle this interrupt driven
     * server-start notification, so just send the signal now, so xinit doesn't
     * time out waiting for it and will just poll for the server.
     */
    handler = signal(SIGUSR1, SIG_IGN);
    if (handler == SIG_IGN)
        kill(getppid(), SIGUSR1);
    signal(SIGUSR1, handler);

    /* Pass on SIGs to X11.app */
    signal(SIGINT, signal_handler);
    signal(SIGTERM, signal_handler);

    /* Get the $DISPLAY FD */
    launchd_fd = launchd_display_fd();

    kr = bootstrap_look_up(bootstrap_port, server_bootstrap_name, &mp);
    if (kr != KERN_SUCCESS) {
        pid_t child;

        asl_log(aslc, NULL, ASL_LEVEL_WARNING,
                "Xquartz: Unable to locate waiting server: %s",
                server_bootstrap_name);
        set_x11_path();

        /* This forking is ugly and will be cleaned up later */
        child = fork();
        if (child == -1) {
            asl_log(aslc, NULL, ASL_LEVEL_ERR, "Xquartz: Could not fork: %s",
                    strerror(
                        errno));
            return EXIT_FAILURE;
        }

        if (child == 0) {
            char *_argv[3];
            _argv[0] = x11_path;
            _argv[1] = "--listenonly";
            _argv[2] = NULL;
            asl_log(aslc, NULL, ASL_LEVEL_NOTICE,
                    "Xquartz: Starting X server: %s --listenonly",
                    x11_path);
            return execvp(x11_path, _argv);
        }

        /* Try connecting for 10 seconds */
        for (i = 0; i < 80; i++) {
            usleep(250000);
            kr = bootstrap_look_up(bootstrap_port, server_bootstrap_name, &mp);
            if (kr == KERN_SUCCESS)
                break;
        }

        if (kr != KERN_SUCCESS) {
#if MAC_OS_X_VERSION_MIN_REQUIRED >= 1050
            asl_log(aslc, NULL, ASL_LEVEL_ERR,
                    "Xquartz: bootstrap_look_up(): %s", bootstrap_strerror(
                        kr));
#else
            asl_log(aslc, NULL, ASL_LEVEL_ERR,
                    "Xquartz: bootstrap_look_up(): %ul",
                    (unsigned long)kr);
#endif
            return EXIT_FAILURE;
        }
    }

    /* Get X11.app's pid */
    request_pid(mp, &x11app_pid);

    /* Handoff the $DISPLAY FD */
    if (launchd_fd != -1) {
        size_t try, try_max;
        int handoff_fd = -1;

        for (try = 0, try_max = 5; try < try_max; try++) {
            if (request_fd_handoff_socket(mp,
                                          handoff_socket_filename) !=
                KERN_SUCCESS) {
                asl_log(
                    aslc, NULL, ASL_LEVEL_INFO,
                    "Xquartz: Failed to request a socket from the server to send the $DISPLAY fd over (try %d of %d)",
                    (int)try + 1, (int)try_max);
                continue;
            }

            handoff_fd = connect_to_socket(handoff_socket_filename);
            if (handoff_fd == -1) {
                asl_log(aslc, NULL, ASL_LEVEL_ERR,
                        "Xquartz: Failed to connect to socket (try %d of %d)",
                        (int)try + 1,
                        (int)try_max);
                continue;
            }

            asl_log(
                aslc, NULL, ASL_LEVEL_INFO,
                "Xquartz: Handoff connection established (try %d of %d) on fd %d, \"%s\".  Sending message.",
                (int)try + 1, (int)try_max, handoff_fd,
                handoff_socket_filename);
            send_fd_handoff(handoff_fd, launchd_fd);
            close(handoff_fd);
            break;
        }
    }

    /* Count envp */
    for (envpc = 0; envp[envpc]; envpc++) ;

    /* We have fixed-size string lengths due to limitations in IPC,
     * so we need to copy our argv and envp.
     */
    newargv = (string_array_t)calloc((1 + argc), sizeof(string_t));
    newenvp = (string_array_t)calloc((1 + envpc), sizeof(string_t));

    if (!newargv || !newenvp) {
        /* Silence the clang static analyzer */
        free(newargv);
        free(newenvp);

        asl_log(aslc, NULL, ASL_LEVEL_ERR,
                "Xquartz: Memory allocation failure");
        return EXIT_FAILURE;
    }

    for (i = 0; i < argc; i++) {
        strlcpy(newargv[i], argv[i], STRING_T_SIZE);
    }
    for (i = 0; i < envpc; i++) {
        strlcpy(newenvp[i], envp[i], STRING_T_SIZE);
    }

    kr = start_x11_server(mp, newargv, argc, newenvp, envpc);

    free(newargv);
    free(newenvp);

    if (kr != KERN_SUCCESS) {
        asl_log(aslc, NULL, ASL_LEVEL_ERR, "Xquartz: start_x11_server: %s",
                mach_error_string(
                    kr));
        return EXIT_FAILURE;
    }
    return EXIT_SUCCESS;
}
Commit	Line	Data
a09e091a JB	1	/* Copyright (c) 2008-2012 Apple Inc.
	2	*
	3	* Permission is hereby granted, free of charge, to any person
	4	* obtaining a copy of this software and associated documentation files
	5	* (the "Software"), to deal in the Software without restriction,
	6	* including without limitation the rights to use, copy, modify, merge,
	7	* publish, distribute, sublicense, and/or sell copies of the Software,
	8	* and to permit persons to whom the Software is furnished to do so,
	9	* subject to the following conditions:
	10	*
	11	* The above copyright notice and this permission notice shall be
	12	* included in all copies or substantial portions of the Software.
	13	*
	14	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
	15	* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
	16	* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
	17	* NONINFRINGEMENT. IN NO EVENT SHALL THE ABOVE LISTED COPYRIGHT
	18	* HOLDER(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
	19	* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
	20	* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
	21	* DEALINGS IN THE SOFTWARE.
	22	*
	23	* Except as contained in this notice, the name(s) of the above
	24	* copyright holders shall not be used in advertising or otherwise to
	25	* promote the sale, use or other dealings in this Software without
	26	* prior written authorization.
	27	*/
	28
	29	#include <CoreServices/CoreServices.h>
	30
	31	#ifdef HAVE_DIX_CONFIG_H
	32	#include <dix-config.h>
	33	#endif
	34
	35	#include <string.h>
	36	#include <unistd.h>
	37	#include <errno.h>
	38	#include <asl.h>
	39
	40	#include <sys/socket.h>
	41	#include <sys/un.h>
	42
	43	#define kX11AppBundleId BUNDLE_ID_PREFIX ".X11"
	44	#define kX11AppBundlePath "/Contents/MacOS/X11"
	45
	46	#include <mach/mach.h>
	47	#include <mach/mach_error.h>
	48	#include <servers/bootstrap.h>
	49	#include "mach_startup.h"
	50
	51	#include <signal.h>
	52
	53	#include <AvailabilityMacros.h>
	54
	55	#include "launchd_fd.h"
	56
	57	static char x11_path[PATH_MAX + 1];
	58	static pid_t x11app_pid = 0;
	59	aslclient aslc;
	60
	61	static void
	62	set_x11_path(void)
	63	{
	64	#if MAC_OS_X_VERSION_MIN_REQUIRED >= 1050
65
66	CFURLRef appURL = NULL;
67	OSStatus osstatus =
68	LSFindApplicationForInfo(kLSUnknownCreator, CFSTR(
69	kX11AppBundleId), nil, nil, &appURL);
70
71	switch (osstatus) {
72	case noErr:
73	if (appURL == NULL) {
74	asl_log(
75	aslc, NULL, ASL_LEVEL_ERR,
76	"Xquartz: Invalid response from LSFindApplicationForInfo(%s)",
77	kX11AppBundleId);
78	exit(1);
79	}
80
81	if (!CFURLGetFileSystemRepresentation(appURL, true,
82	(unsigned char *)x11_path,
83	sizeof(x11_path))) {
84	asl_log(aslc, NULL, ASL_LEVEL_ERR,
85	"Xquartz: Error resolving URL for %s",
86	kX11AppBundleId);
87	exit(3);
88	}
89
90	strlcat(x11_path, kX11AppBundlePath, sizeof(x11_path));
91	asl_log(aslc, NULL, ASL_LEVEL_INFO, "Xquartz: X11.app = %s", x11_path);
92	break;
93
94	case kLSApplicationNotFoundErr:
95	asl_log(aslc, NULL, ASL_LEVEL_ERR,
96	"Xquartz: Unable to find application for %s",
97	kX11AppBundleId);
98	exit(10);
99
100	default:
101	asl_log(aslc, NULL, ASL_LEVEL_ERR,
102	"Xquartz: Unable to find application for %s, error code = %d",
103	kX11AppBundleId,
104	(int)osstatus);
105	exit(11);
106	}
107	#else
108	/* TODO: Make Tiger smarter... but TBH, this should never get called on Tiger... */
109	strlcpy(x11_path, "/Applications/Utilities/X11.app/Contents/MacOS/X11",
110	sizeof(x11_path));
111	#endif
112	}
113
114	static int
115	connect_to_socket(const char *filename)
116	{
117	struct sockaddr_un servaddr_un;
118	struct sockaddr *servaddr;
119	socklen_t servaddr_len;
120	int ret_fd;
121
122	/* Setup servaddr_un */
123	memset(&servaddr_un, 0, sizeof(struct sockaddr_un));
124	servaddr_un.sun_family = AF_UNIX;
125	strlcpy(servaddr_un.sun_path, filename, sizeof(servaddr_un.sun_path));
126
127	servaddr = (struct sockaddr *)&servaddr_un;
128	servaddr_len = sizeof(struct sockaddr_un) -
129	sizeof(servaddr_un.sun_path) + strlen(filename);
130
131	ret_fd = socket(PF_UNIX, SOCK_STREAM, 0);
132	if (ret_fd == -1) {
133	asl_log(aslc, NULL, ASL_LEVEL_ERR,
134	"Xquartz: Failed to create socket: %s - %s", filename,
135	strerror(
136	errno));
137	return -1;
138	}
139
140	if (connect(ret_fd, servaddr, servaddr_len) < 0) {
141	asl_log(aslc, NULL, ASL_LEVEL_ERR,
142	"Xquartz: Failed to connect to socket: %s - %d - %s",
143	filename, errno,
144	strerror(
145	errno));
146	close(ret_fd);
147	return -1;
148	}
149
150	return ret_fd;
151	}
152
153	static void
154	send_fd_handoff(int connected_fd, int launchd_fd)
155	{
156	char databuf[] = "display";
157	struct iovec iov[1];
158
159	union {
160	struct cmsghdr hdr;
161	char bytes[CMSG_SPACE(sizeof(int))];
162	} buf;
163
164	struct msghdr msg;
165	struct cmsghdr *cmsg;
166
167	iov[0].iov_base = databuf;
168	iov[0].iov_len = sizeof(databuf);
169
170	msg.msg_iov = iov;
171	msg.msg_iovlen = 1;
172	msg.msg_control = buf.bytes;
173	msg.msg_controllen = sizeof(buf);
174	msg.msg_name = 0;
175	msg.msg_namelen = 0;
176	msg.msg_flags = 0;
177
178	cmsg = CMSG_FIRSTHDR(&msg);
179	cmsg->cmsg_level = SOL_SOCKET;
180	cmsg->cmsg_type = SCM_RIGHTS;
181	cmsg->cmsg_len = CMSG_LEN(sizeof(int));
182
183	msg.msg_controllen = cmsg->cmsg_len;
184
185	((int )CMSG_DATA(cmsg)) = launchd_fd;
186
187	if (sendmsg(connected_fd, &msg, 0) < 0) {
188	asl_log(
189	aslc, NULL, ASL_LEVEL_ERR,
190	"Xquartz: Error sending $DISPLAY file descriptor over fd %d: %d -- %s",
191	connected_fd, errno, strerror(errno));
192	return;
193	}
194
195	asl_log(aslc, NULL, ASL_LEVEL_DEBUG,
196	"Xquartz: Message sent. Closing handoff fd.");
197	close(connected_fd);
198	}
199
200	__attribute__((__noreturn__))
201	static void
202	signal_handler(int sig)
203	{
204	if (x11app_pid)
205	kill(x11app_pid, sig);
206	_exit(0);
207	}
208
209	int
210	main(int argc, char argv, char envp)
211	{
212	int envpc;
213	kern_return_t kr;
214	mach_port_t mp;
215	string_array_t newenvp;
216	string_array_t newargv;
217	size_t i;
218	int launchd_fd;
219	string_t handoff_socket_filename;
220	sig_t handler;
221	char *asl_sender;
222	char *asl_facility;
223	char *server_bootstrap_name = kX11AppBundleId;
224
225	if (getenv("X11_PREFS_DOMAIN"))
226	server_bootstrap_name = getenv("X11_PREFS_DOMAIN");
227
228	asprintf(&asl_sender, "%s.stub", server_bootstrap_name);
229	assert(asl_sender);
230
231	asl_facility = strdup(server_bootstrap_name);
232	assert(asl_facility);
233	if (strcmp(asl_facility + strlen(asl_facility) - 4, ".X11") == 0)
234	asl_facility[strlen(asl_facility) - 4] = '\0';
235
236	assert(aslc = asl_open(asl_sender, asl_facility, ASL_OPT_NO_DELAY));
237	free(asl_sender);
238	free(asl_facility);
239
240	/* We don't have a mechanism in place to handle this interrupt driven
241	* server-start notification, so just send the signal now, so xinit doesn't
242	* time out waiting for it and will just poll for the server.
243	*/
244	handler = signal(SIGUSR1, SIG_IGN);
245	if (handler == SIG_IGN)
246	kill(getppid(), SIGUSR1);
247	signal(SIGUSR1, handler);
248
249	/* Pass on SIGs to X11.app */
250	signal(SIGINT, signal_handler);
251	signal(SIGTERM, signal_handler);
252
253	/* Get the $DISPLAY FD */
254	launchd_fd = launchd_display_fd();
255
256	kr = bootstrap_look_up(bootstrap_port, server_bootstrap_name, &mp);
257	if (kr != KERN_SUCCESS) {
258	pid_t child;
259
260	asl_log(aslc, NULL, ASL_LEVEL_WARNING,
261	"Xquartz: Unable to locate waiting server: %s",
262	server_bootstrap_name);
263	set_x11_path();
264
265	/* This forking is ugly and will be cleaned up later */
266	child = fork();
267	if (child == -1) {
268	asl_log(aslc, NULL, ASL_LEVEL_ERR, "Xquartz: Could not fork: %s",
269	strerror(
270	errno));
271	return EXIT_FAILURE;
272	}
273
274	if (child == 0) {
275	char *_argv[3];
276	_argv[0] = x11_path;
277	_argv[1] = "--listenonly";
278	_argv[2] = NULL;
279	asl_log(aslc, NULL, ASL_LEVEL_NOTICE,
280	"Xquartz: Starting X server: %s --listenonly",
281	x11_path);
282	return execvp(x11_path, _argv);
283	}
284
285	/* Try connecting for 10 seconds */
286	for (i = 0; i < 80; i++) {
287	usleep(250000);
288	kr = bootstrap_look_up(bootstrap_port, server_bootstrap_name, &mp);
289	if (kr == KERN_SUCCESS)
290	break;
291	}
292
293	if (kr != KERN_SUCCESS) {
294	#if MAC_OS_X_VERSION_MIN_REQUIRED >= 1050
295	asl_log(aslc, NULL, ASL_LEVEL_ERR,
296	"Xquartz: bootstrap_look_up(): %s", bootstrap_strerror(
297	kr));
298	#else
299	asl_log(aslc, NULL, ASL_LEVEL_ERR,
300	"Xquartz: bootstrap_look_up(): %ul",
301	(unsigned long)kr);
302	#endif
303	return EXIT_FAILURE;
304	}
305	}
306
307	/* Get X11.app's pid */
308	request_pid(mp, &x11app_pid);
309
310	/* Handoff the $DISPLAY FD */
311	if (launchd_fd != -1) {
312	size_t try, try_max;
313	int handoff_fd = -1;
314
315	for (try = 0, try_max = 5; try < try_max; try++) {
316	if (request_fd_handoff_socket(mp,
317	handoff_socket_filename) !=
318	KERN_SUCCESS) {
319	asl_log(
320	aslc, NULL, ASL_LEVEL_INFO,
321	"Xquartz: Failed to request a socket from the server to send the $DISPLAY fd over (try %d of %d)",
322	(int)try + 1, (int)try_max);
323	continue;
324	}
325
326	handoff_fd = connect_to_socket(handoff_socket_filename);
327	if (handoff_fd == -1) {
328	asl_log(aslc, NULL, ASL_LEVEL_ERR,
329	"Xquartz: Failed to connect to socket (try %d of %d)",
330	(int)try + 1,
331	(int)try_max);
332	continue;
333	}
334
335	asl_log(
336	aslc, NULL, ASL_LEVEL_INFO,
337	"Xquartz: Handoff connection established (try %d of %d) on fd %d, \"%s\". Sending message.",
338	(int)try + 1, (int)try_max, handoff_fd,
339	handoff_socket_filename);
340	send_fd_handoff(handoff_fd, launchd_fd);
341	close(handoff_fd);
342	break;
343	}
344	}
345
346	/* Count envp */
347	for (envpc = 0; envp[envpc]; envpc++) ;
348
349	/* We have fixed-size string lengths due to limitations in IPC,
350	* so we need to copy our argv and envp.
351	*/
352	newargv = (string_array_t)calloc((1 + argc), sizeof(string_t));
353	newenvp = (string_array_t)calloc((1 + envpc), sizeof(string_t));
354
355	if (!newargv \|\| !newenvp) {
356	/* Silence the clang static analyzer */
357	free(newargv);
358	free(newenvp);
359
360	asl_log(aslc, NULL, ASL_LEVEL_ERR,
361	"Xquartz: Memory allocation failure");
362	return EXIT_FAILURE;
363	}
364
365	for (i = 0; i < argc; i++) {
366	strlcpy(newargv[i], argv[i], STRING_T_SIZE);
367	}
368	for (i = 0; i < envpc; i++) {
369	strlcpy(newenvp[i], envp[i], STRING_T_SIZE);
370	}
371
372	kr = start_x11_server(mp, newargv, argc, newenvp, envpc);
373
374	free(newargv);
375	free(newenvp);
376
377	if (kr != KERN_SUCCESS) {
378	asl_log(aslc, NULL, ASL_LEVEL_ERR, "Xquartz: start_x11_server: %s",
379	mach_error_string(
380	kr));
381	return EXIT_FAILURE;
382	}
383	return EXIT_SUCCESS;
384	}