Feature #9328 ยป 0001-avoid-redundant-F_GETFD-when-O_CLOEXEC-works.patch
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rb_update_max_fd(fd);
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}
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/* this is only called once */
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static int
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rb_fix_detect_o_cloexec(int fd)
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{
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#ifdef O_CLOEXEC
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int flags = fcntl(fd, F_GETFD);
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if (flags == -1)
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rb_bug("rb_fix_detect_o_cloexec: fcntl(%d, F_GETFD) failed: %s", fd, strerror(errno));
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if (flags & FD_CLOEXEC)
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return 1;
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#endif /* fall through if O_CLOEXEC does not work: */
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rb_maygvl_fd_fix_cloexec(fd);
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return 0;
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}
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int
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rb_cloexec_open(const char *pathname, int flags, mode_t mode)
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{
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int ret;
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static int o_cloexec_state = -1; /* <0: unknown, 0: ignored, >0: working */
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#ifdef O_CLOEXEC
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/* O_CLOEXEC is available since Linux 2.6.23. Linux 2.6.18 silently ignore it. */
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flags |= O_CLOEXEC;
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| ... | ... | |
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#endif
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ret = open(pathname, flags, mode);
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if (ret == -1) return -1;
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rb_maygvl_fd_fix_cloexec(ret);
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if (ret <= 2 || o_cloexec_state == 0) {
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rb_maygvl_fd_fix_cloexec(ret);
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} else if (o_cloexec_state > 0) {
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return ret;
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} else {
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o_cloexec_state = rb_fix_detect_o_cloexec(ret);
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}
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return ret;
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}
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