| 1 | /* |
| 2 | * Copyright (c) 1980 Regents of the University of California. |
| 3 | * All rights reserved. The Berkeley software License Agreement |
| 4 | * specifies the terms and conditions for redistribution. |
| 5 | * |
| 6 | * @(#)fork_.c 5.1 %G% |
| 7 | */ |
| 8 | |
| 9 | /* |
| 10 | * fork a copy of this process |
| 11 | * |
| 12 | * calling sequence: |
| 13 | * integer fork |
| 14 | * ierror = fork() |
| 15 | * where: |
| 16 | * ierror will be - child pid if parent and successful |
| 17 | * - 0 if child |
| 18 | * - -errno if unsuccessful |
| 19 | */ |
| 20 | |
| 21 | #include "../libI77/fiodefs.h" |
| 22 | |
| 23 | extern int errno; |
| 24 | |
| 25 | long fork_() |
| 26 | { |
| 27 | long i; |
| 28 | |
| 29 | for (i = 0; i < MXUNIT; i++) |
| 30 | flush_(&i); |
| 31 | i = (long)fork(); |
| 32 | if (i < 0) |
| 33 | return((long)(-errno)); |
| 34 | return(i); |
| 35 | } |