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/* Copyright (c) 2021 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 <assert.h>
#include <mach-o/dyld.h>
#include <libgen.h>
#include <spawn.h>
#include <sys/syslimits.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
/* We wnt XQuartz.app to inherit a login shell environment. This is handled by the X11.sh
* script which re-execs the main binary from a login shell environment. However, recent
* versions of macOS require that the main executable of an app be Mach-O for full system
* fidelity.
*
* Failure to do so results in two problems:
* 1) bash is seen as the responsible executable for Security & Privacy, and the user doesn't
* get prompted to allow filesystem access (https://github.com/XQuartz/XQuartz/issues/6).
* 2) The process is launched under Rosetta for compatability, which results in
* the subsequent spawn of the real executable under Rosetta rather than natively.
*
* This trampoline provides the mach-o needed by LaunchServices and TCC to satisfy those
* needs and simply execs the startup script which then execs the main binary.
*/
static char *executable_path() {
uint32_t bufsize = PATH_MAX;
char *buf = calloc(1, bufsize);
if (_NSGetExecutablePath(buf, &bufsize) == -1) {
free(buf);
buf = calloc(1, bufsize);
assert(_NSGetExecutablePath(buf, &bufsize) == 0);
}
return buf;
}
int main(int argc, char **argv, char **envp) {
char const * const executable_directory = dirname(executable_path());
char *executable = NULL;
asprintf(&executable, "%s/X11.sh", executable_directory);
if (access(executable, X_OK) == -1) {
free(executable);
asprintf(&executable, "%s/X11", executable_directory);
}
assert(access(executable, X_OK) == 0);
argv[0] = executable;
posix_spawnattr_t attr;
assert(posix_spawnattr_init(&attr) == 0);
assert(posix_spawnattr_setflags(&attr, POSIX_SPAWN_SETEXEC) == 0);
pid_t child_pid;
assert(posix_spawn(&child_pid, executable, NULL, &attr, argv, envp) == 0);
return EXIT_FAILURE;
}
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