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1 | /* Copyright (C) 1992, 1995, 1996, 1997 Free Software Foundation, Inc. |
2 | This file is part of the GNU C Library. | |
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3 | Contributed by Ian Lance Taylor (ian@airs.com). |
4 | ||
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5 | The GNU C Library is free software; you can redistribute it and/or |
6 | modify it under the terms of the GNU Library General Public License as | |
7 | published by the Free Software Foundation; either version 2 of the | |
8 | License, or (at your option) any later version. | |
28f540f4 | 9 | |
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10 | The GNU C Library is distributed in the hope that it will be useful, |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Library General Public License for more details. | |
28f540f4 | 14 | |
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15 | You should have received a copy of the GNU Library General Public |
16 | License along with the GNU C Library; see the file COPYING.LIB. If not, | |
17 | write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
18 | Boston, MA 02111-1307, USA. */ | |
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19 | |
20 | /* On Ultrix we can use the getsysinfo call to get the right return | |
21 | value for _SC_CHILD_MAX. Everything else is from <sys/param.h>, | |
22 | which the default sysconf already knows how to handle. */ | |
23 | ||
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24 | #include <unistd.h> |
25 | #include <errno.h> | |
26 | ||
27 | /* This is an Ultrix header file. */ | |
28 | #include <sys/sysinfo.h> | |
29 | ||
c4029823 UD |
30 | extern int __getsysinfo __P ((unsigned int op, void *buffer, |
31 | size_t nbytes, int *start, void *arg)); | |
32 | extern long int __default_sysconf __P ((int name)); | |
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33 | |
34 | long int | |
c4029823 UD |
35 | __sysconf (name) |
36 | int name; | |
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37 | { |
38 | if (name == _SC_CHILD_MAX) | |
39 | { | |
40 | int save = errno; | |
41 | int start = 0; | |
42 | int ret; | |
43 | ||
44 | /* getsysinfo returns the number of values it put into the | |
45 | buffer, or 0 if not available, or -1 on error. */ | |
46 | if (__getsysinfo (GSI_MAX_UPROCS, &ret, sizeof (ret), &start, | |
47 | (void *) 0) > 0) | |
48 | { | |
c4029823 | 49 | __set_errno (save); |
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50 | return ret; |
51 | } | |
52 | ||
c4029823 | 53 | __set_errno (save); |
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54 | } |
55 | ||
56 | return __default_sysconf (name); | |
57 | } | |
58 | ||
59 | #define __sysconf __default_sysconf | |
60 | ||
61 | #include <sysdeps/posix/sysconf.c> |