root/kernel/syscalls/setgroups.c

/* */

DEFINITIONS

1. sys_setgroups

   1 /*
   2  * fiwix/kernel/syscalls/setgroups.c
   3  *
   4  * Copyright 2018, Jordi Sanfeliu. All rights reserved.
   5  * Distributed under the terms of the Fiwix License.
   6  */
   7 
   8 #include <fiwix/types.h>
   9 #include <fiwix/fs.h>
  10 #include <fiwix/process.h>
  11 #include <fiwix/errno.h>
  12 
  13 #ifdef __DEBUG__
  14 #include <fiwix/stdio.h>
  15 #endif /*__DEBUG__ */
  16 
  17 int sys_setgroups(__ssize_t size, const __gid_t *list)
  18 {
  19         int n, errno;
  20 
  21 #ifdef __DEBUG__
  22         printk("(pid %d) sys_setgroups(%d, 0x%08x)\n", current->pid, size, (unsigned int)list);
  23 #endif /*__DEBUG__ */
  24 
  25         if((errno = check_user_area(VERIFY_READ, list, sizeof(__gid_t)))) {
  26                 return errno;
  27         }
  28         if(!IS_SUPERUSER) {
  29                 return -EPERM;
  30         }
  31         if(size > NGROUPS_MAX) {
  32                 return -EINVAL;
  33         }
  34         for(n = 0; n < NGROUPS_MAX; n++) {
  35                 current->groups[n] = -1;
  36                 if(n < size) {
  37                         current->groups[n] = list[n];
  38                 }
  39         }
  40         return 0;
  41 }

/* */