| … | |
… | |
| 942 | |
942 | |
| 943 | /* sendfile always needs emulation */ |
943 | /* sendfile always needs emulation */ |
| 944 | static ssize_t |
944 | static ssize_t |
| 945 | eio__sendfile (int ofd, int ifd, off_t offset, size_t count, etp_worker *self) |
945 | eio__sendfile (int ofd, int ifd, off_t offset, size_t count, etp_worker *self) |
| 946 | { |
946 | { |
|
|
947 | ssize_t written = 0; |
| 947 | ssize_t res; |
948 | ssize_t res; |
| 948 | |
949 | |
| 949 | if (!count) |
950 | if (!count) |
| 950 | return 0; |
951 | return 0; |
| 951 | |
952 | |
|
|
953 | for (;;) |
|
|
954 | { |
| 952 | #if HAVE_SENDFILE |
955 | #if HAVE_SENDFILE |
| 953 | # if __linux |
956 | # if __linux |
|
|
957 | off_t soffset = offset; |
| 954 | res = sendfile (ofd, ifd, &offset, count); |
958 | res = sendfile (ofd, ifd, &soffset, count); |
| 955 | |
959 | |
| 956 | # elif __FreeBSD__ |
960 | # elif __FreeBSD__ |
| 957 | /* |
961 | /* |
| 958 | * Of course, the freebsd sendfile is a dire hack with no thoughts |
962 | * Of course, the freebsd sendfile is a dire hack with no thoughts |
| 959 | * wasted on making it similar to other I/O functions. |
963 | * wasted on making it similar to other I/O functions. |
| 960 | */ |
964 | */ |
| 961 | { |
|
|
| 962 | off_t sbytes; |
965 | off_t sbytes; |
| 963 | res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0); |
966 | res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0); |
| 964 | |
967 | |
| 965 | #if 0 /* according to the manpage, this is correct, but broken behaviour */ |
968 | #if 0 /* according to the manpage, this is correct, but broken behaviour */ |
| 966 | /* freebsd' sendfile will return 0 on success */ |
969 | /* freebsd' sendfile will return 0 on success */ |
| 967 | /* freebsd 8 documents it as only setting *sbytes on EINTR and EAGAIN, but */ |
970 | /* freebsd 8 documents it as only setting *sbytes on EINTR and EAGAIN, but */ |
| 968 | /* not on e.g. EIO or EPIPE - sounds broken */ |
971 | /* not on e.g. EIO or EPIPE - sounds broken */ |
| 969 | if ((res < 0 && (errno == EAGAIN || errno == EINTR) && sbytes) || res == 0) |
972 | if ((res < 0 && (errno == EAGAIN || errno == EINTR) && sbytes) || res == 0) |
| 970 | res = sbytes; |
973 | res = sbytes; |
| 971 | #endif |
974 | #endif |
| 972 | |
975 | |
| 973 | /* according to source inspection, this is correct, and useful behaviour */ |
976 | /* according to source inspection, this is correct, and useful behaviour */ |
| 974 | if (sbytes) |
977 | if (sbytes) |
| 975 | res = sbytes; |
978 | res = sbytes; |
| 976 | } |
|
|
| 977 | |
979 | |
| 978 | # elif defined (__APPLE__) |
980 | # elif defined (__APPLE__) |
| 979 | |
|
|
| 980 | { |
|
|
| 981 | off_t sbytes = count; |
981 | off_t sbytes = count; |
| 982 | res = sendfile (ifd, ofd, offset, &sbytes, 0, 0); |
982 | res = sendfile (ifd, ofd, offset, &sbytes, 0, 0); |
| 983 | |
983 | |
| 984 | /* according to the manpage, sbytes is always valid */ |
984 | /* according to the manpage, sbytes is always valid */ |
| 985 | if (sbytes) |
985 | if (sbytes) |
| 986 | res = sbytes; |
986 | res = sbytes; |
| 987 | } |
|
|
| 988 | |
987 | |
| 989 | # elif __hpux |
988 | # elif __hpux |
| 990 | res = sendfile (ofd, ifd, offset, count, 0, 0); |
989 | res = sendfile (ofd, ifd, offset, count, 0, 0); |
| 991 | |
990 | |
| 992 | # elif __solaris |
991 | # elif __solaris |
| 993 | { |
|
|
| 994 | struct sendfilevec vec; |
992 | struct sendfilevec vec; |
| 995 | size_t sbytes; |
993 | size_t sbytes; |
| 996 | |
994 | |
| 997 | vec.sfv_fd = ifd; |
995 | vec.sfv_fd = ifd; |
| 998 | vec.sfv_flag = 0; |
996 | vec.sfv_flag = 0; |
| 999 | vec.sfv_off = offset; |
997 | vec.sfv_off = offset; |
| 1000 | vec.sfv_len = count; |
998 | vec.sfv_len = count; |
| 1001 | |
999 | |
| 1002 | res = sendfilev (ofd, &vec, 1, &sbytes); |
1000 | res = sendfilev (ofd, &vec, 1, &sbytes); |
| 1003 | |
1001 | |
| 1004 | if (res < 0 && sbytes) |
1002 | if (res < 0 && sbytes) |
| 1005 | res = sbytes; |
1003 | res = sbytes; |
| 1006 | } |
|
|
| 1007 | |
1004 | |
| 1008 | # endif |
1005 | # endif |
| 1009 | |
1006 | |
| 1010 | #elif defined (_WIN32) |
1007 | #elif defined (_WIN32) |
| 1011 | |
|
|
| 1012 | /* does not work, just for documentation of what would need to be done */ |
1008 | /* does not work, just for documentation of what would need to be done */ |
| 1013 | { |
|
|
| 1014 | HANDLE h = TO_SOCKET (ifd); |
1009 | HANDLE h = TO_SOCKET (ifd); |
| 1015 | SetFilePointer (h, offset, 0, FILE_BEGIN); |
1010 | SetFilePointer (h, offset, 0, FILE_BEGIN); |
| 1016 | res = TransmitFile (TO_SOCKET (ofd), h, count, 0, 0, 0, 0); |
1011 | res = TransmitFile (TO_SOCKET (ofd), h, count, 0, 0, 0, 0); |
| 1017 | } |
|
|
| 1018 | |
1012 | |
| 1019 | #else |
1013 | #else |
| 1020 | res = -1; |
1014 | res = -1; |
| 1021 | errno = ENOSYS; |
1015 | errno = ENOSYS; |
| 1022 | #endif |
1016 | #endif |
| 1023 | |
1017 | |
|
|
1018 | /* we assume sendfile can copy at least 128mb in one go */ |
|
|
1019 | if (res <= 128 * 1024 * 1024) |
|
|
1020 | { |
|
|
1021 | if (res > 0) |
|
|
1022 | written += res; |
|
|
1023 | |
|
|
1024 | if (written) |
|
|
1025 | return written; |
|
|
1026 | |
|
|
1027 | break; |
|
|
1028 | } |
|
|
1029 | else |
|
|
1030 | { |
|
|
1031 | /* if we requested more, then probably the kernel was lazy */ |
|
|
1032 | written += res; |
|
|
1033 | offset += res; |
|
|
1034 | count -= res; |
|
|
1035 | |
|
|
1036 | if (!count) |
|
|
1037 | return written; |
|
|
1038 | } |
|
|
1039 | } |
|
|
1040 | |
| 1024 | if (res < 0 |
1041 | if (res < 0 |
| 1025 | && (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK |
1042 | && (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK |
| 1026 | /* BSDs */ |
1043 | /* BSDs */ |
| 1027 | #ifdef ENOTSUP /* sigh, if the steenking pile called openbsd would only try to at least compile posix code... */ |
1044 | #ifdef ENOTSUP /* sigh, if the steenking pile called openbsd would only try to at least compile posix code... */ |
| 1028 | || errno == ENOTSUP |
1045 | || errno == ENOTSUP |
| 1029 | #endif |
1046 | #endif |
