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d8875586 MBT |
1 | ?RCS: $Id: d_NOFILE.U 1 2006-08-24 12:32:52Z rmanfredi $ |
2 | ?RCS: | |
3 | ?RCS: Copyright (c) 1991-1997, 2004-2006, Raphael Manfredi | |
4 | ?RCS: | |
5 | ?RCS: You may redistribute only under the terms of the Artistic Licence, | |
6 | ?RCS: as specified in the README file that comes with the distribution. | |
7 | ?RCS: You may reuse parts of this distribution only within the terms of | |
8 | ?RCS: that same Artistic Licence; a copy of which may be found at the root | |
9 | ?RCS: of the source tree for dist 4.0. | |
10 | ?RCS: | |
11 | ?RCS: $Log: d_NOFILE.U,v $ | |
12 | ?RCS: Revision 3.0.1.1 1994/10/29 16:08:38 ram | |
13 | ?RCS: patch36: added ?F: line for metalint file checking | |
14 | ?RCS: | |
15 | ?RCS: Revision 3.0 1993/08/18 12:05:39 ram | |
16 | ?RCS: Baseline for dist 3.0 netwide release. | |
17 | ?RCS: | |
18 | ?MAKE:nofile d_gettblsz tablesize: Myread Guess cat +cc +ccflags +libs \ | |
19 | test rm Csym | |
20 | ?MAKE: -pick add $@ %< | |
21 | ?S:nofile: | |
22 | ?S: This variable contains the number of file descriptors available to the | |
23 | ?S: process. | |
24 | ?S:. | |
25 | ?S:d_gettblsz: | |
26 | ?S: This variable conditionally handles remapping of the getdtablesize() | |
27 | ?S: subroutine to ulimit(4,0), or the NOFILE manifest constant. | |
28 | ?S:. | |
29 | ?S:tablesize: | |
30 | ?S: This variable contains either the 'NOFILE' constant or 'ulimit(4, 0L)' | |
31 | ?S: and is used as the remapped value for the getdtablesize() macro. | |
32 | ?S:. | |
33 | ?C:getdtablesize: | |
34 | ?C: This catches use of the getdtablesize() subroutine, and remaps it | |
35 | ?C: to either ulimit(4,0) or NOFILE, if getdtablesize() isn't available. | |
36 | ?C:. | |
37 | ?C:VAL_NOFILE: | |
38 | ?C: This symbol contains the number of file descriptors available to the | |
39 | ?C: process, as determined at configuration time. Unless a static constant | |
40 | ?C: is needed, you should rely on getdtablesize() to obtain that number. | |
41 | ?C:. | |
42 | ?H:#$d_gettblsz getdtablesize() $tablesize /**/ | |
43 | ?H:#define VAL_NOFILE $nofile /* Number of file descriptors */ | |
44 | ?H:. | |
45 | ?F:!nofile | |
46 | ?T:d_ulimit4 val | |
47 | : see if getdtablesize exists | |
48 | echo " " | |
49 | ?X: Revert logical value (d_gettblsz is undef iff getdtablesize is present) | |
50 | case "$d_gettblsz" in | |
51 | $define) d_gettblsz="$undef";; | |
52 | $undef) d_gettblsz="$define";; | |
53 | esac | |
54 | if set getdtablesize val -f d_gettblsz; eval $csym; $val; then | |
55 | echo 'getdtablesize() found.' >&4 | |
56 | d_gettblsz="$undef" | |
57 | tablesize='' | |
58 | @if VAL_NOFILE || nofile | |
59 | $cat >nofile.c <<'EOCP' | |
60 | #include <stdio.h> | |
61 | int main() | |
62 | { | |
63 | printf("%d\n", getdtablesize()); | |
64 | } | |
65 | EOCP | |
66 | nofile='' | |
67 | if $cc $ccflags -o nofile nofile.c $libs >/dev/null 2>&1; then | |
68 | nofile=`./nofile 2>/dev/null` | |
69 | fi | |
70 | if $test "$nofile"; then | |
71 | echo "(You have $nofile file descriptors available per process.)" | |
72 | else | |
73 | nofile='20' | |
74 | if ./bsd; then | |
75 | nofile='64' | |
76 | fi | |
77 | echo "(Hmm... Let's say you have $nofile file descriptors available.)" | |
78 | fi | |
79 | @end | |
80 | else | |
81 | echo 'getdtablesize() NOT found...' >&4 | |
82 | if set ulimit val -f; eval $csym; $val; then | |
83 | echo 'Maybe ulimit(4,0) will work...' | |
84 | $cat >nofile.c <<'EOCP' | |
85 | #include <stdio.h> | |
86 | #ifdef GETPARAM_H | |
87 | #include <sys/param.h> | |
88 | #endif | |
89 | int main() | |
90 | { | |
91 | printf("%d %d\n", | |
92 | #ifdef NOFILE | |
93 | NOFILE, | |
94 | #else | |
95 | 0, | |
96 | #endif | |
97 | ulimit(4,0)); | |
98 | exit(0); | |
99 | } | |
100 | EOCP | |
101 | if $cc $ccflags -DGETPARAM_H -o nofile nofile.c $libs >/dev/null 2>&1 \ | |
102 | || $cc $ccflags -o nofile nofile.c $libs >/dev/null 2>&1 ; then | |
103 | set `./nofile` | |
104 | d_gettblsz=$1 | |
105 | d_ulimit4=$2 | |
106 | if $test "$d_ulimit4" -lt 0; then | |
107 | echo "Your ulimit() call doesn't tell me what I want to know." | |
108 | echo "We'll just use NOFILE in this case." | |
109 | nofile=$d_gettblsz | |
110 | d_gettblsz="$define" | |
111 | tablesize='NOFILE' | |
112 | else | |
113 | if $test "$d_gettblsz" -gt 0; then | |
114 | echo "Your system defines NOFILE to be $d_gettblsz, and" >&4 | |
115 | else | |
116 | echo "I had trouble getting NOFILE from your system, but" >&4 | |
117 | fi | |
118 | echo "ulimit returns $d_ulimit4 as the number of available file descriptors." >&4 | |
119 | dflt='y'; | |
120 | echo " " | |
121 | rp='Should I use ulimit to get the number of available file descriptors?' | |
122 | . ./myread | |
123 | case "$ans" in | |
124 | y*) | |
125 | nofile=$d_ulimit4 | |
126 | d_gettblsz="$define" | |
127 | tablesize='ulimit(4, 0L)' | |
128 | echo "Using ulimit(4,0)." | |
129 | ;; | |
130 | *) | |
131 | nofile=$d_gettblsz | |
132 | d_gettblsz="$define" | |
133 | tablesize='NOFILE' | |
134 | echo "Using NOFILE." | |
135 | ;; | |
136 | esac | |
137 | fi | |
138 | else | |
139 | echo "Strange, I couldn't get my test program to compile." | |
140 | echo "We'll just use NOFILE in this case." | |
141 | d_gettblsz="$define" | |
142 | tablesize='NOFILE' | |
143 | nofile='' | |
144 | fi | |
145 | else | |
146 | echo 'Using NOFILE instead.' | |
147 | d_gettblsz="$define" | |
148 | tablesize='NOFILE' | |
149 | nofile='' | |
150 | fi | |
151 | fi | |
152 | @if VAL_NOFILE || nofile | |
153 | case "$nofile" in | |
154 | '') | |
155 | $cat >nofile.c <<'EOCP' | |
156 | #include <stdio.h> | |
157 | #ifdef GETPARAM_H | |
158 | #include <sys/param.h> | |
159 | #endif | |
160 | int main() | |
161 | { | |
162 | printf("%d\n", | |
163 | #ifdef NOFILE | |
164 | NOFILE, | |
165 | #else | |
166 | 0, | |
167 | #endif | |
168 | ); | |
169 | exit(0); | |
170 | } | |
171 | EOCP | |
172 | if $cc $ccflags -DGETPARAM_H -o nofile nofile.c $libs >/dev/null 2>&1 \ | |
173 | || $cc $ccflags -o nofile nofile.c $libs >/dev/null 2>&1 ; then | |
174 | nofile=`./nofile 2>/dev/null` | |
175 | fi | |
176 | if $test "$nofile"; then | |
177 | echo "(You have $nofile file descriptors available per process.)" | |
178 | else | |
179 | nofile='20' | |
180 | if ./bsd; then | |
181 | nofile='64' | |
182 | fi | |
183 | echo "(Hmm... Let's say you have $nofile file descriptors available.)" | |
184 | fi | |
185 | ;; | |
186 | esac | |
187 | @end | |
188 | $rm -f nofile* | |
189 |