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27 lines
702 B
C++
27 lines
702 B
C++
#pragma once
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#include <sys/syscall.h>
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#include <linux/fcntl.h>
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#include <unistd.h>
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#include <cerrno>
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#include <cstdio>
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static inline int sigtimedwait(const sigset_t* set, siginfo_t* info, const timespec* timeout) {
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union {
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sigset_t set;
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sigset_t set64;
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} s{};
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s.set = *set;
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return syscall(__NR_rt_sigtimedwait, &s.set64, info, timeout, sizeof(sigset64_t));
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}
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static inline int fexecve(int fd, char* const* argv, char* const* envp) {
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syscall(__NR_execveat, fd, "", argv, envp, AT_EMPTY_PATH);
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if (errno == ENOSYS) {
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char buf[256];
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std::snprintf(buf, sizeof(buf), "/proc/self/fd/%d", fd);
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execve(buf, argv, envp);
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}
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return -1;
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}
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