src/test/test-procfs-util.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2
   3 #include <errno.h>
   4
   5 #include "format-util.h"
   6 #include "log.h"
   7 #include "procfs-util.h"
   8
   9 int main(int argc, char *argv[]) {
  10         char buf[CONST_MAX(FORMAT_TIMESPAN_MAX, FORMAT_BYTES_MAX)];
  11         nsec_t nsec;
  12         uint64_t v;
  13         int r;
  14
  15         log_parse_environment();
  16         log_open();
  17
  18         assert_se(procfs_cpu_get_usage(&nsec) >= 0);
  19         log_info("Current system CPU time: %s", format_timespan(buf, sizeof(buf), nsec/NSEC_PER_USEC, 1));
  20
  21         assert_se(procfs_memory_get_used(&v) >= 0);
  22         log_info("Current memory usage: %s", format_bytes(buf, sizeof(buf), v));
  23
  24         assert_se(procfs_tasks_get_current(&v) >= 0);
  25         log_info("Current number of tasks: %" PRIu64, v);
  26
  27         assert_se(procfs_tasks_get_limit(&v) >= 0);
  28         log_info("Limit of tasks: %" PRIu64, v);
  29         assert_se(v > 0);
  30         assert_se(procfs_tasks_set_limit(v) >= 0);
  31
  32         if (v > 100) {
  33                 uint64_t w;
  34                 r = procfs_tasks_set_limit(v-1);
  35                 assert_se(IN_SET(r, 0, -EPERM, -EACCES, -EROFS));
  36
  37                 assert_se(procfs_tasks_get_limit(&w) >= 0);
  38                 assert_se((r == 0 && w == v - 1) || (r < 0 && w == v));
  39
  40                 assert_se(procfs_tasks_set_limit(v) >= 0);
  41
  42                 assert_se(procfs_tasks_get_limit(&w) >= 0);
  43                 assert_se(v == w);
  44         }
  45
  46         return 0;
  47 }