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// Copyright (C) 2021 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0+ OR GPL-3.0 WITH Qt-GPL-exception-1.0
#include <stdio.h>
#include <stdlib.h>
#include <spawn.h>
#include <signal.h>
#include <string.h>
extern "C" {
int responsibility_spawnattrs_setdisclaim(posix_spawnattr_t attrs, int disclaim)
__attribute__((availability(macos,introduced=10.14),weak_import));
}
#define CHECK(expr) \
if (int err = (expr)) { \
fprintf(stderr, "%s: %s", #expr, strerror(err)); \
exit(err); \
}
int main(int argc, char *const *argv, char *const *envp)
{
if (argc < 2) {
printf("Disclaims all TCC responsibilities for the launched process\n"
"usage: disclaim <command> [arguments]\n");
return 1;
}
posix_spawnattr_t attr;
CHECK(posix_spawnattr_init(&attr));
// Behave as exec
short flags = POSIX_SPAWN_SETEXEC;
// Reset signal mask
sigset_t no_signals;
sigemptyset(&no_signals);
CHECK(posix_spawnattr_setsigmask(&attr, &no_signals));
flags |= POSIX_SPAWN_SETSIGMASK;
// Reset all signals to their default handlers
sigset_t all_signals;
sigfillset(&all_signals);
CHECK(posix_spawnattr_setsigdefault(&attr, &all_signals));
flags |= POSIX_SPAWN_SETSIGDEF;
CHECK(posix_spawnattr_setflags(&attr, flags));
if (@available(macOS 10.14, *)) {
// Disclaim TCC responsibilities
if (responsibility_spawnattrs_setdisclaim)
CHECK(responsibility_spawnattrs_setdisclaim(&attr, 1));
}
pid_t pid = 0;
int err = posix_spawnp(&pid, argv[1], nullptr, &attr, argv + 1, envp);
fprintf(stderr, "Failed to launch %s: %s", argv[1], strerror(err));
posix_spawnattr_destroy(&attr);
return err;
}
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