source: git/Singular/rlimit.c @ ff8e86

jengelh-datetimespielwiese
Last change on this file since ff8e86 was ff8e86, checked in by Andreas Steenpass <steenpass@…>, 9 years ago
fix: avoid int overflow in rlimit.c (cherry picked from commit 6ace3051babf6d4083ff3aabc1f7e6885356e220) Signed-off-by: Andreas Steenpass <steenpass@mathematik.uni-kl.de>
  • Property mode set to 100644
File size: 1.1 KB
Line 
1/****************************************
2 * Computer Algebra System SINGULAR     *
3 ****************************************/
4/***************************************************************
5 * File:    rlimit.c
6 * Purpose: set resource limits
7 ***************************************************************/
8
9#include <stdint.h>
10#include <sys/resource.h>
11
12#include "rlimit.h"
13
14/* raise the maximum number of processes (or threads),
15 * return  0 on success,
16 *        -1 on error
17 */
18int raise_rlimit_nproc()
19{
20#ifdef RLIMIT_NPROC
21  struct rlimit nproc;
22  getrlimit(RLIMIT_NPROC, &nproc);
23  if (nproc.rlim_cur == RLIM_INFINITY
24      || (nproc.rlim_max != RLIM_INFINITY && nproc.rlim_cur >= nproc.rlim_max))
25  {
26    return(-1);
27  }
28  if (nproc.rlim_cur < 512)
29  {
30    nproc.rlim_cur = 512;
31  }
32  if ((nproc.rlim_max == RLIM_INFINITY || 2*nproc.rlim_cur <= nproc.rlim_max)
33      && nproc.rlim_cur < 65536)
34  {
35    nproc.rlim_cur = 2*nproc.rlim_cur;
36  }
37  else
38  {
39    nproc.rlim_cur = nproc.rlim_max;
40  }
41  int res = setrlimit(RLIMIT_NPROC, &nproc);
42  return(res);
43#else
44  return(-1);
45#endif
46}
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