read__fixio(): * Try to recover from a read error */ ARGSUSED */
| 124 | */ |
| 125 | /* ARGSUSED */ |
| 126 | private int |
| 127 | read__fixio(int fd __attribute__((__unused__)), int e) |
| 128 | { |
| 129 | |
| 130 | switch (e) { |
| 131 | case -1: /* Make sure that the code is reachable */ |
| 132 | |
| 133 | #ifdef EWOULDBLOCK |
| 134 | case EWOULDBLOCK: |
| 135 | #ifndef TRY_AGAIN |
| 136 | #define TRY_AGAIN |
| 137 | #endif |
| 138 | #endif /* EWOULDBLOCK */ |
| 139 | |
| 140 | #if defined(POSIX) && defined(EAGAIN) |
| 141 | #if defined(EWOULDBLOCK) && EWOULDBLOCK != EAGAIN |
| 142 | case EAGAIN: |
| 143 | #ifndef TRY_AGAIN |
| 144 | #define TRY_AGAIN |
| 145 | #endif |
| 146 | #endif /* EWOULDBLOCK && EWOULDBLOCK != EAGAIN */ |
| 147 | #endif /* POSIX && EAGAIN */ |
| 148 | |
| 149 | e = 0; |
| 150 | #ifdef TRY_AGAIN |
| 151 | #if defined(F_SETFL) && defined(O_NDELAY) |
| 152 | if ((e = fcntl(fd, F_GETFL, 0)) == -1) |
| 153 | return -1; |
| 154 | |
| 155 | if (fcntl(fd, F_SETFL, e & ~O_NDELAY) == -1) |
| 156 | return -1; |
| 157 | else |
| 158 | e = 1; |
| 159 | #endif /* F_SETFL && O_NDELAY */ |
| 160 | |
| 161 | #ifdef FIONBIO |
| 162 | { |
| 163 | int zero = 0; |
| 164 | |
| 165 | if (ioctl(fd, FIONBIO, &zero) == -1) |
| 166 | return -1; |
| 167 | else |
| 168 | e = 1; |
| 169 | } |
| 170 | #endif /* FIONBIO */ |
| 171 | |
| 172 | #endif /* TRY_AGAIN */ |
| 173 | return e ? 0 : -1; |
| 174 | |
| 175 | case EINTR: |
| 176 | return 0; |
| 177 | |
| 178 | default: |
| 179 | return -1; |
| 180 | } |
| 181 | } |
| 182 | |
| 183 |