[apple/libc.git] / tests / stdio.c

#include <stdio.h>
#include <err.h>
#include <errno.h>
#include <unistd.h>
#include <sys/resource.h>

#include <darwintest.h>

#define FILE_LIMIT 100

T_DECL(PR_22813396, "STREAM_MAX is affected by changes to RLIMIT_NOFILE")
{
	struct rlimit theLimit;
	getrlimit( RLIMIT_NOFILE, &theLimit );
	theLimit.rlim_cur = FILE_LIMIT;
	setrlimit( RLIMIT_NOFILE, &theLimit );

	long stream_max = sysconf(_SC_STREAM_MAX);
	T_EXPECT_EQ_LONG(stream_max, (long)FILE_LIMIT, "stream_max = FILE_LIMIT");

	FILE *f;
	for(int i = 3; i < stream_max; i++) {
		if((f = fdopen(0, "r")) == NULL) {
			T_FAIL("Failed after %d streams", i);
		}
	}

	f = fdopen(0, "r");
	T_EXPECT_NULL(f, "fdopen fail after stream_max streams");

	theLimit.rlim_cur = FILE_LIMIT + 1;
	setrlimit( RLIMIT_NOFILE, &theLimit );

	f = fdopen(0, "r");
	T_EXPECT_NOTNULL(f, "fdopen succeed after RLIMIT_NOFILE increased");
}
Commit	Line	Data
974e3884 A	1	#include <stdio.h>
	2	#include <err.h>
	3	#include <errno.h>
	4	#include <unistd.h>
	5	#include <sys/resource.h>
	6
	7	#include <darwintest.h>
	8
	9	#define FILE_LIMIT 100
	10
	11	T_DECL(PR_22813396, "STREAM_MAX is affected by changes to RLIMIT_NOFILE")
	12	{
	13	struct rlimit theLimit;
	14	getrlimit( RLIMIT_NOFILE, &theLimit );
	15	theLimit.rlim_cur = FILE_LIMIT;
	16	setrlimit( RLIMIT_NOFILE, &theLimit );
	17
	18	long stream_max = sysconf(_SC_STREAM_MAX);
	19	T_EXPECT_EQ_LONG(stream_max, (long)FILE_LIMIT, "stream_max = FILE_LIMIT");
	20
	21	FILE *f;
	22	for(int i = 3; i < stream_max; i++) {
	23	if((f = fdopen(0, "r")) == NULL) {
	24	T_FAIL("Failed after %d streams", i);
	25	}
	26	}
	27
	28	f = fdopen(0, "r");
	29	T_EXPECT_NULL(f, "fdopen fail after stream_max streams");
	30
	31	theLimit.rlim_cur = FILE_LIMIT + 1;
	32	setrlimit( RLIMIT_NOFILE, &theLimit );
	33
	34	f = fdopen(0, "r");
	35	T_EXPECT_NOTNULL(f, "fdopen succeed after RLIMIT_NOFILE increased");
	36	}