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991666adc7
libnv used fcntl(fd, F_GETFL) to test whether fd is a valid file descriptor. Aside from being racy, this check requires CAP_FCNTL rights on fd. Instead, use fcntl(fd, F_GETFD), which does not require any capability rights. Also remove some redundant fd_is_valid() checks to avoid extra system calls; in many cases we were performing this check immediately before dup()ing the descriptor. Reviewed by: cem, oshogbo (previous version) MFC after: 2 weeks Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D17963 |
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msgio.c | ||
msgio.h |