musl/src/signal/raise.c

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#include <signal.h>
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#include <errno.h>
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#include "syscall.h"
int __sigprocmask(int, const sigset_t *, sigset_t *);
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int raise(int sig)
{
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int pid, tid, ret;
sigset_t set;
sigfillset(&set);
__sigprocmask(SIG_BLOCK, &set, &set);
tid = syscall(SYS_gettid);
pid = syscall(SYS_getpid);
ret = syscall(SYS_tgkill, pid, tid, sig);
__sigprocmask(SIG_SETMASK, &set, 0);
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return ret;
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}