print OS 软限制和硬限制的值

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一源代码

1 #include "apue.h"
2 #include <sys/resource.h>
3
4 #define doit(name) pr_limits(#name, name)
5
6 static void pr_limits(char *, int);
7
8 int main(void)
9 {
10 #ifdef RLIMIT_AS
11 doit(RLIMIT_AS);
12 #endif
13
14 doit(RLIMIT_CORE);
15 doit(RLIMIT_CPU);
16 doit(RLIMIT_DATA);
17 doit(RLIMIT_FSIZE);
18 #ifdef RLIMIT_MEMLOCK
19 doit(RLIMIT_MEMLOCK);
20 #endif
21
22 #ifdef RLIMIT_MSGQUEUE
23 doit(RLIMIT_MSGQUEUE);
24 #endif
25
26 #ifdef RLIMIT_RICE
27 doit(RLIMIT_RICE);
28 #endif
29
30 doit(RLIMIT_NOFILE);
31
32 #ifdef RLIMIT_NPTS
33 doit(RLIMIT_NPRS);
34 #endif
35
36 #ifdef RLIMIT_RSS
37 doit(RLIMIT_RSS);
38 #endif
39
40 #ifdef RLIMIT_SBSSIZE
41 doit(RLIMT_SBSSIZE);
42 #endif
43
44 #ifdef RLIMIT_SIGPENDING
45 doit(RLIMIT_SIGPENDING);
46 #endif
47
48 doit(RLIMIT_STACK);
49
50 #ifdef RLIMIT_VMEM
51 doit(RLIMIT_VMEM);
52 #endif
53
54 exit (0);
55 }
56
57
58 static void
59 pr_limits(char *name, int resource)
60 {
61 struct rlimit limit;
62 unsigned long long lim;
63
64 if (getrlimit(resource,&limit) < 0)
65 err_sys("getrlimit error for %s",name);
66 printf("%-14s ",name);
67 if (limit.rlim_cur == RLIM_INFINITY)
68 printf("(infinite) ");
69 else{
70 lim = limit.rlim_cur;
71 printf("(infinite) ");
72 }
73
74 if (limit.rlim_max == RLIM_INFINITY)
75 printf("(infinite)");
76 else{
77 lim = limit.rlim_max;
78 printf("%10lld",lim);
79 }
80 putchar((int) '\n');
81
82 }

在linux上运行结果：

RLIMIT_AS (infinite) (infinite)
RLIMIT_CORE (infinite) (infinite)
RLIMIT_CPU (infinite) (infinite)
RLIMIT_DATA (infinite) (infinite)
RLIMIT_FSIZE (infinite) (infinite)
RLIMIT_MEMLOCK (infinite) 65536
RLIMIT_MSGQUEUE (infinite) 819200
RLIMIT_NOFILE (infinite) 1024
RLIMIT_RSS (infinite) (infinite)
RLIMIT_SIGPENDING (infinite) 256701
RLIMIT_STACK (infinite) (infinite)

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