procres/print_rlimit.c

This is procres/print_rlimit.c (Listing 36-2, page 758), an example from the book, The Linux Programming Interface.

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printRlimit()

/* print_rlimit.c

   Print the soft and hard values of a specified resource limit.
*/
#include <sys/resource.h>
#include "print_rlimit.h"       /* Declares function defined here */
#include "tlpi_hdr.h"

int                     /* Print 'msg' followed by limits for 'resource' */
printRlimit(const char *msg, int resource)
{
    struct rlimit rlim;

    if (getrlimit(resource, &rlim) == -1)
        return -1;

    printf("%s soft=", msg);
    if (rlim.rlim_cur == RLIM_INFINITY)
        printf("infinite");
#ifdef RLIM_SAVED_CUR           /* Not defined on some implementations */
    else if (rlim.rlim_cur == RLIM_SAVED_CUR)
        printf("unrepresentable");
#endif
    else
        printf("%lld", (long long) rlim.rlim_cur);

    printf("; hard=");
    if (rlim.rlim_max == RLIM_INFINITY)
        printf("infinite\n");
#ifdef RLIM_SAVED_MAX           /* Not defined on some implementations */
    else if (rlim.rlim_max == RLIM_SAVED_MAX)
        printf("unrepresentable");
#endif
    else
        printf("%lld\n", (long long) rlim.rlim_max);

    return 0;
}

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