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author | Rich Felker <dalias@aerifal.cx> | 2020-09-30 13:24:28 -0400 |
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committer | Rich Felker <dalias@aerifal.cx> | 2020-10-14 20:27:12 -0400 |
commit | e1e98d869c5b3ebf59e0d0006c108daf0368245e (patch) | |
tree | 86e230be6f6373e59cf545d0812b17fb0393581e /src/process/_Fork.c | |
parent | 50716702d41d5f6f31c1075a1734b9f759477f0d (diff) | |
download | musl-e1e98d869c5b3ebf59e0d0006c108daf0368245e.tar.gz |
rename fork source file
this is in preparation for implementing _Fork from POSIX-future,
factored as a separate commit to improve readability of history.
Diffstat (limited to 'src/process/_Fork.c')
-rw-r--r-- | src/process/_Fork.c | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/src/process/_Fork.c b/src/process/_Fork.c new file mode 100644 index 00000000..17fb87ad --- /dev/null +++ b/src/process/_Fork.c @@ -0,0 +1,44 @@ +#include <unistd.h> +#include <string.h> +#include <signal.h> +#include "syscall.h" +#include "libc.h" +#include "lock.h" +#include "pthread_impl.h" + +static void dummy(int x) +{ +} + +weak_alias(dummy, __fork_handler); +weak_alias(dummy, __aio_atfork); + +pid_t fork(void) +{ + pid_t ret; + sigset_t set; + __fork_handler(-1); + __block_all_sigs(&set); + __aio_atfork(-1); + LOCK(__abort_lock); +#ifdef SYS_fork + ret = __syscall(SYS_fork); +#else + ret = __syscall(SYS_clone, SIGCHLD, 0); +#endif + if (!ret) { + pthread_t self = __pthread_self(); + self->tid = __syscall(SYS_gettid); + self->robust_list.off = 0; + self->robust_list.pending = 0; + self->next = self->prev = self; + __thread_list_lock = 0; + libc.threads_minus_1 = 0; + if (libc.need_locks) libc.need_locks = -1; + } + UNLOCK(__abort_lock); + __aio_atfork(!ret); + __restore_sigs(&set); + __fork_handler(!ret); + return __syscall_ret(ret); +} |