getrlimit.c

unix环境高级编程的源代码

#include    <sys/types.h>
#include    <sys/time.h>
#include    <sys/resource.h>
#include    "ourhdr.h"

#define    doit(name)    pr_limits(#name, name)

static void    pr_limits(char *, int);

int
main(void)
{
    doit(RLIMIT_CORE);
    doit(RLIMIT_CPU);
    doit(RLIMIT_DATA);
    doit(RLIMIT_FSIZE);
#ifdef    RLIMIT_MEMLOCK
    doit(RLIMIT_MEMLOCK);
#endif
#ifdef    RLIMIT_NOFILE    /* SVR4 name */
    doit(RLIMIT_NOFILE);
#endif
#ifdef    RLIMIT_OFILE    /* 44BSD name */
    doit(RLIMIT_OFILE);
#endif
#ifdef    RLIMIT_NPROC
    doit(RLIMIT_NPROC);
#endif
#ifdef    RLIMIT_RSS
    doit(RLIMIT_RSS);
#endif
    doit(RLIMIT_STACK);
#ifdef    RLIMIT_VMEM
    doit(RLIMIT_VMEM);
#endif
    exit(0);
}

static void
pr_limits(char *name, int resource)
{
    struct rlimit    limit;

    if (getrlimit(resource, &limit) < 0)
        err_sys("getrlimit error for %s", name);
    printf("%-14s  ", name);
    if (limit.rlim_cur == RLIM_INFINITY)
        printf("(infinite)  ");
    else
        printf("%10ld  ", limit.rlim_cur);
    if (limit.rlim_max == RLIM_INFINITY)
        printf("(infinite)\n");
    else
        printf("%10ld\n", limit.rlim_max);
}