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Revert trying to preserve /dev/mach fd across fork
This reverts commits d2a9f7c1f2dcba742dfa916731b259ce1130614a, bd41bf0c13dd3ca6505194b2796100135a6fae28 and 7d27170108ed735ba2af6dd86475d9175136a2b1.
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src/kernel/mach_server/client/lkm.c
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-15
src/kernel/mach_server/client/lkm.c
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#include <fcntl.h>
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#include <unistd.h>
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#define LINUX_O_CLOEXEC 02000000
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int driver_fd = -1;
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extern int __real_ioctl(int fd, int cmd, void* arg);
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void mach_driver_init(void)
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{
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int new_driver_fd;
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if (driver_fd != -1)
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close(driver_fd);
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new_driver_fd = open("/dev/mach", O_RDWR | O_CLOEXEC);
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if (new_driver_fd == -1)
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driver_fd = open("/dev/mach", O_RDWR | O_CLOEXEC);
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if (driver_fd == -1)
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{
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const char* msg = "Cannot open /dev/mach. Aborting.\nMake sure you have loaded the darling-mach kernel module.\n";
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write(2, msg, strlen(msg));
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abort();
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}
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// Ensure we get the same fd number, even if lower ones are available
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if (driver_fd != -1 && driver_fd != new_driver_fd)
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{
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dup3(new_driver_fd, driver_fd, LINUX_O_CLOEXEC); // native Linux syscall
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close(new_driver_fd);
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}
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else
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driver_fd = new_driver_fd;
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if (__real_ioctl(driver_fd, NR_get_api_version, 0) != DARLING_MACH_API_VERSION)
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{