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| author | Rich Felker <dalias@aerifal.cx> | 2014-06-06 15:29:00 -0400 |
|---|---|---|
| committer | Rich Felker <dalias@aerifal.cx> | 2014-06-06 15:29:00 -0400 |
| commit | 1d348566e6ab446d9c452b1b93aede74368b6618 (patch) | |
| tree | 9f3b972e73192c244c798eac2be44f892d780a38 | |
| parent | abce3156399f30d9b16e198af62af7f7c33fcbe0 (diff) | |
| download | musl-1d348566e6ab446d9c452b1b93aede74368b6618.tar.gz | |
add SOCK_CLOEXEC fallback for socketpair on old kernels
as usual, this is non-atomic, but better than producing an error or
failing to set the close-on-exec flag at all.
| -rw-r--r-- | src/network/socketpair.c | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/src/network/socketpair.c b/src/network/socketpair.c index b15f8467..f3489621 100644 --- a/src/network/socketpair.c +++ b/src/network/socketpair.c @@ -1,7 +1,25 @@ #include <sys/socket.h> +#include <fcntl.h> +#include <errno.h> #include "syscall.h" int socketpair(int domain, int type, int protocol, int fd[2]) { - return socketcall(socketpair, domain, type, protocol, fd, 0, 0); + int r = socketcall(socketpair, domain, type, protocol, fd, 0, 0); + if (r<0 && (errno==EINVAL || errno==EPROTONOSUPPORT) + && (type&(SOCK_CLOEXEC|SOCK_NONBLOCK))) { + r = socketcall(socketpair, domain, + type & ~(SOCK_CLOEXEC|SOCK_NONBLOCK), + protocol, fd, 0, 0); + if (r < 0) return r; + if (type & SOCK_CLOEXEC) { + __syscall(SYS_fcntl, fd[0], F_SETFD, FD_CLOEXEC); + __syscall(SYS_fcntl, fd[1], F_SETFD, FD_CLOEXEC); + } + if (type & SOCK_NONBLOCK) { + __syscall(SYS_fcntl, fd[0], F_SETFL, O_NONBLOCK); + __syscall(SYS_fcntl, fd[1], F_SETFL, O_NONBLOCK); + } + } + return r; } |