diff options
Diffstat (limited to 'erts/emulator/drivers/unix')
| -rw-r--r-- | erts/emulator/drivers/unix/unix_efile.c | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/erts/emulator/drivers/unix/unix_efile.c b/erts/emulator/drivers/unix/unix_efile.c index 4b3934657c..5b001b3819 100644 --- a/erts/emulator/drivers/unix/unix_efile.c +++ b/erts/emulator/drivers/unix/unix_efile.c @@ -33,6 +33,9 @@ #include <sys/types.h> #include <sys/uio.h> #endif +#if defined(__linux__) || (defined(__sun) && defined(__SVR4)) +#include <sys/sendfile.h> +#endif #if defined(__APPLE__) && defined(__MACH__) && !defined(__DARWIN__) #define DARWIN 1 @@ -1464,3 +1467,44 @@ efile_fadvise(Efile_error* errInfo, int fd, Sint64 offset, return check_error(0, errInfo); #endif } + +#ifdef HAVE_SENDFILE +int +efile_sendfile(Efile_error* errInfo, int in_fd, int out_fd, + off_t *offset, size_t *count) +{ +#if defined(__linux__) || (defined(__sun) && defined(__SVR4)) + ssize_t retval = sendfile(out_fd, in_fd, offset, *count); + if (retval >= 0) { + if (retval != *count) { + *count = retval; + retval = -1; + errno = EAGAIN; + } else { + *count = retval; + } + } else if (retval == -1 && (errno == EINTR || errno == EAGAIN)) { + *count = 0; + } + return check_error(retval == -1 ? -1 : 0, errInfo); +#elif defined(DARWIN) + off_t len = *count; + int retval = sendfile(in_fd, out_fd, *offset, &len, NULL, 0); + *count = len; + return check_error(retval, errInfo); +#elif defined(__FreeBSD__) || defined(__DragonFly__) + off_t len = 0; + int retval = sendfile(in_fd, out_fd, *offset, *count, NULL, &len, 0); + *count = len; + return check_error(retval, errInfo); +#endif +} +#else /* no sendfile() */ +int +efile_sendfile(Efile_error* errInfo, int in_fd, int out_fd, + off_t *offset, size_t *count) +{ + errno = ENOTSUP; + return check_error(-1, errInfo); +} +#endif |