src/shared/nsflags.c

   1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
   2
   3 #include <errno.h>
   4
   5 #include "alloc-util.h"
   6 #include "extract-word.h"
   7 #include "namespace-util.h"
   8 #include "nsflags.h"
   9 #include "string-util.h"
  10
  11 int namespace_flags_from_string(const char *name, unsigned long *ret) {
  12         unsigned long flags = 0;
  13         int r;
  14
  15         assert_se(ret);
  16
  17         for (;;) {
  18                 _cleanup_free_ char *word = NULL;
  19                 unsigned long f = 0;
  20                 unsigned i;
  21
  22                 r = extract_first_word(&name, &word, NULL, 0);
  23                 if (r < 0)
  24                         return r;
  25                 if (r == 0)
  26                         break;
  27
  28                 for (i = 0; namespace_info[i].proc_name; i++)
  29                         if (streq(word, namespace_info[i].proc_name)) {
  30                                  f = namespace_info[i].clone_flag;
  31                                  break;
  32                         }
  33
  34                 if (f == 0)
  35                         return -EINVAL;
  36
  37                 flags |= f;
  38         }
  39
  40         *ret = flags;
  41         return 0;
  42 }
  43
  44 int namespace_flags_to_string(unsigned long flags, char **ret) {
  45         _cleanup_free_ char *s = NULL;
  46         unsigned i;
  47
  48         for (i = 0; namespace_info[i].proc_name; i++) {
  49                 if ((flags & namespace_info[i].clone_flag) != namespace_info[i].clone_flag)
  50                         continue;
  51
  52                 if (!strextend_with_separator(&s, " ", namespace_info[i].proc_name))
  53                         return -ENOMEM;
  54         }
  55
  56         *ret = TAKE_PTR(s);
  57
  58         return 0;
  59 }
  60
  61 const char *namespace_single_flag_to_string(unsigned long flag) {
  62         for (unsigned i = 0; namespace_info[i].proc_name; i++)
  63                 if (namespace_info[i].clone_flag == flag)
  64                         return namespace_info[i].proc_name;
  65
  66         return NULL;
  67 }