projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| a4fc57ac | 1 | /*- |
| 314a2713 KB |
2 | * Copyright (c) 1983 The Regents of the University of California. |
| 3 | * All rights reserved. | |
| 4 | * | |
| c0567266 KB |
5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions | |
| 7 | * are met: | |
| 8 | * 1. Redistributions of source code must retain the above copyright | |
| 9 | * notice, this list of conditions and the following disclaimer. | |
| 10 | * 2. Redistributions in binary form must reproduce the above copyright | |
| 11 | * notice, this list of conditions and the following disclaimer in the | |
| 12 | * documentation and/or other materials provided with the distribution. | |
| 13 | * 3. All advertising materials mentioning features or use of this software | |
| 14 | * must display the following acknowledgement: | |
| 15 | * This product includes software developed by the University of | |
| 16 | * California, Berkeley and its contributors. | |
| 17 | * 4. Neither the name of the University nor the names of its contributors | |
| 18 | * may be used to endorse or promote products derived from this software | |
| 19 | * without specific prior written permission. | |
| 20 | * | |
| 21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
| 22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| 24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
| 25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
| 26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
| 27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| 28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
| 29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
| 30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
| 31 | * SUCH DAMAGE. | |
| 314a2713 KB |
32 | */ |
| 33 | ||
| 34 | #if defined(LIBC_SCCS) && !defined(lint) | |
| af359dea | 35 | .asciz "@(#)getppid.c 5.2 (Berkeley) 4/12/91" |
| 314a2713 KB |
36 | #endif /* LIBC_SCCS and not lint */ |
| 37 | ||
| 38 | #include "SYS.h" | |
| 39 | ||
| 40 | .data | |
| 41 | .globl mypid, myppid | |
| 42 | myppid: | |
| 43 | .long 0 | |
| 44 | .text | |
| 45 | ||
| 46 | ENTRY(getpid) | |
| 47 | movl myppid,r0 # check cache | |
| 48 | beql doit | |
| 49 | ret | |
| 50 | doit: | |
| 51 | chmk $SYS_getpid | |
| 52 | jcs err | |
| 53 | movl r0,mypid # cache pid | |
| 54 | movl r1,r0 | |
| 55 | movl r0,myppid # set cache | |
| 56 | ret # ppid = getppid(); | |
| 57 | err: | |
| 58 | jmp cerror; |