Commit 2886ce96 authored by Yang Tse's avatar Yang Tse
Browse files

Verify if the test is limited by an ancient stdio with a 256 

open file limit.  In this case the test is skipped with a
message showing this limitation when the number of open files
needed for the test is greater than 256.
parent 3344142b

tests/libtest/lib518.c

+35 −0
Original line number Diff line number Diff line
@@ -65,6 +65,29 @@ static void close_file_descriptors(void) 
  fd = NULL;

}



static int stdio_limit_256(void)

{

  FILE *fpa[300];

  int i;

  int ret = 0;



  for (i = 0; i < 300; i++) {

    fpa[i] = NULL;

  }

  for (i = 0; i < 300; i++) {

    fpa[i] = fopen(DEV_NULL, "r");

    if (fpa[i] == NULL) {

      ret = -1;

      break;

    }

  }

  for (i = 0; i < 300; i++) {

    if (fpa[i] != NULL)

      fclose(fpa[i]);

  }

  return ret;

}



static int rlimit(int keep_open)

{

  int nitems, i;
@@ -235,6 +258,18 @@ static int rlimit(int keep_open) 


  num_open.rlim_max = NUM_OPEN;



  /* verify that we don't have an ancient stdio */



  if (((size_t)(num_open.rlim_max) > (size_t)256) && stdio_limit_256()) {

    sprintf(strbuff1, fmt, num_open.rlim_max);

    sprintf(strbuff, "fds needed %s > stdio limit 256",

            strbuff1);

    store_errmsg(strbuff, 0);

    fprintf(stderr, "%s\n", msgbuff);

    free(memchunk);

    return -12;

  }



  /* verify that we won't overflow size_t in malloc() */



  if ((size_t)(num_open.rlim_max) > ((size_t)-1) / sizeof(*fd)) {

tests/libtest/lib537.c

+35 −0
Original line number Diff line number Diff line
@@ -67,6 +67,29 @@ static void close_file_descriptors(void) 
  fd = NULL;

}



static int stdio_limit_256(void)

{

  FILE *fpa[300];

  int i;

  int ret = 0;



  for (i = 0; i < 300; i++) {

    fpa[i] = NULL;

  }

  for (i = 0; i < 300; i++) {

    fpa[i] = fopen(DEV_NULL, "r");

    if (fpa[i] == NULL) {

      ret = -1;

      break;

    }

  }

  for (i = 0; i < 300; i++) {

    if (fpa[i] != NULL)

      fclose(fpa[i]);

  }

  return ret;

}



static int rlimit(int keep_open)

{

  int *tmpfd;
@@ -225,6 +248,18 @@ static int rlimit(int keep_open) 
    num_open.rlim_max = nitems;

  }



  /* verify that we don't have an ancient stdio */



  if (((size_t)(num_open.rlim_max) > (size_t)256) && stdio_limit_256()) {

    sprintf(strbuff1, fmt, num_open.rlim_max);

    sprintf(strbuff, "fds needed %s > stdio limit 256",

            strbuff1);

    store_errmsg(strbuff, 0);

    fprintf(stderr, "%s\n", msgbuff);

    free(memchunk);

    return -10;

  }



  /* verify that we won't overflow size_t in malloc() */



  if ((size_t)(num_open.rlim_max) > ((size_t)-1) / sizeof(*fd)) {