src/test/test-rlimit-util.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 /***
   3   This file is part of systemd
   4
   5   systemd is free software; you can redistribute it and/or modify it
   6   under the terms of the GNU Lesser General Public License as published by
   7   the Free Software Foundation; either version 2.1 of the License, or
   8   (at your option) any later version.
   9
  10   systemd is distributed in the hope that it will be useful, but
  11   WITHOUT ANY WARRANTY; without even the implied warranty of
  12   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  13   Lesser General Public License for more details.
  14
  15   You should have received a copy of the GNU Lesser General Public License
  16   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  17 ***/
  18
  19 #include <sys/resource.h>
  20
  21 #include "alloc-util.h"
  22 #include "capability-util.h"
  23 #include "macro.h"
  24 #include "rlimit-util.h"
  25 #include "string-util.h"
  26 #include "util.h"
  27
  28 static void test_rlimit_parse_format(int resource, const char *string, rlim_t soft, rlim_t hard, int ret, const char *formatted) {
  29         _cleanup_free_ char *f = NULL;
  30         struct rlimit rl = {
  31                 .rlim_cur = 4711,
  32                 .rlim_max = 4712,
  33         }, rl2 = {
  34                 .rlim_cur = 4713,
  35                 .rlim_max = 4714
  36         };
  37
  38         assert_se(rlimit_parse(resource, string, &rl) == ret);
  39         if (ret < 0)
  40                 return;
  41
  42         assert_se(rl.rlim_cur == soft);
  43         assert_se(rl.rlim_max == hard);
  44
  45         assert_se(rlimit_format(&rl, &f) >= 0);
  46         assert_se(streq(formatted, f));
  47
  48         assert_se(rlimit_parse(resource, formatted, &rl2) >= 0);
  49         assert_se(memcmp(&rl, &rl2, sizeof(struct rlimit)) == 0);
  50 }
  51
  52 int main(int argc, char *argv[]) {
  53         struct rlimit old, new, high;
  54         struct rlimit err = {
  55                 .rlim_cur = 10,
  56                 .rlim_max = 5,
  57         };
  58
  59         log_parse_environment();
  60         log_open();
  61
  62         assert_se(drop_capability(CAP_SYS_RESOURCE) == 0);
  63
  64         assert_se(getrlimit(RLIMIT_NOFILE, &old) == 0);
  65         new.rlim_cur = MIN(5U, old.rlim_max);
  66         new.rlim_max = old.rlim_max;
  67         assert_se(setrlimit(RLIMIT_NOFILE, &new) >= 0);
  68
  69         assert_se(rlimit_from_string("LimitNOFILE") == RLIMIT_NOFILE);
  70         assert_se(rlimit_from_string("DefaultLimitNOFILE") == -1);
  71
  72         assert_se(streq_ptr(rlimit_to_string(RLIMIT_NOFILE), "LimitNOFILE"));
  73         assert_se(rlimit_to_string(-1) == NULL);
  74
  75         assert_se(getrlimit(RLIMIT_NOFILE, &old) == 0);
  76         assert_se(setrlimit_closest(RLIMIT_NOFILE, &old) == 0);
  77         assert_se(getrlimit(RLIMIT_NOFILE, &new) == 0);
  78         assert_se(old.rlim_cur == new.rlim_cur);
  79         assert_se(old.rlim_max == new.rlim_max);
  80
  81         assert_se(getrlimit(RLIMIT_NOFILE, &old) == 0);
  82         high = RLIMIT_MAKE_CONST(old.rlim_max == RLIM_INFINITY ? old.rlim_max : old.rlim_max + 1);
  83         assert_se(setrlimit_closest(RLIMIT_NOFILE, &high) == 0);
  84         assert_se(getrlimit(RLIMIT_NOFILE, &new) == 0);
  85         assert_se(new.rlim_max == old.rlim_max);
  86         assert_se(new.rlim_cur == new.rlim_max);
  87
  88         assert_se(getrlimit(RLIMIT_NOFILE, &old) == 0);
  89         assert_se(setrlimit_closest(RLIMIT_NOFILE, &err) == -EINVAL);
  90         assert_se(getrlimit(RLIMIT_NOFILE, &new) == 0);
  91         assert_se(old.rlim_cur == new.rlim_cur);
  92         assert_se(old.rlim_max == new.rlim_max);
  93
  94         test_rlimit_parse_format(RLIMIT_NOFILE, "4:5", 4, 5, 0, "4:5");
  95         test_rlimit_parse_format(RLIMIT_NOFILE, "6", 6, 6, 0, "6");
  96         test_rlimit_parse_format(RLIMIT_NOFILE, "infinity", RLIM_INFINITY, RLIM_INFINITY, 0, "infinity");
  97         test_rlimit_parse_format(RLIMIT_NOFILE, "infinity:infinity", RLIM_INFINITY, RLIM_INFINITY, 0, "infinity");
  98         test_rlimit_parse_format(RLIMIT_NOFILE, "8:infinity", 8, RLIM_INFINITY, 0, "8:infinity");
  99         test_rlimit_parse_format(RLIMIT_CPU, "25min:13h", (25*USEC_PER_MINUTE) / USEC_PER_SEC, (13*USEC_PER_HOUR) / USEC_PER_SEC, 0, "1500:46800");
 100         test_rlimit_parse_format(RLIMIT_NOFILE, "", 0, 0, -EINVAL, NULL);
 101         test_rlimit_parse_format(RLIMIT_NOFILE, "5:4", 0, 0, -EILSEQ, NULL);
 102         test_rlimit_parse_format(RLIMIT_NOFILE, "5:4:3", 0, 0, -EINVAL, NULL);
 103         test_rlimit_parse_format(RLIMIT_NICE, "20", 20, 20, 0, "20");
 104         test_rlimit_parse_format(RLIMIT_NICE, "40", 40, 40, 0, "40");
 105         test_rlimit_parse_format(RLIMIT_NICE, "41", 41, 41, -ERANGE, "41");
 106         test_rlimit_parse_format(RLIMIT_NICE, "0", 0, 0, 0, "0");
 107         test_rlimit_parse_format(RLIMIT_NICE, "-7", 27, 27, 0, "27");
 108         test_rlimit_parse_format(RLIMIT_NICE, "-20", 40, 40, 0, "40");
 109         test_rlimit_parse_format(RLIMIT_NICE, "-21", 41, 41, -ERANGE, "41");
 110         test_rlimit_parse_format(RLIMIT_NICE, "-0", 20, 20, 0, "20");
 111         test_rlimit_parse_format(RLIMIT_NICE, "+7", 13, 13, 0, "13");
 112         test_rlimit_parse_format(RLIMIT_NICE, "+19", 1, 1, 0, "1");
 113         test_rlimit_parse_format(RLIMIT_NICE, "+20", 0, 0, -ERANGE, "0");
 114         test_rlimit_parse_format(RLIMIT_NICE, "+0", 20, 20, 0, "20");
 115
 116         return 0;
 117 }