diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/3rdparty/forkfd/forkfd.c | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/src/3rdparty/forkfd/forkfd.c b/src/3rdparty/forkfd/forkfd.c index e942db2717..51223aef1f 100644 --- a/src/3rdparty/forkfd/forkfd.c +++ b/src/3rdparty/forkfd/forkfd.c @@ -54,6 +54,9 @@ # define HAVE_PIPE2 1 # endif #endif +#if defined(__FreeBSD__) && __FreeBSD__ >= 9 +# include <sys/procdesc.h> +#endif #if _POSIX_VERSION-0 >= 200809L || _XOPEN_VERSION-0 >= 500 # define HAVE_WAITID 1 @@ -506,6 +509,46 @@ static int create_pipe(int filedes[], int flags) return ret; } +#if defined(FORKFD_NO_SPAWNFD) && defined(__FreeBSD__) && __FreeBSD__ >= 9 +# if __FreeBSD__ == 9 +/* PROCDESC is an optional feature in the kernel and wasn't enabled + * by default on FreeBSD 9. So we need to check for it at runtime. */ +static ffd_atomic_int system_has_forkfd = FFD_ATOMIC_INIT(1); +# else +/* On FreeBSD 10, PROCDESC was enabled by default. On v11, it's not an option + * anymore and can't be disabled. */ +static const int system_has_forkfd = 1; +# endif + +static int system_forkfd(int flags, pid_t *ppid) +{ + int ret; + pid_t pid; + pid = pdfork(&ret, PD_DAEMON); + if (__builtin_expect(pid == -1, 0)) { +# if __FreeBSD__ == 9 + if (errno == ENOSYS) { + /* PROCDESC wasn't compiled into the kernel: don't try it again. */ + ffd_atomic_store(&system_has_forkfd, 0, FFD_ATOMIC_RELAXED); + } +# endif + return -1; + } + if (pid == 0) { + /* child process */ + return FFD_CHILD_PROCESS; + } + + /* parent process */ + if (flags & FFD_CLOEXEC) + fcntl(ret, F_SETFD, FD_CLOEXEC); + if (flags & FFD_NONBLOCK) + fcntl(ret, F_SETFL, fcntl(ret, F_GETFL) | O_NONBLOCK); + if (ppid) + *ppid = pid; + return ret; +} +#else static const int system_has_forkfd = 0; static int system_forkfd(int flags, pid_t *ppid) { @@ -513,6 +556,7 @@ static int system_forkfd(int flags, pid_t *ppid) (void)ppid; return -1; } +#endif #ifndef FORKFD_NO_FORKFD /** @@ -748,6 +792,26 @@ int forkfd_wait(int ffd, forkfd_info *info, struct rusage *rusage) struct pipe_payload payload; int ret; + if (system_has_forkfd) { +#if defined(__FreeBSD__) && __FreeBSD__ >= 9 + pid_t pid; + int status; + int options = WEXITED; + + ret = pdgetpid(ffd, &pid); + if (ret == -1) + return ret; + ret = fcntl(ffd, F_GETFL); + if (ret == -1) + return ret; + options |= (ret & O_NONBLOCK) ? WNOHANG : 0; + ret = wait4(pid, &status, options, rusage); + if (ret != -1 && info) + convertStatusToForkfdInfo(status, info); + return ret == -1 ? -1 : 0; +#endif + } + ret = read(ffd, &payload, sizeof(payload)); if (ret == -1) return ret; /* pass errno, probably EINTR, EBADF or EWOULDBLOCK */ |