88 lines
3.3 KiB
C
88 lines
3.3 KiB
C
/* Copyright (c) 2021 Apple Inc.
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation files
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* (the "Software"), to deal in the Software without restriction,
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* including without limitation the rights to use, copy, modify, merge,
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* publish, distribute, sublicense, and/or sell copies of the Software,
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* and to permit persons to whom the Software is furnished to do so,
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* subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE ABOVE LISTED COPYRIGHT
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* HOLDER(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*
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* Except as contained in this notice, the name(s) of the above
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* copyright holders shall not be used in advertising or otherwise to
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* promote the sale, use or other dealings in this Software without
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* prior written authorization.
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*/
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#include <assert.h>
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#include <mach-o/dyld.h>
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#include <libgen.h>
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#include <spawn.h>
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#include <sys/syslimits.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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/* We wnt XQuartz.app to inherit a login shell environment. This is handled by the X11.sh
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* script which re-execs the main binary from a login shell environment. However, recent
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* versions of macOS require that the main executable of an app be Mach-O for full system
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* fidelity.
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*
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* Failure to do so results in two problems:
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* 1) bash is seen as the responsible executable for Security & Privacy, and the user doesn't
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* get prompted to allow filesystem access (https://github.com/XQuartz/XQuartz/issues/6).
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* 2) The process is launched under Rosetta for compatability, which results in
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* the subsequent spawn of the real executable under Rosetta rather than natively.
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*
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* This trampoline provides the mach-o needed by LaunchServices and TCC to satisfy those
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* needs and simply execs the startup script which then execs the main binary.
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*/
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static char *executable_path() {
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uint32_t bufsize = PATH_MAX;
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char *buf = calloc(1, bufsize);
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if (_NSGetExecutablePath(buf, &bufsize) == -1) {
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free(buf);
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buf = calloc(1, bufsize);
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assert(_NSGetExecutablePath(buf, &bufsize) == 0);
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}
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return buf;
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}
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int main(int argc, char **argv, char **envp) {
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char const * const executable_directory = dirname(executable_path());
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char *executable = NULL;
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asprintf(&executable, "%s/X11.sh", executable_directory);
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if (access(executable, X_OK) == -1) {
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free(executable);
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asprintf(&executable, "%s/X11", executable_directory);
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}
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assert(access(executable, X_OK) == 0);
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argv[0] = executable;
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posix_spawnattr_t attr;
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assert(posix_spawnattr_init(&attr) == 0);
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assert(posix_spawnattr_setflags(&attr, POSIX_SPAWN_SETEXEC) == 0);
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pid_t child_pid;
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assert(posix_spawn(&child_pid, executable, NULL, &attr, argv, envp) == 0);
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return EXIT_FAILURE;
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}
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