src/shared/nsflags.c

   1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
   2
   3 #include "alloc-util.h"
   4 #include "extract-word.h"
   5 #include "namespace-util.h"
   6 #include "nsflags.h"
   7 #include "string-util.h"
   8
   9 int namespace_flags_from_string(const char *name, unsigned long *ret) {
  10         unsigned long flags = 0;
  11         int r;
  12
  13         assert_se(ret);
  14
  15         for (;;) {
  16                 _cleanup_free_ char *word = NULL;
  17                 unsigned long f = 0;
  18                 unsigned i;
  19
  20                 r = extract_first_word(&name, &word, NULL, 0);
  21                 if (r < 0)
  22                         return r;
  23                 if (r == 0)
  24                         break;
  25
  26                 for (i = 0; namespace_info[i].proc_name; i++)
  27                         if (streq(word, namespace_info[i].proc_name)) {
  28                                  f = namespace_info[i].clone_flag;
  29                                  break;
  30                         }
  31
  32                 if (f == 0)
  33                         return -EINVAL;
  34
  35                 flags |= f;
  36         }
  37
  38         *ret = flags;
  39         return 0;
  40 }
  41
  42 int namespace_flags_to_string(unsigned long flags, char **ret) {
  43         _cleanup_free_ char *s = NULL;
  44         unsigned i;
  45
  46         for (i = 0; namespace_info[i].proc_name; i++) {
  47                 if ((flags & namespace_info[i].clone_flag) != namespace_info[i].clone_flag)
  48                         continue;
  49
  50                 if (!strextend_with_separator(&s, " ", namespace_info[i].proc_name))
  51                         return -ENOMEM;
  52         }
  53
  54         *ret = TAKE_PTR(s);
  55
  56         return 0;
  57 }
  58
  59 const char* namespace_single_flag_to_string(unsigned long flag) {
  60         for (unsigned i = 0; namespace_info[i].proc_name; i++)
  61                 if (namespace_info[i].clone_flag == flag)
  62                         return namespace_info[i].proc_name;
  63
  64         return NULL;
  65 }