getrlimit.c

该代码为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);
}